Delivery system for deployment of medical devices
First Claim
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1. An apparatus for minimally invasively delivering a medical device to a target site within a patient, the apparatus comprising:
- an inner tube having an outside surface suitable for accepting a medical device collapsed thereon in a stationary position;
an outer tube movable relative to the inner tube and incorporated therewith; and
a sheathing material having a first end affixed to a collar attached to the inner tube and a second end affixed to an outside distal end of the outer tube so that a portion of the sheathing material may cover at least some of the medical device when loaded on the apparatus, the inner and outer tubes being aligned concentrically so as to create an inversion point in the sheathing material when one tube is moved relative to the other tube;
wherein the inverted portion of the sheathing material covering at least a portion of the medical device comprises an inside layer and an outside layer, the outside layer overlapping the inside layer, the outside layer being adjacent to the inside layer such that no portion of the outer tube is between any portion of the inside layer and any portion of the outside layer that covers the portion of the medical device loaded on the apparatus and such that the outside layer contacts the inside layer; and
wherein the apparatus is configured so that movement of one tube relative to the other tube causes the inversion point to move relative to the medical device when loaded on the apparatus so as to expose the medical device to expansion when it is desired that the medical device expand at a target site.
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Abstract
A catheter that comprises a sheath that is connected at opposing ends to concentric tubes that move relative to each other in a manner that alternatively covers and exposes a medical device loaded onto the catheter. A portion of the sheath is arranged so as to invert upon itself so that axial movement of one tube relative to the other simultaneously moves the inversion point over or away from the device, alternatively covering or exposing the device.
788 Citations
16 Claims
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1. An apparatus for minimally invasively delivering a medical device to a target site within a patient, the apparatus comprising:
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an inner tube having an outside surface suitable for accepting a medical device collapsed thereon in a stationary position; an outer tube movable relative to the inner tube and incorporated therewith; and a sheathing material having a first end affixed to a collar attached to the inner tube and a second end affixed to an outside distal end of the outer tube so that a portion of the sheathing material may cover at least some of the medical device when loaded on the apparatus, the inner and outer tubes being aligned concentrically so as to create an inversion point in the sheathing material when one tube is moved relative to the other tube; wherein the inverted portion of the sheathing material covering at least a portion of the medical device comprises an inside layer and an outside layer, the outside layer overlapping the inside layer, the outside layer being adjacent to the inside layer such that no portion of the outer tube is between any portion of the inside layer and any portion of the outside layer that covers the portion of the medical device loaded on the apparatus and such that the outside layer contacts the inside layer; and wherein the apparatus is configured so that movement of one tube relative to the other tube causes the inversion point to move relative to the medical device when loaded on the apparatus so as to expose the medical device to expansion when it is desired that the medical device expand at a target site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for delivering a medical device to a site within a patient, the apparatus comprising:
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a catheter comprising; distal and proximal ends; inner and outer tubes, movable with respect to each other with the inner tube being located at least partially inside the outer tube; a region for receiving the medical device on an outer surface of the inner tube; and a flexible sheath for retaining the medical device, when positioned in the region, the sheath being folded over upon itself to have outer and inner portions, the outer portion being attached directly or indirectly to an outside distal end of the outer tube and the inner portion being attached directly or indirectly to a collar attached to the inner tube so that movement of one tube relative to the other tube causes movement of the outer portion of the sheath from a position at least partially covering the region to a position at least partially exposing the region; wherein the outer portion is adjacent to the inner portion such that no portion of the outer tube is between any portion of the inner portion and any portion of the outer portion that partially covers the region and such that the inner portion contacts the outer portion. - View Dependent Claims (10, 12, 13, 14, 15, 16)
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11. The apparatus of dam 9, wherein the inner tube is movable in the proximal direction to cause the movement of the outer portion of the sheath to at least partially expose the region.
Specification