Knee joint diathermy using microwave technology

Ghazwan, Aseel; Hamzah, Hayder

doi:10.30772/qjes.2024.149417.1222

	Knee joint diathermy using microwave technology
Al-Qadisiyah Journal for Engineering Sciences
Article 9, Volume 17, Issue 4, December 2024, Pages 383-389 PDF (594.22 K)
Document Type: Research Paper
DOI: 10.30772/qjes.2024.149417.1222
Authors
Aseel Ghazwan^* ¹; Hayder Hamzah²
¹Department of Biomedical Engineering, Al-Nahrain University, Baghdad, 10011, Iraq
²Department of Electronics and Communications Engineering, College of Engineering, University of Al-Qadisiyah, Al-Qadisiyah, 58001, Iraq
Abstract
Abstract: Microwave diathermy (MD) improves knee osteoarthritis pain and function. However, non-adherence to this therapy remains a major concern. The equipment is expensive and requires substantial deployment; thus, it's only available in professional physiotherapy facilities. Consequently, the practicality and widespread applicability of this heating therapy are limited. Therefore, the purpose of this study was to present a new modality treatment of MD specialized for knee joints by developing an applicator that operates at 433.78 MHz with high quality factor (~6000), for localized heating using a re-entrant microwave cavity (RMC). RMC was designed and simulated using COMSOL Multiphysics®4.4. Simulation results have shown the capability of this heating system to develop localized heating at the knee joint and peri-articular structures with a very high-power absorption rate. ~95% of the delivered power to the applicator has been absorbed by the knee joint owing to its high-quality factor. The relatively small volume over which the electric energy is focused makes it an attractive and viable candidate for manufacturing as a small and portable device to be available for patients to use it at home.
Keywords
Knee joint; Re-entrant microwave cavity; Microwave diathermy; Transmission coefficient; Power absorbed density

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