. 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 . nstrument of this class which can be considered a modemsphygmomanometer, Ohvers hsemodynamometer employingthe faulty v. Basch method of compressing the artery. The Martin, Alfred. MUnch. med. Wochenschr., 1903, L, p. 1073. Hill, Leonard, and Barnard, Harold. British Med. Jour., 1897, vol. ii,p. 904. MEASURING DIASTOLIC PRESSURE 85 important parts, except
. 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 . nstrument of this class which can be considered a modemsphygmomanometer, Ohvers hsemodynamometer employingthe faulty v. Basch method of compressing the artery. The Martin, Alfred. MUnch. med. Wochenschr., 1903, L, p. 1073. Hill, Leonard, and Barnard, Harold. British Med. Jour., 1897, vol. ii,p. 904. MEASURING DIASTOLIC PRESSURE 85 important parts, except for the tj-pe of manometer used, areanalogous with those of the Riva-Rocci, and are seen inthe cut. Special Construction.—A. A delicate metal manometeror spring tambour. The dial is graduated in recent instru-ments from 30 to 250 mm. Hg., each subdivision representing2 mm. The needle magnifies considerably the oscillations ofthe pulse-wave. The stem of the manometer has a lateralbranch, to which the tube leading from the armlet is attachedby a screw-cap connection; and a straight branch, to whichthe pump is attached. B. The armlet consists of a hollow rubber bag, 5 cm. wideand about 20 cm. long, with the connecting tube (D) cemented. Fig. 24.—Hill and Barnards sphygmometer. into its centre. It is attached to an outer leather cuff whichbuckles around the arm. C. The inflating apparatus is a pump, like a hand bicyclepump. At E is a valve for the slow escape of the air. Method of Use.—The cuff is buckled snugly around thearm, with the same precautions as for the Riva-Rocci armlet,and with the outlet tube directed anteriorly. The pressure isthen raised slowly and steadily with the pump. Soon theneedle will be seen to pulsate. Its oscillations will increaseuntil they cover a number of millimeters of the scale, thengradually decrease as the pressure is further raised. Themanometer reading at which they first become most extensiveis taken. The pressure is then allowed to fall s
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbloodpr, bookyear1904
