CN107913449B - Piston type respirator and control method thereof - Google Patents
Piston type respirator and control method thereof Download PDFInfo
- Publication number
- CN107913449B CN107913449B CN201711426843.8A CN201711426843A CN107913449B CN 107913449 B CN107913449 B CN 107913449B CN 201711426843 A CN201711426843 A CN 201711426843A CN 107913449 B CN107913449 B CN 107913449B
- Authority
- CN
- China
- Prior art keywords
- breathing
- piston
- tidal volume
- motor
- motor assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 15
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 115
- 210000004072 lung Anatomy 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 230000033001 locomotion Effects 0.000 claims abstract description 15
- 230000008859 change Effects 0.000 claims abstract description 9
- 230000000241 respiratory effect Effects 0.000 claims description 10
- 238000010171 animal model Methods 0.000 claims description 9
- 230000036391 respiratory frequency Effects 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000030279 gene silencing Effects 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 3
- 230000003434 inspiratory effect Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 28
- 241001465754 Metazoa Species 0.000 description 17
- 230000008569 process Effects 0.000 description 6
- 230000036387 respiratory rate Effects 0.000 description 6
- 239000003814 drug Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 230000037396 body weight Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000005399 mechanical ventilation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 208000004756 Respiratory Insufficiency Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001574 biopsy Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 201000004193 respiratory failure Diseases 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0057—Pumps therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2230/00—Measuring parameters of the user
- A61M2230/40—Respiratory characteristics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2230/00—Measuring parameters of the user
- A61M2230/40—Respiratory characteristics
- A61M2230/42—Rate
Abstract
The invention discloses a piston type breathing machine which comprises a cylinder piston mechanism, a breathing motor assembly used for driving the cylinder piston mechanism, a tidal volume motor assembly used for driving the breathing motor assembly, an exhaust assembly used for exhausting air and a controller used for coordinately controlling the movement of each assembly and detecting various feedback signals. Compared with the traditional piston type breathing machine, the piston type breathing machine can realize two modes of volume control and pressure control, and has the advantages of more accurate control, high regulation efficiency and wider application range. When the pressure needs to be adjusted, the tidal volume is preset according to set parameters, the gas volume to be injected when the pressure reaches a preset value is calculated by measuring the relation between the gas volume injected in an inspiration phase and the pressure change of the lung, the number of times of adjustment required for reaching the target pressure is greatly reduced, the preset pressure value can be reached for 2-3 times, and the adjustment efficiency is greatly improved.
Description
Technical Field
The invention belongs to the technical field of scientific research and animal medical treatment, and relates to a breathing machine, in particular to a piston type breathing machine and a control method thereof.
Background
With the development of medical electronic technology, the types and forms of ventilators are more and more, and the performance is more and more perfect. A ventilator is a tool for performing mechanical ventilation for improving oxygenation and ventilation, supporting respiratory and circulatory functions, and for the treatment of respiratory failure in a patient or experimental animal. The animal breathing machine is an important device widely applied to scientific research experiments such as basic medicine, clinical medicine, animal medicine and the like, is an important support means in the process of manufacturing an animal model, is often subjected to abnormal breathing of animals in the processes of medicine experiments and animal biopsy experiments, and helps the animals to recover normal breathing in a manual assistance mode such as the animal breathing machine so as to enable the experiments to be carried out smoothly.
Among numerous breathing machine types, the present comparatively common breathing machine is piston breathing machine, thereby produces mechanical ventilation through electric drive piston reciprocating motion, and its specific working process is: the breathing stage buffers outside air or gas in the breathing pipeline into the internal space of the piston, meanwhile, gas inside the animal body is exhausted out of the body through the exhaust channel, and the breathing stage presses the gas inside the piston into the lung of the animal. The internal pressure of the expanded lung is increased in the process of pressing gas into the lung, but the existing breathing machine has the problem of poor controllability, if the gas is injected too much, the over-pressure condition can occur to damage the lung, and if the gas is injected too little, the condition of insufficient oxygen supply can be caused, so that the health of animals is influenced. The breathing machine generally comprises a volume control mode and a pressure control mode, and the piston type breathing machine is mainly in the volume control mode generally, namely, the volume of gas injected in each breathing is fixed and unchanged according to a set value, so that the condition that the gas pressure in the lung is over-pressure or under-pressure when animal signs are changed exists; the pressure control mode takes the set pressure as the control target of the respirator, and if the peak lung pressure is not in the set value range in the breathing process, the amount of gas injected into the lung can be automatically adjusted to enable the lung pressure to reach the set requirement.
