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Plate AT-B

Bones

Landmarks, fracture patterns, pressure points, and the cord levels that decide function.

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TEXT ONLY — NOT A SEPARATE PART OF THIS MODEL: Bone as tissue · Coccyx

Head and neck

3 structures

Head and neck

Mandible and maxilla

The lower jaw (mandible), the face's only movable bone, and the upper jaw (maxilla), which holds the upper teeth and forms the front of the hard palate and most of each eye-socket floor.

Why the exam cares

The jaw is what the nurse lifts to open an airway without moving the neck, and a broken jaw is an airway problem before it is a bone problem. Facial trauma questions are really questions about breathing.

How to find it

  • The angle of the mandible is the corner of the jaw, just below and in front of the ear lobe. The nurse's fingers go behind it for a jaw thrust.
  • The chin (mental protuberance) is the front point of the mandible.
  • The maxilla sits under the eyes, beside the nose, and above the upper teeth. After a hard blow here, the nurse looks for a flattened or lengthened face, teeth that no longer meet, and clear fluid from the nose, and reports these without moving the bones. Testing the midface for movement is left to the provider.

Procedure

Jaw thrust for suspected neck injury

Critical

With a possible cervical spine injury, the nurse opens the airway by placing fingers behind both angles of the mandible and lifting the jaw forward, without tilting the head. Lifting the jaw pulls the tongue off the back of the throat while the neck stays still.

Emergency

Facial fracture and the airway

Critical

A broken mandible or maxilla bleeds into the mouth, swells, and can let the tongue or loose bone fall backward. The nurse sits the patient up if the spine allows, suctions blood, and watches for stridor, drooling, and a voice change. Nothing goes through the nose (no nasogastric tube, no nasal airway) when the midface is broken, because the fracture may open into the skull base.

Procedure

Wired jaw at the bedside

Critical

After a jaw is wired shut, the nurse keeps wire cutters (or scissors for elastic bands) and suction at the bedside and gives antiemetics on time. If the patient vomits, the nurse turns them onto their side and suctions first; the wires are cut only if the airway cannot be cleared. The patient goes home with cutters and is taught the same rule.

Physiological AdaptationReduction of Risk Potential
Head and neck

Occipital bone

The single bone that forms the back of the skull and the rear part of its base, with a large opening, the foramen magnum, where the spinal cord leaves the skull.

Why the exam cares

A patient who cannot lift or turn their head rests its whole weight on the occiput, a pressure injury site hidden under the hair. After a fall onto the back of the head, a fracture through the skull base can leak cerebrospinal fluid, and the nurse must keep anything out of the nose until that fracture is ruled out.

How to find it

  • The rounded back of the head where it rests on the pillow.
  • The small midline bump at the back of the head (external occipital protuberance).
  • Part the hair to see the skin; it cannot be inspected otherwise.
  • In a supine infant, the relatively large, prominent back of the head carries much of the head's weight on the mattress.

Pressure point

Occiput in the supine patient

Watch

The nurse parts the hair and inspects the back of the head at every skin assessment in anyone who cannot move their own head, such as young infants, sedated or ventilated adults, and patients in cervical collars. The head position is changed with each turn and a pressure-redistributing pillow is used, but a patient in a collar is logrolled while a second person holds the neck in line, and the skin under the collar is checked per order and facility policy. Thinning hair over the occiput is a warning sign of sustained pressure that calls for closer inspection and offloading; non-blanchable redness, deep red, maroon, or purple skin, or broken skin there is documented and reported as a pressure injury.

Assessment

Infant head shape

A baby kept in the same position can develop a flat spot on the back or side of the head (positional plagiocephaly). The nurse teaches parents to alternate which way the head faces in the crib, give supervised tummy time while awake, and limit time in car seats and carriers outside the car. The baby still goes to sleep on the back, because that position lowers the risk of sudden infant death.

Fracture

Basilar skull fracture after a fall

Critical

After a blow to the back of the head, the nurse checks level of consciousness and pupils and looks for bruising behind the ear or around the eyes and clear drainage from the nose or ear, testing the drainage with a halo on gauze or a glucose check. Drainage is never packed or plugged, and no nasogastric tube, nasal suctioning, or nose-blowing is allowed, because a tube can pass through a fractured skull base into the brain and leaking fluid means an open path for infection. Any drop in level of consciousness, new pupil change, or worsening headache and vomiting is reported at once as a sign of bleeding or rising pressure inside the skull.

Reduction of Risk PotentialPhysiological AdaptationHealth Promotion and Maintenance
Head and neckHigh yield

Skull (cranium)

The bony case around the brain, with a rounded vault on top, a thick base underneath, and soft gaps (fontanelles) between the bones in infants.

Why the exam cares

Once its bones have joined, the skull cannot stretch, so swelling inside it squeezes the brain, and a crack through its base opens a path from the nose or ear to the fluid around the brain. Questions ask which change the nurse reports first, and which routine action, such as a nasogastric tube, nasal suction, or packing a leak, is now forbidden.

How to find it

  • Anterior fontanelle: the diamond-shaped soft spot at the top front of an infant's head, where the frontal and parietal bones meet. It usually closes by about 18 months.
  • Posterior fontanelle: the small triangle at the back of the head, where the parietal bones meet the occipital bone. It usually closes by about 2 months and may already be closed at birth.
  • Mastoid process: the bony bump just behind and below each ear, where Battle sign bruising shows up.
  • Orbits (eye sockets): their roofs form the floor of the front of the skull base, so a fracture there bleeds into the tissue around both eyes (raccoon eyes).

Assessment

Fontanelle check in the infant

Watch

The nurse feels the anterior fontanelle with the infant calm and held upright; it should feel soft and flat. Crying, vomiting, and lying down can make a normal fontanelle bulge, so the nurse rechecks once the baby is quiet. A tense, bulging fontanelle in a calm, upright infant suggests raised pressure inside the skull and is reported right away; a sunken one suggests dehydration.

Emergency

Basilar skull fracture signs

Critical

Bruising over the mastoid (Battle sign), bruising around both eyes (raccoon eyes), or clear fluid from the nose or ear point to a fracture through the skull base. The bruising may not appear for a day or more, so its absence soon after the injury does not rule out a fracture. A halo ring on gauze or drainage that tests positive for glucose suggests spinal fluid, and the nurse reports it promptly. Nothing goes through the nose: no nasogastric tube, no nasal suction, no nasopharyngeal airway, and the patient is told not to blow the nose.

Assessment

Rising intracranial pressure

Critical

Because the closed skull cannot expand, a change in level of consciousness is the earliest sign of rising pressure, and the nurse reports it without waiting for vital signs to change. Rising systolic pressure with a widening pulse pressure, a slow heart rate, and irregular breathing (Cushing triad) are late signs. The nurse keeps the head of the bed raised about 30 degrees with the head and neck midline, and avoids straining, coughing, and sharp hip or neck flexion.

Procedure

Do not pack a CSF leak

Critical

Leaking spinal fluid is allowed to drain onto a loose sterile dressing that is changed as it gets wet. Packing the nose or ear traps fluid at an open path to the brain and raises the risk of meningitis, so the nurse never plugs the leak and watches for fever, stiff neck, and worsening headache.

Physiological AdaptationReduction of Risk PotentialHealth Promotion and Maintenance

Thorax

3 structures

Thorax

Clavicle

The collarbone: an S-shaped bone just under the skin at the top of the chest, running from the top of the breastbone out to the tip of the shoulder, with the subclavian vein and the top of the lung close beneath its inner half.

Why the exam cares

It is the bone most often broken during birth and one of the most commonly broken bones at any age, usually from a fall onto the shoulder or an outstretched hand. The nurse checks a newborn's arm movement and Moro reflex after a hard delivery, checks circulation and feeling in the hand after an adult's fracture, and runs nothing through a new subclavian line until the chest X-ray is read.

How to find it

  • Run a finger from the notch at the top of the breastbone out to the shoulder; the whole clavicle is right under the skin.
  • The subclavian vein passes behind the clavicle where its inner and middle thirds meet, which is where a subclavian central line goes in.
  • The top of the lung rises just above the level of the inner third of the clavicle, close to that needle path.
  • At the top of the shoulder the outer end of the clavicle meets the acromion, the bony tip of the shoulder blade; the deltoid injection site is measured down from the acromion.

Fracture

Newborn clavicle fracture

A large baby or a hard shoulder delivery can break the clavicle. The nurse looks for a baby who does not move one arm, a Moro reflex missing on that side, crying when the arm is moved, or crepitus and swelling over the bone, and reports it. The bone heals on its own; the nurse handles the arm gently, pins the sleeve to the shirt if ordered, and teaches parents that a small firm bump will form over the bone as it heals.

Fracture

Adult clavicle fracture

After a fall onto the shoulder, the patient usually holds the injured arm against the body, and a displaced break makes the shoulder sag down and forward. The nurse checks pulse, color, warmth, and sensation in that hand, because the vessels and nerves to the arm run just beneath the bone, and applies a sling as ordered.

