A grading scale to evaluate colon cleansing for the PillCam COLON capsule: a reliability study

Area of Science:

• Gastroenterology
• Medical Devices
• Clinical Trials

Background:

• PillCam COLON capsule is an emerging technology for colon visualization.
• Assessing colon cleansing quality is crucial for capsule endoscopy effectiveness.

Purpose of the Study:

• To evaluate the interobserver agreement of a novel grading scale for colon cleansing.
• To compare a 2-point and a 4-point cleanliness grading scale for capsule colonoscopy preparation.

Main Methods:

• Prospective study involving healthy volunteers undergoing colon preparation and ingesting a PillCam COLON capsule.
• Two experienced gastroenterologists independently rated colon cleansing using a 2-point and a 4-point scale.
• Interobserver agreement was assessed using kappa (κ) values for individual segments and overall video assessment.

Main Results:

• A total of 196 colon video segments from 40 participants were evaluated.
• The 2-point scale demonstrated good interobserver agreement (κ=0.754 per segment, κ=0.647 overall).
• The 4-point scale also showed good agreement (κ=0.619 per segment, κ=0.44 overall), though slightly lower than the 2-point scale.

Conclusions:

• The new cleanliness grading scale exhibits good interobserver agreement.
• This scale is suitable for use with the PillCam COLON capsule to evaluate preparation quality.
• Standardized assessment of colon cleansing can improve capsule endoscopy outcomes.