Digital reconstructing heart output instrument

Abstract

The impedance waveform reconstructing cardiac output instrument consists of a high frequency constant current source with crystal oscillator, a six-channel impedance detecting circuit, a Z0 temperature correcting circuit, a cardioelectric amplifier, a heart sound amplifier, a timing pulse generator, a A / D converting card, an isolating power source, a computer and corresponding measuring software. It can reconstruct impedance waveform, separate out different impedance components from the mixed impedance signal, draw corresponding waveform figures, measure, calculate, display and print ten cardiac function parameters automatically. The present invention is superior to available automatic cardiac function instrument.

Description

Technical field: [0001] The invention is a medical detection instrument for measuring ten left ventricular function indexes such as cardiac output by using reconstructed impedance cardiogram, belongs to the technical field of human body electrical bioimpedance information detection, and is specifically a digital reconstructed cardiac output instrument. Background technique: [0002] Cardiac output refers to the amount of blood discharged by the human heart per minute. The measurement methods are divided into two categories, invasive and non-invasive. The invasive methods include Fick method, dye dilution method, thermal dilution method, etc. These methods require insertion of a cardiac catheter into the heart, which has certain damage and risk to the human body, and is basically not used in clinical practice. Non-invasive methods include ultrasound, pulse mapping, and impedance methods. Among them, ultrasound and pulse mapping are basically not used clinically because of the larg...

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