Comparison of the proportion of positive test results in the S-test and V-test for each NS dose
The proportions of positive results (as per rater 1) in the S-test and V-test for each of the three doses were statistically significant in all dose groups (0.1 mL/kg, 0.3 mL/kg, 0.5 mL/kg; all Changes in the proportion of positive test results in the S-test and V-test for different doses of normal saline. The proportions of positive test results were significantly higher in the V-test than in the S-test across all doses of normal saline. S-test, precordial Doppler sound test; V-test, blood flow velocity test.