CN111135412B - Pressure control method and device in breathing machine, breathing machine and storage medium - Google Patents
Pressure control method and device in breathing machine, breathing machine and storage medium Download PDFInfo
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- CN111135412B CN111135412B CN202010065365.8A CN202010065365A CN111135412B CN 111135412 B CN111135412 B CN 111135412B CN 202010065365 A CN202010065365 A CN 202010065365A CN 111135412 B CN111135412 B CN 111135412B
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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
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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
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
- A61M16/022—Control means therefor
- A61M16/024—Control means therefor including calculation means, e.g. using a processor
Abstract
The embodiment of the invention discloses a pressure control method in a breathing machine, which comprises the steps of obtaining a set pressure rise period; acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function; determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function; acquiring a target pressure value; determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and the pressure control proportion corresponding to the current rise time; the pressure of the breathing machine is controlled according to the current pressure value, so that the pressure of the breathing machine is accurately controlled, full gas exchange between bubbles in the lung of a patient and fresh gas is facilitated, the overshoot phenomenon caused by pressure control in the ventilation process of the breathing machine is eliminated, and the ventilation effect of the breathing machine is greatly improved. In addition, a pressure control device in a respirator, a respirator and a storage medium are also provided.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a method and a device for controlling pressure in a breathing machine, the breathing machine and a storage medium.
Background
In ventilator pressure control ventilation PCV mode, the onset of the pressure rise phase (i.e., slope phase) is an important performance indicator in PCV ventilation mode, which reflects the ability to quickly reach the target pressure within a set time during ventilation. The degree of speed of reaching the target pressure value can be controlled by adjusting the slope time. Then, in the current PCV control method, it is mainly the effect that the target pressure at each time point calculated using a linear slope rise within a specified rise time is input to the control unit for pressure control to finally reach the target set pressure. In view of the problem that the control pressure is linearly increased and the time to reach the target value is also long when the slope time is set long, which makes the patient unable to quickly obtain the ideal ventilation effect and reduces the clinical effect of the PCV ventilation mode in clinical use of the ventilator, there is a need to provide a new pressure control method in the pressure increasing stage of the ventilator.
Disclosure of Invention
In view of the above, it is desirable to provide a method and an apparatus for controlling pressure in a ventilator, and a storage medium, which can improve a ventilation effect of a user at a pressure rise stage of the ventilator.
A method of pressure control in a ventilator, the method comprising:
acquiring a set pressure rise period;
acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function;
determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function;
acquiring a target pressure value;
determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and a pressure control proportion corresponding to the current rise time;
and controlling the pressure of the breathing machine according to the current pressure value.
A pressure control device in a ventilator, the device comprising:
the first acquisition module is used for acquiring a set pressure rise period;
a second obtaining module, configured to obtain a preset pressure control function, where the pressure rise period is a parameter of the pressure control function, and the pressure control function includes: a sine function or a cosine function;
the first determining module is used for determining a pressure control proportion corresponding to the current rising time according to the pressure rising period and the pressure control function;
the third acquisition module is used for acquiring a target pressure value;
the second determination module is used for determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and the pressure control proportion corresponding to the current rise time;
and the control module is used for controlling the pressure of the breathing machine according to the current pressure value.
A ventilator comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of:
acquiring a set pressure rise period;
acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function;
determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function;
acquiring a target pressure value;
determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and a pressure control proportion corresponding to the current rise time;
and controlling the pressure of the breathing machine according to the current pressure value.
A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
acquiring a set pressure rise period;
acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function;
determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function;
acquiring a target pressure value;
determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and a pressure control proportion corresponding to the current rise time;
and controlling the pressure of the breathing machine according to the current pressure value.