Procedure

Subclavian central line

Critical

The needle for a subclavian line passes close to the top of the lung, so pneumothorax is a known risk of this site. The nurse infuses nothing through the new line until a chest X-ray confirms the tip position and shows no pneumothorax, because fluid run into a misplaced catheter can go into the chest. After insertion the nurse watches for sudden shortness of breath, chest pain, diminished breath sounds on that side, or a falling oxygen saturation and reports them at once.

Reduction of Risk PotentialHealth Promotion and Maintenance
ThoraxHigh yield

Ribs

Twelve pairs of curved bones that run from the spine toward the front of the chest, and each gap between them is named for the rib above it.

Why the exam cares

The nurse counts intercostal spaces to find the apical pulse before digoxin and to place the stethoscope over each heart valve. Rib injuries test priorities: keep a patient with a broken rib breathing deeply instead of binding the chest, and treat paradoxical chest movement or the signs of tension pneumothorax as emergencies to report at once, not after an x-ray.

How to find it

  • Feel the ridge of the sternal angle, slide sideways onto the second rib, and the space just below it is the second intercostal space. Count down from there.
  • In an adult man the nipple usually sits at about the fourth intercostal space; the fifth space at the left midclavicular line is the mitral area.
  • A vein, artery, and nerve run in a groove along the underside of each rib, so a needle or chest tube goes in over the top edge of the rib below.
  • Ribs 1 to 7 reach the sternum by their own cartilage, ribs 8 to 10 join the cartilage above, and ribs 11 and 12 float free. The kidneys sit partly behind the lowest ribs, so the nurse checks for kidney tenderness where the twelfth rib meets the spine.

Auscultation

Heart sounds and the apical pulse

Watch

Aortic is the second space at the right sternal border, pulmonic the second space at the left sternal border, Erb's point the third space at the left sternal border, tricuspid the fourth space at the left sternal border, and mitral the fifth space at the left midclavicular line. The nurse counts the apical pulse at the mitral site for a full minute before digoxin and holds the dose and notifies the provider if an adult's rate is under 60, because digoxin slows conduction through the AV node. The nurse also asks about loss of appetite, nausea, vomiting, and visual changes, which are early signs of digoxin toxicity.

Fracture

Rib fracture and shallow breathing

Watch

A broken rib hurts with every breath, so the patient breathes shallowly and avoids coughing, which leads to atelectasis and pneumonia. The nurse gives ordered pain medicine on time, coaches deep breathing, coughing, and incentive spirometry, and does not bind or tape the chest, because that limits lung expansion further.

Emergency

Flail chest

Critical

Two or more adjacent ribs broken in two or more places leave a loose segment that sinks in on inspiration and bulges out on expiration, opposite to the rest of the chest. The nurse gives oxygen, watches for falling oxygen saturation and signs of a bruised lung or pneumothorax, and prepares for intubation and mechanical ventilation if breathing fails.

Emergency

Tension pneumothorax

Critical

Absent breath sounds on one side, a trachea pushed toward the other side, distended neck veins, and a falling blood pressure mean trapped air is compressing the lung and heart. The nurse calls the provider at once, gives high-flow oxygen, and prepares for needle decompression at the second intercostal space in the midclavicular line or a lateral site per protocol, followed by a chest tube. The nurse does not wait for a chest x-ray, because the patient can go into cardiac arrest in that time.

Physiological AdaptationReduction of Risk PotentialPharmacological and Parenteral Therapiesheart failure
ThoraxHigh yield

Sternum

The sternum is the breastbone, a flat bone in the midline of the front of the chest made of three parts: the manubrium at the top, the body, and the small xiphoid process at the bottom.

Why the exam cares

The nurse puts compressions on the lower half of the sternum and keeps both compressions and abdominal thrusts off the xiphoid. The xiphoid is also the end point for measuring an NG tube, and a wired sternum after open-heart surgery needs precautions the nurse teaches.

How to find it

  • The jugular (suprasternal) notch is the dip at the top of the manubrium, between the inner ends of the two collarbones.
  • The sternal angle (angle of Louis) is a horizontal ridge about 2 inches (5 cm) below the notch, where the manubrium meets the body. The second rib attaches here, so the nurse counts ribs and intercostal spaces down from it.
  • The xiphoid process is the narrow tip at the bottom of the sternum, in the midline where the lower rib margins meet. The nurse keeps compressions and thrusts off it.
  • The adult CPR hand position is the lower half of the sternum in the center of the chest, found by the bone itself rather than by the nipples.

Emergency

CPR hand position

Critical

For an adult, the nurse places the heel of one hand on the lower half of the sternum, the other hand on top, and pushes straight down at least 2 inches but no more than 2.4 inches at 100 to 120 per minute, letting the chest fully recoil each time. Hands stay above the xiphoid, because pressure there can injure the liver beneath.

Emergency

Abdominal thrusts for a choking adult

Watch

The nurse stands behind the patient and places the thumb side of a fist just above the navel and well below the xiphoid, then gives quick inward and upward thrusts. Thrusts placed too high, over the xiphoid or ribs, can cause internal injury. A patient who is visibly pregnant or too large to reach around gets chest thrusts instead.

Procedure

Measuring an NG tube

Critical

Before inserting a nasogastric tube, the nurse measures from the tip of the nose to the earlobe and then down to the xiphoid process, and marks that length on the tube. This length only estimates the distance to the stomach, so placement is confirmed by x-ray before the first feeding or medication. The nurse documents the external length at the nostril and checks it before each use per facility policy, because a tube that has moved can deliver feeding or medication into the esophagus or airway.

Procedure

Sternal precautions after cardiac surgery

Watch

After a median sternotomy, the sternum is wired closed and takes about 6 to 8 weeks to heal. The nurse teaches the patient to hug a pillow when coughing, not to push up from a bed or chair with the arms, not to lift more than the prescribed limit (commonly about 5 to 10 pounds), and to follow any arm-movement limits the surgeon orders. The patient reports clicking or shifting in the chest, or redness or drainage at the incision, because these can signal the sternum separating or an infection.

Physiological AdaptationReduction of Risk Potential

Abdomen and pelvis

5 structures

Abdomen and pelvis

Ischial tuberosity

The sitting bone: the rough knob at the bottom of each ischium, in the lower buttock, that takes the body's weight in a chair.

Why the exam cares

Which bony point breaks down depends on position: upright sitting loads the ischial tuberosities, lying flat loads the sacrum and heels, and slumping or semi-reclining adds shear over the sacrum and coccyx. A wheelchair user with no sensation below the waist cannot feel the warning, so the nurse matches prevention to the position the patient spends the day in.

How to find it

  • Sit on the hands: the two hard knobs pressing into the palms are the ischial tuberosities.
  • They lie deep to the lower buttock near the gluteal fold, the crease between buttock and thigh.
  • Standing, the gluteus maximus covers them. When the hip flexes to sit, the muscle slides off, leaving only skin and fat over the bone.
  • The sciatic nerve runs down the back of the thigh lateral to the tuberosity, about midway toward the greater trochanter.

Pressure point

Sitting pressure injury

Watch

In a chair the tuberosities carry most of the body's weight over a small area of skin. The nurse teaches a wheelchair user to shift weight about every 15 to 30 minutes by leaning side to side, leaning forward, or pushing up on the armrests, and to sit on a pressure-redistributing foam, gel, or air cushion, never a donut or ring cushion, which concentrates pressure around the rim. A patient who cannot shift their own weight is repositioned or returned to bed after about an hour in the chair.

Assessment

Skin check after sitting

After time in a chair, the nurse, or the patient using a long-handled mirror, inspects the skin over both tuberosities and presses on any red area. Redness that blanches and fades after pressure is relieved is expected; redness that does not blanch is a stage 1 pressure injury, and the cushion, the sitting schedule, or both must change. On darkly pigmented skin, the nurse compares the area with nearby skin for a darker color, a change in warmth, firmness, bogginess, or pain.

Basic Care and ComfortReduction of Risk Potential
Abdomen and pelvisHigh yield

Ischium, pubis, and pelvic outlet

The lower and front bones of the pelvic ring: the ischium you sit on, the two pubic bones joined in front at the symphysis pubis, and the bony opening they help frame at the bottom, the pelvic outlet.

Why the exam cares

In labor, these bones are the ruler: station is counted from the ischial spines, fundal height is measured from the symphysis pubis, and suprapubic pressure is applied just above it. Outside labor, the nurse protects the skin over the sitting bones and, after a pelvic fracture, holds the catheter when there are signs of urethral injury.

