B. Stefanovic et al., "Arm and Forearm Scanning Methodology for the Development of an Orthotic Device for Tetraplegic Patients", Proc. of 3DBODY.TECH 2020 - 11th Int. Conf. and Exh. on 3D Body Scanning and Processing Technologies, Online/Virtual, 17-18 Nov. 2020, #06, https://doi.org/10.15221/20.06.
Arm and Forearm Scanning Methodology for the Development of an Orthotic Device for Tetraplegic Patients
Branko STEFANOVIC, Monika MICHALIKOVA, Lucia BEDNARCIKOVA, Marianna TREBUNOVA, Radovan HUDAK
Department of Biomedical Engineering and Measurement, Faculty of Mechanical Engineering, Technical University of Kosice, Kosice, Slovakia
The upper limb rehabilitation of the tetraplegic patients in the early stage of treatment consists of the grasp execution with the assistance of another person. The aim is to create an orthotic device for grip rehabilitation and to eliminate the need for assistance from rehabilitation nurse. To accomplish this target, it is necessary to obtain the positives of the patient's arm and forearm.
The subjects with insufficient strength of upper limb movement are the target group of this study. Their physical state complicates the conventional way of obtaining measures and shape of the upper limb for the purpose of designing orthotic devices. Appropriate method for hand and forearm 3D scanning has been proposed to achieve a satisfactory positive model.
The scanning process was divided into two scans of the hand, forearm and fingers with the Artec Eva 3D scanner. It was necessary to develop specific methodology of suitable scanning positions for the purpose of this work.
To hold the correct position of upper limb during scanning process is complicated, because of absence or lack of strength in the upper limb. The scanning position of the hand and forearm is the wrist extension and the thumb opposition to the fingers. This could be done with the assistance of a second person with special instruments. This scanning was performed with the focus on the dorsal part of the hand, the thumb and the radial part of the forearm. The fingers were scanned in the position with the palm placed on a cylinder surface, to achieve a scan with the fingers separated from each other. The focus during the scanning process was on the dorsal part of the fingers.
The required and important segments of the hand and forearm have been successfully scanned with Artec Eva 3D scanner and were used for the CAD designing of an individual rehabilitation hand orthosis. This orthotic device can later be manufactured with additive manufacturing technology.
3D scanning, tetraplegia, positives obtaining, hand orthosis, upper limb
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