Dynamic patient position changes during colonoscope withdrawal increase adenoma detection: a randomized, crossover...

Area of Science:

• Gastroenterology
• Endoscopy
• Colorectal Cancer Screening

Background:

• Colonoscopy has a known miss rate for adenomas, potentially due to suboptimal visualization of the colonic surface.
• Dynamic patient position changes during colonoscope withdrawal have been suggested to improve luminal distension.

Purpose of the Study:

• To evaluate if altering patient positions during colonoscopy withdrawal enhances the detection of adenomas and polyps.
• To correlate polyp and adenoma detection rates with the degree of luminal distension achieved.

Main Methods:

• A randomized crossover clinical trial was conducted involving 130 patients undergoing routine colonoscopy.
• Patients underwent examination with either consistent left lateral positioning or with dynamic position changes (left lateral, supine, right lateral) during withdrawal.
• Adenoma and polyp detection were assessed, and luminal distension was graded on a 1-5 scale.

Main Results:

• The detection of at least one adenoma was significantly higher in colon areas examined with position changes (34%) compared to those examined solely in the left lateral position (23%; P = .01).
• Overall polyp detection rates were 52% with position changes versus 34% without (P < .001).
• Improved luminal distension scores correlated positively with adenoma and polyp detection (P < .001).

Conclusions:

• Dynamic patient position changes during colonoscope withdrawal markedly improve the detection of colorectal polyps and adenomas.
• Enhanced luminal distension achieved through position changes is a key factor in improving adenoma detection rates.