As an important therapy for anterior cruciate ligament ( ACL ) ruptures,ACL reconstruction using autogenous tendon grafts has been gradually accepted by the majority of doctors and patients,but there is a lack of an intensive study on the postoperative complications.Deep vein thrombosis ( DVT ),peripheral neuropathy and muscle weakness may be caused by the use of tourniquets.The joint infection rate after arthroscopic ACL reconstruction is about 0.3％-1.7％.The pollution of surgical tools and grafts is the main cause of postoperative knee infections.The infection chance will be increased due to soft tissue injuries in harvesting tendons and the use of internal fixation.Erythrocyte sedimentation rate ( ESR ) and C-reactive protein ( CRP ) are considered to be the effective laboratory indexes in early diagnosis of infections after ACL reconstruction.The application of sensitive antibiotics,repeated arthrocentesis and arthroscopic debridment are important and effective in the treatment of knee joint infections.Injuries of the infrapatellar branch of the saphenous nerve and the lateral sural cutaneous nerve may lead to sensory disability in the anterior region and the distal end of the affected knee.The choice of incision location and fixed position of the affected limb are related to nerve injuries.The incidence of cysts after ACL reconstruction is not high,and tibial tunnel cyst and cruciate ligament cyst are relatively common.The symptoms can be alleviated with the treatment of arthroscopic cystectomy.The incidence of postoperative fibrosis of the knee joint is 4％-35％,which is mainly associated with tunnel positioning,combined soft tissue injuries and postoperative rehabilitation exercise.
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