To determine the degree of damage occurring during preparation and storage of platelet concentrates, the percent release of B‐thromboglobulin (BTG) and percent leakage of the cytosolic protein lactic dehydrogenase was determined sequentially from phlebotomy to the end of storage for 72 h at 20–24°C. The effect of storage temperature, pH, and radiation was also evaluated. The results showed that during preparation of platelet concentrate a large degree of release was found after resuspension of the platelet button formed after the high‐speed centrifugation. During storage the percent BTG release increased from 18.1 to 40.2% (p<0.05). The percent release seen during storage at 4°C (72 h) was 19.2%, while that seen for platelets subjected to temperature cycling at 4–37 °C was 24.9%. Both of these values were significantly less (p<0.05) than that seen for concentrates stored at room temperature. A negative correlation between pH and BTG release was found (r=‐0.64). Irradiation to 10,000 rad did not induce the release reaction or lactic dehydrogenase leakage. We conclude that the degree of in vitro platelet release is dependent on the preparative manipulations, and gentler protocols for preparation and storage of platelets should be investigated.
Vox Sanguinis – Wiley
Published: Sep 1, 1981
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