Comparison of Transparent Retractable Extension Device and Narrow Band Imaging on Colorectal Adenoma Detection

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00765180

Enrollment

200

Registered

2008-10-02

Start date

2007-01-31

Completion date

2010-12-31

Last updated

2015-11-18

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

Conditions

Colorectal Cancer Screening

Keywords

colonoscopy, hood, NBI

Brief summary

The investigators previously reported that colonoscopy with a transparent retractable extension (TRE) device improved the adenoma detection rate without affecting intubation and withdrawal times. On the other hand, colonoscopy using narrow band imaging (NBI) is expected to lead to higher rate s of adenoma detection. The investigators compared the effects of TRE device on colorectal adenoma detection with those of NBI.

Interventions

DEVICETRE vs. NBI

TRE NBI

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

DIAGNOSTIC

Masking

SINGLE (Investigator)

Eligibility

Sex/Gender

ALL

Age

20 Years to 100 Years

Healthy volunteers

Yes

Exclusion criteria

* Age less than 20 years old * Pregnant * American Society of Anesthesiologists class III and IV * Overweight (body weight \> 100 kg) * Allergic to the drugs used or its components (soybeans or eggs) * Poor bowel preparation * Previous colorectal surgical resection

Design outcomes

Primary

Measure	Time frame
Colorectal adenoma detection rate	after colonoscopy

Secondary

Measure	Time frame
Procedure time, complication	after colonoscopy

Countries

Japan

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026