At present, the pressure value is generally adjusted by algorithms such as PID (proportion integration differentiation) and the like during control of a pressure control mode of the piston type breathing machine, namely the tidal volume of breathing is adjusted by comparing the pressure values of several times of breathing, so that the inspiratory pressure is changed until the target pressure is reached.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems, and provides the piston type breathing machine and the control method thereof, wherein the piston type breathing machine is high in accuracy, short in adjusting time and high in efficiency.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the invention provides a piston type respirator, which comprises:
a cylinder-piston mechanism for storing and providing gas;
the breathing motor assembly is connected with the cylinder piston mechanism and is used for driving the cylinder piston mechanism to reciprocate;
the tidal volume motor assembly is connected with the breathing motor assembly and is used for driving the breathing motor assembly to move so as to change the stroke of the cylinder piston;
the exhaust assembly is connected with the cylinder piston mechanism and used for controlling the emission of the lung gas of the experimental subject;
and the control unit is electrically connected with the cylinder piston mechanism, the breathing motor assembly, the tidal volume motor assembly and the exhaust assembly and is used for coordinating the movement of each mechanism and assembly and detecting a feedback signal.
Preferably, the device further comprises a back plate, wherein the cylinder piston mechanism, the breathing motor assembly, the tidal volume motor assembly and the exhaust assembly are all mounted on the back plate, and the breathing motor assembly can move relative to the back plate.
Preferably, the breathing motor assembly comprises a connecting shaft connected with a piston in the cylinder piston, a breathing motor used for driving the connecting shaft, and a motor mounting plate used for mounting the breathing motor, and the breathing motor drives the piston to reciprocate by driving the connecting shaft to rotate.
Preferably, the tidal volume motor assembly comprises a motor slide rail, a slide block connected to the motor slide rail and a tidal volume motor used for driving the slide block to slide along the motor slide rail, the slide block is connected with the breathing motor assembly at the same time, the slide block moves along the motor slide rail to drive the breathing motor assembly to move, the inclination angle of the breathing motor assembly relative to the cylinder piston is changed, and the piston stroke is changed.
Preferably, the backplate includes side wall board and bottom plate, cylinder piston mechanism exhaust assembly install in the side wall board, the breathing motor subassembly tidal volume motor unit mount in the bottom plate.
Preferably, the sliding block is connected with the motor mounting plate through a rotating shaft, so that the breathing motor is driven to move relative to the bottom plate.
Preferably, the exhaust assembly comprises a high-speed electromagnetic valve, a damping and silencing support, an air inlet interface, an air outlet interface and an air path connecting hose, an air outlet of the air cylinder piston mechanism is connected to the air inlet interface of the experimental subject lung and the exhaust assembly through an air path and the air path connecting hose, the air inlet interface is connected to an air inlet of the high-speed electromagnetic valve through an air path, an air outlet of the high-speed electromagnetic valve is connected to the air outlet interface through an air path connecting hose, and the high-speed electromagnetic valve is controlled to be switched on and off.
