Delivery system for deployment of medical devices
First Claim
1. An apparatus for minimally invasively delivering a medical device to a target site within a patient, the apparatus comprising:
- a first tube having an outside surface suitable for accepting the medical device collapsed thereon in a stationary position; and
a sheath including first and second portions that may be moved axially relative to each other and with respect to the first tube, the sheath portions configured so as to enclose the medical device collapsed onto the first tube when brought together, and configured to expose the medical device when directed away from each other, the first sheath portion including a proximal edge,wherein the proximal edge is elastically expandable from a first diameter to a second diameter, andwherein the proximal edge is biased radially inwardly to the first diameter when unconstrained such that the first sheath portion tapers proximally toward the first tube to reduce a profile thereof, andwherein the proximal edge is held at the second diameter by the medical device collapsed onto the first tube.
5 Assignments
0 Petitions
Accused Products
Abstract
A sheathed catheter system is described where the sheath comprises a distal portion and a proximal portion that are moveable axially relative to each other, and relative to a tube carrying a medical device thereon. The distal and proximal sheath portions can be brought together in order to enclose therewithin the medical device. The distal sheath has a proximal section that is configured to bias radially inwardly to minimize an otherwise exposed annular surface catching on protruding surfaces that may exist on the catheter or other medical tool in use at the time, or to minimize scraping the inner native lumen of the patient upon retrieval.
630 Citations
11 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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a first tube having an outside surface suitable for accepting the medical device collapsed thereon in a stationary position; and a sheath including first and second portions that may be moved axially relative to each other and with respect to the first tube, the sheath portions configured so as to enclose the medical device collapsed onto the first tube when brought together, and configured to expose the medical device when directed away from each other, the first sheath portion including a proximal edge, wherein the proximal edge is elastically expandable from a first diameter to a second diameter, and wherein the proximal edge is biased radially inwardly to the first diameter when unconstrained such that the first sheath portion tapers proximally toward the first tube to reduce a profile thereof, and wherein the proximal edge is held at the second diameter by the medical device collapsed onto the first tube. - View Dependent Claims (2, 3, 4)
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5. An apparatus for minimally invasively delivering a medical device to a target site within a patient, the apparatus comprising:
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a first tube having an outside surface suitable for accepting the medical device collapsed thereon in a stationary position, the first tube including a hub for retaining at least a portion of the medical device on the first tube, wherein the hub includes a generally extended non-tapered portion, and wherein the hub includes at least one button configured to retain the medical device on the hub until full deployment of the medical device; and a sheath including first and second portions that may be moved axially relative to each other and with respect to the first tube, the sheath portions configured so as to enclose the medical device collapsed onto the first tube when brought together, and configured to expose the medical device when directed away from each other, wherein the first sheath portion includes an elastically expandable proximal edge that is biased radially inwardly against the medical device collapsed onto the first tube when the sheath portions enclose the medical device, and wherein, during operation, when the first sheath portion is moved in a direction sufficient to expose the medical device the elastically expandable proximal edge is biased radially inwardly against the extended non-tapered portion of the hub and tapers proximally toward the first tube to maintain a low profile.
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6. An apparatus for delivering a medical device to a target site within a patient via a body lumen, the apparatus comprising:
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an inner tube; a distal sheath portion attached to the inner tube; an intermediate tube, moveable over the inner tube and at least partially into the distal sheath portion; an outer tube, moveable over the intermediate tube; a proximal sheath portion attached to the outer tube, so that, in use, the proximal sheath portion and the distal sheath portion can be moved together to substantially cover the medical device mounted on the intermediate tube and moved apart to deploy the medical device; the distal sheath portion having an elastic proximal edge biased radially inwardly to a first diameter when unconstrained such that the distal sheath portion tapers proximally toward the inner tube to reduce a profile thereof and the distal sheath portion being configured to expand from the first diameter to a second diameter to cover the medical device. - View Dependent Claims (7, 8, 9)
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10. An apparatus for delivering a medical device to a target site within a patient via a body lumen, the apparatus comprising:
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an inner tube; a distal sheath portion attached to the inner tube, wherein the distal sheath portion includes an elastic proximal edge biased radially inwardly to a first diameter when unconstrained such that the distal sheath portion tapers proximally toward the inner tube to reduce a profile thereof and the elastic proximal edge being expandable from the first diameter to a second diameter to cover the medical device; an intermediate tube, moveable over the inner tube and at least partially into the distal sheath portion, the intermediate tube having a hub at its distal end and having a region on the intermediate tube proximal of the hub for mounting the medical device, wherein the region for mounting the medical device includes at least one button configured to retain the medical device on the hub until full deployment of the medical device; an outer tube, moveable over the intermediate tube; and a proximal sheath portion attached to the outer tube, so that, in use, the proximal sheath portion and the distal sheath portion can be moved together to substantially cover the medical device mounted on the intermediate tube and moved apart to deploy the medical device; the hub having an axial length sufficient to permit the medical device to be deployed while the distal sheath portion covers at least part of the hub. - View Dependent Claims (11)
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Specification