Doppler ultrasonography of the umbilical cord in normal pregnancy
| Autor: | Levy Dw, Bruner Jp, Gabbe Sg, Arger Ph |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Adult
medicine.medical_specialty Adolescent Systole Gestational Age Normal values Normal pregnancy Umbilical cord Ultrasonography Prenatal Umbilical Arteries symbols.namesake Diastole Pregnancy Reference Values medicine.artery Internal medicine medicine Humans business.industry Umbilical artery General Medicine Blood flow medicine.anatomical_structure Cardiology symbols Female Ultrasonography business Perfusion Doppler effect Blood Flow Velocity |
| Zdroj: | Southern medical journal. 86(1) |
| ISSN: | 0038-4348 |
| Popis: | Using continuous wave Doppler ultrasonography to measure umbilical artery flow velocity waveforms (FVWs) is a safe, noninvasive means of quantifying placental resistance to blood flow. Detection of abnormally elevated resistance to umbilical perfusion may identify pregnancies complicated by uteroplacental insufficiency. Use of this technique to identify high-risk pregnancies requires ready access to standard tables of normal FVW values obtained from well-defined populations under usual clinical conditions. We report measurements of the systolic-diastolic (S-D) ratio of the umbilical artery obtained between 16 and 43 weeks in 122 normal pregnancies. A gestational-age-adjusted table of normal values is presented. |
| Databáze: | OpenAIRE |
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