CN111346281A

CN111346281A - Control method of medical portable respirator and medical portable respirator

Info

Publication number: CN111346281A
Application number: CN202010155851.9A
Authority: CN
Inventors: 曹佳慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-06-30

Abstract

The invention discloses a control method of a medical portable respirator and the medical portable respirator, and the method comprises the following steps: acquiring typical breathing parameters of a user; acquiring real-time respiratory state data of a user; obtaining real-time air supply quantity according to the typical breathing parameters and the breathing state data; and adjusting the rotating speed of the air pump according to the real-time air supply quantity. According to the control method of the medical portable respirator and the medical portable respirator, the operation of the air pump can be adjusted according to typical breathing parameters and breathing state data of a user to adjust enough air for the user, and compared with a scheme of enabling the air pump to rotate at a constant speed, the scheme can reduce the power consumption of the air pump and obviously improve the endurance of the respirator.

Description

Control method of medical portable respirator and medical portable respirator

Technical Field

The invention relates to the technical field of medical ventilators, in particular to a control method of a medical portable ventilator and the medical portable ventilator.

Background

In the abominable medical environment, medical personnel often need wear portable breathing machine in order to prevent that harmful gas from corroding its respiratory track, and current portable breathing machine is generally all that control the air pump and rotate at the uniform velocity for medical personnel provide clear air, because the general battery capacity of portable breathing machine is limited, therefore portable breathing machine's time of endurance is short.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a control method of a medical portable respirator capable of improving the endurance length of the respirator and the medical portable respirator.

The technical scheme is as follows: in order to achieve the above object, a control method of a medical portable ventilator according to the present invention is applied to a control system of a medical portable ventilator, the method including:

acquiring typical breathing parameters of a user;

acquiring real-time respiratory state data of a user;

obtaining real-time air supply quantity according to the typical breathing parameters and the breathing state data;

and adjusting the rotating speed of the air pump according to the real-time air supply quantity.

Further, the acquiring typical breathing parameters of the user comprises:

adjusting the rotating speed of the air pump according to the initial air supply curve to supply air to the breathing mask;

acquiring pressure difference data of the inner side and the outer side of the respirator; wherein, the pressure difference data is the difference value of the inner side air pressure and the outer side air pressure;

adjusting curve parameters according to the differential pressure data to modify the initial air supply quantity curve so that the differential pressure data is always maintained at a positive value, the differential pressure data is in a set interval, and the adjusted curve parameters are used as typical breathing parameters of a user; wherein the typical breathing parameters comprise a typical period, a typical peak value, a typical valley value and a typical curve fullness.

Further, the acquiring real-time respiratory state data of the user comprises:

acquiring real-time data of the respiratory state monitoring sensor;

generating respiratory state data according to the real-time data; wherein the respiratory state data includes a respiratory phase and a motion parameter.

Further, obtaining the real-time air supply amount according to the typical breathing parameter and the breathing state data includes:

obtaining adjusting factors of all breathing stages according to the breathing state data;

and determining the real-time air supply quantity according to the adjusting factor and the typical respiration parameter.

Breathing parameter the rotational speed according to real-time air feed volume adjustment air pump includes:

obtaining a real-time target rotating speed of the air pump according to the real-time air supply amount and the air suction amount of the air pump in each turn;

and controlling the air pump to operate according to the real-time target rotating speed.

A medical portable respirator comprises a controller, a first control unit and a second control unit, wherein the controller is used for executing the control method of the medical portable respirator; further comprising:

a respiratory mask for covering the mouth-nose portion of a user;

the air supply assembly comprises a filtering device and an air pump, and the air pump can suck air so that the air passes through the filtering device and then is injected into the respirator;

the air pressure sensor is used for acquiring air pressures on the inner side and the outer side of the air pressure sensor; and

a respiratory state monitoring sensor for acquiring respiratory state data of a user.

