Interventional catheter for retrograde use having embolic protection capability and methods of use
First Claim
1. An interventional catheter for use in a vessel, comprising:
- an elongated shaft having an exterior surface, a proximal end, a distal end and a distal region having a diagnostic or therapeutic end effector, and a guide wire lumen extending the distal region;
a filter coupled to the exterior surface of the elongated shaft in the distal region proximal to the end effector, the filter comprising a plurality of struts supporting a filter mesh, each one of the plurality of struts having a proximal end and a distal end, the proximal ends of the plurality of struts coupled to the elongated shaft, the struts configured to transition between a contracted position, wherein the distal ends of the struts contact the exterior surface of the elongated shaft, and an expanded position, wherein the distal ends of the struts contract an interior surface of the vessel and define a distal opening of the filter, the filter and the exterior surface of the elongated shaft cooperating to define a reservoir for retaining emboli captured by the filter; and
a sheath having a distal end slidably disposed on the elongated shaft, the sheath movable from a retracted position, wherein the distal end of the sheath is located proximal of the filter, to an extended position, wherein the distal end of the sheath collapses the filter against the exterior surface of the elongated shaft to seal the reservoir and prevent emboli from passing beyond the distal opening of the filter.
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Accused Products
Abstract
Interventional catheters are disclosed for use in performing diagnostic and therapeutic procedures in vessels that are accessed retrograde to blood flow. The catheters include an elongated shaft slidably disposed within a sheath, a distal region having an end effector and a filter disposed proximal to the end effector to capture emboli liberated during the diagnostic or therapeutic procedure. The filter includes a plurality of struts that cooperate with an exterior surface of the catheter to define a reservoir to retain captured emboli, the reservoir configured so that advancement of the sheath contracts the filter without squeezing or dislodging captured emboli beyond a distal end of the filter.
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Citations
25 Claims
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1. An interventional catheter for use in a vessel, comprising:
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an elongated shaft having an exterior surface, a proximal end, a distal end and a distal region having a diagnostic or therapeutic end effector, and a guide wire lumen extending the distal region;
a filter coupled to the exterior surface of the elongated shaft in the distal region proximal to the end effector, the filter comprising a plurality of struts supporting a filter mesh, each one of the plurality of struts having a proximal end and a distal end, the proximal ends of the plurality of struts coupled to the elongated shaft, the struts configured to transition between a contracted position, wherein the distal ends of the struts contact the exterior surface of the elongated shaft, and an expanded position, wherein the distal ends of the struts contract an interior surface of the vessel and define a distal opening of the filter, the filter and the exterior surface of the elongated shaft cooperating to define a reservoir for retaining emboli captured by the filter; and
a sheath having a distal end slidably disposed on the elongated shaft, the sheath movable from a retracted position, wherein the distal end of the sheath is located proximal of the filter, to an extended position, wherein the distal end of the sheath collapses the filter against the exterior surface of the elongated shaft to seal the reservoir and prevent emboli from passing beyond the distal opening of the filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A catheter for use in an interventional or diagnostic procedure in a vessel, the catheter comprising:
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an elongated shaft having a exterior surface and a distal region having a diagnostic or therapeutic end effector and a guide wire extending through the distal region;
a filter coupled to the elongated shaft in the distal region proximal to the end effector, the filter having a delivery position, wherein the filter is contracted distal against the exterior surface of the elongated shaft, and a deployed position, wherein a distal edge of the filter contacts an interior surface of the vessel, the filter and the exterior surface of the elongated shaft cooperating to define a reservoir for retaining emboli captured by the filter; and
a sheath having a distal end slidably disposed on the elongated shaft, the sheath movable from a retracted position, wherein the distal end of the sheath is located proximal of the filter, to an extended position, wherein the distal end of the sheath causes the filter to contact the exterior surface to seal the reservoir and prevent dislodgement of emboli beyond the distal edge of the filter. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification