CN115591068A - Method and system for testing maximum flow value of breathing machine - Google Patents

Method and system for testing maximum flow value of breathing machine Download PDF

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Publication number
CN115591068A
CN115591068A CN202111294329.XA CN202111294329A CN115591068A CN 115591068 A CN115591068 A CN 115591068A CN 202111294329 A CN202111294329 A CN 202111294329A CN 115591068 A CN115591068 A CN 115591068A
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flow
gas
value
pressure
reading
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CN202111294329.XA
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Chinese (zh)
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蓝芝福
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Resvent Medical Technology Co Ltd
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Resvent Medical Technology Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2209/00—Ancillary equipment
    • A61M2209/02—Equipment for testing the apparatus

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The application provides a method and a system for testing a maximum flow value of a breathing machine, wherein the method comprises the following steps: blowing gas to a patient connecting port connected with a breathing pipeline through a first gas source; adjusting the adjustable air resistance so that a reading of a first flow measurement device connected to the patient connection port reaches a preset flow value; recording a first pressure value of a pressure measurement device connected to the patient connection port at the time; disconnecting the first flow measuring equipment from the gas circuit, and adjusting the adjustable gas resistance to enable the reading of the pressure measuring equipment to be a second pressure value; replacing the first source of gas with a flow readable source of gas that blows gas into the breathing circuit such that the reading of the pressure measurement device remains at the second pressure value; and reading the reading of the gas source with the readable flow at the moment, namely obtaining the maximum flow value. Under the same test condition, the influence of the air resistance of the measuring equipment is eliminated, the known flow is output through the air source device, and the real flow is measured under the same pressure value.

