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pubmed-article:6221437pubmed:abstractTextPlatelet aggregation responses are influenced by conditions of storage of platelet-rich plasma (PRP). The aim of the present study was to further define the necessity for pH control during storage of PRP for tests of platelet function. Aliquots of citrated PRP were maintained at different pH levels by alteration of the CO2 content of the atmosphere in an incubation chamber. At intervals over 2-2 1/2 hours, plasma beta-thromboglobulin and 14C-serotonin were measured as well as platelet aggregation induced by ADP and collagen. At each time a dose response curve was studied for aliquots stored at each pH level. When two aliquots were maintained at different pH levels in the range 6.85-7.90, there was a significant increase in aggregation at the higher pH, even when the pH difference was as small as 0.2 units. In this range, pH did not influence the rate of deterioration of the aggregation response, but when pH was above 8.0, there was marked deterioration of the response. Increased pH was associated with an increase in plasma levels of beta-thromboglobulin and 14C-serotonin, which was more marked when pH was above 8.0. It appears that increases in pH are harmful to platelets and even small pH changes should be avoided during storage of platelet-rich plasma for tests of platelet function.lld:pubmed
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pubmed-article:6221437pubmed:dateRevised2004-11-17lld:pubmed
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pubmed-article:6221437pubmed:articleTitleStorage of platelets for tests of platelet function: effects of pH on platelet aggregation and liberation of beta-thromboglobulin.lld:pubmed
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