That’s the exact one we use at our wound care clinic. You don’t just climb in there and go to sleep.
THese are used also for The Bends from scuba diving, but it can also cause the bends if you come up to fast.
You need a technician.
Like I said. I’m sure the unit works, but you would need to pay someone about $100-$200 per day, along with the cost of the unit.
SO, around $35,000-$40,000 per year.