The nurse is caring for a patient who has undergone major abdominal surgery. 4 hours post op Urine output 45 ml BP 120/80 mmHg HR 90 beats/min Weight 97.5 kg 24 hrs post op urine output 20 ml/hr for past 2 hours BP 100/50 mm Hg HR 110 beats/m Weight 99 kg According to the 4 hours post-op assessment data and the 24 hour assessment data, the nurse understands that the weight change corresponds to an

A. Fluid retention of 1.5 liters: A weight gain of 1 kg corresponds to approximately 1 liter of fluid. The patient’s weight increased from 97.5 kg to 99 kg, indicating a gain of 1.5 kg, which reflects about 1.5 liters of fluid retained. This is supported by decreasing urine output, hypotension, and tachycardia, suggesting fluid imbalance. B. Fluid loss of 0.5 liters: This is inconsistent with the patient’s weight gain and declining urine output, which point toward fluid retention rather than loss. C. Equal intake and output due to insensible losses: Equal intake and output would result in relatively stable weight, not a 1.5 kg increase within 24 hours. D. Fluid loss of 1.5 liters: A fluid loss of this amount would cause weight reduction, not weight gain, and would not align with the observed increase in body weight.