Detection method of cardiac output under the high differential pressure and device thereof

A technology of cardiac output and large pressure difference, applied in blood flow measurement, special data processing applications, instruments, etc., can solve the problems of unsuitable for daily detection, high cost, and high detection cost.

Inactive Publication Date: 2007-08-01
BEIJING UNIV OF TECH
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Problems solved by technology

The catheter method is an invasive detection method, which is mainly used in operations and rescue of critically ill patients; the above-mentioned non-invasive methods are all used in hospitals, the cost of the instrument itself is high, and the detection cost is expensive, so it is not suitable for daily detection

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  • Detection method of cardiac output under the high differential pressure and device thereof
  • Detection method of cardiac output under the high differential pressure and device thereof

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Embodiment Construction

[0024] The sensor adopts a pressure sensor, such as a strain-type piezoelectric sensor or a polyvinylidene fluoride (PVDF) film sensor; the detection circuit includes a differential amplifier circuit and a second-order low-pass amplifier circuit, and the second-order low-pass amplifier circuit includes a second-order low-pass amplifier And digital potentiometers, second-order low-pass amplifiers use high-precision, single-supply, rail-to-rail surface-mount operational amplifier devices, such as a MCP6234 in SOIC14 package containing four operational amplifiers to complete the differential amplifier circuit and two The design of the second-order low-pass amplifier, the feedback circuit connected to the second-order low-pass amplifier to realize the adjustable gain adopts a digital potentiometer, and the digital potentiometer also adopts a surface-mounted device, such as X9313 in SOIC8 package, which is used to receive The control signal transmitted by the controller of the contr...

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Abstract

The invention discloses a heart output quantity detecting method and device under big pressure difference in the human body parameter detecting domain of biological medical engineer, which is characterized by the following: detecting heart rate (PR) of pressure pulse waveshape and pulse graph characteristic quantity K; mating blood pressure meter to measure systolic pressure Ps and diastolic pressure Pd; detecting heart output quantity CO according to Age. The device is composed of pressure pulse sensor, detecting circuit and main cell-phone control circuit.

Description

technical field [0001] The invention belongs to the field of human body parameter detection of biomedical engineering. By detecting the blood pressure of the living body (including the systolic blood pressure P s and diastolic pressure P d ), heart rate HR, age Age, and pulse chart characteristic quantity K to obtain a detection method and device for cardiac output CO under a large pressure difference. Background technique [0002] The use of pressure pulse waves to detect cardiac output has been studied since the 1960s. KH Wesseling proposed the elastic tube model in 1983, and designed a simple device for calculating cardiac output, but it could not reflect the influence of peripheral resistance, blood vessel elasticity and blood viscosity on physiological parameters. In 1988, Luo Zhichang et al. proposed A non-invasive, practical device suitable for all age groups, which takes into account the peripheral resistance, blood vessel elasticity and blood viscosity, and satis...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/029G06F19/00
Inventor 杨琳李达张松杨益民罗志昌
Owner BEIJING UNIV OF TECH
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