Evaluation of Gastric Emptying Time of a Rice-Based Meal Using Serial Sonography

Table 2

Number of volunteers with empty stomach, cross-sectional area (CSA) of the gastric antrum, and hunger scale score at each evaluation time point.

	Baseline (after 10 h fasting)	Time after meal intake (h)
		2 h	3 h	4 h	5 h	6 h	7 h
Number of volunteers (n)^a	9 (100%)	9 (100%)	9 (100%)	9 (100%)	9 (100%)	5 (56%)	2 (22%)
Number of volunteers with an empty stomach (n)^b	9 (100%)	0	0	0	4 (44%)	7 (78%)	9 (100%)
CSA by formula (cm^2)^c	5.0 ± 1.5	11.6 ± 3.7	11.5 ± 2.7	10.2 ± 2.4	7.2 ± 2.9	5.5 ± 1.5	6.1 ± 4.6
CSA by automatic tracing (cm^2)^d	5.2 ± 1.4	12.0 ± 3.7	11.8 ± 2.7	10.6 ± 2.3	7.3 ± 3.0	5.6 ± 1.5	6.5 ± 4.7
Hunger score (1–10)^e	3.6 ± 0.8	5.5 ± 0.5	5.1 ± 0.6	4.4 ± 0.5	4.2 ± 0.8	3.5 ± 0.8	3.3 ± 0.6

^aThe number of volunteers who received gastric sonographic assessment at each time point is presented as number (%). ^bThe cumulative number of volunteers with empty stomach based on gastric sonography at each time point is presented as number (%). ^cThis CSA was calculated using the formula of the area of an ellipse. ^dThis CSA was calculated using the automatic tracing tool of sonographic machine. ^eThe lower the score, the worse the hunger.