Table 2

Normal Physiological Respiratory Changes During Pregnancy

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


Adapted from Weinberger et al [17].

Pali-Schöll et al. World Allergy Organization Journal 2009 2:26-36   doi:10.1186/1939-4551-2-3-26

Open Data