CN111672002B

CN111672002B - Pressure regulating method and device of breathing machine

Info

Publication number: CN111672002B
Application number: CN202010514428.3A
Authority: CN
Inventors: 姜栋; 杜红雷; 常敏; 兰广雷; 庄志
Original assignee: BMC Medical Co Ltd
Current assignee: BMC Medical Co Ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2023-05-30
Anticipated expiration: 2040-06-08
Also published as: CN111672002A

Abstract

The embodiment of the invention provides a pressure regulating method and device of a breathing machine, wherein the method comprises the following steps: determining a pressure distribution reference value based on historical pressure values within at least one historical effective operating period of the ventilator; the pressure distribution reference value belongs to a historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value; determining a target pressure range end value of the breathing machine according to the pressure distribution reference value; and setting the working pressure of the breathing machine in the target working period according to the target pressure range end value and the pressure distribution reference value. According to the embodiment of the invention, the working pressure of the breathing machine in the target working period can be automatically set without manual setting by a user, the pressure setting efficiency can be improved, and meanwhile, the set working pressure can be more suitable for the current user using the breathing machine, so that the setting effect is improved.

Description

Pressure regulating method and device of breathing machine

Technical Field

The invention relates to the technical field of medical treatment, in particular to a pressure regulating method and device of a breathing machine.

Background

At present, with the promotion of importance of health, the use of respirators in the treatment process is becoming more and more common. In order to ensure the working efficiency of the ventilator, the working pressure of the ventilator often needs to be set.

In the prior art, pressure setting is often performed manually and empirically. In this way, the setting efficiency is low.

Disclosure of Invention

The embodiment of the invention provides a method and a device for adjusting the pressure of a breathing machine, which are used for solving the problem of low pressure setting efficiency of the breathing machine in the prior art.

In order to solve the above problems, the embodiments of the present invention are implemented as follows:

in a first aspect, an embodiment of the present invention discloses a method for adjusting pressure of a ventilator, the method comprising:

determining a pressure distribution reference value according to historical pressure values in at least one historical effective working period of the breathing machine; the pressure distribution reference value belongs to the historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value;

determining a target pressure range end value of the breathing machine according to the pressure distribution reference value;

And setting the working pressure of the breathing machine in a target working period according to the target pressure range end value and the pressure distribution reference value.

In a second aspect, an embodiment of the present invention discloses a pressure regulating device for a ventilator, the device comprising:

a first determining module for determining a pressure distribution reference value based on historical pressure values within at least one historical effective operating period of the ventilator; the pressure distribution reference value belongs to the historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value;

the second determining module is used for determining the end value of the target pressure range of the breathing machine according to the pressure distribution reference value;

and the setting module is used for setting the working pressure of the breathing machine in the target working period according to the end value of the target pressure range and the pressure distribution reference value.

In a third aspect, an embodiment of the present invention discloses a ventilator comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method for pressure regulation of a ventilator according to the first aspect.

In a fourth aspect, embodiments of the present invention disclose a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the pressure regulating method of a ventilator according to the first aspect.

In the embodiment of the invention, a pressure distribution reference value is determined according to a historical pressure value in at least one historical effective working period of the breathing machine; the pressure distribution reference value belongs to a historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value; then determining the target pressure range end value of the breathing machine according to the pressure distribution reference value; and setting the working pressure of the breathing machine in the target working period according to the end value of the target pressure range and the pressure distribution reference value. According to the embodiment of the invention, the working pressure of the breathing machine in the target working period is automatically set according to the target pressure range end value and the pressure distribution reference value by determining the target pressure range end value and the pressure distribution reference value without manual setting by a user, so that the pressure setting efficiency can be improved to a certain extent. Meanwhile, compared with the mode of only determining the pressure distribution reference value and directly setting the working pressure according to the preset fixed pressure range end value and the pressure distribution reference value, in the embodiment of the invention, the pressure distribution reference value and the target pressure range end value of the breathing machine are determined simultaneously through the historical pressure value, and the working pressure of the breathing machine is set by taking the historical pressure value as the setting basis, so that the setting basis can be adapted to the current situation to a certain extent, the set working pressure can be further adapted to the user using the breathing machine at present, and the setting effect is further improved.

Drawings

FIG. 1 shows a flow chart of the steps of a method of pressure regulation of a ventilator of the present invention;

FIG. 2 shows a flow chart of the steps of another method of pressure regulation of a ventilator of the present invention;

fig. 3 shows a block diagram of a pressure regulating device of a ventilator according to the invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, a flow chart of steps of a method for adjusting pressure of a ventilator according to the present invention is shown, the method may be directly applied to the ventilator to perform pressure control, or the ventilator may be controlled by an external device or software to implement the adjustment process, which is not limited by the embodiment of the present invention. The method specifically comprises the following steps:

step 101, determining a pressure distribution reference value according to a historical pressure value in at least one historical effective working period of the breathing machine; the pressure distribution reference value belongs to the historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value.

In the embodiment of the invention, the breathing machine can be a device which can replace, control or change normal physiological breathing of a person, increase lung ventilation, improve respiratory function, reduce respiratory function consumption and save heart reserve capacity. The historical effective operation period may refer to a period during which the ventilator is operating normally, i.e., is normally assisting the user in breathing. The historical pressure value may be a pressure value of the ventilator at various points in time during the historical effective operating period, and in particular, the historical pressure value may be constantly changing over time. Because the breathing machine normally assists the user to breathe in the historical effective working period, the historical pressure value in the historical effective working period can be considered to be suitable for the user to a certain extent, namely, the breathing machine has certain referenceability and has guiding significance. Therefore, in the embodiment of the invention, the pressure distribution reference value can be determined by taking the historical pressure value in the historical effective working period as a basis.

The pressure distribution reference value can be used for representing proper treatment pressure corresponding to the effective working period of the breathing machine, the pressure distribution reference value is one of the historical pressure values, and in the historical effective working period, the value of the time length ratio of the first working time length corresponding to the pressure distribution reference value in the historical effective working period is smaller than or equal to the historical pressure value in a preset ratio range.

