RSV毛细支气管炎外周血嗜酸粒细胞与婴幼儿哮喘关系

【关键词】 ,呼吸道合胞病毒;,,毛细支气管炎;,,哮,,喘;,,嗜酸粒细胞增多

摘要: 目的:探讨婴幼儿呼吸道合胞病毒(RSV)毛细支气管炎急性期外周血嗜酸粒细胞增多对预测日后发生婴幼儿哮喘是否有意义。方法:检侧60例首次患RSV毛细支气管炎婴幼儿急性期外周血嗜酸粒细胞的绝对及相对计数,并在该组患者3周岁时进行电话随访,根据毛细支气管炎发病后有无反复发作喘息将成功随访的43例患儿分成2组:无喘息发作组和哮喘组,同时记录哮喘家族史。结果:哮喘组在RSV毛细支气管炎急性期嗜酸粒细胞增多人数明显多于无喘息发作组, 毛细支气管炎急性期嗜酸粒细胞增多患儿发生婴儿哮喘的比率,与无嗜酸粒细胞增多者比较,差异有显著性意义(χ2= 8.23,P0.05)。结论:RSV毛细支气管炎急性期嗜酸粒细胞增多日后易发生婴幼儿哮喘

关键词: 呼吸道合胞病毒; 毛细支气管炎; 哮 喘; 嗜酸粒细胞增多

The Associaton Between Eosinophilia in Respiratory Syncytial Virus Bronchiolitis and Infant Asthma。

LIU Jian—ying, LV Liang, FENG Jun。

(Central  Hospital of Chengde City, Hebei Chengde 067000, China)。

Abstract: Objective: To determine whether eosinophilia at the time of acute RSV bronchiolitis could predict the presence of infant asthma. Methods: 60 cases with RSV bronchiolitis were examined for peripheral blood eosinophil counts in the acute phrase,and followed—up when the infants were 3—year old. Their parents were asked whether the study subject had experienced any wheezing after the initial episode of bronchiolitis. 43 cases who can be followed up were divided into 2 groups: no recurrent wheezing and asthma according the material afforded by parents. Results: Eosinophil counts at the time of RSV bronchiolitis in asthma group were greater than that in no recurrent wheezing group(P0.05). Conclusion: Eosinophilia at the time of RSV bronchiolitis may predicts the development of asthma in infancy.

Key words: Respiratory syncytial virus; Bronchiolitis; Asthma; Eosinophilia。

毛细支气管炎婴幼儿时期的常见病,多由呼吸道合胞病毒(RSV)引起,l/3以上的病人日后可发展成哮喘,目前尚无确定因素预测RSV毛细支气管炎后是否发生哮喘,但已证明嗜酸粒细胞增加与儿童哮喘有关。本研究旨在观察RSV毛细支气管炎患儿急性期外周血嗜酸粒细胞增多对预测发生婴幼儿哮喘的意义。

1 资料与方法  1.1 一般资料: 60例于1999年11月至2003年3月期间的住院患儿,临床诊断符合《小儿四病防治方案(二)》中毛细支气管炎的诊断标准,并除外支气管肺发育不良,先天性心脏病及结核感染。年龄3~14个月,所有患儿均为喘息首次发作

1.2 方法:毛细支气管炎患儿人院当日取微量静脉血用ELESA法测定RSV— IgM ,阳性证明RSV感染,采外周静脉血1mL测定白细胞计数及分类,计算出外周血嗜酸粒细胞绝对和相对计数。详细记录家长姓名、住址、联系电话。

1.3 随访:患儿在年龄满3周岁时进行电话随访,成功随访43例,询问患儿毛细支气管炎后是否有喘息发作发作次数,以及哮喘家族史、被动吸烟史,根据婴幼儿哮喘诊断标准将43例患儿分成2组:无喘息发作组(A组)、婴幼儿哮喘组(B组)。

1.4 统计学处理: 采用X2检验。

表1 两组急性期外周血嗜酸粒细胞计数增高比率(略)。

2 结果。

2.1 两组患儿急性期外周血嗜酸粒细胞计数增高比率见表1,提示哮喘嗜酸粒细胞增多比率明显高于非哮喘组(X2= 8.23,P<0.05 )。

2.2 RSV毛细支气管炎急性期外周血嗜酸粒细胞计数与日后哮喘的关系:RSV毛细支气管炎急性期嗜酸粒细胞增多患儿发生婴儿哮喘的比率,与无嗜酸粒细胞增多者比较差异有显著性意义(χ2= 8.23, P0.05),见表2。

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