Eustachian Tube

The Eustachian tube is a narrow passage connecting the middle ear to the back of the throat, responsible for equalising pressure between the middle ear and the outside atmosphere. During climbs and descents, atmospheric pressure changes require this tube to open, allowing trapped gases to equalise. If blocked by a cold or infection, it can lead to severe pain and barotrauma.

Key Points

• •The Eustachian tube equalises middle ear pressure with the surrounding atmospheric pressure during altitude changes.
• •Swallowing or yawning helps manually open the tube to allow pressure equalisation.
• •Blockages caused by colds or infections can result in severe ear pain and barotrauma, particularly during descents.

Related Terms