Releasable coatings on balloon catheters
First Claim
Patent Images
1. In a balloon angioplasty catheter of the type comprising a catheter body and a balloon positioned along the length of the catheter body, said balloon including means for remotely inflating and deflating said balloon;
- the improvement comprising;
(a) a plurality of microcapsules on the exterior of said balloon, each of said microcapsules carrying a drug or combination of drugs for treatment or diagnostics within a body lumen when said catheter is positioned and inflated therewithin such that the drug or drugs may be released from said microcapsules.
2 Assignments
0 Petitions
Accused Products
Abstract
Balloon catheters are prepared to include a coating of body affecting chemicals on the exterior of the balloon. The coating releases from the balloon when the balloon is inflated into contact with the lumen to be treated. The device provides accurate placement of the dosage required at the location in need of treatment. The coating preferably includes drugs in microcapsules or microspheres. The catheters are especially useful in balloon angioplasty procedures.
841 Citations
21 Claims
-
1. In a balloon angioplasty catheter of the type comprising a catheter body and a balloon positioned along the length of the catheter body, said balloon including means for remotely inflating and deflating said balloon;
- the improvement comprising;
(a) a plurality of microcapsules on the exterior of said balloon, each of said microcapsules carrying a drug or combination of drugs for treatment or diagnostics within a body lumen when said catheter is positioned and inflated therewithin such that the drug or drugs may be released from said microcapsules. - View Dependent Claims (2, 3)
- the improvement comprising;
-
4. In a dilatation catheter of the type comprising a catheter body and a dilatation balloon positioned along the length of the catheter body;
- the improvement comprising;
(a) a plurality of microcapsules on the exterior of said balloon, each of said microcapsules carrying a drug which may affect the interior of a lumen when said catheter is positioned and inflated therewithin such that said microcapsules rupture to release their contents. - View Dependent Claims (5, 6, 7, 8, 9)
- the improvement comprising;
-
10. In a dilatation catheter of the type comprising a catheter body and a dilatation balloon positioned along the length of the catheter body;
- the improvement comprising;
(a) a plurality of microcapsules on the exterior of said balloon, each of said microcapsules carrying a drug which may affect the interior of a lumen when said catheter is positioned and inflated therewithin such that said microcapsules will release from said balloon upon inflation of said balloon. - View Dependent Claims (11)
- the improvement comprising;
-
12. A method for limiting acute or chronic lumen closure in an animal lumen comprising the steps of:
-
(a) inserting a dilatation catheter having a plurality of drug-containing microcapsules on the exterior of the catheter balloon into a lumen at the point where treatment is desired; (b) expanding said balloon against the walls of the lumen to break open and release the contents of the microcapsules against the lumen wall; and (c) removing said dilatation catheter.
-
-
13. A method for forming a balloon angioplasty catheter capable of supplying drug or drugs to a body lumen, said method comprising the steps of:
-
(a) obtaining a catheter having a balloon;
such that said drug is released onto a lumen during a balloon angioplasty procedure and(b) applying a plurality of drug-containing microcapsules to the exterior of said balloon. - View Dependent Claims (14, 15, 16)
-
-
17. A method for treating the interior of a body lumen comprising the steps of:
-
(a) inserting a balloon catheter having a balloon having an external coating of drug containing microcapsules into a lumen to be treated and positioning said balloon of said catheter next to the lumen wall needing treatment; (b) expanding said balloon against the lumen wall to cause said microcapsules to rupture and release their contents; and (c) removing said balloon catheter.
-
-
18. In a balloon angioplasty catheter of the type comprising a catheter body and a dilation balloon positioned along the length of the catheter body;
- the improvement comprising;
(a) a releasable drug-carrying coating consisting of microcapsules in the exterior of said balloon, said drug of the type which may affect the interior of a lumen when said catheter is positioned and inflated therewithin in a balloon angioplasty procedure such that said coating is released from the balloon onto the lumen. - View Dependent Claims (19, 20, 21)
- the improvement comprising;
Specification