Surgery>>>>>Patient Safety
Question 16#

The most common cause of postrenal failure is:

a. A clogged urinary catheter
b. An unintentional ligation of ureters
c. A large retroperitoneal hematoma
d. Acute kidney failure

Correct Answer is A

Comment:

Renal failure can be classified as prerenal failure, intrinsic renal failure, and postrenal failure. Postrenal failure, or obstructive renal failure, should always be considered when low urine output (oliguria) or anuria occurs. The most common cause is a misplaced or clogged urinary catheter. Other, less common causes to consider are unintentional ligation or transection of ureters during a difficult surgical dissection ( eg, colon resection for diverticular disease) or a large retroperitoneal hematoma ( eg, ruptured aortic aneurysm).