为确保采集成功，必须做好采集前准备、控制处理血液总量（终点量值）、全血流速及抗凝剂比例，并注意预防和及时处理。
The pre-collection preparation, the appropriate control in end-point volume, whole blood flow rate and the mixing proportion of whole blood with anticoagulant(WB:ACD) were required.
一个单位的血液约一品脱左右，人体血液总量在8至10品脱之间。 目前，Arteriocyte公司生产一个单位血液的费用约5000美元。
A unit of blood is around a pint and the human body contains between eight and ten pints of blood in total.
体重超标会增加你患高血压的危险。当你体重增加，用于身体循环的血液总量增加。增加的血压不断地冲击着动脉的墙，造成了心脏的过分紧张。研究表明，如果你超重，减少目前重量的10%，即能帮助降低你的血压。
When you gain weight, the amount of blood circulating through your body increases. This increases the pressure of blood flow against your artery walls, which puts added strain on your heart.
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