Set A rationales

SET A RATIONALES

Item 1 — Answer: 2 Why 2 is right. A contraction stress test evaluates whether the fetus tolerates the transient reduction in uteroplacental perfusion that a contraction produces. A negative result means adequate contractions occurred and no late decelerations appeared, which is the reassuring outcome. Why 1 is wrong. Late decelerations with at least half of contractions describes a positive test. WRONG PATTERN Why 3 is wrong. Acceleration with movement is the nonstress test criterion, not the contraction stress test criterion. WRONG PATTERN Why 4 is wrong. Inadequate contractions produce an unsatisfactory or equivocal result, which is documented differently. WRONG PATTERN The rule: on a contraction stress test, negative is good news.

Item 2 — Answer: 1, 2, 3, 5 Why 1, 2, 3, 5 are right. New headache unresponsive to medication, visual disturbance, severe persistent right upper quadrant or epigastric pain, and pulmonary edema are all current severe features, along with severe-range blood pressure on two occasions, thrombocytopenia, impaired liver function, and renal insufficiency. Why 4 is wrong. Fetal growth restriction has been removed from the severe-features list; it changes fetal surveillance, not the maternal diagnosis. WRONG PATTERN Why 6 is wrong. Dependent bilateral edema is a common finding in pregnancy and has never been a diagnostic criterion. NONPREGNANT BASELINE The rule: severe features are maternal end-organ findings, and proteinuria is not required to make the diagnosis.

Item 3 — Answer: 1, 2, 3, 5 Why 1, 2, 3, 5 are right. Loss of deep tendon reflexes is the earliest sign of magnesium sulfate toxicity, and it precedes respiratory depression. Respiratory depression, oliguria that will let the level climb because magnesium is renally cleared, and a depressed level of consciousness all require stopping the infusion, notifying the provider, and having calcium gluconate available. Why 4 is wrong. Feeling warm and flushed is an expected effect of the infusion and does not signal toxicity. TREATS THE NUMBER Why 6 is wrong. Dry mouth is an expected effect and is managed with comfort measures. TREATS THE NUMBER The rule: reflexes go before respirations do, so the reflex check is the monitoring that matters.

Item 4 — Answer: 2 Why 2 is right. A gradual decrease whose nadir coincides with the contraction peak, on a baseline of 140 with moderate variability, is an early deceleration from fetal head compression. Early decelerations are benign and require no intervention. Why 1 is wrong. Repositioning and stopping oxytocin is the late-deceleration response applied to a benign pattern. PREMATURE ACTION Why 3 is wrong. A vaginal examination for prolapse belongs to variable and prolonged decelerations, where cord compression is the mechanism. WRONG PATTERN Why 4 is wrong. Oxygen and urgent notification escalate a Category I tracing. PREMATURE ACTION The rule: early decelerations need no intervention, and moderate variability is the reassurance that outranks the deceleration.

Item 5 — Answer: 1, 2, 3, 4 Why 1, 2, 3, 4 are right. Preterm labor management buys time: corticosteroids for fetal lung maturity, magnesium sulfate for neuroprotection at early gestations, tocolysis for roughly forty-eight hours so the steroids can work, and group B streptococcus prophylaxis because the culture status may be unknown at this gestation. Why 5 is wrong. Oxytocin augments labor; the goal here is to delay birth. WRONG PATTERN Why 6 is wrong. Scheduled ambulation is not a management goal in active preterm labor. PREMATURE ACTION The rule: tocolysis exists to let the steroids work.

Item 6 — Answer: 2, 4, 6, 1, 5, 3 Why that order is right. Lateral repositioning relieves aortocaval compression immediately and costs nothing. Stopping oxytocin removes the cause of excessive uterine activity. Fluid restores maternal preload and uterine perfusion. The vaginal examination then evaluates for prolapse and descent. Oxygen is given as an ordered intervention rather than a reflex first move, since current guidance describes limited evidence for routine maternal oxygen. Notification and preparation for operative birth follow once the bedside measures are underway. Why other orders are wrong. Leading with the vaginal examination or with oxygen delays the two interventions that actually restore perfusion. RIGHT ACTION, WRONG ORDER The rule: position, oxytocin, fluid, then assess.

