| abstract |
A first object of the invention is to provide a medical device capable of effectively preventing backwards flow of blood. n A first aspect of the invention is a medical device including a check valve therein, the check valve including: a valve holder that has a tapered pipe, and a small diameter pipe connecting to a small diameter opening of the tapered pipe and extending outwards, a larger diameter opening of the tapered pipe being fluid-tightly fitted to an inner surface of a medical device; and a flexible valve body that is fitted to an outer peripheral surface of the small diameter pipe of the valve holder, and has a slit that is opened by fluid pressure from a large diameter opening side of the tapered pipe, or by a lateral pressure, but closed by a fluid pressure from a small diameter pipe side. |