According to the pressure control method and device in the breathing machine, the breathing machine and the storage medium, the set pressure rise period is obtained; acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function; determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function; acquiring a target pressure value; determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and the pressure control proportion corresponding to the current rise time; the pressure of the breathing machine is controlled according to the current pressure value, so that the pressure of the breathing machine is accurately controlled, full gas exchange between bubbles in the lung of a patient and fresh gas is facilitated, the overshoot phenomenon caused by pressure control in the ventilation process of the breathing machine is eliminated, and the ventilation effect of the breathing machine is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a flow diagram of a method for pressure control in a ventilator in one embodiment;
FIG. 2 is a flow chart of a pressure control ratio determination method in one embodiment;
FIG. 3 is a graph of a function of a pressure control function in one embodiment;
FIG. 4 is a graph of a function of a pressure control function in another embodiment;
FIG. 5 is a functional graph of a pressure control function in yet another embodiment;
FIG. 6 is a flowchart of a pressure control ratio determination method in another embodiment;
FIG. 7 is a flow chart of a method of pressure control in a ventilator in accordance with another embodiment;
FIG. 8 is a block diagram of a pressure control device in a ventilator in accordance with one embodiment;
FIG. 9 is a block diagram showing the construction of a pressure control device in a ventilator according to another embodiment;
fig. 10 is a block diagram of a ventilator in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
As shown in fig. 1, in one embodiment, there is provided a method of controlling pressure in a ventilator, which is applied to a ventilator. The pressure control method in the breathing machine specifically comprises the following steps:
The pressure rise period refers to a rise time of the ventilator in the PCV mode for normal ventilation, and may be set to 0.2S (seconds), 1S (seconds), 2S (seconds), or the like, without limitation. By setting the pressure rising period, the pressure can be ensured to be in a rising change trend in the pressure rising period.
Wherein, the preset pressure control function is a preset curve expression for describing the pressure change track of ventilation in the pressure rising stage of the ventilator, because the pressure rising period can affect the pressure maintaining rising time of the ventilator in the pressure rising stage, the pressure rising period is taken as the parameter of the control function, namely, the pressure control function can change along with the pressure rising period, namely, the pressure control function is set by using the pressure rising period, so as to ensure that the pressure of the ventilator is in the rising change trend in the pressure rising period, the ventilator controlling the pressure by the pressure control function is beneficial to the sufficient gas exchange between the air bubbles in the lung of the patient and the fresh gas, and the ventilation effect of the ventilator is improved, specifically, the sine function or the sine function is a periodic function, and is a monotonic function and has an increasing function in any one quarter of the cosine periods, in this embodiment, the pressure upper body period time may be set to be less than a quarter period of a sine function or a cosine function, and set to be a monotonically increasing interval, so as to ensure that the function value of the pressure control function, i.e. the pressure of the ventilator, has a rising trend in one pressure rising period. Furthermore, the sine function or the cosine function is a quadratic differentiable function, so that the pressure is kept smooth when the pressure approaches or reaches a pressure rising period, sudden change can not occur, and the overshoot phenomenon of pressure control in the ventilation process of the respirator is eliminated.
And 106, determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function.
The pressure control proportion is a ratio of a function value of the pressure control function in the current rise time to a pressure value corresponding to the current rise time, and is used for reflecting a proportional relation between the function value of the pressure control function corresponding to the current rise time and the pressure value. It is to be understood that the pressure control function is a function describing a change in pressure with time during a pressure rise period, and since an argument of the function is time, a resulting function value is time-dependent, and in order to convert the function value into a pressure value, a pressure control ratio needs to be determined, and the pressure control ratio can be determined by determining the pressure rise period and the pressure control function. Specifically, the ratio of the function value of the pressure control function at the current rise time to the target pressure value corresponding to the current rise time is calculated, and the obtained result is the pressure control ratio.
And step 108, acquiring a target pressure value.
Wherein, the eyesThe standard pressure value refers to the pressure required by ventilation in the pressure rising stage of the breathing machine, and can be set according to the application scene of the breathing machine. For example, the target pressure value may be set to 15cmH2O、12cmH2O or 10cmH2O, and the like.
And step 110, determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and the pressure control proportion corresponding to the current rise time.
The current pressure value refers to a pressure value corresponding to the current rise time, that is, a pressure value that needs to be output by the ventilator at the current rise time, and specifically, a result obtained by multiplying the target pressure value by the pressure control ratio is the current pressure value.
And step 112, controlling the pressure of the breathing machine according to the current pressure value.
