Biodegradable Stents in Primary Sclerosing Cholangitis (BSTPSC)

May 27, 2026 updated by: King's College Hospital NHS Trust

Pilot Study of Biodegradable STents in Primary Sclerosing Cholangitis - BSTPSC

In patients with PSC, endoscopic therapy of strictures aims to improve cholestasis by relieving the biliary obstruction via endoscopic biliary dilatation with consideration of plastic stents in strictures refractory to dilatation due to the risk of pancreatitis and cholangitis . Short term stents have been shown to have similar recurrence-free rates compared to dilatation in a randomised control trial; however, this was terminated after interim analysis due to higher rates of serious adverse events in the stent group. The long term benefits are unclear; however, it may lead to improved survival compared to predicted survival. In this group of patients with limited treatment options, biodegradable stents may provide an attractive additional treatment modality in the management of high grade strictures.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Detailed Description

Research hypothesis

The use of biodegradable stents leads to remodelling of high grade strictures in patients with PSC with fewer interventions in comparison to balloon dilation alone with a comparable risk profile to current therapy.

Primary endpoint

Technical success and safety of biodegradable stent placement at ERC

Secondary endpoints

  • Cumulative recurrence -free rate of primary high grade strictures within 12 months
  • Change in symptoms as assessed by the Amsterdam cholestatic complaints score (ACCS)
  • Clinical success is defined by improvement in liver function tests (LFT) by 20% at week 2 and week 12.
  • Improvement in quality fo life as assessed by the Short form-36 (SF-36).
  • Mortality, morbidity, local complications, stricture recurrence, decompensation of liver disease, liver transplantation over 12 months.

Study Type

Interventional

Enrollment (Estimated)

20

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United Kingdom
      • London, United Kingdom, SE5 9RS
        • Recruiting
        • King's College Hospital, London
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • PSC patients with a high grade stricture

Exclusion Criteria:

  • Prior stenting or balloon dilatation within the previous 4 months
  • Signs of bacterial cholangitis as defined by definite cholangitis
  • Change of UDCA therapy within 4 weeks
  • Inability to give informed consent
  • Biliary cirrhosis with Child Pugh score > 8
  • Estimated transplant free survival < 2 years as calculated by Mayo score > 2
  • Suspicion of cholangiocarcinoma, reflected by an imaging study suggestive of metastasis, MRCP with mass lesion with contrast enhancenment, or rise in CA19.9 of > 63 U/ml in the previous 4 months together with an absolute value > 130 U/ml
  • Signs of current malignancy other than basal cell carcinoma
  • Life expectancy < 24 months
  • Women pregnant at the time of screening
  • HIV or acute or chronic hepatitis B or hepatitis C or substance (drug or alcohol) misure within the previous 2 years.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Archimedes stent insertion
Archimedes stent insertion at ERCP for patients with PSC and a HGS
Device: archimedes stent
archimedes stent for HGS

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Deployment of biodegradable stent placement across stricture at ERC in 20 patients
Time Frame: at time of primary ERC
Deployment of stent across the stricture - yes or no
at time of primary ERC

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Cumulative recurrence -free rate of primary high grade strictures within 12 months.
Time Frame: through study completion up to 12 months
has the stricture reoccured (yes or no) at 12 months post ERC and stent
through study completion up to 12 months
Change in symptoms as assessed by the Amsterdam cholestatic complaints score (ACCS)
Time Frame: Post ERC to assessment at 2 weeks and 12 weeks, and at 12 months.
change in pruritus, fatigue, pain and fever
Post ERC to assessment at 2 weeks and 12 weeks, and at 12 months.
Mortality over 12 months.
Time Frame: Within 12 months of primary ERCP
Death related to PSC
Within 12 months of primary ERCP
morbidity related to ERC
Time Frame: within 12 months of ERC
Complications including cholangitis and pancreatitis post ERC
within 12 months of ERC
stricture recurrence post ERC
Time Frame: 12 months post ERC
Development of a stricture in the bile duct
12 months post ERC
Development of ascites post erc
Time Frame: up to 12 months post ERC
development of abdominal ascites post ERC
up to 12 months post ERC
Need for liver transplantation
Time Frame: up to 12 months following ERC
patients who are assessed and then listed for liver transplant
up to 12 months following ERC
Clinical success is defined by improvement in liver function tests (LFT) by 20% at week 2 and week 12.
Time Frame: At week 2 and 12 weeks post ERCP

Change in liver blood tests:

- ALP, AST, ALT, Bilirubin
At week 2 and 12 weeks post ERCP
Change in quality fo life as assessed by the Short form-36 (SF-36
Time Frame: after ERC and assesment at 2 weeks, 12 weeks and 12 months
Change in QoL
after ERC and assesment at 2 weeks, 12 weeks and 12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

King's College Hospital NHS Trust

Investigators

  • Principal Investigator: DEEPAK JOSHI, PhD, King's College Hospital NHS Trust

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

March 1, 2026

Primary Completion (Estimated)

April 1, 2027

Study Completion (Estimated)

April 1, 2027

Study Registration Dates

First Submitted

April 20, 2026

First Submitted That Met QC Criteria

May 20, 2026

First Posted (Actual)

May 26, 2026

Study Record Updates

Last Update Posted (Actual)

May 29, 2026

Last Update Submitted That Met QC Criteria

May 27, 2026

Last Verified

April 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IRAS 336318

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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