The invention also provides a control method of the piston type breathing machine, which comprises the following steps:
s1, after the target pressure setting is changed, the high-speed electromagnetic valve is switched off, the exhaust stage is started, and the tidal volume V is preset according to the set respiratory frequency, the experimental animal respiratory frequency and tidal volume calculation formula and the experimental datapreThe tidal volume value is 1.5 times of the larger value in theoretical calculation or experimental data, so that the lung pressure can reach the preset pressure value in an inspiration period, and the tidal volume motor assembly is controlled to move, so that the tidal volume when the piston moves to the maximum position is Vpre；
S2, after the tidal volume setting is finished, the control unit detects that the breathing changes to the breathing position signal, and the gas volume stored in the piston is V at the momentpreWhen the initial inspiration timer t is 0, closing the high-speed electromagnetic valve and starting timing, the breathing motor continuously operates to enter an inspiration phase, the gas stored in the cylinder is pressed into the lung, and the air pressure of the lung is increased along with the gas;
s3, detecting the change of the lung pressure in real time, recording inspiration time t when detecting that the lung pressure of the experimental object reaches preset pressure, opening a high-speed electromagnetic valve to exhaust, converting the inspiration period into an exhaust period, and meanwhile calculating the amount V of gas entering the lung during inspiration to be Vpre*t/T1，T1Calculating the actually required tidal volume V for the inspiration time set for the current respiratory frequency, namely the time of the respiratory motor running for a half cycle, and controlling the movement of the tidal volume motor component to ensure that the tidal volume when the piston moves to the maximum position is V;
and S4, adjusting the position of the tidal volume motor assembly according to the detected peak pressure and the target pressure in the following respiratory cycle, so that the lung pressure can be stabilized near the target pressure.
Preferably, the tidal volume motor assembly is used for an inspiration period when the operating angle is greater than or equal to 0 degrees and less than or equal to 180 degrees, the tidal volume motor assembly is used for an expiration period when the operating angle is greater than or equal to 180 degrees and less than or equal to 360 degrees, and the position signal is fed back to the control unit when the operating angle is greater than or equal to 0 degrees and less than or equal to 180 degrees.
Preferably, in step S1, the respiratory rate calculation formula is a respiratory rate of 53.5 × M-0.26The tidal volume is calculated by the formula 6.2M1.01Wherein M is the body weight of the subject.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the piston type breathing machine comprises a cylinder piston mechanism, a breathing motor assembly for driving the cylinder piston mechanism, a tidal volume motor assembly for driving the breathing motor assembly, an exhaust assembly for controlling the discharge of air in the lung of an experimental subject, and a controller for coordinating and controlling the movement of the assemblies and detecting various feedback signals (such as the lung pressure of the experimental subject, the running position of the motor and the like). Piston breathing machine adjusts through pressure control mode or capacity control mode, compares with traditional piston breathing machine, and its control is more accurate, can significantly reduce under this breathing machine pressure control mode and reach the number of times that target pressure needs to be adjusted, generally can make the target pressure value reach the setting value through 2-3 times regulation, and it is efficient to adjust, and application scope is wider, even if also can reach preset pressure value in the short time to the animal that respiratory frequency is slow, has improved experimental efficiency, and is more favourable to animal health.
(2) According to the control method of the piston type breathing machine, when the pressure needs to be adjusted, a larger tidal volume is preset according to set parameters, the gas volume needing to be injected when the pressure reaches the preset value is found by measuring the change relation between the gas volume injected in the inspiration phase and the pressure of the lung, when the pressure exceeds the preset value, the exhaust assembly is controlled to be in the exhaust state to finish the breathing adjustment, the pressure is reduced, and meanwhile, the stroke of the piston mechanism of the air cylinder is adjusted to enable the gas volume injected next time to be the gas volume injected in the breathing at this time, so that the number of times of adjustment required for reaching the target pressure can be greatly reduced, the preset pressure value can be reached for 2-3 times, and the adjustment efficiency is greatly improved.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic diagram of a piston-type breathing apparatus according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of the piston-type breathing machine according to the embodiment of the invention.
The reference numbers in the figures denote: 1-a cylinder piston mechanism; 2-a breathing motor assembly; 21-a connecting shaft; 22-a breathing motor; 23-a motor mounting plate; 3-a tidal volume motor assembly; 31-motor slide rail; 32-a slide block; 33-tidal volume motor; 4-an exhaust assembly; 41-high speed electromagnetic valve; 42-shock absorbing and silencing support; 5-side wall panels; 6-bottom plate.
