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Efficacy of Transparent Cap-attached Colonoscopy: Does It Improve the Quality of Colonoscopy?

대한대장항문학회지 2010년 26권 2호 p.116 ~ 122
최동현 ( Choi Dong-Hyun ) - 양병원 대장항문외과

이석환 ( Lee Suk-Hwan ) - 경희대학교 의과대학 외과학교실
임청호 ( Lim Cheong-Ho ) - 양병원 대장항문외과
이영찬 ( Lee Young-Chan ) - 양병원 대장항문외과
신현근 ( Shin Hyeon-Keun ) - 양병원 대장항문외과
정승규 ( Jeong Seung-Kyu ) - 양병원 대장항문외과
양형규 ( Yang Hyung-Kyu ) - 양병원 대장항문외과


Purpose: Recently, the use of a transparent cap attached to the tip of the colonoscope has been revealed to be helpful in both detecting colorectal polyps and shortening the intubation time to the cecum. The aim of this study was to examine the usefulness of transparent cap-attached colonoscopy (CAC) as compared with conventional colonoscopy (CC) in terms of the technical ease and efficiency.

Methods: Colonoscopies from a total of 228 patients between May and October 2008 were prospectively collected. All colonoscopies were performed by single colorectal surgeon whose experience exceeded 3,000 colonoscopies. Patients were assigned to the CAC group (n=114) or to the CC group (n=114). The cecal intubation rate and time, the polyp detection rate, the adenoma detection rate, the withdrawal time, and the visual analogue scale (VAS) of the patient’s pain were compared.

Results: There were no significant differences in the age, sex, body mass index, previous history of abdominal operation, diverticulosis, and the degree of bowel preparation between the two groups. The cecal intubation rate was 100% in both groups. The cecal intubation time was significantly shorter in the CAC group than in the CC group overall (5.3±4.0 min vs. 7.6±4.3 min, P<0.001), as well as for female (6.1±2.8 min vs. 9.1±4.7 min, P<0.001) patients. There were no statistically significant differences in the total colonoscopy time (13.1±6.3 min vs. 14.5±5.2 min, P=0.066), the polyp detection rate (38.6% vs. 33.3%, P=0.408), the adenoma detection rate (28.1% vs. 25.4%, P=0.654), and the VAS scale of pain (2.48 vs. 2.74, P=0.353) between the CAC and the CC groups.

Conclusion: The transparent cap is effective in shortening the cecal intubation time, especially in female patients.


Transparent cap;Colonoscopy;Efficiency;Cecal intubation time;Adenoma detection rate
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