. 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 . of 1876 he constructed hisapparatus, which in its origi-nal form is shown in Fig. two fundamental respectsit differed from all that hadpreceded it. One was theemployment of a bag con-taining fluid as the com-pressing mechanism, thusobtaining pressure per unitof surface for the first time;the other was the use of amercury manometer for them
. 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 . of 1876 he constructed hisapparatus, which in its origi-nal form is shown in Fig. two fundamental respectsit differed from all that hadpreceded it. One was theemployment of a bag con-taining fluid as the com-pressing mechanism, thusobtaining pressure per unitof surface for the first time;the other was the use of amercury manometer for themeasurement of the pressurewithin the bag necessary towholly compress the this way he made possiblea comparison of results withthe direct estimations of thephysiologist. The essential parts of theV. Basch sphygmomanome-ter are seen in the cut. B isthe so-called pelotte, origi-nally a glass funnel coveredwith an elastic membrane,only slightly stretched. The pelotte is connected with the ma-nometer (A) by non-distensible tubing and a T-canula (D).The vertical branch leads to a funnel (C), through which thepelotte and tubing are filled with water. At E is a pinch-cock,by which this communication can be cut off, after the mercury. Fio. 7.—V. Baschs model. DEVELOPMENT OF SPHYGMOMANOMETERS 47 has come to equilibrium and the zero point of the manometer hasbeen determined. The mode of apphcation is as follows: Anartery, temporal or radial, is selected, which Kes closely uponbone, and pressure is made over it with the pelotte, care beingtaken that the compression shall be directly against the the pressure is increased, water is forced out of the pelotteinto the closed arm of the manometer, which at each momentregisters the exact pressure exerted over the artery. Thepulse is felt with a finger of the opposite hand, just beyond
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbloodpr, bookyear1904
