Colonoscopic withdrawal technique is associated with adenoma miss rates

Background: Clinical studies have documented differences in detection rates of colorectal cancers and adenomas between experienced colonoscopists, the basis of which is unknown. The aim of this study was to determine whether colonoscopic withdrawal technique varies between 2 colonoscopists with know n differences in adenoma detection rates. Methods: Ten consecutive colonoscopic withdrawals by each of the 2 colonosc opists were videotaped and then assessed according to specific criteria by 4 experts blinded to who had performed the colonoscopies. Results: Each of the 4 experts scored the colonoscopist with the lower miss rate significantly higher (p < 0.001) for each of 4 quality criteria: (1) examining the proximal sides of flexures, folds and valves, (2) cleaning an d suctioning, (3) adequacy of distention, and (4) adequacy of time spent vi ewing. Conclusion: Higher quality colonoscopic withdrawal technique as determined by expert observers was associated with a colonoscopist with a previously d ocumented lower miss rate for adenomas. Colonoscopic withdrawal technique s hould be subjected to further study and standards for withdrawal technique should be developed.