Correct Answer: C

Rationale: The correct answer is C. Clients with long-standing diabetes mellitus are at risk for pyelonephritis due to various reasons. Elevated blood glucose levels in diabetes can lead to glucose spilling into the urine, altering the pH and creating a conducive environment for bacterial growth. Neuropathy associated with diabetes can reduce bladder tone and diminish the sensation of bladder fullness, resulting in less frequent voiding and increased risk of stasis and bacterial overgrowth. Increasing fluid intake, particularly water, and voiding regularly can help prevent stasis and microbial overgrowth. Testing urine for ketones and proteins or using tampons instead of sanitary napkins are not effective strategies for preventing pyelonephritis. Keeping the hemoglobin A1c levels below 9% is crucial for managing diabetes, but it alone does not directly prevent pyelonephritis.

Correct Answer: B

Rationale: In this scenario, the client's symptoms of dry mouth, constipation, and inability to void are indicative of anticholinergic side effects, which can be caused by medications like propantheline (Pro-Banthine) commonly used to treat incontinence. The first question the nurse should ask is about the client's medications to determine if they are taking anticholinergic drugs. This information is crucial as it can help differentiate between a simple side effect or a potential overdose. Asking about water intake (Choice A) may be relevant later but is not the priority in this situation. Questioning about laxatives or enemas (Choice C) and past occurrences (Choice D) are not as pertinent initially as identifying the client's current medication status.

Correct Answer: B

Rationale: The normal BUN ranges from 5 to 20 mg/dL. A BUN level of 18 mg/dL falls within this normal range. Values of 25 and 35 mg/dL are elevated, suggesting potential renal insufficiency. Choice A (2 mg/dL) is abnormally low and not indicative of a normal BUN level.

Correct Answer: A

Rationale: The nurse should suspect Fluid Volume Deficit (FVD) in this patient. Signs of FVD include elevated temperature, tachycardia, tachypnea, hypotension, orthostatic hypotension, and cool, clammy skin, which align with the patient's assessment findings. Choices B, C, and D are incorrect. Fluid Volume Excess (FVE) typically presents with bounding pulses, elevated blood pressure, dyspnea, and crackles. Mild extracellular fluid (ECF) deficit usually manifests as thirst. Renal failure commonly results in Fluid Volume Excess (FVE) rather than Fluid Volume Deficit (FVD).

Correct Answer: D

Rationale: The correct answer is D. The greatest risk factor for bladder cancer is a long history of tobacco use, which is reflected in an 86-year-old male with a 50-pack-year cigarette smoking history. Smoking is a well-established risk factor for developing bladder cancer. Choices A, B, and C are not directly linked to an increased risk of bladder cancer. While sexually transmitted diseases, certain occupational exposures, and recurrent urinary tract infections may pose other health risks, they are not specifically associated with an elevated risk of bladder cancer.