WO2012089084A1

WO2012089084A1 - Method and device for calibrating peep valve

Info

Publication number: WO2012089084A1
Application number: PCT/CN2011/084670
Authority: WO
Inventors: 丛玉孟
Original assignee: 北京谊安医疗系统股份有限公司
Priority date: 2010-12-31
Filing date: 2011-12-26
Publication date: 2012-07-05
Also published as: CN102266631A

Abstract

A method and a device for calibrating PEEP valve are provided. The calibrating method comprises: obtaining a function between a control voltage value of the PEEP valve and a gas conduit pressure value of a breathing loop system, according to a plurality of groups of different control voltage values of the PEEP valve and the gas conduit pressure values of the breathing loop system corresponding to the control voltage values; adjusting the control voltage value of the PEEP valve according to the function in order to obtain an expected gas conduit pressure of the breathing loop system. By establishing a segmented linear plot of the function corresponding to the relationship between the control voltage and the gas conduit pressure values, the method and the device can adjust the control voltage of the PEEP valve according to the segmented linear plot of the function, thereby achieving precise control of the PEEP valve.

Description

PEEP valve calibration method and device

Technical field

The present invention relates to the field of medical devices, and in particular to a method and device for verifying a PEEP (Positive End-Expiratory Pressure) valve.

Background technique

The traditional PEEP valve calibration method is complex and requires professional tooling and equipment, and the calibration method is only applicable to the production process and is not applicable to the user's use site. When the anesthesia machine or ventilator is at the user's site of use and there is a deviation due to wear or other reasons, there is no suitable way to recalibrate the PEEP valve, so precise control of the PEEP valve is not possible.

Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method and apparatus for verifying a PEEP valve to at least solve the above-mentioned problem of re-calibrating the PEEP in a suitable manner at the site of use, thereby failing to achieve precise control of the PEEP valve.

According to an aspect of the invention, a method for verifying a PEEP valve is provided, comprising: obtaining a PEEP valve based on a control voltage value of a plurality of different PEEP valves and an airway pressure value of a respiratory circuit system corresponding to a control voltage value The control voltage value is a function of the airway pressure value of the breathing circuit system; the control voltage of the PEEP valve is adjusted according to a functional relationship to obtain the expected airway pressure of the breathing circuit system.

Further, according to the control voltage value of the plurality of different PEEP valves and the airway pressure of the breathing circuit system corresponding to the control voltage value, the control voltage value of the PEEP valve and the gas of the breathing circuit system are obtained. Before the function of the channel pressure value, the method further includes: obtaining a control voltage value of the plurality of different PEEP valves and an airway pressure value of the respiratory circuit system corresponding to the control voltage value.

Further, obtaining the control voltage values of the plurality of different PEEP valves and the airway pressure values of the breathing circuit system corresponding to the control voltage values include: closing the PEEP valve and opening the inhalation valve to inflate the breathing circuit system, when reaching a certain gas Stop the inflation and close the suction valve when the pressure value is set; Set the control voltage value of the PEEP valve. When the gas in the breathing circuit system reaches a stable level, measure the airway pressure value of the breathing circuit system; Repeat the above steps to obtain multiple groups. Different PEEP wide control voltage values and airway pressure values of the breathing circuit system corresponding to the control voltage values.

Further, a function between the control voltage value of the plurality of different PEEP valves and the airway pressure value of the breathing circuit system corresponding to the control voltage value is obtained as a function between the control voltage value of the PEEP valve and the airway pressure value of the breathing circuit system. The relationship includes: drawing a line graph of the relationship between the control voltage value and the airway pressure value based on the control voltage values of the plurality of different PEEP valves and the airway pressure values of the breathing circuit system corresponding to the control voltage values.

Further, adjusting the control voltage of the PEEP valve according to the functional relationship to obtain the expected airway pressure of the breathing circuit system comprises: obtaining a control voltage value corresponding to the expected airway pressure value according to the functional relationship piecewise straight line diagram; The control voltage value sets the control voltage of the PEEP valve.

Further, the airway pressure signal of the breathing circuit system is collected by an airway pressure sensor to obtain an airway pressure value of the breathing circuit system.

