Perlas et al developed an improved equation for estimating gastric volume based on gastric ultrasound measurements. The authors are from the University of Toronto and Toronto Western Hospital.

Assessment: ultrasonography



(1) age of the patient in years

(2) cross-sectional area of the gastric antrum in square cm with the patient in a right lateral decubitus position


predicted gastric volume in mL =

=  (14.6 * (cross sectional area)) - (1.28 * (age)) + 27

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