Table 3: Methods of determination of SVC diameter, flow velocity, and reported mean (SD) values in mL/kg/min.

SVC diameter SVC flow velocity Angle correction Time after birth SVC flow (mL/kg/min) Preterm infants Term infants Mean SD Mean SD Tamura et al., 1998 [31] Not done 1 cm proximal of RA 2D guided PW doppler suprasternal view no 24 hours 17 Kluckow and Evans, 2000 [8] 2D internal minimum and maximum diameter high parasternal view RA-SVC junction 2D guided PW doppler subcostal view no 24 hours 25 82 40 13 76 38 Groves et al., 2008 [32] M mode internal minimum and maximum diameter high parasternal view RA-SVC junction 2D guided PW doppler subcostal view no 24 hours 14 112 36 13 89 32 Lee et al., 2010 [33] 2D internal minimum and maximum diameter high parasternal view RA-SVC junction 2D guided PW doppler subcostal view no 24 hours 48 99 47 Sloot et al., 2010 [25] 2D internal minimum and maximum diameter high parasternal view RA-SVC junction 2D guided PW doppler subcostal view no 7 days 57 89 33