The change of asthma course during pregnancy.

摘要: The course of asthma during pregnancy is variable. When the total pregnant asthmatic population considered, one-third improve, are unchanged, and experience increased symptoms. may be influenced by many physiologic changes as well severity pre-existing asthma. Prospective studies have found that severe asthmatics exacerbations more often than mild asthmatics. first trimester last month relatively free exacerbations. second third trimesters potential for symptoms need medications. Change in allergic nasal precede similar pregnancy. labor delivery worsened only 10% patients, their problems usually mild. Postpartum most women return to prepregnant state within 3 mo. Physiologic affect pulmonary function with a decrease functional residual capacity (FRC) 50% increase minute ventilation. This change results hyperventilation 60–70% normal pregnancies sensation dyspnea can distressing an asthmatic. There also congestion 22–72% beginning trimester, which gastrointestinal system affected having gastroesophagel reflex disease (GERD). Undertreatment remains problem emergency departments. With awareness patient's prepragnant state, careful monitoring will prevent serious complications.