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A NEW SPHYGMOMANOMETER

Edward J. Brown, M.D.
JAMA. 1912;LIX(13):1192-1193. doi:10.1001/jama.1912.04270090436018.
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"A new sphygmomanometer" is getting to be almost as much of a joke as a new tonsil-knife or forceps, either of which latter generally means that the man behind the gun is not equal to the instruments previously in use. There is nothing new about the mercury manometer; it is simple enough, and so are the others, whether depending on a column of mercury [ill] compressed air or water and air or a long column of water in a rubber tube, provided they are standardized by comparison with the mercury column. The U tube mercury manometer is better than the straight tube, chiefly because the instrument may be shorter and less cumbersome and also because it is easier to determine the difference of the height in the twoarms of the U tube than in the straight tube and the reservoir. Probably, however, the personal elements which attach to the observer

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