File:Studies in blood-pressure - physiological and clinical (1916) (14800216663).jpg

Identifier: studiesinbloodpr00oliv (find matches)
Title: Studies in blood-pressure : physiological and clinical
Year: 1916 (1910s)
Authors: Oliver, George, 1841-1915 Halliburton, W. D. (William Dobinson), 1860-1931
Subjects: Blood pressure Blood Pressure
Publisher: New York : Paul B. Hoeber
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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nimumquantity of tissue fluid. Besides affording a measure of the tissue-fluid inthe finger, I have found this method useful in givinga ready all-round estimate of the condition of the blood,by taking the mean of the two observations, e.g.— 92 after compression, 80 before „ = 86. These observations occupy but a few minutes ;and the practical advantages derived from them areconsiderable in at once settling the question of anaemia(in its broad sense), spanaemia and chlorosis ; and indetecting polycythemic or apoplasmic anaemia inwhich the blood is concentrated and therefore reducedin volume (see Blood and Blood-pressure, by G.Oliver, 1901, pp. 98-102). III. THE HiEMOGLOBINOMETER The method consists in comparing a specimen ofblood suitably diluted with water in a shallow whitepalette with a number of standard tests very carefullyprepared by the use of Lovibonds coloured glasses.The capillary pipette c (Fig. 10) is first filled withblood obtained by pricking the finger. This is washed
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Fig. 10.—Dr. George Olivers H^moglobinometer. a, Standard gradations ; b, lancet; c, capillary measuring pipette ; d, mixing pipette;e, blood cell and cover glass. 234 THE H^MOGLOBINOMETER 235 with water by the mixing pipette d into the blood-cell, e ; the cell is then just filled with water, andthe blood and water thoroughly mixed by the handleof c being used as a stirrer. The cover glass isthen adjusted, when a small bubble should form, aclear sign that the cell has not been overfilled. Thecell is then placed by the side of the standard grada-tions, and the eye quickly recognises its approximateposition on the scale. The camera tube providedwith the instrument will more accurately define it.Artificial light should be used. If it is proved thatthe blood solution is matched in depth of colour byone of the standard grades the observation is at anend ; but if the tint is higher than one grade, butlower than another, the blood cell is placed oppositeto the former, and riders (not shown

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