Medical valve, catheter with valve, and catheter assembly

• US 5,149,327 A
• Filed: 08/15/1990
• Issued: 09/22/1992
• Est. Priority Date: 09/05/1989
• Status: Expired due to Term

• Current Assignee: Terumo Kabushiki Kaisha
• Original Assignee: Terumo Kabushiki Kaisha
• Inventors: Oshiyama, Hiroaki
• Primary Examiner(s): Mancene, Gene
• Assistant Examiner(s): Lynch, Michael
• Application Number:
  US07/568,198
• Time in Patent Office: 769 Days
• Field of Search: 604/164, 604/167, 604/169, 604/247, 604/256, 251/149.1, 137/843, 137/844, 137/849
• US Class Current: 604/167.04
• CPC Class Codes: A61M 2039/0036 characterised by a septum having particular features, e.g. having venting channels or being made from antimicrobial or self-lubricating elastomer
• CPC Class Codes: A61M 2039/062 used with a catheter
• CPC Class Codes: A61M 2039/0633 the seal being a passive seal made of a resilient material with or without an opening
• CPC Class Codes: A61M 2039/064 Slit-valve
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence

Abstract

A medical valve comprises a valve member made of a flexible elastic material and having at least two faces. A first slit is disposed between a first face of said at least two faces and a second face of said at least two faces, and a second slit is disposed between said first face and said second face, wherein the first slit and the second slit intersect each other. A first opening width of the first slit on the first face is different from a second opening width of the first slit on the second face, and a first opening width of the second slit on the first face is different from a second opening width of the second slit on the second face. A catheter assembly comprises a catheter and a connecting instrument. The catheter includes a hollow body introducible into a blood vessel and a proximal member communicating with a hollow portion of the hollow body, the proximal member having an introduction passage in which a valve is disposed therein. The connecting instrument includes a tubular portion connectable to the introduction passage and insertable in a liquid sealing manner through the valve disposed in the introduction passage. The distal end of the tubular portion of the connecting instrument is disposed adjacent to an inner surface of the interior of the hollow body of the catheter when the connecting instrument is connected to the introduction passage of the proximal member of the catheter.

Claims

1. A medical valve comprising:

a valve member made of a flexible elastic material and having at least two faces;

a first slit disposed between a first face of said at least two faces and a second face of said at least two faces; and

a second slit disposed between said first face and said second face;

wherein said first slit and said second slit intersect each other;

wherein a first opening width of said first slit on said first face is different from a second opening width of said first slit on said second face; and

wherein a first opening width of said second slit on said first face is different from a second opening width of said second slit on said second face.

2. A medical valve according to claim 1, wherein:

the first opening width of said first slit on said first face is longer than the second opening width of said first slit on said second face; and

the second opening width of said second slit on said second face is longer than the first opening width of said second slit on said first face.

3. A medical valve according to claim 2, wherein said first and second slits cross each other.

4. A medical valve according to claim 2, wherein one of said first and second slits terminates at the other of said first and second slits.

5. A medical valve according to claim 1, wherein:

the first opening width of said first slit on said first face is longer than the second opening width of said first slit on said second face; and

the first opening width of said second slit on said first face is longer than the second opening width of said second slit on said second face.

6. A medical valve according to claim 5, wherein said first and second slits cross each other.

7. A medical valve according to claim 5, wherein one of said first and second slits terminates at the other of said first and second slits.

8. A medical valve according to claim 1, wherein said first and second slits cross each other.

9. A medical valve according to claim 1, wherein one of said first and second slits terminates at the other of said first and second slits.

10. A catheter with a medical valve, comprising:

an elongated hollow body having an opening at a distal end thereof;

a proximal member coupled to a proximal end of said hollow body, said proximal member having an introduction passage and communicating with the interior of said hollow body; and

a medical valve disposed in said introduction passage of said proximal member, said medical valve comprising;

a valve member made of a flexible elastic material and having at least two faces;

a first slit disposed between a first face of said at least two faces and a second face of said at least two faces; and

a second slit disposed between said first face and said second face;

wherein said first slit and said second slit intersect each other;

wherein a first opening width of said first slit on said first face is different from a second opening width of said first slit on said second face; and

wherein a first opening width of said second slit on said first face is different from a second opening width of said second slit on said second face.

11. A catheter assembly with a medical valve, comprising:

a catheter including a hollow body introducible into a blood vessel, and a proximal member having an introduction passage and communicating with the interior of said hollow body;

a medical valve disposed in said introduction passage, said medical valve comprising;

a valve member made of a flexible elastic material and having at least two faces;

a first slit disposed between a first face of said at least two faces and a second face of said at least two faces; and

a second slit disposed between said first face and said second face;

wherein said first slit and said second slit intersect each other;

wherein a first opening width of said first slit on said first face is different from a second opening width of said first slit on said second face; and

wherein a first opening width of said second slit on said first face is different from a second opening width of said second slit on said second face; and

a connecting instrument including a tubular portion connectable to said introduction passage and insertable in a liquid sealing manner through said medical valve disposed in said introduction passage, wherein a distal end of said tubular portion of said connecting instrument is disposed adjacent to an inner surface of the interior of said hollow body of said catheter when said tubular portion is inserted through said medical valve to be connected to said introduction passage of said proximal member of said catheter.

12. A catheter assembly with a medical valve according to claim 11, wherein:

the first opening width of said first slit on said first face is longer than the second opening width of said first slit on said second face; and

the second opening width of said second slit on said second face is longer than the first opening width of said second slit on said first face.

13. A catheter assembly with a medical valve according to claim 11, wherein:

the first opening width of said first slit on said first face is longer than the second opening width of said first slit on said second face; and

the first opening width of said second slit on said first face is longer than the second opening width of said second slit on said second face.

14. A catheter assembly according to claim 11, wherein said tubular portion of said connecting instrument is tapered so that the diameter thereof is decreased toward the distal end thereof.

15. A catheter assembly according to claim 14, wherein said tubular portion of said connecting instrument tapers at a tapering angle from 5 to 15 degrees.

16. A catheter assembly according to claim 14, wherein said tapered tubular portion of said connecting instrument contacts said valve disposed in said introduction passage of said proximal member of said catheter.