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[Fetal lung maturity and fetal flowmetry changes].

J Piazze1, M Anceschi, F Amici

  • 1II istituto di Clinica Ostetrica e Ginecologica Policlinico Umberto I Università degli Studi La Sapienza di Roma. jjpiazze2000@hotmail.com

Acta Bio-Medica De L'Ateneo Parmense : Organo Della Societa Di Medicina E Scienze Naturali Di Parma
|June 27, 2001
PubMed
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Altered Doppler flow velocimetry waveforms in high-risk pregnancies indicate a delay in fetal lung maturity (FLM), especially after 33 weeks gestation. This suggests fetuses with abnormal UA/MCA ratios may not be protected from neonatal respiratory distress syndrome.

Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Neonatology

Context:

  • High-risk pregnancies require careful monitoring for fetal well-being.
  • Doppler flow velocimetry (FVW) is a key tool for assessing fetal circulation.
  • Amniotic fluid (AF) analysis provides insights into fetal lung maturity (FLM).

Purpose:

  • To investigate the association between altered Doppler FVW and biochemical/biophysical changes in AF lung surfactant in high-risk pregnancies.
  • To determine if specific FVW patterns correlate with indicators of pulmonary maturity.

Summary:

  • This study analyzed 108 high-risk pregnancies, focusing on 22 with altered FVW (Umbilical Artery Pulsatility Index and UA PI/Middle Cerebral Artery Pulsatility Index ratio).
  • Amniotic fluid was assessed for lecithin/sphingomyelin ratio (L/S), phosphatidylglycerol (PG), and lamellar bodies (LBs).

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  • Significant negative correlations were found between UA/MCA ratio and L/S and PG, particularly in pregnancies over 33 weeks gestation.

    • Impact:

    • Findings challenge the assumption that abnormal UA/MCA ratios protect against neonatal respiratory distress syndrome (RDS).
    • Suggests a delay in fetal lung maturation in fetuses with altered FVW, particularly in later gestation.
    • Highlights the importance of considering FVW in conjunction with FLM assessment for comprehensive risk evaluation.