A comparison study between Leaser and LED endoscopy in colonic mucosa

A comparison study between Leaser and LED endoscopy in patients with ulcerative colitis - COLLECT study

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCTs052200073

Enrollment

Registered

2020-10-23

Start date

2021-03-26

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Ulcerative colitis Ulcerative colitis, Inflammatory Bowel Disease

Interventions

Group A: Observation of the large intestine with a laser endoscope (LASEREO system), followed by sigmoid colon observation with an LED endoscope (ELUXEO system) Group B: Observation of the large intes

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1) The ulcerative colitis (UC) patients with extensive type or left-sided type who was diagnosed using clinical, endoscopic, and histologic findings 2) The UC patients who need the colonoscopy for evaluation of mucosal healing or surveillance for dysplasia or colorectal associated cancer 3) The UC patients with clinical remission status (as defined by Lichitiger index less than 4) 4) Age more than 20 years and less than 80 5) Informed consent was obtained from all enrolled UC patients

Exclusion criteria

Exclusion criteria: 1) The ulcerative colitis (UC) patients with proctitis type 2) The UC patients with a history of complications on colonoscopy 3) The UC patients who are already undergoing or have undergone chemotherapy or radiation therapy for a known neoplastic disease 4) The UC patients with any of the following complications; i)Infectious enteritis ii)Colorectal cancer 5) The UC patients with drug allergies to the pretreatment drug for colonoscopy 6) The UC patients who needs a legal representative because of any difficulties to obtain informed consent 7) The UC patients who are considered to be ineligible by the chief investigator and subinvestigators

Design outcomes

Primary

Measure	Time frame
The evaluation of colonic mucosa by LCI classification	—

Secondary

Measure	Time frame
1) The evaluation of colonic mucosa by Mayo endscopic subscore (MES) 2) The evaluation of colonic mucosa by Ulcerative Colitis Endoscopic Index of Severity (UCEIS) 3) The evaluation of colonic mucosa by Munsell color system 4) The evaluation of colonic mucosa by Lab* color system 5) Appearance of adverse events	—

Contacts

Public ContactKazuhiko Uchiyama

University Hospital, Kyoto Prefectural University of Medicine

k-uchi@koto.kpu-m.ac.jp+81-75-251-5508

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026