| 摘要 |
The invention relates to a cryosurgical instrument and a method for separating a tissue sample from surrounding tissue of a biological tissue that is to be treated. The cryosurgical instrument comprises a probe for guiding a probe head on to a biological tissue to be treated, and gas conduits for delivering coolant gas, wherein the probe head is designed in such a way that, in order to collect a tissue sample, a limited region of the tissue can be cooled by means of the gas delivered and can be separated from the surrounding tissue in a state in which it is frozen on the probe head. The instrument is intended to permit reliable removal of a tissue sample without damaging the tissue and to ensure a high degree of safety for the patient. To this end, the instrument has a support means in which the probe is guided and which can be moved relative to the probe in such a way that the surrounding tissue can be counter-supported during separation of the tissue sample. The corresponding method carried out by means of the cryosurgical instrument involves separation of a tissue sample from surrounding tissue of a biological tissue to be treated.
|