How to find it

  • Symphysis pubis: the firm midline ridge at the very bottom of the abdomen, just above the genitals; fundal height is taped from its top edge.
  • Ischial tuberosities: the sitting bones, felt as hard knobs deep in each buttock when the hip is flexed; body weight rests on them in a chair.
  • Ischial spines: not felt from the outside; the examiner reaches them on the side walls of the pelvis during a vaginal exam.
  • Pelvic outlet: the opening framed by the pubic arch in front, the ischial tuberosities at the sides, and the coccyx behind; the last bony passage for the baby.

Emergency

Shoulder dystocia: press above the symphysis

Critical

When the baby's shoulder catches behind the symphysis pubis, the nurse calls for help, flexes the mother's thighs back toward her abdomen, and applies firm pressure just above the symphysis as the provider directs. Never push on the fundus, because that wedges the shoulder tighter against the pubic bone and raises the risk of injury to the baby.

Landmark

Station 0 at the ischial spines

Watch

Station is how many centimeters the presenting part sits above (minus) or below (plus) the ischial spines, and station 0 is taught as engaged. After any rupture of membranes the nurse checks fetal heart tones right away. The risk of cord prolapse is highest while station is still negative, because the cord can slip past a part that has not filled the pelvis.

Pressure point

Ischial tuberosities in the seated patient

In a chair the body's weight rests on two small bony points, so the skin over the ischial tuberosities breaks down quickly. The nurse teaches a patient who can move to shift weight every 15 minutes, and repositions a chair-bound patient who cannot shift alone at least every hour and limits their chair time. The nurse inspects the skin over the sitting bones when the patient returns to bed.

Fracture

Pelvic fracture: blood at the meatus

Critical

A pelvic fracture can tear the urethra and can bleed heavily. Blood at the urethral meatus, bruising of the perineum or scrotum, or inability to void means the nurse does not insert a urinary catheter and notifies the provider so the urethra can be checked first. The nurse also watches for falling blood pressure and a rising pulse, because a large amount of blood can collect inside the pelvis unseen.

Health Promotion and MaintenancePhysiological AdaptationBasic Care and Comfort
Abdomen and pelvisHigh yield

Pelvis: ilium and iliac crest

The broad wing of the hip bone; its top ridge is the iliac crest felt at the waist, and its front tip is the anterior superior iliac spine (ASIS).

Why the exam cares

The crest and ASIS are two of the three fingers-on-bone landmarks the NCLEX expects the nurse to name for the ventrogluteal injection, the safest large IM site because no major nerve or vessel runs under it. The back of the crest is where marrow is taken for biopsy, and a line across the tops of both crests marks the level for lumbar puncture, so both procedures' nursing care hangs on this bone.

How to find it

  • The iliac crest is the ridge the hands rest on when placed on the hips; follow it forward to the ASIS.
  • The ASIS is the bony bump at the front of the hip, at the top of the groin crease.
  • The posterior superior iliac spine sits under the dimple on the low back and is the marrow biopsy site.
  • A line across the tops of both crests crosses the spine at about L4, the lumbar puncture landmark.

Injection site

Ventrogluteal landmark

With the patient side-lying, supine, or prone, the nurse places the heel of the opposite hand on the greater trochanter, points the index finger to the ASIS, and spreads the middle finger back along the iliac crest. The injection goes into the center of the V between the two fingers. This is the preferred IM site for adults and for children over about 7 months, for volumes up to about 3 mL, because the sciatic nerve and large vessels lie well away from it.

Procedure

Bone marrow biopsy at the posterior crest

Watch

The nurse positions the patient prone or side-lying, explains the deep pressure and brief sharp pull as the sample is drawn, and afterward holds firm pressure and applies a pressure dressing. The patient lies on the site for about 30 to 60 minutes while the nurse checks the dressing for bleeding and asks about pain. Because the biopsy is often done for a blood disorder, platelets may be low, and a site that keeps oozing is a bleed the nurse reports rather than re-dresses.

Landmark

Line across the crests for lumbar puncture

The line between the tops of both iliac crests crosses about the L4 spine, so the provider enters at L3-L4 or L4-L5, below where the spinal cord ends at about L1-L2. The nurse's job is to position the patient side-lying with knees drawn to the chest and chin tucked, which opens those interspaces, and to hold that position so the needle stays at the marked level.

Pharmacological and Parenteral TherapiesReduction of Risk Potential
Abdomen and pelvisHigh yield

Pelvis: pelvic ring fracture

A break in the bony ring at the base of the trunk, formed by the two hip bones joined to the sacrum behind and to each other at the pubic symphysis in front, which surrounds the bladder, rectum, and large iliac vessels.

Why the exam cares

A broken pelvis can bleed liters into a space the nurse cannot see, and the fragments can tear the bladder or, in a male patient, the urethra. The exam question is about spotting hidden shock early and about not inserting a urinary catheter until the urethra has been cleared.

How to find it

  • The iliac crests, at about the L4 level near the waist, form the top of the ring, and the pubic symphysis is the midline joint felt low in front; because it is a ring, a break in front at the pubic rami or symphysis usually pairs with a second break or joint disruption behind at the sacrum or sacroiliac joints.
  • The greater trochanters, the bony knobs at the sides of the upper thighs, are where a pelvic binder or folded sheet is centered; a wrap placed up at the iliac crests does not close the ring.
  • In a male patient the posterior urethra, where the membranous part meets the bulbar part, sits just below the pubic arch, so a fracture at the front of the pelvis can tear it; the short female urethra is rarely injured.

Emergency

Hemorrhage and hidden shock

Critical

The nurse watches for a rising heart rate, narrowing pulse pressure, falling blood pressure, cool pale skin, and spreading flank, perineal, or scrotal bruising, starts two large-bore IVs, and applies a pelvic binder or folded sheet centered at the greater trochanters as ordered to close the ring and slow the bleeding. The nurse does not rock or press on the pelvis to check it and moves the patient as little as possible, because movement can dislodge clot and restart bleeding.

Assessment

Bladder and urethral injury

Critical

Blood at the urethral meatus, blood in the urine, inability to void, or perineal or scrotal bruising mean the urethra or bladder may be torn. The nurse does not insert a urinary catheter and reports the finding, because a catheter can turn a partial urethral tear into a complete one; the provider rules out urethral injury first, usually with a retrograde urethrogram.

Assessment

Neurovascular check of the legs

Watch

The nurse checks pedal pulses, color, sensation, and movement in both feet and compares side to side, because the lumbosacral nerves and the iliac vessels to the legs pass through the pelvis and can be torn or compressed by the fracture. A new deficit is reported right away.

Physiological AdaptationReduction of Risk Potential
Abdomen and pelvisHigh yield

Pubic symphysis

The joint at the front of the pelvis where the two pubic bones meet in the midline, joined by a pad of fibrocartilage that loosens in pregnancy.

Why the exam cares

Its top edge is the nurse's zero point for the lower belly, and the front shoulder of a baby can jam behind it. In a shoulder dystocia the nurse presses just above it and never on the fundus; after pelvic trauma, blood at the urethral opening means no urinary catheter until the provider clears the urethra.

How to find it

  • Press down in the midline just above the genitals until the fingers meet firm bone; that is the top of the symphysis.
  • Fundal height is measured from its top edge; the fundus rises just above it at about 12 weeks.
  • A full bladder rises above it as a smooth, rounded midline swelling. After birth it pushes the fundus up and to the right: a boggy fundus is massaged first, then the bladder is emptied (see Uterus).
  • A suprapubic catheter leaves the skin in the midline a short distance above it.

Emergency

Shoulder dystocia: pressure above the symphysis

Critical

When the baby's head delivers and pulls back tight against the perineum, the front shoulder is stuck behind the symphysis. The nurse calls for help, notes the time, helps pull the mother's thighs back toward her belly (McRoberts), and gives firm pressure with the heel of the hand just above the symphysis as the provider directs. The nurse never pushes on the fundus, because that drives the shoulder harder against the bone.

Fracture

Pelvic ring injury and the urethra

Critical

After a crash or fall, pelvic pain, perineal bruising, or blood at the urethral opening can mean a broken pelvic ring, which can bleed heavily inside the pelvis. The nurse keeps the patient still, does not rock the pelvis to test it, and watches for shock: a climbing heart rate and falling blood pressure. With blood at the meatus the nurse does not insert a urinary catheter and reports it, because a catheter can worsen a torn urethra.

Procedure

Suprapubic catheter

Watch

This catheter enters the bladder through the lower abdominal wall above the symphysis when the urethra cannot be used. The nurse keeps the site clean and dry, secures the tube so it cannot pull, and checks that urine drains and the skin around it is intact. If a newly placed tube comes out, the nurse covers the site and notifies the provider at once instead of reinserting it, because a fresh tract can close quickly and leave the bladder no way to empty.

Physiological AdaptationReduction of Risk PotentialHealth Promotion and Maintenance

Spine

7 structures

SpineHigh yield

Bone as tissue

Bone is living tissue that is constantly broken down and rebuilt, with a hard outer layer over spongy bone and marrow, and growth plates near the ends of a child's long bones.

