Evertable sheath devices, systems, and methods
AssigneeW. L. Gore & Associates, Inc.
InventorsEdward H. Cully, Craig W. Irwin, James D. Silverman
Life of this patent
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Abstract
The present disclosure comprises devices, systems, and methods having an inverted sheath configured to cover, and in some instances constrain, a medical device and to retract through eversion, thus enabling the deployment of medical device at the treatment site. A constraining sheath can evert hydraulically. A constraining sheath can be configured to neck down a medical device to achieve a lower delivery profile. Furthermore, a constraining sheath can comprise a balloon to expand or positionally or structurally adjust a medical device.
Claims15
A method of delivering a medical device comprising:
- positioning a radially compressed medical device within a vessel, the medical device being covered by a sheath having a delivery profile wherein the sheath is inverted to define an inner layer and an outer layer, wherein a pressurizable chamber is defined between the inner and outer layers, and the sheath defines a maximum outer diameter;
- and
- pressuring the pressurizable chamber to cause the sheath to transition from the delivery profile to a deployment profile wherein the sheath everts such that the sheath expands in diameter relative to the maximum outer diameter in the delivery profile and shortens in length relative to the delivery profile.
A method of delivering a medical device comprising:
- positioning a radially compressed medical device within a vessel, the medical device being covered by a sheath having a delivery profile wherein the sheath is inverted to define an inner layer and an outer layer, the sheath being a helically wrapped or braided tubular member with an angle of wrap or braid relative to a longitudinal axis of the sheath, wherein a pressurizable chamber is defined between the inner and outer layers;
- and
- pressuring the pressurizable chamber to cause the sheath to transition from the delivery profile to a deployment profile wherein the sheath everts such that the sheath expands in diameter and shortens in length relative to the delivery profile, the angle of the sheath changing in response to an increase in the diameter of the sheath.
Dependencies are inferred from the claim text.