Correct Answer: C

Rationale: Providing frequent mouth care is the priority for a patient with peritonitis who is NPO and complaining of thirst.

Correct Answer: C

Rationale: Coffee-ground emesis is a sign of upper gastrointestinal bleeding that occurred approximately 2 hours earlier. It results from the breakdown of blood in the stomach due to digestive enzymes, giving it a coffee-ground appearance. Choice A is incorrect because coffee-ground emesis indicates older, partially digested blood, not fresh active bleeding. Choice B is incorrect as gastric lavage is not indicated for coffee-ground emesis. Choice D is incorrect because a transfusion of packed RBCs is not the immediate management for this presentation.

Correct Answer: A

Rationale: For an 8 oz (240 ml) can of feeding, mix 60 ml of water to achieve the required concentration.

Correct Answer: A

Rationale: An ileostomy would have a malodorous, enzyme-rich, caustic liquid output that is yellow, green, or brown.

Correct Answer: D

Rationale: After a gastric vagotomy, the gastric pH increases as a result of reduced acid secretion.