Objective To compare the clinical choosing principles of sedated colonoscopy with con-ventional colonoscopy. Methods Outpatients who were willing to accept colonoscopy with or without seda-tion were prospectively recruited,which were assigned to sedated colonoscopy group(n=362)and conven-tional colonoscopy group(n=323). All patients and endoscopists were asked to answer a self-administered questionnaire. The colonoscopy completion,operation time,procedure-related discomfort,and questionnaire results of the two groups were compared and statistically analyzed. Results The completion rate was 98. 9%in the sedated colonoscopy group(358/362)and 89. 8% in the conventional colonoscopy group(290/323) ( P=0. 337 ). The operation time of sedated and conventional group were( 5. 60 ± 3. 25 ) minutes and (7. 71 ± 5. 70)minutes respectively(P<0. 001). And the average cost was CNY 886. 54 per patient in se-dated group and CNY 386. 00 per patient in the conventional group. Patient satisfaction score of conventional group and sedated group were 4(3-4)and 3(2-3)points(P<0. 001),while endoscopist satisfaction score was 4(3-4)and 4(4-4)(P<0. 001). A total of 354 patients(97. 79%)in the sedated group and 225 pa-tients(69. 66%)in the conventional group showed willingness to repeat the identical colonoscopy( P <0. 001). Patients who were male(P=0. 035),having no past abdominal operations(P<0. 001),or no ab-dominal pain during colonoscopy( P =0. 015 )in the conventional group preferred to repeat conventional colonoscopy. Conclusion Although the examination time of conventional colonoscopy is longer than sedated colonoscopy,it could reduce anesthesia risk and the cost. Conventional colonoscopy remains an irreplaceable examination of colorectal diseases in developing countries. Physicians should not only focus on patients'com-fort during endoscopy,but also help patients make a decision based on their actual situation and endoscopic indications to make the best of medical resources.

目的 对比研究多层螺旋CT门静脉血管成像(CTP)和内镜对食管、胃静脉曲张的诊断.方法 采用16排多层螺旋CT门静脉血管成像,对57例临床和实验室检查提示门静脉高压的患者进行CTP,观察门静脉及其分支走形、分布,并结合横断面图像仔细观察食管和胃有无静脉曲张,并记录其部位、曲张静脉深浅、观察曲张静脉来源、有无其他部位曲张静脉或其他病理情况.同期对这些病例行胃镜检查,观察食管、胃是否存在静脉曲张及其他病变.结果 CTP显示食管及胃静脉曲张病例51例,其中胃底静脉曲张合并食管静脉曲张39例,单纯胃底静脉曲张9例,胃底静脉曲张合并胃体静脉曲张3例.内镜发现食管及胃底静脉曲张46例,其中胃静脉曲张合并食管静脉曲张24例,单纯胃静脉曲张5例,单纯食管静脉曲张17例.CTP可发现内镜无法诊断的肌层或管腔外静脉曲张.结论 CTP可清晰显示门静脉高压患者食管、胃底静脉曲张及主要侧支血管的走行、分布.在食管静脉曲张检查方面,CTP与内镜效果相当,CTP有几例假阳性,可作为普通内镜检查的良好补充;对于胃静脉曲张的检查,CTP效果较胃镜敏感,且CTP可清晰显示内镜无法观察的胃腔周围和食管周围静脉曲张.