Correlation analysis between pre-anesthesia/post-anesthesia range of motion and knee flexion function after total knee arthroplasty

Objective To evaluate the relationship between pre-anesthesia/post-anesthesia range of motion (ROM) and knee flexion function after total knee arthroplasty (TKA). Methods 108 patients with osteoarthritis of knee joint replacement performed by the same surgeon of primary TKA screening from 2016 January to 2017 January in our hospital were enrolled in the study. Correlation analysis were conducted between pre-anesthesia/post-anesthesia ROM and knee flexion function of 1, 6, 12 months after total knee arthroplasty. Results The Correlation coefficient of the Pre-anesthesia ROM and postoperative ROM are 0.392, 0.665, 0.708 at 1, 6 and 12 months, while the Correlation coefficient of the Pre-anesthesia ROM and Post-anesthesia ROM of postoperative are 0.495, 0.759, 0.793 (P<0.001), indicating that the correlation difference between pre-anesthesia/post-anesthesia ROM and knee flexion function of 1, 6, 12 months after total knee arthroplasty is statistically significant (P<0.05). Conclusions Post-anesthesia range of motion is a better determinant of postoperative range of motion in patients. This should be taken into consideration by surgeons during preoperative planning and in managing patients'expectations. Key words: Knee joint/SU; Arthroplasty, replacement, knee; Range of motion, articular