Platelet-rich plasma does not reduce blood loss or pain or improve range of motion after TKA.
Diiorio TM, Burkholder JD, Good RP, Parvizi J, Sharkey PF. Platelet-rich plasma does not reduce blood loss or pain or improve range of motion after TKA. Clin Orthop Relat Res. 2012 Jan; 470(1):138-43.