Catch member for PFO occluder
First Claim
1. A collapsible medical device for occluding an aperture in a body, the medical device having a first configuration as a reduced profile and a second configuration as an expanded profile, the medical device being adapted to be delivered through a delivery system into a desired delivery location, the medical device comprising:
- an occluder portion movable between the first and the second configuration, wherein the occluder portion comprises a proximal end, a distal end, and an axial passage between the proximal end and the distal end, the axial passage having an inner diameter;
a catch member adapted to be disposed in the axial passage of the occluder portion, wherein the catch member comprises a catch body having a proximal portion and a distal flange,wherein the distal flange of the catch member engages the distal end of the occluder portion,wherein the catch body has a tapered or graduated cylindrical profile composed of a distal section having a first diameter D1 and a proximal section having a second diameter D2 joined by a sloped section, wherein diameter D2 is similar to the inner diameter of the axial passage of the occlude portion; and
,wherein the proximal portion of the catch body of the catch member further comprises two compressible prongs each comprising a proximal tip and a proximal ridge on the surface of the prong, wherein the proximal tip is adapted for connection to a delivery system; and
the proximal ridge is adapted to pass through the axial passage of the occluder portion while the compressible prongs are held in a compressed position and to engage the proximal end of the occluder portion thereby holding the medical device in the second configuration.
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Accused Products
Abstract
Delivery (and recovery) devices and techniques for delivering an implant into a desired location within the body and catch systems for such implants. The devices and techniques relate particularly to, but are not limited to, a patent foramen ovale (PFO) occluder made from a polymer tube. A catch system maintains an occluder in a deployed configuration by holding it in a reduced axial length position. Some embodiments have a compressible tip. Some embodiments have temporary catching mechanisms.
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Citations
6 Claims
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1. A collapsible medical device for occluding an aperture in a body, the medical device having a first configuration as a reduced profile and a second configuration as an expanded profile, the medical device being adapted to be delivered through a delivery system into a desired delivery location, the medical device comprising:
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an occluder portion movable between the first and the second configuration, wherein the occluder portion comprises a proximal end, a distal end, and an axial passage between the proximal end and the distal end, the axial passage having an inner diameter; a catch member adapted to be disposed in the axial passage of the occluder portion, wherein the catch member comprises a catch body having a proximal portion and a distal flange, wherein the distal flange of the catch member engages the distal end of the occluder portion, wherein the catch body has a tapered or graduated cylindrical profile composed of a distal section having a first diameter D1 and a proximal section having a second diameter D2 joined by a sloped section, wherein diameter D2 is similar to the inner diameter of the axial passage of the occlude portion; and
,wherein the proximal portion of the catch body of the catch member further comprises two compressible prongs each comprising a proximal tip and a proximal ridge on the surface of the prong, wherein the proximal tip is adapted for connection to a delivery system; and
the proximal ridge is adapted to pass through the axial passage of the occluder portion while the compressible prongs are held in a compressed position and to engage the proximal end of the occluder portion thereby holding the medical device in the second configuration. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification