Narrow Band Imaging for Diagnosis of Proximal Serrated Polyps

The University of Hong Kong (HKU)

Status: Completed

Conditions: Colonic Neoplasm

Treatments: Other: Narrow band imaging

Study type: Observational

Funder types: Other

Identifiers

NCT01725321

NBI_1

Details and patient eligibility

About

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.

Full 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

Enrollment: 360 patients

Sex: All

Ages: 40+ years old

Volunteers: Accepts Healthy Volunteers

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

Trial design

360 participants in 1 patient group

Narrow band imaging

Description:

Colonoscopy with new narrow band imaging

Treatment:

Other: Narrow band imaging