Description

Method and system for testing maximum flow value of breathing machine
Technical Field
The present disclosure relates to ventilators, and particularly to a method and a system for testing a maximum flow rate of a ventilator.
Background
The respirator is a device which can replace, control or change the normal physiological respiration of a person, increase the lung ventilation, improve the respiratory function, reduce the consumption of the respiratory function and save the heart reserve capacity. In modern clinical medicine, a ventilator has been widely used in respiratory failure due to various reasons, anesthesia respiratory management during major surgery, respiratory support therapy and emergency resuscitation, can prevent and treat respiratory failure, reduce complications, save and prolong the life of a patient, and plays a crucial role in modern medicine.
As a critical medical device, the ventilator is directly applied to the human body, and thus the test work before being put into use is also important. Four basic parameters of ventilator testing include tidal volume, pressure, flow, and time, with the maximum flow value largely representing the performance of the ventilator. In the current test scheme, when the flow is measured under the condition of low pressure, the flow loss is caused by the intrinsic air resistance of the measuring equipment, and the final measurement result is obtained without eliminating the intrinsic air resistance of the measuring equipment. That is, since no measure is taken to eliminate the intrinsic air resistance of the apparatus, the influence of the intrinsic air resistance of the measuring apparatus itself on the actual value cannot be excluded when reading the measured maximum flow rate value, resulting in a limited and inaccurate result value.
Disclosure of Invention
In view of this, the present application provides a method and a system for testing a maximum flow value of a ventilator, which eliminate the influence of the air resistance of the measurement device under the same test condition, and output a known flow through an air source device to achieve the measurement of a real flow under the same pressure value.
The embodiment of the application provides a method for testing a maximum flow value of a breathing machine, which is characterized by comprising the following steps of: blowing gas to a patient connecting port connected with a breathing pipeline through a first gas source; adjusting the adjustable air resistance so that a reading of a first flow measurement device connected to the patient connection port reaches a preset flow value; recording a first pressure value of a pressure measurement device connected to the patient connection port at the time; disconnecting the first flow measuring equipment from a gas circuit, and adjusting the adjustable gas resistance to enable the reading of the pressure measuring equipment to be a second pressure value; replacing the first source of gas with a flow readable source of gas that blows gas into the breathing circuit such that the reading of the pressure measurement device remains at the second pressure value; and reading the reading of the flow readable gas source at the moment, namely the maximum flow value.
The embodiment of the present application still provides a maximum flow value test system of breathing machine, the system contains first air supply, breathing pipe, pressure measurement equipment, first flow measurement equipment, adjustable air resistance, pressure measurement equipment with first flow measurement equipment connects in patient connection port, its characterized in that: the first air source blows air to the patient connection port through the breathing tube; adjusting the adjustable air resistance to enable the reading of the first flow measuring equipment to reach a preset flow value; recording a first pressure value of the pressure measuring equipment at the moment; disconnecting the first flow measuring equipment from a gas circuit, and adjusting the adjustable gas resistance to enable the reading of the pressure measuring equipment to be a second pressure value; replacing the first source of gas with a flow readable source of gas that blows gas into the breathing circuit such that the reading of the pressure measurement device remains at the second pressure value; and reading the reading of the flow readable gas source at the moment, namely obtaining the maximum flow value.
The first gas source is a respirator, the flow readable gas source comprises a second gas source, a gas source connecting pipeline and a second flow measuring device, and the maximum flow value is a reading of the second flow measuring device.
The respirator is operated under 4cmH 2 The test was performed under O pressure conditions.
The second pressure value is reduced by 1cmH from the first pressure value 2 O。
The preset flow value is 40L/min.
The utility model provides a breathing machine maximum flow value test method and system under same test condition, has eliminated the influence of measuring equipment's air-resistor itself, simultaneously through the known flow of air supply unit output, keeps same pressure value as the reference at same position of same structure front end, converts the flow of originally unknown into the flow of knowing specific numerical value, realizes measuring true flow size under the same pressure value.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic diagram of a flow testing system 100.
FIG. 2 is a schematic view of a flow testing system with a flow measurement device removed.
FIG. 3 is a schematic view of a flow testing system in place of a flow readable gas source.
DESCRIPTION OF SYMBOLS IN THE DRAWINGS
Name of reference
100. Flow test system
1. Breathing machine
2. Breathing pipeline
3. Patient connection port
4. Pressure measuring device
5. Flow rate measuring device
6. Adjustable air resistance
7. Gas source
8. Air source connecting pipeline
The implementation, functional features and advantages of the object of the present application will be further explained with reference to the embodiments, and with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances, in other words that the embodiments described are to be practiced in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," or any other variation thereof, may also be used to cover other variations, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to only those steps or modules explicitly listed, but may include other steps or modules not explicitly listed or inherent to such process, method, article, or apparatus.
It should be noted that the descriptions relating to "first", "second", etc. in this application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
A flow measuring device is a measuring device that can measure pressure and flow volume. For flow measurement, due to the implementation principle, the intrinsic air resistance of the device cannot be eliminated, so that the actual value of flow measurement is lost and is not accurate enough.
The adjustable air resistance is a device which can change resistance by adjusting the size of a gap so as to control the flow of the passing gas.
The gas source is a gas output device which can meet the full range of the flow rate required to be measured and can realize coarse adjustment and fine adjustment.
