Narrow Band Imaging for Diagnosis of Proximal Serrated Polyps

Completed

• Conditions: Colonic Neoplasm
• Interventions: Other: Narrow band imaging

• Registration Number: NCT01725321
• Lead Sponsor: The University of Hong Kong

Brief Summary

Although colonoscopy is considered the gold standard for diagnosis of colonic polyps, the missed rate for colonic adenoma ranged from 15-32%. In particular, missed colonic polyps in the right side colon have been suggested to be the cause for interval cancer that developed after a prior negative colonoscopy.

Different endoscopic image enhanced modules like the narrow band imaging (NBI) have been developed to improve colonic polyp detection. However, it remains controversial whether the previous version of NBI helps to improve colonic polyp detection. The new generation colonoscope is equipped with high definition and improved narrow band imaging (NBI) which gives at least twice the viewable distance and contrast. The images obtained are far brighter with better resolution than the previous version. It however remains to be determined whether this enhanced imaging technique could help to improve colonic polyps detection.

Hypothesis:

The new generation NBI increases the detection rate of proximal serrated polyps and reduces the missed rate of all colorectal polyps.

Aims:

* To determine whether the new generation NBI improve the detection rate of proximal serrated polyps.

* To determine whether the new generation NBI improve the detection rate of all colorectal adenoma and polyps.

* To determine whether the new generation NBI reduce the miss rate of colorectal adenoma and polyps.

Detailed Description

Design:

Prospective randomized trial

Inclusion:

• All patients scheduled to have screening or scheduled colonoscopy

Exclusion:

* History of Crohn's or ulcerative colitis

* Surveillance for known polyposis syndrome (FAP or HNPCC)

* Previous colonic resection (except appendectomy)

* Refused consent

* Deranged coagulation profile that preclude polypectomy

Study Timeline

• Study Start: 2012-10
• Study First Submitted: 2012-11-08
• Study First Submitted QC: 2012-11-09
• Study First Posted: 2012-11-12
• Primary Completion: 2013-09
• Study Completion: 2013-10
• Status Verified: 2015-05
• Last Update Submitted: 2015-05-28
• Last Update Posted: 2015-05-29

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 360

Inclusion Criteria

• All patients scheduled to have colonoscopy

Exclusion Criteria

• History of Crohn's or ulcerative colitis
• Surveillance for known polyposis syndrome (FAP or HNPCC)
• Previous colonic resection (except appendectomy)
• Refused consent
• Deranged coagulation profile that preclude polypectomy

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Narrow band imaging	Narrow band imaging	Colonoscopy with new narrow band imaging

Primary Outcome Measures

Name	Time	Method
Detection rate of proximal serrated polyp	During colonoscopy	No. of patients with proximal serrated polyps

Secondary Outcome Measures

Name	Time	Method
Missed rate for proximal serrated polyps	During colonoscopy	Missing rate for proximal serrated polyps

Trial Locations

Locations (1)

Queen Mary Hospital; 🇨🇳 Hong Kong, China