Experimental Study of Possible use of Flexible Capillary Tubes in Cryomedicine

To cool damaged areas of biological tissue in order to achieve a rapid analgesic effect, the procedure of applying a thin film of a boiling gas mixture to the skin at a temperature of 𝑇଴ = 273 ÷ 238 𝐾 is widely used. This temperature is easily achieved using a cooling aerosol. Experimental data were obtained on the temperature distribution on the cooled surface during throttling from nozzles with a diameter of 0.1; 0.5; 1 mm propane-butane mixture per temperature level 𝑇଴ = 240; 248; 258; 263 𝐾 used for sports medicine. A study was made of flexible capillary tubes with an inner diameter of 120 μm, an outer diameter of 220 μm, and a wall thickness of 50 μm for use in local cryotherapy and cryosurgery.