In musculoskeletal practice, most of these procedures consist of aspiration of fluid collections and injection of steroids either into joint cavities, para-articular soft tissues or tendon sheaths. More complex US-guided procedures such as biopsies of space-occupying masses and removal of foreign bodies are usually performed in specialised tertiary centres.
The procedure will be discussed with you before the scan and you will be given specific advice about driving or operating machinery. No special preparation is required. You may be asked to wear a gown for the procedure.