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Overview
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Physiological changes in pregnancy: A→ venous engorgement, edema, ↑ by PIH, URTI and fluid overload, easy nasal bleed B→ ↓FRC, TLC, ERV, ↑ IRV, TV, minute vent, and O2 consumption, ↑ shunt from 5% to 14 %, shift of O2-Hgb curve to the Rt with P50 30mmHg C→ ↑ CO, Normal BP due ↓ SVR, ↑ plasma volume