Stem cell treatments knee arthritis Chennai India by Dr.A.K.Venkatachalam. In this video stem cells are derived from the patient’s own body, prepared, mixed with PRP, and injected into the patient’s knee joint under local anesthesia. The patient can walk normally after the procedure and can return home within a few hours. No keyhole or open surgery is needed. The stem cells injected are more numerous than other sources. See here for more details.