Question

Following a surgical procedure to remove a gallstone from the common bile duct, a 63-year-old woman with type 2 diabetes and jaundice goes into acute renal in the immediate postoperative period. A laboratory finding that supports a diagnosis of acute tubular in this patient is

A. Urinary sodium concentration > 30 mEq/L
B. Urine to plasma creatinine ratio < 20:1
C. Urinary osmolality equal to plasma osmolality
D. Casts and cellular debris in urine sediment
E. All of the above

Answer 1

The laboratory finding that supports a diagnosis of acute tubular necrosis in the immediate postoperative period for a patient with type 2 diabetes, jaundice, and acute renal failure is the presence of casts and cellular debris in the urine sediment.

Step-by-step explanation:

The laboratory finding that supports a diagnosis of acute tubular necrosis in the immediate postoperative period for a patient with type 2 diabetes, jaundice, and acute renal failure is option D: Casts and cellular debris in urine sediment.

In acute tubular necrosis, there is damage to the renal tubules, leading to the presence of casts and cellular debris in the urine.

Options A, B, and C are not supported findings for acute tubular necrosis.