Difference Between The Eustachian Tube of Infants and Adults

The following table summarizes the differences between the eustachian tube of an infant and an adult

InfantAdult
Length18 mm36 mm
DirectionMore or less
horizontal (makes an
angle of 10° with the
horizontal plane)
Oblique, directed
downwards, forwards
and medially (makes
an angle of 45° with
the horizontal plane)
Angulation of
isthmus
No angulationAngulation present

the eustachian tube of an infant and an adult

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