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Radiology. 1975 Jul;116(1):49-52.

Contraction of the canine gallbladder in different degrees of common bile duct obstruction.

Abstract

C-terminal octapeptide of cholecystokinin was administered at six dose levels, 4-128 ng/kg, by 184 intravenous injections to three mongrel dogs under several pressure conditions of the biliary system. Gallbladder contraction was monitored radiographically. A good, dose-dependent contraction response resulted with intraductal pressures of 0 and 10 cm water. At 20 cm water, a markedly reduced and dose-independent response occurred. No contraction response was found with an intraductal pressure of 30 cm water. This animal experimental work suggests that in man, a contraction response of 30% or more may rule out significant common bile duct obstruction.

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