CN110464948B - Control method and device of high-frequency oscillation module and high-frequency respirator - Google Patents

Control method and device of high-frequency oscillation module and high-frequency respirator Download PDF

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CN110464948B
CN110464948B CN201910807727.3A CN201910807727A CN110464948B CN 110464948 B CN110464948 B CN 110464948B CN 201910807727 A CN201910807727 A CN 201910807727A CN 110464948 B CN110464948 B CN 110464948B
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amplitude
frequency
oscillation module
frequency oscillation
pressure
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CN110464948A (en
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陈再宏
陈超
俞永伟
朱好生
张伟杰
刘广清
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Ningbo David Medical Device Co Ltd
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Ningbo David Medical Device Co Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
    • A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1005—Preparation of respiratory gases or vapours with O2 features or with parameter measurement
    • A61M2016/102—Measuring a parameter of the content of the delivered gas
    • A61M2016/1025—Measuring a parameter of the content of the delivered gas the O2 concentration

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  • Engineering & Computer Science (AREA)
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  • Heart & Thoracic Surgery (AREA)
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  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
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  • Respiratory Apparatuses And Protective Means (AREA)
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Abstract

The invention provides a control method and device of a high-frequency oscillation module and a high-frequency respirator, and relates to the technical field of respirators. The control method of the high-frequency oscillation module comprises the following steps: acquiring the rotation parameter of the turbo fan and the pressure of the patient end in real time; determining an amplitude change interval of the high-frequency oscillation module according to the rotation parameters of the turbo fan and the pressure of the patient end; performing amplitude rising control on the high-frequency respirator in an amplitude change interval; when the pressure at the patient end reaches a set condition, the high-frequency respirator stops executing amplitude increasing control; and controlling the high-frequency oscillation module according to the amplitude and the oscillation frequency. According to the control method of the high-frequency oscillation module, amplitude increasing control is carried out on the high-frequency oscillation module, the pressure at the end of a patient is obtained, and when the rotating speed of the turbofan changes, the amplitude is confirmed again, so that amplitude increasing control of the respirator is realized, and the risk of air pressure increase caused by unstable work of the turbofan is reduced.

Description

Control method and device of high-frequency oscillation module and high-frequency respirator
Technical Field
The invention relates to the technical field of breathing machines, in particular to a control method and device of a high-frequency oscillation module and a high-frequency breathing machine.
Background
High frequency ventilators are artificial mechanical ventilators designed for patients requiring respiratory support, respiratory therapy, and emergency resuscitation, and typically employ a high pressure gas source to provide artificial mechanical ventilation for patients requiring respiratory support, respiratory therapy, and emergency resuscitation. Because of the requirement on input pressure, the existing high-frequency breathing machine usually adopts compressed air as an air source, and under certain specific rescue environments, the air source is often lacked, and a turbo fan is adopted for driving air, when the rotating speed of the turbo fan changes, if the amplitude of the high-frequency oscillation module is kept unchanged all the time, the phenomenon that the pressure at the patient end is higher can occur.
Disclosure of Invention
The present invention has been made in view of the above-described conventional circumstances, and an object thereof is to provide a method for controlling a high-frequency oscillation module.
To this end, the present invention provides a method for controlling a high-frequency oscillation module, the high-frequency oscillation module being provided in an inspiratory circuit of a high-frequency ventilator, the high-frequency ventilator delivering gas by using a turbo fan, the method comprising:
s1: starting a high-frequency respirator, starting the turbofan, setting the oscillation frequency of the high-frequency oscillation module, and acquiring the rotation parameters of the turbofan and the pressure of a patient end in real time;
s2: determining an amplitude variation interval of the high-frequency oscillation module according to the rotation parameters of the turbo fan and the pressure of the patient end;
s3: carrying out amplitude rising control on the high-frequency respirator in the amplitude change interval;
s4: when the pressure at the patient end reaches a set condition, stopping executing amplitude increasing control by the high-frequency respirator, and simultaneously acquiring the amplitude of the high-frequency oscillation module, namely the calibration amplitude;
s5: and controlling the high-frequency oscillation module according to the calibration amplitude and the oscillation frequency.
