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Related Experiment Video

Updated: Dec 31, 2025

Author Spotlight: Point-of-Care Ultrasound for Gastric Content Assessment and Risk Stratification in Perioperative Care
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Does Point-of-Care Gastric Ultrasound Correlate With Reported Fasting Time?

Andrew F Miller1, Jason A Levy1, Baruch S Krauss1

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|January 9, 2020
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Summary

Point-of-care ultrasound (POCUS) can estimate gastric volume in children but shows a weak correlation with reported fasting times. This suggests fasting duration alone may not accurately predict aspiration risk in pediatric emergency settings.

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Area of Science:

  • Pediatric Emergency Medicine
  • Anesthesiology
  • Point-of-Care Ultrasound

Background:

  • Patient-reported fasting time is traditionally used to assess aspiration risk before procedures.
  • Gastric ultrasound is emerging as a tool to evaluate gastric volume and aspiration risk in operative settings.
  • The correlation between gastric ultrasound measurements and fasting times in pediatric emergency patients is not well-established.

Purpose of the Study:

  • To determine the correlation between gastric volume estimated by point-of-care ultrasound (POCUS) and reported fasting time in children with acute traumatic injuries.
  • To evaluate the utility of POCUS in assessing gastric volume for aspiration risk in pediatric emergency patients.

Main Methods:

  • Children aged 4-18 years with acute traumatic injuries were enrolled.
  • Gastric volume was calculated using a validated formula based on cross-sectional area (CSA) measured via POCUS.
  • Spearman rank correlation was used to analyze the relationship between fasting time and gastric volume.

Main Results:

  • A weak inverse correlation (ρ = -0.33) was observed between fasting time and estimated gastric volume in 103 pediatric patients.
  • Gastric antrum measurements were successful in 85% of patients.
  • No significant difference in correlation was found based on the type of intake (solids or liquids).

Conclusions:

  • Gastric volume can be reliably estimated using POCUS in children in the emergency department.
  • Gastric volume estimated by POCUS is not strongly correlated with reported fasting time in this pediatric population.
  • Fasting time alone may be an unreliable indicator of aspiration risk in pediatric emergency settings.