The RejuvenAir System, developed by CSA Medical, is a breakthrough interventional device for treating chronic obstructive pulmonary disease with chronic bronchitis. It uses software-driven dosimetry and specialty catheters to deliver cryogen spray inside the airways, freezing and eliminating damaged cells. This leads to a rejuvenating pattern of healing, reduced mucous production, cough, and inflammation in patients. The system is approved in the EU and currently under clinical investigation in the United States. CSA Medical also provides cryotherapy systems, including the CryoSpray Ablation system, which allows physicians to freeze and remove unwanted tissues using liquid nitrogen passed through a standard endoscope.