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Table 2 Normal Physiological Respiratory Changes During Pregnancy

From: Asthma and Allergic Diseases in Pregnancy: A Review

Increased

Decreased

Tidal volume

Functional residual capacity

Minute ventilation

Residual volume

Alveolar-arterial O2 gradient

Diffusion capacity

Oxygen partial pressure

PaCO2

pH, normal or slightly elevated (respiratory alkalosis)

 

Respiratory rate unchanged

 
  1. Adapted from Weinberger et al [17].
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World Allergy Organization Journal

ISSN: 1939-4551

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