Non-invasive continuous pulse blood pressure measurement method

Abstract

The invention relates to a noninvasive continuous blood pressure measurement method. The method comprises the following steps that 1, an arterial pressure signal sequence x[n] is obtained, a direct current component MeanValue is removed, and x1[n]=x[n]-MeanValue is obtained; 2, a remained alternating current component obtained after the direct current component is removed is scaled, and x2[n]=x1[n]*Kr is obtained; 3, the alternating current component obtained after scaling is conducted is added with a compensation direct-current component MeanValue', and a wave form is reduced to be an arterial pressure signal, namely, x'[n]=x2[n]+MeanValue'; 4, a maximum value max' and a minimum value min' of a pulse pressure sequence x'[n] are obtained, and systolic pressure SP=g(max') and diastolic pressure DP=g(min') are obtained respectively, wherein g(x) is a function relationship between the signal and the arterial pressure. Accordingly, by conducting direct current removing, scaling, reduction and other treatment on a blood pressure signal output by a pressure sensor, pressure loss occurs in the process that the blood pressure signal is transmitted to the pressure sensor by passing through tissue such as muscle tendon and skin is compensated, and the precision of blood pressure measurement is guaranteed.

Description

technical field [0001] The present application relates to the field of physiological parameter measurement, especially non-invasive continuous blood pressure measurement technology. Background technique [0002] Blood pressure is a basic vital parameter of the human body, and it is also a very important clinical monitoring element. In various medical treatment centers such as operating rooms, intensive care units, and emergency rooms, continuous blood pressure monitoring of patients is often required. Continuously measure the patient's arterial blood pressure in each cardiac cycle, reflecting the trend of blood pressure changes and instantaneous changes, so that medical staff can understand the condition in depth and comprehensively, and can make corresponding treatment in the first time, which is the key to ensuring medical safety basic condition. [0003] The importance of continuous blood pressure monitoring lies in: (1) For severe shock and critically ill patients who n...

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Problems solved by technology

[0006] In order to overcome the problem that the existing continuous non-invasive blood pressure measurement technology, especially the flat tension measurement technology, reduces the measurement accuracy caused by the pressure loss in the process of the blood pressure signal passing through the tendon, skin and other tissues to the pressure sensor, this application proposes a blood pressure measurement method, including:

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