Catheter balloon with improved retention
View Patent ↗A catheter for delivering a medical device into a body lumen, and method for preparing said catheter, wherein the catheter comprises an elongate body, at least a portion of which defines a medical device retaining region for retaining a medical device thereon. At least a portion of the medical device retaining region comprises a predetermined pattern of material. The predetermined pattern of material is a photoresist material that may be placed on the outer surface of the catheter to modify at least one physical property of the catheter.
1. A catheter for delivering a medical device into a body lumen, the catheter comprising:
an elongate body, at least a portion of the elongate body defining a medical device retaining region for retaining a medical device thereon, at least a portion of the medical device retaining region comprising a predetermined pattern of photoresist material, the photoresist material is a positive photo resist material comprising at least one member selected from the group consisting of diazoquinones, phenolic resins, phenolic formaldehyde resins, phenolic resins with about 1-5% bisaryl azide compounds, 3,3′-(p-phenyl-ene)bis(ethyl propionate), dialkoxy acetophenones;
benzoin ethers; benzophenones, Michler's ketones, ketocoumarins-phenoxyacetic acid pairs, multifunctional epoxides, diaryliodonium salts, triarylsulfonium salts, bisazide-cyclized polyisoprene, poly(p-diethynylbenzene), polystyrene; polyvinylphenol; polyimide and combinations thereof.
2. The catheter of claim 1 wherein the predetermined pattern of photoresist material is constructed and arranged to retain the medical device to the medical device receiving region prior to delivery of the medical device.
3. The catheter of claim 1 wherein the medical device retaining region is an expandable balloon.
4. The catheter of claim 1 wherein the predetermined pattern of photoresist material defines at least one raised portion of the medical device receiving region.
5. The catheter of claim 4 wherein the at least one raised portion of the medical device receiving region extends outward from the elongate body.
6. The catheter of claim 5 wherein the medical device is a stent releasably engaged to the at least a portion of the medical device retaining region, the at least one raised portion releasably engaging the stent.
7. The catheter of claim 6 wherein the stent comprises an expandable framework having a plurality of openings therethrough, the at least one raised portion at least partially extending through at least one of the openings in the stent framework to releasably engage the stent framework.
8. The catheter of claim 7 wherein the stent has a reduced state and is expandable to an expanded state, in the reduced state the stent being engaged to the at least one raised portion of the at least a portion of the medical device retaining region, the stent being released from the at least one raised portion when the stent is in the expanded state.
9. The catheter of claim 8 wherein the at least a portion of the medical device retaining region is an expandable balloon.
10. The catheter of claim 1 wherein the predetermined pattern of photoresist material defines at least one indented portion of the medical device receiving region.
11. The catheter of claim 1 wherein the elongate body is constructed from the same material as said predetermined pattern.
12. The catheter of claim 1 wherein the elongate body is constructed from a catheter material, the catheter material and the photoresist material being different materials.
13. The catheter of claim 1 wherein the photoresist material is a photo cross-linkable material.
14. The catheter of claim 1 wherein the photoresist material is a photo cross-linked material.
15. The catheter of claim 1 wherein the photoresist material is a multifunctional epoxide selected from at least one material of the group consisting of bisphenol A, diglycidyl ether, and vinyl cyclohexane, and any combination thereof.
16. The catheter of claim 11 wherein the predetermined pattern of photoresist material is deposited on the catheter material by at least one deposition process from the group consisting of ink jet printing, electrostatic spray, pressurized jet coating, contact printing and any combination thereof.
17. The catheter of claim 12 wherein the predetermined pattern of photoresist material is deposited on the catheter material by at least one deposition process from the group consisting of ink jet printing, electrostatic spray, pressurized jet coating, contact printing and any combination thereof.