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Having need for a portable blood-pressure machine and not being satisfied with the instruments now on the market, we have had an apparatus made which we believe to be the most satisfactory and practical sphygmomanometer for clinical use that has yet been devised.
Our instrument is patterned after the Riva-Rocci, as used in the wards of the Johns Hopkins Hospital; this we have put into a compact, portable form, reducing the liability of breakage practically to nothing. The component parts of the apparatus are simple and inexpensive, therefore the cost of any necessary repairs would be trivial.
An explanation is hardly necessary, as the accompanying illustrations clearly show the instrument ready for use and closed for transporting. The manometer tube is in two sections, connected by a rubber cuff and the scale is hinged, the break occurring at the 195 mm. mark. In ordinary cases there is no need of
BEALL KH, MASON EM. PORTABLE BLOOD-PRESSURE APPARATUS.. JAMA. 1908;L(14):1121-1122. doi:10.1001/jama.1908.25310400033004a