Anatomic site of origin of stridor is
A. LarynxB. Bronchus
C. Bronchiole
D. Trachea
E. Pharynx
The
Answeris. (A) Larynx ; (B) Bronchus ; (D)
Trachea:
• Stridor may be
— Inspiratory:
Often produced in obstructive lesions of supraglottis or pharynx. e.g.
Laryngomalacia, or retropharyngeal abscess.
— Expiratory: is produced in lesions of thoracic trachea, Primary and secondary
bronchus e.g. bronchial foreign body; tracheal stenosis.
— Biphasic stridor: is seen in lesions of glottis, subglottis, and cervical trachea
e.g. Laryngeal Papilloma, Vocal Cord paralysis and suhglottic stenosis.
• So, stridor may arise from lesion of nose, tongue,
mandible, pharynx, larynx or trachea, and primary and secondary bronchi.
• Other causes of stridor are (i) Vascular rings, oesophageal atresia, tracheo-oesophageal fistula, congenital goitre, cystic hygroma.
• Other causes of stridor are (i) Vascular rings, oesophageal atresia, tracheo-oesophageal fistula, congenital goitre, cystic hygroma.
(ii) Retropharyngeal and retrooesophageal abscess.
(iii) Foreign body in oesophagus.
(iv) Neck mass
