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引言在近廾年中,前置胎盘的处理已有不少的进展。在适当情况下,输血、剖腹产术、磺胺与抗菌素的应用,使母子双方死亡率大为减低。自1945年Johnson与Macafee二氏提出期待疗法后,胎儿死亡率进一步显著下降。根据Lewis氏的统计,产母死亡率已自2.6％—7％降低至0.4％—0.73％,胎儿死亡率已由51％—59％降低至16％—21％。期待疗法的优越性为能预防早产引起的新生儿死亡。但是,在处理前置胎盘时,因选择疗法不当而直接造成的宫内胎儿死亡,可能较早产问题更为严重,这种死产的形成与妊娠期限或胎儿成熟度完全无关。Williams氏曾研究105例用期待与其他疗法处理前置胎盘,胎儿与新生儿的总死亡率为28％,
Introduction In the recent years, there have been many advances in the treatment of placenta previa. Where appropriate, blood transfusions, caesarean sections, and the use of sulfonamides and antibiotics have resulted in a much lower maternal-to-child mortality rate. Fetal mortality has dropped significantly further since the expectation of treatment was introduced by Johnson and Macafee in 1945. According to Lewis’s statistics, maternal mortality has dropped from 2.6% -7% to 0.4% -0.73% and fetal mortality has dropped from 51% -59% to 16% -21%. Expecting the superiority of therapies to prevent neonatal deaths caused by premature birth. However, in the treatment of placenta previa, improper selection therapy due to intrauterine fetal death may be more serious than the problem of preterm birth, such stillbirth and gestational age or fetal maturity completely unrelated. Williams’s study of 105 cases of expectant and other therapies for placenta previa, fetal and neonatal total mortality was 28%