This involves the oxyhealth vitaeris320 portable hyperbaric oxygen chamber.There was no problem with the chamber's functionality but a design flaw with the cover caused what could have been a dangerous situation, at the end of a period of self-treating i attempted to emerge from the chamber but could not turn the pressure release valve.Ultimately i had to exert nearly my full strength to open the valve while lying on my back.After exiting i discovered that several threads where the cover had been sewn together had come loose and contacted the valve stem.When i closed the valve from inside the chamber, the threads from the cover wrapped around the valve stem which, as i closed it created a tight a seal around the stem which made it almost impossible to release the valve.A person of lesser strength than i, a small woman for example, would possibly have not been able to exit the chamber until someone from outside the chamber worked the valve loose.This is a danger for a person who chooses to self treat.
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