Needleless access port valves

• US 7,510,545 B2
• Filed: 02/09/2005
• Issued: 03/31/2009
• Est. Priority Date: 02/09/2005
• Status: Active Grant

• Current Assignee: B Braun Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Original Assignee: B Braun Medical Incorporated (B. Braun Holding GmbH & Co. KG)
• Inventors: Peppel, Peter W.
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): BERDICHEVSKY, AARTI
• Application Number:
  US11/055,285
• Publication Number:
  US 20060178645A1
• Time in Patent Office: 1,511 Days
• Field of Search: 604/246, 604/249, 604/259, 604/256, 251/149, 251/149.8
• US Class Current: 604/256
• CPC Class Codes: A61M 39/045 pre-slit to be pierced by blunt instrument

Abstract

Needleless access port valves are generally discussed herein with particular discussions extended to needleless access port valves having a pliant valve body configured to expand to accommodate a plug when the same is pushed by a syringe or a medical implement and contract when the syringe or medical implement is removed to return the plug to its original position. The plug can move distally and tilt when inside the pliant valve body or remain generally upright when its top surface incorporates flow channels. Interior baffles are included for fluid flow through the interior cavity of the valve. The baffles can vary in shape, number, contour, and can include a ramp.

Claims

1. A needleless access port valve comprising

a valve body having an interior surface and an exterior surface, the exterior surface further comprising a top wall aligned perpendicular to a central axis of the valve body and a side wall aligned non-perpendicular to the central axis and at an angle to the top wall, the top wall and the side wall both being exposed to ambient atmosphere, said valve body comprising a continuous wall surface along a radial direction, an inlet, an outlet, a main channel about the central axis between the inlet and the outlet, and

a plug disposed in the main channel defined by the interior surface of the valve body and has sections that contact sections of the interior surface of the valve body, all of said sections of the plug that contact the interior surface of the valve body being slidable inside the main channel and movable relative to the sections of the interior surface of the valve body that they contact in sliding from between a first position and a second position for controlling fluid communication between the inlet and the outlet, the plug comprising an upper end and a lower end comprising a tapered section;

wherein the continuous wall surface, including the exterior surface of the valve body, flexibly bends inwardly towards the central axis when the plug is in the first position such that a cross-sectional dimension of the valve body is less than a cross-sectional dimension of the inlet; and

wherein the continuous wall surface, including the exterior surface of the valve body, flexibly bends outwardly away from the central axis and contacting the tapered section when the plug is in the second position.

2. The needleless access port valve of claim 1, further comprising a rigid skeleton shell.

3. The needleless access port valve of claim 1, wherein the top wall of the valve body is fixed in an axial direction and the plug moves away from the top wall in moving to the second position.

4. The needleless access port valve of claim 1, wherein the plug and the inlet is in a Luer to Luer engagement.

5. The needleless access port valve of claim 1, further comprising a plurality of baffles located in the main channel.

6. The needleless access port valve of claim 5, wherein the plurality of baffles comprise four baffles defining four flow paths.

7. The needleless access port valve of claim 1, wherein the plug comprises a top surface and wherein the top surface comprises a plurality of projections.

8. The needleless access port valve of claim 1, wherein the valve body is made from a thermoplastic elastomer (TPE) material.

9. The needleless access port valve of claim 8, wherein the TPE is a copolyamide thermoplastic elastomer.

10. The needleless access port valve of claim 1, wherein the valve body is over molded to a rigid shell and wherein the rigid shell comprises a threaded collar and a threaded inlet section.

11. The needleless access port valve of claim 1, further comprising a plurality of baffles positioned, at least in part, inside the main channel, and wherein the plurality of baffles each extends axially and radially from the inlet towards the outlet.

12. A needleless access port valve comprising a valve body defining an interior cavity, the valve body having an inlet sized to receive a medical implement when the medical implement is inserted into the inlet to open the valve, and an outlet;

a plug disposed in the interior cavity of the valve body and movable within the interior cavity between a first position and a second position for controlling fluid communication between the inlet and the outlet, said inlet and outlet of the body being in fixed relative axial position in both the plug first and second positions,

said plug comprising a top surface having a solid core positioned proximate the inlet for forcing fluid to flow around the plug and a valve body section comprising a flexible wall;

wherein the flexible wall expands outwardly to accommodate the plug when the plug moves to the second position inside the valve body and away from the inlet.

13. The needleless access port valve of claim 12, further comprising a rigid skeleton shell.

14. The needleless access port valve of claim 13, wherein the valve body is over molded to the rigid skeleton shell.

15. The needleless access port valve of claim 12, wherein the plug comprises a upper section and a lower section and wherein the lower section comprises a taper.

16. The needleless access port valve of claim 15, wherein the flexible wall contracts against the taper lower section to push the plug back to the first position.

17. The needleless access port valve of claim 12, wherein the valve body comprises an exterior surface and an interior surface, and wherein the exterior surface is exposed to ambient atmosphere.

18. The needleless access port valve of claim 12, further comprising a plurality of baffles positioned in the interior cavity of the valve body.

19. The needleless access port valve of claim 12, wherein the valve body is made from a TPE material.

20. The needleless access port valve of claim 19, wherein the TPE is a copolyamide thermoplastic elastomer.

21. The needleless access port valve of claim 12, wherein the plug moves from the second position to the first position without a resilient spring.

22. A needleless access port valve comprising

a valve body defining an interior cavity including a wall, an inlet having a continuous opening and sized to surround a medical implement when the medical implement is inserted into the inlet, and an outlet having an annular opening;

a plug disposed in the interior cavity of the valve body and slidable within the interior cavity between a first position and a second position for controlling fluid communication between the inlet and the outlet;

wherein the plug comprises a solid top surface, which is positioned proximate the inlet of the valve body in the first position, for forcing fluid to flow around the top surface and around a side exterior surface of the plug;

wherein the wall contracts to move the plug from the second position to the first position, and the plug in the first position being further apart from the outlet than when in the second position.

23. The needleless access port valve of claim 22, further comprising a rigid skeleton shell having spaced apart rigid structures defining a gap therebetween.

24. The needleless access port valve of claim 22, wherein the plug comprises an area of a larger cross-sectional dimension nearer the inlet than an area of cross-section nearer the outlet.

25. The needleless access port valve of claim 22, wherein the valve body is made from a TPE material.