A new sphygmomanometer / by G. A. Gibson.

Date:: 1909

Credit: A new sphygmomanometer / by G. A. Gibson. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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$Gib' in man by the kymograph on a few occasions during amputations. Faivre (lo) carried out investigations of this sort, but these must be condemned as absolutely unjustifiable. The first steps in the clinical estimation of the arterial pressure were made by Vierordt (ii), who employed his own sphygmograph, weighted in order to determine the^ amount of pressure necessary to obliterate the pulsation of the radial artery. Marey (12), Waldenburg (13), von Basch (14), Hoorweg (15), Potain (16), Hurthle (17), Bloch (18), Mosso (19), Oliver (20), Riva Rocci (21), Hill and Barnard {22), Gartner (23), Stanton (24), Cook (25), Erlanger (26), and Janeway (4) have, since his time, introduced different forms of clinical sphygmomano- meters, which may be classified either in respect of their mode of application, or as regards the principles of their construction. The sphygmomanometers of von Basch and Potain, as well as Oliver’s earlier instrument and the smaller instrument suggested by Hill and Barnard, estimate the pressure by application directly to the radial artery. The three first - mentioned register the pressure by means of an aneroid, and the other by the resistance of the air compressed in the upper part of the tube. The instru- ments of Riva Rocci, Stanton, Cook, Erlanger, and Janeway employ the method of circular compression of | a limb, so as to obliterate the lumen of one of the larger arteries and estimate the effects by examination of itself, or one of its branches, further from the heart; those of Marey, Hurthle, and Mosso act by embracing the ex- tremities after the manner of the plethysmograph. The tonometer of Gartner gauges the pressure, after com- pressing a finger, by the return of colour to the skin. It may be said at once that, with the exception of the sphygmomanometers which employ the method of circular, compression of one of the larger limbs, there is none which need be seriously discussed. The others only possess historic interest. The larger instrument of Hill 'd insfru yield a Tbei 8' ’ and the earlier appari llpressure is gauged by Istre believed to regii '[vessel; the theoi}'beir the vessel and th 'Attain their maximum, '5>roved by Hoivell ant ^illations indicate di Nraeter of Erlanger >^d>at of Riva Rocci, it is the earl of arterial pressu i>y Janew “iunin of air ^''apiiic rec there ,s no therefore „ .'Soli/'P begin IN Tf eide then T ^ '^ith t-, 3ve % 5lso Ofh, Prc, ?er eter adva %$

A new sphygmomanometer / by G. A. Gibson.

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