Optionally, the banner control comprises:
after the amplitude of the high-frequency oscillation module rises for a set amplitude each time, the high-frequency oscillation module operates at the current amplitude;
and when the high-frequency oscillation module runs for a set time at the current amplitude, the amplitude of the high-frequency oscillation module continues to increase.
Optionally, the value of the set amplitude decreases after each increase of the amplitude of the high-frequency oscillation module by the set amplitude.
Optionally, the amplitude control of the high-frequency ventilator within the amplitude variation interval includes:
dividing the set amplitude into n amplitude steps according to the amplitude change interval;
the amplitude of the high-frequency oscillation module is increased by at least one amplitude step each time.
Optionally, the rotation parameter includes obtaining a rotation speed of the turbo fan in real time.
Optionally, the controlling the high-frequency oscillation module according to the calibration amplitude and the oscillation frequency includes:
confirming the operation amplitude of the high-frequency oscillation module according to the calibration amplitude;
establishing a relationship between the operating amplitude and the oscillation frequency and current through the high frequency oscillation module;
and controlling the high-frequency oscillation module according to the current.
Optionally, the operating amplitude is a difference between the calibrated amplitude and the set amplitude.
Compared with the prior art, the control method of the high-frequency oscillation module provided by the invention has the following advantages:
according to the control method of the high-frequency oscillation module, amplitude increasing control is carried out on the high-frequency oscillation module, when the air pressure in an air path is unstable, amplitude is confirmed again by acquiring the pressure at the patient end when the pressure at the patient end is changed, so that amplitude increasing control of a breathing machine is realized, the high-frequency breathing machine always works in a safe pressure range, and the risk of air pressure increase caused by unstable work of a turbo fan is reduced.
The invention also provides a control device of a high-frequency oscillation module, the high-frequency oscillation module is arranged in an inspiration circuit of a high-frequency respirator, the high-frequency respirator adopts a turbine fan to convey gas, and the control device of the high-frequency oscillation module comprises:
the acquiring unit is used for acquiring the rotation parameters of the turbo fan and the pressure of the patient end in real time;
the calculation unit is used for determining an amplitude change interval of the high-frequency oscillation module according to the rotation parameters of the turbo fan and the pressure of the patient end;
the control unit is used for carrying out amplitude increasing control on the high-frequency respirator in the amplitude change interval and is also used for stopping executing the amplitude increasing control on the high-frequency respirator when the pressure at the patient end is greater than or equal to a set pressure;
the obtaining unit is further used for obtaining the amplitude of the high-frequency oscillation module when the pressure at the patient end reaches a set pressure, namely the calibrated amplitude;
the calculation unit is used for calculating the running amplitude of the high-frequency oscillation module according to the calibrated amplitude;
the control unit is also used for controlling the high-frequency oscillation module according to the operation amplitude.
Compared with the prior art, the control device of the high-frequency oscillation module has the same beneficial effects as the control method of the high-frequency oscillation module, and the description is omitted here.
The invention also provides a high-frequency breathing machine, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the control method of the high-frequency oscillation module.
Compared with the prior art, the high-frequency breathing machine has the advantages that the control method of the high-frequency oscillation module is the same as that of the high-frequency oscillation module, and the description is omitted.
The present invention also provides a computer-readable storage medium storing a computer program, which when read and executed by a processor, implements the control method of the high-frequency oscillation module described in any one of the above.
Compared with the prior art, the beneficial effects of the computer readable storage medium are the same as the control method of the high-frequency oscillation module, and are not repeated herein.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a high frequency ventilator system according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for controlling the high-frequency oscillation module according to the embodiment of the present invention;
fig. 3 is a schematic diagram of a control device for the high-frequency oscillation module according to the embodiment of the present invention.
Description of reference numerals:
1-a control device; 101-an acquisition unit; 102-a control unit; 103-a calculation unit; 2-a proportional valve, 3-a safety valve, 4-a one-way valve, 5-a high-frequency oscillation module, 6-a third pressure flow sensor, 7-a fourth pressure flow sensor, 8-a breather valve, 9-a temperature sensor, 10-a first stop valve, 11-a turbo fan, 12-a pressure flow sensor, 13-a second stop valve, 14-a mixing chamber, 15-a compressed oxygen source, 16-a pressure reducing valve, 17-a check valve, 18-a first pressure flow sensor, 19-a filter, 20-a check valve and 21-an oxygen concentration sensor.
