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Does flexible small-diameter colonoscope reduce insertion pain during colonoscopy?

World Journal of Gastroenterology 2000年第5期6卷 659-663页

作者： Yoshiharu Uno Akihiro Munakata First Department of Medicine School of MedicineHirosaki University036- 8216Japan

AIM It is well known that colonoscopy can bedifficult due to abdominal pain induced duringcolonoscope insertion,if sedative agents are ***,an extra-flexible,small-diameter colonoscope(CF-SV,Olympus Inc.,Japan)was developed in order to improve safetyand *** aim of this study was toaccess the usefulness of the *** One hundred patients undergoingsigmoidoscopy were recruited and colonoscopywas performed by one ***,a routine-type colonoscope(CF-2301)was inserted into the colon *** the patient complained ofabdominal pain(even if mild),the scope wasnot advanced further and was withdrawn afterthe anatomic location of its tip was ***,the CF-SV was inserteduntil it reached the cecun or the site whereabdominal pain *** abdominalsurgery and abdominal disease were consideredas unfavorable factors(UF)and the relationshipbetween abdominal pain and UF,age and genderwere ***,the colonicinsertion pressures in 36 patients with abdominalpain were measured with a force *** Thirty-four cases(34%)felt no painwith the CF-2301 and successful pancolon-0scopies to the cecum were ***-six cases(66%)complained of abdominal *** procedure was painless for 47% of men and24% of women,*** CF-2301 scopefailed to reach the sigmoid-descending colon junctions in 59(89.4%)of the 66 patientscomplaining of abdominal ***,CF-SVreached proximal area in 94.9% of those whofailed with *** median pressure forpain-inducing was 700 g/cm^*** Unsedated patients with UFwere prone to complain of pain when thestandard-type CF-2301 scope was *** developed extra-flexible CF-SV is usefulfor the aged and for those with UF or being proneto suffer from abdominal *** agentsmay be unnecessary if this new type ofcolonoscope is used.

关键词： colonoscopy abdominal pain flexible colonoscope insertion pressure unfavorable factors sigmoidoscopy

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Combined Use of Single-balloon Enteroscope and colonoscope for Self-expandable Metal Stent Placement in Patients with Malignant Small Intestinal Obstruction: a Single-center Comparative Clinical Observation

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Journal of Huazhong University of Science and Technology(Medical Sciences) 2017年第3期37卷 357-361页

作者：张亚飞宁守斌李白容张静李静唐杰朱鸣金晓维赵秋毛高平 Department of Gastroenterology General Hospital of Air Force PLA Department of Gastroenterology Zhongnan Hospital of Wuhan University

Small intestinal obstruction is a common complication of primary gastrointestinal cancer or metastatic cancers. Patients with this condition are often poor candidates for surgical bypasses, and placement of self-expanding metal stent(SEMS) can be technically challenging. In this study, we examined the feasibility of combined application of single-balloon enteroscope(SBE) and colonoscope for SEMS placement in patients with malignant small intestinal obstruction. Thirty-four patients were enrolled in this study, among which 22 patients received SEMS placement by using SBE and colonoscope, while the other 12 patients received conservative medical treatment. The patients were followed up for one year. Stent placement was technically feasible in 95.5%(21/22). Clinical improvement was achieved in 86.4%(19/22). For the 19 clinical success cases, the average time of benefits from a gastric outlet obstruction scoring system(GOOSS) increase ≥1 was 111.9±89.5 days. For the 12 patients receiving conservative medical treatment, no significant improvement in GOOSS score was observed. Moreover, a significant increase of Short-Form-36 health survey score was observed in the 19 patients at time of 30 days after stent placement. By Kaplan-Meier analysis, a significant survival improvement was observed in patients with successful SEMS placement, compared with patients receiving conservative medical treatment. Taken together, combined use of SBE and colonoscope makes endoscopic stent placement feasible in patients with malignant small intestinal obstruction, and patients can benefit from it in terms of prolonged survival and improved quality of life.

关键词： small intestinal obstruction single-balloon enteroscope colonoscope stent placement

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Study on Active Drive System for colonoscope

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High Technology Letters 2001年第4期7卷 77-80页

作者：米智楠 Gong Zhenbang Mi Zhiwei Qian Jinwu Shen Linyong School of Mechatronics and Automation Shanghai University

The paper deals with active drive system for colonoscope. The system is mainly composed of soft mobile mechanism for earthworm locomotion and turning mechanism based on shape memory effect. The soft mobile mechanism contacts colon wall with air in inflatable balloons, so the robot has better soft and non invasive properties. The turning mechanism can be actively bent by shape memory alloy components. It ensures the colonoscope to adapt to the tortuous shape of colon. Some experiment results are given in the paper.

