I was able to dig up an article from a long time ago: methods for determining the internal volumes of CVCs by Lawson and Vertenstein from Journal of Intravenous Nursing Volume 16, no. 3, May/June 1993.
I looked at the PICC placement for one of our patients
4French DL PowerPICC from BARD
34 cm cut
55 cm uncut
Uncut priming volume of red = 0.51 mL
Uncut priming volume of white = 0.38 mL
34 cm/55 cm=0.618 x 0.61 (red 0.51 mL + 0.1 for hub) = 0.38 mL for RED
Did I do the math correctly? Would the volume of most hubs be 0.1 mL?