MUSCULOSKELETAL ASPIRATION AND INJECTION
For injection, ultrasound is used to accurately guide needle tip placement into the region of interest, be it a joint, bursa, tendon sheath or other structure, prior to the injection of therapeutic material (local anaesthetic, steroid, hyaluronic acid (Durolane/Synvisc) or platelet rich plasma (PRP)).
For aspiration, ultrasound is used to guide needle tip placement into a fluid collection, be it a joint effusion, fluid distended bursa, ganglion or other, prior to the aspiration (sucking) of fluid (occasionally calcium) from the collection. This fluid may be sent to pathology for testing.
An injection is often done in association with an aspiration.