What Researchers Did
Researchers in Israel measured actual tissue oxygen levels (TcPO2) in 130 chronic wound patients breathing 100% oxygen at both 1.4 ATA (the pressure used in low-pressure 'mild hyperbaric' chambers) and 2.0 ATA (standard clinical HBOT), to compare whether the low-pressure option delivers meaningful oxygen to wound tissue.
What They Found
At 1.4 ATA, average tissue oxygen near the wound was 161 mmHg after 10 minutes. At 2.0 ATA, the average was 333 mmHg, more than double (p < 0.001). The difference was statistically significant across all 130 patients and after both 5 and 10 minutes of oxygen breathing. Researchers found no evidence supporting the claim that 1.4 ATA treatment benefits chronic wound patients.
What This Means for Canadian Patients
Many Canadians are paying out of pocket for 'mild hyperbaric' sessions in soft-sided or portable chambers at 1.3-1.4 ATA, often marketed as equivalent to medical HBOT. This study provides objective measurement data showing that these chambers deliver less than half the tissue oxygen of clinical HBOT. Canadians seeking HBOT for wound healing should use an accredited medical centre operating at 2.0 ATA or higher.
Canadian Relevance
No direct Canadian connection identified. However, the proliferation of low-pressure 'wellness' chambers in Canada makes this research directly relevant to Canadian consumer safety and spending.
Study Limitations
The study only measured tissue oxygen levels and did not track actual wound healing outcomes, so it cannot confirm whether the lower oxygen delivery at 1.4 ATA results in worse healing in practice.