Vascular filter delivery systems and methods
First Claim
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1. A filter deployment assembly, comprising:
- a delivery sheath;
a filter coupling mechanism;
the filter coupling mechanism comprising an actuating member and an outer member, wherein the filter coupling mechanism is axially displaceable within the delivery sheath;
the filter deployment assembly further comprising,a coupling actuator coupled to the filter coupling mechanism, wherein actuation of the coupling actuator is configured to decouple a filter with respect to the filter deployment assembly;
a first biasing member operatively disposed between the coupling actuator and a biasing member perch; and
a second biasing member operatively disposed between the biasing member perch and a biasing member perch stop;
wherein the filter coupling mechanism is configured to attach to the filter independent of the delivery sheath, the filter coupling mechanism configured to engage the filter through radial expansion of the outer member due to relative proximal displacement of the actuating member with respect to the outer member, the filter coupling mechanism actuatable to release the filter, the actuating member actuatable from a proximal end of the filter deployment assembly,wherein the actuating member comprises a tapered section,wherein the filter coupling mechanism is configured to disengage the filter through radial retraction of the outer member due to relative distal displacement of the tapered section with respect to the outer member, andwherein the biasing member perch is displaceable with respect to the biasing member perch stop when the coupling actuator is in a first position and the biasing member perch is fixed with respect to the biasing member perch stop when the deployment actuator is in a second position.
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Abstract
A filter configured to be disposed within the vasculature to capture or trap material within a body lumen is disclosed. The filter may be configured to be removable and may be configured to slice through ingrown or encapsulated tissue during removal. A filter deployment device or system which may be configured to deliver a filter or filters to a position within a body lumen, such as within the vasculature, is also disclosed. The filter deployment device may be configured to limit inadvertent decoupling of a filter. Also, the filter deployment device may be configured to retrieve a deployed filter.
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Citations
19 Claims
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1. A filter deployment assembly, comprising:
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a delivery sheath; a filter coupling mechanism; the filter coupling mechanism comprising an actuating member and an outer member, wherein the filter coupling mechanism is axially displaceable within the delivery sheath;
the filter deployment assembly further comprising,a coupling actuator coupled to the filter coupling mechanism, wherein actuation of the coupling actuator is configured to decouple a filter with respect to the filter deployment assembly; a first biasing member operatively disposed between the coupling actuator and a biasing member perch; and a second biasing member operatively disposed between the biasing member perch and a biasing member perch stop; wherein the filter coupling mechanism is configured to attach to the filter independent of the delivery sheath, the filter coupling mechanism configured to engage the filter through radial expansion of the outer member due to relative proximal displacement of the actuating member with respect to the outer member, the filter coupling mechanism actuatable to release the filter, the actuating member actuatable from a proximal end of the filter deployment assembly, wherein the actuating member comprises a tapered section, wherein the filter coupling mechanism is configured to disengage the filter through radial retraction of the outer member due to relative distal displacement of the tapered section with respect to the outer member, and wherein the biasing member perch is displaceable with respect to the biasing member perch stop when the coupling actuator is in a first position and the biasing member perch is fixed with respect to the biasing member perch stop when the deployment actuator is in a second position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification