Preparation method of platelet-rich plasma

The invention belongs to the technical field of clinical medicine, and particularly relates to a preparation method of platelet-rich plasma. The method comprises the following steps: S1, putting peripheral venous blood into a separation gel blood collection tube containing an anticoagulant, and uniformly mixing; s2, centrifuging for the first time, and centrifuging for 9-11 minutes at the centrifugal force of 300g; s3, centrifuging for the second time, centrifuging for 9-11 minutes at the centrifugal force of 1200g, and dividing the centrifuged plasma into three layers: the lowermost layer is erythrocyte below the separation gel, the uppermost layer is serum (platelet-poor plasma), and the layer between the two layers, namely between the platelet-poor plasma and the separation gel (turbid color), is a platelet-rich plasma layer; extracting serum on the upper layer of the discarded centrifugal tube, and extracting platelet-rich plasma on the upper layer of the separation gel to obtain a finished product. The P