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) (14570539709)

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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rallel the front verticalplane of the patients eyes, as shown in Fig. 208. A fresh 5x7 plate having previously been placed in the plate-holder, take it from the dark-room and place it in the tunnel, withits outer flange protruding, as shown in Fig. 208. This will exposeone-half of the plate to the action of the rays, while the other halfwill be protected for the second exposure. The localizer (Fig. 206)is now placed on the stand in front of the affected eye, its trigger isset, as already described, and, after the indicator ball has been 394 PRACTICAL ELECTRO-THERAPEUTICS AND X-RAY THERAPY adjusted to the plane of the cornea, the entire instrument is pushedforward on its base until the ball presses into the patients closedeyelid approximately its thickness; the trigger spring is then re-leased, and the indicator ball and cone recede exactly 10 millimeters,thereby permitting the patient to open his eyes and wink them in anatural manner. By referring to the localizer chart it will be ob-
Text Appearing After Image:
Eig. 208.—X-ray in eye surgery. Centering the tube. served that due allowance of 10 millimeters has been made by plac-ing the indicator ball and cone just that far removed from the frontplane of the cornea, and it should be borne in mind that the frontof the cornea is 10 millimeters in front of the shadow of the indi-cator ball, as shown in the negatives. Some object, such as a candle or a piece of white paper, that canbe readily seen by the patient, should be placed in alignment with X-RAY IN EYE SURGERY 395 the sights of the indicator, but several feet removed therefrom, andthe patient should be instructed to look constantly at this objectwhile the two exposures are being made. The first exposure shouldbe made with the light perpendicular to the plane of the plate andparallel with the patients eyes, thereby superimposing the shadowsof the indicator ball and cone and their supporting stems, as shownin Fig. 210 (1). The x-ray tube is then shifted toward the patientsfeet 4 or 5 inche