Supine Starting Position Shortens Cecal Intubation Time But Reduces Endoscopist Comfort: a Prospective Comparative Study of Colonoscopy Positioning Strategies

NCT07772648 | Completed

• 1 other identifier: IRB No: 2024/4599
• Study Type: interventional
• Target: 158
• Locations: 1 country
• Sites: 1

Brief Summary

The main questions it aims to answer are: Does starting colonoscopy in the supine position compared with the left lateral position affect the time required to reach the cecum? Does the starting position affect endoscopist comfort, patient comfort, procedure duration, polyp and adenoma detection, or the need to change the patient's position during the procedure? Participants will be randomly assigned to undergo colonoscopy starting either in the supine position or in the left lateral position. The colonoscopy will otherwise be performed according to standard clinical practice.

Conditions

Colonoscopy (Procedure)

Keywords

Endoscopist ergonomics; Cecal intubation time; Patient positioning

Outcome Measures

Primary Outcomes (2)

• Endoscopist Comfort Score (ECS)

  Endoscopist comfort was assessed using a 100-mm visual analog scale (VAS), converted to a 0-10 numeric score, with higher scores indicating greater comfort.

  Immediately after completion of the colonoscopy

• Patient Comfort Score (PCS)

  Patient comfort was assessed using a 100-mm visual analog scale (VAS), converted to a 0-10 numeric score, with higher scores indicating greater comfort.

  After recovery from anesthesia on the day of the colonoscopy

Secondary Outcomes (7)

• Cecal Intubation Time (CIT)

  During the colonoscopy, from colonoscope insertion to cecal intubation

• Withdrawal Time (WT)

  During the colonoscopy

• Adenoma Detection Rate (ADR)

  Up to 30 days after colonoscopy

• Polyp Detection Rate (PDR)

  During the colonoscopy

• Requirement for Patient Repositioning

  During the colonoscopy

Study Arms (2)

Supine Position

EXPERIMENTAL

Participants assigned to this arm underwent colonoscopy starting in the supine position.

Procedure: Colonoscopy Starting Position

Left Lateral Position

ACTIVE COMPARATOR

Participants assigned to this arm underwent colonoscopy starting in the left lateral position

Procedure: Colonoscopy Starting Position

Interventions

Colonoscopy Starting Position PROCEDURE

Participants were assigned to undergo colonoscopy starting either in the supine position or in the left lateral position according to randomization. The assigned position was used at the beginning of the procedure. Patient repositioning during colonoscopy was permitted when clinically required to facilitate colonoscope advancement or completion of the procedure.

Left Lateral Position; Supine Position

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Adults aged 18 years or older. Scheduled to undergo screening colonoscopy. No history of colorectal cancer. No history of colorectal surgery.

You may not qualify if:

• Failure to achieve cecal intubation. Inflammatory bowel disease. Inadequate bowel preparation, defined as a Boston Bowel Preparation Scale (BBPS) score \<2.

Sponsors & Collaborators

• Sisli Hamidiye Etfal Training and Research Hospital: lead

Study Sites (1)

Şişli Hamidiye Etfal Training and Research Hospital

Istanbul, Istanbul, 34371, Turkey (Türkiye)

Location

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: OTHER
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: General Surgeon, MD

Study Record Dates

• First Submitted: August 13, 2026
• First Posted: August 19, 2026
• Study Start: March 1, 2025
• Primary Completion: March 31, 2025
• Study Completion: December 5, 2025
• Last Updated: August 19, 2026

Record last verified: 2024-11

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)