Plasma modification of lumen surface of tubing

Details Plasma modification of lumen surface of tubing Plasma modification of lumen surface of tubing

1994-09-27

2000-02-08

Dye, Rena

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 3691, 428131, 428134, 428336, 623 12, 604 96, 427 212, 427256, 427489, 427490, A61M 2902, B32B 310

Patent

active

060226021

ABSTRACT:
The lumen surface of tubing is modified by exposure to a gas plasma in a vacuum apparatus. A method and apparatus are disclosed whereby plasma treatment of the lumen surface, such as by deposition of a plasma polymerizate, may be achieved inside a continuous length of tubing. A gas such as a monomer vapor is caused to enter the lumen of the tubing through openings sequentially arranged at a periodic interval along the length of the tubing, and is excited to a plasma state concurrently as the tubing passes through a tubular reaction conduit having an inner diameter in occlusive contact with the tubing's outer diameter. Essentially crack-free plasma polymerizate coatings with thicknesses greater than 1000 angstroms are selectively deposited on the lumen wall of the continuous tubing. Plasma-modified tubing is prepared having usefulness in medical devices such as catheters, vascular grafts and enteral feeding tubes.

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