正常小儿呼吸应是平稳、无声响的。喉鸣是指吸气时喉头出现的哨音声响,应视为病理性,属于喉或全身某些疾病引起的一个症状。小儿喉的解剖生理特点是喉部细小,软骨支架相对软弱。会厌软骨窄而卷曲,喉粘膜下结缔组织疏松。此外,小儿神经易兴奋,机体抵抗力低,罹患呼吸道感染机会较多,这些因素均与小儿发生喉鸣有较密切的关系。喉鸣的小儿有时就诊于儿科,但儿科医生常因缺乏检查喉部的条件而不容易作出诊断。为此,本文拟将临床上常见的能引起喉鸣的疾病(其中大部分病儿不需行直接喉镜检查亦能得出诊断)加以分析,以供诊断喉鸣时参考。一、先天性喉软骨软症此症又称先天性喉喘鸣,是临床上引起喉鸣最常见的原因。该病虽冠以先天性, Normal breathing in children should be smooth, silent. Throat ringing refers to the whistle sound of throat when inhaling, which should be regarded as pathological and belongs to a symptom caused by larynx or systemic diseases. Pediatric laryngeal anatomy and physiology characteristics of small throat, cartilage scaffold is relatively weak. Epiglottic cartilage narrow and curly, laryngeal mucosa connective tissue loose. In addition, the nervous excitement in children, body resistance is low, there are more opportunities for respiratory infections, these factors are closely related to the occurrence of children with throat. Children with laryngopharyces are sometimes referred to pediatrics, but pediatricians are often not easily diagnosed due to the lack of conditions for examining the larynx. To this end, this article intends to be common in clinical disease can cause throat, most of whom do not need direct laryngoscopy can also be diagnosed) to be analyzed for the diagnosis of laryngopharyngeal reference. First, congenital laryngopharyngeal soft disease This disease, also known as congenital laryngeal wheeze, is the most common cause of clinical laryngeal muff. Although the disease is congenital,