| 摘要 |
The cryosurgical instruments disclosed have a sheath of porous material spaced from a heat conducting core, and an anti-cryoadhesion material which is cooled to cryogenic temperatures and thus also acts as a cryogenic fluid is pumped through the space between the sheath and the core. A part of the material is exuded through the sheath to prevent sticking of the material of the sheath to the tissue with which the instrument is in contact, and the remainder of the material is recirculated. The porous sheath can be removably attached to the instrument so that a sheath in the shape of a probe or surgical blade can be used on the instrument.
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