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Engineering limitations in designing a slender, liquid nitrogen cryoprobe.

Author(s) : CHANG Z. H., MA H. W., GELMAN I. A., BAUST J. G.

Summary

With the conventional liquid nitrogen cryosurgical device, the overall probe diameter can not be made smaller than 3.4 mm without compromising the desired freezing characteristics. Subcooled, highly pressurized liquid nitrogen in combination with a gas-venting mechanism makes it possible to reduce the overall diameter of the cryoprobe to as little as 3.0 mm, with a length as great as 400 mm, and still retain a reasonably high refrigerating capacity, even when connected to a liquid nitrogen transfer hose of approximately 2 m. Other data are given on length of freeze zone, thermal insulation, temperature measurements, etc.

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Pages: 554-561

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Details

  • Original title: Engineering limitations in designing a slender, liquid nitrogen cryoprobe.
  • Record ID : 1996-1894
  • Languages: English
  • Source: For a Better Quality of Life. 19th International Congress of Refrigeration.
  • Publication date: 1995/08/20
  • Document available for consultation in the library of the IIR headquarters only.

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