Detailed Description
Examples
The present embodiment provides a piston type ventilator, as shown in fig. 1, including:
the device comprises a cylinder piston mechanism 1, wherein the cylinder piston mechanism 1 comprises a cylinder and a piston arranged in the cylinder, the piston rotates and linearly reciprocates in the cylinder under the action of driving force, and the cylinder piston mechanism 1 is used for storing fresh gas during expiration and pressing the stored gas into the lung of an experimental animal (animal) during inspiration of the experimental animal;
the breathing motor component 2 is connected with the cylinder piston mechanism 1 and used for driving a piston in the cylinder piston mechanism 1 to reciprocate along the axial direction of the cylinder;
the tidal volume motor assembly 3 is connected with the breathing motor assembly 2 and is used for driving the breathing motor assembly 2 to move so as to drive the piston in the cylinder piston assembly 1 to move, and therefore the stroke of the piston in the cylinder piston mechanism 1 is changed;
the exhaust assembly 4 is connected with the cylinder piston mechanism 1 and the lung of the experimental animal through a hose and is used for controlling the discharge of the gas of the lung of the experimental object in the breathing process;
the control unit is electrically connected with the cylinder piston mechanism 1, the breathing motor assembly 2, the tidal volume motor assembly 3 and the exhaust assembly 4 and is used for coordinating the movement of each mechanism and assembly and detecting feedback signals, and the control unit is an embedded control module;
a backplate, it is used for installing cylinder piston mechanism 1, breathing motor subassembly 2, tidal volume motor unit 3 and exhaust subassembly 4, and breathing motor subassembly 2 can be relative the backplate motion, the backplate includes lateral wall board 5 and bottom plate 6, cylinder piston mechanism 1 and exhaust subassembly 4 install in lateral wall board 5, breathing motor subassembly 2 with tidal volume motor unit 3 install in bottom plate 6, just breathing motor subassembly 2 can be relative bottom plate 6 moves.
Specifically, breathing motor subassembly 2 include with connecting axle 21, the drive that is used for of piston connection in the cylinder piston mechanism 1 breathing motor 22, the installation that is used for of connecting axle 21 motion breathing motor 22's motor mounting panel 23, breathing motor 22 control reciprocating motion is done to the piston, and then control experimental animals's respiratory frequency, breathing motor 22 is every rotatory a week, and the piston comes and goes once, accomplishes a breathing. The driving principle is that the driving motor 22 is connected with the piston through the connecting shaft 21, a certain inclination angle is formed between the connecting shaft 21 and the piston, the driving motor 22 drives the connecting shaft 21 to rotate so as to drive the piston to move back and forth, the inclination angle between the connecting shaft 21 and the piston can be adjusted through the tidal volume motor assembly, and the larger the inclination angle is, the larger the stroke of the piston in motion is, and the larger the tidal volume is.
The tidal volume motor assembly 3 comprises a motor slide rail 31, a slide block 32 which is connected with the motor slide rail 31 and can do linear reciprocating motion relative to the motor slide rail 31, and a tidal volume motor 33 which is arranged at one end of the motor slide rail 31 and is used for driving the slide block 32 to move along the motor slide rail 31, the slide block 32 is connected with the breathing motor component 2 at the same time, and the movement of the slide block 32 drives the breathing motor component 2 to move, specifically, as shown, the respiratory motor assembly 2 and the tidal volume motor assembly 3 are arranged oppositely at a certain inclination angle, the sliding block 32 is connected with the motor mounting plate 23 through a rotating shaft, the sliding block 32 moves to pull or push the motor mounting plate 23 to slide relative to the bottom plate 6, therefore, the inclination angle of the connecting shaft 21 in the breathing motor component relative to the piston of the cylinder is changed, the stroke of the piston is changed, and the aim of adjusting the tidal volume is fulfilled.
