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Endoscopic Biliary Radiofrequency Ablation of Malignant Distal Common Bile Duct Strictures

NCT01721174 · Status: TERMINATED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 42

Last updated 2018-01-26

No results posted yet for this study

Summary

Malignant bile duct obstruction is a common sequela of pancreatic cancers or distal bile duct cancers, and its development can hinder the use of chemotherapy, decrease patient quality of life, and decrease survival. To relieve obstructive jaundice as a result of the obstruction, endoscopic stent placement is usually required. The use self-expandable metal stents (SEMSs) have been shown to result in a longer patency times as compared with plastic stents. However, despite improvements in materials and stent design, stent obstruction still occurs in 13% to 44% of the patients. Tumor in-growth is the most common mechanism of stent obstruction.

Recently, the use of endoscopic biliary radiofrequency ablation (EBRFA) have been described in patients suffering from inoperable malignant distal common bile duct (CBD) obstruction. The procedure uses heat energy to cause local tumour tissue death, resulting in re-opening of the bile duct lumen. The procedure has the potential of reducing the rate of stent obstruction after SEMS and also prolonging survival. The safety profile appears to be comparable that of placement of SEMS alone without added complications (\<10%). The aim of the current study is to compare the efficacy of EBRFA with the addition of SEMS to SEMS alone in a randomized controlled trial.We hypothesize that the application of EBRFA can reduce recurrent biliary obstruction after SEMS.

Conditions

Interventions

PROCEDURE

SEMS only

The SEMS (Niti-S biliary uncovered metallic stent; Taewoong Medical, Korea) would be placed.

PROCEDURE

EBRFA and SEMS

The radiofrequency ablation (RFA) catheter would be placed under fluoroscopic guidance across the biliary stricture. The Habib EndoHPB (EMcision UK, London, United Kingdom) radiofrequency ablation catheter is a bipolar RFA probe that is 8F (2.6 mm), 1.8 m long, compatible with standard (3.2-mm working channel) side-viewing endoscopes, and passes over 0.035-inch guidewires. The catheter has 2 ring electrodes 8 mm apart with the distal electrode 5 mm from the leading edge, providing local coagulative necrosis over a 2.5-cm length. Depending on the length of the stricture, sequential applications would be applied to complete treatment throughout the length of the stricture without significant overlap of treated areas. An uncovered SEMSs (Niti-S biliary uncovered metallic stent; Taewoong Medical, Gimpo City, Korea) would be placed after 2 sessions of EBRFA.

Sponsors & Collaborators

  • Chinese University of Hong Kong

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2012-11-30
Primary Completion
2017-12-31
Completion
2017-12-31

Countries

  • Hong Kong

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01721174 on ClinicalTrials.gov