CPL Human Factors · Mock exam

Sinus barosinusitis (sinus squeeze) can occur during both ascent and descent. How does the pathophysiology differ between the two?

• A.barosinusitis affects only the frontal sinuses and never involves the maxillary or ethmoid sinus cavities
• B.on ascent, expanding sinus air cannot escape if the ostia are blocked, causing positive-pressure pain
• C.sinuses do not contain air
• D.sinus barosinusitis only occurs during descent