Hemostasis valve

• US 5,273,546 A
• Filed: 04/08/1992
• Issued: 12/28/1993
• Est. Priority Date: 08/01/1991
• Status: Expired due to Fees

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: McLaughlin, Brian E., Johnson, Thomas R.
• Primary Examiner(s): Wilson, John J.
• Application Number:
  US07/865,383
• Time in Patent Office: 629 Days
• Field of Search: 604/167, 604/169, 604/237, 604/244, 604/256, 604/278, 137/843, 137/845, 137/849, 251/149.1
• 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 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 self-sealing, penetrable, hemostasis valve for a catheter introducer or the like which comprises an elastomeric gasket member having first and second opposed faces adapted to be secured in a valve housing, wherein faces define generally concave surfaces to reduce the central thickness of the gasket member, and a pin hole or slits extending through the first and second opposed faces generally at or through the central region of the gasket member. The generally concave opposed face surfaces are molded to possess a pair of convex cusp-shaped surfaces, each lying in about one-half of the generally concave surfaces, each convex cusp having an edge thereof passing generally through the central region of reduced thickness. The pair of generally convex, cusp-shaped surfaces on the first face is disposed at a 90 degree angle to the pair of generally convex, cusp-shaped surfaces on the second face. Preferably short intersecting slits extend through the reduced thickness central region oriented at a 45 degree angle to the 90 degree lines of intersection of the mating edges of the first and second cusp-shaped surfaces on each face of the elastomeric gasket member.

The hemostasis valve of the present invention is preferably implemented in a percutaneous introducer comprising a longitudinally extended housing having a proximal open end for providing an entrance point for the introduction of elongated interventional devices and a second distal open end. An elongated tubular sheath is coupled to and extends distally from distal open end of housing. The hemostasis valve is located within the central passageway of the longitudinally extended housing, and proximal to a side port into the housing.

Claims

1. A valve for a fluid flow path comprising:

a one-piece seal having a general disk-shape with opposed first and second surfaces, a central region having a pin hole or slit extending between said surfaces and a peripheral region adapted to be coupled in a sealing relation with said fluid flow path for normally sealing the flow of fluid therethrough, wherein said first and second surfaces are generally concave and provide a central area with a thickness reduced from the periphery thereof, each of said concave surfaces further comprising a pair of convex cusp surfaces, each having intersecting edges extending from the periphery to the central region of each face of said seal means, whereby said seal means receives and seals around the periphery of a device introduced through said pin hole or slit.