Item 7 — Answer: 2 Why 2 is right. Painless bright red bleeding with a soft, nontender uterus is the classic previa presentation. Continuous fetal and uterine monitoring is a noninvasive first action that protects the fetus while placental location is confirmed by ultrasound. Why 1 is wrong. A digital cervical examination in suspected previa can perforate the placenta and cause catastrophic hemorrhage. It is the harm answer. PREMATURE ACTION Why 3 is wrong. A speculum examination is also withheld until placental location is known. PREMATURE ACTION Why 4 is wrong. Fundal massage is a postpartum atony intervention and has no role in antepartum bleeding. WRONG PATTERN The rule: no cervical examination of any kind in suspected previa until placental location is confirmed.

Item 8 — Answers. Expected adaptation: hemoglobin below prepregnancy value; white cell count above the nonpregnant upper limit without fever; resting heart rate elevated above prepregnancy; mild bilateral dependent ankle edema. Requires follow-up: creatinine at the upper end of the nonpregnant range; unilateral calf pain with swelling, warmth, and erythema. Why the creatinine sorts as follow-up. Glomerular filtration rises in pregnancy, so creatinine should sit below the nonpregnant range. A value at the nonpregnant upper limit represents a real rise and can signal renal involvement in preeclampsia. NONPREGNANT BASELINE Why the calf finding sorts as follow-up. Unilateral pain, swelling, warmth, and erythema is the venous thromboembolism picture in a hypercoagulable patient. MISSES THE TREND Why the other four sort as expected. Hemodilution, physiologic leukocytosis, an elevated resting heart rate from increased cardiac output, and dependent edema from venous compression are all normal adaptations. The rule: score every value against the pregnant baseline, not the nonpregnant one.

Item 9 — Answers. Nadir marked after the contraction peak. Pattern: late deceleration. First nursing action: reposition the client to a lateral position. Why late. The decrease is gradual and the lowest point of the fetal heart rate falls after the peak of the contraction, with recovery after the contraction ends. Why not early. In an early deceleration the nadir coincides with the peak. Marking the nadir under the peak is the single most common error on this item. WRONG PATTERN Why not variable. A variable deceleration has an abrupt onset, reaching nadir in less than thirty seconds, and no fixed relationship to the contraction. WRONG PATTERN Why not prolonged. A prolonged deceleration lasts two minutes or more; this one recovers well before that. WRONG PATTERN The rule: drop a sight line from the contraction peak. If the nadir is to the right of it, the pattern is late.

Item 10 — Answer: 2 Why 2 is right. The trend shows severe-range blood pressure confirmed on repeat, a new headache unresponsive to medication, visual disturbance, epigastric pain, hyperreflexia with clonus, and a falling platelet count. That is preeclampsia with severe features, and seizure prophylaxis with magnesium sulfate is anticipated. Why 1 is wrong. Gestational hypertension by definition has no severe features; this patient has four. MISSES THE TREND Why 3 is wrong. Attributing hyperreflexia, clonus, epigastric pain, and a falling platelet count to anxiety ignores measurable end-organ change. MISSES THE TREND Why 4 is wrong. Elevated blood pressure does not exclude HELLP; hemolysis, elevated liver enzymes, and low platelets can accompany or precede severe hypertension. WRONG PATTERN The rule: read the columns left to right before you read any single value.

PATTERN PANEL. The dominant error in this set is WRONG PATTERN, and it lands hardest on items 1, 4, and 9, where a benign finding is treated as urgent or a reassuring word is read as alarming. The second most common is NONPREGNANT BASELINE on items 2 and 8. If you missed items 4 or 9, reread page 5 before you go on. If you missed item 7, reread page 6. If you missed item 8, reread page 4.

Margin noteseven or better, move on. Six or fewer, reread pages 5 and 6 before page 14. The wrong-pattern chip is the one to count.

Takeawayname the type of mistake you make, not only the number you missed.