Hemostasis valve

• US 5,041,095 A
• Filed: 12/22/1989
• Issued: 08/20/1991
• Est. Priority Date: 12/22/1989
• Status: Expired due to Term

• Current Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Littrell, Perry K.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Lewis, Ralph A.
• Application Number:
  US07/455,956
• Time in Patent Office: 606 Days
• Field of Search: 604/167, 604/169, 604/247, 604/256, 604/237, 251/149.1, 138/849
• US Class Current: 604/167.04
• 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 2039/0686 comprising more than one seal
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence
• CPC Class Codes: Y10T 137/7885 Multiple slit

Abstract

A hemostasis valve comprises a housing defining a passage therethrough adpated to receive an elongated member such as a catheter in hemostatically sealed condition. An elastic gasket valve is carried in the housing having slit means capable of permitting the elongated member to extend through the housing and the gasket member in hemostatically sealed condition. By this invention the gasket member defines a pair of opposed sides with a first slit extending inwardly of the gasket member from one of the opposed sides. A second slit extends inwardly of the gasket member from the other of the opposed sides. Both of the slits are of a shape defining a plurality of radii extending from a common origin. The first and second slits extend inwardly at a depth to engage but not to intersect each other, and the radii of the first slit each define an angle of at least 10° to each of the radii of the second slit at points of engagement. By this, an improved hemostasis valve is provided.

Claims

1. A hemostasis valve which comprises a housing defining a passage therethrough adapted to receive an elongated member such as a catheter in hemostatically sealed condition;

and elastic gasket means carried in said housing having slit means capable of permitting an elongated member extending through said housing to also extend through said gasket means, to provide said hemostatically sealed condition, the improvement comprising, in combination;

said elastic gasket means comprising a pair of separate round elastic gaskets abutting along major faces, said abutting, separate elastic gaskets defining a pair of opposed outwardly facing sides, one side on each gasket, a first slit extending inwardly of said gaskets from one of said opposed sides, said first slit being of a shape defining a plurality of radii extending from a common origin;

a second slit extending inwardly of said gaskets from the other of said opposed sides, said second slit being of a shape defining a plurality of radii extending from a common origin, one of said gaskets defining the first slit extending completely therethrough and the other of said gaskets defining the second slit extending completely therethrough, whereby said first and second slits extend inwardly of said gaskets at a depth to engage but not to intersect each other, each of the first and second slits defining a separate origin that is laterally spaced from the other origin, each of said origins being laterally spaced from the central axis of the round gasket, the radii of the first slit each defining an angle of at least 10°

to each of the radii of the second slit at points of engagement.

2. The hemostasis valve of claim 1 in which the radii of at least one of said first and second slits defining planar slit portions extending in essentially perpendicular relation between said opposed sides.

3. The hemostasis valve of claim 1 in which at least one of said first and second slits define helical section-shaped slit portions extending between said opposed sides.

4. The hemostasis valve of claim 1 in which said first and second slits each define three equiangularly extending radii, and in which adjacent first and second slits define angles of about 60°

to each other.

5. The hemostasis valve of claim 1, in which the radii of at least one of said first and second slits define planar slit portions extending in essentially perpendicular relation between said opposed sides, and in which said first and second slits each define three equiangularly extending radii, and in which adjacent first and second slits define angles of about 60°

to each other.