Comparison of Newer Colonoscopy Devices With Standard Forward Viewing (SFV) Colonoscopes in Daily Practice

Study Overview
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Brief Summary
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Retrospective data analysis of comparsion of 3 types of colonoscopes in daily practice (FUSE Full spectrum colonoscopy with 330° angle of view vs Pentax standard HD-colonoscopes and Pentax plus Endocuff): medical device of the category IIb (CE-marked device used within its intended purpose)

Detailed Description
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From March 2015 through February 2017 (phase A) patients referred for ambulant colonoscopy in a private Swiss gastroenterologist's practice were alternatingly allocated to one of the two endoscopy theatres. One equipped with a FUSE® endoscopy system from Endochoice (later: Boston Scientific, nA/FUSE®=1044 examinations), the other with an EPKi Processor and Pentax i10 colonoscopes (nA/Pentax=934 examinations). In March 2017 a second doctor joined the practice, but did not contribute to the study. These organizational changes required randomization to be switched from per-patient alternation to per-day alternation in phase B from March 2018 through September 2019. In phase B the FUSE® system was unchanged (nB/FUSE®=1386 examinations), while the Pentax i10 colonoscopes were additionally equipped with Endocuff® (nB/Endocuff®=750 examinations). Patients with contraindica-tion against Endocuff® (known or found diverticular stenosis) were excluded from the study (nB/removed=127). Patients were given their appointments to any free slot throughout the week without stratification. The study and data analysis was consented by the ethical committee EKNZ Ethikkom-mission Nordwest- und Zentralschweiz (Project-ID 2019-01643). All procedures were performed by one experienced endoscopist (board certified 2004) under nurse assisted propofol sedation (NAPS). Baseline characteristics, age, sex, BMI, smoking habits, diabetes as well as quality of bowel prepara-tion (measured by BBPS score) and indication for colonoscopy (screening, surveillance, diagnostic, such as diarrhea, bleeding, persistent abdominal pain) were assessed. Amount of sedatives, other medications given during endoscopy (e.g. Buscopan®) and time for the endoscopy e.g. time to ile-um, retraction time (pullback time minus intervention time) and time for intervention were measured by the assistant with a stopwatch. These parameters, polyp counts, size and their localisation (entered in a table and to an anatomical scheme), and satisfaction for all parts of the examination (bowel prep and overall satisfaction) were realtime entered to the database by a tablet computer. The data entry was done coded. Only the main investigator could subdue each single patient. Statistics were done with a professional statistics, the co-author Dr. Leiner

Official Title
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Comparison of Newer Colonoscopy Devices With Standard Forward Viewing (SFV) High Definition Colonoscopes in Daily Practice

Conditions
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Adenoma Detection Rate

Intervention / Treatment
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* Device: difference between colonoscopes


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: all patient fit for ambulatory colonoscopy Exclusion Criteria: for Endocuff stricturing divertculosis
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: FUSE<br>wide angle colonoscope | Device: difference between colonoscopes<br>* patients have been randomly assigned for colonoscopy with FUSE or HD SFV endoscopes with or without Endocuff<br>|
| Other: HD Pentax i10 colonoscopes<br>SFV instrument | Device: difference between colonoscopes<br>* patients have been randomly assigned for colonoscopy with FUSE or HD SFV endoscopes with or without Endocuff<br>|
| Other: Endocuff<br>Cuff on SFV | Device: difference between colonoscopes<br>* patients have been randomly assigned for colonoscopy with FUSE or HD SFV endoscopes with or without Endocuff<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Adenoma detection rate | adenoma counts | within 45 minutes of examination | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| time for endoscopy (time to ileum, withdrawal and intervention time). Medication, Satisfaction on VAS | different endoscopy characteristics | within 45 minutes of examination |