Certified Hyperbaric Technologist Practice Test

What effect does HBO treatment have on gas gangrene?

1. Completely eliminates the infection

2. Slows the growth of C. perfringens with a high dose of oxygen

3. Reduces the need for surgical intervention

4. Prevents anaerobic conditions

The correct answer is: Slows the growth of C. perfringens with a high dose of oxygen

The option highlighting that HBO treatment slows the growth of C. perfringens with a high dose of oxygen is correct due to the specific role that hyperbaric oxygen therapy plays in managing gas gangrene. Gas gangrene is primarily caused by the bacterium Clostridium perfringens, which thrives in anaerobic (low oxygen) environments. When hyperbaric oxygen therapy is applied, it introduces elevated levels of oxygen into the tissues, creating a significantly more oxygen-rich environment. This high concentration of oxygen can inhibit the growth and reproduction of anaerobic bacteria like C. perfringens by disrupting their metabolic processes and oxygen requirements for growth. Consequently, the infection's progression is halted, allowing the body's immune system a better opportunity to combat the remaining pathogens. While HBO therapy can support wound healing and reduce the severity of the infection, it is important to note that it does not completely eliminate the infection on its own. Surgical debridement is often necessary to remove necrotic tissue and further control the infection. Other aspects of the therapy, such as preventing anaerobic conditions, occur as a beneficial side effect rather than being the primary action of HBO in treating gas gangrene.