Gait analysis of patients with lumbar spinal stenosis using a wearable tri-axial acceleration sensor

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  • Kinno Dachi
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
  • Murakami Hideki
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
  • Endo Hirooki
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
  • Yamabe Daisuke
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
  • Chiba Yusuke
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
  • Abe Yuichiro
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
  • Wada Shuntaro
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan
  • Chida Yasushi
    Bycen Inc., Kobe, Japan
  • Doita Minoru
    Department of Orthopedic Surgery, School of Medicine, Iwate Medical University, Yahaba, Japan

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Other Title
  • ウエアラブル3軸加速度センサを用いた腰部脊柱管狭窄症患者の歩行解析

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Description

Lumbar spinal stenosis (LSS) is one of the most common causes of gait disturbance. However, most gait analyses in patients with LSS require a laboratory and do not yield results instantly. Lissajous index (LI) is a method that represents the gait asymmetry visually and numerically based on trunk acceleration data. We investigated the effect of surgery on gait disturbance and assessed whether LI can be useful for the quantitative analysis of gait in patients with LSS. Thirty-two patients were evaluated during a 6-minute walking test with a wearable tri-axial acceleration sensor, preoperatively and at 3 months postoperatively. The distance walked significantly increased from 395.1 ± 60.8 m preoperatively to 455.4 ± 64.4 m postoperatively (p < 0.001). The preoperative LI value increased over time (p < 0.001) and showed a tendency to postoperative improvement. The postoperative LI value was significantly lower than the preoperative value at 1–4 min (p < 0.05) and was much lower at 4–6 min (p < 0.01). Preoperative and postoperative LI changes correlated with clinical scores (p < 0.05). Thus, surgery improves gait symmetry, and LI values can be useful for evaluating gait in patients with LSS.

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