Application of Epidural Needle and Catheter in Minimally Invasive Gallbladder Surgery Angiography

At present, the clinical treatment of benign gallbladder diseases mainly uses minimally invasive surgery, including laparoscopy and endoscopy. In order to reduce the occurrence of residual stones in the bile duct, bile duct damage and biliary fistula after operation, most of the intraoperative imaging is required. Generally, urinary catheters are used in clinical practice. The urinary catheter has no scale and cannot show the depth of insertion, and it is easy to slip out due to unstable fixation. In clinical practice, the author applies epidural puncture needles and catheters to angiography,

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