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New lung functions and pregnancy

G R Baldwin, D S Moorthi, J A Whelton

American Journal of Obstetrics and Gynecology

|February 1, 1977

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Pregnancy does not significantly alter lung function tests like flow volume loops (FVL) and closing volume (CV). However, expiratory reserve volume (ERV) and functional residual capacity (FRC) decrease during pregnancy.

Area of Science:

Pulmonary Medicine
Physiology
Obstetrics

Background:

Pregnancy involves significant physiological changes that can affect respiratory function.
Understanding these changes is crucial for monitoring maternal and fetal health.

Purpose of the Study:

To investigate the impact of pregnancy on various lung function tests.
To compare newer lung function assessments with standard tests during the third trimester and postpartum.

Main Methods:

19 healthy pregnant individuals underwent pulmonary function testing in their third trimester and after delivery.
Tests included standard spirometry (measuring ERV, FRC) and newer methods (FVL, CV).

Main Results:

Flow volume loops (FVL) and closing volume (CV) showed no statistically significant changes during pregnancy.

Related Experiment Videos

Standard pulmonary function tests revealed a significant decrease in expiratory reserve volume (ERV) and functional residual capacity (FRC) during pregnancy.

Conclusions:

Specific lung mechanics like FVL and CV are resilient to changes during pregnancy.
Standard lung function parameters ERV and FRC are reduced in late pregnancy, indicating altered respiratory dynamics.