Referring to fig. 1, fig. 1 is a schematic diagram of a flow measurement system 100, the flow measurement system 100 includes a ventilator 1, a breathing circuit 2, a patient connection port 3, a pressure measurement device 4, a flow measurement device 5, and an adjustable air resistance 6, the patient connection port 3 is connected to the pressure measurement device 4 for measuring a pressure value of air therein, and the flow measurement device 5 for measuring a flow rate of air flowing therethrough. The connection between the devices is shown in fig. 1.
First, the ventilator 1 is used as a gas source, ventilation is started at a predetermined pressure value, and a gas flow is blown out through the breathing pipe 2. The definition of a low pressure condition in the ventilator universal test standard is 4cmH 2 O, the present application is provided herein, but not limited thereto, and the present application can also be applied to 30cmH 2 Measurement under O pressure conditions.
The adjustable air resistance 6 is adjusted so that the flow measuring device 5 measures a flow of 40L/min, while the pressure value reading of the pressure measuring device 4 at this time is recorded.
The adjustable air lock 6 is then adjusted again so that the pressure value reading of the pressure measuring device 4 is reduced by 1cmH 2 And (O). In the existing test system, the reading of the flow rate measurement device 5 at this time is taken, which is the measured maximum flow rate value.
Although the pressure value of the pressure measuring device 4 is reduced by 1cmH in the reading by adjusting the adjustable air lock 6, this is a measure 2 O, but because of the presence of the air lock of the flow measuring device 5 itself, the exact pressure difference cannot be guaranteed in practice, thus leading to a situation in which the measurement result value is limited and inaccurate.
The system for testing the maximum flow rate of a ventilator according to the present application is improved based on the flow rate testing system 100 of fig. 1.
First, the ventilator 1 is used as a gas source at a predetermined pressure (e.g., 4 cmH) 2 O) starts the ventilation, blowing out a flow of gas via the breathing circuit 2. The adjustable air resistance 6 is adjusted so that the flow measuring device 5 measures a flow of 40L/min, while the pressure value reading of the pressure measuring device 4 at this time is recorded.
In order to eliminate the influence of the air resistance of the flow measuring device 5 itself on the accuracy of the pressure difference, the flow measuring device 5 is removed and the adjustable air resistance 6 is adjusted in the device connection condition as shown in fig. 2 so that the pressure value reading of the pressure measuring device 4 is reduced by 1cmH 2 O。
Maintaining the connection of the device at the patient port 3 in fig. 2 ensures that the same gas flow rate through the structure will result in the same resistance and pressure values for the gas flow. On the basis of fig. 2, the ventilator 1 is replaced by a flow readable gas source, which may in particular comprise a gas source 7, a gas source connection line 8 and a flow measuring device 5, as shown in fig. 3.
In FIG. 3, the air supply 7 blows the flow to the breathing circuit 6 and the patient side via the air supply connection 8, so that the pressure value of the pressure measuring device 4 is maintained at the same value as in FIG. 2, which is reduced by 1cmH 2 The readings after O were the same.
And reading the reading of the flow measuring device 5 at the moment, namely, the actually measured maximum flow value.
With reference to fig. 1-3, the present application further provides a method for testing a maximum flow value of a ventilator operating in an illustrative flow testing system, the method comprising the steps of:
blowing gas out of a patient connection port 3 connected to a breathing tube 2 through a respirator 1;
adjusting the adjustable air resistance 6 so that the reading of the flow measuring device 5 connected to the patient connection port 3 reaches a preset flow value, which may be 40L/min;
recording a first pressure value of the pressure measurement device 4 connected to the patient connection port 3 at the time;
disconnecting the flow measuring device 5 from the gas circuit and adjusting the adjustable gas resistance 6 such that the pressure measuring device 4 reads a second pressure value, the second pressure valueThe pressure value is reduced by 1cmH for the first pressure value 2 O；
Replacing the ventilator 1 with a flow readable gas source, wherein the flow readable gas source specifically comprises a gas source 7, a gas source connecting pipeline 8 and a flow measuring device 5;
the air source 7 blows flow to the breathing pipeline 6 and the patient end through the air source connecting pipeline 8, so that the pressure value of the pressure measuring equipment 4 is kept to be the same as the second pressure value;
the reading of the flow measuring device 5 at this time is taken, i.e. the maximum flow value.
This application utilizes the principle that gaseous characteristic is unanimous mutually, to same structural condition, the resistance size that unknown flow value produced is unanimous with the resistance size that known flow value produced, same position at same structure front end keeps same pressure value as the reference, will originally unknown flow, convert the flow into can know concrete numerical value, consequently can be under same test prerequisite, through the known flow of air supply unit output, realize measuring true flow size under the same pressure value.
Under 4cmH 2 Under the O pressure condition, the maximum flow value result measured by the test system can reach more than 2 times of the prior art to the maximum, and under different pressure conditions, the maximum flow value result measured by the scheme has different amplitudes of promotion. For example, at 4cmH 2 The maximum value of 185.6L/min under the pressure of O is far higher than the previous 60L/min, and the pressure is 30cmH 2 The measured maximum flow value also increased from 70L/min to 107L/min at O pressure, which is a significant improvement in ventilator performance.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
In the several embodiments provided in the present application, it should be understood that the disclosed system and apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the module is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be through some interfaces, indirect coupling or communication connection between devices or modules, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present application may be integrated into one processing module, or each module may exist alone, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application, which are essential or part of the technical solutions contributing to the prior art, or all or part of the technical solutions, may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, apparatus, article, or method that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, apparatus, article, or method. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of another identical element in a process, apparatus, article, or method comprising the element.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.

