Correct Answer: A

Rationale: The correct answer is A: Have the patient lie flat for 6 to 8 hours after a lumbar puncture to prevent complications like post-lumbar puncture headache. Lying flat helps maintain CSF pressure and reduce the risk of leakage. B: Keeping the patient from eating or drinking for 4 hours is not necessary after a lumbar puncture. C: Monitoring pedal pulses q4h is irrelevant to post-lumbar puncture care. D: Keeping the head of the bed elevated 30 degrees for 24 hours is not recommended after a lumbar puncture as it may increase the risk of complications.

Correct Answer: D

Rationale: The correct answer is D: Hyperosmolar solutions used primarily to reverse negative nitrogen balance. Rationale: 1. Hyperalimentation solutions are designed to provide essential nutrients intravenously. 2. Hyperosmolar solutions have a higher osmolarity compared to body fluids, providing concentrated nutrition. 3. Negative nitrogen balance occurs when the body breaks down more protein than it synthesizes, requiring additional protein intake. 4. Hyperosmolar solutions can provide adequate protein and nutrients to reverse negative nitrogen balance. Summary: A: Hypotonic solutions do not increase osmotic pressure, but rather decrease it. B: Hypertonic solutions are not primarily used for hydration in this context. C: Alkalizing solutions are not the primary purpose of hyperalimentation and do not directly address cellular sweating.

Correct Answer: C

Rationale: The correct answer is C: Take piroxicam with food or oral antacid. This instruction helps to reduce GI irritation by providing a protective barrier for the stomach lining. Piroxicam is known to cause GI upset due to its effect on prostaglandin synthesis. Taking it with food or an antacid can help minimize this side effect. Choice A (Space the administration every 4 hours) does not address the issue of GI irritation and is not a recommended strategy for preventing this side effect. Choice B (Use the drug for a short time only) is not a direct intervention to prevent GI upset and does not provide guidance on how to manage the side effect when taking the medication. Choice D (Decrease the piroxicam dosage) may not be necessary if the client can manage the side effects with the simple intervention of taking it with food or an antacid.

Correct Answer: A

Rationale: The correct answer is A: Adrenal cortex. Primary hyperaldosteronism is a condition where the adrenal cortex produces too much aldosterone hormone, leading to hypertension. The adrenal medulla secretes adrenaline and noradrenaline, not aldosterone, making option B incorrect. The pancreas secretes insulin and glucagon, not aldosterone, making option C incorrect. Option D is incorrect because the adrenal cortex is responsible for aldosterone secretion in primary hyperaldosteronism.

Correct Answer: A

Rationale: The correct answer is A: fluid volume deficit related to depletion of intravascular volume. Peritonitis causes inflammation of the peritoneum, leading to fluid shifting into the peritoneal cavity, causing hypovolemia. Hypotension and tachycardia are signs of decreased intravascular volume. Rigid abdominal muscles and rebound tenderness indicate peritoneal irritation. Choice B is incorrect because elevated ammonia levels are not associated with the client's symptoms. Choice C is incorrect because increased peristalsis does not explain the client's hypotension and tachycardia. Choice D is incorrect because malabsorption does not align with the client's acute presentation of severe abdominal pain and peritonitis.