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention is primarily directed to protecting a ventilation control method, and in particular to a method of modifying a ventilation method, which is based on the high frequency ventilator system described in the embodiments herein.
In addition, the directional descriptions of "between" and "between" mentioned in the embodiments of the present invention do not mean between and among the structures, but between and among the gas path relations, and the structures related to the mutual communication are communicated through the pipeline, and furthermore, the descriptions of the words "first" and "second" in the text do not constitute a limitation on the specific number, but are not construed as a limitation on the present invention for the convenience of understanding the simplified description and the distinction of the present invention.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The embodiment provides a high-frequency breathing machine system, which comprises a turbo fan 11, a compressed oxygen source 15, a mixing chamber 14, an inspiration circuit and a high-frequency oscillation module 5, wherein the turbo fan 11 and the compressed oxygen source 15 are respectively communicated with the mixing chamber 14, and the mixing chamber 14 is also communicated with the inspiration circuit; the high-frequency oscillation module 5 is positioned in the inspiration circuit and is suitable for generating oscillation pressure waves for the gas in the inspiration circuit.
The air source and the compressed oxygen source 15 are respectively communicated with an inlet of the mixing chamber 14, and the suction circuit is communicated with an outlet of the mixing chamber 14. Here, a second stop valve 13 is provided between the turbo fan 11 and the mixing chamber 14, and the gas sent from the turbo fan 11 to the mixing chamber 14 is controlled by the second stop valve 13, thereby reducing the risk. A pressure reducing valve 16 is arranged between the compressed oxygen source and the mixing chamber and is used for adjusting the delivery quantity of the compressed oxygen. Furthermore, a pressure-flow sensor 12 is provided between the turbo fan 11 and the mixing chamber 14, and monitors the gas delivered by the turbo fan 11 to the mixing chamber 14.
Here, when the air flows into the patient side, the air and the compressed oxygen are mixed in the mixing chamber 14, and then the mixed gas is delivered to the patient side, on one hand, disturbance of the compressed gas of the turbo fan 11 can be reduced, and a flow slowing effect is achieved, on the other hand, the air and the compressed oxygen are mixed in the mixing chamber 14, so that the distribution of the gas is more even, and in addition, when the temperature of the air delivered by the turbo fan 11 is higher, the compressed oxygen can also absorb the heat of the air delivered by the turbo fan 11.
When the concentration of oxygen to be delivered is lower than 100%, the turbo fan 11 is used for compressing and delivering air to the mixing chamber to mix the air and the compressed oxygen, and the turbo fan 11 provides power for the mixed air to deliver the air to the patient end. When pure oxygen is needed at the patient end, at the moment, the compressed oxygen is decompressed through the decompression valve 16 and then is sent into the air suction loop, one end of the turbo fan 11 communicated with the air is closed, and the delivery turbo fan 11 generates high-pressure airflow at the moment and is used for delivering the oxygen. The high-frequency ventilator system also comprises a filter 19, located between the turbo fan 11 and the mixing chamber 14, adapted to filter the air delivered by the turbo fan 11. On the one hand, impurities in the gas delivered by the turbo fan 11 can be filtered, and on the other hand, the gas delivered by the turbo fan 11 can be subjected to slow flow, so that disturbance of the gas after passing through the filter 19 is reduced. Of course, the filter 19 can also be arranged at the air inlet, i.e. before the turbo fan 11.
Here, the high frequency oscillation module includes an actuator, a piston, and a diaphragm, the diaphragm being disposed on the piston, the actuator driving the piston to reciprocate linearly, thereby generating positive and negative pressure waves in the gas. When the gas delivered by the turbo fan 11 flows to the high-frequency oscillation module 5, the high-frequency oscillation module 5 drives the diaphragm to reciprocate through the actuator, so that oscillation pressure waves are generated in the gas. Here, the amplitude of the HF oscillation module is at most 100mbar and the ventilation frequency is 3-20 Hz. The advantage of this arrangement is that the use of the turbo fan 11 in conjunction with the hf oscillation module 5 replaces the usual compressed air with air which is pressurized by the turbo fan and delivered to the patient side without the use of a compressed air source.
