Explain how hyperbaric chambers can aid injury rehabilitation.

• A. They deliver oxygen at high pressure; 100% oxygen; saturate haemoglobin; excess oxygen dissolved in plasma.
• B. They decrease oxygen delivery.
• C. They reduce oxygen in the blood.
• D. They only help with pain relief.

Answer: (A)

Hyperbaric chambers aid injury rehabilitation by boosting oxygen delivery to damaged tissues. When a person breathes 100% oxygen at pressures higher than normal, the amount of oxygen dissolved directly in the plasma rises dramatically. This means tissues with poor blood flow still receive much more oxygen than they would under normal air, raising tissue oxygen tension and supporting healing processes.

That extra oxygen fuels aerobic metabolism, helping cells produce the energy needed for repair. It also promotes collagen synthesis and fibroblast activity, supports new blood vessel growth, and enhances the function of white blood cells to fight infection. In addition, the higher oxygen level can reduce edema and inflammation, aiding recovery without compromising oxygen delivery to injured areas.

The other ideas—decreasing oxygen delivery, reducing blood oxygen, or providing only pain relief—don’t describe how hyperbaric therapy works. The key benefit is the increased dissolved oxygen in plasma at high pressure, enabling faster and more effective tissue repair during rehabilitation.