Which symptom is associated with fluid overload in patients with renal failure?

Fluid overload in patients with renal failure is primarily indicated by decreased urine output. This occurs because the kidneys are unable to effectively filter and excrete excess fluid and waste products from the body due to impaired function. As the kidneys struggle to manage fluid balance, the body retains more water, leading to edema and increased fluid volume in the circulatory system.

When fluid overload is present, patients may also experience symptoms such as hypertension and respiratory issues due to fluid accumulation in the lungs. This highlights the importance of monitoring urine output as a key indicator of renal function and fluid status. The other options presented do not align with the physiological responses associated with fluid overload in renal failure; for example, rapid weight loss would indicate dehydration, and increased energy levels would not be expected in a state of fluid imbalance. Similarly, hypotension is generally more related to fluid depletion than excess.