Cholangitis other diagnostic studies
|
Cholangitis Microchapters |
|
Diagnosis |
|---|
|
Treatment |
|
Case Studies |
|
Cholangitis other diagnostic studies On the Web |
|
American Roentgen Ray Society Images of Cholangitis other diagnostic studies |
|
Risk calculators and risk factors for Cholangitis other diagnostic studies |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Amandeep Singh M.D.[2]
Overview
Endoscopic retrograde cholangiopancreatography (ERCP) is considered a gold standard test for diagnosing biliary obstruction. Magnetic resonance cholangiopancreatography (MRCP) and percutaneous transhepatic cholangiography (PTCA) are the most sensitive techniques to correctly determine the underlying cause and level of biliary obstruction in patients with acute cholangitis when ERCP fails.
Other Diagnostic Findings
Endoscopic retrograde cholangiopancreatography (ERCP)
ERCP is the preferred imaging method for diagnosing biliary obstruction as it is both diagnostic and therapeutic. ERCP involves the use of endoscopy to pass a small cannula into the bile duct. Radiocontrast is then injected to opacify the duct, and x-rays are taken to get a visual impression of the biliary system. Findings on an ERCP suggestive of/diagnostic of acute cholangitis include:
- A protuberant ampulla from an impacted gallstone in the common bile duct, or the frank extrusion of pus from the common bile duct orifice.[1]
Percutaneous transhepatic cholangiography (PTCA)
In case the ERCP is unsuccessful, percutaneous transhepatic cholangiography (PTCA) can be used to allow access to the biliary tree.[2][3]
- The PTCA procedure involves inserting a needle through the skin and placing a thin tube into a duct in the liver.
- Dye is injected through the tube and x-rays are then taken.
For diagnostic purposes, ERCP has now generally been replaced by MRCP. ERCP is only used first-line in critically ill patients in whom delay for diagnostic tests is not acceptable.
- If the index of suspicion for cholangitis is high, an ERCP is typically done to achieve drainage of the obstructed common bile duct.[1]
Magnetic resonance cholangiopancreatography (MRCP)
- Useful in patients with postcholecystectomy and in patients with non-conclusive ERCP.[4]
- This safe and painless test is increasingly used for diagnosis.
- The only disadvantage is that smaller stones can be missed on a MRCP.[1]
References
- ↑ 1.0 1.1 1.2 Kinney TP (2007). "Management of ascending cholangitis". Gastrointest. Endosc. Clin. N. Am. 17 (2): 289–306, vi. doi:10.1016/j.giec.2007.03.006. PMID 17556149.
- ↑ ATKINSON M, HAPPEY MG, SMIDDY FG (1960). "Percutaneous transhepatic cholangiography". Gut. 1: 357–65. PMC 1413224. PMID 13684978.
- ↑ "Primary Sclerosing Cholangitis". Retrieved April 20 2016. Check date values in:
|accessdate=(help) - ↑ Gallix BP, Aufort S, Pierredon MA, Garibaldi F, Bruel JM (2006). "[Acute cholangitis: imaging diagnosis and management]". J Radiol (in French). 87 (4 Pt 2): 430–40. PMID 16691174.