Method and device for controlling positive end-expiratory pressure

Abstract

The invention discloses a method and device for controlling positive end expiratory pressure. The method and device are applied to a respirator comprising a PEEP valve. The method comprises the steps that the step A, in the ith respiration period, a first detection value of the PEEP valve is obtained and in the (i+1)th respiration period, a second detection value of the PEEP valve is obtained; the step B, the first detection value and the second detection value are compared, a comparison result is obtained, if the comparison result is within an error range, the step C is executed, and if the comparison result is not within the error range, the step D is executed; the step C, a PEEP control value corresponding to the second detection value is obtained and the PEEP valve is controlled to move according to the PEEP control value; the step D, the PEEP control value corresponding to the second detection value is obtained, the PEEP control value is adjusted, the PEEP valve is controlled to move according to the adjusted value, and the adjusted value is set to be a PEEP control value corresponding to a detection value obtained in the next respiration period, wherein i is a positive integer. According to the method and device for controlling the positive end expiratory pressure, the PEEP valve can be accurately controlled.

Description

technical field [0001] The invention relates to the medical field, in particular to a control method and device for positive end-expiratory pressure. Background technique [0002] Ventilator is a device that can replace, control or change people's normal physiological breathing, increase lung ventilation, improve respiratory function, reduce breathing work consumption, and save heart reserve capacity. As a therapeutic medical device, the ventilator first needs to ensure the safety of the user. However, during the use of the ventilator, there may be accidents such as air source failure, airway pressure sampling failure, PEEP (positive end-expiratory pressure, positive end-expiratory pressure) valve damage, and exhalation valve leakage. Among them, PEEP can avoid early alveolar closure, expand alveoli, increase functional residual capacity, improve ventilation and oxygenation, and is a key control parameter of the ventilator. [0003] At present, the PEEP positive end-expira...

AI Technical Summary

Problems solved by technology

[0003] At present, the PEEP positive end-expiratory pressure setting value of many ventilators is open-loop control. Due to the inaccurate open-loop control, the PEEP positive end-expiratory pressure is unstable.

If the PEEP positive end-expiratory pressure is unstable, the ventilator will be triggered continuously and continue to supply air to the patient, causing the patient to choke and putting the patient at risk

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