Intravenous injection in wound shock : being the Oliver-Sharpey lectures delivered before the Royal College of Physicians of London in May 1918 . Spinal cord cut in upper lumbar region. Upper tracing—respiration by insertion of lever between liver and tracing—blood signal—10. a, Normal, b, Immediately after injury, c, Somewhat later. The rate has decreased, d, After massage of legs, e, Afterinjection of gum-saline. /, Two hours later. Blood pressure zero—bottom of figure. [2o face page 16. IN WOUND SHOCK 17 venient modification of the Riva-Rocci apparatus,known as
Intravenous injection in wound shock : being the Oliver-Sharpey lectures delivered before the Royal College of Physicians of London in May 1918 . Spinal cord cut in upper lumbar region. Upper tracing—respiration by insertion of lever between liver and tracing—blood signal—10. a, Normal, b, Immediately after injury, c, Somewhat later. The rate has decreased, d, After massage of legs, e, Afterinjection of gum-saline. /, Two hours later. Blood pressure zero—bottom of figure. [2o face page 16. IN WOUND SHOCK 17 venient modification of the Riva-Rocci apparatus,known as the Tycos sphygmomanometer (Fig. 6).This instrument is made by Messrs Short &Mason, 46a Holborn Viaduct. It is easily andrapidly applied. The manometer, being of themetallic gauge type, is easy to read, although forextreme accuracy, calibration against a mercury. Fig. 6.—Tycos Sphygmomanometer. Method of Auscultation. (By the kindness of Messrs Short & Mason.) manometer may be required at intervals. But thisis unnecessary for clinical purposes. It is probablybetter to use the auscultatory method for estimationof the systolic and diastolic pressures, but it appearsthat more reliance is to be placed on the interpretation of the Korotkov sounds at thediastolic level is, as yet, somewhat uncertain. Thedifference between the two pressures, the pulsepressure, is an index of the heart output, amongst 18 INTRAVENOUS INJECTION other things, and is valuable as a clinical (1918) has made a large number of measure-ments of this kind, and been able to deduce certainlaws. Oliver (1916, p. 9) describes a useful phonendoscope for the auditory method. It isto be obtained from Hawksley, 357 Oxford St. RAISING THE ARTERIAL PRESSURE The improvement of the blood supply by raisingthe arterial pressure being one of the most import-ant
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