Berci G, Shore J M
Am J Surg. 1979 Jun;137(6):826-8. doi: 10.1016/0002-9610(79)90106-5.
A new S-shaped cystic duct metal cannula was developed and used successfully in 200 cystic duct cholangiograms. It has the advantage of being easy to manipulate because the configuration does not obscure the vision and the resistance is less than that of plastic tubes, facilitating injection with lower pressure. It is much cheaper than the disposable cannulas because it can be reused (autoclaved).
一种新型S形胆囊管金属插管已研发成功，并在200例胆囊管胆管造影中成功应用。它具有易于操作的优点，因为其形状不会遮挡视野，且阻力小于塑料管，便于以较低压力进行注射。它比一次性插管便宜得多，因为它可以重复使用（经高压灭菌）。
