[Case-control study of influence factors analysis on short-term recovery after total knee arthroplasty in old patients with osteoarehritis].

OBJECTIVE: To investigate the relationship between variable influence factors and postoperative 2 week hospital special surgery (HSS) of knee joint, thus offer the treatment suggestion to patients with osteoarthritis, and judge the comprehensive effective prognosis to the clinical patient. METHODS: From March 2008 to August 2010, 72 patients with 72 knees were treated with TKA (treatment group), including 30 males and 42 females with a mean age of (71.9 +/- 6.2) years (ranged, 60 to 86 years). Twenty-two patients with HoldenIV OA treated by arthroscopy were in the control group, including 10 males and 12 females with a mean age of (70.5 +/- 5.9) years. The index including height, weight, BMI, muscle strength,knee joint HSS score and ROM were evaluated before operation and at 1st, 2nd weeks after operation. RESULTS: The HSS knee score and ROMs of patients in the treatment group improved. The pre-operative ROM, HSS score, knee pain, continous passive motion (CPM) at different level (i.e.CPM initial angle) had a prominent positive correlation with HSS score in postoperative 2 weeks. The factors such as patients' age, height, weight, BMI, muscular strength, etc. had no obvious relevant to HSS score in postoperative 2 weeks. CONCLUSION: The pre-operative HSS score, knee pain, knee ROM, perioperative severe complications, and postoperative CPM initial angle have a positive correlation with the postoperative effects.