Accelerometer Measurement of Trunk Lateral Fluctuation During Walking Following Total Knee Arthroplasty in Patients With Osteoarthritis

in Journal of Aging and Physical Activity
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This study aimed to clarify the effect of total knee arthroplasty (TKA) on trunk fluctuation and regularity of gait in patients with knee osteoarthritis by an accelerometer. The participants included 18 patients with knee osteoarthritis undergoing TKA. The gait at a comfortable velocity was assessed pre- and post-TKA by a triaxial accelerometer attached to the neck and lumbar regions. Measurement post-TKA was performed 4 weeks after surgery. Trunk fluctuation was estimated by the root mean square (RMS) of acceleration and RMS ratio (the ratio of RMS in each direction to the total RMS). Regularity of gait was estimated using the autocorrelation function. The results showed that TKA significantly decreased the RMS ratio in mediolateral acceleration of the neck and lumbar regions and reduced gait regularity. TKA appears to reduce compensatory trunk motion through the improvement of knee function. An assessment of trunk fluctuation using an accelerometer is useful for the clinical assessment of patients with knee osteoarthritis pre- and post-TKA.

Saida and Kuroki are with Izumi Regional Medical Center, Akune, Japan. Kawada and Kiyama are with the Faculty of Medicine, Kagoshima University, Kagoshima, Japan. Nakai and Miyazaki are with the Doctoral Program of Neuromotor Science, Graduate School of Health Sciences, Kagoshima University, Kagoshima, Japan. Tsuneyoshi is with Nanpuh Hospital, Kagoshima, Japan. Kiyama is also with the Course of Physical Therapy, School of Health Sciences, Faculty of Medicine, Kagoshima University, Kagoshima, Japan.

Kiyama (kiyama@health.nop.kagoshima-u.ac.jp) is corresponding author.
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