Noninvasive continuous blood pressure measuring system and calibration method thereof

Abstract

The invention discloses a noninvasive continuous blood pressure measuring system and a calibration method thereof. When the system is started, a common least square method is used for carrying out initialization of a formula coefficient and a constant term, so that the system immediately has the capability of calculating correct non-invasive continuous blood pressure values; then, a recursion least square method is used in subsequent calibration. On the one hand, the technical barrier that if the recursion least square method is directly used, the time consumed for calculating convergence of the formula coefficient and the constant term is long in the starting process of the system is overcome, so that the system immediately has the capability of calculating the correct non-invasive continuous blood pressure values from the moment of starting; on the other hand, the defects that a blood pressure calculation formula obtained by only using the least square method cannot reflect common physiological conditions of a user and can only reflect the physiological conditions in a short time, influences of accidental errors of each time of intermittent blood pressure measurement are large, and the accuracy of continuous non-invasive blood pressure results cannot meet clinical requirements easily are overcome.

Description

technical field [0001] The invention relates to a noninvasive continuous blood pressure measurement system and a system calibration method when the measurement system is used to monitor blood pressure, belonging to the technical field of blood pressure monitoring. Background technique [0002] Blood pressure is one of the important physiological parameters of the human body, plays an important role in the diagnosis and treatment of various cardiovascular diseases such as hypertension, and is also an important item of daily health monitoring. The most commonly used blood pressure values ​​in clinical practice are systolic blood pressure and diastolic blood pressure. The currently commonly used non-invasive blood pressure monitoring is intermittent blood pressure monitoring based on the oscillometric method or the Korotkoff sound method. In addition to being unable to provide continuous blood pressure data, intermittent blood pressure monitoring also has the problem of discom...

AI Technical Summary

Problems solved by technology

However, the calibration of the pulse wave transit time method and the self-adaptation of the optimal filter belong to two different fields. So far, no recursive least squares method has been used in the calculation formula calibration of the pulse wave transit time method.

[0007] In summary, the pulse wave transit time method has great advantages over other non-invasive continuous blood pressure measurement methods, but the measurement system based on this method must properly solve the problem of system calibration, otherwise the measurement accuracy is difficult to meet clinical requirements

Images