For example, the pressure distribution reference value may be represented as P95, that is, the time ratio of the historical pressure value of the ventilator operation lower than P95 in the period of the historical effective operation of the ventilator is 95%, and of course, other preset ratios may be used to determine the pressure distribution reference value, which is not limited in the embodiment of the present invention.

And 102, determining the target pressure range end value of the breathing machine according to the pressure distribution reference value.

In the embodiment of the present invention, the end value of the target pressure range may refer to the upper and lower limits of the working pressure of the breathing machine, for example, the maximum breathing pressure and the minimum breathing pressure, and also the maximum inspiration pressure and the minimum inspiration pressure.

Specifically, after the user breathes with the ventilator for a period of time, the physiological condition and the breathing function of the user will change, and accordingly, the range of the working pressure of the ventilator that the user can currently bear will also change. In one implementation, when the ventilator works, the pressure is often selected as the working pressure from a preset fixed pressure range end value according to a preset fixed pressure distribution reference value. Thus, if the pressure range end value includes a pressure value that is not suitable for the user, the user is negatively affected.

For example, in one implementation, the minimum pressure is selected from a minimum pressure, and if the minimum pressure that the user can withstand is greater than the minimum pressure in the end of the pressure range, then the ventilator needs to be adjusted to the appropriate user's working pressure after a period of time, and during the time that the pressure rises, the user may experience a large number of respiratory events, which may negatively affect the user. For example, in the case of an unsuitable pressure of the ventilator, a residual respiratory event may frequently occur during the use of the ventilator by the user, and thus the sleep of the user may be seriously affected. Wherein respiratory events may be apneas and hypopneas, hypopneas refers to respiratory airflow that decreases by more than 50% of the airflow with a 4% or more decrease in blood oxygen saturation.

Compared with the method that the preset fixed pressure range end value is directly used, in the embodiment of the invention, the target pressure range end value which is more suitable for the user is further determined again through the pressure distribution reference value, so that the working pressure which is set according to the target pressure range end value, namely the pressure distribution reference value, can be ensured to be more suitable for the user to a certain extent.

And 103, setting the working pressure of the breathing machine in a target working period according to the end value of the target pressure range and the pressure distribution reference value.

In the embodiment of the invention, the target working period may refer to the current working period of the breathing machine, and may also refer to the next working period of the breathing machine. The target pressure range end value and the pressure distribution reference value are determined according to the historical pressure value in the historical effective working period with referenceability and guidance significance, and the target pressure range end value and the pressure distribution reference value can be considered to be suitable for the physical state of the current user in a certain way, so that the working pressure can be set according to the target pressure range end value and the pressure distribution reference value, the working pressure can be ensured to be more suitable for the physical state of the user, and the setting effect of the working pressure is further improved.

In summary, according to the method for adjusting the pressure of the breathing machine provided by the embodiment of the invention, the pressure distribution reference value is determined according to the historical pressure value in at least one historical effective working period of the breathing machine; the pressure distribution reference value belongs to a historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value; then determining the target pressure range end value of the breathing machine according to the pressure distribution reference value; and setting the working pressure of the breathing machine in the target working period according to the end value of the target pressure range and the pressure distribution reference value. According to the embodiment of the invention, the working pressure of the breathing machine in the target working period is automatically set according to the target pressure range end value and the pressure distribution reference value by determining the target pressure range end value and the pressure distribution reference value without manual setting by a user, so that the pressure setting efficiency can be improved to a certain extent. Meanwhile, compared with the mode of only determining the pressure distribution reference value and directly setting the working pressure according to the preset fixed pressure range end value and the pressure distribution reference value, in the embodiment of the invention, the pressure distribution reference value and the target pressure range end value of the breathing machine are determined simultaneously through the historical pressure value, and the working pressure of the breathing machine is set by taking the historical pressure value as the setting basis, so that the setting basis can be adapted to the current situation to a certain extent, the set working pressure can be further adapted to the user using the breathing machine at present, and the setting effect is further improved.

Referring to fig. 2, a flow chart of steps of another method for adjusting pressure of a ventilator according to the present invention is shown, the method may be directly applied to the ventilator to perform pressure adjustment, or the ventilator may be controlled by an external device or software to perform the adjustment process, which is not limited by the embodiment of the present invention. The method specifically comprises the following steps:

step 201, determining a pressure distribution reference value according to a historical pressure value in at least one historical effective working period of the breathing machine; the pressure distribution reference value belongs to the historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value.

Optionally, the historical effective working period may be a working period in which the duration of the ventilator is longer than a preset duration, and the duty ratio of the second working duration of the ventilator in the duration of the ventilator is greater than a preset duty ratio threshold; and the air leakage of the breathing machine in the second working time period is not more than a preset air leakage threshold value.

In the embodiment of the invention, the preset duration may refer to a duration threshold set according to actual requirements, for example, the preset duration may be set to 4 hours, and correspondingly, the duration of the operation of the ventilator is longer than 4 hours, which may be used as one of the judging conditions of the historical effective operation period.

The preset air leak threshold may refer to a preset threshold of ventilator air leak, which may be, for example, 90 Liters Per Minute (LPM). The preset air leakage threshold value can be used for representing the working state of the breathing machine, and if the air leakage is overlarge, the breathing machine exceeds the preset air leakage threshold value and can be judged to be in an invalid working state in the time corresponding to the overlarge air leakage. The second operation duration may refer to a time when the air leakage of the ventilator is not greater than a preset threshold, for example, "the percentage of the second operation duration with the air leakage less than 90LPM to the continuous operation duration is greater than 95%" may be used as the second determination condition of the effective operation period. The two determination conditions are satisfied, that is, the operation period can be regarded as a history effective operation period.

In the embodiment of the invention, the working time period meeting the two judging conditions is taken as the historical effective working time period, so that the historical pressure value in the historical effective working time period can be ensured to accurately provide reference, and the accuracy of the pressure distribution reference value and the target pressure range end value which are determined according to the historical pressure value in the historical effective working time period can be ensured to a certain extent.

Optionally, the pressure distribution reference value may include a first distribution reference value and a second distribution reference value; the number of the historical effective working periods is not less than a preset number threshold.

