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PPT丨6岁以下儿童喘息病因鉴别诊断和初始处理临床实践专家共识

  • 2026-11-05 05:14:07
PPT丨6岁以下儿童喘息病因鉴别诊断和初始处理临床实践专家共识
共识速览
  1. 喘息定义与发生机制:喘息是呼吸时气道发出的持续、粗糙声音,因气体通过狭窄气道产生湍流冲击气道壁所致。广义喘息体征包含干啰音和喘鸣,干啰音分高调(如哮鸣音)和低调(如鼾音),喘鸣是吸气相大气道出现的高调乐性杂音。
  2. 喘息病因及分类:多种疾病可致儿童喘息,如感染、哮喘、异物等。分类方式多样,按喘息次数分为初次、复发性(≥2 次,间隔≥7d )和反复喘息(≥3 次);按诱因和预后分为发作性(多由病毒感染诱发)、多因性(多种诱因,有过敏史)和其他原因喘息(存在呼吸道基础疾病);按发作持续时间分为急性(<2 周)、迁延性(2 - 4 周)、持续性(>4 周);按症状严重度分为重症(有低氧血症)和轻症。
  3. 不同类型喘息的主要病因:反复喘息病因有哮喘、喘息性支气管炎等;持续喘息除哮喘未控制外,还包括支气管异物等;重症喘息主要由重度哮喘发作、异物吸入合并感染等引起。
  4. 诊断检查要点
    • 病史与体格检查:详细询问首次喘息时间、发作诱因等,了解既往病史和家族史。全面体格检查,评估生长发育,判断喘息特点和伴随症状。
    • 辅助检查:影像学检查如胸部 X 线、CT 等用于排查异物、气道狭窄等;肺功能检查辅助哮喘等诊断;变应原检测有助于哮喘诊断和病因判断;病原体检查针对可疑呼吸道感染患儿;支气管镜检查用于喘息原因不明等情况;还有口咽动态 pH 值监测等检查。
  5. 常见喘息疾病的识别诊断:如毛细支气管炎多由呼吸道合胞病毒感染引发;喘息性支气管炎与呼吸道感染有关;哮喘有反复咳嗽、喘息等特点;发作性喘息多由病毒感染诱发;多因性喘息诱因多样且有过敏史。
  6. 其他病因相关喘息的诊断:包括细菌、非典型病原体感染,气道异物,支气管和血管畸形,食物过敏,慢性肺吸入,免疫缺陷病,感染后 BO 炎,BPD,PCD 和 CF 等引起的喘息,各有相应的临床线索和诊断方法。
  7. 治疗药物及氧疗的应用:雾化吸入药物有 ICS、支气管舒张剂等,各有其适应证;糖皮质激素分全身和吸入应用;抗组胺药物和白三烯受体调节剂用于特定哮喘情况;抗菌药物依感染类型选用。重症喘息需氧疗,必要时采用无创正压通气等呼吸支持。
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