关键词： Active drive system colonoscope Earthworm locomotion Shape memory alloy

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Which scope is appropriate for endoscopic retrograde cholangiopancreatography after Billroth II reconstruction:An esophagogastroduodenoscope or a colonoscope?

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World Journal of Gastrointestinal Endoscopy 2020年第8期12卷 220-230页

作者： Mitsuru Sugimoto Tadayuki Takagi Rei Suzuki Naoki Konno Hiroyuki Asama Yuki Sato Hiroki Irie Ko Watanabe Jun Nakamura Hitomi Kikuchi Mika Takasumi Minami Hashimoto Tsunetaka Kato TakutoHikichi Hiromasa Ohira Department of Gastroenterology School of MedicineFukushima Medical UniversityFukushima 9601247Japan Department of Endoscopy Fukushima Medical University HospitalFukushima 9601247Japan

BACKGROUND Recently,with the advent of more advanced devices and endoscopic techniques,endoscopic retrograde cholangiopancreatography(ERCP)in Billroth II(B-II)patients has been increasingly ***,the procedures are difficult,and the techniques and strategies have not been *** To reveal the appropriate scope for ERCP in B-II *** Sixty ERCP procedures were performed on B-II patients between June 2005 and May 2018 at Fukushima Medical University Hospital,and in 44 cases,this was the first ERCP procedure performed by esophagogastroduodenoscopy(EGDS)or colonoscopy(CS)after B-II *** cases were divided into two groups:17 cases of ERCP performed by EGDS(EGDS group)and 27 cases of ERCP performed by CS(CS group).The patient characteristics and ERCP procedures were compared between the EGDS and CS *** The procedural time was significantly shorter in the EGDS group than in the CS group[median(range):60(20-100)vs 90(40-128)min,P value<0.01].CS was an independent factor of a longer ERCP procedural time according to the univariate and multivariate analyses(odds ratio:3.97,95%CI:1.05-15.0,P value=0.04).CONCLUSION Compared to CS,EGDS shortened the procedural time of ERCP in B-II patients.

关键词： Endoscopic retrograde cholangiopancreatography Billroth II reconstruction Esophagogastroduodenoscope colonoscope

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Study on Moving Principle of Colonoscopic Robot

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Journal of Shanghai University(English Edition) 2001年第2期5卷 143-146页

作者： MIZhi－nan GONGZhen－bang 等 SchoolofElectromechanicalengineeringandAutomation ShanglhaiUniversityShanghai200072China

The moving principle of a colonoscopic robot is presented in this paper. The robot mainly consists of soft mobile mechanism for earthworm locomotion and turning mechanism based on shape memory effect. The soft mobile mechanism contacts colon wall with air in inflatable balloons, so the robot has better soft and non invasive properties. The turning mechanism can be actively bent by shape memory alloy components. It ensures the robot to adapt to the tortuous shape of colon. Therefore, the colonoscopic robot has good safety, lower working strength of surgeon and higher efficiency of colonooscopy.

关键词： robot colonoscope earthworm locomotion shape memory alloy

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Magnetic endoscopic imaging vs standard colonoscopy:Meta-analysis of randomized controlled trials

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World Journal of Gastroenterology 2013年第41期19卷 7197-7204页

作者： Yi Chen Yu-Ting Duan Qin Xie Xian-Peng Qin Bo Chen Lin Xia Yong Zhou Ning-Ning Li Xiao-Ting Wu Department of Gastrointestinal Surgery West China HospitalSichuan University Department of Radiology People’s Hospital Department of Gastroenterology West China HospitalSichuan University

AIM:To assess the theoretical advantages of magnetic endoscope imaging(MEI)over standard colonoscopies(SCs)and to compare their ***:Electronic databases,including PubMed,EMBASE,the Cochrane library and the Science Citation Index,were searched to retrieve relevant *** addition,abstracts from papers presented at professional meetings and the reference lists of retrieved articles were reviewed to identify additional *** metaanalyses were performed using RevMan 5.1.A random effect model with the Mantel-Haenszel method was used for pooling dichotomous and continuous data.A sensitivity analysis was performed by excluding the trials with a small number of patients and by excluding the trials performed by inexperienced ***:Eight randomized controlled trials(RCTs),including 2967 patients,were included in the metaanalysis to compare cecal intubation rates and times,sedation dose,abdominal pain scores and the use of ancillary maneuvers between MEI and *** overall OR was 1.92(95%CI:1.13-3.27,eight RCTs),as indicated by the cecal intubation rate of MEI compared with SC,but MEI did not have any distinct advantage over SC for cecal intubation time(MD=-0.07,95%CI:-0.16-0.02;three RCTs).MEI did not generally result in lower pain *** were also analyzed for the two subgroups based on the endoscopists’experience level to evaluate cecal intubation *** presented better outcomes for non-experienced colonoscopists than experienced ***:The real-time magnetic imaging system is of benefit in training and educating inexperienced endoscopists and improves the cecal intubation rate for experienced and inexperienced endoscopists.

