The effect of calcium on hyperoxaluria following jejunoileal bypass in morbid obesity.

In order to investigate the effect on urinary oxalic acid excretion, ten patients with jejunoileostomy for morbid obesity were treated with oral calcium. We found a statistically significant decrease. The investigation suggests that the oral administration of calcium alone is not sufficient, in a dosage of 900 mg daily, to normalize the urinary oxalate excretion. The indications for calcium therapy in this group of patients is discussed.