J Korean Phys Ther.  2021 Oct;33(5):231-237. 10.18857/jkpt.2021.33.5.231.

Effects of Gait Training Using a Robot for Balance in Total Hip Arthroplasty Patients after Bilateral Avascular Necrosis: A Case Study

• Kim SY
• Kim BG
• Cho WS
• Park CB

• KMID: 2526436
• DOI: http://doi.org/10.18857/jkpt.2021.33.5.231

Abstract

Purpose
This study sought to investigate the effects of robot-assisted gait training on balance in total hip arthroplasty (THA) patients after bilateral avascular necrosis (AVN).
Methods
This case study in two patients utilized an ‘A-B-A’ single-subject experimental design that included five days of pre-intervention, followed by five days of intervention, and five days of post-intervention. The intervention involved the use of a standing inclined robot (R-bot) for 15 minutes. The outcome measures were evaluated using the Functional Reaching Test (FRT), Time Up to Go (TUG), and the Modified One Leg Standing Test (OLST).
Results
Patient 1 showed improvement based on data gathered from baseline A to intervention period B, with results as follows: FRT improved from 27.7 cm to 41.28 cm, OLST LT from 14.03 seconds to 67.37 seconds, OLST RT from 2.94 seconds to 35.97 seconds, and TUG from 12.96 seconds to 7.82 seconds. Patient 2 also showed improvement from baseline A to intervention period B, with results as follows: FRT improved from 17.18 cm to 24.3 cm, OLST LT from 11.53 seconds to 52.01 seconds, OLST RT from 12.99 seconds to 62.19 seconds, and TUG from 27.31 seconds to 12.99 seconds.
Conclusion
Based on the results of this study, robotic rehabilitation during the early stages after surgery is effective for promoting balance in patients who have undergone THA due to bilateral AVN.

Keyword

Avascular necrosis; Total hip arthroplasties; Balance; Robot rehabilitation