What Researchers Did
Researchers tested whether high-pressure oxygen at 2.8 ATA changes how well common bacteria resist antibiotics, using a lab chamber to expose bacteria to hyperbaric conditions for 24 hours.
What They Found
For E. coli, Klebsiella pneumoniae, and Proteus mirabilis, hyperbaric oxygen did not meaningfully change the minimum antibiotic doses needed to kill them. However, Pseudomonas aeruginosa and related bacteria had their growth completely stopped under 2.8 ATA of 100% oxygen, and this growth suppression was reversible when pressure was removed.
What This Means for Canadian Patients
Patients receiving HBOT for wound infections do not need to worry that the treatment makes bacteria resistant to their antibiotics. The finding that hyperbaric oxygen completely stops Pseudomonas growth is especially relevant for patients with chronic wounds or ear infections caused by that bacteria, where HBOT may help antibiotics work more effectively.
Canadian Relevance
No direct Canadian connection identified.
Study Limitations
This was a lab-only study using bacteria in broth, results in living human tissue may differ because of immune cells, blood flow, and other biological factors.