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

Abstract

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.

Wearable Inertial Sensors for Gait Analysis in Adults with Osteoarthritis—A Scoping Review

“…Specifically, impact accelerations were found to be among the most common biomechanical outcomes, following ST parameters and joint/segment kinematics. Segmental accelerations can be examined using a variety of methods, such as the overall amount of multi-axis accelerations (e.g., root mean square [ 23 , 30 , 56 , 63 , 72 , 82 ] or mean [ 30 , 88 ]), impacts peaks [ 21 , 25 , 28 , 34 , 45 , 48 , 56 , 59 , 60 , 81 , 82 , 87 ], or waveform analyses [ 50 , 51 , 52 ]. These outcomes have been shown to be reliable in healthy adults [ 15 ] and adults with knee OA [ 52 , 56 , 82 ], and can be measured at a variety of placements including the lower back [ 21 , 23 , 25 , 28 , 50 , 51 , 52 , 63 , 72 ], thigh [ 50 , 51 , 52 , 81 , 82 ], shank [ 34 , 45 , 48 , 50 , 51 , 52 , 56 , …”

“…These outcomes have been shown to be reliable in healthy adults [ 15 ] and adults with knee OA [ 52 , 56 , 82 ], and can be measured at a variety of placements including the lower back [ 21 , 23 , 25 , 28 , 50 , 51 , 52 , 63 , 72 ], thigh [ 50 , 51 , 52 , 81 , 82 ], shank [ 34 , 45 , 48 , 50 , 51 , 52 , 56 , 59 , 60 , 81 , 82 , 87 ], and foot [ 23 , 30 ]. While for most of the studies we identified examined cross-sectional differences between OA and healthy gait, these outcomes may provide important and objective information that can supplement the clinical outcomes of TKA [ 25 , 34 , 51 , 72 , 88 ].…”

Use of a Triaxial Accelerometer to Measure Changes in Gait Sway and Related Motor Function after Corrective Spinal Fusion Surgery for Adult Spinal Deformity

“…A significant factor among walking and balance tests in post-operative ASD patients was the timed up-and-go test (TUG), which correlated with the Oswestry disability index (ODI) after ASD surgery [27,28]. In recent years, many gait analyses have been performed using accelerometers to calculate RMS, a measure of gait sway in orthopaedic disorders [29][30][31]. However, there have been no reports using accelerometers to investigate changes in RMS before and after ASD corrective surgery.…”