. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . flating devices. The former (F) is ahollow rubber bag, 3i inches (8 cm.) wide and 16 inches long,closed at both ends, and prevented from expanding outwardby a cuff of double thick canvas, reinforced by tin strips. Aglass connecting tube is inserted at the centre of the rubber * See diagram page 57. The portion of artery ABC would not be com-pletely colla
. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . flating devices. The former (F) is ahollow rubber bag, 3i inches (8 cm.) wide and 16 inches long,closed at both ends, and prevented from expanding outwardby a cuff of double thick canvas, reinforced by tin strips. Aglass connecting tube is inserted at the centre of the rubber * See diagram page 57. The portion of artery ABC would not be com-pletely collapsed. » Stanton, W. B. Univ. of Penn. Med. Bull., 1903, vol, xv, p. 466. 88 THE MODERN SPHYGMOMANOMETERS bag by means of a hollow valve stem, such as is used for bi-cycle tires. This is connected by the stiff-walled rubber tube(G) with the manometer, which consists of a metal cistern(C) connected by a metal tube with the glass upright tube andscale (D), which can be unscrewed for carrying. The relativediaineters of cistern and column are 100 to 1, thus affordingan accurate zero point. The cistern (C) is covered by a screw-cap with a T-tube, one branch of which connects with thearmlet, the other with the bulb. At B is a screw valve for. Fig. 25.—Staktons sphygmomanometer.(Cut from The Arthur II. Thomas Co.) gradual release, at A a stop-cock to shut off the uses a single rubber bulb, such as is found on atom-izers, for the latter. To carry the apj^aratus, the bulb is removed from the T at 1and the cap 1 screwed in, cap 2 similarly closing the otherentrance 2, from which the armlet and tube G are discon-nected. The manometer is then tilted on its side until themercury has all run into the cistern, the upright glass tube isunscrewed, and its place filled by the cap 3. Special Technique.—The methods of - estimating systolicand diastolic pressures are the same as those described for theRiva-Rocci and Hill and Barnard instruments respectively. SYSTOLIC AND DIASTO
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbloodpr, bookyear1904
