| 摘要 |
A self-contained, mobile, compact, untethered cryosurgical instrument is provided in which liquefied gas coolant in a container with heat conducting walls is pressurized by ambient temperature for delivery to a lesion to be necrotized. The coolant is discharged in a controlled spray in one embodiment; the delivery tube includes a vent tube coaxially spaced therefrom in other embodiments. Freezing to tissue is overcome with "Teflon" coatings.
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