Certified Hyperbaric Technologist Practice Test

What can result from a forceful valsalva maneuver during hyperbaric treatment?

1. Eardrum perforation

2. Round or oval window blowout

3. Lung barotrauma

4. Sinusitis

The correct answer is: Round or oval window blowout

The forceful Valsalva maneuver, which involves forcefully exhaling against a closed airway, increases pressure in the middle ear and can lead to various complications during hyperbaric treatment. One of the most serious risks associated with this maneuver is the potential for round or oval window blowout. These windows are delicate membranes located in the inner ear that can be ruptured due to excessive pressure changes created by a forceful Valsalva, especially in the context of the variable pressure experienced during hyperbaric therapy. When the pressure outside becomes significantly greater than that inside the inner ear, the structural integrity of the round and oval windows is compromised, which can lead to hearing loss, balance issues, or other auditory problems. The successful function of these windows is critical to maintaining proper ear pressure and fluid dynamics in the inner ear, thus any disruption can severely impact auditory function. Understanding the risks associated with the Valsalva maneuver is essential for those undergoing hyperbaric oxygen therapy and highlights the importance of proper pressure equalization techniques to prevent such injuries.