Surgery – Means for introducing or removing material from body for... – With means for cutting – scarifying – or vibrating tissue
Patent
1995-06-06
1996-12-10
Mendez, Manuel
Surgery
Means for introducing or removing material from body for...
With means for cutting, scarifying, or vibrating tissue
A61B 1739
Patent
active
055825893
ABSTRACT:
A medical probe device of this invention comprising a catheter having a control end and a probe end. The probe end includes a stylet guide housing having at least one stylet port and stylet guide means for directing a flexible stylet outward through at least one stylet port and through intervening tissue to targeted tissues. A stylet is positioned in at least one of said stylet guide means, the stylet comprising a non-conductive sleeve having a RF electrode lumen and an optional a fluid supply lumen and a temperature sensor lumen therein. At least one portion of an opposed surface of the electrode lumen and the electrode can be spaced apart to define a liquid supply passageway for delivery of medicament liquid. The RF electrode enclosed within the non-conductive sleeve has a distal length optionally having at least one current focusing groove means thereon and a distal tip shaped to focus current crowding on its terminal end, whereby Rf current passing therefrom into surrounding tissue forms a lesion extending outward from the groove and tip. The focusing groove means can be a plurality of annular focusing grooves or a spiral focusing groove thereon.
REFERENCES:
patent: 4950267 (1990-08-01), Ishihara et al.
patent: 5003991 (1991-04-01), Takayama et al.
U.S. Patent application Ser. No. 832,115--presently abandoned.
Baker, Jr. James A.
Edwards Stuart D.
Lax Ronald G.
Lundquist Ingemar H.
Sharkey Hugh R.
Mendez Manuel
Vidamed, Inc.
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