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Anaesthesia for caesarean section.

Pregnant women are at risk of hypoxia. They are more difficult to oxygenate than non-pregnant patients due to changes in their respiratory mechanics and they use the oxygen more quickly because of a higher metabolic rate. This situation can be made worse by other factors. Obesity makes control of the airway more difficult and interstitial fluid retention may make the larynx harder to visualise for successful intubation.