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Title
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Term pregnant patients have similar gastric volume to non-pregnant females : a single-centre cohort study
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Author
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Abstract
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| Background: The physiological changes of pregnancy can increase the risk of peri-partum pulmonary aspiration. There is limited objective information regarding gastric volumes in pregnant patients. The aim of this cohort study was to characterise prospectively the range of gastric-fluid volume in term non-labouring pregnant patients compared with a historical cohort of non-pregnant females. Methods: Fasted non-labouring term pregnant patients scheduled for elective Caesarean delivery underwent a standardised gastric ultrasound examination. Gastric content was evaluated qualitatively (type of content), semiquantitatively (Perlas grades), and quantitatively (volume). The antral cross-sectional area and volume were compared with those of a retrospective cohort of non-pregnant females from the same institution. Descriptive statistics were used to describe the central tendency through mean and median values. Dispersion was evaluated with standard deviation and inter-quartile range, and the higher end of the distribution as 95th percentile. Results: Non-labouring pregnant (59) and non-pregnant (81) subjects were studied. The range of estimated total gastricfluid volume (P = 0.96) and volume per body weight (P = 0.78) was not significantly different between cohorts. An estimated volume of 115 ml (102-143) vs 136 ml (106-149) and volume per body weight of 1.4 ml kg(-1) (1.2-2.8) vs 2.0 ml kg(-1) (1.5-2.7) corresponded to the 95th percentile (95% confidence interval) values in the pregnant and non-pregnant cohort, respectively. Conclusions: Baseline gastric volume of non-labouring pregnant patients at term is not significantly different from that of non-pregnant females. This information will be helpful to interpreting findings of gastric point-of-care ultrasound in obstetric patients. |
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Language
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English
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Source (journal)
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British journal of anaesthesia. - Amsterdam
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Publication
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Amsterdam
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Elsevier
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2019
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ISSN
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0007-0912
[print]
1471-6771
[online]
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DOI
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10.1016/J.BJA.2018.07.025
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Volume/pages
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122
:1
(2019)
, p. 79-85
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ISI
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000453927600024
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Pubmed ID
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30579409
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Full text (Publisher's DOI)
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