78 years old, female; 3 years after left knee arthroplasty, left knee pain and swelling for 1 month; patient underwent total knee arthroplasty revision for loose knee prosthesis 3 years ago, details unknown; postoperative recovery fair; 1 month ago fell while climbing stairs and landed on left knee, immediately felt left knee pain, swelling and impaired movement; previous history of hypertension, left total knee arthroplasty for osteoarthritis of knee joint 10 years ago The patient had a history of hypertension and had undergone left total knee arthroplasty for osteoarthritis of the knee 10 years ago; examination: knee swelling, flexion and extension disorders, dorsalis pedis artery was accessible, toe end circulation was good; X-ray suggested: treatment: artificial total knee revision, treatment: total knee replacement revision, treatment plan was controversial, the patient recovered after surgery.