According to another aspect of the present invention, a control device for a PEEP valve is provided, comprising: a function relationship module for controlling a voltage value of a plurality of different PEEP valves and a gas of a breathing circuit system corresponding to a control voltage value The channel pressure value is a function of the control voltage value of the PEEP valve as a function of the airway pressure value of the breathing circuit system; an execution module for setting the control voltage of the appropriate PEEP valve according to a functional relationship to obtain the expected gas of the breathing circuit system Road pressure. Further, the apparatus further includes: an obtaining module, configured to acquire a control voltage value of the plurality of different sets of PEEP valves and an airway pressure value of the breathing circuit system corresponding to the control voltage value.

The invention has the following beneficial effects:

1. In the present invention, by constructing a linear relationship diagram of a functional relationship between the control voltage value and the airway pressure value, the control voltage of the PEEP valve can be adjusted according to the functional relationship of the segmentation line diagram to realize the PEEP valve. #青确控制.

2. In the present invention, the auxiliary tooling and equipment assistance are not required, and the line diagram can be automatically performed to verify the PEEP valve according to the obtained functional relationship.

DRAWINGS

The drawings described herein are provided to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a calibration method of a PEEP valve according to an embodiment of the present invention;

2 is a block diagram showing the structure of a calibration apparatus of a PEEP valve according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a check of a PEEP M according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

1 is a flow chart of a method for verifying a PEEP valve according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps: Step S102, according to the control voltage value of the plurality of different PEEP valves and the airway pressure value of the breathing circuit system corresponding to the control voltage value, the control voltage value of the PEEP valve and the airway pressure value of the breathing circuit system are obtained. The function relationship.

Step S104, adjusting the control voltage of the PEEP valve according to the function relationship to obtain the expected airway pressure of the breathing circuit system.

The step of obtaining the control voltage value of the plurality of different PEEP valves and the airway pressure value of the respiratory circuit system corresponding to the control voltage value is further included in the step S102. Specifically, the following acquisition manners may be adopted: first closing the PEEP The valve opens the inhalation valve to inflate the breathing circuit system. When a certain airway pressure value is reached, the inflation is stopped and the inhalation valve is closed. The control voltage value of the PEEP valve is set, and when the gas in the breathing circuit system reaches a stable level, the measurement is performed. The airway pressure value of the breathing circuit system; repeat the above steps to obtain the control voltage values of the different sets of PEEP valves and the airway pressure values of the breathing circuit system corresponding to the control voltage values.

Wherein, in the above step S102, a function relationship between the control voltage value and the airway pressure value is drawn according to the control voltage value of the plurality of different PEEP valves and the airway pressure value of the respiratory circuit system corresponding to the control voltage value. Segmented line graph.

Wherein, in the above step S102, adjusting the control voltage of the PEEP valve according to the function relationship to obtain the expected airway pressure of the breathing circuit system comprises: obtaining a control voltage corresponding to the expected airway pressure value according to the functional relationship segmentation line graph Value; Set the control voltage of the PEEP valve according to the obtained control voltage value.

2 is a structural block diagram of a calibration apparatus for a PEEP valve according to an embodiment of the present invention. As shown in FIG. 2, the method includes: an acquisition module 10, a function relationship module 20, and an execution module 30.

The obtaining module 10 is configured to obtain a control voltage value of the plurality of different PEEP valves and an airway pressure value of the breathing circuit system corresponding to the control voltage value. Function relationship module 20 and acquisition module 10 Connected, for controlling the voltage value of the PEEP valve and the gas of the breathing circuit system according to the control voltage value of the plurality of different PEEP valves acquired by the acquisition module 10 and the airway pressure value of the breathing circuit system corresponding to the control voltage value The functional relationship between the channel pressure values; the execution module 30 is coupled to the function relationship module 20 for adjusting the control voltage of the PEEP valve to obtain the expected airway pressure of the breathing circuit system based on the functional relationship obtained by the function relationship module 20.

3 is a schematic view showing the calibration of a PEEP valve according to an embodiment of the present invention. This embodiment describes a calibration procedure of a PEEP valve on the component structure of the anesthesia machine. As shown in FIG. 3, the anesthesia machine includes (others are not related to the present invention. The components are not shown): Inspiratory valve, PEEP, breathing circuit system, airway pressure sensor and main control section.