Why the exam cares

Bone is always being removed and replaced, and the NCLEX asks what tips that balance and what the nurse does about it. Expect questions on taking an oral bisphosphonate safely, osteoporosis prevention teaching, calcium loss during immobility, and growth plate fractures in children.

How to find it

  • The growth plate sits near each end of a child's long bone, between the shaft and the rounded end; on X-ray it shows as a dark (radiolucent) line.
  • Osteoporosis fractures happen most often in the spine, hip, and wrist. A wrist or spine fracture is often the first sign, and lost height with a rounded upper back points to spine compression fractures.
  • A bone density (DEXA) scan measures the hip and spine; a T-score of -2.5 or lower means osteoporosis.

Assessment

Osteoporosis prevention and oral bisphosphonates

Watch

The nurse teaches enough calcium and vitamin D (about 1,200 mg of calcium a day for women over 50 and men over 70), weight-bearing exercise like walking, no smoking, limited alcohol, and a fall-proofed home, because a hip fracture can end an older adult's independence. An oral bisphosphonate is taken first thing in the morning on an empty stomach with a full glass of plain water, and the patient stays upright and takes no food, drink, or other medicine for at least 30 minutes (60 minutes for ibandronate), because a pill that lingers can ulcerate the esophagus. New heartburn, painful swallowing, or chest pain after a dose is reported to the provider.

Assessment

Immobility pulls calcium out of bone

Watch

Bone that bears no weight is broken down, so a patient on prolonged bed rest or with a spinal cord injury releases calcium into the blood. The nurse watches for constipation, nausea, confusion, and flank pain from kidney stones, and reports a rising serum calcium. The nurse gets the patient bearing weight as early as allowed and encourages about 2 to 3 liters of fluid a day unless fluids are restricted.

Fracture

Growth plate injury in children

Watch

A fracture through a growth plate can slow or stop growth of that bone, leaving the limb shorter or bent. A growth plate fracture can look normal on the first X-ray, so the nurse treats swelling and point tenderness near the end of a child's long bone as a possible fracture: immobilize it and make sure orthopedic follow-up happens rather than reassuring the family.

Health Promotion and MaintenancePharmacological and Parenteral TherapiesReduction of Risk Potential
SpineHigh yield

Cervical vertebrae C1–C7

The seven bones of the neck, running from C1 (the atlas) just under the skull, through C2 (the axis) with its upright peg, down to C7 at the base of the neck.

Why the exam cares

A broken or unstable neck bone can shift and injure the spinal cord in the neck, and injuries at C3 to C5 or above can stop the diaphragm. The nurse keeps the head and neck still until imaging and exam clear the spine, keeps the collar or halo secure, and catches failing breathing early.

How to find it

  • With the head bent forward, C7 is usually the most prominent bump in the midline at the base of the neck. If two bumps look equally prominent, the upper one is usually C7; it shifts a little as the neck bends and straightens, while T1 below it barely moves.
  • The thyroid cartilage (the Adam's apple) sits in front of about C4 to C5, and the cricoid ring just below it sits in front of about C6.
  • The carotid pulse is felt beside the thyroid cartilage, in the groove between the trachea and the sternocleidomastoid muscle, one side at a time.

Procedure

Cervical spine precautions

Critical

Until imaging and exam clear the spine, the head and neck stay in line with the body: a rigid collar, a jaw thrust instead of a head tilt to open the airway, and a log roll with one person holding the head and calling the count. The nurse never lifts the patient by the shoulders or turns the trunk without the head, because movement at an unstable level can injure the cord or make an existing injury worse.

Nerve

Swelling can climb toward the phrenic nerve

Critical

The phrenic nerve leaves the cord at C3 to C5 (see Spinal cord), and swelling after a neck injury can spread upward over the first few days, so a patient who breathes well on admission can tire later. The nurse trends respiratory rate, cough strength, and vital capacity as ordered, keeps suction and intubation equipment ready, and reports a rising rate or weakening cough right away. Oxygen saturation can stay normal until breathing is already failing, so it is not the sign to wait for.

Procedure

Halo vest care

Watch

A halo holds the neck still with pins into the skull and a vest on the chest. The nurse cleans pin sites as ordered and reports redness, drainage, or a loose pin, keeps the correct wrench taped to the vest so the front can be opened for CPR, checks the skin at the vest edges, and never uses the halo bars to lift or turn the patient.

Pressure point

Skin under a rigid collar

Watch

A rigid collar presses on the back of the head, the chin and jaw, the ears, and the collarbones, and trapped moisture speeds skin breakdown. The nurse inspects and cleans under the collar and changes pads as ordered, with a second person holding the head in line whenever the collar is opened, because the neck is unprotected while the collar is off.

Physiological AdaptationSafety and Infection ControlReduction of Risk Potential
Spine

Coccyx

The coccyx, or tailbone, is a small bone of usually four fused vertebrae at the very bottom of the spine, joined to the lower tip of the sacrum.

Why the exam cares

A patient who slides down in bed or slumps in a chair puts pressure and shear on the tissue over the tailbone, so the nurse controls the head-of-bed angle, the turn schedule, and the seat cushion. After a fall onto the buttocks, the nurse checks for nerve signs before treating the pain as a simple bruise.

How to find it

  • Follow the midline of the sacrum down into the buttock cleft. The coccyx is the narrow segment below the sacrum, felt deeper in the cleft.
  • Its tip curves forward and ends a short way behind the anus.
  • Sitting upright puts weight on the ischial tuberosities. Slumping or reclining back shifts the weight onto the sacrum and coccyx.
  • When charting skin damage, name the site you see: the sacrum is the broad, flat bone above and at the top of the cleft, and the coccyx is the narrow tip below it, deeper in the cleft.

Pressure point

Sliding and slumping

Watch

With the head of the bed raised high, the patient slides toward the foot. The skin over the tailbone stays stuck to the sheet while the bone and deeper tissue move down, which stretches and kinks the deep blood vessels (shear); skin rubbing across the sheet is a separate injury (friction). The nurse keeps the head of the bed at 30 degrees or lower unless contraindicated, raises the knees slightly to stop sliding, repositions at least every 2 hours or per facility policy, and uses a lift sheet with help instead of dragging the patient up. In a chair, the nurse uses a pressure-redistributing cushion, never a donut or ring, because a ring presses hard on the tissue it touches and cuts blood flow to the tissue inside it.

Assessment

Tailbone injury from a fall

Watch

A backward fall onto the buttocks usually bruises the coccyx; a fracture is less common, and both cause pain on sitting and when the tailbone is pressed. The nurse checks for other injuries and asks about numbness or weakness in the legs, numbness between the legs, and new bladder or bowel changes, and reports any of these to the provider right away because they point to nerve or spinal injury. For an ordinary bruise, the nurse teaches the patient to sit on a wedge or cut-out cushion, lean forward when seated, take pain medicine as ordered, and use a stool softener as ordered or recommended because straining hurts, and warns that sitting may hurt for several weeks.

Basic Care and ComfortReduction of Risk Potential
SpineHigh yield

Lumbar vertebrae L1–L5

The five large bones of the low back, between the rib cage and the sacrum, which are the biggest vertebrae and carry the most body weight.

Why the exam cares

In an adult the spinal cord ends at about L1 to L2, so a needle placed lower, at L3–L4 or L4–L5, enters spinal fluid and floating nerve roots without hitting the cord. The nurse positions the patient curled forward to open these spaces, reports warning signs before the procedure, and watches for the problems that follow it.

How to find it

  • A line across the tops of the two iliac crests crosses the spine at about L4; the nurse uses it to find the L3–L4 and L4–L5 spaces.
  • L5 is the last vertebra above the sacrum, at the bottom of the low-back curve.
  • The spaces are easier to feel when the patient curls forward, which spreads the spinous processes apart.

Procedure

Lumbar puncture: before, during, after

Critical

Before the tap, the nurse reports signs of raised intracranial pressure, such as headache with vomiting, a falling level of consciousness, or pupil changes, because draining fluid from below can shift the brain down and herniate the brainstem. The nurse positions the patient side-lying with knees drawn up and chin tucked, or sitting and leaning over a table. Afterward the patient lies flat as ordered, and the nurse checks the site for leaking or bleeding and asks about headache and leg numbness or weakness.

Procedure

Epidural in labor

Critical

An epidural goes into the same low lumbar spaces, and its most common side effect is a drop in maternal blood pressure, which reduces blood flow to the placenta and can slow the fetal heart rate. The nurse gives the ordered IV fluid bolus before placement, then checks blood pressure and fetal heart rate often per facility policy. If pressure falls, the nurse turns the patient to her side, increases IV fluids as ordered, and notifies the anesthesia provider right away.

Assessment

Low back mechanics and lifting

The low back takes the most strain when a person bends and twists. The nurse protects their own back and teaches patients to bend the knees, keep the load close, and pivot the feet instead of twisting the trunk. Use a slide sheet or mechanical lift to move a patient, not the nurse's back.

