Publisher DOI: 10.1109/BioCAS49922.2021.9644959
Title: An Electronic Osteosynthesis Implant for Continuous Load Monitoring using a Strain Gauge
Language: English
Authors: Adam, Christian  
Barth, Tobias 
Münch, Matthias 
Seide, Klaus 
Krautschneider, Wolfgang 
Keywords: bluetooth low energy; continuous monitoring; osteosynthesis; strain measurement; wireless power transfer
Issue Date: Oct-2021
Source: IEEE Biomedical Circuits and Systems Conference (BioCAS 2021)
Abstract (english): 
The utilization of strain gauges for monitoring the applied mechanical load to osteosynthesis plates using electronic implants was reported several times in literature. The technique was found to provide valuable information for monitoring the fracture healing process and for improving the rehabilitation. This paper introduces a new electronic osteosynthesis implant, which uses supercapacitors as an energy storage for short term autonomous operation. Moreover, a bluetooth low energy (BLE) transceiver is integrated into the system, which covers larger distances and is less sensitive to misalignment than the commonly used inductive data transmission. This improves the usability of the proposed system for the patients. The system can continuously sample and transmit strain values at a sampling rate of 5 Hz for more than 10 min without being recharged. More than 60 cm of distance in any practically relevant direction can be covered by the BLE data transmission if the implant is placed 5 cm deep in a phantom. The implant dimensions of 20 mm x 16 mm still fit on osteosynthesis plates for larger bones.
Conference: IEEE Biomedical Circuits and Systems Conference, BioCAS 2021 
ISBN: 978-172817204-0
Institute: Integrierte Schaltungen E-9 
Document Type: Chapter/Article (Proceedings)
Project: KMU-Innovativ-Verbundprojekt: Elektronische Instrumentierung von Osteosynthese-Implantaten zum Monitoring des Heilungsverlaufs und zur Überlastprävention (IOMON) 
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