1、In this artile, it introduced the main characteristics of the S/D.
2、In this artile, it introduced the main characteristics of synchronizer and analyzer, the R/D and S/D converting circuit used cmos chip RD14531.
3、Study of Relationship between Fetal Biophysical Score and Umbilical Artery Blood S/D Value and Fetal Prognosis in Preeclampisa;
4、分析各組中S/D值與胎兒窘迫的相關*；
5、The stillbirth group(delete those with placental abruption)was significantly higher in umbilical cord blood S/D value and lower blood pressure(P0.01).
6、目的探討臍動脈收縮期血流峯值（S）與舒張末期血流速度（D）的比值（S/D）對預測胎兒宮內缺氧的臨牀價值。
7、The group of severe preeclampsia SRA PI, RI and S/D values than the control group and the mild and moderate PIH group were significantly higher, the difference was significant(P
8、死胎組（刪除胎盤早剝者）臍動脈S/D值高於對照組，血壓低於對照組（P值均〈0.01）。
9、ObjectiveTo evaluate the efficiency of heparin on the ratio of peak systolic to least diastolic flow velocity (S/D) of umbilical artery flow velocity waveforms at second-trimester pregnancies.
10、目的總結胎兒臍血流S/D值異常在胎兒宮內發育遲緩、妊高徵、臍帶纏繞、膽汁瘀積症等病理情況時胎兒及新生兒的結局。
11、方法正常組與病變組對比觀察二維聲像圖表現、血流信號的多少、血流速度、RI、S/D比值，並進行統計學處理。
12、方法應用多普勒超聲技術檢測112例胎兒的臍動脈、大腦中動脈、腎動脈血流的S/D值、RI值，其中正常妊娠64例，妊高徵48例。
13、⑶重度子癇前期組SRAPI、RI和S/D值較對照組及輕度妊高徵組、輕度子癇前期組均明顯升高，具有顯著*差異（P〈0.01）。