Reduction of Risk PotentialPharmacological and Parenteral TherapiesBasic Care and Comfort
SpineHigh yield

Sacrum

A triangle-shaped bone made of five fused vertebrae at the base of the spine, wedged between the two hip bones to form the back wall of the pelvis.

Why the exam cares

The sacrum is the most common site for a pressure injury, because a patient lying on their back or slid down in bed rests their weight and shear right on it. It is also where signs of an incomplete spinal cord injury show up, and where a bedbound patient's fluid pools.

How to find it

  • Below the lumbar spine, the separate bumps give way to one broad, curved bone with a bumpy midline ridge. That bone is the sacrum.
  • The two dimples on the low back sit over the posterior superior iliac spines, at about the level of the sacroiliac joints where the sacrum meets each hip bone.
  • The sacrum forms the top of the cleft between the buttocks; its narrow lower tip joins the coccyx (tailbone).
  • A patient lying flat or slumped in semi-Fowler's position presses the sacrum into the mattress.

Pressure point

Most common pressure injury site

Watch

The nurse inspects the sacral skin at every turn, keeps the head of the bed at 30 degrees or lower unless the patient's condition requires more so the patient does not slide and shear the skin, repositions at least every 2 hours, and keeps the skin clean and dry. Redness on intact skin that does not blanch is already a stage 1 injury. In darker skin, compare color, warmth, and firmness with the skin around it.

Assessment

Sacral edema in a bedbound patient

Fluid settles at the lowest point of the body, so in a heart-failure patient on bed rest the nurse presses over the sacrum to check for pitting, not only the ankles. New or worse sacral edema means fluid is building up and should be reported, and swollen skin here breaks down more easily.

Assessment

Sacral sparing after spinal cord injury

Any feeling around the anus, or the ability to squeeze the anal sphincter on command, means some cord fibers still carry signals and the injury is incomplete. The provider tests this during the neurologic exam. The nurse records these findings, keeps up serial neuro checks, and reports any change, because it affects the outlook for recovery.

Procedure

Caudal block

Anesthesia can be injected through the sacral hiatus, a small opening at the lower end of the sacrum, most often in children having surgery below the umbilicus. Afterward the nurse checks that movement and feeling return to the legs and watches for urinary retention, because the block also reaches the nerves that control the bladder.

Basic Care and ComfortReduction of Risk PotentialPhysiological Adaptationheart failure
SpineHigh yield

Thoracic vertebrae T1–T12

The twelve vertebrae of the mid-back, T1 through T12, where the ribs attach behind the chest and where the spine bows gently backward in the thoracic curve.

Why the exam cares

An older adult with sudden mid-back pain after a cough, a lift, or a minor fall is the exam's picture of an osteoporotic compression fracture, so the nurse checks leg strength, sensation, and bladder control and teaches fall and bone protection. These vertebrae also hold the T6 level, the injury height at or above which autonomic dysreflexia becomes a risk (see Spinal cord).

How to find it

  • C7 is the large bump at the base of the neck when the head bends forward; T1 is the next spinous process below it, and counting down from there finds each thoracic level.
  • With the arms relaxed at the sides, the lower tip of the shoulder blade lies at about the level of T7.
  • In the middle of the thoracic spine the spinous processes angle steeply downward, so the bump felt under the skin sits lower than the body of its own vertebra.
  • The twelfth rib is the last rib, and it joins the spine only at T12, the bottom of the thoracic spine.

Fracture

Osteoporotic compression fracture

Watch

The front of a weakened vertebral body, most often in the lower thoracic or upper lumbar spine, can collapse with little force and cause sudden back pain. The nurse checks leg strength, sensation, and bowel and bladder control and reports any new deficit right away, because bone fragments can press on the cord or nerve roots. Pain is controlled so the patient can get up early, since long bed rest speeds bone loss.

Assessment

Height loss and kyphosis

Repeated small compression fractures shorten the spine and round the upper back, often without a clear injury. The nurse measures height at routine visits and reports a loss, since it can be the first sign of osteoporosis and a reason for bone density testing. Teaching covers calcium and vitamin D, weight-bearing exercise, and home fall prevention.

Procedure

Suspected thoracic spine trauma

Critical

After a fall from a height or a car crash, the nurse keeps the head, neck, and trunk in line and turns the patient only by log-rolling with enough staff until the spine is cleared by the provider. Twisting an unstable fracture can injure the spinal cord. The nurse checks movement and sensation in the legs before and after each turn and reports any change at once.

Physiological AdaptationReduction of Risk PotentialHealth Promotion and Maintenance
Spine

Vertebral column curvatures

Seen from the side, the adult spine has four normal curves (the cervical and lumbar curves bow inward, the thoracic and sacral curves bow outward), and the three named problems are kyphosis (an exaggerated thoracic hump), lordosis (an exaggerated lumbar swayback), and scoliosis (a sideways curve).

Why the exam cares

Each abnormal curve belongs to a different patient and a different nursing action. The nurse screens teens for scoliosis and refers a positive test, watches older adults for height loss and a new hump that suggest compression fractures, and teaches the pregnant patient how to protect her back.

How to find it

  • From the side: the thoracic and sacral curves bow outward and are present at birth; the cervical and lumbar curves bow inward and form as the infant lifts the head and then walks.
  • Kyphosis looks like a rounded hump in the upper back. Lordosis looks like a deep hollow in the low back.
  • Scoliosis is seen from behind: one shoulder higher, an uneven waist crease, one hip higher, or one shoulder blade sticking out more.
  • From behind, the spinous processes should run in a straight line from C7, the bump at the base of the neck, down to the sacrum.

Assessment

Forward-bend scoliosis screening

The nurse has the child stand with feet together, then bend forward at the waist with arms hanging, and looks along the back from behind for one side of the ribs or low back sitting higher than the other. A visible rib hump or low-back bulge is a positive screen and is referred to the provider for a spine x-ray, following the school or facility screening protocol. Curves can worsen quickly during the growth spurt, so a brace is used for a moderate curve (about 25 to 40 degrees) while the child is still growing, and a severe curve (over about 45 to 50 degrees) usually needs surgery.

Assessment

Kyphosis and height loss in osteoporosis

Watch

A new upper-back hump with lost height in an older adult suggests vertebral compression fractures from osteoporosis. The nurse measures standing height at checkups and reports a loss of about 0.8 inch (2 cm) since the last measurement, or about 1.5 inches (4 cm) from young-adult height, and asks about new back pain. The nurse teaches fall prevention, calcium and vitamin D, and weight-bearing exercise, because osteoporotic bone can break in a simple fall from standing height.

Assessment

Lordosis of pregnancy

The growing uterus moves the center of gravity forward and deepens the lumbar curve, which causes low back pain and a less steady stance. The nurse teaches low-heeled shoes, pelvic tilt exercises, lifting by bending the knees, and resting on the side, and warns that the change in balance raises the risk of falling.

Health Promotion and Maintenance

Upper limb

5 structures

Upper limb

Carpals: scaphoid

The scaphoid is a boat-shaped wrist bone on the thumb side of the near row of carpals, lying in the floor of the anatomical snuffbox, and it is the carpal bone most often fractured.

Why the exam cares

After a fall on an outstretched hand, the nurse reports snuffbox tenderness even when the first X-ray is normal, because this fracture often does not show at first and a missed one can lose its blood supply. Once the thumb spica splint is on, the nurse checks circulation in the fingers and makes sure the client keeps the repeat-imaging visit.

How to find it

  • Ask the client to extend the thumb away from the hand. The hollow that opens at the base of the thumb, on the back of the wrist, is the anatomical snuffbox.
  • Its thumb-side ridge is two tendons (abductor pollicis longus and extensor pollicis brevis). Its other ridge is one tendon (extensor pollicis longus).
  • The scaphoid lies in the floor of that hollow, with the trapezium just beyond it. The radial pulse can also be felt in the same floor.
  • It sits just past the end of the radius, so it takes the force of a fall on the outstretched hand.

Assessment

Neurovascular checks under the thumb spica

Critical

Swelling under a rigid splint can cut off blood flow and press on nerves in the hand. The nurse checks the fingers for color, warmth, capillary refill, sensation, and movement, compares them with the other hand, and reports numbness, tingling, pale or cold fingers, or pain out of proportion to the injury right away. Before discharge the nurse teaches the client to elevate the hand above the heart, move the fingers often, and return at once for those same signs.

Fracture

Snuffbox tenderness with a normal X-ray

Watch

After a fall on the outstretched hand, the nurse presses gently into the floor of the snuffbox and reports tenderness to the provider even if the film is clear. The nurse expects a thumb spica splint and repeat imaging in about 10 to 14 days, and does not reassure the client that it is only a sprain.

Fracture

Why the follow-up visit matters

Watch

Blood enters the scaphoid at its far end and flows back toward the near end, so a fracture can starve the near piece of bone and it can die (avascular necrosis) or fail to heal. The nurse teaches the client to keep the splint on as instructed even if the wrist feels better, and confirms the follow-up appointment is scheduled and understood.

