Ablation catheter with selectively deployable electrodes

Details Ablation catheter with selectively deployable electrodes Ablation catheter with selectively deployable electrodes

1989-04-13

1990-12-11

Cohen, Lee S.

Surgery

Instruments

Electrical application

A61B 1739

Patent

active

049767119

ABSTRACT:
A RF ablation catheter for removing athero-stenotic lesions or modifying the tissue characteristics of the interior walls of selected blood vessels is described. The catheter is characterized in having a tip member which during the initial placement of the catheter within the vascular system so that the distal tip member is disposed in a working relation with the lesion to be removed, means are provided for increasing the cross-sectional profile of the tip members to thereby cause it to move into engagement with the lesion to be excised. The application of an RF voltage across a pair of bipolar electrodes is used to create an electric arc for effecting the cutting action, or alternatively, just sufficient RF energy to sear or otherwise alter the tissue surfaces engaged by the distal tip member.

REFERENCES:
patent: 164184 (1875-06-01), Kidder
patent: 4519403 (1985-05-01), Dickhudt
patent: 4627436 (1986-12-01), Leckrone
patent: 4641649 (1987-02-01), Walinsky
patent: 4682596 (1987-07-01), Bales et al.
patent: 4776349 (1988-10-01), Nashef et al.

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