Rationales A, and the four wrong first actions
Four cells in a two-by-two grid, each a small vignette with a red strike mark: an antidiarrheal tablet beside a distended colon, a heat pack over a right lower quadrant, a clock face over a vague patient silhouette drawn without a face, and a syringe pushing a blood-filled line.
Item 1 — Answer: 2 Why 2 is right: hematemesis with melena and a pressure of 92/54 is active volume loss, and access plus fluid is the action that stops the loss. Why 1 is wrong: occult blood testing confirms what frank melena already proved and delays resuscitation. Why 3 is wrong: dietary history gathers data a hypotensive patient cannot afford to wait for. Why 4 is wrong: oral intake is withheld when a bleed may go to endoscopy or surgery. The rule: when the patient is losing volume, the first action replaces volume.
Item 2 — Answer: 1 Why 1 is right: blood digested in the small bowel is absorbed as protein, raising blood urea nitrogen while creatinine stays flat. Why 2 is wrong: left lower quadrant tenderness points toward diverticular, lower-tract disease. Why 3 is wrong: hemorrhoids are a lower source, and a known history invites the wrong assumption. Why 4 is wrong: mucus in stool suggests colonic inflammation, not an upper source. The rule: a rising blood urea nitrogen with a flat creatinine is an upper GI bleed until proven otherwise. Values → BOOK 07 · P5.
Item 3 — Answer: 2, 4, 5, 3, 1 Why that order is right: assess and confirm the deterioration, stop anything entering a perforated gut, notify the surgeon because this is an operating room problem, then decompress and cover with antibiotics as prescribed. Why other orders are wrong: antibiotics before notification delays the definitive intervention; the nasogastric tube before surgeon notification treats a symptom while a perforation stays unreported; nothing by mouth before vital signs skips the assessment that justifies the page. The rule: in perforation, notify before you treat, because the treatment is surgery. Teaching page → BOOK 11 · P7.
Item 4 — Answer: 3 Why 3 is right: heat increases perfusion and inflammation at the appendix, and enemas and laxatives raise intraluminal pressure. All three raise rupture risk. Why 1 is wrong: warmth over the appendix is the classic comfort measure that causes harm. Why 2 is wrong: an enema in appendicitis is contraindicated for the same pressure reason. Why 4 is wrong: ambulation is not the issue, and extending the knees increases abdominal tension. The rule: nothing that heats, distends, or propels goes near a suspected appendicitis.
Item 5 — Answer: 2 Why 2 is right: proximal obstruction produces cramping waves, early bilious vomiting, and hyperactive high-pitched sounds above the block. Why 1 is wrong: that cluster describes large bowel obstruction. Why 3 is wrong: painless bright red bleeding describes a lower GI bleed. Why 4 is wrong: pain eased by leaning forward describes pancreatitis. The rule: early vomiting means high, marked distension means low.
Item 6 — Answers: 1, 2, 4 Why 1 is right: carpal spasm with cuff inflation is Trousseau sign, and hypocalcemia in pancreatitis is a severity marker. Why 2 is right: hypocalcemia lowers the seizure threshold. Why 4 is right: Chvostek sign is the paired assessment and confirms the pattern. Why 3 is wrong: it is a true physiologic response to the cuff, but calling it expected ends the assessment. Why 5 is wrong: pancreatitis pain eases with the knees drawn up, not flat, and positioning does not address calcium. The rule: fat saponification consumes calcium, so pancreatitis and tetany belong in the same sentence. Calcium values → BOOK 07 · P4.
Item 7 — Answers: 1, 2, 3, 5 Why 1 is right: asterixis is encephalopathy declaring itself. Why 2 is right: a new sleep-wake reversal is an early encephalopathy sign, not poor sleep hygiene. Why 3 is right: any hematemesis in a cirrhotic is a bleeding varix until proven otherwise. Why 5 is right: hypotension after a large-volume tap is expected enough to anticipate and dangerous enough to report. Why 4 is wrong: an unchanged girth measured at the same landmark is a reassuring trend and needs no call. The rule: in cirrhosis, a change in mental status ranks with a change in blood pressure. Teaching page → BOOK 11 · P4.
Item 8 — Answer: 1 Why 1 is right: for an unvaccinated exposed person with a known positive source, immune globulin gives immediate passive protection while the vaccine series builds active immunity. Why 2 is wrong: immune globulin alone leaves no lasting protection. Why 3 is wrong: that is the hepatitis C answer, where no prophylaxis exists. Why 4 is wrong: hepatitis A vaccine does not protect against hepatitis B. The rule: passive plus active for B, testing only for C.
Item 9 — Answer: Ileostomy Why the ileostomy is right: output leaves proximal to the colon, so water has not been reabsorbed and digestive enzymes are still active. Highest volume, thinnest consistency, greatest skin and dehydration risk. Why ascending is wrong: liquid and high risk, but water reabsorption has begun. Why transverse is wrong: semi-formed output with lower enzyme content. Why descending or sigmoid is wrong: formed output, lowest risk, and the only site where irrigation is an option. The rule: the further from the colon, the wetter and more corrosive the output.
Item 10 — Answers: 1, 2, 3, 6 Why 1 is right: about one eighth of an inch of clearance protects skin without exposing it. Why 2 is right: emptying at one third full prevents the weight that breaks the seal. Why 3 is right: very high output means dehydration risk, and absent output with cramping means obstruction. Why 6 is right: minor bleeding with cleaning is normal mucosa; color change is ischemia. Why 4 is wrong: ileostomies are never irrigated. Why 5 is wrong: high-residue foods are limited early after ileostomy, and chewing does not make them safe. The rule: for a new ostomy, teach output volume, seal care, and stoma color, in that order.
The four wrong first actions
- Giving an antidiarrheal during a severe ulcerative colitis flare, which slows the colon toward toxic megacolon.
- Applying heat to a suspected appendicitis, which raises rupture risk.
- Holding escalation for a cirrhotic who is only "a bit confused," which is encephalopathy declaring.
- Flushing the blood remaining in the tubing after stopping a suspected transfusion reaction, which delivers more of the offending product. That claim is verified against current AABB standards; the surrounding procedure varies by institutional policy.
Margin noteif the action gathers data, ask whether the patient can afford the wait.
Takeawaya distractor is usually a correct nursing action performed at the wrong moment, so the question is almost always about sequence.
Priority frameworks → BOOK 03 · P5.