Bald W B
Cryobiology. 1984 Oct;21(5):570-3. doi: 10.1016/0011-2240(84)90056-7.
The design and testing of a prototype cryosurgical probe utilizing helium gas precooled with liquid nitrogen are described. An 8-mm-diameter probe produced an ice ball with a diameter of 28 mm after 10 min freezing using a helium gas flow rate of 42 liter/min. This indicated a surface heat transfer coefficient of 0.34 W/cm2 degrees K and temperature of -138 degrees C at the probe tip. Improved performance figures can be achieved using higher gas pressures and flow rates. A helium gas flow system schematic for use with this new type of cryoprobe is also presented. It is claimed that this system will overcome the problems of developing both multiple-tipped probes and small-diameter needle probes for use in cryoanalgesia.
本文描述了一种利用液氮预冷氦气的冷冻手术探针原型的设计与测试。一个直径8毫米的探针，在使用流速为42升/分钟的氦气冷冻10分钟后，产生了一个直径为28毫米的冰球。这表明表面传热系数为0.34瓦/平方厘米·开尔文，探针尖端温度为 -138摄氏度。使用更高的气体压力和流速可以实现更好的性能指标。本文还给出了与这种新型冷冻探针配套使用的氦气流系统示意图。据称，该系统将克服开发用于冷冻镇痛的多尖端探针和小直径针状探针所面临的问题。
