Over a 30 hour period a patient develops oliguria. Blood work is done & he is found to have a BUN of 26 and serum creatinine of 1.1. What type of problem is most likely?

Prerenal acute kidney injury

Explanation:

Oliguria occurs when there is a sudden decrease in renal blood flow or an obstruction of the outflow of urine. This condition can result in prerenal accute kidney injury which is the most common acute kidney injury (AKI). Prerenal acute kidney injury was formerly called acute renal failure. It occurs when a sudden decrease in the flow of blood to the kidney results to loss of kidney function.

Prerenal acute kidney injury causes the accumulation of waste products like blood urea nitrogen (BUN) and creatinine in the blood and hence alters the kidney's ability to balance fluid in the body.