Fig. 1.

(A) Taking a whole blood sample and centrifuging at 3000 RPM for 15 min. (B) The blood was separated into three layers. (C) The platelet-poor serum layer was collected and pipette into sterilized injection bottles. (D) The injection bottle was attached to a dental syringe and heated at 100℃ for 12 minutes. The collected serum finally turned to plasma gel. (E) The plasma gel was a semi-solid and easily injectable material that was stable at the injection site. (F) The plasma gel was maintained over 1 year in the sterilized injection bottle, but exposed to room air, the plasma gel disappeared within 1 month. (G) Electron microscope findings of plasma gel: the plasma gel showed the typical shape of protein structures on an electron microscope.