A Study on the Utilization of a Colonoscopic Preparation Meal for Gastric Residue Retention in Upper Gastrointestinal Endoscopy after Distal Gastrectomy

A Study on the Utilization of a Colonoscopic Preparation Meal for Gastric Residue Retention in Upper Gastrointestinal Endoscopy after Distal Gastrectomy - CLEAR-G test (Colonoscopic Preparation Meal for Low-residue Endoscopic Assessment after Gastrectomy)

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000055513

Enrollment

Registered

2024-09-17

Start date

2024-04-01

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

Cases after distal gastrectomy

Interventions

Before performing upper gastrointestinal endoscopy (EGD) on patients after distal gastrectomy, they will be asked to consume a colonoscopic preparation meal (ClearThru). Patients will be instructed to

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Cases with gastric residue observed during EGD after distal gastrectomy. Cases that are 20 years or older at the time of enrollment. Cases where written consent to participate in this study has been obtained from the individual.

Exclusion criteria

Exclusion criteria: Cases with uncontrolled infections. Cases with severe drug allergies. Pregnant women, those with the possibility of pregnancy, or breastfeeding women. Cases with severe mental disorders. Cases deemed inappropriate for the safe conduct of this study by the principal investigator or co-investigators.

Design outcomes

Primary

Measure	Time frame
Gastric residue volume (evaluated by the RGB classification: Residue, Gastritis, Bile)	—

Countries

Japan

Contacts

Public ContactYuriha Aoi

Handa City Hospital Department of Gastroenterology

yurihaiwa.0913@gmail.com0569-22-9881

Outcome results

None listed

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