A Multi-Center, Prospective Study of Partially Covered WallFlex Biliary Metallic Stent for extrahepatic malignant biliary obstruction(Safety for elderly patients)

A Multi-Center, Prospective Study of Partially Covered WallFlex Biliary Metallic Stent for extrahepatic malignant biliary obstruction(Safety for elderly patients) - A Multi-Center, Prospective Study of Covered WallFlex Biliary Metallic Stent for extrahepatic malignant biliary obstruction(Safety for elderly patients)

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000004456

Enrollment

Registered

2010-11-01

Start date

2010-04-01

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

Malignant biliary obstruction

Interventions

Partialy Covered WallFlex biliary stent

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: :Unresectable extrahepatic malignant biliary obstruction :Not limited by primary disease, age, and sex :Patients with written informed consent

Exclusion criteria

Exclusion criteria: :Patients for whom endoscopic biliary drainage is difficult. :Patients with hilar malignant biliary obstruction :Patients with duodenal obstruction :Patients with severely impaired organ function :Patients without written informed consent :Patients considered ineligible for this study.

Design outcomes

Primary

Measure	Time frame
Stent patency period	—

Secondary

Measure	Time frame
Stent occlusion rate, Stent-related complication rate, Event free survival, overall survival	—

Countries

Japan

Contacts

Public ContactYuji SAKAI

Chiba University Hospital Department of Gastroenterology

sakai4754@yahoo.co.jp

Outcome results

None listed

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