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毛细支气管炎症状

来源:[标签:来源] | 发布时间:2011-07-21 19:26:17 | www.chinesejk.com

  本病仅发生于2岁以下小儿,多数在6个月以内。喘憋和肺部哮鸣。呼吸困难可呈阵发性,间歇期呼气性哮鸣消失,严重发作者,面色苍白、烦躁不安,亦口周和口唇发绀。全身中毒症状较轻,可无热、低热、中度发热、少见高热。体检发现呼吸浅而快,60—80次/分,甚至100次/分,伴鼻翼扇动和三凹征;心率加快,可达150—200次/分,肺部体征主要为喘鸣音,叩诊可呈鼓音,喘憋缓解期可闻及中、细湿罗音肝脾可由于肺气肿而推向肋缘下,因为可触及肝脏和脾脏。由于喘憋,PaO2降低,PaCO2升高,SaO2降低而致呼吸衰竭。本病高峰期在呼吸困难发生后的48—72小时,病程一般约为1周至2周。

  病因

  主要由呼吸道合胞病毒(RSV)引起,副流感病毒之某些腺病毒及肺炎支原体也可引起本病,最近发现人类偏肺病毒(HMPV)也是引起毛细支气管炎的病原体。

(编辑:小鱼 )

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