Surgery – Instruments – Electrical application
Patent
1991-02-19
1991-10-15
Cohen, Lee S.
Surgery
Instruments
Electrical application
A61B 1739
Patent
active
050571079
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: 4532924 (1985-08-01), Auth et al.
patent: 4765331 (1988-08-01), Petruzzi et al.
Parins David J.
Rydell Mark A.
Stasz Peter
Cohen Lee S.
Everest Medical Corporation
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