This paper is presented to describe a comparatively rare complication following drainage of the common bile duct. On reviewing the literature we found few data on the actual amount of biliary drainage to be expected from a T tube after exploration of the duct. In our experience the average figures for an adult are 300 to 500 cc. per day, with a maximum of 1,500 cc. in an isolated instance. Other investigators have placed a high point at 25 to 30 cc. per kilogram of body weight per day, which for an average person weighing 75 Kg. would amount to 2,250 cc. daily. Walters and his associates1 in their paper on cholorrhagia following prolonged obstruction reported an output of 2,050 cc. in a single day in 1 patient. In the case here presented there was much more abundant drainage, starting at 1,800 cc. on the first postoperative day.