The nurse is caring for a patient who has undergone major abdominal surgery. The nurse notices that the patient's urine output has been less than 20 mL/hour for the past 2 hours. It is 0200 in the morning
The patient's blood pressure is 100/60 mm Hg, and the pulse is 110 beats per minute. Previously, the pulse was 90 beats per minute with a blood pressure of 120/80 mm Hg. The nurse should: a. contact the provider and expect an order for a normal saline bolus.
b. wait until 0900 when the provider makes rounds to report the assessment findings.
c. continue to evaluate urine output for 2 more hours.
d. ignore the urine output, as this is most likely postrenal in origin.
A
Most prerenal causes of AKI are related to intravascular volume depletion, decreased cardiac output, renal vasoconstriction, or pharmacological agents that impair autoregulation and GFR (Box 15-2).8 These conditions reduce the glomerular perfusion and the GFR, and the kidneys are hypoperfused. For example, major abdominal surgery can cause hypoperfusion of the kidney as a result of blood loss during surgery or as a result of excess vomiting or nasogastric suction during the postoperative period. The body attempts to normalize renal perfusion by reabsorbing sodium and water. If adequate blood flow is restored to the kidney, normal renal function resumes. Most forms of prerenal AKI can be reversed by treating the cause.
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