The exhaust assembly 4 comprises a high-speed electromagnetic valve 41, a damping and silencing support 42, an air inlet interface, an air outlet interface and an air path connecting hose, an air outlet of the air cylinder piston mechanism is connected to the air inlet interface of the experimental animal lung and the exhaust assembly through an air path and the air path connecting hose, the air inlet interface is connected to an air inlet of the high-speed electromagnetic valve 41 through an air path, an air outlet of the high-speed electromagnetic valve 41 is connected to the air outlet interface through the air path connecting hose, and the high-speed electromagnetic valve 41 is controlled to be switched on and off. When the high-speed electromagnetic valve 41 is closed, the cylinder piston mechanism 1 presses the gas stored in the piston into the animal lung in the inspiration period, and the pressure of the lung is increased; when the high-speed electromagnetic valve 41 is opened, if the pressure of the lung is higher than the atmospheric pressure, the gas in the lung is exhausted to the atmosphere from the air outlet port through the electromagnetic valve; the control unit controls the high-speed electromagnetic valve 41 of the exhaust assembly 4 by detecting the breathing state and the lung pressure state, so that the animal can breathe regularly, and meanwhile, the damage caused by the overlarge lung pressure is avoided.
The embodiment also provides a control method of the piston type breathing machine, which comprises the following steps:
s1, controlling an inspiration position and an expiration position through the operation angle of a breathing motor 22 in the breathing motor component 2, presetting the operation angle of the breathing motor 22 as an inspiration period when r is larger than or equal to 0 degrees and smaller than or equal to 180 degrees, presetting the operation angle of the breathing motor 22 as an expiration period when r is larger than or equal to 180 degrees and smaller than or equal to 360 degrees, feeding back a position signal to a control unit when the operation angle of the breathing motor 22 is 0 degrees and 180 degrees, presetting a target breathing peak pressure, wherein the target breathing peak pressure is 20cmH in the embodiment2O, the respiratory rate of the subject is 60BPM, the respiratory ratio is 1:1 (parameters are set by the device operator according to the physiological characteristics of the subject, such as the species and weight of the animal), that is, the inspiration time and expiration time of each respiratory cycle of the subject are the same, which are 500ms in this embodiment;
after the target pressure setting is changed, the high-speed electromagnetic valve is disconnected, the exhaust stage is started,the control unit controls the tidal volume motor assembly 3 to preset a volume V of the cylinder piston according to the weight, the respiratory rate and other experimental data of the experimental targetpreThe tidal volume of (1) (the value is calculated by using big mouse as a model and according to the respiratory rate and the tidal volume, the respiratory rate is 53.5M-0.26Tidal volume 6.2M1.01(M ═ body weight, kg) was obtained in combination with experimental data, and on this basis the preset value was increased by a factor of 1.5 to ensure that the lung pressure reached the set peak respiratory pressure during one inhalation cycle and to control the exhaust assembly 4 to be in the exhaust state.
S2, judging whether an inspiration position signal (namely a signal fed back when the operation angle of the breathing motor 22 is 0 degrees) is detected by using the control unit, if the inspiration position signal is detected, starting and initializing an inspiration timer to enable inspiration time t to return to zero, if the inspiration position signal is not detected, continuously controlling the breathing motor 22 to operate until the position signal is detected, and if the signal is not detected after time out, indicating abnormity.
S3, when a breath-to-suction position signal is detected, the high-speed solenoid valve of the exhaust component 4 is controlled to be closed to enable the other lung parts not to be exhausted, at the moment, the breathing motor 22 operates continuously to press the gas stored in the cylinder piston mechanism 1 into the lung parts, the change of the lung pressure of the experimental object is detected in real time in the state of suction, and whether the lung pressure reaches the preset breathing pressure of 20cmH or not is judged2And O, if the preset breathing pressure is reached, recording the inspiration time t at the moment, and controlling the exhaust assembly 4 to be in an exhaust state to enable the breathing of the experimental target to enter an expiration stage. According to the time T of the inspiratory cycle of the operation of the respiratory motor 221(this time is the time the piston moves from one end of the cylinder to the other), the volume of gas injected into the lungs, V ═ V, is calculatedpre*t/T1The breathing motor 22 operates at a constant speed during inspiration and expiration, and the tidal volume motor assembly is adjusted according to the calculation result to output a tidal volume of V to Vpre*t/T1Thus, the amount of gas injected in the next inspiration period is the preset breathing pressure of 20cmH when the pressure reaches the current inspiration2The gas quantity in O time realizes the purpose of rapid pressure control.
