| 摘要 |
PCT No. PCT/GB97/02177 Sec. 371 Date Feb. 12, 1999 Sec. 102(e) Date Feb. 12, 1999 PCT Filed Aug. 12, 1997 PCT Pub. No. WO98/06339 PCT Pub. Date Feb. 19, 1998The invention relates to a medical cryo-surgical device. Hitherto, such devices have employed the Joule-Thompson cooling effect, liquid nitrogen, or a sprayed volatile liquid. All such devices will serve the required purpose of cooling tissue to the level that will cause ice crystal formation, but all are relatively inefficient. The invention seeks to provide an improved device, an objective met by a construction comprising a primary heat extraction means (1), a secondary heat extraction means (12) associated with a part to be applied to a patient, and a coolant circuit (14) connecting the primary and secondary heat extraction means. The heat extraction means may be thermo-electric devices that can be sequentially or concurrently activated. |
