RESUMO
Objective To find the related factors of the unsuccessful unsedated colonoscopy. Methods Clinical data of 1 726 consecutive subjects who underwent colonoscopy without sedation from April 2014 to January 2015 at the second affiliated hospital of Soochow university were analyzed. Data included characteristics of the patients (age, gender, body mass index, degree of education, the bowel-cleaning drugs, previous colonoscopy experience, bowel habits, history of chronic disease, history of sport, history of abdominal or pelvic surgery, the indication of colonoscopy, mood, quality of bowel preparation, and presence/absence of colonic diverticulum), the characteristics of the physicians (procedure experience, the instrument handling method). These factors were analyzed to evaluate their impact on result of unsedated colonoscopy. Results This study included 1 726 patients (male/female: 927/799). These patients' average age was 50.04 years old, the cecal intubation rate was 91.6%, and the average intubation time was 10.27 minutes. The multiple regression analysis showed the elderly patient, lower BMI, irritability, consti﹣pation, poor bowel preparation were associated with the lower cecal intubation rate. Conclusions The elderly patient, lower BMI, irritability, constipation and poor bowel preparation were associated with the failure of unsedated colonoscopy. In clinical practice, quality improvement programs are needed to improve the rate of total colonoscopy.