REFERENCE RANGES FOR GASTROINTESTINAL TRANSIT OF BARIUM-IMPREGNATED POLYETHYLENE SPHERES IN HEALTHY CATS

Commercial barium-impregnated polyethylene spheres (BIPS) were adminis tered to 12 healthy adult cats according to the manufacturer's instruc tions (30 small BIPS and 10 large BIPS to each cat) together with 60 g of a canned food, Radiographs were taken at hourly intervals until se ven hours after feeding, and then at eight, 10, 12, 14, 17, 23 and 30 hours or until all the BIPS had left the stomach and at least 50 per c ent had entered the colon, Six cats were sedated immediately after bei ng fed the BIPS and six cats remained unsedated, For small BIPS (1.5 m m diameter), the gastric transit time (first exit of BIPS from the sto mach) in the sedated cats had a median of 6 hours (range 3 to 8) and i n the unsedated cats a median of 2.5 hours (range 2 to 6), Values for other transit times were not significantly different between the two g roups, and the pooled data revealed a median 50 per Gent gastric empty ing time of 6.4 hours (range 2.5 to 10.9), a complete gastric emptying time of 12 hours (range 6 to 27), an orocaecal transit time (first ap pearance of BIPS in the colon) of 6.5 hours (range 4.0 to 12.0) and a 50 per cent orocaecal transit time of 8.8 hours (range 4.6 to 12.8), T he gastrointestinal transit of large BIPS (5 mm diameter) was signific antly correlated with the passage of small BIPS but, except for the co mplete gastric emptying time, was significantly slower.