Abstract
The aggregability of human platelet-rich plasma (PRP) prepared from blood drawn by silicone-coated, citrated Vacutainer tubes is compared with that from blood drawn by plastic syringes and placed in citrate-containing polypropylene tubes. PRP prepared from the Vacutainer tubes showed a poorer aggregation response to adenosine diphosphate (ADP), epinephrine or collagen than that prepared from polypropylene tubes. On the other hand, five of nine Vacutainer blood samples showed “Spontaneous” platelet aggregation (SPA), while none of the samples in polypropylene tubes showed SPA. Apparently, the presence or absence of SPA in PRP can be affected by the blood sample collection method.
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