A 3D-printed cap with sideoptics for colonoscopy: a randomized ex vivo study

Abstract

<b>Background</b> Adequate polyp detection is crucial to colonoscopy; however, detection can be impaired. In particular, flat polyps located behind folds or near the colonic flexures appear to be a problem. We present a cheap and easily adjustable 3D-printed tool to enhance the view of a standard colonoscope using additional commercially available sideoptics. <b>Materials and methods</b> A cap adjustable to a standard endoscope was printed by a 3 D printer and had two microcameras fixed to offer two additional views. Fourteen endoscopists performed one standard and one sideoptic-enhanced colonoscopy in a randomized order. Flat lesions were simulated in an endoscopy training model. Time for withdrawal was measured, along with the number of flat lesions detected. <b>Results</b> Withdrawal time did not differ significantly between standard and sideoptic-enhanced colonoscopy (329 vs. 389 seconds). The median number of detected flat lesions per endoscopic examination was significantly higher using the sideoptic tool (8 vs. 6.5; <i>P</i> = 0.001). <b>Conclusions</b> A 3D-printed sideoptic-enhanced cap including two microcameras may be a cheap, easy, and feasible add-on to improve adenoma detection rates in routine colonoscopy.