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OwnerNobuo Enomoto, Norio Miyagi +3inventors
InventorsNobuo Enomoto, Norio Miyagi, Koki Okanda, Mitsuji Hosoda, Kazuo Yamada
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A first object of the invention is to provide a medical device capable of effectively preventing backwards flow of blood. 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.
A medical device comprising a check valve therein,
A medical device comprising:
A medical side branch pipe in which a first straight pipe and a second straight pipe are arranged on a line, and one or more side branches intersect the first straight pipe and the second straight pipe at a confluence and communicate with each other, wherein at least one side branch has a check valve therein such that a fluid and a gas from a free end of the side branch to the confluence pass, but a fluid and a gas from the confluence to the free end are blocked and do not flow.
A medical side branch pipe in which a first straight pipe and a second straight pipe are arranged on a line, and one or more side branches intersect the first straight pipe and the second straight pipe at a confluence and communicate with each other, wherein at least one side branch has a check valve therein, part of a side surface of the side branch near the check valve is a flexible portion made of an elastic material, and when the flexible portion is not pressed, a fluid and a gas from a free end of the side branch to the confluence pass, but a fluid and a gas from the confluence to the free end are blocked and do not flow, while when the flexible portion is pressed, the fluid and the gas pass from the confluence to the free end.
Dependencies are inferred from the claim text.