Patent ID: 11154417

Abstract:
This application relates to a hand-held cooling device for supplying a cryogen to a target region for cryotherapy. The device can include a cryogen transfer unit configured to receive a first cryogen from an external cryogen reservoir, the first cryogen including i) a first amount of a liquid phase cryogen and ii) at least one of a first solid phase cryogen and a first gas phase cryogen. The device can also include a nozzle configured to spray a first modified cryogen to the target region. The device can further include a cryogen liquefier disposed between the cryogen container and the nozzle and configured to cool the first cryogen received from the cryogen transfer unit and output the first modified cryogen to the nozzle, the first modified cryogen including at least a second amount of the liquid phase cryogen more than the first amount of the liquid phase cryogen.