Wachsberg R H
Department of Radiology, University Hospital, Newark, NJ 07103.
J Ultrasound Med. 1994 Aug;13(8):617-21. doi: 10.7863/jum.1994.13.8.617.
The attachments and adjacent structures of the extrahepatic bile duct may not move uniformly throughout the respiratory cycle, potentially affecting the diameter of the common bile duct. This study was performed to evaluate possible respiratory variation in extrahepatic bile duct diameter. Thirty consecutive subjects with maximal anteroposterior common bile duct diameter of 5 mm or greater were studied. Inspiratory increase in ductal diameter exceeding 1 mm was noted in 11 subjects (37%), eight without biliary obstruction. Awareness of this normal phenomenon may avert sonographic misdiagnosis of common bile duct obstruction, particularly during fatty-meal sonography.
肝外胆管的附属结构和相邻结构在整个呼吸周期中可能不会均匀移动，这可能会影响胆总管的直径。本研究旨在评估肝外胆管直径可能存在的呼吸变化。对30名连续入选的胆总管前后径最大达5mm或更大的受试者进行了研究。11名受试者（37%）观察到吸气时胆管直径增加超过1mm，其中8名无胆道梗阻。认识到这种正常现象可避免超声对胆总管梗阻的误诊，尤其是在脂肪餐超声检查期间。
