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Stridor (Latin for "creaking or grating noise") is a high-pitched breath sound resulting from turbulent air flow in the larynx or lower in the bronchial tree. It should not to be confused with stertor which is a noise originating in the pharynx. Stridor is a physical sign which is caused by a narrowed or obstructed airway. It can be inspiratory, expiratory or biphasic, although it is usually heard during inspiration. Inspiratory stridor often occurs in children with croup. It may be indicative of serious airway obstruction from severe conditions such as epiglottitis, a foreign body lodged in the airway, or a laryngeal tumor. Stridor should always command attention to establish its cause. Visualization of the airway by medical experts equipped to control the airway may be needed. ==Causes== Stridor may occur as a result of: * Foreign bodies (e.g., aspirated foreign body, aspirated food bolus); * Tumor (e.g., laryngeal papillomatosis, squamous cell carcinoma of larynx, trachea or esophagus); * ALL (T-cell ALL can present with mediastinal mass that compresses the trachea and causes inspiratory stridor); * Infections (e.g., epiglottitis, retropharyngeal abscess, croup); * Subglottic stenosis (e.g., following prolonged intubation or congenital); * Airway edema (e.g., following instrumentation of the airway, tracheal intubation, drug side effect, allergic reaction); * Laryngospasm (from aspiration, GERD, or complication of anesthesia) * Subglottic hemangioma (rare); * Vascular rings compressing the trachea; * Many thyroiditis such as Riedel's thyroiditis; * Vocal cord palsy; * Tracheomalacia or Tracheobronchomalacia (e.g., collapsed trachea). * Congenital anomalies of the airway are present in 87% of all cases of stridor in infants and children. * Vasculitis. *infectious mononucleosis *peritonsillar abscess 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Stridor」の詳細全文を読む スポンサード リンク
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