孕期上呼吸道感染易致产科并发症,其发病机制目前尚未肯定。有人提出可能是激素对喉粘膜多糖的解聚作用，导致结合水能力增强，从而引起喉水肿有关。喉病变包括粘膜水肿、干燥以及偶发结痂、且在妊娠末期三个月最突出，60～65％的孕妇有声嘶和／或呼吸困难，其局部组织水肿加重 Upper respiratory tract infection during pregnancy prone to obstetric complications, the pathogenesis is not yet sure. It has been proposed that depolymerization of hormones on laryngeal mucosal polysaccharides may lead to increased ability of bound water to cause laryngeal edema. Lesions of the larynx include mucosal edema, dryness and occasional crusting and are most prominent in the third trimester of pregnancy, with 60 to 65% of pregnant women having hoarseness and / or dyspnea with increased local tissue edema