Summary
A strain gauge which we designed was adapted to record arterial and venous pressure.
A natural vibration frequency of the moving parts of the transmitter in air was greater than 75 per sec. The damping factor of the liquid-filled system exceeded 1∶7.
The following facts indicate the sensitivity of the instrument: when a type MOB-5 loop was employed the deflection of the light spot on the loop oscillograph tape was 2.5 mm per mm Hg (arterial pressure gauge) and 6.4 mm of water (venous pressure gauge).
In addition provision was made for altering the sensitivity by changing the diaphragm in the gauge capsule.
A readily procurable Soviet strain gauge amplifier type TU-4M or TU-6M, which incorporated a carrier frequency generator, was employed to amplify the signal received from the output of the strain-gauge bridge.
The zero drift did not exceed 1–2 mm mercury during a period of 1 h.
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Osadchii, L.I., Levatov, V.A., Orlov, V.V. et al. A simple model tensometric electromanometer for recording intravascular pressure. Bull Exp Biol Med 57, 641–643 (1964). https://doi.org/10.1007/BF00782341
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DOI: https://doi.org/10.1007/BF00782341