And S4, in the next breathing cycle, according to the detected peak pressure, properly adjusting the position of the tidal volume motor assembly in combination with the target pressure (when the pressure is smaller, the tidal volume is increased, when the pressure is larger, the tidal volume is reduced, and the adjustment amount is determined according to the percentage of the pressure difference, the current tidal volume, the data of the actually-measured tidal volume change and the pressure change), so that the lung pressure can be stabilized near the target pressure.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A piston ventilator, comprising:
a cylinder-piston mechanism for storing and providing gas;
the breathing motor assembly is connected with the cylinder piston mechanism and is used for driving the cylinder piston mechanism to reciprocate;
the tidal volume motor assembly is connected with the breathing motor assembly and is used for driving the breathing motor assembly to move so as to change the stroke of the cylinder piston;
the exhaust assembly is connected with the cylinder piston mechanism and used for controlling the emission of the lung gas of the experimental subject;
and the control unit is electrically connected with the cylinder piston mechanism, the breathing motor assembly, the tidal volume motor assembly and the exhaust assembly and is used for coordinating the movement of each mechanism and assembly and detecting a feedback signal.
2. The piston respirator as set forth in claim 1 further comprising a back plate comprising a side wall plate and a bottom plate; the cylinder piston mechanism, the breathing motor assembly, the tidal volume motor assembly and the exhaust assembly are all installed on the back plate, and the breathing motor assembly can move relative to the bottom plate.
3. The piston-type breathing machine according to claim 2, wherein the breathing motor assembly comprises a connecting shaft connected with the piston in the cylinder piston, a breathing motor for driving the connecting shaft, and a motor mounting plate for mounting the breathing motor, and the breathing motor drives the piston to reciprocate by driving the connecting shaft to rotate.
4. The piston-type breathing machine as claimed in claim 3, wherein the tidal volume motor assembly comprises a motor slide rail, a slider connected to the motor slide rail, and a tidal volume motor for driving the slider to slide along the motor slide rail, the slider is connected to the breathing motor assembly, the slider moves along the motor slide rail to drive the breathing motor assembly to move, and the inclination angle of the breathing motor assembly relative to the piston of the cylinder is changed, so that the stroke of the piston is changed.
5. The piston respirator of claim 4, wherein the cylinder-piston mechanism, the exhaust assembly are mounted to the side wall plate, and the breathing motor assembly, the tidal volume motor assembly are mounted to the base plate.
6. The piston respirator as set forth in claim 5 wherein said slider is pivotally connected to said motor mounting plate for driving movement of said breathing motor relative to said base plate.
7. The piston-type respirator of claim 6, wherein the exhaust assembly comprises a high-speed solenoid valve, a damping and silencing support, an air inlet interface, an air outlet interface and an air path connecting hose, the air outlet of the cylinder piston mechanism is connected to the air inlet interface of the experimental subject lung and the exhaust assembly through an air path and the air path connecting hose, the air inlet interface is connected to the air inlet of the high-speed solenoid valve through an air path, the air outlet of the high-speed solenoid valve is connected to the air outlet interface through the air path connecting hose, and the high-speed solenoid valve is controlled to be switched on and off through a control unit.
