OBJECTIVETo 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.

METHODSFrom 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.

RESULTSThe 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.

CONCLUSIONThe pre-operative HSS score, knee pain, knee ROM, perioperative severe complications, and postoperative CPM initial angle have a positive correlation with the postoperative effects.