摘要
用彩色多普勒B型超声仪测得23例正常孕妇及26例IUGR孕妇的脐动脉血流波形之A/B比值。正常妊娠36～40周的A/B平均值在2.5左右,并可制成第90～第10百分位曲线。以此正常曲线诊断IUGR的阳性正确率为85.2%(23/27)。本检查法的优点是,可较早地预告IUGR的缺氧程度。A/B比值<6为轻型胎盘阻力增加的IUGR,示缺氧轻,如无严重畸形,则预后好;A/B>6为重型胎盘阻力增加的IUGR,示缺氧重,其死亡率为77.8%(7/9)。单胎IUGR,若A/B持续>7,死亡率为100%(7/7)。结果提示,A/B比值预测胎儿严重缺氧较胎心监护敏感。
Color Doppler B mode ultrasound instrument was used to obtain blood flow velocity waveform in the umbilical arteries of 23 normal patients from 19th to 40th week of pregnancy and 26 patients with IUGR including 27 small for gestational agefetuses(SGAF). The waveforms were analyzed by calculating the ratio of the peak systolic to end diastolic frequency (A/B ratio). The mean value in 36th-40th week of normal pregnancy was about 2.5. An A/B ratio of over 90th percentile from our derived normal value was formulated. The predictivee value of the A/B ratio in detecting the SGAF was 85.2%. The mortality was 77.8% (7/9)when their A/B ratio was more than 6. Results suggested that the sensitivity of predicting severe fetal distress was higher than that monitoring the fetal heart rate.
出处
《上海第二医科大学学报》
CSCD
1992年第4期285-289,共5页
Acta Universitatis Medicinalis Secondae Shanghai
基金
中央卫生部科技司国家七五攻关课题(75-65-02-17)
关键词
脐动脉血流
宫内生长迟缓
胎儿
umbilical artery blood flow A/B ratio intraulterine growth retardation Doppler frequency spectrum
