Establishment of a Sprague-Dawley rat model of hepatolithiasis based on common bile duct catheterization

Figure 2 Catheter assembly. A: Schematic of the 20-cm silicone tube tip: 45° bevel cut, side hole within 3 mm of the tip, and 4-mm sleeve mounted 8 mm from the tip with threaded 5-0 Mersilk suture; B: Components from left to right: Finished silicone tube assembly with guidewire, 1-mL syringe with needle, microsurgical curved forceps, and microsurgical needle holder; C: Method for fitting the 4-mm silicone sleeve onto the 20-cm tube; D: Appearance of the completed sleeve assembly; E: Complete catheter tip before insertion, with guidewire in place.