Does it help to turn the pressure on the hyperbaric chamber too low?

No. According to the query Baidu health information shows, hyperbaric oxygen chamber air pressurization maximum working pressure is not greater than 0.3 MPa, oxygen pressurization maximum working pressure is not greater than 0.2 MPa, not in this numerical value within the range of too high or too low pressure will have an impact on the patient, so hyperbaric oxygen chamber open pressure is too low have no effect. Hyperbaric oxygen chamber is a specialized medical equipment for hyperbaric oxygen therapy, with a wide range of clinical mainly used for anaerobic infections, carbon monoxide poisoning, gas embolism and other treatments.