Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1997-07-17
2000-11-28
Kennedy, Sharon
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 20, 604106, 606 27, 606 32, A61F 712
Patent
active
061528994
ABSTRACT:
A catheter having expandable electrodes for applying energy to a hollow anatomical structure such as a vein. When used on a vein, the catheter is useful for a minimally invasive treatment of venous insufficiency. The catheter includes conductive end rings to which the electrodes are attached, for mechanically connecting and electrically tying electrodes together to provide for a single wire electrical connection points, for transmitting energy while more evenly spacing the electrodes. Expandable arms are formed of electrically conductive material and insulated along their length except for an intermediate section that functions as the electrode. The arms are tapered to allow more room for wiring and to reduce the possibility of shorting between the ends of the arms. The catheter further includes thermocouples in the electrodes for measuring temperatures on the outer surface of the electrode. Slots are formed in the arms for mounting the thermocouples. The temperature at the hollow anatomical structure is monitored and if a rapid, large temperature decrease of short duration is noted, the power is maintained constant as a fluid flush has been detected.
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Don Crockett, Jr., M.D., et al., Preliminary Experience with an Endovascular Catheter for Electrocoagulation of Peripheral Veins, The Journal of Vascular Technology, Winter 1996, at 19-22.
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Daulton Jay S.
Farley Brian E.
Henderson Dawn A.
Miller Gary H.
Parker Mark P.
Kennedy Sharon
Rodriguez Cris L.
VNUS Medical Technologies, Inc.
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