Treatments are quite fast and result in nearly instantaneous pain reduction thanks to a disruption in the functionality of nerve axons. This happens without damaging the surrounding tissue that surrounds the nerves.
The FDA clearance was based on a recent prospective, multi-center, sham-controlled, randomised, double-blind study of 180 subjects. The study concluded that patients treated with the iovera device reported statistically significant greater reduction in pain and improvement in symptoms (p=0.001) when compared to patients who received the sham treatment(3). Also, patients who received the iovera° treatment reported pain relief lasting up to 90 days, accompanied by reduced stiffness and improved physical function.
https://www.youtube.com/watch?v=100351517