• Deyan Li, Yu Wang, and Yi Shen.
• Department of Neurorehabilitation, Anhui Wannan Rehabilitation Hospital, Anhui, China.
• Medicine (Baltimore). 2021 Jan 15; 100 (2): e23881e23881.

BackgroundIn recent years, intra articular injection of platelet rich plasma has attracted increasing attention. The major aim of our current randomized controlled double-blind study was to compare long-term outcomes of intra-articular injection of hyaluronic acid or platelet rich plasma in the treatment of the patients with knee osteoarthritis.MethodsThis is a kind of double-blind, randomized, prospective, and comparative clinical investigation with the allocation ratio of 1:1 and was approved by our institutional review Committee. Between 2020 and 2021, altogether 2 hundred patients will be selected to participate in our present study. We will report the randomized experiments in accordance with the guidelines of Consolidated Standards of Reporting Trials and then offer the Consolidated Standards of Reporting Trials flow chart. The inclusion criteria were: patients aged from 40 to 70 years old, patients with chief complaint history of at least 1 month and knee joint pain for nearly 6 months, need the analgesic drug treatment, and radiology confirmed knee osteoarthritis. The eligible patients would be randomly divided into 2 groups through applying the random numbers generated by computer before surgery. Outcomes after treatment were assessed using the Western Ontario and McMaster University and the scoring systems of visual analogue scale which were recorded through questionnaires accomplished via the patients prior to the first injection and then at three and six months, 1 and 2 years follow-up. Any adverse events occurred within 1 year after surgery were recorded during follow-up.ResultsThis should suggest whether biological methods can offer more lasting outcomes than the viscosification.Trial RegistrationThis study protocol was registered in Research Registry (researchregistry6265).Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

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