In fluid overload, which symptom is most likely to be present in the client?

In the context of fluid overload, edema is the most likely symptom to be present in the client. Fluid overload occurs when there is an excess of fluid in the body, which can lead to an increase in intravascular volume. This excess fluid can cause swelling in various parts of the body, particularly in the extremities, abdomen, and lungs, depending on the severity of the overload and the individual's health status.

Edema develops because the increased volume of fluid in the bloodstream raises hydrostatic pressure in the capillaries, leading to the leakage of fluid into the interstitial spaces. This can be particularly evident in individuals with heart or kidney problems, where fluid regulation is impaired. Consequently, edema is a clear and common clinical manifestation of fluid overload, making it the correct choice in this scenario.

The other symptoms mentioned—decreased urine output, dry mucous membranes, and hypotension—are more likely associated with fluid deficit or dehydration rather than fluid overload. In fluid overload, urine output may even increase initially due to renal response to excess fluid, and dry mucous membranes typically indicate inadequate hydration. Hypotension is less common in fluid overload as increased fluid volume usually leads to higher blood pressure rather than lower.