These are platelets from several units of total blood.
By centrifuging a unit of total blood, the leucoplatelet layer is separated and obtained in a bag. This product is centrifuged again to concentrate the platelets, which are then filtered to eliminate most of the leucocytes. Finally, several (generally five) of these units are mixed and a solution is added (0.29% sodium citrate 2 H2O, 0.40% sodium acetate 3 H2O and 0.67% sodium chloride) to enhance the preservation of the platelets.
Volume: the average volume is 305.2 ± 35.3 ml.
Platelet content : more than 2.5 x 1011.
Leucocytes: less than 1 x 106
Ph (after five days' preservation): the average Ph at the end of the preservation period is 6.92 ± 0.17. In all cases it remains between 6.4 and 7.2.
Collapsible plastic bags.
With labels containing the following data: name of the centre, type of product, ABO group and Rh (D) factor, unit number, date of extraction, expiry date, results of analysis, type of anticoagulant, preservation and administration conditions.
At 22ºC ± 2ºC in continual movement.
The platelet pools can be irradiated.