What question did this study set out to answer?

To determine whether maternal indomethacin therapy alters fetal pulmonary arterial vascular impedance in the absence or presence of ductus arteriosus constriction.

February 1, 1999Ultrasound in Obstetrics and Gynecology

The effects of maternal indomethacin therapy on human fetal branch pulmonary arterial vascular impedance

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Authors

JRJuha RäsänenUniversity of Helsinki RDRobert H. DebbsThomas Jefferson University DWDennis WoodLawrence Livermore National Laboratory

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Implication

Cross-sectional study finds elevated pulmonary vascular impedance in fetuses during maternal indomethacin therapy, indicating resistance increases even without ductal constriction.

Key Points

To determine whether maternal indomethacin therapy alters fetal pulmonary arterial vascular impedance in the absence or presence of ductus arteriosus constriction.
Conducted a cross-sectional study using Doppler echocardiography in fetuses between 24 and 34 weeks of gestation across three cohorts: untreated controls (n = 52), indomethacin-exposed fetuses without ductal constriction (Study group I, n = 33), and indomethacin-exposed fetuses with ductal constriction (Study group II, n = 11).
Recorded blood velocity waveforms across the proximal right or left branch pulmonary artery to calculate the pulsatility index (PI).
Normal control fetuses showed a gestational decrease in proximal pulmonary artery PI from 3.73 ± 0.33 at 24–25 weeks (n = 7) to 2.98 ± 0.27 at 33–34 weeks (n = 11; p < 0.0001).
Fetuses exposed to indomethacin without ductal constriction exhibited significantly higher PI than controls across gestation (p < 0.005), although the weekly rate of PI decline remained comparable.
Fetuses with ductal constriction had marked PI elevations after 26 weeks compared to controls: 4.12 vs. 3.34 at 27 weeks (p < 0.005), 4.48 vs. 3.14 at 30 weeks (p < 0.0001), and 4.96 vs. 3.00 at 34 weeks (p < 0.0001).

Cite This Study

Räsänen et al. (1999) studied this question.

synapsesocial.com/papers/6a9bd3c5eebeb8a10b8fee33 https://doi.org/10.1046/j.1469-0705.1999.13020112.x

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Implication

Cross-sectional study finds elevated pulmonary vascular impedance in fetuses during maternal indomethacin therapy, indicating resistance increases even without ductal constriction.

The effects of maternal indomethacin therapy on human fetal branch pulmonary arterial vascular impedance

Discussion

Member takes

Implication

Key Points

Cite This Study

The effects of maternal indomethacin therapy on human fetal branch pulmonary arterial vascular impedance

Discussion

Member takes

Implication

Key Points

Cite This Study

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