In the embodiment of the invention, when the pressure distribution reference value is calculated, the duty ratio of the time length corresponding to the historical pressure value which is not greater than the pressure distribution reference value in the historical effective working time period can be different values, for example, P95 or P50 can be adopted, that is, the time duty ratio of the historical pressure value of the work of the breathing machine lower than P95 is 95%, or the time duty ratio of the historical pressure value of the work of the breathing machine lower than P50 is 50%. Accordingly, the first distribution reference value may be P95 and the second distribution reference value may be P50.

In the embodiment of the present invention, the preset number threshold may be a preset number of historical effective operation periods, for example, may be 2, 3, 4, 5, etc., and for example, the pressure distribution reference value may be calculated based on data in the 5 historical effective operation periods. When the number acquired by the breathing machine does not meet the preset number threshold, the working pressure can be set by adopting a default pressure value of the breathing machine, and the step is executed according to the historical effective working period under the condition that at least the historical effective working period with the preset number threshold can be acquired. According to the embodiment of the invention, the pressure distribution reference value and the target pressure range end value are determined according to the historical pressure value in the historical effective working period under the condition that a plurality of historical effective working period data are obtained, namely enough referenceable data are provided, so that the accuracy of the determined pressure distribution reference value and target pressure range end value can be ensured, and the accuracy of the pressure setting of the breathing machine in the subsequent step is further improved.

Accordingly, this step 201 may be specifically implemented by the following sub-steps 2011 to 2012:

sub-step 2011: and for any one of the historical effective working periods, calculating a first distribution sub-reference value and a second distribution sub-reference value corresponding to the historical effective working period according to the historical pressure value in the historical effective working period.

In the embodiment of the invention, the first distribution sub-reference value may represent a first pressure distribution reference value of the adaptive target working period determined according to the historical pressure value in the historical effective working period, and the second distribution sub-reference value may represent a second pressure distribution reference value of the adaptive target working period determined according to the historical pressure value in the historical effective working period.

Optionally, this substep 2011 may be implemented by the following steps (1) - (2):

step (1): and sequentially selecting m historical pressure values and n historical pressure values according to the pressure value from the minimum historical pressure value.

In the embodiment of the invention, when the first distribution sub-reference value and the second distribution sub-reference value in the historical effective working period are calculated, the working time length corresponding to each historical pressure value can be determined, then the historical pressure values of which the ratio of the sum of m corresponding working time lengths to the time length of the historical effective working period is equal to a first preset ratio are selected according to the sequence of the historical pressure values from small to large so as to determine the first distribution sub-reference value, and the historical pressure values of which the ratio of the sum of n corresponding working time lengths to the time length of the historical effective working period is equal to a second preset ratio are selected so as to determine the first distribution sub-reference value. Wherein m and n are integers greater than 0, and the working time length corresponding to each historical pressure value is different, so that the specific number of m and n is not fixed.

Step (2): taking the largest historical pressure value in the m historical pressure values as the first distribution sub-reference value, and taking the largest historical pressure value in the n historical pressure values as the second distribution sub-reference value. The ratio of the sum of the corresponding working durations of the m historical pressure values to the duration of the historical effective working period is equal to a first preset ratio, and the ratio of the sum of the corresponding working durations of the n historical pressure values to the duration of the historical effective working period is equal to a second preset ratio; the first preset ratio and the second preset ratio are within the preset ratio range.

In the embodiment of the present invention, the first preset ratio and the second preset ratio may be used to represent a ratio of a sum of working durations corresponding to the plurality of historical pressure values to a duration of a historical effective working period, and may specifically be 50% or 90% or 95%.

For example, when the ratio of the sum of the corresponding operation durations of the m historical pressure values to the duration of the historical effective operation period is equal to 95%, the largest historical pressure value of the m historical pressure values may be regarded as P95; when the ratio of the sum of the corresponding operation durations of the n historical pressure values to the duration of the historical effective operation period is equal to 50%, the largest historical pressure value of the n historical pressure values may be regarded as P50.

Sub-step 2012: respectively determining the average value of the first distribution sub-reference values and the average value of the second distribution sub-reference values as the first distribution reference values and the second distribution reference values; wherein the first distribution reference value is greater than the second distribution reference value.

In the embodiment of the invention, each historical effective working period corresponds to a group of first distribution sub-reference values and second distribution sub-reference values, and in the step, the average value of the first distribution sub-reference values can be calculated according to all the first distribution sub-reference values to obtain the first distribution reference values, and the average value of the second distribution sub-reference values can be calculated according to all the second distribution sub-reference values to obtain the second distribution reference values.

In the embodiment of the invention, the corresponding first distribution sub-reference value and second distribution sub-reference value in each historical effective working period are calculated through the historical pressure values in the historical effective working period, and then the average value of the first distribution sub-reference value and the average value of the second distribution sub-reference value are respectively determined to be the first distribution reference value and the second distribution reference value, so that the pressure data in a plurality of historical effective working periods can be integrated, the obtained pressure distribution reference values are more in accordance with the actual breathing state of a user, and the breathing machine which works with the working pressure set according to the pressure distribution reference values can be further used for assisting the user to breathe more effectively.

And 202, determining the end value of the target pressure range of the breathing machine according to the pressure distribution reference value.

Alternatively, the present step 202 may be specifically implemented by the following implementation one and implementation two.

One implementation way,

Optionally, the target pressure range end value includes a minimum respiratory pressure end value and a maximum respiratory pressure end value.

In the embodiment of the invention, the implementation mode I can be applied to a single horizontal breathing machine. The single level ventilator may refer to a ventilator that applies the same inspiratory and expiratory pressures to a user when the user inhales and exhales. The single-level breathing machine in the embodiment of the invention mainly refers to a AutoCPAP (Auto Continueous Positive Airway Pressure) breathing machine, namely a full-automatic continuous positive pressure ventilation breathing machine, and the breathing machine can automatically adjust treatment pressure according to the airway obstruction condition of a user within a set pressure range.

In the embodiment of the present invention, the target pressure range end value of the AutoCPAP ventilator may include a minimum respiratory pressure end value and a maximum respiratory pressure end value, that is, when the ventilator works, the working pressure fluctuates in the range of the minimum respiratory pressure end value and the maximum respiratory pressure end value.

