Splittable catheter composite material and process

Details Splittable catheter composite material and process Splittable catheter composite material and process

1987-02-06

1988-10-11

Yasko, John D.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604280, A61M 518

Patent

active

047768460

ABSTRACT:
Disclosed is an apparatus and method for preparing a catheter tube which has a longitudinal line of weakness extending axially there along as a place of preferential splitting. The method includes co-extruding two materials into the tubular cross-sectional shape, one of the materials forms a surface line along the other which extends radially to a level wherein the thickness of the tubing cross-section there at is less. When the co-extruded extra material is moved a groove is in the surface of the tube which groove permits easy tearing there along. The product formed by this method is also disclosed and includes the co-extruded polymers configured into a hollow tube of uniform radial cross-section and thickness before the co-extruded portion is removed.

REFERENCES:
patent: 3677243 (1972-07-01), Nerz
patent: 3853130 (1974-12-01), Sheridan
patent: 4054136 (1977-10-01), von Zeppelin
patent: 4402685 (1983-09-01), Buhler et al.
patent: 4412832 (1983-11-01), Kling et al.
patent: 4451256 (1984-05-01), Weikl et al.
patent: 4471778 (1984-09-01), Toye
1984 Annual Book of American Society for Testing and Materials Section 9, vol. 09.01, pp. 155-157 "Standard Test Method for Rubber Property-Tear Resistance".

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