Correct Answer: C

Rationale: In a client with left-sided heart failure, monitoring serum creatinine is crucial to evaluate kidney function and fluid balance. Elevated creatinine levels can indicate impaired kidney function, which is common in heart failure due to decreased cardiac output and renal perfusion. Serum sodium levels (choice A) are important but are more closely associated with fluid balance and heart failure exacerbation. Serum potassium (choice B) is also important to monitor, but it is more closely linked to cardiac arrhythmias rather than kidney function. Serum glucose levels (choice D) are significant but are not the priority for monitoring in left-sided heart failure.

Correct Answer: A

Rationale: The correct answer is A: 'Have you had any difficulty starting your urinary stream?' This question is the most relevant as difficulty starting urination can indicate an obstruction, which aligns with the client's current condition of postrenal obstruction causing acute renal failure. Choice B is incorrect as a history of kidney stones may not be directly related to the current obstruction. Choice C, asking about daily fluid intake, is not specific to the current issue of postrenal obstruction. Choice D inquires about previous urinary tract infections, which are not directly related to the current acute renal failure caused by postrenal obstruction.

Correct Answer: B

Rationale: An increase in a large amount of dark red blood in the chest tube collection chamber may indicate active bleeding. The nurse should notify the healthcare provider immediately to address the situation promptly and prevent further complications. Documenting the findings without taking immediate action could delay necessary interventions. Checking the tube for kinks or dependent loops is a good practice but not the priority when dealing with a potentially life-threatening situation like active bleeding. Increasing the suction without healthcare provider's orders can lead to complications and is not appropriate in this scenario.

Correct Answer: B

Rationale: Reporting fresh blood in the urine is crucial following a TURP procedure as it may indicate a complication such as bleeding or clot formation. This symptom requires immediate attention to prevent further complications. Choices A, C, and D are important aspects of post-TURP care, but identifying and reporting fresh blood in the urine take precedence due to its association with potential serious complications.

Correct Answer: C

Rationale: The correct answer is C: Serum potassium of 3.2 mEq/L. A low serum potassium level in a client with DKA is concerning due to the risk of cardiac arrhythmias. Kussmaul respirations (choice A) are a compensatory mechanism for metabolic acidosis in DKA. A blood glucose level of 300 mg/dl (choice B) is elevated but expected in DKA. Positive urine ketones (choice D) are a classic finding in DKA and not as concerning as low serum potassium.