Importance

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Abstract

Disclosed is a heated balloon catheter in use for effectively heating of the constricted zone of blood vessels deep thereinto, performing a proper temperature measurement, having further advantage of easy fabrication thereof. A 2 to 20 MHz radio frequency generator is connnected to heating electrode within a balloon and opposite electrode external of a patient respectively. A thermocouple mounted within the balloon is connected to an external temperature controller across paired conductors. A passive filter and an active filter are provided to eliminate said R.F. noise from said conductors. From R.F. generator is supplied R.F. energy to allow the capacitive current to flow through the patient's body via the electrodes, whereby a stenosis can be heated deep thereinto by capacitive heating. From the thermocouple is output the D.C. thermoelectric potential corresponding to the temperature to the temperature controller, of which the siganals are purified by said filters. Further disclosed are catheters including two conductor wires, together with one wire and no wire structrues respectively.

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First Claim