8. The piston respirator as claimed in any one of claims 1 to 7, wherein the method of controlling the piston respirator comprises the steps of:
s1, after the target pressure setting is changed, the high-speed electromagnetic valve is switched off, the exhaust stage is started, and the tidal volume V is preset according to the set respiratory frequency, the experimental animal respiratory frequency and tidal volume calculation formula and the experimental datapreThe tidal volume value is 1.5 times of the larger value in theoretical calculation or experimental data, so that the lung pressure can reach the preset pressure value in an inspiration period, and the tidal volume motor assembly is controlled to move, so that the tidal volume when the piston moves to the maximum position is Vpre；
S2, after the tidal volume setting is finished, the control unit detects that the breathing changes to the breathing position signal, and the gas volume stored in the piston is V at the momentpreWhen the initial inspiration timer t is 0, closing the high-speed electromagnetic valve and starting timing, the breathing motor continuously operates to enter an inspiration phase, the gas stored in the cylinder is pressed into the lung, and the air pressure of the lung is increased along with the gas;
s3, detecting the change of the lung pressure in real time, recording inspiration time t when detecting that the lung pressure of the experimental object reaches preset pressure, opening a high-speed electromagnetic valve to exhaust, converting the inspiration period into an exhaust period, and meanwhile calculating the amount V of gas entering the lung during inspiration to be Vpre*t/T1，T1Calculating the actually required tidal volume V for the inspiration time set for the current respiratory frequency, namely the time of the respiratory motor running for a half cycle, and controlling the movement of the tidal volume motor component to ensure that the tidal volume when the piston moves to the maximum position is V;
and S4, adjusting the position of the tidal volume motor assembly according to the detected peak pressure and the target pressure in the following respiratory cycle, so that the lung pressure can be stabilized near the target pressure.
9. The piston respirator as claimed in claim 8 wherein the tidal volume motor assembly operating angle of 0 ° r 180 ° is an inspiratory cycle, the tidal volume motor assembly operating angle of 180 ° r 360 ° is an expiratory cycle, and the tidal volume motor assembly operating angles of 0 ° and 180 ° are feedback position signals to the control unit.
10. The piston respirator of claim 9, further comprising feedback to the control unit of the breath-to-breath signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711426843.8A CN107913449B (en) | 2017-12-22 | 2017-12-22 | Piston type respirator and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711426843.8A CN107913449B (en) | 2017-12-22 | 2017-12-22 | Piston type respirator and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107913449A CN107913449A (en) | 2018-04-17 |
| CN107913449B true CN107913449B (en) | 2021-01-08 |
Family
ID=61894336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711426843.8A Active CN107913449B (en) | 2017-12-22 | 2017-12-22 | Piston type respirator and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107913449B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111493875A (en) * | 2018-07-25 | 2020-08-07 | 佛山市丈量科技有限公司 | Physiological parameter sensing system and intelligent seat equipped with same |
| CN109172986A (en) * | 2018-10-15 | 2019-01-11 | 福建中医药大学附属人民医院（福建省人民医院） | A kind of auxiliary sounding device and bionical vocal technique |
| CN109620463A (en) * | 2019-01-29 | 2019-04-16 | 青岛大学 | A kind of self-action animal assisted respirator |
| CN111588956A (en) * | 2020-06-03 | 2020-08-28 | 华中科技大学同济医学院附属协和医院 | Portable electric breathing air bag |
| CN111880842B (en) * | 2020-06-22 | 2023-08-22 | 东北大学 | Method and device for switching instructions, electronic equipment and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2243910Y (en) * | 1996-02-02 | 1997-01-01 | 季桂芳 | Emergency respirator |
| US6142150A (en) * | 1998-03-24 | 2000-11-07 | Nellcor Puritan-Bennett | Compliance compensation in volume control ventilator |
| CN201055619Y (en) * | 2007-06-07 | 2008-05-07 | 中钢集团武汉安全环保研究院 | Respiration simulator |
| CN101310785A (en) * | 2007-12-28 | 2008-11-26 | 北京谊安医疗系统股份有限公司 | Electric resuscitator mode control devices and methods thereof |
| CN202605471U (en) * | 2012-06-27 | 2012-12-19 | 沈阳迈思医疗科技有限公司 | Device for actively simulating human body respiration |
