Table 1:

Velocity and flow analysis in internal jugular vein and vertebral vein in supine and standing positions

	Velocity, cm/s^a		Flow, mL/min^a
	Supine Position	Standing Position	Supine Position	Standing Position
IJV right	20.58 ± 12.6	27.33 ± 21.24	357.03 ± 230.6	108.5 ± 117.0
IJV left	12.71 ± 9.23	29.32 ± 20.35	309.06 ± 233.31	126.97 ± 135.25
Total	16.65 ± 11.63	28.33 ± 20.61	666.10 ± 270.45^b	235.49 ± 202.35^b
VV right	9.60 ± 7.00	19.76 ± 12.34	41.25 ± 150.03	21.81 ± 24.02
VV left	7.45 ± 5.64	20.17 ± 16.61	32.45 ± 136.65	20.94 ± 26.45
Total	9.60 ± 7.01	19.64 ± 12.86	73.70 ± 197.31	42.75 ± 38.13
IJV + VV total	12.58 ± 10.19	24.14 ± 17.60	739.80 ± 326.32^b	278.24 ± 207.94^b

↵a Mean ± SD.
↵b P < .01.