Analysis of Lateral Straddling Motion of the Bathtub by the Differences in the First Leg of Patients after THA

Hirotaka Henmi; Yuya Takakubo; Miyuki Murakawa; Katsuhiko Suzuki; Michiaki Takagi; Toshiaki Sato

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Analysis of Lateral Straddling Motion of the Bathtub by the Differences in the First Leg of Patients after THA

VernacularTitle:人工股関節全置換術後患者における先行脚の違いによる浴槽側方またぎ動作の解析
Author: Hirotaka HENMI ¹ ; Yuya TAKAKUBO ² ; Miyuki MURAKAWA ¹ ; Katsuhiko SUZUKI ³ ; Michiaki TAKAGI ² ; Toshiaki SATO ³
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1. Department of Rehabilitation, Yamagata University Hospital
2. Department of Orthopaedic Surgery, Faculty of Medicine, Yamagata University
3. Yamagata Prefectural University of Health Sciences
Keywords: double stance phase; total hip arthroplasty; activities of daily living; three-dimension accelerometer; hip osteoarthritis
From:The Japanese Journal of Rehabilitation Medicine 2023;60(8):714-722
CountryJapan
Language:Japanese
Abstract: Objective：The movement of an elderly person involving stepping over a bathtub makes them prone to falls and requires caution. Gait analysis suggested that the risk of falling increases with time spent in supporting both legs. A similar relationship was expected for side-straddling motion. This study aims to analyze differences in the side-straddling movements between THA patients who did not fully recover their functional balance, mobility, or walking ability from the viewpoint of the ratio of time spent supporting both legs.Methods：Eleven patients with hip osteoarthritis underwent initial unilateral THA via a posterior approach. Using a portable three-dimensional motion analyzer, we calculated the percentages of time spent supporting both legs while entering the bathtub, and exiting the bathtub with a handrail and examined the factors associated with percent of the time spent supporting both legs.Results：The percentage of time spent supporting both legs when exiting the bathtub was significantly lesser when exiting using the nonoperative than the operated side. A negative correlation was found between the percentages of time spent supporting both legs. while exiting the bathtub, and the percentage of handrail load values.Conclusion：The risk of falling may be reduced by using the nonoperative leg as the leading leg when exiting a bathtub. Use of handrails contributes to a reduction in fall risk.