None of the above.
Tracheobronchial obstruction is seen in the image.
It is an abnormal, high-pitched sound produced by turbulent airflow through a partially obstructed airway .
- Inspiratory stridor – obstructive lesions of supraglottis or pharynx
- Expiratory stridor – obstructive lesions of thoracic trachea, primary and secondary bronchi
- Biphasic stridor – lesions of glottis, subglottis and cervical trachea