Blood Smear Facts - 4
 Spontaneous Platelet aggregation (SPA) :
What corrections need to be made if sodium citrate tube used for cell counts:
Results must be corrected for dilution factor:
Dilution = volume of diluent + volume of blood
                          volume of blood
The ratio of sodium citrate to blood is 9:1
=1.1
Dilution = 1 + 9
                   9
So results must be multiplied by 1.1 to correct for dilution factor.