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一般认为在正常孕期循环血容量虽增加,但由于外周血管扩张,血管阻力减低,血压反比非孕期稍低,脉压加大。孕30周时孕妇平均血压最低,孕9个月后则缓慢增高,至预产期恢复到孕前水平。孕期高血压的原因有妊娠中毒症(妊毒症)及慢性高血压、肾炎等。其中大部为妊毒症,而慢性高血压和肾炎合并妊娠者较少见。一、纯妊毒症据日本卫生部统计(1978),妊毒症占
Generally believed that although the increase in circulating blood volume during normal pregnancy, but due to peripheral vasodilation, vascular resistance decreased, blood pressure was slightly lower than non-pregnancy, pulse pressure increased. The average pregnant woman’s blood pressure was the lowest at 30 weeks of gestation, slowly increased at 9 months of gestation, and returned to the pre-gestation level before the expected date of birth. Pregnancy causes of hypertension are gestosis (pregnancy-induced poisoning) and chronic hypertension, nephritis and so on. Most of them are pregnancy-induced insults, while those with chronic hypertension and nephritis are less common. First, pure pregnancy According to the Japanese Ministry of Health statistics (1978), pregnancy-induced hepatitis accounted for