Accordingly, this step 202 may be implemented by the following sub-steps (3) - (4).

And (3) calculating the minimum respiratory pressure end value according to the second distribution reference value and the first preset constant.

In the embodiment of the invention, the minimum respiratory pressure end value may refer to the minimum respiratory pressure of the AutoCPAP breathing machine, namely, the minimum value of the inhalation pressure applied to the user and the minimum value of the exhalation pressure applied to the user. The first preset constant may be a constant preset by a user, and the user may set based on actual requirements, such as 2, 3, 4, etc. Specifically, the minimum respiratory pressure end value may be calculated from the second distribution reference value and the first preset constant, for example, the second distribution reference value may be P50, and the minimum respiratory pressure end value may be a sum or a difference between P50 and the first preset constant, which is not limited in the embodiment of the present invention.

And (4) calculating the maximum respiratory pressure end value according to the first distribution reference value and a second preset constant.

In the embodiment of the invention, the maximum respiratory pressure end value may refer to the maximum respiratory pressure of the AutoCPAP ventilator, namely, the maximum value of the inhalation pressure applied to the user and the maximum value of the exhalation pressure applied to the user. The second preset constant may be a constant preset by a user, and the user may set based on actual requirements, such as 2, 3, 4, 5, etc. Specifically, the maximum respiratory pressure end value may be calculated from the first distribution reference value and the second preset constant, for example, the first distribution reference value may be P95, and the minimum respiratory pressure end value may be a sum of P95 and the second preset constant, which is not limited in the embodiment of the present invention.

Specifically, the substep (4) may be implemented by the following steps (a) to (c):

and (a) adding the first distribution reference value and the second preset constant to obtain a first sum value.

In the embodiment of the invention, the first sum value can be obtained after the first distribution reference value and the second preset constant are added.

And (b) taking the first sum value as the maximum respiratory pressure end value if the first sum value is not greater than a preset end value threshold.

In the embodiment of the present invention, the preset threshold may be the highest pressure allowed to be applied by the ventilator according to the actual situation.

When the first sum is not greater than the preset threshold, the calculated first sum may be considered to be within a reasonable range, and therefore, the first sum may be considered to be the maximum respiratory pressure threshold. The preset threshold value may be 20 (hpa, hundred pa).

And (c) taking the preset end value threshold as the maximum respiratory pressure end value if the first sum value is larger than the preset end value threshold.

When the first sum is greater than the preset threshold value, the calculated first sum is considered to be out of a reasonable range, and the reference value is low. Thus, the preset threshold value may be directly taken as the maximum respiratory pressure threshold value.

In the embodiment of the invention, the first sum is taken as the maximum respiratory pressure end value under the condition that the first sum is larger than the preset end value threshold. The first sum is taken as the maximum respiratory pressure end value only if the calculated first sum is not greater than a preset end value threshold. The rationality of the maximum respiratory pressure end value can be ensured to a certain extent, and further the problem that users are injured due to unreasonable working pressure in subsequent setting is avoided.

In the embodiment of the invention, for a single-level breathing machine, the minimum respiratory pressure end value is obtained through the calculation of the second distribution reference value and the first preset constant, and the maximum respiratory pressure end value is obtained through the calculation of the first distribution reference value and the second preset constant, so that the target pressure range end value can be calculated based on the historical pressure data of a plurality of historical effective working periods of the breathing machine, the intelligent regulation of the pressure end value of the breathing machine is realized, and meanwhile, the target pressure range end value can be ensured to be adapted to the physical state of a user in the target working period, and the problem that negative influence is caused to the user in the pressure regulation process of the breathing machine is further avoided.

The second implementation mode,

Optionally, the target pressure range end may include a minimum expiratory pressure end, a minimum inspiratory pressure end, and a maximum inspiratory pressure end.

In the embodiment of the invention, the second implementation mode can be applied to a double-horizontal breathing machine. The bi-level ventilator may be a bi-level positive airway pressure ventilator (bilevel positive airway pressure ventilator, BPAP ventilator) that may set and adjust inspiratory (inspiratory positive airway pressur, IPAP) and expiratory (expiratory positive airway pressure, EPAP) pressures, i.e., the bi-level ventilator applies different inspiratory and expiratory pressures to the user as the user inhales and exhales. For example, it may be that the ventilator provides a higher inspiratory pressure to keep the airway open when the user inhales, and a lower expiratory pressure when exhaling to ensure that the user breathes smoothly.

In the embodiment of the present invention, when the ventilator is a bi-level ventilator, the target pressure range end value includes a minimum expiratory pressure end value, a minimum inspiratory pressure end value, and a maximum inspiratory pressure end value, and the maximum expiratory pressure end value may be calculated based on the three end values, which is not particularly limited in the embodiment of the present invention.

Accordingly, this step 202 may be implemented by the following sub-steps (5) - (7):

and (5) calculating the minimum expiratory pressure end value according to the second distribution reference value and a third preset constant.

In the embodiment of the invention, the minimum expiratory pressure end value may refer to the minimum expiratory pressure of the bi-level ventilator. The third preset constant may be a constant preset by a user, and the user may set based on actual requirements, such as 2, 3, 4, 5, etc. Specifically, the minimum expiratory pressure end value may be calculated by the second distribution reference value and the third preset constant, for example, the second distribution reference value may be P50, and the minimum expiratory pressure end value may be a sum or a difference between P50 and the third preset constant, which is not limited in the embodiment of the present invention.

And (6) calculating the minimum inhalation pressure end value according to the minimum exhalation pressure end value and a fourth preset constant.

In the embodiment of the present invention, the maximum inspiratory pressure end value may refer to the minimum inspiratory pressure of the bi-level ventilator. The fourth preset constant may refer to Pressure Support (PS), which may be set by the user based on actual conditions, for ensuring a sufficient Tidal Volume (VT), the volume of each inhalation or exhalation while calm breath. The fourth preset constant, i.e. the value of the pressure support, may typically be 4-8 hpa. Specifically, the maximum inspiratory pressure end value may be calculated from the minimum expiratory pressure end value and the fourth preset constant, for example, the maximum inspiratory pressure end value may be a sum of the minimum expiratory pressure end value and the fourth preset constant, and the embodiment of the present invention is not limited to a specific calculation manner.

