Doppler blood flow velocity waveforms in the fetal renal artery
β Scribed by K. Hecher; R. Spernol; S. Szalay
- Publisher
- Springer
- Year
- 1989
- Tongue
- English
- Weight
- 644 KB
- Volume
- 246
- Category
- Article
- ISSN
- 0003-9128
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π SIMILAR VOLUMES
Doppler blood velocity waveforms were analyzed from the umbilical artery as an indication of fetal well-being. Since the ratio of systolic to diastolic peak flows (A/ B) reflects placental vascular resistance, an abnormality of this value may accurately predict compromised fetuses. Twenty-one studie
Pulsed-Doppler examinations of blood-flow velocities in the umbilical ar- tery were carried out before and after 15 diagnostic cordocenteses and 34 fetal blood transfusions into the umbilical vein. There were decreases in the systolic/diastolic ratio (A/B) ( p < 0.01), the pulsatility index (PI) (p
Pulsed Doppler blood-flow velocity waveforms in the umbilical arteries, as well as blood gases, hematocrit, and lactate concentration in umbilical venous blood, were examined in 21 patients undergoing 49 cordocentesis, 34 of which were followed by fetal blood transfusion into the umbilical vein. The
Blood velocity waveforms in peripheral arteries vary such that decreasing vascular resistance results in a relative increase in diastolic velocity a t steady state. We measured blood velocity in renal arteries of 20 children (age: 119 months \* 37 months; weight: 38 kg 2 15 kg) to establish normal