Needleless adapter

• US 5,242,432 A
• Filed: 09/26/1991
• Issued: 09/07/1993
• Est. Priority Date: 09/26/1991
• Status: Expired due to Term

• Current Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Original Assignee: Ivax Corporation (Teva Pharmaceutical Industries, Ltd.)
• Inventors: DeFrank, Michael P.
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US07/766,603
• Time in Patent Office: 712 Days
• Field of Search: 604/9, 604/122, 604/249, 604/256, 604/283, 604/284, 604/83, 604/27, 604/86, 604/87, 604/247, 251/149.6, 251/337, 251/347, 137/540, 137/543.17, 137/547
• US Class Current: 604/284
• CPC Class Codes: A61M 39/26 Valves closing automatically on disconnecting the line and opening on reconnection thereof check valves A61M39/24

Abstract

A medical valve assembly comprises a valve body having a fluid passage therethrough, a valve member, and an urging means disposed within the fluid passage. The valve member is adapted to seal against a sealing surface of the fluid passage and the urging means is adapted to urge the valve member against the sealing surface. The medical valve can be used without a needle thereby eliminating risks associated with needle stick injuries. In applications where it is expedient to use a needle (such as prepackage medications) the medical valve accommodates the use of a needle to administer medication. The urging means is disclosed in a first embodiment wherein it is formed integral with the head portion of the valve member. In an alternative embodiment, the urging means is separate from the head portion of the valve member and is comprised of a metallic spring element.

Claims

1. A medical valve assembly having a puncturable valve comprising:

a valve body having first and second openings and a first internal wall joining said first and second openings, said first internal wall forming a first fluid passage for communicating a first fluid between said first and second opening, said first internal wall including a seating surface; and

a valve member disposed in and movable within said first fluid passage and adapted to contact said seating surface thereby preventing said first fluid from communicating between said first and second openings through said first fluid passage, wherein said valve member is fabricated from puncturable material;

whereby, when a force of sufficient urging is exerted against said valve member, said valve member is displaced from said seating surfacing thereby permitting said first fluid to communicate between said first and second openings through said first fluid passage, said communication of said first fluid through said first fluid passage also being accomplished by inserting a hypodermic needle through said puncturable valve member, and into said first fluid passage and dispensing said first fluid from said hypodermic needle into said first fluid passage;

urging means disposed in said first fluid passage for urging said valve member against said seating surface;

said valve member and said urging means integrally formed as one piece, said urging means being a membrane concentrically pleated to form an elastic structure which regains its original shape after it has been compressed; and

said valve body further comprises a third opening and a second internal wall, said second internal wall joining said third opening to said first fluid passage, said second internal wall forming a second fluid passage for communicating a second fluid between said third opening and said first fluid passage.

2. The valve assembly of claim 1, wherein said urging means includes a metallic spring.

3. The valve assembly of claim 1, further including means for aligning said urging means within said first fluid passage.

4. The valve assembly of claim 3, wherein said aligning means includes an alignment rail disposed on said internal wall of said first fluid passage and an alignment slot disposed in said urging means, whereby said alignment rail and alignment slot are adapted to cooperatively engage thereby guiding said valve member and maintaining said valve member in a fixed orientation within said first fluid passage.

5. The valve assembly of claim 4, wherein said cooperative engagement between said alignment rail and said alignment slot is sufficiently free to allow said fluid to pass between said alignment rail and said alignment slot.

6. The valve assembly of claim 1, wherein said urging means includes a generally tubular body having a central cavity forming a passage for said first fluid as it travels from said first opening to said second opening.

7. The valve assembly of claim 6, wherein said tubular body of said urging means includes side walls surrounding said central cavity wherein said side walls include holes communicating through said side walls thereby connecting said central cavity of said tubular body to an exterior surface of said tubular body.

8. A normally closed medical valve and tubing connector assembly for introducing and removing fluids from a patient comprising:

a retaining cap having a fluid passage means for conveying fluid through said retaining cap, said retaining cap including first and second openings connected by a first internal wall and alignment rails integral with said first internal wall, and

a valve member dimensioned to fit within said retaining cap, said valve member comprising a head portion dimensioned to sealingly contact but reciprocate within said first entrance opening and a biasing portion dimensioned to sealingly contact but reciprocate within said internal wall, said valve member including a longitudinal slot through said head portion and opposing guide slots running the length of said biasing portion which align said valve member within said retaining cap by engaging said alignment rails of said retaining cap, and

wherein said biasing portion is integral with said head portion, and said valve member is biased within said retaining cap into a position normally closed against ingress fluid flow, and

wherein said biasing portion is a membrane concentrically pleated to form an elastic structure which regains its original shape after being compressed, and

wherein said valve member is aligned within said retaining cap through mating of said alignment rails of said retaining cap into said guide slots, said guide slots being of larger dimension than said alignment rails of said retaining cap creating a flow-through path for fluid transmission between said alignment rails of said retaining cap and said guide slots,

whereby said valve member is actuated by inserting a male connector into said first entrance opening depressing said head portion to allow fluid communication through said retaining cap along a path originating at said first entrance opening through said longitudinal slot, said path extending along said guide slots and terminating at the far end of said internal wall, fluid communication being interruptable by removing the cannula from said first entrance opening which results in the return of said head portion to its normally closed position, and

said valve body further comprises a third opening and a second internal wall, said second internal wall joining said third opening to said first fluid passage, said second internal wall forming a second fluid passage for communicating a second fluid between said third opening and said first fluid passage.