The aim of this study is to measure the dimension of airway in healthy Asian population. We recruit normal volunteer subjects aged more than 20 years old. Subglottic transverse diameter is measured and recorded by ultrasonography.
The aim of this study is to measure the dimension of airway in healthy Asian population. We recruit normal volunteer subjects aged more than 20 years old. Subglottic transverse diameter is measured and recorded by ultrasonography.