And (7) calculating the maximum suction pressure end value according to the first distribution reference value, a fifth preset constant and the fourth preset constant.

In the embodiment of the present invention, the maximum inspiratory pressure end value may refer to the maximum inspiratory pressure of the bi-level ventilator. The fifth preset constant may be a constant preset by a user, and the user may set based on actual requirements, such as 2, 3, 4, 5, etc. Specifically, in this step, the sum of the first distribution reference value, the fifth preset constant and the fourth preset constant may be taken as the maximum suction pressure end value, where the first distribution reference value may be P95.

Specifically, the substep (7) may be implemented by the following steps (d) to (f):

and (d) adding the first distribution reference value, the fifth preset constant and the fourth preset constant to obtain a second sum value.

In the embodiment of the present invention, a second sum value can be obtained by adding the first distribution reference value, the fifth preset constant and the fourth preset constant PS, and a subsequent judgment is performed by using the second sum value to determine the maximum suction pressure end value.

And (e) if the second sum is not greater than a preset threshold value, taking the second sum as the maximum suction pressure end value.

In the embodiment of the present invention, the preset threshold may be the highest pressure allowed to be applied by the ventilator according to the actual situation. When the second sum is not greater than the preset threshold value, the calculated second sum may be considered to be within a reasonable range, and therefore, the second sum may be taken as the maximum suction pressure threshold value. The preset threshold value may be 20 (hpa, hundred pa).

And (f) taking the preset end value threshold as the maximum suction pressure end value if the second sum value is larger than the preset end value threshold.

When the second sum is greater than the preset threshold value, the calculated second sum is considered to be out of a reasonable range, and the reference value is low. Thus, the preset threshold value may be directly taken as the maximum inspiratory pressure threshold.

In the embodiment of the invention, the second sum is taken as the maximum suction pressure end value under the condition that the second sum is larger than the preset end value threshold. And taking the second sum value as the maximum suction pressure end value only when the calculated second sum value is not larger than the preset end value threshold value. The rationality of the maximum suction pressure end value can be ensured to a certain extent, and further the problem that users are injured due to unreasonable working pressure in subsequent setting is avoided.

In the embodiment of the invention, for a bi-level ventilator, a minimum expiratory pressure end value is calculated through a second distribution reference value and a third preset constant, a maximum inspiratory pressure end value is calculated through a minimum expiratory pressure end value and a fourth preset constant, and a maximum inspiratory pressure end value is calculated through a first distribution reference value, a fifth preset constant and a fourth preset constant. Like this, can calculate target pressure range end value based on the historical pressure data of a plurality of effective operating periods of breathing machine, realized the intelligent regulation of breathing machine pressure end value, can ensure simultaneously that target pressure range end value can adapt to the user's in the target operating period health state, and then avoid breathing machine pressure to adjust the in-process and cause the problem of negative influence to the user, improve the breathing auxiliary effect of breathing machine.

Step 203, selecting the working pressure from a target pressure range corresponding to the end value of the target pressure range according to the pressure distribution reference value; wherein the pressure distribution reference value is the first distribution reference value; and the ratio of the sum of the working time durations corresponding to the working pressures smaller than the pressure distribution reference value in the target working time period to the time duration of the target working time period is equal to a first preset ratio.

In the embodiment of the present invention, the pressure distribution reference value may be a first distribution reference value, for example, may be P95. Specifically, when the working pressure of the breathing machine is set according to the end value of the target pressure range and the pressure distribution reference value, the pressure range of the breathing machine may be set according to the end value of the target pressure range, and then the working pressure of the breathing machine is set according to the first distribution reference value, that is, P95 in the target working period may be set as the first distribution reference value, so that the working pressure in the target working period is in the target pressure range, and meanwhile, the ratio of the sum of the working durations corresponding to the working pressures lower than the first distribution reference value to the target working period is 95%.

According to the embodiment of the invention, the working pressure is selected from the target pressure range corresponding to the end value of the target pressure range according to the pressure distribution reference value, namely, the working pressure in the target working time period is set based on the average value of P95 in a plurality of effective working time periods, so that the intelligent regulation of the pressure of the breathing machine can be realized, the manual and frequent regulation is correspondingly reduced, and the regulation efficiency of the breathing machine is improved.

Optionally, after setting the working pressure, the following steps (8) to (10) may be further performed:

And (8) acquiring a respiratory disturbance index in the at least one historical effective working period and the current working pressure of the breathing machine.

In the embodiment of the invention, the breathing disorder index and the current working pressure value can be obtained for subsequent pressure adjustment. Wherein, the respiratory disturbance index (AHI or RDI) may refer to average number of apneas and hypopneas per hour, and wherein an expiratory pause may refer to an oral-nasal airflow cessation of 10 seconds or more.

Step (9), determining the pressure adjustment quantity of the breathing machine according to a preset corresponding relation corresponding to the current working pressure; the preset correspondence characterizes a correspondence between the respiratory disturbance index and the pressure adjustment under the current working pressure.

In the embodiment of the invention, the corresponding relation between the breathing disorder index and the pressure adjustment amount is preset in the breathing machine, and the current working pressure of the breathing machine is different, and the corresponding relation of the breathing disorder index and the pressure adjustment amount is different. Specifically, in this step, the corresponding relationship under the current working pressure can be determined by the obtained current working pressure of the breathing machine, and then the value of the pressure adjustment amount is determined according to the value of the breathing disorder index.

Optionally, step (9) may be implemented by the following sub-steps (g) - (h):

a substep (g) obtaining the snoring frequency during the at least one historical effective working period in case the respiratory disturbance index is smaller than a preset respiratory disturbance index threshold.

In the embodiment of the present invention, the preset respiratory disturbance index threshold may be a normal respiratory disturbance index threshold, for example, may be 5, that is, when the respiratory disturbance index is smaller than the preset respiratory disturbance index threshold, it indicates that the respiratory disturbance index of the user is normal. The snoring frequency may refer to the number of snores per hour (SNI Index, SNI).

