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Sphygmograph - Wikipedia
https://en.wikipedia.org/wiki/Sphygmograph
The sphygmograph ( / ˈsfɪɡməˌɡræf, ˌɡrɑːf / SFIG-mə-graf) 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.
A Sphygmograph for Continuous Tracings
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2198430/
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A Sphygmograph for Continuous Tracings - PubMed
https://pubmed.ncbi.nlm.nih.gov/20752528/
A Sphygmograph for Continuous Tracings
Sphygmograph Trace. By A. H. GARROD, of St. John's
https://www.jstor.org/stable/112940
It is generally known that in the sphygmograph traces of most slow pulses there is a notch in the first arterial interval, immediately preceding the major fall; and one of …
Sphygmograph invented by Karl von Vierordt in 1854
https://todayinsci.com/V/Vierordt_Karl/VierordtKarlSphygmograph.htm
Whereas earlier methods of measuring blood pressure had involved inserting a tube into an artery, the sphygmograph invented by Karl von Vierordt, in 1854, enabled the tracing of a human pulse by a non-invasive technique. He originated the important principle that blood pressure could be determined by measurement of the counter pressure that would suppress the pulse.
The sphygmograph | HKMJ
https://www.hkmj.org/abstracts/v22n4/402.htm
The sphygmograph in the collection of the Hong Kong Museum of Medical Sciences is a Dudgeon’s sphygmograph , a modification of the Marey sphygmograph by Dr Robert Ellis Dudgeon (1820-1904), a Scottish physician best known for his practice of homeopathy.5 The instrument was strapped on the wrist, and the weight on the lever could be adjusted to exert …
The Sphygmograph in America: Writing the Pulse
https://www.sciencedirect.com/science/article/pii/S0002914905019144
The sphygmographic tracings “exhibited great weakness of cardiac power.” To the modern eye, such self-experimentation conducted by an obviously impaired physician could have little validity. Holden concluded that “the nervous system was broken down by the excitement of reaction, a state lasting for 12 hours.”
The Heart and the Sphygmograph * | Nature
https://www.nature.com/articles/009327a0
The sphygmograph trace, as thus produced, gives indications in two directions; first, as to the action of the valves of the heart; and secondly, as to the …
Sphygmogram Definition & Meaning | Merriam-Webster …
https://www.merriam-webster.com/medical/sphygmogram
Medical Definition of sphygmogram. : a tracing made by a sphygmograph and consisting of a series of curves that correspond to the beats of the heart.
The Interpretation of the Primary and First Secondary …
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1289104/
The Interpretation of the Primary and First Secondary Wave in Sphygmograph Tracings. Journal List. J Anat Physiol. v.41 (Pt 2); 1907 Jan. PMC1289104. J Anat Physiol. 1907 Jan; 41 (Pt 2): 137–140. PMCID: PMC1289104.
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