The utility model relates to a plastic vacuum drainage device.Including: a base plate；One roof；A sealing film,It is enclosed with the top plate and the bottom plate to form a holding space.The accommodation space is communicated with the outside through the drainage inlet and outlet of the roof；One liquid inlet component,With a check valve,So that the fluid can only flow into the holding space from the drainage inlet unidirectionally；A closed member,It includes an extension part extending from the liquid inlet member and a cover connected to the extension part.The cover is used to close the drainage outlet；And an elastic part,The two opposite ends are respectively supported on the top plate and the bottom plate.The elastic parts are plastic or plastic fiber composite.In place of the metal elastic parts used in the conventional wound drainage device,So as to avoid affecting the operation of electronic medical instruments and data interpretation.一種塑膠真空引流裝置，包含：一底板；一頂板；一密封膜，與頂板以及底板圍成一容置空間，容置空間透過頂板的引流入口以及引流出口而與外部連通；一進液構件，具有一止回閥，以使流體僅能單向地從引流入口流入容置空間；一封閉構件，包括一自進液構件延伸出的延接部以及一連接於延接部的蓋子，蓋子用於封閉引流出口；以及一彈性件，其相對二端分別頂抵於頂板與底板，彈性件係為塑膠或係為塑膠與纖維複合材料組合，以取代習知傷口引流裝置所使用的金屬彈性件，從而避免影響電子醫療儀器的運作及數據判讀。
