Effect of Water Exchange Method on Adenoma Miss Rates in Patients Undergoing Selective Polypectomy
Effect of Water Exchange Method on Adenoma Miss Rates in Patients Undergoing Selective Polypectomy: a Single-centered, Randomized Controlled Study
調査の概要
詳細な説明
For WE method, the air pump was turned off for the full duration of insertion to avoid inadvertent air insufflations and colon elongation. Residual air in the lumen was suctioned to minimize angulations at flexures. Water at 37°C was infused with a pump (Olympus) through the biopsy channel to confirm correct tip orientation for scope advancement. The infused water was removed predominantly by suction when the colonoscope was smoothly advanced during the insertion phase, and turbid luminal water due to residual feces was exchanged by clean water until the lumen was clearly visualized. Occasionally, if it was difficult to determine whether the colonoscope tip was in the cecum, air was allowed to be insufflated for observation. If the position of the scope tip was confirmed to be not in the cecum, insufflated air would be removed by suction and the WE method would be continuously used until successful intubation.
For the AI method, water was not used, and air was insufflated during insertion.
Air was insufflated to distend the lumen for inspection and biopsy or polypectomy during withdrawal for both methods. Polyps will be removed by forceps biopsy (polyps size <3mm), cold snare technique (3-6mm) or endoscopic mucosal resection (size≥6mm).
研究の種類
入学 (予想される)
段階
- 適用できない
連絡先と場所
研究場所
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Shaanxi
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Xi'an、Shaanxi、中国、710032
- 募集
- Endoscopic center, Xijing Hospital of Digestive Diseases
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コンタクト:
- Gui Ren, MD
- 電話番号:+862984771536
- メール:renguigz@hotmail.com
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主任研究者:
- Gui Ren, MD
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参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
Inclusion Criteria:
- Age 18-80 patients undergoing selective polypectomy
Exclusion Criteria:
- Polyps found more than 6 months
- Patients with polyposis syndrome or hereditary nonpolyposis colorectal cancer
- Patients with history of inflammatory bowel disease
- Patients with planning to undergo Endoscopic Submucosal Dissection(ESD)
- Patients not undergoing standard bowel preparation
- Patients with solid feces in the last stool after bowel preparation
- Patients considered to be high risk for bleeding during Endoscopic mucosal resection (EMR), e.g. using antiplatelet drugs (clopidogrel) within 5 days before the current colonoscopy
- Hemodynamically unstable
- Pregnant women
- Unable to provide informed consent
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:処理
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:独身
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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実験的:Water exchange (WE) method
Water exchange (WE) method was used for insertion to the cecum.
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Water exchange (WE) method was used for insertion to the cecum.
And air was insufflated to distend the lumen for inspection and biopsy or polypectomy during withdrawal procedure.
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アクティブコンパレータ:Air insufflation (AI) method
Air insufflation (AI) method was used for insertion to the cecum.
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Air insufflation (AI) method was used for insertion to the cecum.
And air was insufflated to distend the lumen for inspection and biopsy or polypectomy during withdrawal procedure.
|
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Adenoma miss rate
時間枠:12 months
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Adenoma miss rate was calculated as the number of patients with one and more additional adenomas during polypectomy procedure divided by the total number of patients in each group.
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12 months
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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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adenoma-level miss rate
時間枠:12 months
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Adenoma-level miss rate was calculated as the number of additional adenomas detected in polypectomy procedure divided by the total number of adenomas in each group.
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12 months
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Advanced adenoma miss rate/Miss advanced adenoma per colonoscopy
時間枠:12 months
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Advanced adenoma: any with 3 or more adenomas of any size, 1 or more large adenomas 1 cm, or 1 or more adenomas with villous architecture or highgrade dysplasia.
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12 months
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Adenoma per positive patient (APP)
時間枠:12 months
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The mean number of adenoma per positive patient
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12 months
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Quality of Bowel Preparation
時間枠:12 months
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The Boston Bowel Preparation Scale (BBPS): cleanliness of each part of the colon: 0=unprepared colon segment with mucosa not seen because of solid stool that cannot be cleared; 1=portion of mucosa of the colon segment seen, but other areas of the colon segment not well seen because of staining, residual stool, and/or opaque liquid; 2=minor amount of residual staining, small fragments of stool and/or opaque liquid, but mucosa of colon segment seen well; 3=entire mucosa of colon segment seen well with no residual staining, small fragments of stool, or opaque liquid.
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12 months
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Complication rate
時間枠:12 months
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Bleeding, perforation and others
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12 months
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Pain Scores on the Visual Analog Scale compared with previous colonoscopy
時間枠:12 months
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0 = no pain, to 10 = most severe pain
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12 months
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協力者と研究者
出版物と役立つリンク
一般刊行物
- Hewett DG, Rex DK. Cap-fitted colonoscopy: a randomized, tandem colonoscopy study of adenoma miss rates. Gastrointest Endosc. 2010 Oct;72(4):775-81. doi: 10.1016/j.gie.2010.04.030. Epub 2010 Jun 25.
- Veitch AM, Vanbiervliet G, Gershlick AH, Boustiere C, Baglin TP, Smith LA, Radaelli F, Knight E, Gralnek IM, Hassan C, Dumonceau JM. Endoscopy in patients on antiplatelet or anticoagulant therapy, including direct oral anticoagulants: British Society of Gastroenterology (BSG) and European Society of Gastrointestinal Endoscopy (ESGE) guidelines. Gut. 2016 Mar;65(3):374-89. doi: 10.1136/gutjnl-2015-311110.
- Ren G, Wang X, Luo H, Yao S, Liang S, Zhang L, Dong T, Chen L, Tao Q, Guo X, Han Y, Pan Y. Effect of water exchange method on adenoma miss rate of patients undergoing selective polypectomy: A randomized controlled trial. Dig Liver Dis. 2021 May;53(5):625-630. doi: 10.1016/j.dld.2020.11.012. Epub 2020 Dec 31.
研究記録日
主要日程の研究
研究開始
一次修了 (予想される)
研究の完了 (予想される)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (見積もり)
学習記録の更新
投稿された最後の更新 (見積もり)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
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