Easily fabricated rotary-drive acoustic ablation catheter

Details Easily fabricated rotary-drive acoustic ablation catheter Easily fabricated rotary-drive acoustic ablation catheter

1997-03-31

1998-09-22

Buiz, Michael Powell

Surgery

Instruments

Cutting, puncturing or piercing

606171, A61B 1700

Patent

active

058108602

ABSTRACT:
An acoustic ablation catheter driven by a rotating shaft (18) includes a rotary-to-axial-motion converter (210), which includes a rotary driver (220, 420) in the form of a shell (222, 422) defining an inner surface (228, 428) which features a depressed groove (230, 330, 430). A follower (250, 490, 724) includes protuberance(s) (254, 494) which extend radially outward to engage the groove. This arrangement provides higher frequency response than some prior-art arrangements, and has the advantage of lesser diameter. In a particular embodiment, the shell (422) is made up of a cylinder (422) with a smooth interior, together with two end pieces (470, 480) which have axially-directed bumps or teeth (472, 482) which together define the guide path (330, 430). In a particular embodiment of the invention, the body (12) of the catheter (10) is made from a braided tube impregnated with a cured liquid, such as polymer. The body of the catheter is made by braiding threads to form a tube, expanding the tube to fit over a mandrel having the shape of the body of the catheter, impregnating the braided tube with uncured liquid polymer, vacuum bagging the impregnated tube and the mandrel, and curing the impregnant.

REFERENCES:
patent: 5423797 (1995-06-01), Adrian et al.
patent: 5593415 (1997-01-01), Adrian

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