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      Caracterización de los niveles de exposición a campos electromagnéticos durante el tratamiento con diatermia Translated title: Characterization of the exposure levels to electromagnetic fields during the diathermy treatment

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          Abstract

          Se realizó un estudio del campo electromagnético generado por distintos electrodos de tipo capacitivo, empleados en el equipo de fisioterapia por diatermia de onda corta YB4-66, considerando su interacción con el medio ambiente que le rodea. Se realizaron las mediciones de campo eléctrico para diferentes configuraciones de tratamiento y se utilizó un medidor de campo eléctrico de sonda isotrópica. Se diseñó, mediante un software profesional de simulación, un modelo electromagnético paramétrico bidimensional con simetría axial, para obtener detalladamente en cada configuración de los electrodos evaluados la interacción del campo electromagnético con el tejido biológico y el ambiente exterior. Se halló una buena correspondencia entre los resultados obtenidos de forma experimental y las simulaciones, lo cual permitió identificar los niveles de exposición y tomar decisiones para lograr un tratamiento más efectivo y con el menor daño posible a los seres humanos.

          Translated abstract

          A study of the electromagnetic field generated by different electrodes of capacitive type, used by the physiotherapy device for short wave diathermy (YB4-66), was carried out considering their interaction with the surrounding environment. The measurements of the electric field for different treatment configurations were carried out and a meter with electric isotropic field probe was used. By means of a professional software of simulation, a two-dimensional parametric electromagnetic model with axial symmetry was designed, to obtain detailedly in each configuration of the evaluated electrodes the interaction of the electromagnetic field with the biological tissue and the external environment. A good correspondence was found between the obtained results in an experimental way and the simulations, which allowed to identify the exposure levels and to make decisions to achieve a more effective treatment and with the shortest possible damage for the human beings.

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          Most cited references12

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          Compilation of the Dielectric Properties of Body Tissues at RF and Microwave Frequencies.

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            Agentes físicos terapéuticos

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              An evaluation of safety guidelines to restrict exposure to stray radiofrequency radiation from short-wave diathermy units.

              Short-wave diathermy (SWD), a form of radiofrequency radiation used therapeutically by physiotherapists, may be applied in continuous (CSWD) or pulsed (PSWD) mode using either capacitive or inductive methods. Stray radiation emitted by these units may exceed exposure guidelines close to the equipment. Discrepant guidelines exist on a safe distance from an operating unit for operators and other personnel. Stray electric (E-field) and magnetic (H-field) field strengths from 10 SWD units in six departments were examined using a PMM 8053 meter and two isotropic probes (EP-330, HP-032). A 5 l saline phantom completed the patient circuit. Measurements were recorded in eight directions between 0.5 m and 2 m at hip and eye levels while the units operated at maximum output and data compared to current guidelines. Results found stray fields from capacitive CSWD fell below operator limits at 2 m (E-field 4.8-39.8 V/m; H-field 0.015-0.072 A/m) and at 1 m for inductive CSWD (E-field 0-36 V/m; H-field 0.01-0.065 A/m). Capacitive PSWD fields fell below the limits at 1.5 m (E-field 1.2-19.9 V/m; H-field 0.002-0.045 A/m) and at 1m for inductive PSWD (E-field 0.74.0 V/m; H-field 0.009-0.03 A/m). An extra 0.5 m was required before fields fell below the guidelines for other personnel. These results demonstrate, under a worst case scenario, emissions from SWD exceed the guidelines for operators at distances currently recommended as safe. Future guidelines should include recommendations for personnel other than physiotherapists.
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                Author and article information

                Journal
                san
                MEDISAN
                MEDISAN
                Centro Provincial de Información de Ciencias Médicas (Santiago de Cuba, , Cuba )
                1029-3019
                June 2013
                : 17
                : 6
                : 908-914
                Affiliations
                [01] Santiago de Cuba orgnameCentro Nacional de Electromagnetismo Aplicado, Universidad de Oriente Cuba
                Article
                S1029-30192013000600004 S1029-3019(13)01700604
                9a5071b1-b82f-4fb7-8e3c-bde698b51753

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 10 March 2013
                : 25 February 2013
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 12, Pages: 7
                Product

                SciELO Cuba

                Categories
                ARTÍCULO ORIGINAL

                modeling of electromagnetic fields,fisioterapia,diatermia de onda corta,modelación de campos electromagnéticos,physiotherapy,diathermy of short wave

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