Clin Endosc.  2023 Nov;56(6):795-801. 10.5946/ce.2022.289.

The efficacy of a novel integrated outside biliary stent and nasobiliary drainage catheter system for acute cholangitis: a single center pilot study

• Kuraoka N
• Ujihara T
• Kasahara H
• Suzuki Y
• Sakai S
• Hashimoto S

• KMID: 2547902
• DOI: http://doi.org/10.5946/ce.2022.289

Abstract

Background/Aims
Endoscopic biliary drainage is the gold standard treatment for cholangitis. The two methods of biliary drainage are endoscopic biliary stenting and nasobiliary drainage. A novel integrated outside biliary stent and nasobiliary drainage catheter system (UMIDAS NB stent; Olympus Medical Systems) was recently developed. In this study, we evaluated the efficacy of this stent in the treatment of cholangitis caused by common bile duct stones or distal bile duct strictures.
Methods
We conducted a retrospective pilot study by examining the medical records of patients who required endoscopic biliary drainage for cholangitis due to common bile duct stones or distal bile duct strictures, and who were treated with a UMIDAS NB stent, between December 2021 and July 2022.
Results
Records of 54 consecutive patients were reviewed. Technical and clinical success rates were 47/54 (87.0%) and 52/54 (96.3%), respectively. Adverse events were observed in 12 patients, with six patients experiencing pancreatitis as an adverse event, following endoscopic retrograde cholangiopancreatography (ERCP). Regarding late adverse events, five cases of biliary stent migration into the bile duct were observed. Disease-related death occurred in one patient.
Conclusions
The outside-type UMIDAS NB stent is an efficacious new method for biliary drainage and can be applied to many indications.

Keyword

Biliary tract; Cholangitis; Endoscopic biliary stenting; Endoscopic nasobiliary drainage

Figure

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  Fig. 1. The outside type UMIDAS NB stent (Olympus Medical Systems). The UMIDAS NB stent is an integrated outside biliary stent and nasobiliary drainage catheter system in which endoscopic biliary stenting and endoscopic nasobiliary drainage are integrated. The endoscopic nasobiliary drainage catheter (Olympus Medical Systems) is a straight-tip shape. The biliary plastic stent has a Tannenbaum-shaped flap at its center.

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  Fig. 2. Deployment of the UMIDAS NB stent (Olympus Medical Systems). The UMIDAS NB stent is inserted into the bile duct after cholangiography during endoscopic retrograde cholangiopancreatography.

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