Inspection on instrument insertion during colonoscopy: a randomized controlled trial

Hewett, David G. and Rex, Douglas K. (2012) Inspection on instrument insertion during colonoscopy: a randomized controlled trial. Gastrointestinal Endoscopy, 76 2: 381-387. doi:10.1016/j.gie.2012.04.454

Author Hewett, David G.
Rex, Douglas K.
Title Inspection on instrument insertion during colonoscopy: a randomized controlled trial
Journal name Gastrointestinal Endoscopy   Check publisher's open access policy
ISSN 0016-5107
Publication date 2012-08
Sub-type Article (original research)
DOI 10.1016/j.gie.2012.04.454
Volume 76
Issue 2
Start page 381
End page 387
Total pages 7
Place of publication Philadelphia, PA, United States
Publisher Mosby
Collection year 2013
Language eng
Formatted abstract
Background: Polyps seen and not removed during colonoscope insertion are sometimes unable to be found during withdrawal.

Objective: To investigate the impact of additional inspection during instrument insertion on adenoma detection in sedated patients undergoing routine screening or surveillance colonoscopy.

Design: Randomized, controlled trial.

Setting: University hospital and associated ambulatory surgery center.

Patients: Patients undergoing elective screening or surveillance colonoscopy.

Intervention: Patients were randomized to undergo colonoscopy with 3 minutes of dedicated inspection time during insertion plus 6 minutes during withdrawal versus 9 minutes of inspection on instrument withdrawal.

Main Outcome Measurements: The primary outcome measure was the adenoma detection rate (proportion of patients with adenomas) between patients in whom inspection for adenomas was performed partly on instrument insertion compared with patients for whom inspection was performed entirely on withdrawal.

Results: There was no difference in the proportion of patients with 1 or more adenomas between the inspection on insertion group (52%) and the inspection on withdrawal group (58%). There were no significant differences in total procedure time, time taken to remove polyps, sedation doses, or after-procedure pain between groups.

Limitations: Single-center study with two endoscopists.

Conclusion: Inspection during colonoscope insertion offered no additional benefit compared with an equivalent period of inspection performed entirely during withdrawal. These results do not support an additional role for routine inspection during colonoscope insertion.
Keyword Polyps
Adenoma detection
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2013 Collection
School of Medicine Publications
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