KITE Research-Toronto Rehabilitation Institute, University Health Network, Toronto, ON M5G 2A2, Canada.
Human Physiology, School of Biomedical Sciences & Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW 2308, Australia.
Sensors (Basel). 2023 Mar 20;23(6):3291. doi: 10.3390/s23063291.
Sensor-based devices can record pressure or force over time during grasping and therefore offer a more comprehensive approach to quantifying grip strength during sustained contractions. The objectives of this study were to investigate the reliability and concurrent validity of measures of maximal tactile pressures and forces during a sustained grasp task using a TactArray device in people with stroke. Participants with stroke (n = 11) performed three trials of sustained maximal grasp over 8 s. Both hands were tested in within- and between-day sessions, with and without vision. Measures of maximal tactile pressures and forces were measured for the complete (8 s) grasp duration and plateau phase (5 s). Tactile measures are reported using the highest value among three trials, the mean of two trials, and the mean of three trials. Reliability was determined using changes in mean, coefficients of variation, and intraclass correlation coefficients (ICCs). Pearson correlation coefficients were used to evaluate concurrent validity. This study found that measures of reliability assessed by changes in means were good, coefficients of variation were good to acceptable, and ICCs were very good for maximal tactile pressures using the average pressure of the mean of three trials over 8 s in the affected hand with and without vision for within-day sessions and without vision for between-day sessions. In the less affected hand, changes in mean were very good, coefficients of variations were acceptable, and ICCs were good to very good for maximal tactile pressures using the average pressure of the mean of three trials over 8 s and 5 s, respectively, in between-day sessions with and without vision. Maximal tactile pressures had moderate correlations with grip strength. The TactArray device demonstrates satisfactory reliability and concurrent validity for measures of maximal tactile pressures in people with stroke.
基于传感器的设备可以在握持过程中记录压力或力随时间的变化，因此提供了一种更全面的方法来量化持续收缩期间的握力。本研究的目的是使用 TactArray 设备研究在脑卒中患者进行持续握持任务时最大触觉压力和力测量的可靠性和同时效度。脑卒中患者（n=11）进行了 3 次 8 秒的持续最大握持试验。双手分别在有和没有视觉的日内和日间试验中进行测试。在完整（8 秒）握持时间和平台期（5 秒）测量最大触觉压力和力。触觉测量值使用 3 次试验中的最高值、2 次试验的平均值和 3 次试验的平均值报告。可靠性通过均值变化、变异系数和组内相关系数（ICC）来确定。Pearson 相关系数用于评估同时效度。本研究发现，使用 3 次试验平均值的平均变化评估的可靠性测量值良好，变异系数良好至可接受，ICC 非常好，用于评估有和无视觉的日内试验中患手 8 秒和 5 秒平均压力的最大触觉压力的平均压力的 3 次试验平均值，以及无视觉的日间试验中患手的最大触觉压力。在非患手，使用 3 次试验平均值的平均变化非常好，变异系数可接受，ICC 良好至非常好，用于评估有和无视觉的日间试验中 8 秒和 5 秒的最大触觉压力的平均压力。最大触觉压力与握力具有中等相关性。TactArray 设备在脑卒中患者的最大触觉压力测量中具有令人满意的可靠性和同时效度。
