Lab
Notes - 6
List normal ranges of Hct for each age group:
Newborns =
45 – 60%
1 year old =
27 – 44%
Adult female =
36 – 48%
Adult male =
40 – 55%
Rule of three:
Hb x 3 = Hct " 3
A red ring around the
microhematocrit tube means:
The tube contains
heparin to inhibit clotting of blood
A blue ring around the
microhematocrit tube means:
The tube contains no
anticoagulant