12 Questions
What is the main symptom of 'reverse- or external ear squeeze'?
Outward bulging of the tympanic membrane
At what pressure differential does the eustachian tube become locked and unable to open for equalization?
13 kPa
What can occur if a reduced pressure persists in the middle ear due to eustachian tube dysfunction?
Middle ear bleeding
Why does the middle ear pressure increase with descent for divers?
Expansion of air in the middle ear
What is the characteristic feature of 'the bends' that was originally identified in caisson workers?
'Reverse- or external ear squeeze'
What can result from a rapid or significant pressure change in the middle ear?
'Tympanic membrane perforation'
Which part of the body most frequently suffers pathological consequences from barotrauma?
Ear
What does barotrauma imply?
Damage to the body structures due to changes in atmospheric pressure
According to Boyle’s law, what happens to the volume of a gas as the ambient pressure increases?
The volume decreases
In diving, at what depth does the greatest change in volume occur according to the pressure and volume relationship?
10 m
What gas, making up approximately 80% of inspired air, is absorbed by tissues during diving?
Nitrogen
What happens if the rate of ascent during diving is too quick?
Nitrogen comes out of solution as gas bubbles in the tissues
Learn about barotrauma, a condition caused by changes in atmospheric pressure, and how it is influenced by Boyle's law. The quiz covers the effects of barotrauma on different body structures such as the ears, lungs, and sinuses, common occurrences during flying, diving, and hyperbaric oxygen treatment.
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