Adjustable diameter hemostatic valve
AssigneeCook Medical Technologies LLC
InventorWilliam F. Moore
Life of this patent
Estimating the term…
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.
Claims20
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 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.
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.
A hemostatic valve device comprising:
- a housing having a first end opening, a second end opening, an interior surface defining a housing cavity disposed between the first and second end openings, and a means for varying a volume of the housing cavity;
- and
- a valve member disposed within the housing cavity and coupled to the housing to define an annular chamber within the housing cavity, the valve member having an inner radial surface defining a channel within the housing cavity extending at least partially between the first and second end openings, the valve member having a substantially incompressible fluid sealed within the annular chamber thereof;
- wherein the volume varying means is configured to move the valve member between an open configuration and a sealed configuration to vary a diameter of the channel.
Dependencies are inferred from the claim text.