9 Minutes for Colonoscopy Withdrawal

Summary

A withdrawal time of at least 6 minutes has been considered to be necessary to guarantee the adenoma detection rate and the critical quality criterion of colonoscopy. However, several large observational investigations demonstrated that 9 minutes will be in favor of higher adenoma detection rate and lower risk of interval colorectal cancer, when compared with 6-minute withdrawal. Meanwhile, a few studies also indicated that no significant benefit were observed in longer withdrawal time. Up to now, no randomized controlled trials have been conducted to give a definitive conclusion. Therefore, we performed a multicenter, prospective, randomized Controlled trial to compare adenoma detection rate of 6-minute and 9-minute withdrawal in colonoscopy.

Conditions

• Colon Polyps
• Colorectal Adenomas

Interventions

PROCEDURE

9-minute withdrawal

Patients in 9-minute withdrawal group will be carefully observed for 9 minutes during the colonoscopy withdraw

PROCEDURE

6-minute withdrawal

Patients in 6-minute withdrawal group will be carefully observed for 6 minutes during the colonoscopy withdraw

Sponsors & Collaborators

• No.85 Hospital, Changning, Shanghai, China

  collaborator OTHER

• The Second Clinical Medical College of Jinan University

  collaborator OTHER

• Qinghai People's Hospital

  collaborator OTHER

• Shaanxi Provincial People's Hospital

  collaborator OTHER

• Shanghai 8th People's Hospital

  collaborator OTHER

• Yantaishan Hospital of Yantai City

  collaborator UNKNOWN

• First Affiliated Hospital of Harbin Medical University

  collaborator OTHER

• Changzhi People's Hospital

  collaborator OTHER

• Ningbo Medical Center Li Huili Eastern Hospital

  collaborator UNKNOWN

• The Third People's Hospital of Datong

  collaborator UNKNOWN

• The First Affiliated Hospital of the Medical College, Shihezi University

  collaborator UNKNOWN

• The First Affiliated Hospital of Dalian Medical University

  collaborator OTHER

• Seventh Medical Center of PLA Army General Hospital

  collaborator OTHER

• Changhai Hospital

  lead OTHER

Principal Investigators

• Li Zhaoshen, M.D · Changhai Hospital

Study Design

Allocation

RANDOMIZED

Purpose

DIAGNOSTIC

Masking

NONE

Model

PARALLEL

Eligibility

Min Age

40 Years

Max Age

85 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2018-01-20

Primary Completion

2019-07-01

Completion

2019-07-06

Countries

• China

Study Locations