Dr. bolchs sphygmometer, circa 1880
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Dr. bolchs sphygmometer, circa 1880
Bloch sphygmometer in its case dating from 1880. It was made in France by Charles Verdin. This was a compression device used for blood pressure measurement. The physician would place his finger over the patients pulse and with his other hand, the metal sphygmometer would be held at 45 degrees with the receiver end (a cork cushion) placed on his fingernail. Force would be applied down the length of the instrument onto the fingernail until the 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 patients blood pressure. The Bloch sphygmometer was soon replaced by more accurate instruments
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9232827
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1880 1880s Antique Apparatus Blood Pressure Boxed Cardiovascular Compression Cork Device Devices France French Instrument Instruments Measure Measurement Nineteenth Century Peach Background Pressure Pulse Radial Sphygmomanometer Sphygmometer Sphygmometry Bloch Blochs
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