Total Knee Arthroplasty in Asian Subjects: Preoperative Range of Motion Determines Postoperative Range of Motion?

• Published in: Orthopaedic surgery Vol. 6; no. 1; pp. 33 - 37
• Main Authors: Bin Abd Razak, Hamid Rahmatullah, Han, Xinyun Audrey, Chong, Hwei Chi, Tan, Hwee Chye Andrew
• Format: Journal Article
• Language: English
• Published: Australia Blackwell Publishing Ltd 01.02.2014; John Wiley & Sons, Inc; John Wiley and Sons Inc
• Subjects: Aged; Aged, 80 and over; Arthroplasty, Replacement, Knee; Asia - ethnology; Clinical; Female; Humans; Joint surgery; Knee; Length of Stay; Male; Middle Aged; Operative Time; Osteoarthritis, Knee - ethnology; Osteoarthritis, Knee - physiopathology; Osteoarthritis, Knee - surgery; Outcomes; Postoperative Care; Preoperative; Preoperative Care; Prospective Studies; Range of motion; Range of Motion, Articular - physiology; Retrospective Studies; Total knee arthroplasty; Treatment Outcome; Weightlifting; Asia; Range of motion; Total knee arthroplasty; Preoperative; Outcomes
• ISSN: 1757-7853; 1757-7861
• DOI: 10.1111/os.12088

Objective To evaluate whether preoperative range of motion is a key determinant of postoperative range of motion in Asian patients undergoing conventional total knee arthroplasty. Methods A retrospective review of 302 patients who underwent primary total knee arthroplasty performed by a single surgeon was conducted. Patients who had a fixed flexion deformity of ≥15° were excluded. Postoperative range of motion (ROM) was measured prospectively. Patients were stratified into two groups: preoperative ROM < 110° and preoperative ROM ≥ 110°. Postoperative ROM and mean change in ROM at 6 months and 2 years of follow‐up were then compared using Student's t‐test. Results Group of ROM < 110° had a poorer postoperative range of motion at both 6‐months and 2‐years of follow‐up than Group of ROM ≥ 110° (P < 0.001). Postoperatively, Group of ROM < 110° had gained range of motion whereas Group of ROM ≥ 110° had lost range of motion (P < 0.001). Conclusions Similar to the Western population, preoperative range of motion is a key determinant of postoperative range of motion in Asian patients. This should be taken into consideration by surgeons during preoperative planning and in managing patients’ expectations.