关键词： colonoscope Magnetic endoscope imaging Magnetic Standard colonoscope Meta-analysis

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When and why a colonoscopist should discontinue colonoscopy by himself?

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World Journal of Gastroenterology 2015年第25期21卷 7834-7841页

作者： Tao Gan Jin-Lin Yang Jun-Chao Wu Yi-Ping Wang Li Yang Division of Gastroenterology and Hepatology West China Hospital Sichuan University

AIM: To investigate when and why a colonoscopist should discontinue incomplete colonoscopy by ***: In this cross-sectional study, 517 difficult colonoscope insertions(Grade C, Kudo's difficulty classification) screened from 37800 colonoscopy insertions were collected from April 2004 to June 2014 by three 4th-level(Kudo's classification) colonoscopists. The following common factors for the incomplete insertion were excluded: structural obstruction of the colon or rectum, insufficient colon cleansing, discontinuation due to patient's discomfort or pain, severe colon disease with a perforation risk(e.g., severe ischemic colonopathy). All the excluded patients were re-scheduled if permission was obtained from the patients whose intubation had failed. If the repeat intubations were still a failure because of the difficult operative techniques, those patients were also included in this study. The patient's age, sex, anesthesia and colonoscope type were recorded before colonoscopy. During the colonoscopic examination, the influencing factors of fixation, tortuosity, laxity and redundancy of the colon were assessed, and the insertion time(> 10 min or ≤ 10 min) were registered. The insertion time was analyzed by t-test, and other factors were analyzed by univariate and multivariate logistic ***: Three hundred and twenty-two(62.3%) of the 517 insertions were complete in the colonoscope insertion into the ileocecum, but 195(37.7%) failed in the insertion. Fixation, tortuosity, laxity or redundancy occurred during the colonoscopic examination. Multivariate logistic regression analysis revealed that fixation(OR = 0.06, 95%CI: 0.03-0.16, P < 0.001) and tortuosity(OR = 0.04, 95%CI: 0.02-0.08, P < 0.001) were significantly related to the insertion into the ileocecum in the left hemicolon; multivariate logistic regression analysis also revealed that fixation(OR = 0.16, 95%CI: 0.06-0.39, P < 0.001), tortuosity(OR0.23, 95%CI: 0.13-0.43, P < 0.001), redundanc

关键词： Colonoscopy colonoscope insertion Insertiontechnique

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Clinical application of ultrasonic probing for preoperative staging of colorectal carcinoma

Clinical application of ultrasonic probing for preoperative ...

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中国医师协会内镜医师分会成立大会、中国第十四届内镜医学学术大会、《中国内镜杂志》创刊十周年学术讨论会、恩德思奖（Endoscopics Award）颁奖大会

作者： ZHOU Ping -hong, YAO Li -qing, HE Guo -jie, GAO Wei -dong.QIN Xin -yu (Department of General Surgery, Zhongshan Hospital, Fudan University,Shanghai 200032,P. R. China)

Abstract:[Objective] The aim of this study was to assess the value of ultrasonic probe (USP) under colonoscope in the preoperative staging of colorectal carcinoma. [Methods] 75 patients with colorectal carcinomas proven pathologically were given USP (Olympus UM-2R, 12MHz;UM -3R, 20 MHz) under colonoscope before operation. The results were compared with histopathologic findings of resected specimens. [Results] Colorectal carcinoma appeared as a hypoechoic mass under USP. USP had an overall accuracy rate of 82.7% in the diagnosis of T staging of colorectal carcinoma. In determining lymph node metastasis , the sensitivity and specificity were 53.2% and 61. 5%, the positive predictive value and the negative predictive value were 0. 87 and 0. 22, respectively. [Conclusions] USP is valuable for the staging of colorectal carcinoma and has a high accuracy rate in determining the depth of tumor invasion. The preoperative information obtained by this tool may influence the choice of therapy.

关键词： USP colonoscope carcinoma

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End-ileum inflammatory polypbridge: A case report

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空军军医大学学报 2001年第18期 1628-1628页

作者： LIU Li1, LI Wei-Xin2, ZHANG Shao-Ling1, HUANG Yu-Xin1, PAN Bo- Rong3 ( 1Department of Gastroenterology, 2Department of Neurosurgery, Tangdu Hospital, Xi'an 710038, China 3Oncology Center, Xi jing Hospital, Fourth Military Medical University, Edpartmetn of gastroenterology Xijing Hospital Fourth Military Medical University Department of Neurosurgery Tangdu Hospital Oncology Center Xijing Hospital Fourth Military Medical University

INTRODUCTION From 1986-07 to 1999-09,colonoscopy was parformed in 3800 patients.

关键词： colonoscope polyp-bridge diagnosis

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