Patent ID: 8083733
Filing Date: 2011-12-27
Classification: A61B

Abstract:
1. A cryosurgical instrument operating on cryogen in liquid or gaseous-liquid forms; comprising: an external shaft; a cryotip joined with a distal edge of said external shaft; a feeding lumen, at least partially situated in an internal space of said external shaft and cryotip, wherein a proximal edge of said external shaft is joined with a proximal section of said feeding lumen; and wherein a distal section of said feeding lumen is helically coiled, so that an outer diameter of the helically coiled distal section fits an inner diameter of a cylindrical envelope of said cryotip, and said helically coiled distal section and said cylindrical envelope are in thermal contact, the instrument further comprising a wire spiral installed in the helically coiled distal section.