| 摘要 |
<p>According to an aspect of the present disclosure, a cryogen delivery device comprising a can containing a cryogen preferably tetrafluoroethane is having a control valve connected to an out let pipe via a supply pipe to deliver the cryogen to the site. In one embodiment of the present disclosure, the supply pipe contains a control valve for controlling/regulating the cryogen delivery. In another aspect of the present disclosure the cryogen can is connected to the control valve by a connected pipe. In another embodiment of the present disclosure the outlet pipe is insulated using a foam based protecting insulator. According to another aspect of the present disclosure, another cryogen delivery device comprising a can containing a cryogen preferably tetrafluoroethane is connected to an outlet nozzle. In another embodiment of the present disclosure, the outlet nozzle of the device is held close to the surface of the tissue. In another embodiment of the present disclosure, the cryogen from the can is dispensed by pressing the spray head held facing downwards so that most of the spray is delivered in liquid form.</p> |
