Validation of the DyCare® Lynx System for Motion Analysis of the Wrist

Completed

• Conditions: Healthy Volunteers
• Interventions: Device: 3D Motion analysis

• Registration Number: NCT04773535
• Lead Sponsor: University of Zurich

Brief Summary

This project is set to compare the wrist joint movement measurements of the DyCare® Lynx System with optoelectronic motion analysis using a marker system and infrared cameras.

A total of 10 healthy test persons will be subjected to both the DyCare® Lynx and the Vicon® measurements during standard movements as well as during activities of daily living. The wrist joint angles measured with both systems will be compared.

Detailed Description

The accepted laboratory gold standards for human motion analysis are too over-elaborated for clinical use. The DyCare® Lynx system is user-friendly and has been proven reliable for motion evaluation of different joints, but not yet for the wrist.

Therefore, this project is set to compare the wrist joint movement measurements of the DyCare® Lynx System with optoelectronic motion analysis using a marker system and infrared cameras. DyCare® Lynx is based on two inertial sensors (DyTrack) capable of objectively measuring three dimensional joint movements in real time. Each inertial sensor includes an accelerometer, gyroscope and magnetometer and captures up to 1'000 samples per second. DyCare® Lynx is certified for measurements on the human musculoskeletal apparatus (EN ISO 13485:2003 Certificate No. 15185 - M), is CE marked and will only be applied to each participant for a few minutes during the measurements. The control measurements will be conducted using a Vicon® motion capture system in the Motion Analysis Laboratory of the Department of Plastic Surgery and Hand Surgery of the University Hospital of Zurich. The Vicon® system is equipped with 11 infrared cameras. The system is made for 'Life science application' and is approved as CE medical device. A total of 10 healthy test persons will be subjected to both the DyCare® Lynx and the Vicon® measurements during standard movements as well as during activities of daily living. The wrist joint angles measured with both systems will be compared, therefore limits of agreement, maximum difference and root mean squared difference will be calculated to quantify the deviation between methods. The standard error of measurements will be calculated to determine repeatability of the systems.

Study Timeline

• Study Start: 2018-03-01
• Primary Completion: 2019-03-28
• Study Completion: 2019-12-31
• Study First Submitted: 2020-11-19
• Status Verified: 2021-02
• Study First Submitted QC: 2021-02-23
• Last Update Submitted: 2021-02-23
• Study First Posted: 2021-02-26
• Last Update Posted: 2021-02-26

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 10

Inclusion Criteria

• 10 test persons with healthy right-dominant hands
• Test Persons older than 18 Years
• Test persons willing and able to give written informed consent to participate in the study

Exclusion Criteria

• Inflammatory disease (e.g. rheumatoid arthritis)
• German language barrier to understand instructions
• Any disease process that would preclude accurate evaluation (e.g. neuromuscular, psychiatric or metabolic disorder)
• Legal incompetence
• Participation in any other medical device or medicinal product study within the previous months that could influence the results of the present study

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
healthy Volunteers	3D Motion analysis	Adult (\>18y) healthy volunteers without previous injuries or pathologies of the hand and upper extremity

Primary Outcome Measures

Name	Time	Method
Active wrist movement at standard movements	October 2019	Ten healthy subjects will be recorded (3D motion analysis) while performing flexion-extension and radial-ulnar deviation movements of their right wrist using inertial sensors and skin markers

Secondary Outcome Measures

Name	Time	Method
Active Wrist movement during activities of daily living.	January 2020-August 2021	Ten healthy subjects will be recorded (3D motion analysis) while performing during ADLs: opening a jar, opening a lid pot, turning a key, dart-throwing.
Time Consumption of measurements using DyCare® Lynx	October 2019	Minutes necessary to attach the sensors to the patients and to record the movements.
Comfort of the wearable Sensors	October 2019	questionnaire looking into six dimensions of comfort as proposed by Knight and Baber (Knight, J.F.; Baber, C. A tool to assess the comfort of wearable computers. Human Factors 2005, 47, 77-91, doi:10.1518/0018720053653875.

Trial Locations

Locations (1)

University Hospital Zurich, Clinic of Reconstructive Surgery; 🇨🇭 Zurich, ZH, Switzerland