Cryogenic Probe Filtration System

Abstract

A cryogenic device having a filter device fluidly connected between a valve and a cooling fluid cartridge. The filter device filters solid and fluid impurities received from the cartridge. The filter device also captures fluid impurities from the cryogenic device when not in use.

1 . A cryogenic device comprising:
 a handpiece portion having a cryogenic coolant pathway configured to fluidly couple to a detachable needle probe; and   a cartridge holder coupled to the handpiece portion and configured for removeably holding a pressurized cartridge; and   a filter device coupled to the cartridge holder, the filter device having a distal filter end for fluidly coupling the filter device to the cryogenic coolant pathway and a proximal filter end for fluidly coupling to the pressurized cartridge;   wherein the filter device comprises:
 at least one particulate filter configured to filter particulates; and 
 a molecular filter configured to capture fluid contaminants received from the cartridge and from the coolant pathway when not in fluid communication with the cartridge.