Importance

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Abstract

Disclosed is a medical valve apparatus having a valve assembly which comprises a valve seat and a movable valve, and which is arranged in a duct of a medical appliance, wherein a plurality of through holes for the passage of a fluid are formed through the valve seat, the movable valve is composed of a flexible membrane, and the movable membrane is fixed on the valve seat substantially at the central point thereof. The flexible membrane has a corolla-like shape at the time of a forward flow to allow a free flow of the fluid passing in the through holes, and at the time of a back flow, the flexible membrane is wide-spread to adhere to the valve seat and close the through holes whereby the passage of the regurgitation is prevented. Preferably, the peripheral edge of the valve seat is integrated with the inner wall of the duct of the medical appliance without a seam therebetween.

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First Claim