| 摘要 |
A radiofrequency thermal balloon catheter uniformly heats tissues in contact with the balloon to achieve thermotherapy such as ablation or hyperthermia safely and properly for a diseased part. The radiofrequency thermal balloon catheter includes a catheter ( 4 ) having an outer shaft ( 2 ) and an inner shaft 3 extended through the outer shaft so as to be slidable relative to the outer shaft, an inflatable balloon ( 6 ) capable of being inflated so as to be in contact with a target lesion ( 18 ) and provided between respective front end parts of the outer and the inner shaft, and a radiofrequency electrode ( 8 ) extended in a wall of the balloon or inside the balloon to be used for radiofrequency energy supply in combination with a counter electrode ( 53 ). The counter electrode is disposed at a predetermined position, for example, inside the balloon, in the wall of the balloon, in a position neighboring the balloon or on the patient's body surface. A lead wire ( 10 ) electrically connects to the radiofrequency electrode. A temperature sensor ( 12 ) is capable of sensing temperature of a liquid contained in the balloon. A temperature distribution uniformizing device ( 14 ) uniformizes the temperature distribution in the liquid contained in the balloon.
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