| 摘要 |
<p>An apparatus for cryosurgery is described, comprising an exhaust line 111 configured to receive cryogen from a probe 105 and a vacuum source 107 configured to be in fluid communication with the exhaust line 111. The apparatus may further comprise a heating means to heat the cryogen prior to its delivery to the probe 105. The probe 105 may comprise a dispersive medium, such as a porous or sintered material. A vacuum reservoir 125 may also be provided, optionally in communication with a heat exchanger, heating element or other heating means. The exhaust line 111 may also have peripheral insulation such as a vacuum jacket. The exhaust line 111 may be provided concentrically about a cryogen supply line 109 and may be continuously evacuable. Also disclosed is a probe with a dispersive medium, a method and means of drawing cryogen using a vacuum source, a liquid cryogen exhaust apparatus, a cryogen line comprising a concentric insulating conduit and a cryosurgery apparatus comprising primary and secondary sources of liquid cryogen.</p> |
