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Related Experiment Videos

Peak expiratory flow rate in normal pregnancy

L R Brancazio1, S A Laifer, T Schwartz

  • 1Department of Obstetrics and Gynecology, Robert C. Byrd Health Sciences Center of West Virginia University, Morgantown, USA.

Obstetrics and Gynecology
|March 1, 1997
PubMed
Summary

Peak expiratory flow rate (PEFR) remains stable throughout pregnancy and postpartum. This finding validates using PEFR testing for pregnant women, including those with asthma.

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Area of Science:

  • Pulmonary Function Testing
  • Obstetrics and Gynecology
  • Respiratory Medicine

Background:

  • Peak expiratory flow rate (PEFR) is a key measure of airflow.
  • Changes in physiological parameters during pregnancy can affect respiratory function.
  • Reliable assessment of respiratory function is crucial for managing conditions like asthma in pregnant individuals.

Purpose of the Study:

  • To investigate potential changes in peak expiratory flow rate (PEFR) during pregnancy.
  • To assess the impact of advancing gestation on PEFR measurements.
  • To determine the validity of PEFR testing in pregnant women.

Main Methods:

  • PEFR was measured in 57 women across three trimesters and postpartum.
  • Measurements involved forceful exhalations into a peak flow meter.

Related Experiment Videos

  • Normalized PEFR values (adjusted for height and age) were compared across study periods using analysis of variance.

    • Main Results:

    • No statistically significant changes in PEFR were observed during pregnancy or postpartum (P = .317).
    • Mean normalized PEFR values remained consistent, ranging from 0.92 to 0.95.
    • Individual PEFR values also showed minimal variation across the different stages.

    Conclusions:

    • Peak expiratory flow rate is not significantly altered by pregnancy or advancing gestation.
    • PEFR testing is a valid and reliable tool for assessing respiratory function in pregnant women.
    • Physicians can confidently utilize PEFR for managing pregnant patients, particularly those with asthma.