Ultrasound Assessment of Gastric Volume in Parturients After High-Flow Nasal Oxygen Therapy
Authors' conclusion
Treatment with HFNO for 20 minutes at flow rates up to 50 L·min -1 did not increase gastric volume in term pregnant women breathing spontaneously when evaluated by gastric ultrasonography.
Study context
- Population
- Healthy fasted parturients scheduled for elective cesarean delivery
- Participants
- 60 participants
- Exposure
- Gastric volume before vs after 20-min high-flow nasal oxygen (HFNO) at 50 L·min −1
- Outcome
- Change in gastric volume from before to after HFNO therapy (ultrasound)
Methodological detailsobserver-blinded
- Observer-blinded
Main finding
As reported in the abstract
Estimated gastric fluid volume (semirecumbent right lateral position)
Observational data: associations, not effects.
Secondary outcomes
Antral CSA (semirecumbent right lateral position)
Distribution of antral grades
- All grade 0 or 1 antrum, most grade 0; no significant difference before and after HFNO
Safety
- Gastric air distension not shown in any parturient, either at baseline or after HFNO
Original publication
Ultrasound Assessment of Gastric Volume in Parturients After High-Flow Nasal Oxygen Therapy. Anesth Analg. Published 11 January 2023. doi:10.
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