Has the advantages that: according to the control method of the medical portable respirator and the medical portable respirator, the operation of the air pump can be adjusted according to typical breathing parameters and breathing state data of a user to adjust enough air for the user, and compared with a scheme of enabling the air pump to rotate at a constant speed, the scheme can reduce the power consumption of the air pump and obviously improve the endurance of the respirator.

Drawings

FIG. 1 is a flow chart of a control method of a medical portable ventilator;

FIG. 2 is a schematic diagram of a feed rate curve;

FIG. 3 is a block diagram of a medical portable ventilator;

FIG. 4 is a front view of the neck hanger;

FIG. 5 is a block diagram of the gas inlet unit;

FIG. 6 is a structural view of the elastic structure;

fig. 7 is a structural view of the storage device.

In the figure: 1-a mouth mask body; 11-a breathing mask; 12-a wearable part; 13-a gas inlet unit; 131-a unit seat; 131-1-thrust shoulder; 131-2-threaded portion; 132-a fixture; 133-trachea interface; 2-neck hanging part; 21-an air pump; 22-a power supply; 23-a filtration device; 24-a controller; 25-a housing; 251-side portion; 252-middle part; 253-air intake; 26-an elastic structure; 261-intermediate rod; 262-side lever; 263-torsion spring; 264-synchronous belt; 265-a first synchronous wheel; 266-a second synchronizing wheel; 267-gear; 3-the trachea; 31-a branch pipe; 32-a pressure relief valve; 33-a filtration unit; 4-a retraction device; 41-device base; 42-a rotating base; 43-a shaft portion; 44-comb teeth; 45-spring; 46-a winding; 5-respiratory state monitoring sensor.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

Fig. 3 shows a portable medical ventilator (hereinafter referred to as "ventilator") according to the present invention, which includes a mask body 1, a neck suspension portion 2 and a breathing state monitoring sensor 5, wherein the mask body 1 includes a breathing mask 11 and a wearing portion 12; the breathing mask 11 is provided with an air inlet unit 13, and the air inlet unit 13 is communicated with the inner side and the outer side of the breathing mask 11; as shown in fig. 4, the neck-hanging part 2 includes an air supply assembly including an air pump 21, a power source 22, a filter 23 and a controller 24, the filter 23 is connected to an air inlet of the air pump 21, and an air outlet of the air pump 21 is connected to the air inlet unit 13 through an air pipe 3. The respiratory state monitoring sensor 5 is connected with the controller 24, specifically, the respiratory state monitoring sensor 5 includes an accelerometer, the respiratory state monitoring sensor 5 is attached to a respiratory muscle of a user, the controller 2 acquires fluctuation motion data of the respiratory muscle through the respiratory state monitoring sensor 5 to acquire respiratory state data of the user, the respiratory state data includes a respiratory phase and motion parameters, the respiratory phase includes an expiratory phase, an inspiratory phase, a peak value maintaining phase and a valley value maintaining phase, the motion parameters are used for characterizing motion directions, accelerations and displacements of the respiratory muscle in the expiratory phase and the inspiratory phase, and the controller 24 can judge the motion parameters of the user and the respiration jerk degree according to the motion parameters.

Above-mentioned structure is through the oral area cover body 1 and the neck portion of hanging 2 that sets up the disconnect-type, neck portion of hanging 2 carries the air that has filtered through filter equipment 23 to the oral area cover body through air pump 21, so that form pressure-fired outside for respiratory mask 11 in the respiratory mask 11, because the existence of pressure-fired, gaseous outside the clearance of passing through between respiratory mask 11 and the user face of respiratory mask 11 in the respiratory mask 11, thereby avoid the gaseous outside respiratory mask 11 inside that gets into respiratory mask 11 of respiratory mask, the stronger virus of propagation mechanism such as some accessible aerosol propagation has been prevented to pass through the gap and gets into in respiratory mask 11, better isolation virus's effect has been reached, and because the existence of pressure-fired, respiratory mask 11 need not the tight knot in medical personnel's face, so that the facial part circulation of air who is covered is all more unobstructed with blood circulation, can avoid causing the injury to medical personnel.

