Parameter calibration method and parameter calibration system for continuously monitoring cardiac output

Abstract

The invention relates to the technical field of medical detection, and particularly relates to a parameter calibration method and a parameter calibration system for continuously monitoring cardiac output. The method comprises the steps of measuring a pulse wave data signal through a luminescent device; simultaneously connecting a vessel of a target to be measured by a conduit, and measuring the standard cardiac output; calculating the pulse wave data signal to obtain local blood flow; establishing a physiological model according to the mapping relation; after the physiological model is established, withdrawing the conduit connected with the vessel of the target to be measured, and transmitting two paths of optical signals with different wavelength to the vessel of the target to be measured via the luminescent device till a continuous pulse wave data signal is obtained; and adjusting the continuous pulse wave data signal according to the physiological model. According to the invention, the conduit does not need to be retained in the body of the patient for a long time, thereby reducing the operation complexity of the medical personnel, and reducing the pain of the patient and potential harm to the patient.

Description

technical field [0001] The invention relates to the technical field of medical detection and parameter calibration, in particular to a parameter calibration method and system for continuous monitoring of cardiac output. Background technique [0002] Cardiac output refers to the total amount of blood ejected from one side of the ventricle per minute, which is the product of heart rate and stroke volume, and is a key clinical indicator to describe the functional state of the cardiovascular system. In clinical practice, especially in the operating room, ICU, heart or vascular interventional treatment, cardiac output or stroke volume can help medical staff know the patient's cardiac function, and continuous monitoring of changes in cardiac output helps to obtain The real-time changes in cardiac output, so continuous monitoring and rapid response to cardiac output or stroke volume are particularly important. At present, there are many continuous measurement methods for cardiac o...

AI Technical Summary

Problems solved by technology

This method establishes a model between changes in vascular volume or blood flow and changes in thoracic impedance, but due to changes in thoracic impedance that may also be caused by body movement, breathing, mechanical ventilation, obesity, edema, etc., the accuracy is low; another example: Sphygmograph method, which is based on the analysis of the contour characteristics of the arterial pulse waveform, and calculates the cardiac output through the model between different waveforms and cardiac output

Because the pulse waveform contours of different patients are different, especially the abnormal pulse waveform contour caused by cardiovascular disease is also the reason for the difficulty of measurement by this method; therefore, non-invasive measurement methods are easily interfered by various factors, and most of them have low accuracy. ;

[0004]The minimally invasive method of continuously measuring cardiac output requires puncturing the catheter connected to the pressure sensor into the artery and staying in the human body for a long time. It is easy to cause injury to the patient and the operation is more complicated

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