Blood sample taking device

Claim 1

A blood sampling device for obtaining arterial and venous blood samples, said sampling device being configured for use with an evacuated tube of the type having a stopper at one end which is designed to be pierced by a needle, said device comprising: a hub member having a longitudinal conduit, a normally closed valve located in the middle of the conduit for preventing blood flow therethrough, wherein the valve is made of a one piece resilient material, said alve being generally perpendicular to and passing through the conduit, said valve including a lower frusto-conical portion which is normally biased against the conduit to prevent blood flow therethrough and an upper cylindrical portion extending to the outer surface of the hub member, whereby when pressure is applied to the upper portion, it will cause the lower portion to compress and move away from the contact with the conduit, thereby permitting blood to flow around the valve and through the conduit, said hub member further including a cylindrical tube receiving portion at one end; a front needle extending from one end of the conduit, said front needle being configured for insertion into a blood vessel of a patient; and a rear needle extending from the other end of the conduit and into the tube receiving portion, whereby an evacuated tube can be inserted into the tube receiving portion and the stopper punctured by the rear needle prior to insertion of the front needle into a blood vessel without destroying the vacuum conditions of the tube.