Method for acquiring end expiration intravascular pressure wave data through expiratory apnea method

Abstract

The invention provides a method for acquiring end expiration intravascular pressure wave data through an expiratory apnea method. The method specifically comprises the following steps: for a patient with pure positive airway pressure, a breathing control device is started directly to enable a breathing machine to be in an expiratory apnea state, air supply of positive airway pressure is stopped, at the time, positive airway pressure is of an expiration phase, when the control device is stopped, the breathing machine supplies air normally, accordingly, variation is caused to vascular pressure wave, and the flat part before the variation is intravascular pressure end expiration point, so that the intravascular pressure wave of the expiration phase can be obtained; and for patient combining positive airway pressure with autonomous respiration, the breathing control device is enabled to be in a close state through being started at the end of autonomous inspiration, positive airway pressure is stopped to supply air, at the time, autonomous respiration of the patient and positive airway pressure of the breathing machine are both of an expiration phase, when the control device is stopped or autonomous respiration occurs, accordingly, variation is caused to vascular pressure wave, and the flat part before the variation is intravascular pressure end expiration point, so that end expiration intravascular pressure wave data can be obtained. The method is rapid and accurate in analysis, and the obtained intravascular pressure is closer to objective end expiration intravascular pressure. The method is high in clinical compliance and is particularly applicable to emergency department, anesthesia department, cardiology, department of cardiac surgery, ICU (Intensive Care Unit) and other departments where patients are required to be saved quickly.

Description

technical field [0001] The invention relates to a data processing method, in particular to a method for acquiring end-expiratory intravascular pressure waveform data by an expiratory pause method. Background technique [0002] In clinical practice, central venous pressure (CVP) has important significance. For example, the diagnostic criteria for acute lung injury / acute respiratory distress syndrome, the guidelines for the diagnosis and treatment of pulmonary hypertension, and the early target treatment of sepsis all use specific absolute values ​​of CVP. . However, no matter the above "absolute value" or "change value" must be based on a premise - the measured value is accurate. [0003] However, it is difficult to obtain accurate vascular pressure values ​​clinically. Because there are many factors that affect the accuracy of CVP. Position of the catheter tip, natural frequency and attenuation coefficient of the catheter-connecting tube-sensor measurement system, air bu...

AI Technical Summary

Problems solved by technology

[0005] At present, there is no special method to obtain the end-tidal intravascular pressure waveform. Clinically, it is only obtained through monitors and manual methods. Operators are difficult to comply with

At present, it is often only used for scientific research, and it is difficult to routinely carry out clinically

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