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11 Cards in this Set
- Front
- Back
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Why might the upper airway be compromised in pregnancy?
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Edema 2/2 the increased EC fluids and vascular engorgement seen in pregnancy.
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In what pregnant patients might airway edema be particularly severe?
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Preeclamptics, patients on tocolytics, or long time in trendelenburg.
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What changes in lung volume can be expected after the 5th month of pregnancy?
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Decrease in the ERV, RV, FRCs. Concomitant increase in IRV such that total lung capacity is unchanged.
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When do FRC and RV return to normal in the pregnant patient?
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shortly after delivery
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How does airway resistance change in pregnancy?
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Generally decreased due to bronchiolar smooth relaxation 2/2 progesterone.
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How is lung compliance affected by pregnancy?
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It remains unchanged.
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How is minute ventilation affected by pregnancy?
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Increases at the beginning of pregnancy to a maximum of 50% above normal at term via a 40% increase in tidal volume and a 15% increase in RR.
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How does tidal volume change in pregnancy?
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increase by 40%
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How does RR change in pregnancy?
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Increase by 15%
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How does dead space change in pregnancy?
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It remains the same.
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How does alveolar ventilation change in pregnancy?
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It increases to 70% by term and returns to normal within 1 to 3 weeks after delivery as progesterone levels decline.
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