Cuff-free portable device for monitoring human physiological parameters and method

Abstract

The invention discloses a cuff-free portable device for monitoring a human physiological parameters and a method. An optical signal receiver inside a shell is connected with a signal amplifying module, a signal filtering module, an A / D conversion module and a singlechip in turn; the singlechip is externally connected with a data storage; a shell connecting strip is tied on the human wrist; and the surface of the shell is provided with a liquid crystal screen. A photoelectric detection module is arranged on the back of the shell and contacted with the body surface skin corresponding to the radial artery; a chip temperature sensor is arranged in the middle of the back of the shell and contacted with the wrist skin; the photoelectric detection module calculates the acquired human body pulse wave light volume description signals to acquire the parameter values of the human blood pressure, blood oxygen saturation, heart rate and respiratory frequency through the extraction of the signal characteristic time and calculation of a signal power spectrum; and a human body surface temperature signal is acquired by the temperature sensor. The cuff-free portable device for monitoring the human physiological parameters can non-invasively, comfortably, accurately display a plurality of human physiological parameters in real time.

Description

technical field [0001] The invention relates to a cuffless portable device and method for monitoring human physiological parameters, belonging to the monitoring device for human physiological parameters such as blood pressure, heart rate, respiratory rate, blood oxygen saturation and body temperature in the field of biomedical engineering. Background technique [0002] At present, the measurement of blood pressure can be divided into direct measurement and indirect measurement. Direct measurement is to directly insert a catheter connected with a pressure sensor into the aorta or ventricle to measure blood pressure. Although the blood pressure data measured by this method is the most accurate, it has high technical requirements and is traumatic, so it is not suitable for widespread use. Indirect measurement is to obtain blood pressure indirectly by detecting parameters such as the pulsation of the arterial wall and the change of blood vessel volume, which is simple and non-in...

AI Technical Summary

Problems solved by technology

"This patent uses one optical signal to measure blood pressure, which greatly reduces the discomfort of the monitored person during measurement, but the disadvantage of this patent is: this patent only conducts blood pressure measurement research, and does not measure pulse. Wave photoplethysmography signal is fully analyzed, and the processing module is relatively large and not portable

"The main disadvantage of this patent is that in order to obtain accurate blood vessel pressure parameters for the pressure sensor, the detector needs to press the device tightly on the surface of the radial artery of the human body. The force between the measuring device and the blood vessel hinders the flow of blood and causes discomfort to the person being measured

At the same time, changes in the pressure applied by the tester to the device will affect the value of blood pressure

[0009] In addition, Chinese patent, authorization announcement number: CN1698536A, authorization announcement date: November 23, 2005; Chinese patent, authorization announcement number: CN100502768C, authorization announcement date: June 24, 2009; Combined with the pulse wave photoplethysmography signal to calculate the blood pressure value of the human body. Due to the introduction of the ECG signal, an ECG measurement device needs to be added, which increases the complexity of the detection and is not convenient for portable use and long-term detection.

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