Macon Keith, Hoang Dustin, Elizondo Lauren, Kallus Kerri, Sulzer James, Manella Kathleen
Department of Mechanical Engineering, University of Texas at Austin, Austin, TX.
Spero Rehab, Austin, TX.
Arch Rehabil Res Clin Transl. 2021 Aug 19;3(4):100153. doi: 10.1016/j.arrct.2021.100153. eCollection 2021 Dec.
To evaluate the accuracy and reliability of a simple, single-camera smartphone-based method, named the Reflex Tracker (RT) system, for measuring reflex threshold angles related to ankle clonus and quadriceps hyperreflexia.
A prospective comparison study using a high-fidelity reference standard was constructed employing a 2 × 2 × 2 factorial design, with factors of rater (tester) type (student and experienced physical therapist), joint (ankle and knee), and repetition (2 per condition).
This multicenter study was conducted at 4 outpatient rehabilitation clinics.
A convenience sample of 14 individuals with a neurologic condition presented with 20 lower limbs that exhibited ankle clonus and/or quadriceps hyperreflexia and were included in the study. Also participating in the study were 8 student and 8 experienced physical therapist raters (testers) (N=16).
Not applicable.
The plantar flexor reflex threshold angle (PFRTA) related to ankle clonus and the quadriceps reflex threshold angle (QRTA) related to quadriceps hyperreflexia were quantified.
PFRTA and QRTA results were compared between the smartphone RT method and synchronous 3-dimensional inertial measurement unit (IMU) sensor motion capture. Mean difference (bias) was minimal between RT and IMU measurements for PFRTA (bias≤0.2°) and QRTA (bias≤1.2°). Intrarater reliability for PFRTA ranged from 0.85-0.90 using RT and from 0.85-0.87 using IMU; QRTA ranged from 0.97-0.98 using RT and from 0.96-0.99 using IMU. Intersensor reliability for PFRTA and QRTA was 0.97 and 0.99, respectively. Minimum detectable change for PFRTA ranged from 7.1°- 8.7° and for QRTA ranged from 6.1°-8.3°.
RT performed comparable to IMU for accurate and reliable measurement of PFRTA and QRTA to quantify ankle clonus and quadriceps hyperreflexia in clinical settings.
评估一种基于单摄像头智能手机的简单方法——反射追踪器（RT）系统，用于测量与踝阵挛和股四头肌反射亢进相关的反射阈值角度的准确性和可靠性。
采用2×2×2析因设计构建一项使用高保真参考标准的前瞻性比较研究，因素包括评估者（测试者）类型（学生和经验丰富的物理治疗师）、关节（踝关节和膝关节）以及重复次数（每种情况2次）。
这项多中心研究在4家门诊康复诊所进行。
方便抽样选取了14名患有神经系统疾病的个体，其20条下肢表现出踝阵挛和/或股四头肌反射亢进，并纳入研究。参与研究的还有8名学生和8名经验丰富的物理治疗师评估者（测试者）（N = 16）。
不适用。
量化与踝阵挛相关的跖屈反射阈值角度（PFRTA）和与股四头肌反射亢进相关的股四头肌反射阈值角度（QRTA）。
比较了智能手机RT方法与同步三维惯性测量单元（IMU）传感器运动捕捉之间的PFRTA和QRTA结果。RT和IMU测量的PFRTA（偏差≤0.2°）和QRTA（偏差≤1.2°）的平均差异（偏差）最小。使用RT时PFRTA的评估者内信度范围为0.85 - 0.90，使用IMU时为0.85 - 0.87；使用RT时QRTA的评估者内信度范围为0.97 - 0.98，使用IMU时为0.96 - 0.99。PFRTA和QRTA的传感器间信度分别为0.97和0.99。PFRTA的最小可检测变化范围为7.1° - 8.7°，QRTA的最小可检测变化范围为6.1° - 8.3°。
在临床环境中，RT在准确可靠地测量PFRTA和QRTA以量化踝阵挛和股四头肌反射亢进方面与IMU表现相当。
