EFFECT OF BILE DIVERSION ON FECAL FAT AND NITROGEN EXCRETION

Abstract

Fecal fat and nitrogen excretions were detd. in dogs before and after cholecystonephrostomy when the mixed diet contained from 0 to 51 g. fat per day and 0 to 12 g. crude fiber per day. Tests were of 5 day''s duration. In 6 normal dogs daily total fat and percentage of split fat excreted in the feces remained constant and independent of fat or fiber intake. In 9 bile fistula dogs daily fecal fat excretion increased in linear fashion as dietary fat was increased. The mathematical relationship between fat intake and fecal fat excretion was interpreted as indicating that fecal fat consists of a constant amt. of fat equal to that excreted on a fat-free diet plus 58% of the dietary fat. The ratio of split to total fecal fat was significantly higher in bile fistula dogs than in normal dogs. Fecal N excretion was related to the amt. of crude fiber in the diet in normal and in bile fistula dogs, and was independent of dietary fat, proteins, or of bile diversion.