Otic barotrauma Health Dictionary

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Otic Barotrauma: From 1 Different Sources

Also called aerotitis, this is blockage of the Eustachian tubes between the middle EAR and the PHARYNX as a result of rapidly changing external air pressure, such as occurs during descent of an aircraft. VALSALVA’S MANOEUVRE – pinching the nose with ?nger and thumb and attempting to blow hard through the nose – will usually relieve the blockage. People prone to this phenomenon may ?nd nasal decongestants helpful.
Health Source: Medical Dictionary
Author: Health Dictionary

Barotrauma

Damage or pain, mainly affecting the middle ear and facial sinuses, that is caused by changes in surrounding air pressure. Air travellers are at the greatest risk, but scuba divers face similar problems (see scuba-diving medicine). Aircraft cabin pressure decreases as the plane ascends and increases as it descends. As the aircraft ascends, the ears may “pop” as the air in the middle ear expands and is expelled via the eustachian tubes, which connect the middle ear to the back of the throat. On descent, the higher pressure may push the eardrum inwards and cause pain. Minor pressure damage in the middle ear may cause pain, hearing loss, and tinnitus for a few days; damage within the facial sinuses may also cause pain, and possibly a discharge of mucus or blood. Symptoms usually wear off within hours or days, but treatment may be needed if they worsen or persist. Large pressure changes can rupture the eardrum (see eardrum, perforated).

Barotrauma can be avoided by vigorous swallowing or by forcibly breathing out with the mouth closed and the nose pinched (the Valsalva manoeuvre). This action equalizes the internal and external pressures in the middle ear and sinuses. If the eustachian tubes are blocked, as commonly occurs with a cold, use of a nasal spray containing a decongestant drug is recommended shortly before the descent of the aircraft. Infants should be breast- or bottle-fed during descent to encourage swallowing. (See also aviation medicine.)... barotrauma

Otic

adj. relating to the ear.... otic

Otic Capsule

the cup-shaped cartilage in the head of an embryo that later develops into the bony *labyrinth of the ear.... otic capsule

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