High-accuracy continuous non-invasive blood pressure measuring device with self-adaptation calibration function

Abstract

The invention belongs to the technical field of arterial blood pressure measurement, and discloses a high-accuracy continuous non-invasive blood pressure measuring device with the self-adaptation calibration function. A photoelectric sensor is adopted for detecting pulse waves, reverse bias voltage is provided for a light receiving tube, the sensitivity and stability of the light receiving tube are enhanced, quite weak pulse wave signals can be detected, and the waveform quality of the detected signals can be improved; a broadband filter is adopted, and it is ensured that pulse wave shapes are distortionless; due to the technologies, correcting variables can be correctly extracted from pulse waves. The device recognizes propagation time PTT related to systolic pressure and diastolic pressure from pulse waves, and extracts various variables according to pulse wave form changes to recognize various anomalous changes of self-adaptation correction PTT in real time; on the basis of an existing mathematic model, blood pressure can be measured in a high-accuracy, continuous and noninvasive mode under the complex clinic condition, and calibration and repeated standardization can be achieved not depending on conventional methods such as cuff oscillography.

Description

technical field [0001] The invention relates to the technical field of arterial blood pressure measurement, in particular to a high-accuracy continuous non-invasive blood pressure measurement device with an adaptive calibration function. Background technique [0002] Arterial blood pressure is one of the main indicators to reflect the state of the circulatory system and evaluate organ perfusion, and is an important vital sign parameter for perioperative monitoring. At present, the commonly used blood pressure monitoring methods in the perioperative period can be divided into invasive measurement and noninvasive measurement. Invasive measurement refers to the technology of placing special pipes into the body's circulatory system, converting mechanical potential energy into electronic signals through converters, and displaying blood pressure changes in real time on monitoring equipment. Invasive measurement methods can continuously and accurately measure stroke-per-stroke blo...

AI Technical Summary

Problems solved by technology

However, for parts of the human body with weak pulse signals such as toes, the sensitivity of this type of sensor is not high enough, resulting in large interference in the detected pulse wave and poor waveform quality. Increases the error in identifying PTT

In addition, traditional detection devices generally use narrow-band filters of 0.5 to 12 Hz to forcibly filter out respiratory interference, resulting in distortion of the detected pulse wave shape. This is feasible for oximeters that do not pay attention to the pulse wave shape, but Not suitable for studying the law of pulse wave shape changes

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