Changes in Adenoma Detection Rate With Implementation of Full-spectrum Endoscopy: A Report of 3998 Screening Colonoscopies

GOALS: To investigate the effect of implementing full-spectrum endoscopy (Fuse) on adenoma detection rate (ADR) at an ambulatory surgical center (ASC). BACKGROUND: Traditional forward viewing (TFV) endoscopes have 1 camera and provide an angle of view of 140 to 170 degrees, whereas Fuse provides a 330 degrees view through the addition of 2 side cameras. Although randomized studies have shown that Fuse decreases adenoma miss rates, its impact on ADR in a screening population is currently unknown. STUDY: We conducted a retrospective analysis of data from average risk screening colonoscopies at a 5-room ASC. This ASC transitioned from TFV to Fuse in April 2014. The primary outcome was ADR defined as the percentage of patients who underwent screening colonoscopy and were found to have at least 1 adenomatous polyp. RESULTS: A total of 1696 screening colonoscopies were performed with TFV and 2302 with Fuse. Overall ADR was 23.7% with TFV and 29.0% with Fuse (P<0.01), an absolute increase of 5.3%. ADR for the proximal colon increased from 13.0% with TFV to 16.7% with Fuse (3.8% increase, P<0.01). ADR for advanced adenomas improved from 3.8% with TFV to 6.0% with Fuse (2.2% increase; P<0.01). The mean number of adenomas detected per colonoscopy increased from 0.32 to 0.41 (P<0.01). In multivariate analysis, the adjusted odds ratio for detecting an adenoma with Fuse versus TFV was 1.30 (P<0.01; 95% confidence interval, 1.11-1.51). CONCLUSIONS: ADR significantly increased after adopting Fuse endoscopes at an ASC. Further studies are warranted to further understand the effects of Fuse on ADR in real-world settings.