Useful in patients with joint pain due to arthrosis or rheumatism who do not respond to conservative therapies (medicines and/or physiotherapy), and where it is necessary to reduce inflammation or nourish cartilage and synovium. Infiltration, carried out under ultrasound guidance for precise visualisation of the target, consists of injecting drugs (with anti-inflammatory and/or lubricating activity) into the joints (hip, knee, shoulder, lumbar and cervical facet joints, small joints of the hand and foot) in order to reduce pain symptoms.

Hyaluronic acid is a substance naturally produced by the human body that can be found in the connective tissue of the skin, cartilage or tendons in joints. Synovial fluid in joint cavities provides viscosity and prevents bones from coming into contact with each other during movement. Hyaluronic acid contributes to lubrication mechanisms under load and protects the tissue from penetration by inflammatory cells or lytic enzymes. When, due to ageing or specific pathologies, hyaluronic acid does not regenerate after being metabolised and is lacking, local injections can be used. In joints suffering from severe arthrosis, the purpose of intra-articular injection of hyaluronic acid, called viscosupplementation, is to restore the viscoelastic properties of synovial fluid. Hyaluronic acid stimulates anabolic activity with production of new cartilage and its antiphlogistic and analgesic action is even more effective in the early stages of the disease.  The use of intra-articular therapy with hyaluronic acid is indicated in patients who have not responded to physiotherapy and/or pharmacological treatments.