In addition, because the breathing machine of the invention adopts a split design structure, and the power supply 22, the air pump 21 and other components are all contained in the neck hanging part 2, the power supply 22 with larger capacity can be arranged to ensure that the breathing machine has longer endurance time, the design weight is not required to be considered emphatically, and the load of the face and the head of a wearer can be reduced.

Based on the medical portable ventilator, the control method of the medical portable ventilator is applied to the control system of the medical portable ventilator, as shown in fig. 1, the method includes the following steps S601-S604:

step S601, obtaining typical breathing parameters of a user;

in this step, the typical breathing parameters of the user are used to characterize the breathing characteristics of the user, such as the amount of single inhaled gas and the amount of exhaled gas of the user, so that the controller 24 can adapt to the characteristics of different users to perform corresponding adjustment of the supply gas amount subsequently, and adapt to the breathing characteristics of each user intelligently.

Step S602, acquiring real-time respiratory state data of a user;

in this step, the breathing state data includes a breathing phase and a motion parameter, the breathing phase includes an expiration phase, an inspiration phase, a peak value maintaining phase, and a valley value maintaining phase, the motion parameter is used to characterize the motion direction and acceleration of the respiratory muscle in the expiration phase and the inspiration phase, and the controller 24 can determine the motion parameter of the user and the respiration jerk degree according to the motion parameter.

Step S603, obtaining real-time air supply quantity according to the typical breathing parameter and the breathing state data;

in this step, because the user does not always maintain breathing according to the typical breathing parameters, the breathing state of the user has volatility, and if the user has sudden breathing and slow breathing, the controller can adjust the real-time air supply amount on the basis of the typical breathing parameters according to the breathing state data, so as to ensure that enough air supply amount can maintain the air pressure in the breathing mask 11 to form micro positive pressure relative to the external air pressure.

And step S604, adjusting the rotating speed of the air pump according to the real-time air supply quantity.

Further, the acquiring typical breathing parameters of the user in step S601 includes the following steps S701 to S703:

step S701, adjusting the rotating speed of the air pump according to an initial air supply curve to supply air to the breathing mask;

in the operation process of the respirator, the controller 24 adjusts the rotation speed of the air pump according to an air supply curve to supply air to the respirator 11, the shape of the air supply curve is determined by curve parameters, and the curve parameters comprise a period, a peak value, a valley value and curve fullness, wherein the period comprises inspiration phase time, expiration phase time, peak value maintaining time and valley value maintaining time, and the curve fullness is used for representing the fullness of curves corresponding to the two periods of the inspiration phase time and the expiration phase time, as shown in fig. 2, in the figure, the curve fullness of an air supply curve a is higher than that of an air supply curve b; in step S701, the rotation speed of the air pump is controlled according to a preset initial air supply curve to serve as an initial control strategy for the controller 24 to control the operation of the air pump, which mainly aims to enable the ventilator to operate first, enable each sensor to start collecting data, and then adjust the initial air supply curve according to the collected data of the sensors to obtain a control strategy suitable for a user wearing the ventilator.

Step S702, acquiring pressure difference data of the inner side and the outer side of the respirator; the pressure difference data is the difference value of the inner side air pressure and the outer side air pressure, namely the difference value of the inner side air pressure minus the outer side air pressure;

in the step, the air pressure at the inner side and the outer side of the respirator is collected by an air pressure sensor;

step S703, adjusting curve parameters according to the differential pressure data to modify the initial air supply curve so that the differential pressure data is always maintained at a positive value, the differential pressure data is in a set interval, and the adjusted curve parameters are used as typical breathing parameters of a user; wherein the typical breathing parameters comprise a typical period, a typical peak value, a typical valley value and a typical curve fullness.

The typical breathing parameters are obtained under the normal breathing state of the user, and the breathing machine can be provided with a reminding module for reminding the user of normal breathing so that the controller 24 can collect the typical breathing parameters.