| CN103071217A (en) * | 2013-02-07 | 2013-05-01 | 天津市医疗器械质量监督检验中心 | Standard sine wave air flow generator for testing breathing machine and anesthetizing system |
| CN206075672U (en) * | 2016-08-11 | 2017-04-05 | 青岛众瑞智能仪器有限公司 | A kind of sine curve breathes analog |
| CN206524094U (en) * | 2017-02-21 | 2017-09-26 | 吉林大学 | A kind of simulated respiration apparatus of oxygen supply of lung transplantation |
-
2017
- 2017-12-22 CN CN201711426843.8A patent/CN107913449B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2243910Y (en) * | 1996-02-02 | 1997-01-01 | 季桂芳 | Emergency respirator |
| US6142150A (en) * | 1998-03-24 | 2000-11-07 | Nellcor Puritan-Bennett | Compliance compensation in volume control ventilator |
| CN201055619Y (en) * | 2007-06-07 | 2008-05-07 | 中钢集团武汉安全环保研究院 | Respiration simulator |
| CN101310785A (en) * | 2007-12-28 | 2008-11-26 | 北京谊安医疗系统股份有限公司 | Electric resuscitator mode control devices and methods thereof |
| CN202605471U (en) * | 2012-06-27 | 2012-12-19 | 沈阳迈思医疗科技有限公司 | Device for actively simulating human body respiration |
| CN103071217A (en) * | 2013-02-07 | 2013-05-01 | 天津市医疗器械质量监督检验中心 | Standard sine wave air flow generator for testing breathing machine and anesthetizing system |
| CN206075672U (en) * | 2016-08-11 | 2017-04-05 | 青岛众瑞智能仪器有限公司 | A kind of sine curve breathes analog |
| CN206524094U (en) * | 2017-02-21 | 2017-09-26 | 吉林大学 | A kind of simulated respiration apparatus of oxygen supply of lung transplantation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107913449A (en) | 2018-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107913449B (en) | Piston type respirator and control method thereof | |
| US20190060592A1 (en) | Electrically Operable Resuscitators | |
| US5931159A (en) | Lung ventilator | |
| US11229763B2 (en) | Mechanical ventilator with oxygen concentrator | |
| EP2075656B1 (en) | Electrical actuator used as a fluid pressure cylinder | |
| US20090241953A1 (en) | Ventilator with piston-cylinder and buffer volume | |
| CN102114293B (en) | Control system and method for implementing double horizontal pressures in air passage, breathing machine and anaesthetic machine | |
| US11135392B2 (en) | Mechanical ventilator | |
| CN1849150A (en) | Insufflation-exsufflation system with percussive assist for removal of broncho-pulmonary secretions | |
| CN101244307A (en) | Mobile medical ventilator | |
| CN111511430B (en) | Medical ventilator system and method for providing respiratory support to a patient | |
| CN101468223B (en) | Method for improving working accuracy of PEEP valve | |
| CN104667401A (en) | Breathing system based on blowers and control method | |
| WO2021203189A1 (en) | Portable piston icu ventilator | |
| US11359733B2 (en) | Check valve | |
| CN209900034U (en) | Cardiopulmonary resuscitation device with closed-loop control | |
| CN110464945A (en) | A kind of system of high frequency respirator, ventilation control method and device | |
| CN204655706U (en) | Based on the respiratory system of air blast | |
| CN213609089U (en) | Breathing machine | |
| CN210135063U (en) | Piston type compressor | |
| CN114306868B (en) | A purifier and breathing machine for department of respiration | |
| CN210963441U (en) | Active respiration control device of anesthesia respirator | |
| WO2023249906A1 (en) | Clamping valve assembly for a ventilator | |
| CN113813483B (en) | Breathing machine with air return treatment function | |
| US20220226588A1 (en) | Medical ventilator having in-series piston pumps |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A piston ventilator and its control method Effective date of registration: 20210709 Granted publication date: 20210108 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: RWD LIFE SCIENCE Co.,Ltd. Registration number: Y2021980005932 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220923 Granted publication date: 20210108 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: RWD LIFE SCIENCE Co.,Ltd. Registration number: Y2021980005932 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A Piston Ventilator and Its Control Method Effective date of registration: 20220929 Granted publication date: 20210108 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: RWD LIFE SCIENCE Co.,Ltd. Registration number: Y2022980016982 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231011 Granted publication date: 20210108 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: RWD LIFE SCIENCE Co.,Ltd. Registration number: Y2022980016982 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A piston type ventilator and its control method Effective date of registration: 20231020 Granted publication date: 20210108 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: RWD LIFE SCIENCE Co.,Ltd. Registration number: Y2023980062091 |