In the embodiment of the invention, under the condition that the respiratory disturbance index is smaller than the preset respiratory disturbance index threshold, namely, under the condition that the respiratory disturbance index of the user is normal, whether the working pressure of the breathing machine needs to be adjusted cannot be accurately judged only according to the respiratory disturbance index. According to the embodiment of the invention, the snoring frequency in at least one historical effective working period is obtained, so that the pressure adjustment quantity can be comprehensively judged through a plurality of parameters, and the accuracy and the sensitivity of adjustment are improved.

And (h) determining the pressure adjustment from the preset corresponding relation according to the respiratory disturbance index and the snoring frequency.

In the embodiment of the invention, under different working pressures of the breathing machine, two parameters of the breathing disorder index and the snoring frequency can correspond to one pressure adjustment amount in a preset corresponding relation.

For example, the correspondence between the respiratory disturbance index AHI, the snoring frequency SNI and the pressure adjustment of the ventilator at different operating pressures may be as follows:

as shown in the above table, when the current operating pressure P of the ventilator is 6 or less, the respiratory disturbance index AHI is 5 or less and the snoring frequency SNI is 4 or more, the pressure adjustment amount of the ventilator is +0.5hpa, that is, up-regulated by 0.5hpa. Of course, the user may set other corresponding relationships according to the actual needs, which is not limited in the embodiment of the present invention.

And (10) adjusting the current pressure of the breathing machine according to the pressure adjustment quantity.

In the embodiment of the invention, the current proper pressure adjustment quantity is determined through the breathing disorder index, the snoring frequency and the current working pressure value of the breathing machine, and the current pressure value of the breathing machine is adjusted according to the pressure adjustment quantity, so that the working pressure of the breathing machine can be adaptively adjusted according to the actual breathing condition of a user, and the problem that the set working pressure is inaccurate and has negative influence on the user is avoided to a certain extent. Meanwhile, the current working pressure is adjusted through automatic adaptability, so that manual and frequent adjustment can be avoided, and further labor cost is saved.

The pressure adjustment methods described in the above steps (8) to (10) may be applied to a continuous positive pressure ventilator (Continueous Positive Airway Pressure, CPAP). The CPAP ventilator may be a ventilator that provides a relatively stable positive airway pressure. In spontaneous breathing conditions where the user himself has a steady respiratory drive and an appropriate tidal volume, a CPAP ventilator is required to provide a relatively steady positive airway pressure to the user, for example, by applying a certain level of positive airway pressure in a continuous positive airway pressure to assist the user's breathing. CPAP ventilators are therefore generally required to provide a constant positive airway pressure to ensure a steady flow of gas. However, in practical application scenarios, the required positive airway pressure may be different as the physical state of the user changes, and thus, the working pressure may need to be adjusted from time to time. According to the pressure adjusting mode provided by the embodiment of the application, the pressure adjusting quantity is determined firstly according to the breathing disorder index and the snoring frequency which can reflect the physical state of the user, and the pressure adjusting quantity is adjusted. And then can make to a certain extent carry out accurate stable adjustment to operating pressure, when realizing the adjustment, ensure that the user can adapt to the atmospheric pressure and change, and then ensure the adjustment effect.

In summary, according to the method for adjusting the pressure of the breathing machine provided by the embodiment of the invention, the pressure distribution reference value is determined according to the historical pressure value in at least one historical effective working period of the breathing machine; the pressure distribution reference value belongs to a historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value; then determining the target pressure range end value of the breathing machine according to the pressure distribution reference value; when the pressure distribution reference value is the first distribution reference value, selecting working pressure from a target pressure range corresponding to the end value of the target pressure range according to the pressure distribution reference value; and the ratio of the sum of the working time durations corresponding to the working pressures smaller than the pressure distribution reference value in the target working time period to the time duration of the target working time period is equal to a first preset ratio. According to the embodiment of the invention, the working pressure of the breathing machine in the target working period is automatically set according to the target pressure range end value and the pressure distribution reference value by determining the target pressure range end value and the pressure distribution reference value without manual setting by a user, so that the pressure setting efficiency can be improved to a certain extent. Meanwhile, compared with the mode of only determining the pressure distribution reference value and directly setting the working pressure according to the preset fixed pressure range end value and the pressure distribution reference value, in the embodiment of the invention, the pressure distribution reference value and the target pressure range end value of the breathing machine are determined simultaneously through the historical pressure value, and the working pressure of the breathing machine is set by taking the historical pressure value as the setting basis, so that the setting basis can be adapted to the current situation to a certain extent, the set working pressure can be further adapted to the user using the breathing machine at present, and the setting effect is further improved.

It should be noted that, for simplicity of description, the method embodiments are shown as a series of acts, but it should be understood by those skilled in the art that the embodiments are not limited by the order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts are not necessarily required by the embodiments of the invention.

Referring to fig. 3, which shows a block diagram of a ventilator pressure regulating device of the present invention, the device 30 may include the following modules:

a first determining module 301, configured to determine a pressure distribution reference value according to a historical pressure value in at least one historical effective operation period of the ventilator; the pressure distribution reference value belongs to the historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value.

A second determining module 302 is configured to determine a target pressure range end value of the ventilator according to the pressure distribution reference value.

The setting module 303 is configured to set an operating pressure of the ventilator in a target operating period according to the end value of the target pressure range and the pressure distribution reference value.

Optionally, the historical effective working period is a working period in which the continuous working time of the breathing machine is longer than a preset time period, and the duty ratio of the second working time of the breathing machine in the continuous working time period is greater than a preset duty ratio threshold; and the air leakage of the breathing machine in the second working time period is not more than a preset air leakage threshold value.

Optionally, the pressure distribution reference value includes a first distribution reference value and a second distribution reference value, and the number of the historical effective working periods is not less than a preset number threshold: the second determining module 302 is specifically configured to:

for any one of the historical effective working periods, calculating a first distribution sub-reference value and a second distribution sub-reference value corresponding to the historical effective working period according to the historical pressure value in the historical effective working period; respectively determining the average value of the first distribution sub-reference values and the average value of the second distribution sub-reference values as the first distribution reference values and the second distribution reference values; the first distribution reference value is greater than the second distribution reference value.

