Adjustable diameter hemostatic valve

Patent metadata

Field	Value
Publication number	US-9440059-B2
Application number	US-201213409496-A
Country	US
Kind code	B2
Filing date	Mar 1, 2012
Priority date	Mar 18, 2011
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

A hemostatic valve device for use in inserting an interventional device into a body lumen of a patient. The valve device includes a housing that defines a cavity between first and second end openings. A valve structure is disposed within the cavity, and defines a variable diameter channel for receiving the interventional device. An annular chamber is generally formed between the valve structure and the housing inner surface, and can be filled with fluid. The housing is movable between first and second positions so that the volume of the cavity and the diameter of the channel vary to a degree for the valve structure to form a seal along the interventional device inserted within the channel. The valve structure may be configured to seal without substantial twisting.

First claim

What is claimed is:

1. A hemostatic valve device comprising: a housing having a first end opening, a second end opening, and an interior surface defining a housing cavity between the first and second end openings; a valve structure disposed within the housing cavity and coupled to the housing to define an annular chamber within the housing cavity, the valve structure having an inner radial surface defining a longitudinal tubular channel within the housing cavity at least partially between the first and second end openings; wherein the housing is movable between a first configuration whereby the housing cavity has a first volume and the channel has a first diameter, and a second configuration whereby the first and second end openings are closer to one another, the housing cavity has a second volume that is less than the first volume, and the channel has a second diameter that is less than the first diameter; wherein the annular chamber has a substantially constant volume in the first configuration when the housing cavity has a first volume and in the second configuration when the housing cavity has a second volume that is less than the first volume.

2. The device of claim 1 , wherein the annular chamber has a constant volume.

3. The device of claim 1 , wherein the annular chamber includes a substantially incompressible fluid.

4. The device of claim 1 , wherein the valve structure further comprises a toroidal valve structure.

5. The device of claim 1 , wherein the valve structure further comprises a ring segment formed along an axial end of the valve structure, the ring segment being configured to remain in engagement with the interior surface of the housing during movement of the housing.

6. The device of claim 5 , wherein the valve structure further comprises a sealing member, the interior surface of the housing including an inner groove formed therein to receive the sealing member, the sealing member disposed along a portion of the ring segment and received within the inner groove.

7. The device of claim 1 , wherein the housing further comprises a first portion and a second portion, and wherein relative axial movement between the first and second portions causes movement of the housing between the first and second configurations.

8. The device of claim 7 , wherein the first and second portions are threadably engaged with one another so that relative rotation between the first and second portions causes movement of the housing between the first and second configurations.

9. The device of claim 7 , wherein the first and second portions of the housing are engaged in a ratchet manner with one another so that relative axial sliding between the first and second portions causes movement of the housing between the first and second configurations.

10. The device of claim 7 , wherein the valve structure comprises a first end coupled to the first portion and a second end coupled to the second portion, wherein one of the first and second ends of the valve structure is securely fixed to the respective first or second portions, and the other of the first or second ends is coupled to the respective first or second portions to prevent substantial twisting of the valve structure in response to relative axial movement between the first portion and the second portion.

11. A hemostatic valve device comprising: a housing having a first end opening, a second end opening, and an interior surface defining a housing cavity disposed between the first and second end openings, the housing including an end cap and a cannula body; a bladder structure disposed within the housing cavity and coupled between the end cap and the cannula body of the housing to define a substantially constant volume annular chamber within the housing cavity, the bladder structure having an inner radial tubular surface defining a channel within the housing cavity at least partially between the first and second end openings; and a fluid disposed within the annular chamber of the bladder structure; where relative axial movement between the end cap and the cannula body varies a volume of the housing cavity and displaces the bladder structure between an open configuration and a sealed configuration to move the channel between a first diameter and a second diameter, respectively;
wherein the end cap is movable relative to the housing body between a first position, whereby the fluid exerts a first pressure on the valve structure in the open configuration, and a second position, whereby the fluid exerts a second pressure on the valve structure in the sealed configuration that is greater than the first pressure.

12. The device of claim 11 , wherein the bladder structure further comprises a ring portion along one end of the bladder structure, and a sealing apron extending axially from the ring portion to engage an inner surface of the cannula body.

13. The device of claim 12 , wherein the interior surface of the housing includes an inner groove, and an end portion of the bladder structure comprises a radial protruding ring that is received within the inner groove to form the mechanical seal between the bladder structure and the housing.

14. The device of claim 13 , wherein the inner groove is disposed longitudinally relative to the annular chamber of the bladder structure so that an increase in fluid pressure within the bladder structure increases the radial pressure of the radial protruding ring within the inner groove.

15. The device of claim 11 , wherein the end cap has an end portion that is spaced from a corresponding outer surface of the cannula body, where the end portion and the corresponding outer surface comprises a ratcheting mechanism to selectively inhibit relative movement between the end cap and the cannula body.

Assignees

• Moore William F
• Cook Medical Technologies Llc

Inventors

• Moore William F

Classifications

• A61M39/0613 Primary

  with means for adjusting the seal opening or pressure (A61M39/0693 takes precedence) · CPC title