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An Inertial Measurement Unit-Based Wireless System for Shoulder Motion Assessment in Patients with Cervical Spinal

Riccardo Bravi1, Stefano Caputo2, Sara Jayousi2

  • 1Department of Experimental and Clinical Medicine, University of Florence, Largo Brambilla 3, 50134 Florence, Italy.

Sensors (Basel, Switzerland)
|February 9, 2021
PubMed
Summary

Wireless wearable sensors offer a reliable method for assessing shoulder range of motion in cervical spinal cord injury (CSCI) patients. This technology provides objective measurements, improving upon traditional goniometer limitations.

Keywords:
clinical settinggoniometerinertial measurement unitkinematicsmotion trackingrange of motionshoulderspinal cord injurytetraplegiawireless sensors network

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Area of Science:

  • Biomedical Engineering
  • Rehabilitation Medicine
  • Neuroscience

Background:

  • Restoring upper limb function is crucial for independence in cervical spinal cord injury (CSCI) patients.
  • Current shoulder range of motion (ROM) assessment using goniometers is subjective, time-consuming, and operator-dependent.
  • Objective and reliable methods are needed to evaluate the effectiveness of shoulder ROM interventions in CSCI.

Purpose of the Study:

  • To evaluate the validity of a customized wireless wearable sensors (Inertial Measurement Units-IMUs) system for shoulder ROM assessment in CSCI patients.
  • To compare the accuracy and reliability of IMU-based measurements against conventional goniometry in a clinical setting.

Main Methods:

  • Eight CSCI patients and eight healthy controls performed four shoulder movements (flexion, abduction, internal/external rotation) with their dominant arm.
  • Shoulder ROM was simultaneously measured using a goniometer by different testers and a customized IMU system.
  • Validity was assessed using Intraclass Correlation Coefficient (ICC) and Limits of Agreement (LOA); inter-tester reliability was also investigated.

Main Results:

  • Preliminary results indicate the IMU system's accuracy in capturing objective shoulder movement measurements in CSCI patients.
  • The study provides essential data on the system's performance compared to traditional goniometric assessments.
  • Inter-tester reliability analysis was conducted for both measurement methods.

Conclusions:

  • The wireless wearable IMU system shows promise as a valid and reliable tool for objective shoulder ROM assessment in CSCI patients.
  • This technology could support medical personnel in objectively measuring treatment efficacy, enhancing rehabilitation outcomes.
  • Further research is warranted to validate these findings in larger clinical trials.