Design and development practice of semiautomatic flap microvascular anastomosis device
| Autor: | Kun-Chun Chen, 陳坤駿 |
|---|---|
| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 Microvascular anastomosis is a common operation, which is used for flap reconstruction, limb replantation, organ transplantation, etc. Anastomosing blood vessels by suture is quite a challenge in clinical due to the very small diameter of the capillary(≦3.0mm). Therefore, the vascular coupler is often used for vessel anastomotic through the mechanism nowadays. However, the problem faced by the clinical use of the commercial product is the difficulty in flapping the vessel since the vascular wall needs to be flapped onto the needles of the ring of the vascular coupler one by one, and it takes more than half time of the overall. In order to solve the problem. This study is intended to propose a semiautomatic flapping design by the expand-flap concept to overcome the difficulty in vessel flapping. In this study, We developed a set of the vascular coupler (contains expander、flapper、anastomosis ring and sleeve)、grip handles and experimental platform for the blood vessels with an inner diameter of 1.0mm. The actuation method of the vascular coupler is as follow: (1) Encase the vessel to the expander; (2)Expand the vessel wall to a bell mouth by the expander; (3)The flapper shove to turn the vessel wall 180° to be fixed onto the anastomosis ring; (4)The anastomosis ring is engaged with the sleeve to complete the vascular anastomosis. The vascular coupler was manufacture by precision machining and verification the expand-flap concept by the artificial vessel. After confirming the device is feasible, stretching the artificial vessel that has completed the anastomotic. According to the results of the mechanism verification, we achieved the concept of a semiautomatic flap. The artificial vessel has been successfully turned over to the anastomosis ring by the expand-flap concept without manual eversion. And the in vitro functional test result shows that when the artificial vessel is stretched about three times longer, the diameter and color of the vessel can be found to be severely damaged before it is separated from the anastomosis. Therefore, it is determined that the artificial vessel is effective in the anastomosis. In this study, a semiautomatic flap microvascular anastomosis device has been developed. Through the mechanism verification, its success to semiautomatic flap the artificial vessel to solve the difficulty in flapping the vessel with commercial product. And confirmed the effectiveness of artificial vessel with stable anastomosis by in vitro functional testing. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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