Specifically, the change trajectory of the current pressure value is used as the pressure change trajectory of the ventilator, the pressure of the ventilator is controlled according to the pressure change trajectory, and a PID controller may be used to perform pressure control. It can be understood that, because the change track of the current pressure value has the characteristics of continuous rising and smoothness when approaching and reaching the target pressure through the pressure control function in the step 104, the pressure of the breathing machine is controlled according to the current pressure value, the pressure of the breathing machine can be accurately controlled, sufficient gas exchange between bubbles in the lung of a patient and fresh gas is facilitated, the overshoot phenomenon of pressure control in the ventilation process of the breathing machine is eliminated, and the ventilation effect of the breathing machine is greatly improved.
It should be noted that after the pressure rising period is reached, that is, during the process after the pressure rising period, the pressure of the ventilator is controlled according to the target pressure value, so as to further ensure the ventilation effect of the ventilator.
According to the pressure control method in the breathing machine, the set pressure rise period is obtained; acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function; determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function; acquiring a target pressure value; determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and the pressure control proportion corresponding to the current rise time; the pressure of the breathing machine is controlled according to the current pressure value, so that the pressure of the breathing machine is accurately controlled, full gas exchange between bubbles in the lung of a patient and fresh gas is facilitated, the overshoot phenomenon caused by pressure control in the ventilation process of the breathing machine is eliminated, and the ventilation effect of the breathing machine is greatly improved.
As shown in fig. 2, in one embodiment, determining the pressure control ratio corresponding to the current rise time according to the pressure rise period and the pressure control function includes:
and step 106B, determining the pressure control proportion corresponding to the current rise time according to the function value.
In this embodiment, when the current rise time is less than or equal to the pressure rise period, i.e., during the period of the pressure rise time, the function value of the pressure control function is calculated according to the current rise time, and then the ratio of the function value to the pressure value of the ventilator at the current rise time is used as the pressure control ratio. For example, the current rise time is 0.2S, the function value at this time is 1, and the pressure value of the ventilator at the current rise time is 15cmH2O, the pressure control ratio is
In one embodiment, obtaining a preset pressure control function, where a pressure rising period is a parameter of the pressure control function, and the pressure control function is a sine function or a cosine function, includes:
when the pressure control function is a sine function, the pressure control function expression is:
where slope (T) is expressed as an expression for the pressure control function, T0Expressed as the pressure rise period, t as the current rise time, a1、b1、c1Respectively expressed as a first sinusoidal adjustment parameter, a second sinusoidal adjustment parameter, a third sinusoidal adjustment parameter.
In this embodiment, for example, when the first sinusoidal adjustment parameter, the second sinusoidal adjustment parameter, and the third sinusoidal adjustment parameter are respectively
b1＝1，
T0The plot of slope (t) function at 0.2S is shown in fig. 3, and it can be seen from fig. 3 that the function value of the pressure control function continues to rise, and that the pressure near or at the pressure rise period remains smooth and does not change abruptly. For another example, when the first sinusoidal adjustment parameter, the second sinusoidal adjustment parameter, and the third sinusoidal adjustment parameter are respectively
b1＝1，
T0The plot of slope (t) for 2S is shown in fig. 4, and it can be seen from fig. 4 that the function value of the pressure control function continues to rise, and that the pressure near or at the pressure rise period remains smooth and does not change abruptly. Furthermore, when the pressure rising period rises and changes, the pressure rising speed corresponding to the function diagram changes, but the function value of the pressure control function continuously rises, and the pressure close to or reaching the pressure rising period is kept smooth and does not change suddenly, which is beneficial to ensuring the ventilation effect of the breathing machine.
In one embodiment, obtaining a preset pressure control function, where a pressure rising period is a parameter of the pressure control function, and the pressure control function is a sine function or a cosine function, includes:
when the pressure control function is a cosine function, the pressure control function expression is:
where slope (T) is expressed as an expression for the pressure control function, T0Expressed as the pressure rise period, t as the current rise time, a2、b2、c2Respectively expressed as a first cosine adjusting parameter, a second cosine adjusting parameter, and a third cosine adjusting parameter.
