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1、Congenital lesions of larynx,Congenital stridor common in infantscauses：laryngeal cartilages hypoplasia calciumdeficiency-laryngeal chondromalacia symptoms：1）three depressions sign 2）wheezetreatment：1）symptom-free，no particular treatment-take in more calcium and cod liver oil 2）side-lying 3）tracheot
2、omy,laryngeal web,laryngomalacia,Inflammatory diseases of the larynx,Acute epiglottitisA common disease,often misdiagnosed,can cause dyspnea and threaten patients lifecauses：bacterial or viral infection,allergy,foreign body,trauma,inspiration of chemicals,spread of inflammation from pharyngitis,Infl
3、ammatory diseases of the larynx,Acute epiglottitissymptoms：acute onset,high fever,sore throat,dysphagia,unclear articulation,dynpnea,Inflammatory diseases of the larynx,Acute epiglottitisexam：oropharynx is normal,congestion and edema of the epiglottis,difficult to explore the vocal cords,Acute epigl
4、ottitis,Inflammatory diseases of the larynx,Acute epiglottitistreatment：systemic administration of antibiotics and corticosteroid.tracheotomy if necessary incise the epiglottic abscess if it is formed,Inflammatory diseases of the larynx,Acute laryngitiscauses：infection,vocal overuse,inhalation of to
5、xic gassymptoms：hoarseness,sore throat,cough,Inflammatory diseases of the larynx,Acute laryngitisexam：diffused congestion and edema of the vocal cordstreatment：vocal rest,nebulization therapy with antibiotics,steroid and traditional Chinese medicines,Inflammatory diseases of the larynx,Acute laryngi
6、tis in childrenOften occurred in children from 6m3ycauses：caused by infectious diseases or upper respiratory tract infection,Inflammatory diseases of the larynx,Acute laryngitis in childrensymptoms：cough，Three-concave sign,inspiratory dyspnea,fever and restlessnessexam：congestion and edema of laryng
7、eal mucosa,especially subglottic mucosa,Inflammatory diseases of the larynx,Acute laryngitis in childrendifferential diagnosis：glottic spasm,foreign body of respiratory tract,diphtheriatreatment：antibiotic and steroid tracheotomy if necessary supporting treatment,Inflammatory diseases of the larynx,
8、Chronic laryngitiscauses：occupational（teachers,shop employees chronic inflammation of nose,sinus and pharynx acute laryngitis lower respiratory tract infection long term inspiration of toxic gas,Inflammatory diseases of the larynx,Chronic laryngitissymptoms：repeated hoarseness,discomfort and foreign
9、 body sensation of the throatexam：chronic congestion of laryngeal mucosa with mild edema,VC hypertrophy or atrophytreatment:etiological treatment,traditional Chinese medicine,Inflammatory diseases of the larynx,Vocal nodules&polypscauses：vocal overuse and abusesymptom：hoarsenessexam:laryngoscopic examination,Vocal nodules and polyps,Inflammatory diseases of the larynx,treatment：complete vocal rest and nebulization therapysurgery：under direct laryngoscope,fiberscope and microscope,
