BLOOD COLLECTING SHUT-OFF VALVE

• US 3,734,080 A
• Filed: 10/16/1970
• Issued: 05/22/1973
• Est. Priority Date: 06/12/1969
• Status: Expired due to Term

• Current Assignee: Walter Sarstedt
• Original Assignee: Dewitt R. Petterson, Henry A.W. Kipp, John S. Assenza
• Inventors: Petterson, Dewitt R., Assenza, John S., Kipp, Henry A. W.
• Primary Examiner(s): Howell, Kyle L.
• Application Number:
  US05/081,352
• Time in Patent Office: 949 Days
• Field of Search: 128/2F,2R,2G,DIG.5,276,215,214.2,221 206/65K 220/63,65 251/5
• US Class Current: 600/577
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150221 Valves
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150351 Caps, stoppers or lids for sealing or closing a blood collection vessel or container, e.g. a test-tube or syringe barrel caps for bottles or containers in general B65D41/00
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/15048 Details of construction of proximal end
• CPC Class Codes: A61B 5/150488 Details of construction of shaft
• CPC Class Codes: A61B 5/150496 Details of construction of hub, i.e. element used to attach the double-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/150572 Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• CPC Class Codes: A61B 5/150603 by rotation, e.g. bayonet or screw
• CPC Class Codes: A61B 5/150717 manually removed
• 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 5/154 Devices using pre-evacuated means
• CPC Class Codes: A61B 5/155 Devices specially adapted for continuous or multiple sampling, e.g. at predetermined intervals devices loaded with multiple lancets simultaneously A61B5/15146
• CPC Class Codes: A61M 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001

Abstract

A blood collecting shut-off valve adapted to be placed over that portion of a double-ended blood collecting needle used for puncturing a vacuum container for blood collection. The shut-off valve comprises a flexible tubular needle sheath unattached to the needle hub, having a closed pierceable end adjacent to the needle point and needle contacting means on the inner surface of the sheath adjacent to the point of the needle and pressing against the needle cannula to serve as a seal against the passage of blood toward the open end of the sheath and to maintain the sheath on the needle surface. The sheath is composed of a material having the ability to distort under compression when the pierceable end of the sheath and the stopper of the vacuum container are pierced by the point of the needle and the needle cannula enters the vacuum container, with the sheath returning to its original position covering and sealing off the needle point after removal of the vacuum container from the needle.

Claims

1. A blood collecting shut-off valve unit, comprising:

a hollow needle with piercIng points at both ends and a hub intermediate said ends for attaching said unit to a holder; and

an elastomeric tubular sheath extending over one of said needle ends from said piercing point to the base of said hub, said sheath having a closed pierceable end adjacent the piercing point on said one end and an open end adjacent said hub, the inner surface of said sheath having means contacting the exterior surface of said needle adjacent the piercing point on said one end to provide slidable contact between said needle surface and said sheath and to provide a fluid seal for the space between the closed end of said sheath and said needle contacting means, said inner surface being entirely spaced from said needle surface and said sheath being entirely unsecured to said needle and said hub except for said needle contacting means.

2. The valve of claim 1 wherein said needle contacting means comprises at least one continuous needle contacting member.

3. The valve of claim 2 wherein said needle contacting member is an inwardly projecting ring.

4. The valve of claim 3 wherein said ring is formed integral with said inner surface at a right angle to the longitudinal axis of said sheath.

5. The valve of claim 4 wherein said needle contacting means comprises a plurality of spaced circumferential rings.

6. The valve of claim 1 wherein said closed end is substantially flat.

7. The valve of claim 6 wherein means are provided to reduce the adhesion between the external surface of said flat closed end and a sheath compressing member.

8. The valve of claim 7 wherein said adhesion reducing means is at least one raised projection integral with said flat closed end.

9. The valve of claim 8 wherein said projection is a raised rib extending diametrically across said end.

10. The valve of claim 8 wherein said projection is a plurality of spaced buttons.

11. The blood collecting unit of claim 1, wherein said needle contacting means is a continuous circumferential constriction of said inner surface and the remainder of said inner surface tapers outwardly from said constriction to said open end of said sheath.

12. The blood collecting unit of claim 11, wherein the closed end of said sheath is substantially flat and at least one raised projection is formed on said flat end.

13. The blood collecting unit of claim 12, wherein said projection is a raised rib extending diametrically across said end.

14. The blood collecting unit of claim 12, wherein said projection is a plurality of spaced buttons.