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

SVC diameterSVC flow velocityAngle correctionTime after birthSVC flow (mL/kg/min)
Preterm infantsTerm infants
MeanSD MeanSD

Tamura et al., 1998 [31]Not done1 cm proximal of RA 2D guided PW doppler suprasternal viewno24 hours17

Kluckow and Evans, 2000 [8]2D internal minimum and maximum diameter high parasternal viewRA-SVC junction 2D guided PW doppler subcostal viewno24 hours258240137638

Groves et al., 2008 [32]M mode internal minimum and maximum diameter high parasternal viewRA-SVC junction 2D guided PW doppler subcostal viewno24 hours1411236138932

Lee et al., 2010 [33]2D internal minimum and maximum diameter high parasternal viewRA-SVC junction 2D guided PW doppler subcostal viewno24 hours489947

Sloot et al., 2010 [25]2D internal minimum and maximum diameter high parasternal viewRA-SVC junction 2D guided PW doppler subcostal viewno7 days578933