Reduction of Risk PotentialPhysiological Adaptation
Upper limb

Hand: metacarpals and phalanges

The hand's skeleton beyond the wrist is five metacarpals in the palm, whose rounded heads form the knuckles, and fourteen phalanges in the fingers: two in the thumb and three in each other finger.

Why the exam cares

After a hand is splinted or wrapped, the nurse checks every fingertip and acts right away on a pale, cool finger, slowed capillary refill, or new numbness or tingling, because the splint or swelling can cut off blood flow or press on a nerve. After a closed-fist injury, the nurse also looks for a tooth wound over the knuckle and reports it, because it is treated as a human bite.

How to find it

  • Ask the patient to make a fist: the knuckles that stand out are the heads of the metacarpals.
  • The fifth metacarpal runs along the little-finger edge of the hand to the smallest knuckle.
  • Each finger bends at two joints past the knuckle; the thumb bends at one.
  • The nail bed sits over the last phalanx of each digit and is where capillary refill is checked.

Assessment

Neurovascular check of the fingers

Critical

The nurse checks each fingertip for color, warmth, capillary refill (normally back within about 2 seconds), sensation on both sides, and the ability to bend and straighten, and compares with the other hand. A pale, cool fingertip or refill that has slowed since the last check means poor blood flow: the nurse loosens a tight outer wrap per facility policy and notifies the provider at once. New numbness, tingling, weakness, or pain that keeps rising or is not relieved by the ordered pain medicine is also reported promptly, because the splint or swelling may be pressing on nerves and blood vessels.

Fracture

Boxer fracture

Watch

A punch with a closed fist can break the neck of the fifth metacarpal and flatten the little-finger knuckle. The nurse asks how it happened and inspects the skin over the knuckle; a tooth wound there is reported to the provider because it is treated as a human bite, with cleaning and antibiotics, and can infect the joint. The nurse removes rings before swelling traps them, elevates the hand, and splints as ordered.

Procedure

Splinting in position of function

A resting hand splint holds the wrist slightly extended, the knuckles bent, the fingers gently curled as if holding a can, and the thumb out from the palm, never with the fingers flat, because knuckle joints held straight for a long time stiffen in a shape that cannot grip. A fracture splint may need a different position, so the nurse follows the provider's order. The nurse pads bony points and leaves the fingertips visible for checks.

Reduction of Risk PotentialBasic Care and Comfort
Upper limbHigh yield

Humerus

The humerus is the upper arm bone, running from the ball-shaped head at the shoulder down to the elbow.

Why the exam cares

After a fall on an outstretched arm, the nurse's repeated neurovascular checks catch the dangerous findings early: pain that keeps climbing and worsens when the fingers are stretched, a pale or cold hand in a child with a break just above the elbow, or a wrist that will not lift after a mid-shaft break or a tight cast. The deltoid injection is placed by finding the acromion first, so the needle stays out of the shoulder joint above and away from the radial nerve and brachial artery below.

How to find it

  • The acromion is the bony tip of the shoulder; the deltoid site starts two to three finger-widths below it and stays above the armpit line.
  • The surgical neck sits just below the head and the bumps of the tubercles; it is the usual break point in older adults, and the axillary nerve wraps around it.
  • The radial nerve runs in a groove on the back of the mid-shaft, so a mid-shaft break threatens wrist and finger extension.
  • Just above the elbow the bone thins (the supracondylar region), with the brachial artery and median nerve in front; the ulnar nerve runs behind the inner (medial) knob, the medial epicondyle.

Fracture

Supracondylar fracture in a child

Critical

A child who falls on an outstretched arm can break the humerus just above the elbow, where the brachial artery lies against the bone, so the nurse checks the radial pulse, capillary refill, color, warmth, sensation, and finger movement, and repeats the check after every splint, cast, or position change. A pale, cold hand or a fading pulse means the artery is pinched or injured; pain that keeps climbing despite ordered pain medicine and worsens when the fingers are passively stretched is the early sign of compartment syndrome, where a lost pulse is a late sign the nurse never waits for. For any of these findings the nurse loosens any tight dressing, keeps the arm at heart level rather than raised, and calls the provider at once, because delay can cost the forearm muscle.

Fracture

Proximal humerus fracture in older adults

In bone weakened by osteoporosis, a fall onto the hand or shoulder often breaks the humerus at the surgical neck. The nurse checks the radial pulse, feeling over the outer shoulder and the hand, and finger movement, then supports the arm in a sling. The nurse also starts fall-prevention and bone-health teaching, because the next fall may break a hip.

Nerve

Radial nerve and wrist drop

Watch

A mid-shaft break, a tight splint or cast, or an arm left hanging over a chair edge can press on the radial nerve. The nurse asks the patient to lift the wrist and straighten the thumb, and checks feeling on the back of the hand between the thumb and index finger. A wrist that has newly stopped lifting is reported promptly so the cast or arm position can be corrected before the nerve damage lasts.

Injection site

Deltoid injection site

Watch

The nurse finds the acromion, measures two to three finger-widths down, and injects at 90 degrees into the thickest center of the deltoid, above the armpit line. Too high, the needle can enter the shoulder bursa and joint and cause lasting shoulder pain and stiffness; too low, it risks the radial nerve and brachial artery. The site holds a small volume, about 1 mL in adults, so it is used for vaccines and other small doses, not large or irritating ones.

Reduction of Risk PotentialPhysiological AdaptationPharmacological and Parenteral Therapies
Upper limbHigh yield

Radius and ulna

The two bones of the forearm, running from elbow to wrist, with the radius on the thumb side and the ulna on the little-finger side.

Why the exam cares

A fall on an outstretched hand commonly breaks the wrist end of the radius, and the nurse's job after casting is to catch compartment syndrome early with repeated neurovascular checks. The radial artery runs along the lower radius, so this is also where the nurse counts a pulse and checks hand circulation before an arterial stick.

How to find it

  • The radial styloid is the bony knob on the thumb side of the wrist; the radial pulse is felt on the palm side, just toward the middle of the wrist from it, pressed gently against the radius.
  • The ulnar styloid is the bump on the little-finger side of the wrist, at the lower end of the ulna.
  • The point of the elbow (olecranon) is the top of the ulna. The ulnar nerve runs in a groove behind the bony knob on the inner side of the elbow, which belongs to the humerus (medial epicondyle), just beside the olecranon. Bumping that spot is what makes the little finger tingle.

Fracture

Colles fracture

Watch

A fall on the outstretched hand breaks the radius near the wrist and tips the fragment backward, so the wrist looks like a dinner fork from the side. The nurse splints the arm as found, elevates it, applies ice, removes rings before swelling traps them, and checks the fingers for color, warmth, capillary refill, sensation, and movement before and after reduction. In an older adult this break often points to osteoporosis, so the nurse expects bone-density follow-up and fall-prevention teaching.

Assessment

Cast checks and compartment syndrome

Critical

Each check compares the casted hand with the other hand: capillary refill under about 3 seconds, color, warmth, swelling, numbness, and finger movement. Pain out of proportion to the injury that worsens when the nurse passively stretches the fingers is the earliest sign of compartment syndrome, so the nurse reports it right away, because rising pressure can kill muscle and nerve within hours and a lost pulse is a late sign. While waiting for the provider, the nurse keeps the arm at heart level, not above it, since elevation lowers blood flow into a compartment that is already starved.

Pulse point

Radial pulse and the Allen test

Watch

The nurse counts the radial pulse with two fingertips for 30 seconds and doubles it when the rhythm is regular, or counts a full minute when it is irregular. Before a radial arterial blood gas, the nurse presses both the radial and ulnar arteries while the patient makes a tight fist, has the patient open the blanched hand, then releases only the ulnar artery. Color should return within about 7 seconds; if it does not, the ulnar artery may not supply the hand alone, so that radial artery is not punctured and the nurse notifies the provider.

Reduction of Risk PotentialBasic Care and Comfort
Upper limb

Scapula

The scapula is the shoulder blade, a flat triangular bone on the upper back that lies over ribs 2 to 7 and forms the shoulder socket at its outer corner.

Why the exam cares

Bone muffles breath sounds, so the nurse listens to the back of the lungs between the scapulae and below their lower tips, not over the bone. In a thin patient lying on the back, the scapular ridges are a common place for pressure injuries.

How to find it

  • The spine of the scapula is the hard ridge across the upper back. Its inner end sits about level with the T3 spinous process, and most of the lung heard below it from behind is lower lobe.
  • The inferior angle, the bottom tip, sits at about the T7 spinous process with the arms at the sides. The lung bases lie lower, near T10 in quiet breathing, so the nurse keeps listening below the tip.
  • Asking the patient to fold the arms across the chest pulls both scapulae outward and uncovers more lung between them.
  • The acromion is the bony point at the top of the shoulder, at the outer end of the scapular spine. The nurse measures down from it to find the deltoid injection site.

