Mace Michael, Mutalib Sharah Abdul, Ogrinc Matjaz, Goldsmith Nicola, Burdet Etienne
GripAble Limited, London, UK.
Bioengineering Department, Imperial College of Science Technology and Medicine, London, UK.
J Rehabil Assist Technol Eng. 2022 Mar 1;9:20556683221078455. doi: 10.1177/20556683221078455. eCollection 2022 Jan-Dec.
Grip strength is a reliable biomarker of overall health and physiological well-being. It is widely used in clinical practice as an outcome measure. This paper demonstrates the measurement characteristics of GripAble, a wireless mobile handgrip device that measures grip force both isometrically and elastically-resisted for assessment and training of hand function.
A series of bench tests were performed to evaluate GripAble's grip force measurement accuracy and sensitivity. Measurement robustness was evaluated through repeated drop tests interwoven with error verification test phases.
GripAble's absolute measurement error at the central position was under 0.81 and 1.67 kg (95 percentiles; N = 47) when measuring elastically and isometrically, respectively, providing similar or better accuracy than the industry-standard Jamar device. Sensitivity was measured as 0.062 ± 0.015 kg (mean ± std; 95 percentiles: [0.036, 0.089] kg; N = 47), independent of the applied force. There was no significant performance degradation following impact from 30 drops from a height >1.5 m.
GripAble is an accurate and reliable grip strength dynamometer. It is highly sensitive and robust, which in combination with other novel features (e.g. portability, telerehabilitation and digital data tracking) enable broad applicability in a range of clinical caseloads and environments.
握力是整体健康和生理幸福感的可靠生物标志物。它在临床实践中被广泛用作一项结果指标。本文展示了GripAble的测量特性，这是一种无线移动握力设备，可等长和弹性阻力方式测量握力，用于手部功能评估和训练。
进行了一系列台架试验，以评估GripAble握力测量的准确性和灵敏度。通过穿插误差验证测试阶段的重复跌落试验来评估测量稳健性。
GripAble在中心位置进行弹性和等长测量时的绝对测量误差分别低于0.81和1.67千克（第95百分位数；N = 47），其准确性与行业标准的Jamar设备相当或更高。灵敏度测量值为0.062±0.015千克（平均值±标准差；第95百分位数：[0.036, 0.089]千克；N = 47），与施加的力无关。从>1.5米高度跌落30次后，性能没有显著下降。
GripAble是一种准确可靠的握力计。它高度灵敏且稳健，与其他新颖特性（如便携性、远程康复和数字数据跟踪）相结合，使其能够广泛应用于一系列临床病例和环境中。
