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Withdrawal Time and Use of Wide-angle Endoscope to Increase the Adenoma Detection Rate of Screening Colonoscopy

Effect of a Longer Withdrawal Time or of the Use of a Wide-angle Endoscope on the Adenoma Detection Rate of Screening Colonoscopy

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT02985944
Enrollment
1000
Registered
2016-12-07
Start date
2016-06-30
Completion date
2018-12-31
Last updated
2021-01-20

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

Conditions

Colon Polyp, ColoRectal Cancer

Keywords

colorectal cancer, Colon polyp, Colonoscopy, Adenoma detection rate

Brief summary

Colonoscopy outcome is strictly related to the adenoma detection rate (ADR). An endoscopy withdrawal time \>6min has been suggested to increase the ADR since it allows for thorough evaluation of the several hidden areas of the colon. The FUSE, full spectrum endoscopy system, has been demonstrated to reduce the rate of missed lesions due to its wide-angle view. In the present study the authors evaluate the impact of WT on ADR for High Definition Standard Endoscopes with just a single imager to the FUSE endoscope.

Detailed description

Introduction Colonoscopy outcome is strictly related to the adenoma detection rate. An endoscopy withdrawal time \>6min has been suggested to increase the adenoma detection rate since it allows for accurate evaluation of the several hidden areas of the colon. The FUSE endoscope has been demonstrated also to reduce the rate of missed lesions due to its wide angle view. Aim of the study to evaluate the impact on the adenoma detection rate either of the use of a FUSE endoscope or of interventions directed at optimizing withdrawal time. to assess the impact of different factors in influencing the withdrawal time Methods A prospective non-randomized observational single-center study involving consecutive outpatients, aged 18-85 yr, undergoing colonoscopy with different indications. Previous abdominal colon resection, obstruction, inadequate preparation and incomplete examination were exclusion criteria. In a 3-month period 4 expert endoscopists will performed 500 colonoscopies either with standard endoscope or with FUSE without a dedicated withdrawal time protocol. Colonoscopy withdrawal times will be measured without the endoscopists' knowledge of being monitored. During a subsequent 3-month period the same endoscopists will perform further 500 colonoscopies with standard and FUSE scopes using dedicated inspection techniques and a minimum 6-minute withdrawal time. In this second phase withdrawal times will be again measured, but endoscopists will be aware of being monitored. The following parameters will be recorded: * Demographic and general characteristics * Indications to colonoscopy * Colonoscopy findings * Quality of preparation: Boston scale * Time to reach the coecum * Withdrawal time The adenoma detection rate and the mean adenomas per patients will be calculated.

Interventions

PROCEDUREColonoscopy

Colonoscopy performed in adult consecutive patients for different indications

Sponsors

ASST Rhodense
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to 85 Years
Healthy volunteers
No

Inclusion criteria

* Indication for colonoscopy, age 18-85

Exclusion criteria

* Previous abdominal colon resection, colon obstruction, inadequate preparation and incomplete examination

Design outcomes

Primary

MeasureTime frameDescription
Adenoma detection rateUp to 10 days from the end of endoscopyThe rate of patient with at least one adenoma detected at colonoscopy

Secondary

MeasureTime frameDescription
Factors affecting the withdrawal timeUp to 10 days from the end of endoscopyAnalysis of the factors (quality of preparation, indications for colonoscopy) likely to influence the withdrawal time

Countries

Italy

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026