Balloon catheter having micro needles and manufacturing method for the same
AssigneeIndustry-Academic Cooperation Foundation, Yonsei University
InventorsWon Hyoung Ryu, Kang Ju Lee
Life of this patent
Estimating the term…
Abstract
A balloon catheter which is inflated after insertion into a tubular tissue includes: a balloon catheter body made of a polymer material, which is inflatable by fluid injection; and a plurality of microneedles formed on the surface of the balloon catheter body, wherein the microneedles are formed by transferring a biocompatible polymer resin or photocurable resin, filled in intaglio patterns formed on a mold, which have a shape corresponding to a shape of the microneedles, to the surface of the balloon catheter body which is in close contact with the mold, by a thermal molding, thermal crosslinking or photocuring process.
Claims11
A method for manufacturing a balloon catheter, in which a plurality of microneedles are simultaneously formed on a surface of a balloon catheter body which is inflated after insertion into a tubular tissue, the method comprising:
- preparing a mold having formed thereon a plurality of intaglio patterns having a shape corresponding to a shape of the microneedles;
- filling the intaglio patterns with a biocompatible polymer resin or photocurable resin for forming the microneedles, in which the polymer resin or photocurable resin is transferable to the surface of the balloon catheter body, which is in close contact with the mold, by a thermal molding, thermal crosslinking or photocuring process;
- arranging the mold so as to surround the balloon catheter body along a circumferential direction of the balloon catheter body while being spaced apart from the balloon catheter body;
- injecting a fluid into the balloon catheter body to inflate the balloon catheter body to thereby bring an outside surface of the balloon catheter body into contact with the intaglio patterns of the mold;
- thermally molding or thermally crosslinking the polymer resin filled in the mold or curing the photocurable resin with light energy while maintaining the contact between the balloon catheter body and the mold;
- and
- removing the mold from the balloon catheter body, after the microneedles are simultaneously transferred from the inside of the intaglio patterns to the surface of the balloon catheter body through the thermal molding, thermal crosslinking or curing of the polymer.
Dependencies are inferred from the claim text.