Dilation catheter with a smooth transition between a stiff proxi

Details Dilation catheter with a smooth transition between a stiff proxi Dilation catheter with a smooth transition between a stiff proxi

1994-05-27

1996-01-02

Yasko, John D.

Surgery

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

Treating material introduced into or removed from body...

604281, 128772, 606194, A61M 2500

Patent

active

054803837

ABSTRACT:
A balloon dilatation having a catheter shaft with inner and outer tubular members with the proximal portion of the inner tubular member being formed of a pseudoelastic NiTi alloy having an A.sub.f at or below body temperature. The austenite phase is stable at body temperature exhibits a stress induced transformation, to the martensite phase which has a much lower modulus of elasticity than the austenite phase. The distal portion of the inner tubular member is formed of a flexible plastic material. The junction of the proximal and distal portions of the inner tubular member is preferably supported by a transition sleeve formed of a high strength plastic such as polyimide to provide a smoother transition between the proxima and distal portions of the inner tubular member and in turn the proximal and distal portion of the catheter shaft.

REFERENCES:
patent: 5047045 (1991-09-01), Arney et al.
patent: 5100381 (1992-03-01), Burns
patent: 5120308 (1992-06-01), Hess
patent: 5171222 (1992-12-01), Enteneuer et al.
patent: 5238004 (1993-08-01), Sahatjian et al.
patent: 5259839 (1993-11-01), Burns
patent: 5334168 (1994-08-01), Hemmer
patent: 5342299 (1994-08-01), Snoke et al.

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