Auscultation

Posterior lung fields

The nurse sits the patient up with the arms crossed, starts above the scapulae at the apices, and works down between each scapula and the spine, comparing left with right at each level. The nurse finishes below the inferior angles at about T10 for the bases. A stethoscope placed on the bone picks up faint sound that is easy to chart wrongly as diminished breath sounds.

Landmark

Acromion for the deltoid site

The nurse palpates the acromion and measures 2 to 3 fingerbreadths down the outer arm into the thickest part of the deltoid. Injecting too close to the acromion can reach the shoulder joint and cause lasting shoulder injury; injecting too low risks the radial nerve and brachial artery.

Pressure point

Scapular ridges in the supine patient

In a thin, immobile patient lying on the back, the spine and inferior angle of the scapula press into the mattress with little tissue over them. The nurse inspects the upper back at every turn and uses a 30-degree side-lying tilt to take weight off the bone. Keeping the head of the bed at 30 degrees or lower when the condition allows reduces sliding and shear.

Reduction of Risk PotentialBasic Care and Comfort

Lower limb

6 structures

Lower limb

Ankle: malleoli

The malleoli are the two bony bumps of the ankle: the medial malleolus is the lower end of the tibia on the inside, and the lateral malleolus is the lower end of the fibula on the outside.

Why the exam cares

The skin over these unpadded bumps breaks down fast when a patient lies on their side, so the nurse pads and separates them. After a leg injury, splint, or tight dressing, the nurse feels for the pulse just behind the inner bump and treats a lost pulse as an emergency; when a cast covers the ankle, the nurse checks the toes instead.

How to find it

  • The inner and outer ankle bumps; the outer one (lateral malleolus) sits lower and farther back than the inner one (medial malleolus).
  • The posterior tibial pulse is felt just behind and below the medial malleolus, between the bone and the Achilles tendon.
  • Press the back edge and tip of each malleolus; bone tenderness there points to a possible fracture rather than a sprain.
  • In side-lying, the lateral malleolus of the lower leg rests on the mattress and the medial malleoli of the two legs press against each other.

Pressure point

Ankle pressure in side-lying

Watch

The nurse places a pillow between the legs so the inner ankles do not rest on each other, supports the lower leg so the outer ankle does not press into the mattress, and checks the skin over both malleoli at every turn. Non-blanching redness on intact skin there is a stage 1 pressure injury, so the nurse keeps all pressure off that spot.

Assessment

Sprain versus fracture

After a twisted ankle, the nurse presses along the back edge and tip of both malleoli and asks whether the patient could take four steps right after the injury, then checks whether they can take four steps now. Bone tenderness at either malleolus, or being unable to take four steps both right after the injury and at the exam, means an X-ray is needed. Without these findings, a sprain is treated with rest, ice, compression, and elevation.

Pulse point

Posterior tibial pulse

Critical

The nurse feels behind and below the medial malleolus for the posterior tibial pulse and compares both feet; when a cast covers the ankle, this pulse cannot be felt, so the nurse checks the toes' color, warmth, capillary refill, feeling, and movement instead. Pain out of proportion to the injury, pain when the toes are moved passively, numbness, a cool pale foot, or a pulse that was present and is now gone means the nurse keeps the leg at heart level, loosens any tight dressing, and notifies the provider immediately. Pain comes before pulse loss, and lost blood flow or compartment syndrome can permanently damage nerve and muscle within hours.

Basic Care and ComfortReduction of Risk PotentialPhysiological Adaptation
Lower limbHigh yield

Calcaneus (heel)

The calcaneus is the heel bone, the largest tarsal bone, sitting under the talus at the back of the foot where the Achilles tendon attaches.

Why the exam cares

The heel is the second most common site of pressure injury after the sacrum, because a bony prominence under thin padding carries the weight of the leg in bed. The nurse floats the heels off the mattress instead of padding under them, since a heel wound in a patient with diabetes or poor circulation can end in amputation.

How to find it

  • The rounded bony prominence at the back and bottom of the foot, below and behind the ankle bones.
  • The Achilles tendon is the firm cord at the back of the ankle; follow it down to where it attaches on the back of the heel.
  • The posterior tibial pulse is felt just behind the medial malleolus, above the inner side of the heel.
  • In a patient lying on the back, the back of the heel is the point that rests on the mattress.

Pressure point

Float the heels

Watch

Place a pillow or wedge under the full length of the calves so the heels hang free of the mattress with the knees slightly bent, or use a heel-suspension boot; never use a donut ring, which concentrates pressure at its rim. Inspect both heels at least every shift. A persistent non-blanchable deep red, maroon, or purple area over intact skin is a suspected deep tissue pressure injury, so offload it at once and report it.

Fracture

Fall from a height

Critical

Landing on the feet from a height can break one or both heels and, in about 1 in 10 patients, the thoracolumbar spine too, so assess for back pain, check leg sensation and movement, and keep the spine immobilized until it is cleared. Watch the injured foot for compartment syndrome: pain out of proportion to the injury or with passive toe movement, tense swelling, and numbness or tingling. If these appear, keep the foot at heart level instead of raised, remove ice, loosen any tight dressing or splint, and notify the provider immediately, because the trapped pressure cuts off blood flow and fasciotomy is time-critical.

Assessment

Heel skin in diabetes

Neuropathy hides pain and poor circulation slows healing, so check the heels at every diabetic foot exam for color, warmth, dryness, cracks, and calluses, and palpate the posterior tibial and dorsalis pedis pulses. Teach the patient to look at the heels daily with a mirror, to moisturize dry skin but not between the toes, and not to soak the feet. Teach the patient never to use heating pads or hot-water bottles on the feet, because numb skin can burn without warning.

Basic Care and ComfortReduction of Risk PotentialPhysiological Adaptation
Lower limbHigh yield

Femur: head and neck

The femoral head is the ball at the top of the thigh bone that sits in the hip socket, and the neck is the short angled segment that joins it to the shaft.

Why the exam cares

After an older adult falls, a leg that lies shorter and turned outward is the classic sign of a hip fracture, but a nondisplaced fracture can look normal. The nurse keeps that leg still and checks the foot, watches for fat embolism in the first days, and after surgery keeps a new hip in its socket.

How to find it

  • The femoral head lies deep to the femoral pulse, felt midway between the front point of the hip bone and the pubic bone, just below the groin crease; groin pain after a fall points here.
  • From the head, the neck runs down and outward to the greater trochanter, the hard bump on the outer side of the upper thigh.
  • Compare the two legs from the foot of the bed: on the fractured side the leg often lies shorter and the foot rolls outward.

Fracture

Hip fracture presentation

Watch

After a fall, a leg that is shorter and rotated outward, with groin or hip pain and inability to bear weight, points to a hip fracture; a nondisplaced fracture may show none of this, and the patient may still walk. The nurse keeps the patient still, does not try to straighten the leg, checks the foot's pulse, color, warmth, movement, and sensation against the other foot, and gives ordered pain relief. If Buck's skin traction is ordered before surgery, the nurse keeps the weights hanging free and checks the skin under the boot and the foot's circulation and sensation as often as facility policy requires.

Emergency

Fat embolism after a femur fracture

Critical

In the first 24 to 72 hours after a femur fracture, fat from the marrow can travel to the lungs and brain. The nurse watches for sudden shortness of breath, a falling oxygen saturation, new confusion or restlessness, and tiny red-purple spots on the chest, armpits, or neck. The nurse raises the head of the bed, gives oxygen, and calls the provider or rapid response team at once.

Assessment

Avascular necrosis of the femoral head

The vessels that feed the head run up along the neck, so a neck fracture can cut off its blood supply and the bone can die. This is why many displaced neck fractures are treated with a replacement rather than a repair. After a repair, the nurse teaches the patient to report new or worsening groin or hip pain rather than wait it out.

Procedure

Dislocation precautions after hip replacement

Watch

After a posterior-approach hip replacement, the new ball can slip out if the hip bends past 90 degrees, the leg crosses the midline, or the foot turns inward, so the nurse follows the surgeon's precautions: an abduction pillow between the legs, a raised toilet seat and chair, and no crossing the legs or bending forward to reach the feet. Sudden severe hip pain with a leg that suddenly shortens or rotates suggests dislocation; the nurse keeps the patient still and calls the surgeon.

Physiological AdaptationReduction of Risk PotentialBasic Care and Comfort
Lower limbHigh yield

Foot: metatarsals and phalanges

The forefoot and toes are built from five long metatarsals, numbered 1 to 5 from the big-toe side, and fourteen phalanges: two in the big toe and three in each of the other toes.

Why the exam cares

The toes are where a patient with diabetes loses feeling first, and the ball of the foot takes heavy pressure, so a blister nobody notices can become an ulcer, an infection, and an amputation. The pulse, capillary refill, and sensation the nurse checks here show whether the foot is getting blood and whether the patient can feel an injury.

