A diver's inability to equalize their ears during ascent might lead to what condition?

The inability to equalize pressure in the ears during ascent can lead to a condition known as a reverse block, which is particularly problematic for divers. When a diver ascends, the pressure outside the body decreases, and if air cannot escape from the middle ear due to blockage (like mucus or a closed Eustachian tube), the pressure inside the ear can become lower than the external pressure. This can cause a feeling of discomfort or pain as the pressure difference increases.

In addition to the reverse block, the diver might also experience barotrauma. This is a broader term that encompasses injuries caused by changes in pressure, and in this case, it specifically refers to injury to the ear due to pressure imbalances that can lead to complications such as rupture of the eardrum or damage to the middle ear structures.

Both block (which typically refers to difficulty equalizing during descent) and reverse block can occur in relation to ear equalization issues. Understanding that both can result from the same failure to equalize emphasizes the importance of proper equalization techniques and being aware of pressure changes during diving. Conditions like ototoxicity, which refers to damage to the ear or hearing, typically arise from chemical exposure rather than pressure changes and are not a direct result of