Urinary tract infections are the most common healthcare-associated infection.

Choice A Reason: Fluid Volume Overload

Fluid volume overload, also known as hypervolemia, occurs when there is an excess of fluid in the body. This condition is often characterized by symptoms such as swelling (edema), shortness of breath, and high blood pressure. In the context of the patient’s scenario, fluid volume overload would typically present with signs like jugular venous distention, pulmonary congestion, and possibly ascites. The patient’s blood pressure is 109/70, which is not indicative of hypertension typically seen in fluid overload. Additionally, the patient’s lung sounds are clear, which further suggests that there is no pulmonary congestion. The lab results do not show a significant decrease in sodium levels, which might be expected in fluid overload due to dilutional hyponatremia.

Choice B Reason: Fluid Volume Deficit

Fluid volume deficit, or hypovolemia, is a condition where there is a significant loss of body fluids. This can result from severe diarrhea, as seen in the patient’s case. Symptoms of fluid volume deficit include lightheadedness, weakness, and muscle twitching, all of which the patient is experiencing. The patient’s blood pressure is on the lower side (109/70) and he gets lightheaded when standing up, indicating orthostatic hypotension, a common sign of fluid volume deficit. The elevated BUN (30 mg/dL) and creatinine (1.8 mg/dL) levels suggest dehydration and reduced kidney perfusion. The high potassium level (5.6 mEq/L) can be attributed to the body’s attempt to conserve water and sodium, leading to potassium retention. The ECG changes in the T wave and PR interval are consistent with hyperkalemia, which can occur in dehydration and kidney dysfunction.

Choice A: Peripheral pulses
Monitoring peripheral pulses is important for assessing circulation and detecting any signs of vascular complications. However, it is not the most critical assessment for a patient receiving 3% NaCl for hyponatremia. The primary concern with hypertonic saline infusion is the risk of fluid overload and central nervous system (CNS) complications.
Choice B: Urinary output
Monitoring urinary output is essential for assessing kidney function and fluid balance. While it is important, it is not the most critical assessment in this scenario. The primary risks associated with 3% NaCl infusion include rapid changes in serum sodium levels and potential CNS complications.
Choice C: Peripheral edema
Peripheral edema can indicate fluid overload, but it is not the most immediate concern when administering hypertonic saline. The nurse should prioritize monitoring for signs of pulmonary edema and neurological changes, which can occur more rapidly and have more severe consequences.
Choice D: Lung sounds and neurological status
Monitoring lung sounds and neurological status is the most important assessment for a patient receiving 3% NaCl for hyponatremia. Hypertonic saline can cause rapid shifts in fluid balance, leading to pulmonary edema and neurological complications such as osmotic demyelination syndrome. Assessing lung sounds helps detect early signs of fluid overload in the lungs, while monitoring neurological status helps identify any changes in mental status or neurological function that could indicate serious complications.