Correct Answer: A

Rationale: The correct answer is A. Hypokalemia increases the risk for digoxin toxicity, which can lead to serious dysrhythmias. Therefore, with a low potassium level, the nurse should immediately alert the healthcare provider about the patient being on oral digoxin. Choices B, C, and D do not pose as much concern with the given potassium level. However, further assessment is still required for these medications.

Correct Answer: C

Rationale: The 25% dextrose solution is hypertonic. Shrinkage of red blood cells can occur when solutions with dextrose concentrations greater than 10% are administered IV. Blood glucose testing is not more accurate when samples are obtained from a central line. The infection risk is higher with a central catheter than with peripheral IV lines. Hypertonic or concentrated IV solutions are not given rapidly.

Correct Answer: B

Rationale: The correct answer is to check the patient's blood pressure. Given the patient's symptoms of frequent, watery stools, there is a concern for fluid volume deficit. Assessing the blood pressure helps determine the patient's perfusion status, which is crucial in managing fluid volume deficits. While obtaining baseline weight, drawing blood for serum electrolyte levels, and asking about extremity numbness or tingling are important assessments, checking the blood pressure takes precedence as it provides immediate information on the patient's circulatory status.

Correct Answer: C

Rationale: The decrease in peripheral edema indicates an improvement in the patient's protein status. Edema is caused by low oncotic pressure in individuals with low serum protein levels. Good skin turgor is an indicator of fluid balance, not protein status. A low hematocrit could be caused by poor protein intake. Blood pressure does not provide a useful clinical tool for monitoring protein status.

Correct Answer: A

Rationale: The correct answer is A. An alert, older patient can self-assess for signs of dehydration like dry mouth. This instruction is appropriate as it encourages the patient to respond to early signs of dehydration. Choice B is incorrect because the thirst mechanism decreases with age and feeling thirsty may not accurately indicate the need for fluids. Choice C is incorrect as many older patients prefer to limit evening fluid intake to enhance sleep quality. Choice D is incorrect because an older adult who is lethargic or confused may not be able to accurately assess their need for fluids.