Blood sample taking device

• US 4,326,541 A
• Filed: 03/24/1980
• Issued: 04/27/1982
• Est. Priority Date: 03/24/1980
• Status: Expired due to Term

• Current Assignee: Public Systems Research Incorporated
• Original Assignee: Arnold M. Heyman
• Inventors: Eckels, John F.
• Primary Examiner(s): HOWELL, KYLE
• Application Number:
  US06/132,830
• Time in Patent Office: 764 Days
• Field of Search: 128/764, 128/766, 128/768, 128/763, 128/274, 251/334, 251/320, 251/321, 251/DIG. 4
• US Class Current: 600/579
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150488 Details of construction of shaft
• CPC Class Codes: A61B 5/150732 Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube,
• CPC Class Codes: A61B 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• CPC Class Codes: A61B 5/154 Devices using pre-evacuated means
• CPC Class Codes: Y10S 251/903 Needle valves
• CPC Class Codes: Y10S 604/90 Telltale showing entry of blood into body inserted conduit

Abstract

An improved blood sampling device particularly suited for obtaining arterial blood samples. The device includes a molded plastic carrier having front and rear needles and a valve for controlling flow between the needles. The rear needle punctures the stopper of an evacuated sampling tube when it is inserted into the carrier. The front needle is then inserted into the patient and the value, which may be a one piece device made of a resilient material such as polyurethane, is opened to allow blood to be drawn into the sampling tube.

Claims

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.

2. A blood sampling device according to claim 1 wherein said valve includes an indentation on the bottom of the frusto-conical portion and the hub member includes a protrusion which extends into said indentation and biases the valve into a closed position.

3. A blood sampling device according to claim 2 wherein said valve is made of polyurethane.

4. A blood sampling device according to claim 2 wherein said indentation is substantially conical and said protrusion is substantially conical.