Modification of Dudgeon sphygmograph with tambour dating from around 1890,England. This instrument is made of nickel and has a clockwork mechanism. The sphygmograph,originally invented in 1854 by German physiologist Karl von Vierordt,was used by physicians in the nineteenth century as a means of observing and measuring the pulse externally and non-invasively. A clockwork mechanism allows the pulse wave forms to be traced with a mounted pen | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 5455 px × 3601 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |