Name/TitleEquipment: Mayer & Meltzer Sphygmograph
About this objectMayer & Meltzer sphygmograph. The sphygmograph is a small cardiography instrument which was used for the reading of a patient’s pulse. The device was designed to be strapped to the inside of a patient’s wrist, with the curved disc on the base of the sphygmograph pressed onto the skin. This rounded disc would transmit the pulse wave from arteries in the patient’s wrist into the vertical stem to which a needle is attached. The point of the needle would inscribe the curve of the pulse on a strip of carbonised paper, which was fed between two rollers. The needle would write horizontally at a high frequency of vibration, inscribing the rise and fall of the pulse. An eccentric was added to the lever to alter the pressure applied to the artery.
The sphygmograph was later replaced by electrocardiography.
Engraved “J. W.”
Date MadeCa 1880
Place NotesLondon, UK
Measurements6.3 x 3.6 x 5.7 mm