Multicenter study of colon capsule endoscopy in post-polypectomy surveillance

Area of Science:

• Gastroenterology
• Medical Devices
• Public Health

Background:

• The National Health Service implemented colon capsule endoscopy (CCE) during the COVID-19 pandemic as an alternative to colonoscopy for patients needing 3-year post-polypectomy surveillance.
• This aimed to address capacity issues and provide patient choice in colorectal cancer screening.

Purpose of the Study:

• To evaluate the safety, diagnostic accuracy, and clinical utility of CCE in patients undergoing surveillance after polypectomy.
• To determine the effectiveness of CCE in managing patient pathways and sparing colonoscopy capacity.

Main Methods:

• A comparative study involving patients undergoing either CCE or colonoscopy for 3-year post-polypectomy surveillance.
• Development of a risk-based guidance system for CCE patients to direct subsequent endoscopic intervention, deferral, or discharge.
• Assessment of safety, diagnostic accuracy (sensitivity for polyp detection), and colonoscopy capacity utilization.

Main Results:

• 99% of patients tolerated CCE safely. Higher detection rates for larger polyps (≥ 10 mm and 6-9 mm) were observed in the CCE cohort compared to the colonoscopy cohort.
• Per-patient sensitivities for detecting ≥ 10 mm and 6-9 mm polyps were 92% and 90%, respectively.
• Two-thirds of CCE patients followed a modified management pathway, with 25% discharged and 27% having procedures deferred; completion and preparation rates were 78% and 73%.

Conclusions:

• Colon capsule endoscopy is a safe diagnostic method for identifying colorectal polyps in a surveillance setting.
• CCE acts as a "filter function," augmenting existing colorectal diagnostic services by increasing capacity and providing patient choice.