Table 2.

Comparison of mean gastric reserve volume (ml) and average gastric residual volume (mean/kg body weight) measured by USG and manual aspiration over the study period

Gastric reserve volume (ml)	USG	Manual aspiration	P-value
Day 1 (n=57)			<0.001
Morning	31.98±24.32	20.65±18.28
Evening	24.54±18.79	16.89±14.55
Average	0.47±0.30	0.30±0.24
Day 2 (57)			<0.001
Morning	27.72±22.13	20.93±23.21
Evening	26.39±31.07	18.33±27.46
Average	0.44±0.38	0.31±0.37
Day 3 (n=57)			<0.001
Morning	24.99±21.06	17.44±25.95
Evening	25.09±16.51	16.88±23.99
Average	0.41±0.29	0.27±0.36
Day 4 (n=57)			<0.001
Morning	29.81±32.88	15.88±23.58
Evening	23.94±24.65	11.32±15.66
Average	0.45±0.47	0.22±0.32
Day 5 (n=56)			<0.001
Morning	21.45±20.18	11.11±17.42
Evening	15.52±15.04	9.11±14.37
Average	0.30±0.27	0.18±0.32
Day 6 (n=26)			0.002
Morning	21.30±39.77	12.65±29.05
Evening	13.27±10.85	8.04±12.97
Average	0.28±0.33	0.16±0.28
Day 7 (n=11)			0.017
Morning	13.99±8.78	11.55±6.73
Evening	12.97±7.05	7.78±5.65
Average	0.20±0.08	0.14±0.08
Day 8 (n=3)			0.669
Morning	8.69±1.31	11.67±2.89
Evening	8.36±2.24	8.33±7.64
Average	0.14±0.02	0.16±0.08
Day 9 (n=2)			0.251
Morning	7.85±6.29	0±0
Evening	10.15±12.80	2.50±3.54
Average	0.14±0.04	0.02±0.03
Day 10 (n=1)			-
Morning	50.4±0	90±0
Evening	55.2±0	60±0
Average	0.81±0	1.15±0

Values are presented as mean±standard deviation.

USG: ultrasonography.