In this step, the process of adjusting the curve parameter by the controller 24 is a cyclic iteration process until an air supply curve meeting the requirement (the differential pressure data is always maintained at a positive value, and the differential pressure data is within a set interval) is adjusted, and the curve parameter corresponding to the air supply curve is used as the typical breathing parameter of the user. The reason for having the differential pressure data within the set interval is to prevent the controller 24 from adjusting the curve parameters without an upper limit so that the amount of supplied air is much higher than the user's demand.

Further, the step S602 of acquiring the real-time respiratory state data of the user includes the following steps S801-S802:

step S801, acquiring real-time data of the respiratory state monitoring sensor 5;

step S802, generating respiratory state data according to the real-time data; wherein the respiratory state data includes a respiratory phase and a motion parameter.

The breathing phase includes an expiration phase, an inspiration phase, a peak value maintaining phase and a valley value maintaining phase, the motion parameters are used for characterizing the motion direction, the acceleration and the displacement of breathing muscles in the expiration phase and the inspiration phase, the controller 24 can know whether the user is in the expiration phase or the inspiration phase or in the peak value maintaining phase and the valley value maintaining phase with smaller displacement and speed of the breathing muscles according to the motion direction and the displacement of the breathing muscles, and the shortness degree of breathing of the user can be known according to the acceleration.

Further, the step S603 of obtaining the real-time air supply amount according to the typical breathing parameter and the breathing state data includes the following steps S901 to S902:

step S901, obtaining adjusting factors of each breathing stage according to the breathing state data;

and step S902, determining the real-time air supply quantity according to the adjusting factor and the typical breathing parameter.

In the above steps S901-S902, the adjustment factor is introduced as a further adjustment strategy adopted by the controller 24 based on typical respiratory parameters of the user, so that the ventilator can supply the appropriate gas to the user according to the real-time respiratory state data of the user.

Specifically, the manner of determining the adjustment factor in step S901 is as follows: in the inspiration phase, a first adjusting factor and a second adjusting factor are determined according to the motion acceleration of the respiratory muscle, the first adjusting factor is used for determining inspiration phase time, the higher the motion acceleration of the respiratory muscle in the inspiration phase is, the quicker the respiration of a user is represented, the lower the value of the first adjusting factor is, and the predicted inspiration phase time can be obtained by multiplying the typical inspiration phase time in the typical period by the first adjusting factor; the second adjusting factor is used for determining a peak value, the higher the motion acceleration of the respiratory muscle is, the more rapid the respiration of the user is represented, and the more the gas quantity required by the user is possible, so that the higher the motion acceleration of the respiratory muscle is, the higher the second adjusting factor is, and the real-time recommended peak value can be obtained by multiplying the typical peak value by the second adjusting factor; furthermore, a third adjustment factor can be introduced to adjust the fullness of the air supply rate curve, which is higher when the acceleration of the movement of the respiratory muscle is higher. And determining the first adjusting factor, the second adjusting factor and the third adjusting factor according to a corresponding relation table of the acceleration and the first adjusting factor, the second adjusting factor and the third adjusting factor, and searching the corresponding first adjusting factor, the second adjusting factor and the third adjusting factor according to the interval in which the value of the acceleration is located.

In addition, after the inspiration phase is performed for a period of time, the displacement of the respiratory muscle enters a phase in which the fluctuation is smaller than a preset minimum acceleration rate, and at this time, the peak value maintaining phase is performed, and the controller 24 recommends peak value air supply in real time until the peak value maintaining phase is finished.

In the expiration phase, a fourth adjusting factor and a fifth adjusting factor are determined according to the motion acceleration of the respiratory muscle, the fourth adjusting factor and the fifth adjusting factor correspond to the predicted expiration phase time and the satiation degree respectively, the higher the motion acceleration of the respiratory muscle is, the lower the fourth adjusting factor is, the lower the fifth adjusting factor is, and the typical expiration phase time in the typical period is multiplied by the fourth adjusting factor to obtain the predicted expiration phase time.

In the valley maintenance stage, the air is supplied according to typical valleys without adjusting valley data according to real-time data.

