Table 2. Description of collected blood... | American Society of Hematology

Table 2.

Description of collected blood products by city and season

		Apheresis volume (mL)	Apheresis yield (plt × 10¹¹)	WB volume (mL)	WB total WBC (10⁹)	Prefiltration RBC volume (mL)	Postfiltration RBC volume (mL)	Filtered PRP volume (mL)	Filtered PRP yield (Plt × 10¹⁰)
D-Spring99	Mean	321	5.2	428	2.5	235	217	217	8.0
	SD	56	0.9	18	0.3	32	28	34	2.3
	Min	238	3.9	390	2.1	177	173	166	3.9
	Max	429	7.1	450	3.3	294	267	272	10.6
	N	13	13	13	13	12^*	12^*	12^*	11^†
N-Spring99	Mean	286	3.2	489	3.0	300	299	265	7.0
	SD	35	1.2	16	0.7	26	22	11	2.6
	Min	212	1.3	442	2.2	252	247	250	4.2
	Max	334	5.2	503	4.3	331	320	283	11.9
	N	12	12	11^‡	11^‡	11^‡	11^‡	11^‡	11^‡
D-Fall98	Mean	412	7.1	450	ND	272	232	199	ND
	SD	92	0.9	22		29	31	41
	Min	268	5.7	427		225	180	148
	Max	532	8.2	478		299	259	249
	N	6	6.0	6		6	6	6
N-Fall98	Mean	280	3.2	519	3.3	320	336	232	7.3
	SD	44	1.5	28	0.7	50	41	30	3.0
	Min	224	0.7	441	2.3	226	244	171	3.5
	Max	368	6.4	544	4.4	399	405	279	14.9
	N	12	12	12	12	12	12	12	12
N-Spring98	Mean	290	3.5	521	2.9	355	358	213	6.7
	SD	55	0.8	16	0.8	41	44	41	1.8
	Min	234	2.3	492	2.0	299	305	140	3.9
	Max	401	4.8	545	4.3	439	449	278	9.7
	N	9	9	δ 8	δ 8	δ 8	δ 8	δ 8	δ 8

		Apheresis volume (mL)	Apheresis yield (plt × 10¹¹)	WB volume (mL)	WB total WBC (10⁹)	Prefiltration RBC volume (mL)	Postfiltration RBC volume (mL)	Filtered PRP volume (mL)	Filtered PRP yield (Plt × 10¹⁰)
D-Spring99	Mean	321	5.2	428	2.5	235	217	217	8.0
	SD	56	0.9	18	0.3	32	28	34	2.3
	Min	238	3.9	390	2.1	177	173	166	3.9
	Max	429	7.1	450	3.3	294	267	272	10.6
	N	13	13	13	13	12^*	12^*	12^*	11^†
N-Spring99	Mean	286	3.2	489	3.0	300	299	265	7.0
	SD	35	1.2	16	0.7	26	22	11	2.6
	Min	212	1.3	442	2.2	252	247	250	4.2
	Max	334	5.2	503	4.3	331	320	283	11.9
	N	12	12	11^‡	11^‡	11^‡	11^‡	11^‡	11^‡
D-Fall98	Mean	412	7.1	450	ND	272	232	199	ND
	SD	92	0.9	22		29	31	41
	Min	268	5.7	427		225	180	148
	Max	532	8.2	478		299	259	249
	N	6	6.0	6		6	6	6
N-Fall98	Mean	280	3.2	519	3.3	320	336	232	7.3
	SD	44	1.5	28	0.7	50	41	30	3.0
	Min	224	0.7	441	2.3	226	244	171	3.5
	Max	368	6.4	544	4.4	399	405	279	14.9
	N	12	12	12	12	12	12	12	12
N-Spring98	Mean	290	3.5	521	2.9	355	358	213	6.7
	SD	55	0.8	16	0.8	41	44	41	1.8
	Min	234	2.3	492	2.0	299	305	140	3.9
	Max	401	4.8	545	4.3	439	449	278	9.7
	N	9	9	δ 8	δ 8	δ 8	δ 8	δ 8	δ 8

WB indicates whole blood; RBC, red blood cell; PRP, platelet-rich plasma; Plt, platelet; ND, not determined.

n = 1 not counted.

n = 2 not counted.

n = 1 subject dropped from WB arm.