At least 150 subjects with osteoarthritic knee will be recruited and computer randomized 1:1:1:1 to single injection of ASA (40mg), ASA (20mg), PRP + HA, and NS groups. Both subjects and evaluaters were blinded to allocations. Functional and radiologic outcomes were measured at baseline, and 1 week, 1, 3, 6, 12 months postinjection.
A double-blind, randomized controlled trial designed to evaluate the symptomatic modulating efficacy of amniotic suspension allograft (ASA) in comparison to platelet-rich plasma (PRP), hyaluronic acid (HA) and normal saline (NS) in the injection treatment of knee osteoarthritis. The hypothesis is that ASA would provide the greatest functional improvement.