ABSTRACT
If the patient does not pass urine several hours following surgery and, if an indwelling catheter is not already in use, a catheter is passed. A few millilitres of dark concentrate urine, possibly blood stained is obtained and the worst is immediately suspected. The possibilities are:
• Acute renal failure. • Bilateral ureteric obstruction or obliteration. • Bladder or urethral injury. • Catheter problems.