In this embodiment, when the first cosine adjustment parameter, the second cosine adjustment parameter and the third cosine adjustment parameter are a2＝1，b2＝1，
T0The plot of slope (t) for 1S is shown in fig. 5, and it can be seen from fig. 5 that the function value of the pressure control function continues to rise, and that the pressure near or at the pressure rise period remains smooth and does not change abruptly.
As shown in fig. 5, in one embodiment, determining the pressure control ratio corresponding to the current rise time according to the pressure rise period and the pressure control function includes:
and 106D, acquiring a preset pressure proportion adjusting parameter, and calculating according to the pressure proportion adjusting parameter and the initial proportion value to obtain a pressure control proportion.
In this embodiment, the initial proportional value refers to a coefficient of the pressure control function, and the initial proportional value corresponding to the current rise time can be obtained by calculation according to the pressure rise period and the pressure control function. The preset pressure ratio adjusting parameter is used for adjusting the phase corresponding to the current rising time. After the coefficient of the pressure control function and the phase value corresponding to the current rise time are determined, the function value is calculated, the pressure control proportion is determined according to the function value, and the accuracy of calculation of the pressure control proportion is improved.
As shown in fig. 7, in one embodiment, controlling the pressure of the ventilator according to the current pressure value includes:
and step 112B, controlling the pressure of the breathing machine according to the target duty ratio control value.
In this embodiment, the PID controller is a controller composed of a proportional unit P, an integral unit I, and a derivative unit D, and has the advantages of simple implementation, flexible control, and the like, the target duty ratio control value is the duty ratio of PWM output by the PWM output terminal in the controller, and the pressure of the ventilator is controlled according to the target duty ratio control value, and the pressure control effect of the ventilator is improved by making full use of the characteristics of simple PID control and good control effect.
As shown in fig. 8, in one embodiment, there is provided a pressure control apparatus in a ventilator, including:
a first obtaining module 802, configured to obtain a set pressure rise period;
a second obtaining module 804, configured to obtain a preset pressure control function, where the pressure rising period is a parameter of the pressure control function, and the pressure control function includes: a sine function or a cosine function;
a first determining module 806, configured to determine a pressure control ratio corresponding to a current rise time according to the pressure rise period and the pressure control function;
a third obtaining module 808, configured to obtain a target pressure value;
a second determining module 810, configured to determine, according to the target pressure value and the pressure control ratio corresponding to the current rise time, a current pressure value corresponding to the current rise time of the ventilator;
and a control module 812, configured to control the pressure of the ventilator according to the current pressure value.
As shown in fig. 9, in one embodiment, the first determining module 806 includes:
a first calculating unit 806A, configured to, when the current rise time is less than or equal to the pressure rise period, use the current rise time as an argument of the pressure control function, and calculate a function value corresponding to the current rise time;
the first determining unit 806B is configured to determine a pressure control ratio corresponding to the current rise time according to the function value.
In one embodiment, the second obtaining module includes a first obtaining unit, configured to, when the pressure control function is a sine function, obtain the pressure control function expression as:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise period, t is expressed as said current rise time, a1、b1、c1Respectively expressed as a first sinusoidal adjustment parameter, a second sinusoidal adjustment parameter, a third sinusoidal adjustment parameter.
In one embodiment, the second obtaining module includes a second obtaining unit, configured to, when the pressure control function is a cosine function, obtain the pressure control function expression as:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise period, t is expressed as said current rise time, a2、b2、c2Respectively expressed as a first cosine adjusting parameter, a second cosine adjusting parameter, and a third cosine adjusting parameter.
In one embodiment, the control module includes a second determination unit and a control unit.
The second determining unit is used for determining a preset target duty ratio control value of the PID controller according to the current pressure value;
and the control unit is used for controlling the pressure of the breathing machine according to the target duty ratio control value.
In one embodiment, the first determination module includes a second calculation unit and a third calculation unit.
The second calculation unit is used for calculating an initial proportion value corresponding to the current rising time according to the pressure rising period and the pressure control function;
and the third calculating unit is used for acquiring a preset pressure proportion adjusting parameter and calculating the pressure control proportion according to the pressure proportion adjusting parameter and the initial proportion value.
