Combined Forward and Retroflexion Withdrawal During Colonoscopy Using A Second-Generation Short-Turn Radius Colonoscope

Aims We aimed to evaluate the impact of combined forward and retroflexion withdrawal using a second-generation short-turn radius colonoscope during colonoscopy.

Methods A non-randomized, single-center prospective trial. Patients were submitted first to a standard high-definition screening colonoscopy. Then, a second procedure on the same patient combining forward and retroflexion was performed by a different operator. Lesions detected on the second procedure were considered as originally missed during standard colonoscopy. We calculated the polyp detection rate and the adenoma detection rate of both standard and combined colonoscopy techniques. Statistical analysis was performed on R.4.0.3.

Results A total of 203 patients were included for analysis. The median age was 57 years, 66 % were female. The reason for colonoscopy was diagnostic on 81.3 %, screening on 15.8 %, and 3.0 % for surveillance. Regarding size of the lesions, 74.5 % of lesions detected on forward-viewing were < 5 mm. Whereas, on retroflexion 65.3 % sized < 5mm and 34.7 % between 5-10 mm. The polyp detection rate for forward-viewing colonoscopy was 39.90. The polyp detection rate for combined forward and retroflexion colonoscopy was 54.18. The adenoma detection rate for forward-viewing colonoscopy was 21.18. The adenoma detection rate for combined forward and retroflexion colonoscopy was 32.01.

Conclusions We found that combined forward and retroflexion withdrawal technique during colonoscopy increases the polyp and adenoma detection rates in comparison to standard colonoscopy. Larger, multi-center trials are necessary to validate these data.

Citation: Robles-Medranda C, Oleas R, Alcivar-Vasquez J et al. OP131 COMBINED FORWARD AND RETROFLEXION WITHDRAWAL DURING COLONOSCOPY USING A SECOND-GENERATION SHORT-TURN RADIUS COLONOSCOPE. Endoscopy 2021; 53: S54.

Publication History

Article published online:
19 March 2021