Wound, Ostomy and Continence Nurses Society (WOCN) Practice Exam

What is the primary benefit of hyperbaric therapy for wound healing?

1. Reduction of edema

2. Enhanced oxygen delivery to tissue

3. Direct application of pressure

4. Elimination of necrotic tissue

The correct answer is: Enhanced oxygen delivery to tissue

The primary benefit of hyperbaric therapy for wound healing lies in enhanced oxygen delivery to tissue. When a patient is placed in a hyperbaric chamber, they breathe 100% oxygen at pressures higher than normal atmospheric pressure. This increase in oxygen availability significantly elevates the oxygen concentration in the bloodstream, leading to improved oxygen diffusion into tissues. Enhanced oxygen delivery is vital for various cellular processes, including collagen formation, angiogenesis (development of new blood vessels), and the overall healing response in tissues that may be compromised due to injury or poor blood circulation. While other benefits, like reduction of edema or elimination of necrotic tissue, can occur as secondary effects of increased oxygenation and improved circulation, the fundamental mechanism by which hyperbaric therapy promotes wound healing is through its augmentation of oxygen supply to hypoxic tissues. This is crucial for the healing process, especially in chronic wounds, where oxygen levels may be inadequate to support tissue repair and regeneration.