| 艾红,鱼博浪,尹益民,任晓萍,潘文倩,苏继莲.中晚孕期正常胎儿静脉导管血流参考范围[J].中国医学影像技术,2007,23(9):1366~1368 |
| 中晚孕期正常胎儿静脉导管血流参考范围 |
| Reference ranges of ductus venous blood flow in normal fetuses during second and third trimester |
| 投稿时间：2007-04-10 修订日期：2007-06-21 |
| DOI： |
| 中文关键词: 胎儿静脉循环 静脉导管 超声检查,多普勒 |
| 英文关键词:Fetal venous circulation Ductus venosus Ultrasonography, Doppler |
| 基金项目: |
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| 中文摘要: |
| 目的 建立中晚孕期正常胎儿静脉导管心动周期不同时相血流速和各计算参数参考范围。方法 应用彩色多普勒超声横断面检查138例16~41孕周正常单胎胎儿静脉导管血流波形测定血流参数:①心室收缩期峰值流速(S-peak);②心室舒张期峰值流速(D-peak);③心房收缩期最大流速(A)-wave;④平均流速(Vmean);⑤S/A值,S/D值,(S-A)/S值,(S-A)/D值,(S-A)/Vmean比值。结果 正常胎儿静脉导管的血流血流速: S-peak(43~75 cm/s), D-peak (39~69 cm/s), A-wave(25~48 cm/s),Vmean(37~63 cm/s)随着孕龄增加而增加均有显著性差异(P<0.01,P<0.05, P<0.01, P<0.01);而S/A比值(1.85~1.57),(S-A)/S比值(0.45~0.35),(S-A)/Vmean值(0.54~0.43),(S-A)/D值(0.51~0.39)随着孕龄增加而减低(P<0.01,P<0.01,P<0.05, P<0.05), S/D与孕龄相关性差(r=0.1,P>0.05)。结论 正常胎儿静脉导管血流速随着孕龄增加而增加; 而阻力指数随着孕龄增加而减低,S/D值在妊娠中持续不变。 |
| 英文摘要: |
| Objective To establish reference ranges with gestation for blood flow velocity during the difference phases of the cardiac cycle and various calculated indice for fetal ductus venosus. Methods Color Doppler flow ultrasound was used in this prospective cross-sectional study to examine 138 normal singleton pregnancies at 16-41 weeks gestation. Flow velocity waveforms were recorded from the ductus venosus. Peak velocity during ventricular systole (S-peak), Peak velocity during ventricular diastole (D-peak), lowest velocity during atrial contraction (A-wave) and mean velocity (Vmean) were measured at DV inlet and S/A ratio, S/D ratio, (S-A)/S ratio, (S-A)/D ratio and (S-A)/Vmean ratio were calculated. Results The blood velocity of DV: S-peak (43-75 cm/s), D-peak (39-69 cm/s), A-wave (25-48 cm/s),Vmean (37-63 cm/s) increased with advancing gestational age (P<0.01,P<0.05, P<0.01, P<0.01). S/A (1.85-1.57) ratio, (S-A)/S (0.45-0.35) ratio, (S-A)/Vmean (0.54-0.43) ratio and (S-A)/D (0.51-0.39) ratio decreased with advancing gestational age (P<0.01,P<0.01,P<0.05, P<0.05). S/D ratio showed poor correlation with gestational age (r=0.1, P>0.05). Conclusion The blood flow velocity of DV increased with advancing gestational age; while indices of pulsatility for flow in the ductus venosus decreased with advancing gestational age. S/D ratio remains constant throughout gestation. |
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