Correct Answer: C

Rationale: The correct answer is: 'The medication will prevent irritation of the enlarged veins.' Esophageal varices are dilated submucosal veins. The therapeutic action of H2-receptor blockers in patients with esophageal varices is to prevent irritation and bleeding from the varices caused by reflux of acidic gastric contents. While ranitidine can decrease the risk of peptic ulcers, reduce nausea, and help prevent aspiration pneumonia, the primary purpose of H2-receptor blockade in this patient is to prevent irritation and bleeding from the varices, not the other listed effects.

Correct Answer: A

Rationale: In acute severe pancreatitis, there is a risk of respiratory failure as a complication, making the maintenance of normal respiratory function the priority outcome. This patient may develop respiratory issues due to the inflammatory process affecting the diaphragm. While pain control, absence of ongoing pancreatic disease, and fluid/electrolyte balance are crucial, they are secondary to ensuring adequate oxygenation and ventilation to prevent respiratory compromise.

Correct Answer: C

Rationale: In chronic bilateral glaucoma, peripheral visual field loss occurs due to elevated intraocular pressure, leading to the need to turn the head to compensate for the visual field deficit. This symptom is characteristic of advanced glaucoma. Choice A is incorrect as constant blurred vision is a common symptom but not specific to peripheral vision loss in glaucoma. Choice B is incorrect because specific visual field deficits are more common than complete loss on one side. Choice D is incorrect as seeing floaters (specks floating in the eyes) is associated with other eye conditions like posterior vitreous detachment, not glaucoma.

Correct Answer: B

Rationale: The correct answer is when the patient states he has been having diarrhea every day. Persistent diarrhea can lead to dehydration, which can increase the risk of lithium toxicity. The other options, such as a manic episode, severe depression, or rash and pruritus, are not directly associated with an increased risk of lithium toxicity.

Correct Answer: D

Rationale: The low oncotic pressure caused by hypoalbuminemia is a major pathophysiologic factor in the development of edema. In this case, monitoring the albumin level is crucial to assess the patient's fluid balance and potential for edema. While hemoglobin, temperature, and activity level are important parameters to monitor in a patient's assessment, they are not directly associated with the patient's current symptoms of toxic hepatitis and edema development. Therefore, the correct choice is the albumin level.