Key points:
1. Acute epiglottitis has become a disease of adults and ultrasonography
can be an adjunct for diagnosis. However, the normal value of the
dimension of the epiglottis was lacking.
2. Male gender and higher BMI are associated with a thicker epiglottis
in Chinese healthy adults.
3. The Chinese adults have a relatively thinner epiglottis, compared
with that in American.