Continuous positive pressure ventilation device and ventilator

Abstract

The invention discloses a method, a device and a respirator for voltage stabilization of continuous positive pressure ventilation. The method comprises the following steps: receiving a flow rate of a respirable gas in a pressurized flow, which is measured by a flow sensor, according to a preset time interval; ensuring a second derivative of the flow rate of a preset time point; acquiring an average flow rate, air leakage, an inspiration tidal volume and inspiration time; judging whether the average flow rate is greater than the air leakage; if so, determining a gain value to be a product of a value of a quotient of the inspiration tidal volume divided by the inspiration time minus the air leakage and a first coefficient; if not, determining the gain value to be a product of a value of a quotient of the inspiration tidal volume divided by the inspiration time minus the air leakage and a second coefficient, wherein the first coefficient is greater than the second coefficient; determining a respiration vector which is a product of the gain value and the second derivative; and controlling a driving signal of a baseline configuration pressure generator on the basis of the respiration vector and a pressure generator. The method foresees a flow rate variation trend through the respiration vector, controls the flow rate of the current time point, and guarantees stable output pressure of the respirator.

Description

technical field [0001] The invention relates to the technical field of medical equipment, in particular to a device for continuous positive pressure ventilation and pressure stabilization and a ventilator including the device. Background technique [0002] CPAP stands for Continuous Positive Airway Pressure, which uses a mask to send continuous positive pressure airflow into the airway. The machine that gives oxygen in this way is called CPAP ventilator. Under spontaneous breathing conditions, the patient should have a stable respiratory driving force and an appropriate tidal volume, and artificially apply a certain degree of positive airway pressure throughout the breathing cycle, thereby helping to prevent airway collapse and increase functional residual volume. Improves lung compliance and increases oxygenation. [0003] However, the current patients are using CPAP ventilator, especially when the patient exhales and inhales, the sudden sudden change of gas flow rate caus...

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Problems solved by technology

[0003] However, the current patients are using CPAP ventilator, especially when the patient exhales and inhales, the sudden sudden change of gas flow rate causes the pressure to fluctuate sharply, the stability of CPAP ventilator pressure and the performance of the product, the therapeutic effect on the patient and the patient Tolerance of treatment stress, etc. has a great influence

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