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A 2020 meta-analysis found that intra-articular injection of high molecular weight HA improved both pain and function in people with knee osteoarthritis. [27] Hyaluronic acid has been used to treat dry eye. [28] Hyaluronic acid is a common ingredient in skin care products. Hyaluronic acid is used as a dermal filler in cosmetic surgery. [29]
In osteoarthritis, there is a loss of articular hyaluronic acid activity, likely contributing to pain and stiffness associated with the condition. Hyaluronic acid injections are an FDA-approved treatment for osteoarthritis of the knee, and are sometimes also used for other joints. However, the merits of HA injections are still disputed.
In osteoarthritis, joint injection of glucocorticoids (such as hydrocortisone) leads to short term pain relief that may last between a few weeks and a few months. [5] Injections of hyaluronic acid have not produced improvement compared to placebo for knee arthritis, [6] [7] but did increase risk of further pain. [6]
Sodium hyaluronate is the sodium salt of hyaluronic acid.It is a glycosaminoglycan and long-chain polymer of disaccharide units of Na-glucuronate-N-acetylglucosamine. It can bind to specific receptors for which it has a high affinity.
Ultrasound-guided hip joint injection: A skin mark is made to mark the optimal point of entry for the needle. [111] Use of analgesia, intra-articular cortisone injection and consideration of hyaluronic acids and platelet-rich plasma are recommended for pain relief in people with knee osteoarthritis. [112]
The injection of a steroid into a joint is used to reduce inflammation associated with conditions such as osteoarthritis, and the effects may last for up to 6 months following a single injection. [22] Hyaluronic acid injection is used to supplement the body's natural synovial fluid and decrease the friction and stiffness of the joint. [22]