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Measurements of electric and magnetic stray fields produced by various electrodes of 27‐MHz diathermy equipment
Author(s) -
Kalliomaki P. L.,
Hietanen M.,
Kalliomaki K.,
Koistinen O.,
Valtonen E.
Publication year - 1982
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs017i05sp0029s
Subject(s) - diathermy , electrode , stray light , electric field , magnetic field , optics , biomedical engineering , materials science , physics , medicine , surgery , quantum mechanics
The present paper describes the results of measurements of electric and magnetic stray fields around three types of commercially available diathermy units with four very typical electrodes in six routine therapeutic treatments. The aim of the survey was to investigate the exposure to the physiotherapist and the exposure to unprescribed tissues. Field strengths were measured at 15 points close to the patient's body. At a distance of 0.6 m from the diathermy units the power density was less than 10 W/m 2 . With respect to stray fields the results showed that the diathermy devices are very similar but there are great differences between the electrodes during specific treatments. The results assist in selecting proper electrodes for various therapeutic treatments, as they indicate which electrodes would have minimal stray fields.