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Liver and biliary system

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oral cholecystogram (OCG)


dose: 6 x 0.5 gram tablets after evening meal
peak opacification in 14-19 hrs. (13-35% excreted in urine)

    patient selection:
  • bilirubin < 5mg% (unless secondary to hemolysis)
  • contraindicated in serious liver disease
  • relative contraindications in peritonitis, postoperative ileus, acute pancreatitis

    nonvisualization of gallbladder
  • cholecytectomy, obstruction of cystic duct, chronic cholecystitis
  • anomolous position of GB
  • extrabiliary causes
    • fasting state
    • failure to reach absorptive surface of bowel (e.g. malabsorption)
    • deficiency of bile salts (Crohn disease, surgical resection of TI, liver disease, cholestyramine therapy, abnormal communication between biliary and GI tract)


Yong H. Hahn, MD  -  2 February 1995
Last updated:  1 October 2013


 

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Copyright © 2013, Charles E. Kahn, Jr.