Catheter tube having a filamentous reinforcing layer

Details Catheter tube having a filamentous reinforcing layer Catheter tube having a filamentous reinforcing layer

1993-10-22

1996-07-23

McDermott, Corrine M.

Surgery

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

Treating material introduced into or removed from body...

604280, 138124, A61M 2500

Patent

active

055385133

ABSTRACT:
A catheter tube is composed of a main portion and a tip portion. The main portion of the catheter tube is of such a structure that an inner tube and an outer tube are joined via a reinforcing material layer, but the tip portion is of such a structure that only the inner tube and the outer tube are joined without intervening the reinforcing material layer between the two tubes. The reinforcing material layer is formed by arranging a filamentous element (e.g., stainless steel wire) around the inner tube in a lattice manner. The inclination angles .theta.1, .theta.2 and .theta.3 of the filamentous element with respect to the axis of the catheter tube at the first, second and third regions, respectively are determined so as to establish the relationship as .theta.1<.theta.2<.theta.3. Therefore, the rigidity of the catheter can be increased in accordance with the decrease of the inclination angle of the filamentous element. According to the catheter tube, excellent pushing, torque transmission, follow-up to a guide wire, and kink-resistant characteristics can be attained, simultaneously and respectively.

REFERENCES:
patent: 4516972 (1985-05-01), Samson
patent: 4636346 (1987-01-01), Gold et al.
patent: 4898591 (1990-02-01), Jang et al.
patent: 5037404 (1991-08-01), Gold et al.
patent: 5041100 (1991-08-01), Rowland et al.
patent: 5057092 (1991-10-01), Webster, Jr.
patent: 5312356 (1994-05-01), Engelson et al.

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