Experimental study on a cryosurgery apparatus

• Published in: Journal of Zhejiang University. A. Science Vol. 11; no. 2; pp. 128 - 131
• Main Authors: Zhang, Shao-zhi, Wu, Dong-bo, Yang, Ge, Chen, Guang-ming
• Format: Journal Article
• Language: English
• Published: Heidelberg SP Zhejiang University Press 01.02.2010
• Subjects: Civil Engineering; Classical and Continuum Physics; Engineering; Industrial Chemistry/Chemical Engineering; Mechanical Engineering; 冷冻治疗; 冷冻设备; 制冷系统; 制冷能力; 多种系统; 最低气温; 混合制冷剂; Cryoprobe; Cryosurgery; Refrigerant mixture; TB69; Auto-cascade refrigeration system
• ISSN: 1673-565X; 1862-1775
• DOI: 10.1631/jzus.A0900071

Cryosurgery is an effective way of curing many diseases including tumors and cancers. It can be applied using a variety of systems and cryogens. Cheap, convenient, reliable equipment still needs to be developed so that cryotherapy may be accepted by surgeons and hospitals. This paper presents a cryosurgery apparatus that utilizes an auto-cascade refrigeration system. Refrigerant mixture R50/R23/R600a was selected as the working fluid. The mixture composition was altered to achieve lower temperatures and higher capacity. The lowest temperature at the cryoprobe could be as low as -100℃, and 8 W refrigeration capacity could be obtained at -80 ℃. An ice ball of 11.6 mm diameter could be formed when the cryoprobe was immersed in a water bath at 37 ℃.