Percutaneous Transhepatic Cholangiography Drainage

Introduction to PTC Drainage

A PTC drain is a catheter placed through the skin and liver directly into the bile ducts to provide external drainage of bile when the normal biliary pathway is obstructed or when endoscopic access has failed, according to the World Journal of Emergency Surgery 1.

PTC serves dual diagnostic and therapeutic purposes: it can identify the exact location and nature of bile duct injuries or obstructions while simultaneously providing biliary decompression through catheter drainage 1, 2.
The transhepatic approach is preferred because it reduces the risk of bile leak, allows the drain to remain in place for longer periods, and leads to quicker maturation of a drainage tract 3.

ERCP remains the first-line treatment for biliary decompression in moderate to severe acute cholangitis, with success rates exceeding 90% and mortality rates below 1%, as recommended by Praxis Medical Insights 4.
PTC becomes the preferred option when ERCP cannot access the biliary tree, such as in patients with surgically altered anatomy, unsuccessful biliary cannulation, or anatomically inaccessible papilla 5.
In cases of ERCP failure, PTC allows for an extraluminal percutaneous endoscopic rendezvous procedure with stent placement to restore bile duct continuity 1.

Bile duct injuries following cholecystectomy when ERCP has failed to manage the leak or stricture can be treated with PTC drainage 1, 2.
Biliary strictures that cannot be accessed endoscopically, particularly in liver transplant patients, may require PTC drainage 6.

The transhepatic route is technically preferred except in patients with severe liver disease and coagulopathy, as it decreases risks of bile leak and portal vessel injury but carries risks of pneumothorax and parenchymal bleeding 3.
PTC can be technically challenging when intrahepatic bile ducts are not dilated, making needle access more difficult 1.
Catheter placement success rates reach approximately 90-97%, with technical failure occurring due to small gallbladder lumen, thin walls, or porcelain gallbladder 3.

PTC carries substantial risks, including biliary peritonitis from bile leakage into the abdominal cavity 1, 5.
Hemobilia and peritoneal hemorrhage from vascular injury are potential complications of PTC 1, 5.
Cholangitis and sepsis from bacterial contamination can occur with PTC 1.
Pneumothorax is a risk when using the transhepatic approach 5.
Liver abscesses and hematoma formation are potential complications of PTC 5.
Catheter-related complications, including dislodgement, obstruction from duodenobiliary reflux, and patient discomfort from external drainage, can occur 5.

Drainage duration typically ranges from 3-6 weeks to allow for tract maturation before catheter removal 3.
Cholangiography should be performed 2-3 weeks after placement before drain removal to confirm biliary tree patency and absence of obstruction 3.
Patients with diabetes, ascites, long-term steroid therapy, or malnutrition require longer drainage periods as these conditions hinder tract maturation 3.

Do not use PTC as first-line therapy when ERCP is feasible, as this exposes patients to unnecessary complications with higher morbidity than endoscopic approaches, according to Praxis Medical Insights 4, 5.
Avoid attempting PTC in patients with severe coagulopathy without correction, given the high bleeding risk 3.
Do not remove catheters prematurely without confirming tract maturation via cholangiography, as this increases bile leak risk 3.
Recognize that PTC cannot visualize ducts upstream or downstream from complete obstructions, limiting its diagnostic utility compared to MRCP 1.

Bloody or serosanguineous drainage from a percutaneous transhepatic biliary drainage (PTBD) catheter is a sign of hemobilia and warrants prompt evaluation for possible vascular injury, pseudo‑aneurysm formation, or catheter malposition. 7
Purulent or cloudy drainage from a PTBD catheter indicates biliary infection (cholangitis) and requires immediate bile culture and adjustment of antimicrobial therapy. 7
Any sudden change in drainage character—including the appearance of blood, pus, or complete cessation of flow—should be considered a complication and prompts urgent imaging (e.g., cholangiography or CT) and appropriate intervention. 7

Routine cholangiography is recommended 2–3 weeks after PTBD placement and before catheter removal to verify patency of the biliary tree and to ensure that no residual obstruction remains. 8
Catheter removal should not be based solely on the visual color of the drainage; a confirmatory cholangiogram must be performed to document cystic duct patency and exclude bile leaks prior to removal. 8