Carbon dioxide insufflation during withdrawal of the colonoscope improved postprocedure discomfort: A prospective, randomized, controlled trial

摘要

In colonoscopy, the question of when and how to use carbon dioxide (CO 2 ) insufflation remains uncertain. Inspection for the pathological changes during colonoscopy takes place during the withdrawal of the scope. This study aimed to determine whether CO 2 insufflation only at the withdrawal of the colonoscope has an effect comparable to that of CO 2 usage throughout the course of the procedure. Symptomatic patients were randomized in three groups: (1) patients given air insufflation (A; n ?=?33); (2) patients given CO 2 insufflation only at the time of scope withdrawal (CW; n ?=?33); and (3) patients given the CO 2 insufflation (C; n ?=?34) for the whole course of the colonoscopy. Patients were requested to answer questionnaires about their pain score during, at the end, and 1?h after the colonoscopy by using a pain numerical scale ranging from 0 to 10. The disparities of the pain score were noted at the end of the procedure and 1?h after the procedure ( p ?=?0.026 and p ?