How to find it

  • Dorsalis pedis pulse: top of the foot, just to the outer side of the big toe's long extensor tendon, over the gap between the first and second metatarsals.
  • Ball of the foot: the metatarsal heads, a main weight-bearing area and, with the pad of the big toe, a common site of diabetic foot ulcers.
  • Toenail beds: press until the nail blanches, release, and time how fast the color returns; compare with the other foot.
  • Monofilament test sites: the pad of the big toe and the skin under the metatarsal heads, avoiding callus, scar, or open skin.

Assessment

Diabetic foot check and teaching

Watch

The nurse looks at the tops and tips of the toes, between the toes, the sole, and the heel for cracks, blisters, redness, and calluses, and tests sensation with a 10-gram monofilament while the patient's eyes are closed. The patient is taught to check both feet every day with a mirror, never walk barefoot, wear well-fitted shoes and clean dry socks, trim nails straight across, test bath water with an elbow or a thermometer, and avoid heating pads. A patient who cannot feel heat or a pebble in the shoe will not notice harm, so any sore or color change is reported early.

Pulse point

Dorsalis pedis pulse

Critical

The nurse checks both feet and compares them after a leg cast or surgery, after a procedure through the groin artery, and in peripheral artery disease, and marks a hard-to-find pulse with a pen. The artery is absent or hard to feel in some healthy people, so a pulse never found is checked with the posterior tibial pulse behind the inner ankle bone and a Doppler. A pulse that was present and then disappears means blood flow may be blocked: the nurse checks the other foot and the groin site for bleeding or swelling, and notifies the provider at once.

Emergency

Compartment syndrome after a cast or injury

Critical

The nurse checks the toes for color, warmth, capillary refill under about 3 seconds, sensation, and movement, and compares with the other foot. Early warnings are pain out of proportion to the injury, pain not relieved by the ordered pain medicine, pain that gets worse when the toes are passively stretched, and numbness or tingling. Pale, cool, or pulseless toes, or toes the patient cannot move, are late signs. The nurse keeps the limb at heart level rather than elevated, does not apply ice, loosens any tight dressing, notifies the provider immediately, and prepares for the cast to be split or for a fasciotomy.

Fracture

Metatarsal fracture

A dropped object, a twisted ankle, or repeated impact can break a metatarsal. The nurse elevates the foot, applies ice, and checks the toes' circulation and sensation. Most breaks, including a chip pulled off the very base of the fifth metatarsal, heal in a stiff-soled shoe or walking boot. A Jones fracture is different: it sits just past the base of the fifth metatarsal, where the base meets the shaft, and that spot has a poor blood supply. The nurse reinforces non-weight-bearing orders because it may heal slowly or need surgery.

Health Promotion and MaintenanceReduction of Risk PotentialPhysiological Adaptation
Lower limbHigh yield

Patella

The kneecap is a small sesamoid bone inside the quadriceps tendon that glides in a groove on the front of the lower femur.

Why the exam cares

The tendon just below the kneecap is where the nurse tests the deep tendon reflex in a woman receiving magnesium sulfate for preeclampsia. A fading knee jerk is the first sign of magnesium toxicity, and a brisk one with clonus warns that an eclamptic seizure may be near.

How to find it

  • The flat bone on the front of the knee that moves side to side when the leg is straight and relaxed.
  • The patellar tendon runs from its lower edge to the bump at the top of the shin (tibial tuberosity); the reflex hammer strikes the tendon in the gap between them.
  • With the knee bent over the edge of the bed and the lower leg hanging free, the tendon is slightly stretched and easiest to test.

Assessment

Knee jerk during magnesium sulfate

Critical

The nurse checks the knee jerk (normal is 2+) every hour or per protocol, along with respiratory rate and urine output, because magnesium dampens nerves in order: reflexes fade before breathing slows, and the kidneys are the only way it leaves the body. If the reflex is absent, respirations fall below 12, or urine output drops below 30 mL/hr, the nurse stops the infusion, notifies the provider, and has calcium gluconate, the antidote, ready. With an epidural in place the knee jerk may be blunted, so the nurse tests the biceps or brachioradialis reflex instead.

Assessment

Hyperreflexia and clonus in preeclampsia

Critical

A brisk 3+ or 4+ knee jerk, especially with ankle clonus (rhythmic beats of the foot after a quick upward flex), means the brain is irritable and an eclamptic seizure may be near. The nurse reports it right away with the blood pressure, headache, visual changes, and upper abdominal pain, and starts seizure precautions per facility policy, with suction and oxygen ready and a quiet, dim room. Magnesium sulfate is given to prevent the seizure, not to lower the blood pressure.

Emergency

Patellar dislocation

A twist on a planted foot with the knee bent can shift the kneecap to the outer side of the knee, most often in teens and young athletes; the knee is held bent and the kneecap is visibly out of place. The nurse keeps the leg in the position found, applies ice, and checks pulses, color, warmth, sensation, and movement below the knee, rechecking after any splint. The nurse does not push the kneecap back, because forcing it can break off bone or cartilage; putting it back is the provider's job.

Pharmacological and Parenteral TherapiesReduction of Risk PotentialPhysiological Adaptation
Lower limbHigh yield

Tibia and fibula

The two bones of the lower leg: the thick tibia (shin bone) on the inner side carries the body's weight from knee to ankle, and the thin fibula on the outer side carries little weight but anchors muscles and forms the outer ankle knob.

Why the exam cares

After a tibial fracture or a new cast, the nurse checks the foot's circulation, feeling, and movement on schedule, because swelling trapped in the leg's tight muscle compartments can kill muscle and nerve within hours. The nurse also keeps pressure off the outer knee, where a cast edge or an outward-rolled leg can crush the nerve that lifts the foot.

How to find it

  • The sharp front edge of the tibia and the flat inner surface beside it lie just under the skin, from the bump below the kneecap down to the inner ankle knob (medial malleolus).
  • The tibial tuberosity is the bump a few centimeters below the kneecap where the patellar ligament (often called the patellar tendon) attaches.
  • The fibular head is the knob on the outside of the leg just below the knee, tucked under the outer edge of the tibia's upper end at about the level of the tibial tuberosity; the common peroneal nerve wraps around the bone just below it.
  • The outer ankle knob (lateral malleolus) is the lower end of the fibula; the inner ankle knob belongs to the tibia.

Emergency

Compartment syndrome

Critical

After a tibial fracture, crush injury, or tight cast, pain out of proportion to the injury, pain that gets worse when the nurse gently stretches the toes, pain opioids do not relieve, and new numbness or tingling mean pressure in a muscle compartment is choking off blood flow; a lost pulse is a late sign, and the nurse does not wait for it. The nurse keeps the leg at heart level, not raised, because elevation lowers the blood pressure feeding the compartment, loosens tight dressings or wraps, and notifies the provider at once. A cast is split or bivalved on the provider's order, and the definitive treatment is surgical fasciotomy.

Nerve

Common peroneal nerve at the fibular neck

Watch

The common peroneal (fibular) nerve wraps around the neck of the fibula just under the skin, so a cast edge, knee brace, bed rail, or a leg left rolled outward can compress it and cause foot drop and numbness on the top of the foot. The nurse checks that the patient can pull the foot and toes up and feel the top of the foot, pads over the fibular head, uses a trochanter roll to keep the leg from rolling outward, and reports new weakness or numbness promptly.

Fracture

Open tibial fracture

Critical

The tibia lies just under the skin, so its fractures often break through it and let bacteria reach the bone. The nurse controls bleeding with direct pressure, covers the wound with a sterile dressing, does not push bone ends back in or try to straighten the leg, splints it as found, and checks pulses, color, warmth, sensation, and movement below the injury before and after splinting. The nurse keeps the patient NPO for surgery and expects IV antibiotics and a tetanus status check.

Procedure

Intraosseous access in the upper tibia

Watch

When a vein cannot be reached quickly in an emergency, an intraosseous needle may be placed in the flat inner surface of the upper tibia just below the knee, at the spot the device's instructions specify; a fractured tibia or a bone with a recent IO attempt is not used. The nurse watches the site and calf for swelling or firmness, which means fluid is leaking into the tissue, then stops the infusion and reports it, because the leak can itself cause compartment syndrome.

Physiological AdaptationReduction of Risk Potential

Sources

SourceLicense
BodyParts3D, © The Database Center for Life Science licensed under CC Attribution 4.0 InternationalThe 3D plates. Modified: element meshes merged per structure, simplified, compressed, and recoloured for the web.CC-BY-4.0
OpenStax Anatomy and Physiology 2e (CC BY 4.0)Informed the anatomical facts. The prose is original to this portal.CC-BY-4.0
MedlinePlus / NIHPublic Domain (US Gov)
Nursing Nerds editorialEvery sentence in the atlas entries, each passed through independent clinical review.Original