Fig. 10 shows an internal structure of a ventilator in one embodiment. The ventilator may be embodied as a server including, but not limited to, a high performance computer and a cluster of high performance computers. As shown in fig. 10, the ventilator includes a processor, memory, and a network interface connected by a system bus. Wherein the memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the ventilator stores an operating system and may also store a computer program which, when executed by the processor, causes the processor to implement the method of pressure control in a ventilator. The internal memory may also have stored thereon a computer program that, when executed by the processor, causes the processor to perform a method of pressure control in a ventilator. It will be appreciated by those skilled in the art that the configuration shown in figure 10 is a block diagram of only a portion of the configuration associated with the subject application and does not constitute a limitation on the ventilator to which the subject application is applied, and that a particular ventilator may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the method for controlling pressure in a ventilator provided by the present application may be implemented in the form of a computer program that is executable on a ventilator as shown in fig. 10. The memory of the ventilator may store therein the various program templates that make up the ventilator. For example, the first obtaining module 802, the second obtaining module 804, the first determining module 806, the third obtaining module 808, the second determining module 810, and the control module 812.
A ventilator comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the following steps when executing the computer program: acquiring a set pressure rise period; acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function; determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function; acquiring a target pressure value; determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and a pressure control proportion corresponding to the current rise time; and controlling the pressure of the breathing machine according to the current pressure value.
In one embodiment, determining the pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function comprises: when the current rising time is smaller than or equal to the pressure rising period, taking the current rising time as an independent variable of the pressure control function, and calculating to obtain a function value corresponding to the current rising time; and determining the pressure control proportion corresponding to the current rise time according to the function value.
In one embodiment, obtaining a preset pressure control function, where the pressure rising period is a parameter of the pressure control function, and the pressure control function is a sine function or a cosine function, includes: when the pressure control function is a sine function, the pressure control function expression is:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise period, t is expressed as said current rise time, a1、b1、c1Respectively expressed as a first sinusoidal adjustment parameter, a second sinusoidal adjustment parameter, a third sinusoidal adjustment parameter.
In one embodiment, obtaining a preset pressure control function, where the pressure rising period is a parameter of the pressure control function, and the pressure control function is a sine function or a cosine function, includes: when the pressure control function is a cosine function, the pressure control function expression is as follows:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise period, t is expressed as said current rise time, a2、b2、c2Respectively expressed as a first cosine adjusting parameter, a second cosine adjusting parameter, and a third cosine adjusting parameter.
In one embodiment, controlling the pressure of the ventilator according to the current pressure value comprises: determining a preset target duty ratio control value of the PID controller according to the current pressure value; and controlling the pressure of the breathing machine according to the target duty ratio control value.
In one embodiment, determining the pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function comprises: calculating to obtain an initial proportional value corresponding to the current rise time according to the pressure rise period and the pressure control function; and acquiring a preset pressure proportion adjusting parameter, and calculating according to the pressure proportion adjusting parameter and the initial proportion value to obtain the pressure control proportion.
A computer-readable storage medium storing a computer program, the computer program when executed by a processor implementing the steps of: acquiring a set pressure rise period; acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function; determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function; acquiring a target pressure value; determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and a pressure control proportion corresponding to the current rise time; and controlling the pressure of the breathing machine according to the current pressure value.
In one embodiment, determining the pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function comprises: when the current rising time is smaller than or equal to the pressure rising period, taking the current rising time as an independent variable of the pressure control function, and calculating to obtain a function value corresponding to the current rising time; and determining the pressure control proportion corresponding to the current rise time according to the function value.
In one embodiment, obtaining a preset pressure control function, where the pressure rising period is a parameter of the pressure control function, and the pressure control function is a sine function or a cosine function, includes: when the pressure control function is a sine function, the pressure control function expression is:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise period, t is expressed as said current rise time, a1、b1、c1Respectively expressed as a first sinusoidal adjustment parameter, a second sinusoidal adjustment parameter, a third sinusoidal adjustment parameter.
