Hypokalemia-associated paralysis and metabolic acidosis in a patient with bilateral ureterosigmoidostomy.

Ureterosigmoidostomy is a urological intervention performed to treat various conditions such as invasive bladder cancer, bladder exstrophy, vesicovaginal fistula, or urethral trauma. However, this intervention may lead to several metabolic complications. Here, we report an interesting case with quadriparesis and intestinal paralysis resulting from severe hypokalemia (the serum potassium level, 1.8 mEq/L) and hyperchloremic metabolic acidosis [pH 6.927 and the arterial bicarbonate level, 8.0 mEq/L] in a 65-year-old man who had undergone bilateral ureterosigmoidostomy for bladder cancer 16 years earlier. The abdominal computed tomography scan also showed that massive fluid consisting of the mixture of the diverted urinary stream and feces was accumulated in the dilated distal colon. The treatment with intravenous potassium and sodium bicarbonate administration combined with the drainage of the diverted urinary stream from the distal colon resulted in the restoration of hypokalemia and acidosis followed by the improvement of quadriparesis and intestinal paralysis. The underlying mechanism and the treatment of metabolic complications after ureterosigmoidostomy are briefly discussed.