Indwelling luminal devices
The invention comprises an indwelling medical device which is capable of delivering a therapeutic agent evenly along the length of the indwelling portion, including the outer wall, of the device.
1. A medical device comprising:
a central tube comprising at least one lumen; and
a secondary tube surrounding the central tube such that the central tube is insertable into and removable from the secondary tube, the secondary tube having a distal end which, upon removal of the central tube, collapses and forms a seal upon itself which is configured to prevent flow of fluid into the secondary tube in an absence of the central tube.
2. The medical device of claim 1 , wherein the secondary tube comprises an inflatable sleeve which extends from a distal end of the central tube to a proximal end of the central tube.
3. The medical device of claim 1 , wherein the secondary tube comprises an expanded configuration when the medical device is in operation and a collapsed configuration forming the seal when the medical device is not in operation.
4. The medical device of claim 3 , wherein the secondary tube is expandable into the expanded configuration when the central tube is inserted in the secondary tube.
5. The medical device of claim 1 , wherein the secondary tube comprises flexible biocompatible polymeric material.
6. The medical device of claim 3 , the distal end of the secondary tube comprising a plurality of expandable bent sections which expand into a lantern shaped vessel anchor when the secondary tube is in the expanded configuration.
7. The medical device of claim 6 , wherein the plurality of expandable bent sections are substantially parallel to the central tube when the secondary tube is in the collapsed configuration.
8. The medical device of claim 1 , wherein the secondary tube comprises perforated material.
9. A method of delivering a therapeutic agent to a vasculature, comprising:
preparing a central tube comprising at least one lumen and a secondary tube surrounding the central tube into the vasculature, wherein the central tube is insertable into and removable from the secondary tube;
inserting the central tube into the secondary tube to expand the secondary tube into an expanded configuration;
delivering the therapeutic agent to the vasculature from the at least one lumen of the central tube; and
removing the central tube from the secondary tube to collapse the secondary tube into a collapsed configuration, causing a distal end of the secondary tube to collapse and form a seal upon itself which is configured to prevent flow of fluid into the secondary tube from the vasculature in an absence of the central tube.
10. The method of claim 9 , further comprising:
expanding a plurality of expandable bent sections of the secondary tube into a lantern shaped vessel anchor when the secondary tube is in the expanded configuration.
11. The method of claim 10 , wherein the plurality of expandable bent sections are substantially parallel to the central tube when the secondary tube is in the collapsed configuration.
12. The method of claim 9 , wherein the secondary tube comprises flexible biocompatible polymeric material.
13. The method of claim 9 , wherein the secondary tube comprises perforated material.