In general, there may be disturbances in the gas delivered by the turbo fan 11, and there may also be disturbances in the upstream gas path by the high frequency oscillation module 5. As shown in fig. 1, the high-frequency ventilator system further includes a proportional valve 2 located in the inspiratory circuit and between the high-frequency oscillation module 5 and the mixing chamber 14, wherein the gas in the mixing chamber 14 flows to the high-frequency oscillation module 5 through the proportional valve 2. It should be noted that, when the gas flowing out from the mixing chamber 14 flows to the high-frequency oscillation module 5, the gas passes through the proportional valve 2, and then the flow rate and the pressure flowing to the high-frequency oscillation module 5 are adjusted by the proportional valve 2, and in addition, by the arrangement of the proportional valve 2, on one hand, the disturbance of the gas delivered by the turbo fan 11 can be reduced, and on the other hand, the pressure and the flow rate of the gas delivered to the high-frequency oscillation module 5 can be adjusted.
In addition, since the turbo fan may generate a negative pressure to cause gas backflow, the high frequency ventilator system further includes a check valve 17 disposed between the mixing chamber 14 and the proportional valve 2 for preventing gas in the inhalation circuit from flowing back into the mixing chamber 14. Through the arrangement of the check valve, the interference of the high-frequency oscillation unit on the air path upstream of the proportional valve is also avoided.
Since the flow rate of the gas delivered by the turbo fan 11 is not controllable, the frequency at which the high-frequency oscillation module 5 operates is related to the pressure and flow rate of the gas flowing into the high-frequency oscillation module 5. As shown in fig. 1, the high-frequency ventilator system further comprises a first pressure-flow sensor 18, located in the inspiratory circuit between the mixing chamber 14 and the proportional valve 2, adapted to detect the pressure and flow of the gas flowing out of the mixing chamber 14. That is, when the gas flows out of the mixing chamber 14, the flow rate and pressure of the gas flowing out of the mixing chamber are monitored, and then the adjustment of the proportional valve 2 is guided, so that the pressure and flow rate of the gas flowing out of the proportional valve 2 meet the preliminary requirements of the high-frequency oscillation module 5, and the breathing experience of the patient is increased.
At this time, in order to ensure accuracy of the pressure and flow rate of the gas flowing into the hf oscillation module 5, the hf ventilator system further includes a second pressure and flow rate sensor 4, located in the inspiratory circuit and between the hf oscillation module 5 and the proportional valve 2, adapted to detect the pressure and flow rate of the gas flowing into the hf oscillation module 5. That is, before the gas flows into the high-frequency oscillation module 5, the flow rate and the pressure of the gas are monitored, the result is fed back to the controller, and the opening degree of the proportional valve 2 is further adjusted by the controller, so that the accuracy of the pressure and the flow rate of the gas flowing into the high-frequency oscillation module is ensured.
It should be noted that the high frequency ventilator system further comprises an oxygen concentration sensor 21, which is located in the inspiratory circuit and is adapted to monitor the oxygen concentration in the inspiratory circuit. That is, before the gas is delivered to the patient, the oxygen concentration in the inspiratory circuit is monitored and timely fed back to the controller, and the compressed oxygen source is timely adjusted so that the oxygen concentration delivered to the patient is closer to the optimal value.
Since the temperature of the turbo fan 11 increases gradually as the turbo fan 11 delivers the gas, the temperature of the gas flowing in through the turbo fan 11 increases, and the temperature of the gas flowing out of the mixing chamber 14 is measured even as high as 51 ℃ due to the operation of the turbo fan 11. In this case, a refrigerator is provided in the mixing chamber 14, adapted to cool the gas in the mixing chamber 14. It should be noted that the refrigerator may be a semiconductor refrigerator, and the refrigerator may also be a cooling fan.
In addition, the high frequency ventilator system further comprises a temperature sensor 9, located in the inspiratory circuit, between the patient side and the mixing chamber 14, adapted to monitor the temperature of the gas in the inspiratory circuit. Here, the gas temperature is monitored in real time and transmitted to the controller, and when the gas temperature in the suction circuit is higher than a set value, the operation power of the refrigerator is increased or the oxygen supply amount of the compressed oxygen source is increased.
