A chest non-invasive blood pressure detection method based on pulse wave transit time

Abstract

The invention discloses a chest non-invasive blood pressure detection method based on pulse wave conduction time and belongs to the field of non-invasive blood pressure monitoring methods. The problemthat a time parameter, namely the blood pre-ejection period, is ignored in pulse wave conduction time PTT in traditional detection approaches is considered in the method, correspondingly the measurement position is fixed to an outlet of the thoracic aorta, the cardiac ejection period PEP is obtained through electrocardio signals ECG and aorta acceleration tracing signals APG, the influence of PEPin PTT is removed, the more accurate pulse wave conduction time PTT' is obtained, the detected conduction time is more proximate to the actual conduction time, and it is ensured that accurate aorta blood pressure can be obtained. Meanwhile, according to the method, by taking the defect that the accuracy of traditional non-invasive blood pressure detection is not ideal into consideration, a bloodpressure model is improved, and the heart rate HR, the pulse wave morphological parameter C and the skin conductance rho are added, so that a model fitting result is more accurate.

Description

technical field [0001] The invention belongs to the field of noninvasive blood pressure monitoring equipment, and in particular relates to a chest noninvasive blood pressure detection method based on pulse wave transit time. Background technique [0002] Blood pressure is one of the important physiological parameters reflecting the cardiovascular status of the human body. Human blood pressure is volatile, and continuous non-invasive blood pressure measurement can detect beat-by-beat arterial blood pressure, which is helpful for the prevention, diagnosis, treatment and control of cardiovascular diseases. The current non-invasive blood pressure detection technology is roughly divided into intermittent measurement and continuous measurement. Intermittent measurement methods include auscultation and oscillometric methods, which are characterized by high accuracy, but have high requirements for operators and can only obtain intermittent blood pressure values. Continuous measure...

AI Technical Summary

Problems solved by technology

[0003] The traditional blood pressure detection method based on pulse wave transit time has certain problems, including: only a single blood pressure index can be measured, frequent calibration is required, and the accuracy is not good

One of the reasons is that the traditional method ignores the vasoconstriction and dilation ability and the impact of PEP on blood pressure fluctuations before ejection, only relying on a single parameter of PTT to estimate blood pressure, it is impossible to track ambulatory blood pressure for a long time

In addition, the traditional method usually collects data from wrists, fingers, limbs, etc., which will result in the measured pulse wave transit time not only including the aortic pulse wave transit time which is linearly related to blood pressure, but also including cardiac radiation. Blood period, conduction time of radial artery or common carotid artery, and conduction time of local capillary ends, resulting in errors between detected blood pressure parameters and actual blood pressure parameters

In addition, the traditional detection device is bulky, complicated to use, the sensor is rigid and the gel electrodes are easy to cause skin allergies, causing inconvenience to users

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