Use este identificador para citar ou linkar para este item: http://repositorio.utfpr.edu.br/jspui/handle/1/816
Título: A versatile current source for low, middle frequencies and interferential pulse therapies
Autor(es): Oliveira, Paulo Henrique de
Orientador(es): Gamba, Humberto Remigio
Palavras-chave: Estimulação elétrica transcutânea do nervo
Eletroterapia
Engenharia biomédica
Engenharia elétrica
Transcutaneous electrical nerve stimulation
Electrotherapeutics
Biomedical engineering
Electric engineering
Data do documento: 27-Abr-2012
Editor: Universidade Tecnológica Federal do Paraná
Câmpus: Curitiba
Citação: OLIVEIRA, Paulo Henrique de. A versatile current source for low, middle frequencies and interferential pulse therapies. 2012. 116 f. Dissertação (Mestrado em Engenharia Elétrica e Informática Industrial) – Universidade Tecnológica Federal do Paraná, Curitiba, 2012.
Resumo: Electrical stimulation is an important tool in medicine with applications like muscle rehabilitation, pain management and pacemakers. Portable stimulation devices for home use are divided mainly in two domains: low and middle frequency therapies. Due to the lack, in Germany, of a system to provide both therapies at the same equipment, the main objective of this project is the development of a current source not only capable of that, but also able to generate arbitrary stimulation patterns controlled by an external microcontroller. Moreover, the system should make possible the use of interferential current therapy. The result of the project is an electronic device that triggers current stimulation patterns based on three control signals, which could be easily generated by a microcontroller. The system provides LF stimulation with balanced current pulses up to 80mA through 1k? load impedance, pulse widths between 50 and 1000µs, and frequencies up to 150Hz. It also provides MF stimulation outputs up to 100mApp, with a modulation frequency up to 4kHz and a simple interface to control the envelope waveform. It presents also two galvanic isolated channels to allow interferential current therapy and, when no output current is intended, it is able to provide a short circuit on the load to remove possible net charges introduced by the system to the patient’s body. Additionally, a MATLAB application and a SPICE simulation were developed to assist the creation of control signals. As the system is able to deliver stimulation currents with an arbitrary pattern, it can be used to find the best pulse waveforms for a series of different applications involving electrical therapy, like TENS and MES.
Abstract: Elektrostimulation ist ein wichiges Hilfsmittel in der Medizin mit Anwendungen im Bereich der Muskelrehabilitation, der Schmerztherapie und in Herzschrittmachrn. Tragbare Stimulatoren zum hauslichen Gebrauch warden hauptsachlich in zwei Gruppen unterteit: Niederfrequenz- und Mittelfrequenztherapiegerate. Bisher gibt es in Deutschland kein Great das beide Therapieformen durchfuhren kann, sodas das Hauptziel dieses Projekts die Entwicklung einer Stromquelle ist, die in der Lage ist, beide Therapieformen anzuwender. Das Great ist zusatzlich in der Lage beiebige, einstellbare Stimulationsmuster zu erzeugen, welche durch einen externen Mikrocontroller gesteuent warden. Auberdem soll disses System Interferenzstromtherapie ermoglichen. Das Ergebnis dieses Projekts ist ein elektronisches Great, das auf drei Steuersignalen basierende Reizstrommuster erzeugt. Diese Steuersignale konnen von einem Mikrocontroller einfach generiert warden. Das System ermoglicht NF-Stimulation mit ausbalancierten Stromimpulsen bis zu 80mA bei 1K? Lastimpedanz, Pulsbreiten zwischen 50 und 1000us und Frequezen bis 150Hz. Es beinhaltet MF-Stimulationsausgange fur bis zu 100mApp Ausgangsstrom, mit Modulationsfrequenzen bis zu 4k Hz und einem einfachen Interface zur Steuerung der Wellenform der Hullkurve. Es bietet zwei galvanische getrennte Kanale zur Interferenzstromtherapie. Falls Kein Ausgangsstrom benotgt wind, konnen die Ausgange Kurzeschlossen warden, um den korper des Patienten vo einer moglichen elektrischen Aufladung das Gerate zu schutzen. Daruber hinaus wurden eine MATLAB application und eine SPICE Simulation entwickelt, um die Erstellung von Steuersignalen zu unterstutzen. Das System Kann beliebige Reiztrommuster erzengen, dadurch eignet es zur Erforschung der optimalen Impulswellenformen vieler verschiedener Elektrotherapien.
URI: http://repositorio.utfpr.edu.br/jspui/handle/1/816
Aparece nas coleções:CT - Programa de Pós-Graduação em Engenharia Elétrica e Informática Industrial

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