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A prospective randomized comparative trial of covered self-expandable metallic stents with 12mm and 10mm diameters for the distal biliary obstructions in unresectable malignancies

A prospective randomized comparative trial of covered self-expandable metallic stents with 12mm and 10mm diameters for the distal biliary obstructions in unresectable malignancies - A prospective RCT of covered SEMS with 12mm and 10mm diameters for the distal biliary obstructions in unresectable malignancies (BORE Study)

Status
Active, not recruiting
Phases
Phase 2
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000016911
Enrollment
74
Registered
2015-04-01
Start date
2015-04-01
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

unresectable distal biliary malignancies

Interventions

Covered biliary metallic stent with a 10-mm diameter Covered biliary metallic stent with a 12-mm diameter

Sponsors

BORE Study Group
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: Patients 1) with unresectable malignant distal biliary obstruction (> 2 cm distal to the biliary hilum) 2) expected prognosis more than 2 months 3) 20 years old 4) Eastern Cooperative Oncology Group Performance Status (ECOG-PS) < grade 2 5) obtained written informed consent.

Exclusion criteria

Exclusion criteria: 1) patients with massive ascites 2) patients with severe comorbidities in other organs 3) prior biliary SEMS placement 4) patients with surgically altered anatomy 5) difficulty to achieve biliary cannulation during endoscopic retrograde cholangiography 6) intestinal obstruction distal to the ampulla 7) patients with pregnancy 8) patients considered ineligible by attending physicians

Design outcomes

Primary

MeasureTime frame
Stent occlusion rate and dysfunction rate at 180 days after stent deployment

Secondary

MeasureTime frame
1) Stent patency duration 2) Time to recurrent biliary obstruction (TRBO) 3) Overall stent patency rate and function rate 4) Median survival time 5) Stent-related complication rate

Countries

Japan

Contacts

Public ContactMukai Tsuyoshi

Gifu Municipal Hospital Department of Gastroenterology

tsuyomukai@yahoo.co.jp058-251-1101

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026