US Patent 11172975 Portable electro-mechanical cryosurgical device

The portable cryosurgical device is economical, easy to use and operate, and delivers cryogenic material such as nitrous oxide and carbon dioxide gas in any direction or orientation. The delivered materials destroy target tissue using extremely cold temperatures and the abrasives formed when the cryogenic material becomes a solid. The device includes a portable countertop enclosure housing a cryogen source, a cryogen flow tube in fluid communication with the cryogen source, and a flow path assembly. The flow path assembly includes a valve between the cryogen source and the cryogen flow tube having substantially zero dead volume. The flow path assembly can include a quick-connect cryogen tank adapter and an in-line cryogen filter. The flow path assembly delivers liquefied compressed gas from the cryogen source to a terminal end of the cryogen flow tube without a phase change occurring in the flow path.