Single arm pilot study to evaluate the effectiveness of oolong tea in upper gastrointestinal endoscopy

Single arm pilot study to evaluate the effectiveness of oolong tea in upper gastrointestinal endoscopy - Single arm pilot study to evaluate the effectiveness of oolong tea in upper gastrointestinal endoscopy

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000040070

Enrollment

Registered

2020-04-06

Start date

2020-04-06

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

Person planning screening upper gastrointestinal endoscopy

Interventions

Drink 100ml of oolong tea 10-15 minutes before endoscopy

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Person planning screening upper gastrointestinal endoscopy

Exclusion criteria

Exclusion criteria: 1)History of pharyngeal, esophageal, stomach, or duodenal surgery 2)History of allergy to oolong tea

Design outcomes

Primary

Measure	Time frame
Mucosal visibility score	—

Secondary

Measure	Time frame
Examination time	—

Countries

Japan

Contacts

Public ContactTetsushi Ishida

Osaka Center for Cancer and Cardiovascular Disease Prevention Department of endoscopy

ishida-te@osaka-ganjun.jp06-6969-6711

Outcome results

None listed

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