Table 1. Cell counts on different... | American Society of Hematology

Table 1.

Cell counts on different platelet preparations^*

Preparation	Platelet count per mm³	White blood cell count per mm³	Red blood cell count per mm³	Volume used to make total RNA
PRP-upper	500 000	550	0	6 mL
PRP-middle	398 000	330	0	3 mL
PRP-lower	17 500	18 800	2 950 000	∼3 mL
Gel filtered	235 500	0	0	∼3 mL

Preparation	Platelet count per mm³	White blood cell count per mm³	Red blood cell count per mm³	Volume used to make total RNA
PRP-upper	500 000	550	0	6 mL
PRP-middle	398 000	330	0	3 mL
PRP-lower	17 500	18 800	2 950 000	∼3 mL
Gel filtered	235 500	0	0	∼3 mL

This procedure was repeated on several occasions to confirm the absence of red blood cells in the upper and middle platelet-rich plasma (PRP) fractions.

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