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On the Theory of the Sphygmograph

Published online by Cambridge University Press:  12 January 2017

Ernst Mach
Ernst Mach*
Affiliation:
Translated into English by Alexandre Métraux
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Extract

Many debates have already taken place on the reliability of the results obtained by means of sphygmographs. The following remarks may contribute to clarify some still unsettled points.

Type
Documents in Translation
Information
Science in Context , Volume 29 , Issue 4 , December 2016 , pp. 435 - 440
Copyright
Copyright © Cambridge University Press 2017 

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References

1 Müller's Archiv 1847, p. 242.

2 Die Lehre vom Arterienpuls, p. 11.

3 Medizinische Physik, p. 470.

4 What this says of course is only that the kymographion gives the period of the blood pressure, and not the shape of this period at the same time.

5 Die Lehre vom Arterienpuls, p. 15.

6 Marey in Brown-Sequard's Journal de physiologie 1959, vol. 2, p. 259, p. 420 – 1860 Avril n° X; in addition Chaveau [sic! instead of Cheveau] & Marey, Comptes rendus Jan. 6, 1862, p. 32 – Oct. 7, 1861, p. 622.

7 Mach on sphygmographs in Sitzungsbericht der kaiserl. Akademie 1862 April and Mach Compendium der Physik für Mediziner p. 149. There a general method is presented by means of which the true curve of the blood pressure is derived from the curve of the sphygmograph by means of a correction.

8 All these curves ought to be read from left to right.

9 Henle & Meissner, Jahresbericht über Anatomie und Physiologie 1859, p. 537.

10 The jagged lines in a, b, c, and d of figure 3 are thus due to the tube's oscillations; they are not inaccuracies, but rather signs of the instrument's exactitude.