Dr Hala Fatima and colleagues assessed whether a 170° angle of view (wide angle) colonoscope allowed faster withdrawal without decreasing adenoma detection.
The team reported that 8 colonoscopists at 2 institutions participated in the study.
Patients were randomized so that each colonoscopist performed 50% of the exams with a 160 series, which had a standard 140° angle of view colonoscope.
The remaining 50% of the exams were performed with a prototype 160 series colonoscope with a wide colonoscope of a 170° angle of view.
|Clinical Gastroenterology & Hepatology|
The team recorded insertion and withdrawal times, and number of polyps detected.
Endoscopists were asked to withdraw as quickly as they could carefully complete the exams.
Analysis of variance was done to compare insertion, and withdrawal times, and number of polyps detected.
Time to perform biopsy, polypectomy, and cleaning was subtracted using a stopwatch.
The researchers performed a total of 710 procedures, 355 with standard, and 355 with wide angle colonoscope.
The mean insertion time was similar between the colonoscopes.
The team found that the mean withdrawal time with the wide angle colonoscope was 5 minutes, which was shorter overall.
The researchers found no difference in the mean number of adenomas detected per colonoscopy with standard compared to wide angle.
The research team noted that 2 of the 3 endoscopists with shorter withdrawal times with wide angle had numerically higher detection rates with wide angle.
Dr Halas' team concluded, "The wide angle colonoscope is associated with a reduction in withdrawal time without compromising adenoma detection."
"However, this effect is operator dependent, and the overall impact of wide-angle optics in this study was minor."