Table 1:

Values of blood flow Doppler parameters with their tolerance interval limits given for MCA, ACA, and tICA obtained in 56 children with SCD

Parameters	MCA		ACA		tICA
	Left	Right	Left	Right	Left	Right
VPS
Mean (cm/s)	179 ± 27b	185 ± 28b	143 ± 34b	152 ± 30b	164 ± 27	169 ± 24
Tolerance interval (cm/s)	117–240	120–250	66–220	84–220	103–225	114–225
% of the Mean	65–134	65–135	46–154	55–145	63–137	67–133
VMN
Mean (cm/s)	131 ± 21	133 ± 20	106 ± 25b	111 ± 22b	120 ± 21	123 ± 19
Tolerance interval (cm/s)	83–179	88–178	49–163	60–161	61–175	78–167
% of the Mean	63–137	66–134	46–154	54–145	51–146	63–136
VED
Mean (cm/s)	92 ± 18	90 ± 17	72 ± 18	74 ± 16	83 ± 16	83 ± 16
Tolerance interval (cm/s)	50–133	52–128	31–113	37–112	47–119	47–120
% of the Mean	54–145	58–142	44–157	50–151	57–143	56–143
PI
Median (range)	0.64c–0.80	0.74c–0.87	0.65c–0.62	0.71c–0.86	0.66c–0.98	0.72c–0.96
Tolerance interval	0.41–1.21	0.44–1.31	0.38–1.00	0.45–1.31	0.43–1.20	0.44–1.40
% of the Mean	61–179	61–181	55–145	63–181	62–174	62–197

^aLimits of tolerance intervals for each Doppler parameter are also provided as a percentage of the mean to better disclose the magnitude of limits.

^bStatistically significant between-sides difference where the P value is <.05 (t test).

^cStatistically significant between-sides difference where the P value is <.05 (Wilcoxon test).