The gas enters the breathing circuit system from the inhalation valve and is exhaled from the PEEP valve. The airway pressure sensor collects the airway pressure value, while the main control portion controls the completion of the collection of the airway pressure sensor signal and completes the inhalation valve through the electrical signal. Control of the PEEP valve.

Among them, the PEEP wide verification process steps are as follows:

1. Close the PEEP valve and open the inspiratory valve to inflate the breathing circuit system of the anesthesia machine. When a certain airway pressure value is reached, stop inflation and close the inhalation valve. Then, the control voltage of the PEEP valve is set to U1 through the main control section, so that the PEEP valve is opened to allow the gas in the breathing circuit system to flow out. When the gas in the breathing circuit system reaches a certain degree of stability, the airway pressure value Pl is measured by the airway pressure sensor. This results in a set of control voltages U1 and corresponding airway pressure values P1.

2. Repeat step 1 to measure five different PEEP valve control voltages U2~U5. At the same time, different airway pressure values P2~P5 are obtained by the airway pressure sensor. Of course, in actual applications, the number of sets of required control voltage and airway pressure values can be determined as needed. Then use the above five groups of values to describe the functional line diagram of the PEEP valve control voltage corresponding to the airway pressure. The obtained functional relationship diagram is the PEEP valve calibration result, which results in a more accurate PEEP value. , to achieve more precise control of the anesthesia machine System.

Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for verifying a PEEP valve, comprising: obtaining a PEEP valve according to a control voltage value of a plurality of different PEEP valves and an airway pressure value of a breathing circuit system corresponding to the control voltage value The control voltage value is a function of the airway pressure value of the breathing circuit system; the control voltage of the PEEP valve is adjusted according to the functional relationship to obtain the expected airway pressure of the breathing circuit system.

2 . The method according to claim 1 , wherein the control voltage of the PEEP valve is determined according to a control voltage value of the plurality of different PEEP valves and an airway pressure of the breathing circuit system corresponding to the control voltage value Before the value is a function of the airway pressure value of the breathing circuit system, the method further includes: obtaining a control voltage value of the plurality of different sets of PEEP valves and an airway pressure value of the breathing circuit system corresponding to the control voltage value.

The method according to claim 2, wherein acquiring a control voltage value of the plurality of different PEEP valves and an airway pressure value of the breathing circuit system corresponding to the control voltage value comprises: closing the PEEP valve and Opening the inhalation valve to inflate the breathing circuit system, when a certain airway pressure value is reached, closing the inhalation valve to stop inflation; setting the control voltage value of the PEEP valve when the gas in the breathing circuit system reaches a stable level Measure the airway pressure value of the breathing circuit system; repeat the above steps to obtain a plurality of different control voltage values of the PEEP valve and airway pressure of the breathing circuit system corresponding to the control voltage value value.

4. The method of claim 1 wherein: according to a plurality of different sets of PEEP valves The control voltage value and the airway pressure value of the breathing circuit system corresponding to the control voltage value are obtained

The functional relationship between the control voltage value of the PEEP valve and the airway pressure value of the breathing circuit system includes: a control voltage value according to a plurality of different sets of PEEP valves and an airway pressure of the breathing circuit system corresponding to the control voltage value The value plots a piecewise straight line graph of the relationship between the control voltage value and the airway pressure value.

The method according to claim 4, wherein adjusting the control voltage of the PEEP valve according to the functional relationship to obtain an expected airway pressure of the breathing circuit system comprises: obtaining a line graph according to the function relationship The expected airway pressure value corresponds to a control voltage value; and the control voltage of the PEEP is set according to the obtained control voltage value.

6. Method according to claims 1-5, characterized in that the airway pressure signal of the breathing circuit system is gathered by an airway pressure sensor to obtain an airway pressure value of the breathing circuit system.

7. A calibration device for a PEEP valve, comprising: a function relationship module, configured to control a voltage value according to a plurality of different PEEP valves and an airway of a breathing circuit system corresponding to the control voltage value The pressure value is a function of the control voltage value of the PEEP valve as a function of the airway pressure value of the breathing circuit system; an execution module for adjusting the control voltage of the PEEP valve according to the functional relationship to obtain an expected airway of the breathing circuit system pressure.

The device according to claim 7, further comprising: an obtaining module, configured to acquire a plurality of different PEEP wide control voltage values and the control voltage Airway pressure value of the respiratory circuit system corresponding to the value