The Evaluation of Airway Dimension by Using Ultrasonography

The Evaluation of Airway Dimension by Using 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.

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.

Inclusion Criteria:

• Adult healthy volunteers (aged more than 20 years) without pre-existing airway or respiratory diseases, neck tumors and a history of neck operation.

Exclusion Criteria:

• pre-existing airway or respiratory diseases, neck tumors and a history of neck operation.