Electromagnetic effects on the biological tissue surrounding a transcutaneous transformer for an artificial anal sphincter system |
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| Authors: | Peng Zan Bang-hua Yang Yong Shao Guo-zheng Yan Hua Liu |
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| Institution: | (1) Departments of Psychiatry, Neurology and Radiology Services, Center for Morphometric Analysis, HST Athinoula A. Martinos Center, Harvard Medical School, Massachusetts General Hospital, Boston, MA 02129, USA;(2) HST Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, 149 13th Street, Charlestown, MA 02129, USA;(3) Department of Anatomy and Neurobiology, Boston University School of Medicine, Boston, MA 02118, USA;(4) Biomedical Engineering Department, Tufts University, Medford, MA 02155, USA; |
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| Abstract: | This paper reports on the electromagnetic effects on the biological tissue surrounding a transcutaneous transformer for an
artificial anal sphincter. The coupling coils and human tissues, including the skin, fat, muscle, liver, and blood, were considered.
Specific absorption rate (SAR) and current density were analyzed by a finite-length solenoid model. First, SAR and current
density as a function of frequency (10–107 Hz) for an emission current of 1.5 A were calculated under different tissue thickness. Then relations between SAR, current
density, and five types of tissues under each frequency were deduced. As a result, both the SAR and current density were below
the basic restrictions of the International Commission on Non-Ionizing Radiation Protection (ICNIRP). The results show that
the analysis of these data is very important for developing the artificial anal sphincter system. |
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| Keywords: | Artificial anal sphincter Transcutaneous energy transmission Current density Specific absorption rate |
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