A live animal model of major haemorrhage using an implanted short gastric artery was devised to test the efficacy and safety of these endo-suture devices in vivo. Pulsatile arterial bleeding was successfully reproduced in eight pigs' stomachs through incision of the pre-buried vessels. Endoscopic suturing controlled the bleeding in all animals without obvious complications. The mean operating time with the Eagle Claw V was statistically shorter than that with the Eagle Claw II machine (3.6 verse 13.8 minutes, p<0.001). / A vessel-perfusion-manometry system was first established incorporating porcine stomach and splenic artery with the Erlangen model. / From these investigations, it is concluded that (1) Both the vessel-perfusion-manometry system and the animal arterial haemorrhage model are reliable, reproducible and realistic methods suitable for endoscopic experiment in the laboratory settings. (2) Either three-throw knot tied endoscopically or intracorporeal endo-loop ligation can secure vessels as large as 2mm in diameter enduring flow pressure greater than 200 mmHg. (3) It is possible to control massive arterial bleeding in stomach with endoscopic suturing using the novel apparatus with a curved needle. (4) The Eagle Claw V represents significant improvement over previous version, and is associated with ease of operation and higher security, which brings the technique closer to clinical applications. (Abstract shortened by UMI.) / Peptic ulcer remains the most common cause of upper gastrointestinal haemorrhage. Existing endoscopic haemostatic modalities cannot securely control massive ulcer bleeding from large eroded vessels. A well-designed endoscopic suturing device has the possibility to plicate large artery. In addition, it may provide enormous potential in other forms of endo-surgery. A novel suturing device using a curved needle, the Eagle Claw, was developed. The aims of this thesis were to evaluate the efficacy and safety of the Eagle Claw II and V in arresting artificial gastric bleeding from large vessel in a laboratory setting. These devices were tested both in vitro on the bench and in vivo in live animal models. / Hu Bing. / "August 2005." / Adviser: Ng Ekw. / Source: Dissertation Abstracts International, Volume: 67-07, Section: B, page: 3694. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (p. 136-160). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. [Ann Arbor, MI] : ProQuest Information and Learning, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract in English and Chinese. / School code: 1307.
| Identifer | oai:union.ndltd.org:cuhk.edu.hk/oai:cuhk-dr:cuhk_343797 |
| Date | January 2005 |
| Contributors | Hu, Bing, Chinese University of Hong Kong Graduate School. Division of Surgery. |
| Source Sets | The Chinese University of Hong Kong |
| Language | English, Chinese |
| Detected Language | English |
| Type | Text, theses |
| Format | electronic resource, microform, microfiche, 1 online resource (xxii, 161, [27] p. : ill.) |
| Rights | Use of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
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