| 摘要 |
<p>A cryoprobe (2) is described having a Joule-Thomson nozzle (34) and heat exchanger (30) contained within a first sheath (20) in which the first sheath has an insulating layer (44) disposed proximally with respect to the heat exchanger, wherein the insulating layer affects the shape of the ice formed on the cryoprobe. In an alternate embodiment, a cryoprobe is described having an outer sheath (56) surrounding a first sheath whereby gas leaks from the first sheath are prevented from harming the patient.</p> |
