Practical electro-therapeutics and X-ray therapy - with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray (1912) (14570440058)

Identifier: practicalelectro00mart (find matches)

Title: Practical electro-therapeutics and X-ray therapy : with chapters on phototherapy, X-ray in eye surgery, X-ray in dentistry, and medico-legal aspect of the X-ray

Year: 1912 (1910s)

Authors: Martin, James Madison, 1866-1947

Subjects: Electrotherapeutics X-rays Diagnosis, Radioscopic Eye Electric Stimulation Therapy X-Ray Therapy Ophthalmologic Surgical Procedures

Publisher: St. Louis : C.V. Mosby

Contributing Library: Francis A. Countway Library of Medicine

Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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through the patients body during the treatment. (2) Spray or Breeze.—This modality is simply an increased orconcentrated leaking at some desired point arranged by the opera- 54 PRACTICAL ELECTRO-THERAPEUTICS AND X-RAY THERAPY tor. Fig. 22 illustrates the arrangement of the machine, patient,and electrode. The breeze or spray is always negative, and, whenthe patient is connected with the negative side of the machine,the electrons pass from the patient through the air space to theelectrode E and on through wire d to the ground. When the pa-tient M is connected to the positive side of the machine, the elec-trons will flow through the ground wire d to the electrode E andacross the air space to the patient 31. The patient M may bemade negative or positive, but the current itself is always negative.The electron theory teaches that an atom is made negative by addingmore than the normal amount of electrons to it, while it is madepositive by taking from it a number of its normal electrons. If

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Fig. 22.—Method of arrangement for the static spray. Patient negative. this is true of an atom, it must be true of a group of atoms, ormolecules or groups of molecules, or mass, no matter how great. Fig. 23 shows the patient connected to the positive side of themachine, and he becomes positive by having the electrons with-drawn from him by the action of the machine in making theprime conductor positive, and, since it is in metallic contact withthe patient M, he will be made positive by conduction. In eithercase the patient M must be insulated by placing him on a plat-form P. (3) Indirect Sparks.—The arrangement for the indirect sparkis the same as for the static spray, with the exception that in theindirect spark the electrode is a ball instead of a point. Figs. 24 ELECTROSTATICS 55 and 25 show the arrangement of the machine, electrode, and patientfor the indirect static spark, negative and positive. A good-sizedspark will pass between the patient M and the electrode E. Like KALEV

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1912

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