Further, the adjusting the rotation speed of the air pump according to the real-time air supply amount includes:

Preferably, with the portable respirator, the air inlet unit 13 is detachable with respect to the mask body 1, so that the used mask body 1 can be replaced or unpicked and washed; as shown in fig. 5, the air inlet unit 13 includes a unit seat 131 and a fixing member 132; the unit holder 131 is provided with an air inlet and an air pipe connector 133 for connecting the air pipe 3. A thrust shoulder 131-1 and a threaded part 131-2 are formed on the unit seat 131, and the threaded part 131-2 penetrates through a hole reserved on the breathing mask 11; the fixing member 132 is a thin nut, the fixing member 132 is screwed on the threaded portion 131-2, and the thrust shoulder 131-1 and the fixing member 132 are respectively disposed on the inner side and the outer side of the respiratory mask 11, in this embodiment, the thrust shoulder 131-1 is disposed on the inner side of the respiratory mask 11, the thickness of the thrust shoulder 131-1 is thinner, and the thrust shoulder is disposed on the inner side of the respiratory mask 11, so that the wearing foreign body sensation of the user can be reduced, and most of the structure of the air inlet unit 13 is disposed on the outer side of the respiratory mask 11.

The gas pipe 3 is provided with a branch pipe 31, and the branch pipe 31 is provided with a relief valve 32 and a filter unit 33. The branch pipe 31 and the pressure release valve 32 are arranged to prevent the breathing machine from being out of control to cause too high air pressure in the breathing mask 11, and the air pressure of the pressure release valve 32 in the branch pipe 31 can be automatically opened to release the pressure, so that the air pressure in the trachea 3 (namely the air pressure in the breathing mask 11) cannot exceed a certain threshold.

The neck hanging part 2 comprises a shell 25, and the air pump 21, the power supply 22, the filtering device 23 and the controller 24 are all arranged in the shell 25. The shell 25 is a symmetrical U-shaped structure as a whole, and the width of the area in the U-shaped structure in the direction perpendicular to the symmetry line is gradually widened and then gradually narrowed in the direction from the bottom of the U-shaped structure to the two ends of the U-shaped structure along the symmetry line; in addition, as seen from the side of the housing 25, the two side portions 251 thereof extend straight, and the middle portion 252 thereof is offset from the side portions 251 thereof with respect to the two side portions 251 of the housing 25; the middle part 252 of the shell 25 is thin, the two side parts 251 are thick, when the shell is matched, the middle part 252 is contacted with the back neck of a user, the two side parts 251 are hung on the front side of the user and are arranged on the two sides of the neck of the user, the design of the shell 25 accords with ergonomics, and the neck hanging part 2 has good wearing comfort after being worn on the neck of the user.

The air pump 21, the filter 23 and the controller 24 are disposed in one side portion 251 of the housing 25, and the housing 25 has array-type air inlets 253 corresponding to the air inlets of the filter 23, and the power source 22 is mounted in the other side portion 251 of the housing 25, so as to ensure the balance of the two sides of the housing 25. The middle part 252 is made for flexible material, the lateral part 251 is made for the stereoplasm material, is provided with elastic construction 26 in the middle part 252, and the effort of exerting to two lateral parts 251 can make middle part 252 elasticity open and make the relative contained angle grow of two lateral parts 251, and when the effort that adds disappeared, middle part 252 is original state under elastic construction 26's spring action down for the relative contained angle of two lateral parts 251 diminishes, and so, the neck portion 2 of hanging is worn and can not drop on user's neck.

