A method, a device and an experimental model were developed to control the cooling and providing effective low temperatures during cryosurgical treatment of bone tumors. Using the developed device, a range of effective temperatures was determined under the action of liquid nitrogen on the model of the bone cavity. Two ways of cooling the residual bone cavity, instillation and contact, were compared. During the experiment it was proved that the contact method of cryoexposure on the residual bone cavity model is more effective than the instillation of liquid nitrogen according to the characteristics of the temperature field. The proposed experimental model of the residual bone cavity makes it possible to study the temperature field, determine the rate of freezing and thawing both with the contact method and with the instillation of liquid nitrogen into the bone cavity. The results obtained allow to develop preliminary recommendations on the technique of carrying out cryosurgical ablation of bone tumors.

Keywords: cryoprobe, experimental model, tumors of bones, cryosurgery