Orthovisc or Synvisc may be used to treat knee osteoarthritis to prevent or delay needing a total knee replacement surgery. When the synovial fluid becomes thinner and loses its elasticity and viscosity (ability to lubricate), the osteoarthritic, synovial fluid cannot provide 'cushioning' in your knee joint. A lubricant such as Orthovisc is injected into the joint cavity to replace the lost synovial joint fluid. Corticosteroid injections are used to treat conditions such as bursitis, tendonitis, and arthritis. Intra-Articular or JOINT Steroid Injections provide prompt and effective reduction in local inflammation. Steroid injections are often given into the joint cavity. Common examples are the shoulder, hip, knee, AC (acromial-clavicular), and SI (sacroiliac) joints. Injections into BURSA used to reduce pain and inflammation of the bursa (which is a closed fluid-filled sac that functions to provide a gliding surface to reduce friction between tissues of the body). This injection does not go into the joint cavity itself. Common examples are the subacromial bursa (shoulder). trochanteric bursa (hip), ischial tuberosity bursa (buttocks), and the pes anserine bursa (knee). TENDON injections are commonly done for tendonitis or tendinopathy problems to decrease the pain and inflammation. Common examples are tennis elbow and golfer's elbow (epicondylitis), rotator cuff (shoulder), runner's knee (iliotibial tract), jumper's knee (patellar tendon) and others. All of the above injections are done with US (Ultrasound) guidance, allowing us to see the intended structure.