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This paper compares two methods of evaluating gall-bladder function after stimulation with cholecystokinin (CCK); One, the echographic method, permits the gall-bladder contraction study by determining variations in face area of the organ. The other, the scintigraphic method (HIDA-CCK test), studies of the gall-bladder emptying registering the decreases of activity by external counts. Out of 20 studies performed: 8 cases presented a contractile response and normal emptying; 7 had an abnormality late initial response (Ti) and contraction and emptying (defined by T1/2) slower than normal.
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