Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1763016 | Ultrasound in Medicine & Biology | 2007 | 6 Pages |
Abstract
The objective was to investigate the relationship between fetal aortic distension waveforms and fetal hypoxemia and/or acidosis. Aortic distension waveforms were recorded using an echo-tracking system in nine late-gestation catheterized fetal lambs. Under hypoxic conditions induced by inhalation of gas mixture, fetal blood pressure and aortic distension waveforms were recorded. Four parameters, namely peak systolic and end diastolic diameter, amplitude (ÎD) and ratio of ÎD to end diastolic diameter (%ÎD), were obtained, and correlations between these parameters and partial arterial oxygen tension (PaO2) and pH of fetal blood gas were analyzed. These four parameters were compared between the control, hypoxemic and asphyxic groups. The ÎD and %ÎD were significantly correlated with PaO2 and pH using linear regression analysis. Both the ÎD and %ÎD decreased significantly, in a stepwise fashion, in the hypoxemic and asphyxiated groups compared with controls using repeated measured analysis of variance. It was concluded that fetal aortic distension waveforms proved to be a useful tool to detect the deterioration in the fetal circulation secondary to intrauterine hypoxemia/asphyxia. (E-mail: satohs@oitakenbyo.jp)
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Acoustics and Ultrasonics
Authors
Shoji Satoh, Yasuyuki Fujita, Yasuo Yumoto, Naoko Kinukawa, Hitoo Nakano,