A Syndrome of Apparent Renal Failure.

Pseudo-azotemia is the syndrome of hypercreatininemia and hyperkaliemia without a change in glomerular filtration rate or structure of the kidney. A 57-year-old vulnerable woman with learning difficulties experienced an intraperitoneal bladder rupture in the absence of a pelvic fracture after a fall. It is suspected that the blunt force compression of a distended bladder situated above the bony protection of the pelvis resulted in delayed intraperitoneal bladder rupture. Urinary ascites resulted in pseudo-azotemia because of urinary creatinine reabsorption across the peritoneum. This "apparent" renal failure is fully reversible when diagnosis and treatment are prompt, with normalization of abnormal laboratory-investigation results often within 24 hours.