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. 2014 Nov 5;308(3):F167–F178. doi: 10.1152/ajprenal.00503.2014

Fig. 1.

Fig. 1.

Scipione Riva-Rocci (left) described a practical method of determining systolic blood pressure using a mercury manometer and an inflatable cuff (middle) to determine the pressure (mmHg) needed to occlude the brachial artery and thus suppress the radial pulse. The photograph of Scipione Riva-Rocci (unknown photographer, 1896) is in the public domain according to the Danish Consolidated Act Copyright of 2010 (Danish National Archive). Nicolai Korotkoff (right) described the appearance and disappearance of sounds “just below the cuff” using a stethoscope, thus allowing for the measurement of diastolic pressure. He stated that “the absence of pulsations is not indicative that the artery is completely occluded. In this respect, our hearing is a better guide” (90, 132). The photograph of Nicolai Korotkoff (unknown photographer, 1900) is in the public domain according to article 1256 of the Civil Code of the Russian Federation. The photograph of the manometer is in the public domain because its copyright has expired; the original source is Korotkoff NS, Experiments for Determining the Strength of Arterial Collaterals. St. Petersburg, Russia: Imperial Military Medical Academy, 1910. Dissertation.