Cryogenic device for surgical use

A cryogenic device for a surgical use making it possible to freeze an area of a human body at a temperature lower than −50° C., the cryogenic device comprising:

• an end piece including a metal tip configured to be brought into contact with the area to be frozen and a cryogenic gas release chamber;
• a flexible tube externally delimited by an outer wall, an end of which is inserted into the end piece, and containing:
• a discharge conduit directly communicating with the cryogenic gas release chamber for discharging a cryogenic gas directly from the cryogenic gas release chamber, and
• a supply conduit for supplying the gas release chamber with the cryogenic gas, the supply conduit being distinct from the discharge conduit so that the supply conduit communicates with the discharge conduit only through the gas release chamber, said supply conduit having a section smaller than a section of at least the end of the discharge conduit in communication with the cryogenic gas release chamber, so that said cryogenic gas is kept under pressure prior to being injected into said cryogenic gas release chamber, said supply conduit being internally delimited by an inner wall;
• and
• a source of cryogenic gas connected to said supply conduit and which provides said cryogenic gas to the end piece, wherein the metal tip of the end piece is adapted to freeze locally said human body area at a temperature lower than −50° C.,
• wherein the flexible tube is a two-conduit extruded tube through which the supply conduit and the discharge conduit extend so as to define a continuity of material between said outer wall of the flexible tube and said inner wall of the supply conduit.