Gastric pressure during emergency caesarean section under general anaesthesia |
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Authors: | Hartsilver E L; Vanner R G; Bewley J; Clayton T |
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Institution: | Gloucestershire Royal Hospital, Great Western Road, Gloucester GLI 3NN, UK |
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Abstract: | Gastric pressure and volume were measured in 20 pregnant women during
emergency Caesarean section under general anaesthesia with neuromuscular
block. Mean gastric pressure was 11 (range 4-19) mm Hg and we can predict
that 99% of women undergoing emergency Caesarean section with neuromuscular
block are likely to have gastric pressures of less than 25 mm Hg (mean + 3
SD). This has implications for the amount of cricoid pressure required
during induction of anaesthesia. Gastric pressure increased during delivery
to 19 mm Hg and fundal pressure caused a gastric pressure of 65 mm Hg in
one woman. Gastric pressure decreased significantly after delivery (P <
0.001) to 8 mm Hg. Although we measured large gastric volumes (mean 112
(range 20-350) ml), there was no correlation between gastric volume and
gastric pressure.
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