Abstract
182 full double donations were collected, using 7–9 cycles with an in-house guideline based on donor HCT, and platelet count. 95.6% of donations were within specifications for platelet yield and 100% were leucodepleted. To overcome the potential for red cell spill-over when the platelet peak is too small, automated continuous monitoring of machine performance has been introduced reducing the potential for spill-over. To understand the impact of the continuous exposure of platelets to the filter, the quality of the first and second part of the collection was monitored using a new set of markers for the platelet storage lesion (activation, microvesiculation, cellular injury, complement and response to ADP). The results were equivalent and compared well with routine practice. Our new protocol allows a wide range of donors to be selected and the highest percentage of products to meet the UK specification with consistency. It is recommended that it can be used for double dose platelets with routine SPM.
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