cholangiography


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cholangiography

 [ko-lan″je-og´rah-fe]
x-ray examination of the bile ducts, using a radiopaque dye as a contrast medium. In the intravenous method, the dye is administered intravenously and is excreted by the liver into the bile ducts. X-ray films are taken at 10-minute intervals as the dye is excreted via the cystic, hepatic, and common bile ducts into the intestinal tract. The excretion is usually completed within 4 hours. Preparation of the patient for the intravenous method requires restriction of fluids to concentrate the dye and may also include cleansing of the intestinal tract on the day prior to the examination with a laxative or enema so that fecal material and gas will not obscure the biliary tract.

Sometimes cholangiography is done after surgery of the gallbladder and biliary tract. In this method the radiopaque dye is injected directly into a tube that has been left in the biliary tract since the time of surgery. Films are taken immediately after the dye is injected. If no obstruction is present, the biliary structures fill readily and rapidly empty into the intestinal tract.

When it is necessary for the surgeon to locate gallstones or other obstructive conditions at the time that surgery is being performed, the dye may be injected directly into the bile ducts. Films are taken in the operating room, and obstructions not otherwise discernible can be located and corrected while the patient is still anesthetized.

A patient who is jaundiced cannot undergo either intravenous cholangiography or oral cholecystography. An alternative route for the injection of the contrast dye and visualization of the biliary system is percutaneous transhepatic cholangiography. Under fluoroscopic control, a needle is introduced through the skin and into the liver where the contrast material is deposited. Obstructed and distended bile ducts can then be visualized. After visualization the ducts can be drained via the needle.
Percutaneous transhepatic cholangiography. The aspirating needle is passed through the patient's skin and liver tissue until the tip penetrates one of the hepatic ducts. Radiopaque medium is then instilled into the biliary tree to enhance radiographic visualization. From Malarkey and McMorrow, 2000.
fine needle transhepatic cholangiography (FNTC) transhepatic cholangiography performed by means of a very fine, highly flexible steel needle (skinny needle).
percutaneous transhepatic cholangiography see cholangiography.
transhepatic cholangiography cholangiography after introduction of radiopaque medium into the biliary system by percutaneous puncture of a bile duct.
transjugular cholangiography cholangiography after catheterization of a hepatic vein via the internal jugular vein in the neck and entry into a bile duct by percutaneous puncture across the wall of the hepatic vein.

chol·an·gi·og·ra·phy

(kō-lan'jē-og'ră-fē),
Radiographic examination of the bile ducts with contrast medium.
[chol- + G. angeion, vessel, + graphō, to write]

cholangiography

(kō-lăn′jē-ŏg′rə-fē)
n.
X-ray examination of the bile ducts after the administration of a radiopaque contrast medium.

cho·lan′gi·o·graph′ic (-ə-grăf′ĭk) adj.

cholangiography

Imaging Oral, IV or percutaneous administration of radiocontrast excreted into the bile tract, to detect gallstones or visualize bile ducts. See Percutaneous transhepatic cholangiography.

chol·an·gi·og·ra·phy

(kō-lan'jē-og'ră-fē)
Radiographic examination of the bile ducts using a contrast medium.
[chol- + G. angeion, vessel, + graphō, to write]

cholangiography

X-ray or other imaging examination of the bile ducts, usually after a fluid substance opaque to radiation has been introduced. The main object of cholangiography is to show stones in the bile ducts and gall bladder. The method may be done by direct injection through the skin into the liver (percutaneous, transhepatic cholangiography) or, by way of a flexible endoscope, through the bile duct opening in the duodenum (endoscopic retrograde cholangiography).

Cholangiography

Radiographic examination of the bile ducts after injection with a special dye.
References in periodicals archive ?
Darcy, "Management of bleeding after percutaneous transhepatic cholangiography or transhepatic biliary drain placement," Techniques in Vascular and Interventional Radiology, vol.
Intraoperative biliary imaging modalities, such as IOC, laparoscopic ultrasonography, dye cholangiography, or near-infrared fluorescence cholangiography, may serve as a good adjunct to recognize an aberrant bile duct or even possible BDI when uncertain.
Haber, "Endoscopic retrograde cholangiography, sphincterotomy, and gallstone extraction via gastrostomy," Gastrointestinal Endoscopy, vol.
Abbreviations ABS: Anastomotic biliary stricture ERC: Endoscopic retrograde cholangiography LT: Liver transplantation.
Nakazawa et al., "Small bile duct involvement in IgG4-related sclerosing cholangitis: Liver biopsy and cholangiography correlation," Journal of Gastroenterology, vol.
Laparoscopic cholecystectomy was performed in all cases without intraoperative cholangiography.
Lee et al., "Differential diagnosis of sclerosing cholangitis with autoimmune pancreatitis and periductal infiltrating cancer in the common bile duct at dynamic CT, endoscopic retrograde cholangiography and MR cholangiography," European Radiology, vol.
By presenting this case, we wish to emphasize the importance of timely conversion and execution of intraoperative cholangiography in all cases when identification of the structures of Calot's triangle is not clear enough.
Traditionally, intraoperative cholangiography (IOC) has been very useful for the detection of such biliary tree anomalies [1, 3].
Biliary drainage was restored by day 3 via percutaneous transhepatic cholangiography.