Reconstruction of tendon sheath of finger flexor tendon

The injury of the tendon can be accompanied by damage to the important annular thickening of the bone fiber sheath (especially the A2 and A4 tackles); or during the previous surgical treatment, such as the first stage of surgical repair or subsequent tendon release, it may also damage the tackle . During the reconstruction process (including tendon lysis, one-stage and staged tendon transplant reconstructions), reconstruction is usually unsuccessful if no effort is made to rebuild the tackle. When there is no pulley, the direction of the tendon to the stop will change, the restraint of the support belt will be destroyed, flexion contractures will occur in the proximal interphalangeal joints, subcutaneous bowstring bulges will be seen on the palm, and the tendon's sliding range will be lost. If a finger loses the function of the A2 and A4 pulleys, the tendon will not have satisfactory function after the tendon is released, and the tendon transplantation and reconstruction will be useless. The indications of the A2 and A4 block reconstruction are: the block system remaining after the tendon is released cannot function effectively, or as part of the first and second phase tendon transplantation reconstruction. Injury fingers should have the following conditions: fractures and joint injuries have healed, neurovascular bundle injuries are light or gradually recovered, soft tissue coverage is good and scars are scarce.