Optionally, the first determining module 301 is specifically configured to:

sequentially selecting m historical pressure values and n historical pressure values according to the pressure values from the minimum historical pressure value; taking the largest historical pressure value in the m historical pressure values as the first distribution sub-reference value, and taking the largest historical pressure value in the n historical pressure values as the second distribution sub-reference value; the ratio of the sum of the corresponding working durations of the m historical pressure values to the duration of the historical effective working period is equal to a first preset ratio, and the ratio of the sum of the corresponding working durations of the n historical pressure values to the duration of the historical effective working period is equal to a second preset ratio; the first preset ratio and the second preset ratio are within the preset ratio range.

Optionally, the target pressure range end value includes a minimum respiratory pressure end value and a maximum respiratory pressure end value; the second determining module 302 includes:

the first calculating submodule is used for calculating the minimum respiratory pressure end value according to the second distribution reference value and a first preset constant; the second calculating sub-module is used for calculating the maximum respiratory pressure end value according to the first distribution reference value and a second preset constant; the second computing sub-module is specifically configured to:

Adding the first distribution reference value and the second preset constant to obtain a first sum value; if the first sum is not greater than a preset end value threshold, taking the first sum as the maximum respiratory pressure end value; and if the first sum value is larger than a preset end value threshold value, taking the preset end value threshold value as the maximum respiratory pressure end value.

Optionally, the target pressure range end value includes a minimum expiratory pressure end value, a minimum inspiratory pressure end value, and a maximum inspiratory pressure end value; the second determining module 302 includes:

a third calculation sub-module, configured to calculate the minimum expiratory pressure terminal value according to the second distribution reference value and a third preset constant; a fourth calculation sub-module, configured to calculate the minimum inspiratory pressure end value according to the minimum expiratory pressure end value and a fourth preset constant; and a fifth calculation sub-module, configured to calculate the maximum suction pressure end value according to the first distribution reference value, a fifth preset constant, and the fourth preset constant.

Optionally, the pressure distribution reference value is the first distribution reference value; the setting module 303 is specifically configured to: selecting the working pressure from a target pressure range corresponding to the end value of the target pressure range according to the pressure distribution reference value; and the ratio of the sum of the working time durations corresponding to the working pressures smaller than the pressure distribution reference value in the target working time period to the time duration of the target working time period is equal to a first preset ratio.

Optionally, the apparatus 30 further includes:

the acquisition module is used for acquiring the breathing disorder index and the current working pressure of the breathing machine in the at least one historical effective working period; the third determining module is used for determining the pressure adjustment quantity of the breathing machine according to the preset corresponding relation corresponding to the current working pressure; the preset corresponding relation characterizes the corresponding relation between the respiratory disturbance index and the pressure adjustment quantity under the current working pressure; and the adjusting module is used for adjusting the current pressure of the breathing machine according to the pressure adjusting quantity.

Optionally, the third determining module is specifically configured to:

acquiring snoring frequency during the at least one historical effective working period if the respiratory disturbance index is less than a preset respiratory disturbance index threshold; and determining the pressure adjustment from the preset corresponding relation according to the respiratory disturbance index and the snoring frequency.

In summary, according to the pressure adjusting device for a breathing machine provided by the embodiment of the invention, the pressure distribution reference value is determined according to the historical pressure value in at least one historical effective working period of the breathing machine; the pressure distribution reference value belongs to a historical pressure value, the ratio of the first working time length to the time length of the historical effective working time period is in a preset ratio range, and the first working time length is the sum of the working time lengths corresponding to the historical pressure value which is not more than the pressure distribution reference value; then determining the target pressure range end value of the breathing machine according to the pressure distribution reference value; and setting the working pressure of the breathing machine in the target working period according to the end value of the target pressure range and the pressure distribution reference value. According to the embodiment of the invention, the working pressure of the breathing machine in the target working period is automatically set according to the target pressure range end value and the pressure distribution reference value by determining the target pressure range end value and the pressure distribution reference value without manual setting by a user, so that the pressure setting efficiency can be improved to a certain extent. Meanwhile, compared with the mode of only determining the pressure distribution reference value and directly setting the working pressure according to the preset fixed pressure range end value and the pressure distribution reference value, in the embodiment of the invention, the pressure distribution reference value and the target pressure range end value of the breathing machine are determined simultaneously through the historical pressure value, and the working pressure of the breathing machine is set by taking the historical pressure value as the setting basis, so that the setting basis can be adapted to the current situation to a certain extent, the set working pressure can be further adapted to the user using the breathing machine at present, and the setting effect is further improved.

Optionally, an embodiment of the present invention further provides a ventilator, where the ventilator includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program when executed by the processor implements each process of the embodiment of the pressure regulation method of the ventilator, and the process can achieve the same technical effects, so that repetition is avoided, and no further description is given here.

Optionally, an embodiment of the present invention further provides a computer readable storage medium, where a computer program is stored, where the computer program when executed by a processor implements each process of the embodiment of the pressure adjustment method of the ventilator, and the same technical effects can be achieved, and in order to avoid repetition, a detailed description is omitted herein.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

As will be readily appreciated by those skilled in the art: any combination of the above embodiments is possible, and thus is an embodiment of the present invention, but the present specification is not limited by the text.