Claims (10)

1. The method for testing the maximum flow value of the breathing machine is characterized by comprising the following steps of:
blowing gas to a patient connecting port connected with a breathing pipeline through a first gas source;
adjusting the adjustable air resistance so that a reading of a first flow measurement device connected to the patient connection port reaches a preset flow value;
recording a first pressure value of a pressure measurement device connected to the patient connection port at the time;
disconnecting the first flow measuring device from the gas circuit, and adjusting the adjustable gas resistance to enable the reading of the pressure measuring device to be a second pressure value;
replacing the first source of gas with a flow readable source of gas that blows gas into the breathing circuit such that the reading of the pressure measurement device remains at the second pressure value;
and reading the reading of the flow readable gas source at the moment, namely the maximum flow value.
2. The method of claim 1 wherein the first source of gas is a ventilator, the source of readable gas flow comprises a second source of gas, a source connection, and a second flow measurement device, and the max flow value is a reading of the second flow measurement device.
3. The method of claim 2, wherein the ventilator operates at 4cmH 2 The test was performed under O-pressure conditions.
4. The method of claim 3, wherein the second pressure value is reduced by 1cmH from the first pressure value 2 O。
5. The method for testing the maximum flow rate of a ventilator according to claim 4, wherein the preset flow rate is 40L/min.
6. Maximum flow value test system of breathing machine, the system contains first air supply, breathing circuit, pressure measurement equipment, first flow measurement equipment, adjustable air resistance, pressure measurement equipment with first flow measurement equipment connects in patient connection port, its characterized in that:
the first air source blows air to the patient connecting port through the breathing pipe;
adjusting the adjustable air resistance to enable the reading of the first flow measuring equipment to reach a preset flow value;
recording a first pressure value of the pressure measuring equipment at the moment;
disconnecting the first flow measuring device from the gas circuit, and adjusting the adjustable gas resistance to enable the reading of the pressure measuring device to be a second pressure value;
replacing the first source of gas with a flow readable source of gas that blows gas into the breathing circuit such that the reading of the pressure measurement device remains at the second pressure value;
and reading the reading of the flow readable gas source at the moment, namely the maximum flow value.
7. The system for testing the maximum flow value of a ventilator of claim 6 wherein the first gas source is a ventilator, the flow readable gas source comprises a second gas source, a gas source connection line, and a second flow measurement device, and the maximum flow value is a reading of the second flow measurement device.
8. The system for testing maximum flow rate of a ventilator of claim 7, wherein said ventilator operates at 4cmH 2 The test was performed under O-pressure conditions.
9. The ventilator maximum flow value test system of claim 8, wherein the second pressure value is reduced by 1cmH from the first pressure value 2 O。
10. The ventilator maximum flow value test system of claim 9, wherein said preset flow value is 40L/min.
CN202111294329.XA 2021-07-08 2021-11-03 Method and system for testing maximum flow value of breathing machine Pending CN115591068A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110772298 2021-07-08
CN2021107722988 2021-07-08

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Publication Number Publication Date
CN115591068A true CN115591068A (en) 2023-01-13

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Application Number Title Priority Date Filing Date
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CN (1) CN115591068A (en)

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