Abstract
Platelet concentrates were prepared from blood stored 18-20 h at either 10 .+-. 2.degree. C or 16 .+-. 2.degree. C. Platelets prepared from blood stored at 10.degree. C had good in vitro properties. The results were not distinguishable from those obtained with freshly isolated platelets. The in vivo effectiveness of platelets prepared in this manner must be established.