Method for improving working accuracy of PEEP valve

Abstract

The present invention provides a method for increasing the working precision of PEEP valve for settling the problem that the PEEP valve can not obtain high working precision, wherein the method comprises the following steps: inputting anticipated pressure value P1 into a processing unit (1) which obtains a corresponding current value I1 according to the stored comparison table and controls the PEEP valve (3) with the current value I1 to open the PEEP valve to a certain opening by an operator; detecting the airway pressure in the exhalation branch line by a pressure sensor (5) at the end of exhalation period and conveying the airway pressure value P2 to the processing unit (1); calculating a deviation value deltaP=P2-P1 by the processing unit (1) for determining whether the deviation value deltaP is in the anticipated control area, if not, obtaining an adjustment value P1' according to the relationship P1'=P1+deltaP*K, and in the relationship the adjusted scaling factor K is controlled between 0.4 to 0.9; and executing the steps repeatedly according to adjustment value until the deviation value is in the anticipated control area. The method can quickly and accurately increase the working precision of PEEP.

Description

technical field [0001] The present invention relates to how to more effectively apply a PEEP valve (Positive End-Expiratory Pressure, positive end-expiratory pressure ventilation device), that is, how to improve its working accuracy. Background technique [0002] The PEEP valve is mainly used in anesthesia machines and ventilators to facilitate breathing and ventilation for patients with lung lesions. The working principle of the PEEP valve is to control the opening pressure of the diaphragm by adjusting the magnitude of the current. The advantage of this valve is better linearity. The current usual method is to first calibrate the opening pressure of the diaphragm corresponding to each current point through testing, and obtain a corresponding table of pressure and current. Then, according to the desired pressure, look up the table to find the corresponding current value, and obtain the desired PEEP pressure through a given current. [0003] The disadvantage of the above ...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the above method is that the PEEP valve cannot achieve high working accuracy

Because in order to obtain high working accuracy, it is necessary to obtain a relatively fine corresponding table of pressure and current, which requires a lot of tedious testing

And to store this fine table value also requires a lot of storage space

At the same time, referencing this fine table value for calculation also requires a lot of system time and resources

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