A nurse is caring for a client who is 9 hours postpartum following a cesarean birth with a quantitative blood loss of 1200 mL. Which of the following findings indicates the client is experiencing a fluid volume deficit?

Choice A rationale 900 mL of urine output since birth (9 hours postpartum) translates to an average of 100 mL/hour. A normal urine output is typically 0.5 to 1 mL/kg/hour, which is usually greater than 30 mL/hour for adults. This indicates adequate renal perfusion and fluid balance rather than deficit. Choice B rationale A temperature of 37.6° C (99.6° F) is considered a low-grade fever. While it could be an early sign of infection, it is not a direct indicator of fluid volume deficit. Normal postpartum temperature may slightly increase due to dehydration or exertion during labor but usually remains below 38°C (100.4°F). Choice C rationale Reports of excessive sweating could be a compensatory mechanism for fever or a response to hormonal changes postpartum, but it is not a primary indicator of fluid volume deficit. In fact, excessive sweating can contribute to fluid loss, but it is not the most definitive sign. Choice D rationale A blood pressure of 80/55 mm Hg, particularly with a quantitative blood loss of 1200 mL, is a significant indicator of fluid volume deficit, specifically hypovolemic shock. Normal postpartum blood pressure is usually similar to pre-pregnancy levels (e.g., 90/60 to 120/80 mmHg). The low blood pressure reflects inadequate circulatory volume compromising tissue perfusion.