Characteristics of Stair Ascent in Patients with Knee Osteoarthritis.

, Kim, Deog Young; , Park, Chang il; , Chang, Won Hyuk; , Park, Tae Hoon; , Ahn, So Young; , Lee, Sun Kyoung; , Lee, Don Sin

Original Article

Journal of the Korean Academy of Rehabilitation Medicine 2005;29(6):654-661.

Kim, Deog Young , Park, Chang il , Chang, Won Hyuk , Park, Tae Hoon , Ahn, So Young , Lee, Sun Kyoung , Lee, Don Sin

Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Korea. huripark@hanmail.net

슬관절 골관절염 환자의 계단 오르기 동작의 특징

김덕용, 박창일, 장원혁, 박태훈, 안소영, 이선경, 이돈신

연세대학교 의과대학 재활의학교실 및 재활의학연구소

Abstract

Objective
To investigate the kinematic and kinetic characteristics of stair ascent in patients with knee osteoarthritis.
Method
Twenty patients with knee osteoarthritis and twenty healthy controls were recruited. The kinematic and kinetic data were obtained through a three dimensional motion analyzer. The kinematic and kinetic data during stair ascent were compared between two groups.
Results
The total required time of stair ascent was significantly longer in the osteoarthritis group than that of the control group (p＜0.05). In comparison with the control group, the angle of maximal pelvis anterior tilting, minimal and maximal hip flexion and minimal knee flexion were significantly increased (p＜0.05). However, the angle of knee flexion and ankle dorsiflexion at initial contact were significantly decreased in the osteoarthritis group (p＜0.05). The maximal moment and power of knee extension and ankle plantarflexion were significantly decreased in the osteoarthritis group (p＜0.05). Sixteen patients (80.0%) in the osteoarthritis group showed flexion arc after initial contact. "W" sign was shown in 16 patients (80.0%).
Conclusion
We found the unique kinematic and kinetic patterns during stair ascent in patients with knee osteoarthritis, and that knee osteoarthritis influence not only kinematic and kinetic patterns of knee but also those of hip and ankle. (J Korean Acad Rehab Med 2005; 29: 654-661)

Key Words: Knee, Stair, Osteoarthritis, Motion analysis