# 9 Minutes for Tandem Colonoscopy Withdrawal

> **NCT04797065** · NA · COMPLETED · sponsor: **Changhai Hospital** · enrollment: 733 (actual)

## Conditions studied

- Colon Polyp
- Colorectal Adenoma

## Interventions

- **PROCEDURE:** 6-minute then 9-minute withdrawal
- **PROCEDURE:** 9-minute then 6-minute withdrawal

## Key facts

- **NCT ID:** NCT04797065
- **Lead sponsor:** Changhai Hospital
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2021-03-01
- **Primary completion:** 2021-11-05
- **Final completion:** 2021-12-05
- **Target enrollment:** 733 (ACTUAL)
- **Last updated:** 2022-02-01

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## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04797065

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04797065, "9 Minutes for Tandem Colonoscopy Withdrawal". Retrieved via AI Analytics 2026-06-25 from https://api.ai-analytics.org/clinical/NCT04797065. Licensed CC0.

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