Clinical application of pulsatility index of flow volume to detect the hemodynamic changes in IUGR fetus
| Autor: | Atsuhiko Okagaki, T Mori, Norimasa Sagawa, Chiaki Bano, K. Inamori, Hiroaki Itoh, Yoshiyuki Ihara, M. Hasegawa |
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| Rok vydání: | 1994 |
| Předmět: |
medicine.medical_specialty
Hemodynamics Sensitivity and Specificity Fetal Distress Ultrasonography Prenatal Umbilical Arteries Pregnancy medicine.artery Internal medicine medicine Humans Thoracic aorta Aorta reproductive and urinary physiology Fetus Fetal Growth Retardation business.industry Infant Newborn Models Cardiovascular Obstetrics and Gynecology Umbilical artery Blood flow Cerebral Arteries Endocrinology Fetal circulation Ultrasonography Doppler Pulsed Pulsatile Flow Descending aorta embryonic structures Pediatrics Perinatology and Child Health Middle cerebral artery Cardiology Female Vascular Resistance business Blood Flow Velocity |
| Zdroj: | jpme. 22:243-251 |
| ISSN: | 1619-3997 0300-5577 |
| DOI: | 10.1515/jpme.1994.22.3.243 |
| Popis: | We attempted to assess feto-placental circulation in fetuses with intrauterine growth retardation (IUGR) by calculating the pulsatility index of flow volume (PIQ) based on the quantitative measurement of blood flow. Doppler sound was processed by an analog to digital converter and a frequency analyzer. Multiplication of frequency and signal strength of the Doppler sound at a certain time theoretically represents a value proportional to flow volume. Using this value, we calculated PIQ of the descending aorta, umbilical artery, and middle cerebral artery in normal fetuses, IUGR fetuses, and distressed fetuses during 24-41 weeks gestation. The PIQ of the fetal descending aorta in the IUGR fetus was significantly higher than that of the normal fetus. When cutoff value was set to mean +1 SD, abnormal PIQ was observed in 88% of IUGR fetuses. In contrast, the abnormal pulsatility index of maximal flow velocity (PIV) of the descending aorta was observed in only 62% of IUGR fetuses. In the distressed fetuses, both PIQ and PIV of the umbilical artery increased, and these indices of the middle cerebral artery markedly decreased. It is suggested that the increased PIQ of the descending aorta is an early indicator of changes in the fetal circulation in IUGR fetuses. |
| Databáze: | OpenAIRE |
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