| 摘要 |
A method and apparatus for measuring the temperature of malignant tissue to be frozen during cryosurgery, involving the insertion of an active needle electrode (18) laterally of and below the malignant tumor (T or T') to be treated, applying an indifferent electrode (20) to the patient's skin (S) at a point displaced from the tumor, applying a low voltage D.C. potential (12) across the electrodes to pass a current of less than 20 microamperes through the tissue, and monitoring (16) the current decrease during freezing to determine the point at which to terminate the freeze treatment with cryocongelation of all the malignant tissue but without substantial destruction of the underlying tissue.
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