Dr. bolch's sphygmometer,circa 1880

Bildnummer 11655942
Dr. bolch's sphygmometer,circa 1880
Bloch sphygmometer dating from 1880 France. This was a compression device used for blood pressure measurement. The physician would place his finger over the patient's radial pulse and with his other hand,the metal sphygmometer would be held vertically with the receiver end (a cork cushion) placed on his fingernail. Downward force would be applied to instrument onto the fingernail until the radial pulse could no longer be felt. A spring dial would register the level of pressure required to stop the pulse on a numbered scale. This number would indicate the patient's blood pressure. The Bloch sphygmometer was soon replaced by more accurate instruments
Lizenzart: Lizenzpflichtig
Credit: Science Photo Library
Bildgröße: 3564 px × 5461 px
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