| 摘要 |
An improved closed loop cryosurgical system and related methods of use. The closed loop cryosurgical system can utilize a reduced size cryoprobe by moving a pre-cool heat exchanger into a control console for the system. The cyroprobe can further include a sheath having at least one thermal wire spaced around the sheath that can be heated using the control console so as to thaw frozen tissue. By incorporating thermal wiring into the sheath, the time necessary for a cryosurgical procedure can be significantly reduced, especially where multiple freeze-thaw cycles are conducted. In another aspect, an improved, environmentally friendly mixed gas refrigerant can be provided for use in cooling the cyroprobes. The mixed gas refrigerant avoids the use of the refrigerant R22 while also providing faster and more efficient ice ball formation at the cryoprobe tip, therefore allowing the cryosurgical treatment to be accomplished in less time.
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