File:Principles of electro-medicine, electrosurgery and radiology - a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique (1917) (14757662481).jpg

Identifier: principlesofelec00mati (find matches)
Title: Principles of electro-medicine, electrosurgery and radiology : a practical treatise for students and practitioners. With chapters on mechanical vibration and blood pressure technique
Year: 1917 (1910s)
Authors: Matijaca, Anthony
Subjects: Vibration Electrotherapeutics X-rays Blood pressure Electric Stimulation Therapy X-Ray Therapy Electrosurgery
Publisher: Butler, New Jersey Tangerine, Fl. New York City : Published by Benedict Lust
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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. 4—Milli-ampere Meter. cancer; dissolving stricture of the mucous tract, etc.) and in metalliccataphoresis. Covered electrodes are used for surface work, and should always besoaked in a solution of bicarbonate of soda or sodium chloride (normalsalt solution), which offers very little resistance to the passage of elec-tricity. Size of the Electrodes. The larger the electrodes, the larger the partthrough which the current passes. The size of the electrodes govern directly the density of the currentwhen a certain unit of current is passing; for example, employing 50milliamperes with a pair of electrodes of even size, 3 by 5 inches, or 15square inches to each electrode. If we retain the current strength of 50milliamperes, but increase the size of the electrodes to 6 by 10 inches,or 60 square inches, our current density would be one-fourth that whichit was before (because the current will be distributed over 60 squareinches, instead of 15 square inches). The greater the strength of cur-
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Fig. 5—Motor Generator. Electro-Medicine, Electro-Surgery and Radiology 25 rent passing, and the longer the time during which the current is flow-ing, the greater is the effect. Application of Electrodes. In the application of electrodes to thebody, we refer to terms stabile and labile. Stabile means that oneor both electrodes are held stationary on the indicated part of the body. Labile is opposite to stabile, and means that one or both electrodesare moved over the surface. The electrodes should always be placed in position prior to turningon the current, and the current should be turned off prior to removingthe electrodes. They should be applied in such a manner that thecurrent must find its way directly through the part to be treated. Ifwe wish to treat a knee, for instance, the electrodes must be applied toeither side. The terms anode and cathode are applied to the electrodes connectedto the positive and negative poles, respectively. (Glass vacuum and other electrodes will be de

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