In one embodiment, obtaining a preset pressure control function, where the pressure rising period is a parameter of the pressure control function, and the pressure control function is a sine function or a cosine function, includes: when the pressure control function is a cosine function, the pressure control function expression is as follows:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise periodAnd t is represented by the current rise time, a2、b2、c2Respectively expressed as a first cosine adjusting parameter, a second cosine adjusting parameter, and a third cosine adjusting parameter.
In one embodiment, controlling the pressure of the ventilator according to the current pressure value comprises: determining a preset target duty ratio control value of the PID controller according to the current pressure value; and controlling the pressure of the breathing machine according to the target duty ratio control value.
In one embodiment, determining the pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function comprises: calculating to obtain an initial proportional value corresponding to the current rise time according to the pressure rise period and the pressure control function; and acquiring a preset pressure proportion adjusting parameter, and calculating according to the pressure proportion adjusting parameter and the initial proportion value to obtain the pressure control proportion.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method of pressure control in a ventilator, comprising:
acquiring a set pressure rise period;
acquiring a preset pressure control function, wherein the pressure rising period is a parameter of the pressure control function, and the pressure control function comprises: a sine function or a cosine function;
determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function;
acquiring a target pressure value;
determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and a pressure control proportion corresponding to the current rise time;
controlling the pressure of the breathing machine according to the current pressure value;
the determining a pressure control proportion corresponding to the current rise time according to the pressure rise period and the pressure control function includes:
calculating an initial proportional value corresponding to the current rise time according to the pressure rise period and the pressure control function, wherein the initial proportional value refers to a coefficient of the pressure control function, the initial value of the coefficient of the pressure control function is 1, and the initial proportional value of the previous rise time is a coefficient of the control function of the current rise time;
and acquiring a preset pressure proportion adjusting parameter, and calculating according to the pressure proportion adjusting parameter and the initial proportion value to obtain the pressure control proportion.
2. The method for controlling pressure in a ventilator according to claim 1, wherein the determining a pressure control ratio corresponding to a current rise time according to the pressure rise period and the pressure control function comprises:
when the current rising time is smaller than or equal to the pressure rising period, taking the current rising time as an independent variable of the pressure control function, and calculating to obtain a function value corresponding to the current rising time;
and determining the pressure control proportion corresponding to the current rise time according to the function value.
3. The method for controlling pressure in a ventilator according to claim 1, wherein the obtaining a preset pressure control function, the pressure rise period being a parameter of the pressure control function, and the pressure control function being a sine function or a cosine function, comprises:
when the pressure control function is a sine function, the pressure control function expression is:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise period, t is expressed as said current rise time, a1、b1、c1Respectively expressed as a first sinusoidal adjustment parameter, a second sinusoidal adjustment parameter, a third sinusoidal adjustment parameter.
4. The method for controlling pressure in a ventilator according to claim 1, wherein the obtaining a preset pressure control function, the pressure rise period being a parameter of the pressure control function, the pressure control function being a sine function or a cosine function, comprises:
when the pressure control function is a cosine function, the pressure control function expression is as follows:
where slope (T) is expressed as an expression of the pressure control function, T0Expressed as said pressure rise period, t is expressed as said current rise time, a2、b2、c2Respectively expressed as a first cosine adjusting parameter, a second cosine adjusting parameter, and a third cosine adjusting parameter.
5. The method of claim 1, wherein the controlling the pressure of the ventilator according to the current pressure value comprises:
determining a preset target duty ratio control value of the PID controller according to the current pressure value;
and controlling the pressure of the breathing machine according to the target duty ratio control value.
