Abstract
1) A vary of the subchondral venous congestion are almost agree with grade of degenerative change in the knee. In severe osteoarthritis, periosteal collateral vessels is defective.
2) After operation of intra-articular surgery and high tibial osteotomy, venous congestion is reduced and collateral vessels is increased.
3) In clinical investigation, operation was most effective for relief of pain and inactivity of the knees were improved.
4) In operative procedure of the knee, it is suggested that intraosseous circulation is accelerated.
