Eustachian
[ju:s'teiʃiən]
[医] 咽鼓

1. The child has earache caused by blocked Eustachian tubes.
   孩耳咽堵塞而起耳痛.
2. The culprit is the inability of the Eustachian tube to open.
   问题咽鼓通起。
3. There is good evidence that if baby is given a bottle of formula while lying flat, the formula can get into the Eustachian tubes and middle ear and cause an infection.
   证据瓶喂配躺着宝宝，配宝宝耳咽耳，而起感染。

Eustachian \Eu*sta"chi*an\, a. [From Eustachi, a learned Italian
physician who died in Rome, 1574.] (Anat.)
(a) Discovered by Eustachius.
(b) Pertaining to the Eustachian tube; as, Eustachian
catheter.

{Eustachian catheter}, a tubular instrument to be introduced
into the Eustachian tube so as to allow of inflation of
the middle ear through the nose or mouth.

{Eustrachian tube} (Anat.), a passage from the tympanum of
the ear to the pharynx. See {Ear}.

{Eustachian valve} (Anat.), a crescent-shaped fold of the
lining membrane of the heart at the entrance of the vena
cava inferior. It directs the blood towards the left
auricle in the fetus, but is rudimentary and functionless
in the adult.