Certified Hyperbaric Technologist Practice Test

Which of the following describes a key characteristic of vascular response during HBOT?

1. Increased peripheral blood flow

2. Decreased oxygen availability

3. Hyperoxygenation

4. Reduced interstitial pressure

The correct answer is: Hyperoxygenation

Hyperbaric oxygen therapy (HBOT) is a treatment that involves breathing pure oxygen in a pressurized environment. A key characteristic of the vascular response during HBOT is hyperoxygenation, which refers to the increased amount of oxygen dissolved in the plasma and delivered to tissues. During the treatment, the pressure increases the volume of oxygen that can be absorbed by the blood. This hyperoxygenation has profound effects on the body, including improving oxygen supply to hypoxic tissues, promoting angiogenesis, and enhancing the healing of wounds. It plays a crucial role in combating conditions like carbon monoxide poisoning, decompression sickness, and chronic non-healing wounds. In contrast, increased peripheral blood flow and reduced interstitial pressure may occur as secondary effects of the improved oxygenation and healing processes but are not primary characteristics of the vascular response itself. Decreased oxygen availability is contrary to the principles of HBOT, as the therapy aims to increase rather than decrease oxygen levels in tissues.