. Diseases of the heart and thoracic aorta. tracing; which result from CardiacExcitement.—Figs. 75 and 76 show two tracings from a case of : E. F., eet. 19, admitted to Newcastle-on-Tyne Infirmary 3d March1878. The tracing shown in fig. 75 was taken on 8th March ; the tracingshown in fig. 76 was made three minutes later, the instrument having re-mained in situ ; the heart had become excited. Pressure in both cases = 3 oz. 246 Diseases of the Heart. DIRECTIONS FOR THE APPLICATION OF DUDGEON SSPHYGMOGRAPH. Dr Dudgeon gives the following directions for theapplication of his instrum
. Diseases of the heart and thoracic aorta. tracing; which result from CardiacExcitement.—Figs. 75 and 76 show two tracings from a case of : E. F., eet. 19, admitted to Newcastle-on-Tyne Infirmary 3d March1878. The tracing shown in fig. 75 was taken on 8th March ; the tracingshown in fig. 76 was made three minutes later, the instrument having re-mained in situ ; the heart had become excited. Pressure in both cases = 3 oz. 246 Diseases of the Heart. DIRECTIONS FOR THE APPLICATION OF DUDGEON SSPHYGMOGRAPH. Dr Dudgeon gives the following directions for theapplication of his instrument:— I. Wind up the clockwork, used to drive the smoked paper along,by means of the milled button at the back of the clockwork box. 2. Insert one end of the smoked paper (smoked side uppermost) onthe right-hand side of the instrument, between the roller and smallwheels. 3. Make the patient hold out either hand open and in an easy posi-tion, the fingers pointing towards you (see fig. T]), and direct him notto move the wrist or Fig. 77—Mode of applying Diidgeon\: Sphygino;:;raph. 4. Ascertain the precise spot where the radial arter} beats at thewrist, close behind the eminence of the os trapezium. 5. Slip the band, the free end of which has been drawn through theclamp, over the paitents hand. 6. Apply pressure to the spring by turning the spring-regulator sothat the number of ounces, or portions of ounces, you wish, is pointed toby the indicator. The pressure may be altered at will when the instru-ment is fixed on the arm. Dudgeojis Sphygfiiograph. 247 7. Place the bulging button of the spring exactly over the artei-y, itslong axis parallel to the course of the artery, the box containing theclockwork resting lightly on the forearm above. 8. Retaining the instrument in its place with the left hand, drawthe band through the clamp with the thumb and forefinger of theright hand, holding back the clamp with the other fingers of that hand ;when the requisite tightness
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectheart, bookyear1884
