At your first appointment, your doctor will take a detailed clinical history of your injury as well as any other medical conditions that may be relevant. This will be followed by a thorough physical examination. Depending on your situation, your doctor may use ultrasound* to confirm the diagnosis and pinpoint the injury site for injection.
In particular, your doctor will check to see if you have recently used any non steroidal anti-inflammatory medications (NSAID's). Examples include Nurofen, Voltaren, Mobic. These interfere with platelet production by the bone marrow so must be stopped 10 days prior to this procedure.