Table 1.

Preparation methods of platelet concentrates for transfusion: impacts on protein, platelet, and leucocyte contents per unit

Preparation method	Suspended in		Leuco-reduction	Counts/unit
	Plasma	Additive solution		Platelet	Leukocytes
Whole blood (buffy coat or PRP method)	100%			>2 × 1011	<109
	100%		Yes		<106
	30–40%	60–70%			0.3 × 109
	30–40%	60–70%	Yes		<106
Apheresis	100%				<0.3 × 109
	100%		Yes		<106
	30–40%	60–70%			<0.3 × 109
	30–40%	60–70%	Yes		<106

PRP, platelet-rich plasma.