Drainage Port Location in Percutaneous Cholecystostomy
The drainage port of a percutaneous cholecystostomy tube is located in the gallbladder lumen itself, accessed through either a transhepatic (through liver tissue) or transperitoneal (through peritoneal cavity) puncture route.
Access Routes
The catheter can be placed via two distinct anatomical approaches 1:
- Transhepatic route: The catheter traverses through liver parenchyma before entering the gallbladder
- Transperitoneal route: Direct puncture through the peritoneal cavity into the gallbladder
Transperitoneal Route Safety
The transperitoneal approach is safe and effective, with no cases of bile leak or bile peritonitis reported in systematic analysis 2. This route achieved technical success in 100% of patients with only 5% minor complications (self-resolving hematomas), making it a viable alternative to the traditional transhepatic approach.
Anatomical Access Point
The actual puncture site for ultrasound-guided access is typically through the 8th-12th intercostal space 3. Under ultrasound guidance, the needle traverses either liver tissue or peritoneal space to reach the gallbladder fundus, where the drainage catheter is ultimately positioned with its drainage ports sitting within the gallbladder lumen.
Clinical Context
The drainage port remains in the gallbladder lumen to decompress the organ in patients with acute cholecystitis who cannot undergo immediate cholecystectomy 4, 1. The external portion exits through the abdominal wall, but the functional drainage occurs from ports located inside the gallbladder itself.
Common Pitfall
Do not confuse the external exit site on the abdominal wall with the actual drainage port location—the therapeutic drainage occurs from ports positioned within the gallbladder lumen, regardless of whether transhepatic or transperitoneal access was used.