Chang V H, Cunningham J J, Fromkes J J
AJR Am J Roentgenol. 1985 Apr;144(4):753-5. doi: 10.2214/ajr.144.4.753.
The maximum diameter of the extrahepatic bile duct visible on cholesonograms was measured immediately before and immediately after endoscopic retrograde cannulation and injection of the biliary and pancreatic ducts (ERCP) in 24 patients. Sonographic bile duct diameter increased by 3 mm or more in nine patients, all of whom had had a previous cholecystectomy. Bile duct diameter was unchanged in the remaining 15 patients, six of whom had had cholecystectomy. The technical performance of ERCP alone will alter bile duct diameter in a significant proportion of patients having endoscopic cannulation of the biliary tree. This is particularly so for patients who have had their gallbladders removed. The true diameter of the extrahepatic bile duct cannot be determined in many patients by simple measurement of images obtained at ERCP, even when corrections are made for radiographic magnification.
在24例患者中，于内镜逆行胆管及胰管插管造影（ERCP）之前及之后即刻测量胆囊造影所见肝外胆管的最大直径。9例患者超声检查胆管直径增加3mm或更多，所有这些患者均曾接受过胆囊切除术。其余15例患者胆管直径未变，其中6例曾接受过胆囊切除术。仅ERCP操作本身就会使相当一部分接受胆管内镜插管的患者胆管直径发生改变。对于已切除胆囊的患者尤其如此。即使对X线放大率进行校正，在许多患者中，通过简单测量ERCP所获图像也无法确定肝外胆管的真实直径。
