[Analysis of infants with moderate to severe laryngomalacia].

Objective:To investigate the clinical features and the treatment of moderate-severe laryngeallacia, and the application of CO₂laser supraglotation in laryngeallacia.Method:Collecting the clinical data of 18 infants with moderate-to-severe laryngeallacia diagnosed in our hospital,10 cases were moderate. Eight cases were severe children; according to the classification of laryngeallacia, most of them were mixed type, including 2 cases of type Ⅱ, 3 cases of type Ⅲ, 5 cases of typeⅠ + type Ⅱ, 7 cases of typeⅡ+ type Ⅲ, and 1 case of typeⅠ+ typeⅡ + type Ⅲ. Among them, 8 patients underwent CO₂laser supraglotation,10 patients underwent conservative treatment.The children underwent surgery to evaluate the improvement of laryngeal wheezing, respiration, body weight, and Diet situation. All children were followed up for 12 months.Result:Eight cases with severe laryngeallacia receving CO₂laser supraglotation had rapid improvement after surgery, including laryngeal wheezing, dyspnea, and cough symptoms. They were completely cured 3 months after surgery; None of the 10 cases of moderate children were cured in 3 months, 2 cases of laryngeal wheezing and dyspnea basically disappeared in 6 months, 7 cases improved, 1 case was in the plateau stage; Despnea in 8 cases of children basically disappeared 12 months later and 2 cases with mild throat wheezing, continuing conservative treatment; The weight changes, diet and respiration were closely monitored in all 18 children. The weight of the 5 children after surgery in the 3, 6 and 12 months were significantly higher than that in the untreated children. The difference was statistically significant (P<0.05).Conclusion: Electronic laryngoscope should be taked when children are suspected of laryngeal asthma, which could help diagnose moderate-severe laryngeallacia. Follow-up should be done closely. CO₂laser supraglottic surgery for severe laryngeallacia, can relieve dyspnea, throat wheezing, eating difficulties and gain weight. The surgical is safety with very slight trauma and less complications, which is worth promoting; for moderate laryngeal softening, close follow-up is recommended, most of which can be treated conservatively. If there is a change in the condition, surgery should be considered.