Conventional Rapid Latex Agglutination in Estimation of von Willebrand Factor: Method Revisited and Potential Clinical Applications

Table 5

Rheumatoid factor interference on high and low plasma pools.

Type of the plasma pool	Vol. of RF control serum (μL)^a	Vol. of the plasma pool (μL)	RF conc. in plasma pool (IU/mL)	vWF LAT (titre)
High plasma pool	25	175	129	1 : 64
	30	180	147	1 : 128 (weak)
	40	200	172	1 : 128
Low plasma pool	10	990	10	1 : 2
	10	390	26	1 : 4
	10	190	52	1 : 8
	10	90	103	1 : 16
	10	70	129	1 : 32

 ^aRheumatoid factor control serum from MyBioSource, USA (1030 IU/mL), was used to spike plasma pools.
RF: rheumatoid factor; VWF LAT: von Willebrand factor latex agglutination test; vol., volume; conc., concentration.