I first ran across this idea in late 1970 in a medical clinic where I did testing. It was also used to expand chest and vital capacity in kids with brain injury who did very little exercise (the increased CO2 requires deeper breathing to get the same amount of oxygen into the lungs). Nice to see an actual design for the mask rather than the tinkered version we used.
BalancAir is a medical device company specializing in stopping seizures in patients suffering from epilepsy. The company will be selling a medical mask that offers a safe and drug free alternative to current treatments. The mask increases the CO2 in the air the patient breaths in and thus decreases the PH value in the patient’s blood, stopping the seizure. Every year in the US alone app. 50,000 people die from prolonged epileptic seizures. The BalancAir mask stops these prolonged seizures within 20 sec. where current drug based treatment takes at least 5-10 minutes to work.