Balloon catheter with shape memory sheath for delivery of therapeutic agent
AssigneeBoston Scientific Scimed, Inc.
InventorTorsten SCHEUERMANN
Life of this patent
Estimating the term…
Abstract
A medical device is provided comprising a catheter, a balloon mounted on the catheter, and a sheath comprising a shape memory material, the sheath being located around the balloon. The sheath has a protective condition in which the sheath forms a plurality of pockets in a generally closed position and an activated condition in which the pockets are in a generally open position. A therapeutic agent is located within the generally closed pockets of the sheath when the sheath is in the protective condition. The therapeutic agent is exposed for delivery to a target site when the sheath is transitioned from the protective condition to the activated condition.
Claims20
A medical device comprising:
- a catheter;
- a balloon mounted on the catheter;
- a sheath comprising a shape memory material, the sheath being located around the balloon;
- and
- a therapeutic agent;
- wherein the sheath has a protective condition in which the sheath forms a plurality of pockets in a generally closed position and an activated condition in which the pockets are in a generally open position;
- wherein the therapeutic agent is located within the generally closed pockets of the sheath when the sheath is in the protective condition;
- and
- wherein the therapeutic agent is exposed for delivery to a target site when the sheath is transitioned from the protective condition to the activated condition.
A method of delivering therapeutic agent to a target site, the method comprising:
- providing a medical device comprising:
- a catheter;
- a balloon mounted on the catheter;
- a sheath comprising a shape memory material, the sheath being located around the balloon;
- and
- a therapeutic agent;
- wherein the sheath has a protective condition in which the sheath forms a plurality of pockets in a generally closed position and an activated condition in which the pockets are in a generally open position;
- delivering the balloon to the target site, with the balloon in an unexpanded condition and the sheath in the protective condition, wherein the therapeutic agent is located within the generally closed pockets of the sheath when the sheath is in the protective condition;
- inflating the balloon from its unexpanded condition to an expanded condition;
- and
- transitioning the sheath from its protective condition to its activated condition, thereby exposing the therapeutic agent for delivery to the target site.
A method of delivering therapeutic agent to a target site, the method comprising:
- providing a medical device comprising:
- a catheter;
- a balloon mounted on the catheter;
- a sheath comprising a shape memory material, the sheath being located around the balloon;
- and
- a therapeutic agent;
- wherein the sheath has a protective condition in which the sheath forms a plurality of pockets in a generally closed position and an activated condition in which the pockets are in a generally open position;
- delivering the balloon to the target site, with the balloon in an unexpanded condition and the sheath in the protective condition, wherein the therapeutic agent is located within the generally closed pockets of the sheath when the sheath is in the protective condition;
- inflating the balloon from its unexpanded condition to an expanded condition;
- transitioning the sheath from its protective condition to its activated condition, thereby exposing the therapeutic agent for delivery to the target site;
- and
- rotating the balloon with respect to the target site.
Dependencies are inferred from the claim text.