The Cryotherapy System, used in conjunction with a Airway Cryo-balloon Catheter, employs liquid nitrogen as the cryogenic medium to perform cryoablation for airway stenosis. This combined therapy enables enhanced airway patency, delays lesion recurrence, and prolongs the time to airway restenosis. The equipment demonstrates rapid, continuous, and stable delivery of cryogen to the integrated catheter balloon, achieving reliable and efficient cryoablation through precise thermal control.