In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be construed as reflecting the intention that: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Any combination of all features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be used in combination, except insofar as at least some of such features and/or processes or units are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

Claims

1. A method of pressure regulation of a ventilator, the method comprising:

setting the working pressure of the breathing machine in a target working period according to the target pressure range end value and the pressure distribution reference value;

the pressure distribution reference values comprise a first distribution reference value and a second distribution reference value, and the number of the historical effective working time periods is not smaller than a preset number threshold value;

said determining a pressure distribution reference value from historical pressure values during at least one historical active operating period of said ventilator, comprising:

for any one of the historical effective working periods, calculating a first distribution sub-reference value and a second distribution sub-reference value corresponding to the historical effective working period according to the historical pressure value in the historical effective working period;

Respectively determining the average value of the first distribution sub-reference values and the average value of the second distribution sub-reference values as the first distribution reference values and the second distribution reference values;

wherein the first distribution reference value is greater than the second distribution reference value;

according to the historical pressure value in the historical effective working period, calculating a first distribution sub-reference value and a second distribution sub-reference value corresponding to the historical effective working period, wherein the first distribution sub-reference value and the second distribution sub-reference value comprise:

sequentially selecting m historical pressure values and n historical pressure values according to the pressure values from the minimum historical pressure value;

taking the largest historical pressure value in the m historical pressure values as the first distribution sub-reference value, and taking the largest historical pressure value in the n historical pressure values as the second distribution sub-reference value;

the ratio of the sum of the corresponding working durations of the m historical pressure values to the duration of the historical effective working period is equal to a first preset ratio, and the ratio of the sum of the corresponding working durations of the n historical pressure values to the duration of the historical effective working period is equal to a second preset ratio; the first preset ratio and the second preset ratio are within the preset ratio range.

2. The method of claim 1, wherein the historical effective operating period is an operating period in which a duration of operation of the ventilator is greater than a preset duration and a duty cycle of a second operating duration of the ventilator within the duration of operation is greater than a preset duty cycle threshold; and the air leakage of the breathing machine in the second working time period is not more than a preset air leakage threshold value.

3. The method of claim 1, wherein the target pressure range endpoints include a minimum respiratory pressure endpoint and a maximum respiratory pressure endpoint;

the determining, according to the pressure distribution reference value, a target pressure range end value of the ventilator includes:

calculating the minimum respiratory pressure end value according to the second distribution reference value and a first preset constant;

and calculating the maximum respiratory pressure end value according to the first distribution reference value and a second preset constant.

4. The method of claim 3, wherein calculating the maximum respiratory pressure endpoint based on the first distribution reference value and a second preset constant comprises:

adding the first distribution reference value and the second preset constant to obtain a first sum value;

If the first sum is not greater than a preset end value threshold, taking the first sum as the maximum respiratory pressure end value;

and if the first sum value is larger than a preset end value threshold value, taking the preset end value threshold value as the maximum respiratory pressure end value.

5. The method of claim 1, wherein the target pressure range endpoints include a minimum expiratory pressure endpoint, a minimum inspiratory pressure endpoint, and a maximum inspiratory pressure endpoint;

calculating the minimum expiratory pressure end value according to the second distribution reference value and a third preset constant;

calculating the minimum inspiratory pressure end value according to the minimum expiratory pressure end value and a fourth preset constant;

and calculating the maximum suction pressure end value according to the first distribution reference value, a fifth preset constant and the fourth preset constant.

6. The method of claim 1, wherein the pressure profile reference value is the first profile reference value;

setting the working pressure of the breathing machine in a target working period according to the target pressure range end value and the pressure distribution reference value, wherein the working pressure comprises the following components:

Selecting the working pressure from a target pressure range corresponding to the end value of the target pressure range according to the pressure distribution reference value; and the ratio of the sum of the working time durations corresponding to the working pressures smaller than the pressure distribution reference value in the target working time period to the time duration of the target working time period is equal to a first preset ratio.

7. A pressure regulating device for a ventilator, the device comprising:

the setting module is used for setting the working pressure of the breathing machine in a target working period according to the end value of the target pressure range and the pressure distribution reference value;

the second determining module is specifically configured to:

the first distribution reference value is greater than the second distribution reference value;

the first determining module is specifically configured to:

8. The apparatus of claim 7, wherein the historical effective operating period is an operating period in which a duration of operation of the ventilator is greater than a preset duration and a duty cycle of a second operating duration of the ventilator within the duration of operation is greater than a preset duty cycle threshold; and the air leakage of the breathing machine in the second working time period is not more than a preset air leakage threshold value.

9. The apparatus of claim 8, wherein the target pressure range endpoints include a minimum respiratory pressure endpoint and a maximum respiratory pressure endpoint;

the second determining module includes:

the first calculating submodule is used for calculating the minimum respiratory pressure end value according to the second distribution reference value and a first preset constant;

and the second calculating sub-module is used for calculating the maximum respiratory pressure end value according to the first distribution reference value and a second preset constant.

10. The apparatus of claim 9, wherein the second calculation sub-module is specifically configured to:

11. The apparatus of claim 7, wherein the target pressure range endpoints include a minimum expiratory pressure endpoint, a minimum inspiratory pressure endpoint, and a maximum inspiratory pressure endpoint;

the second determining module includes:

a third calculation sub-module, configured to calculate the minimum expiratory pressure terminal value according to the second distribution reference value and a third preset constant;

a fourth calculation sub-module, configured to calculate the minimum inspiratory pressure end value according to the minimum expiratory pressure end value and a fourth preset constant;

and a fifth calculation sub-module, configured to calculate the maximum suction pressure end value according to the first distribution reference value, a fifth preset constant, and the fourth preset constant.

12. The apparatus of claim 7, wherein the pressure profile reference value is the first profile reference value;

the setting module is specifically configured to:

13. The apparatus of claim 7, wherein the apparatus further comprises:

the acquisition module is used for acquiring the breathing disorder index and the current working pressure of the breathing machine in the at least one historical effective working period;

the third determining module is used for determining the pressure adjustment quantity of the breathing machine according to the preset corresponding relation corresponding to the current working pressure; the preset corresponding relation characterizes the corresponding relation between the respiratory disturbance index and the pressure adjustment quantity under the current working pressure;

and the adjusting module is used for adjusting the current pressure of the breathing machine according to the pressure adjusting quantity.

14. The apparatus according to claim 13, wherein the third determining module is specifically configured to:

acquiring snoring frequency during the at least one historical effective working period if the respiratory disturbance index is less than a preset respiratory disturbance index threshold;

and determining the pressure adjustment from the preset corresponding relation according to the respiratory disturbance index and the snoring frequency.

15. A ventilator comprising a processor, a memory and a computer program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the method of pressure regulation of a ventilator as claimed in any of claims 1 to 6.

16. A computer-readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the steps of the pressure regulating method of a ventilator according to any of claims 1 to 6.