Certified Transport Registered Nurse Certification Practice Exam

When does barosinusitis typically occur during an airplane flight?

1. Ascent

2. Descent

3. Level flight

4. Before takeoff

The correct answer is: Descent

Barosinusitis typically occurs during descent because this phase of the flight involves changes in atmospheric pressure that can affect the sinuses. As the airplane descends, the increased pressure outside can make it difficult for air to equalize within the sinus cavities. If the sinus openings are blocked, the inability to balance the pressure may lead to pain and discomfort known as barosinusitis. This is particularly common in individuals who have pre-existing sinus conditions, allergies, or upper respiratory infections, as these factors can exacerbate the blockage. During ascent and level flight, while pressure changes occur, they do not usually lead to the same degree of pressure imbalance in the sinuses as experienced during descent. Before takeoff, the cabin is at equal pressure to the outside environment, so barosinusitis is unlikely to occur at that stage.