Multi-lumen extrusion tubing
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorsJessica Chiu, Paul Reiss, Mark Newton, Eric D. Peterson
Life of this patent
Estimating the term…
Abstract
A multi-lumen balloon for use in a fluted balloon centering catheter and method for providing the same. The multi-lumen balloon maintains a radiation source at the center of a cardiovascular artery, has improved blood perfusion capability, and has improved balloon refolding characteristics. The method of fabricating a multi-lumen balloon designed for a radiation centering catheter uses an improved extrusion process that allows the manufacture of the multi-lumen balloon sub-assembly to be done separately from the catheter shaft assembly.
Claims17
A method for making multi-lumen tubing, the method comprising:
- pushing a molten resin material through a tip and die assembly such that a plurality of resin material shafts are formed, the tip and die assembly including an extrusion die and a plurality of mandrels, wherein the extrusion die has at least one outer exit hole disposed adjacent to a central exit hole;
- applying a pressurized medium to the plurality of resin material shafts so as to maintain a lumen running lengthwise along the plurality of resin material shafts;
- and
- pulling the plurality of resin material shafts away from the extrusion die so as to cause the plurality of resin material shafts to fuse together lengthwise into the multi-lumen extrusion tubing having a central lumen and at least one outer lumen disposed adjacent to the central lumen.
Dependencies are inferred from the claim text.