A nurse is collecting data about the fluid status of four clients. Which of the following clients should the nurse identify as being at risk for fluid volume deficit?

Choice A rationale A client with NPO status for a procedure, while having a temporary reduction in oral fluid intake, is not immediately at high risk for significant fluid volume deficit unless the NPO period is prolonged or they have other contributing factors. The body's regulatory mechanisms can usually compensate for short-term cessation of intake, especially in a normally hydrated individual. Choice B rationale A client with heart failure receiving diuretic therapy, such as loop diuretics, is at significant risk for fluid volume deficit (hypovolemia). These medications intentionally promote the excretion of sodium and water by the kidneys, which can lead to excessive fluid loss if the dosage is too high or fluid intake is insufficient. Choice C rationale A client with end-stage kidney disease typically has impaired fluid excretion and is more prone to fluid volume excess (hypervolemia) rather than deficit, especially between dialysis treatments. Dialysis is used to remove excess fluid and waste products. Choice D rationale A client with gastroenteritis experiences fluid loss through vomiting and/or diarrhea, which increases the risk of deficit. However, if the client is actively receiving oral fluids (oral rehydration solution), this intervention is directly mitigating the fluid volume deficit risk by replacing lost fluids and electrolytes.