Röntgen rays and electro-therapeutics - with chapters on radium and phototherapy (1910) (14571427479)

Identifier: rntgenrayselectr00kass (find matches)
Title: Röntgen rays and electro-therapeutics : with chapters on radium and phototherapy
Year: 1910 (1910s)
Authors: Kassabian, Mihran Krikor, 1870-1910
Subjects: Electrotherapeutics X-rays Phototherapy Radiology Radiotherapy
Publisher: Philadelphia & London : J.B. Lippincott Company
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School



Text Appearing Before Image:
imes called con-tinuous when it is allowed to flow in onedirection, without interruption. A current is said to be interruptedwhen it is broken by the removal of one of the electrodes, or by someform of current-breaker in the electrode, or by any method of breakingin the circuit. Voltaic alternatives is the term applied to those applications inwhich the current is reversed continually, while the electrodes are keptfirm. The ascending current is one where the flow is from the peripherytoward the nerve centre. In the descending current the flow is in the direction from the nervecentre toward the periphery of a part. By the term dosage we mean the amperage of the current employedeither in treatment or for diagnostic puri)oses ; the duration of each ap-plication of the electrodes, the amount of pressure exerted, and the sizeof the surface of the electrode applied, are conditions which must betaken into consideration when the dosage is to be accurately ascertained.(Modified after Eockwell.)
Text Appearing After Image:
Fig. 26. -Deprez-DArsonval galvanometer.(Milliamperemeter.) 40 ELECTRO-THEEAPEUTICS. Methods of Application. There are two metliods of applying current to a part,—(1) stabileand (2) labile. (1) By the stahile method we mean the keeping of the electrodeson spots first ascertained, without moving them about in any direc-tion,—i. (?., the electrodes are retained in stationary positions. Afterascertaining the polarity, the sponges are carefully moistened, andit is then decided which pole is to be applied. After this has beendone the electrode is gently applied to the part, bearing upon it with aslight degree of pressure. The current is now turned on, beginningwith a minimum degree of current, and gradually increasing it byturning the lever of the rheostat 5 the amount of current applied de-pending upon the susceptibility of the patient. The current shouldnot be turned off suddenly, as this is liable to shock and induce fear inthe mind of the patient. The sudden reversal of the polarit