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Sphygmograph
The sphygmograph ( ) was a mechanical device used to measure blood pressure in the mid-19th century. It was developed in 1854 by German physiologist Karl von Vierordt (1818–1884). It is considered the first external, non-intrusive device used to estimate blood pressure. The device was a system of levers hooked to a scale-pan in which weights were placed to determine the amount of external pressure needed to stop blood flow in the radial artery. Although the instrument was cumbersome and its measurements imprecise, the basic concept of Vierordt's sphygmograph eventually led to the blood pressure cuff used today. In 1863, Étienne-Jules Marey (1830–1904) improved the device by making it portable. Also he included a specialized instrument to be placed above the radial artery that was able to magnify pulse waves and record them on paper with an attached pen. In 1872, Frederick Akbar Mahomed published a description of a modified sphygmograph. This modified version made the sphy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frederick Akbar Mahomed
Frederick Henry Horatio Akbar Mahomed (11 April 1849 – 22 November 1884) was an internationally known British physician from Brighton, England. Family and personal life Frederick Henry Horatio Akbar Mahomed was born on 11 April 1849 in Brighton. He was the eldest son of Frederick Mahomed (1818–1888) and his second wife, Sarah Hodgkinson (1816–1905). He was also the grandson of the pioneering Indian traveller, author and entrepreneur Sake Dean Mahomed. Frederick Akbar Mahomed's father, Frederick Mahomed, ran a fencing, gymnastics and callisthenics academy in Hove, which included boxing instruction. Cameron and Hicks dispute the suggestion that he ran Turkish baths at Brighton attributing this to a confusion of Mahomed's father Frederick with his uncle, Arthur. Mahomed had three brothers (Arthur George Suleiman, James Deen Kerriman and Henry), and one sister (Adeline). He was educated privately in Brighton prior to attending medical school. On June 14, 1873, at the pari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
