28-year-old Man in Medicine / Internal Medicine — 28yo Man | Nephrology | SMLE Q#18116
SMLE Question #18116
Medicine / Internal Medicine
Nephrology
Objective: OBJ-NEPH-AKI-PRERENAL-1
Last updated: February 2026
A 28-year-old man recently joined military service and presents after several days of intense outdoor training in hot weather. He reports lightheadedness on standing, generalized muscle cramping, fatigue, and reduced oral intake. Examination shows dry mucous membranes and delayed capillary refill; lungs are clear and there is no peripheral edema. Acute kidney injury due to volume depletion is suspected. Which of the following laboratory findings is most expected?
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