6. A pressure control device in a ventilator, the ventilator comprising:
the first acquisition module is used for acquiring a set pressure rise period;
a second obtaining module, configured to obtain a preset pressure control function, where the pressure rise period is a parameter of the pressure control function, and the pressure control function includes: a sine function or a cosine function;
the first determining module is used for determining a pressure control proportion corresponding to the current rising time according to the pressure rising period and the pressure control function;
the third acquisition module is used for acquiring a target pressure value;
the second determination module is used for determining a current pressure value corresponding to the current rise time of the breathing machine according to the target pressure value and the pressure control proportion corresponding to the current rise time;
the control module is used for controlling the pressure of the breathing machine according to the current pressure value;
the first determining module comprises a second calculating unit and a third calculating unit;
the second calculation unit is used for calculating an initial proportional value corresponding to the current rise time according to the pressure rise period and the pressure control function, wherein the initial proportional value refers to a coefficient of the pressure control function, the initial value of the coefficient of the pressure control function is 1, and the initial proportional value of the last rise time is a coefficient of the control function of the current rise time;
and the third calculating unit is used for acquiring a preset pressure proportion adjusting parameter and calculating the pressure control proportion according to the pressure proportion adjusting parameter and the initial proportion value.
7. The pressure control apparatus of claim 6, wherein the first determining module comprises:
the first calculation unit is used for calculating a function value corresponding to the current rising time by taking the current rising time as an independent variable of the pressure control function when the current rising time is less than or equal to the pressure rising period;
and the first determining unit is used for determining the pressure control proportion corresponding to the current rise time according to the function value.
8. A ventilator comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of the method for pressure control in a ventilator according to any one of claims 1 to 5.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method for pressure control in a ventilator according to any one of claims 1 to 5.
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| CN202010065365.8A CN111135412B (en) | 2020-01-20 | 2020-01-20 | Pressure control method and device in breathing machine, breathing machine and storage medium |
| PCT/CN2020/115337 WO2021147350A1 (en) | 2020-01-20 | 2020-09-15 | Method and apparatus for controlling pressure in ventilator, ventilator and storage medium |
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| CN111135412B (en) * | 2020-01-20 | 2022-01-25 | 深圳市科曼医疗设备有限公司 | Pressure control method and device in breathing machine, breathing machine and storage medium |
| WO2023019551A1 (en) * | 2021-08-20 | 2023-02-23 | 深圳迈瑞生物医疗电子股份有限公司 | Ventilation device, and method for adjusting pressure rise time |
| CN114185372B (en) * | 2021-11-08 | 2023-09-19 | 北京谊安医疗系统股份有限公司 | Ventilation pressure lifting rate control system and control method for breathing machine |
| CN114209938B (en) * | 2021-11-23 | 2023-11-10 | 北京谊安医疗系统股份有限公司 | Pressure control method and control system for breathing machine |
| CN116370760B (en) * | 2023-02-01 | 2024-01-30 | 广州和普乐健康科技有限公司 | Single horizontal respirator control device and system |
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| FR2794635B1 (en) * | 1999-06-14 | 2001-08-03 | Taema | APPARATUS FOR DIAGNOSING OR TREATING SLEEP BREATHING DISORDERS AND METHOD OF OPERATION |
| KR100371736B1 (en) * | 2000-03-03 | 2003-02-11 | 이상훈 | Portable respirator |
| DE60228322D1 (en) * | 2001-10-30 | 2008-09-25 | Hamilton Medical Ag | Device for monitoring pressure-volume curves |
| EP1701757B1 (en) * | 2004-01-07 | 2011-07-27 | ResMed Limited | Methods for providing expiratory pressure relief in positive airway pressure therapy |
| JP5702727B2 (en) * | 2008-12-09 | 2015-04-15 | コーニンクレッカ フィリップス エヌ ヴェ | Automatic adjustment of rise time |
| CN103608062B (en) * | 2011-03-18 | 2016-04-13 | 马奎特紧急护理公司 | Support breathing apparatus and the method for ventilation |
| EP2844323A4 (en) * | 2012-05-02 | 2015-11-25 | Resmed Ltd | Methods and apparatus for pressure treatment modulation |
| DE102015103894A1 (en) * | 2015-03-17 | 2016-09-22 | Fritz Stephan Gmbh Medizintechnik | Respirators and control methods for ventilators |
| CN106902431B (en) * | 2015-12-22 | 2019-07-16 | 北京谊安医疗系统股份有限公司 | The control method of ramp up time in turbine Anesthesia machine PCV ventilating mode |
| CN109621114A (en) * | 2018-12-17 | 2019-04-16 | 湖南城市学院 | A kind of mechanical ventilation mode, pressure control method |
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