Intra-articular corticosteroid injections

Intramuscular Injection: Provides an extended duration of therapeutic effect and fewer side effects of the kind associated with oral corticosteroid therapy, particularly gastro-intestinal reactions such as peptic ulceration. Studies indicate that, following a single intramuscular dose of 80 mg triamcinolone acetonide, adrenal suppression occurs within 24 - 48 hours and then gradually returns to normal, usually in approximately three weeks. This finding correlates closely with the extended duration of therapeutic action of triamcinolone acetonide.

Cartilaginous intra-articular bodies float freely within the synovial fluid, which they require for nutrition and growth.  Progressive enlargement and ossification occur with time.  If they remain free, they continue to grow larger and more calcified.  In severe cases, they may occupy the entire joint space or penetrate to adjacent tissues.  Alternately, they can deposit in the synovial lining, reestablish a blood supply, and become replaced by bone.  On occasion, synovial reattachment can lead to complete reabsorption of the cartilage fragment.

Whichever approach is used, the actual injection site can be marked with a fingernail imprint or the barrel of a pen. Next, sterile preparation with a povidone iodine preparation (Betadine) and alcohol can be performed. A 22- to 25-gauge needle can be used for the injection. Local anesthesia with lidocaine before the injection can be used, but with a small gauge needle this is not always necessary. Alternatively, an ethyl chloride spray can be used for local anesthesia. Following puncture through the skin and into the joint space, the injection is accomplished. If resistance is encountered, redirection of the needle may be necessary.

Intra-articular corticosteroid injections

intra-articular corticosteroid injections

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