[A spiroarteriocardiorhythmograph].
The design and principle of operation of a spiroarteriocardiorhythmograph are described. The device provides continuous noninvasive measurement of arterial pressure, detection of inhaled and exhaled air flows with a high-sensitivity ultrasonic spirometr, electrocardiogram detection, and joint analysis of these dynamal processes. Continuous measurement of pressure is performed by the method suggested by Penaz. The method is based on assessment of the volume of blood vessels of patient's finger from photoplethysographic signal. An electropneumatic follow-up system produces essure counteracting the changes in the diameter of arterial vessels patient's finger under the cuff. Thus, the diameter of the finger arteries remains constant, and the pressure in the cuff is equal to blood pressure in the arteries. This provides a unique opportunity for long-term detection of the entire curve of arterial pressure. Previously, such measurements could be performed only by the invasive Oxford technique.
Pivovarov
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D001794:Blood Pressure; D001795:Blood Pressure Determination / Q000295:instrumentation*; D003936:Diagnosis, Computer-Assisted; D011674:Pulse / Q000295:instrumentation*; D013147:Spirometry / Q000295:instrumentation*