A lubricating system for adding a lubricating fluid to an articulating joint of a patient. The lubricating system comprising a unit comprising a retractable needle for delivering the lubricating fluid to the articulating joint. The lubricating system further comprises an operating system for operating said retractable needle and at least one of an injection port, adapted to receive lubricating fluid, and an additional reservoir adapted to contain lubricating fluid. The lubricating system further comprises a conduit in fluid connection with the unit and with at least one of the injection port and additional reservoir, for supplying the unit with the lubricating fluid.
