Bader Yousef, Langlois David, Baddour Natalie, Lemaire Edward D
Department of Mechanical Engineering, University of Ottawa, 800 King Edward Ave., Ottawa, ON K1N 6N5, Canada.
Össur, Grjothals 1-5, 110 Reykjavik, Iceland.
Bioengineering (Basel). 2023 May 19;10(5):614. doi: 10.3390/bioengineering10050614.
Hip-knee-ankle-foot prostheses (HKAF) are full lower-limb devices for people with hip amputations that enable individuals to regain their mobility and move freely within their chosen environment. HKAFs typically have high rejection rates among users, as well as gait asymmetry, increased trunk anterior-posterior lean, and increased pelvic tilt. A novel integrated hip-knee (IHK) unit was designed and evaluated to address the limitations of existing solutions. This IHK combines powered hip and microprocessor-controlled knee joints into one structure, with shared electronics, sensors, and batteries. The unit is also adjustable to user leg length and alignment. ISO-10328:2016 standard mechanical proof load testing demonstrated acceptable structural safety and rigidity. Successful functional testing involved three able-bodied participants walking with the IHK in a hip prosthesis simulator. Hip, knee, and pelvic tilt angles were recorded and stride parameters were analyzed from video recordings. Participants were able to walk independently using the IHK and data showed that participants used different walking strategies. Future development of the thigh unit should include completion of a synergistic gait control system, improved battery-holding mechanism, and amputee user testing.
髋-膝-踝-足假肢（HKAF）是为髋关节截肢者设计的全下肢装置，可使患者恢复行动能力，并在其选择的环境中自由活动。HKAF在用户中的排斥率通常较高，同时还存在步态不对称、躯干前后倾斜增加以及骨盆倾斜增加等问题。为解决现有解决方案的局限性，设计并评估了一种新型集成髋-膝（IHK）单元。该IHK将电动髋关节和微处理器控制的膝关节整合为一个结构，共享电子设备、传感器和电池。该单元还可根据用户腿长和对线情况进行调整。ISO-10328:2016标准机械验证载荷测试表明其结构安全性和刚性可接受。成功的功能测试包括三名身体健全的参与者在髋关节假肢模拟器中使用IHK行走。记录了髋、膝和骨盆倾斜角度，并从视频记录中分析步幅参数。参与者能够使用IHK独立行走，数据显示参与者采用了不同的行走策略。大腿单元的未来发展应包括完善协同步态控制系统、改进电池固定机制以及对截肢用户进行测试。
