WIRELESS SURFACE ELECTROMYOGRAPHY DEVICE DESIGN FOR LUMBAR DISC HERNIATED PATIENTS

Abstract

A portable and wireless surface electromyography device was developed for tracking the regional muscular activities of lumbar disc herniated patients. Previous studies showed that there is relation between paraspinal muscular activities and lumbar disc herniation. These studies encouraged us to develop a novel wireless surface electromyography device to follow muscular activities of lumbar disc herniated patients. Using such kind of wireless system in lumbar disc herniation studies leads to follow muscular activities practically. The overall system would lead to make diagnosis of lumbar disc herniation with a novel approach. The developed system consists of four major stages; amplification, filtering, A/D conversion, and the wireless communication stages. Bluetooth technology is chosen for communication between the proposed device and the computer. The designed device can be fully controlled within MATLAB software, and measured data can be directly streamed to computer environment. As a demonstration of the developed system, we also did certain signal processing operations in MATLAB by using measured surface electromyography signals

Keywords

• Surface electromyography, Lumbar disc herniation, Embedded biomedical systems

LOMBER DİSK HERNİLİ HASTALAR İÇİN KABLOSUZ YÜZEY ELEKTROMİYOGRAFİ CİHAZ TASARIMI

Abstract

Bel fıtıklı hastaların bölgesel kas faaliyetlerinin takibi amacıyla portatif ve kablosuz bir yüzey elektromiyografi cihazı geliştirilmiştir. Önceki çalışmalar paraspinal kas aktiviteleri ile bel fıtığı arasında ilişki olduğunu göstermektedir. Bu çalışmalar bel fıtıklı hastaların kas faaliyetlerini takip amacıyla yeni bir kablosuz yüzey elektromiyografi cihazı yapmaya teşvik etmiştir. Böyle kablosuz cihazın kullanımı bel fıtıklı hastaların kas akitivitelerini daha kolay takibini sağlayacaktır. Genel olarak sistem yeni bir yaklaşım ile bel fıtığı teşhisinin yapılabilmesinin önünü açabilecektir.Geliştirilen sistem kuvvetlendirme, filtreleme, analog-dijital dönüştürme ve kablosuz haberleşme olmak üzere dört ana kısımdan oluşmaktadır. Elde edilen cihaz ile bilgisayar arasındaki haberleşme için Bluetooth teknolojisi kullanılmıştır. Cihaz MATLAB yazılımı üzerinden kontrol edilebilmektedir ve doğrudan bilgisayar ortamına aktarılmaktadır. Geliştirilen sistem ile elde edilen yüzey elektromiyografi sinyalleri üzerinde MATLAB programıyla sinyal işleme de yapılmıştır

Keywords

• Yüzey elektromiyografi, Lomber disk hernisi, Gömülü biyomedikal sistemler

References

1. Geisser ME. Surface Electromyography and Low Back Pain, Biofeedback, Vol. 35, No. 1, 2007, pp.13-16. [2] Jordan J, Konstantinou K, O’Dowd
2. http://clinicalevidence.bmj.com/ceweb/conditions/msd/1118/1118_background.jsp#REF4] 2009. J. Herniated Lumbar Disc,
3. Skinner H. Current Diagnosis & Treatment in Orthopedics, New York: Appleton & Lange, 3rd Edition, 2003.
4. Çevikcan B, Kara S. Bel Fıtığı Hastalığı Bulunan Bireylerin Bel Ve Karın Kası Fonksiyonlarının Elektromiyografik Analizi, Elektrik, Elektronik, Bilgisayar, Biyomedikal Mühendisliği XII.Ulusal Kongresi ve Fuarı, Eskişehir, 2007.
5. Çakar Hİ, Kara S, Toker O. Bel Fıtığı Hastalığı Analizi için Portatif Elektromyiografi Cihazı Tasarımı, Biyomut 2010-15th National Meeting of Biomedical Engineering, Antalya, 2010.
6. Çakar Hİ, Kara S, Toker O. Design of a Portable Electromyography Device for Back Herniated Patients, Biodevices 2010- 3rd International Conference on Biomedical Electronics and Devices, Valencia, 2010.
7. De Luca CJ. Use of the Surface EMG Signal for Performance Evaluation of Back Muscles, Muscle&Nerve, Vol. 16, No. 2, 1993, pp.210-216.
8. Haig AJ, Weismann, G, Haugh LD, Pope M, Grobler LJ. Prospective Evidence for Change in Paraspinal Muscle Activity after Herniated Nucleus Pulposus, Spine, Vol. 18, No. 7, 1993, pp.926-929.

9. Jalovaara P, Niinimäki T, Vanharanta H. Pocket-Size, Portable Surface EMG Device in the Differentiation of Low Back Pain Patients, European Spine Journal, Vol. 4, No. 4, 1995, pp.210-212.
10. Ambroz C, Scott A, Ambroz A, Talbott EO. Chronic Low Back Pain Assessment Using Surface Electromyography”, Journal of Occupational and Environmental Medicine, Vol. 42, No. 6, 2000, pp.660-669. [11]
11. Çakar Hİ, Kara S, Toker O. A Wireless Surface Electromyography System Design for Lumbar Disc Herniated Patients, Memea 2011- IEEE International Symposium on
12. Medical Measurements and Applications, Bari, 2010. [12] Basmajian JV, De Luca CJ. Muscles Alive: Their Functions Revealed by
13. Electromyography, Baltimore: Williams & Wilkins, 3rd Edition, 1974. [13] Analog Devices, AD620: Low Drift, Low Power Instrumentation Amplifier with Set
14. Gains of 1 to 10000, [http://www.analog.com], 2004. [14] Analog Devices, AD620: Low Drift, Low Power Instrumentation Amplifier with Set
15. Gains of 1 to 10000, [http://www.analog.com], 2004. [15] Çakar Hİ. Design of a Portable Surface Electromyography (SEMG) Device for
16. Collection of SEMG Signals from Back Herniated Patients”, MSc Thesis, İstanbul: Fatih
17. University, 2010. [16] Spinelli EM, Pallás-Areny R, Mayosky MA. AC-Coupled Front-End for Biopotential
18. Texas Instruments, ADS7813-Low Power, Serial 16-Bit Sampling Analog-to-Digital Converter, [http://www.ti.com], 2005.
19. Bluegiga Technologies, WT12 Datasheet Version 2.8, [http://www.bluegiga.com/], 2009.
20. MICROCHIP, PIC18F452-28/40 pin High Performance, Enhanced FLASH Microcontrollers with 10-Bit A/D, [http://www.microchip.com], 2006.
21. Welch PD. “The Use of Fast Fourier Transform for the Estimation of Power Spectra: A Method Based on Time Averaging Over Short, Modified Periodograms”, IEEE Transactions on Audio and Electroacoustics, Vol. AU-15, 1967, pp.70-73.