Abstract
This paper is aimed to study the prototype of cryosurgical device with an extended applicator. Three experiments were conducted. First, an experiment without heat load showed temperature distribution on extended applicator and its cooldown time. Second, an experiment with a typical heat load (when the applicator contacts the biotissue phantom) showed the impact of heat load on the surface temperature and on its cooldown time in this case, as well as the temperature at the control points inside the biotissue phantom and the dynamics of growth, shape and size of the freezing region. The third experiment was equivalent to the second, but without temperature sensors on the applicator surface for better freezing region visualization. Also, after the liquid nitrogen supply is stopped, the dynamics of thawing are considered. Data on the actual temperature during cryoexposure should help give basic recommendations for developing a cryoexposure technique with increased dosing accuracy.
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