Specifically, as shown in fig. 6, the elastic structure 26 is composed of a middle rod 261 and two side rods 262, the two side rods 262 are respectively hinged on two sides of the middle rod 261, and a torsion spring 263 is arranged between the middle rod 261 and each of the two side rods 262; two side bars 262 are fixed on the two side portions 251, respectively; the two side rods 262 are consistent in deflection angle relative to the middle rod 261 by the aid of the synchronizing mechanism, so that the situation that the torsion springs 263 on one side fail in advance due to long-term inconsistency of stress of the torsion springs 263 on the two sides after long-term use is avoided, and use stability can be improved. The synchronous mechanism comprises a synchronous belt assembly and a gear 267, the synchronous belt assembly comprises a synchronous belt 264, a first synchronous wheel 265 and a second synchronous wheel 266, one group of synchronous belt assemblies and the gear 267 are arranged corresponding to each side rod 262, namely, two groups of synchronous belt assemblies and two gears 267 are arranged in total, and the gear 267 corresponding to the same side rod 262 is fixedly arranged with the second synchronous wheel 266. The first synchronizing wheel 265 is fixed with respect to the intermediate lever 261, said second synchronizing wheel 266 being rotatably arranged with respect to the intermediate lever 261, the two gears 267 corresponding to the two side levers 262 being mutually meshed. In this way, the two side rods 262 can be rotated synchronously with respect to the intermediate rod 261 by means of the two meshing gears 267.

The wearing unit 12 is an elastic string, and the wearing unit 12 is adjustable in length in actual use so that the mask body 1 can be applied to different users because the shapes of the faces of the users are different, specifically, a first end of the wearing unit 12 is directly fixed to the mask body 11, and a second end of the wearing unit 12 is attached to the mask body 1 through the accommodating unit 4.

As shown in fig. 7, the storing and releasing device 4 includes a device base 41 and a rotating base 42, the device base 41 is fixed on the breathing mask 11, the device base 41 is provided with a rotating shaft portion 43, and the rotating base 42 can rotate relative to the device base 41 and can slide in the axial direction of the rotating shaft portion 43; a plurality of comb-tooth parts 44 arranged in a circumferential array are formed at the peripheral edge of the rotating seat 42, and the comb-tooth parts 44 extend towards the device seat 41; a spring 45 is arranged between the rotating shaft part 43 and the rotating seat 42, and the spring 45 enables the rotating seat 42 to have a moving trend approaching the device seat 41; the rotating base 42 is further provided with a winding portion 46, the second end of the wearing portion 12 is wound around the winding portion 46, the winding portion 46 is rotatable with the rotating base 42, and the winding portion 46 is fixed in the axial direction. In the initial state, the end of the comb teeth 44 is in contact with the device base 41, and when the length of the wearing portion 12 needs to be adjusted by the wearer, the wearing portion 12 can be paid out from the winding portion 46 or the wearing portion 12 can be wound around the winding portion 46 by simply pulling the rotation base 42 outward so that the end of the comb teeth 44 is separated from the device base 41 and rotating the device base 41, and after the winding is completed, the wearing portion 12 is inserted between some two adjacent comb teeth 44, and then the rotation base 42 is released to return to the initial state.

According to the control method of the medical portable respirator and the medical portable respirator, the operation of the air pump can be adjusted according to typical breathing parameters and breathing state data of a user to adjust enough air for the user, and compared with a scheme of enabling the air pump to rotate at a constant speed, the scheme can reduce the power consumption of the air pump and obviously improve the endurance of the respirator.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. A control method of a medical portable respirator is characterized by being applied to a control system of the medical portable respirator, and the method comprises the following steps:

acquiring typical breathing parameters of a user;

acquiring real-time respiratory state data of a user;

2. The method for controlling the medical portable ventilator according to claim 1, wherein the obtaining of typical breathing parameters of the user comprises:

3. The method for controlling a medical portable ventilator according to claim 2, wherein the acquiring real-time respiration status data of a user comprises:

acquiring real-time data of the respiratory state monitoring sensor;

4. The method for controlling a portable medical ventilator according to claim 3, wherein the obtaining of the real-time air supply amount according to the typical respiration parameter and the respiration status data comprises:

5. The method for controlling the portable medical ventilator according to claim 1, wherein the adjusting the rotation speed of the air pump according to the real-time air supply amount comprises:

6. A medical portable ventilator characterized by comprising a controller for executing a control method of the medical portable ventilator according to any one of claims 1 to 5; further comprising:

a respiratory mask for covering the mouth-nose portion of a user;