Since the gas delivered by the turbo fan 11 is not controllable, in order to reduce the risk, the hf ventilator system further comprises a safety valve 3, the safety valve 3 being located in the inspiratory circuit. In an emergency, the air suction circuit is connected to the atmosphere, so that the air delivered by the turbo fan 11 is discharged directly into the air.
Furthermore, the high-frequency ventilator system comprises an expiratory circuit for the discharge of the gas exhaled by the patient, the outlet of which is provided with a breather valve 8. In order to further enhance the safety performance, the high frequency ventilator system further comprises a safety circuit which communicates the inspiration circuit with the expiration circuit, the safety circuit being provided with a first shut-off valve 10. The first stop valve 10 is opened when an abnormality (usually, an excessive gas flow rate or an excessive pressure) occurs in the inhaled gas, and at the same time, the breather valve 8 is also opened to discharge a part of the gas to the outside of the room, and at this time, the exhalation circuit is provided with a check valve 7 to prevent the gas from being exhaled from the exhalation circuit only, and to prevent the gas from being supplied to the patient from the exhalation circuit.
Here, the inlet of the safety circuit is located between the proportional valve 2 and the high-frequency oscillation module, that is, the communication between the safety circuit and the inhalation circuit is located upstream of the high-frequency oscillation module 5, the high-frequency ventilator system further includes a check valve 20 disposed in the inhalation circuit and located between the high-frequency oscillation module and the patient side, the check valve 20 is a one-way valve adapted to allow the gas to pass through to the patient side, and prevent the exhaled gas of the patient from flowing back from the check valve 20.
In addition, the high frequency ventilator system further comprises a third pressure flow sensor 6, commonly referred to as a patient (proximal) flow (pressure) sensor, disposed at the patient's end, adapted to monitor the pressure and flow of gases inhaled and exhaled by the patient, typically, the third pressure flow sensor 6 is adapted to monitor the mean airway pressure of the patient. Here, the third pressure-flow sensor 6 is arranged between the patient end and the intersection of the inspiratory circuit and the expiratory circuit.
It should be noted that, when the high-frequency ventilator system ventilates at a constant frequency, the high-frequency oscillation module is closed, the turbo fan is started, and the ventilation time and the valve in the gas path are controlled to achieve the purpose of supplying gas at fixed time and quantity; when high-frequency ventilation is carried out, a continuous basic airflow is provided through the turbo fan, so that the stability of the average airway pressure of a patient end is guaranteed, the high-frequency oscillation module is started, the amplitude and the frequency of the high-frequency oscillation module are set, and the high-frequency oscillation ventilation is realized through the cooperation of the high-frequency oscillation module.
In the above embodiments, only the pneumatic circuit of the high frequency ventilator system is explained.
Because the turbo fan 11 is used for driving gas, the change of the rotating speed of the turbo fan 11 may cause the change of the gas pressure at the patient end, and if the amplitude of the high-frequency oscillation module 5 is kept unchanged all the time, the phenomenon of higher oscillation pressure may occur, which causes the pressure at the patient end to be higher, and discomfort to the patient. The present embodiment provides a method for controlling a high-frequency oscillation module, where the high-frequency oscillation module 5 is disposed in an inspiratory circuit of a high-frequency ventilator, and the high-frequency ventilator uses a turbo fan 11 to deliver gas, and the method for controlling the high-frequency oscillation module includes:
s1: starting a high-frequency respirator, starting the turbofan 11, setting the oscillation frequency of the high-frequency oscillation module, and acquiring the rotation parameters of the turbofan 11 and the pressure of a patient end in real time;
s2: determining an amplitude variation interval of the amplitude of the high-frequency oscillation module 5 according to the rotation parameter of the turbo fan 11 and the pressure at the patient end;
s3: carrying out amplitude rising control on the high-frequency respirator in the amplitude change interval;
s4: when the pressure at the patient end reaches a set condition, the high-frequency respirator stops executing amplitude increasing control, and meanwhile, the amplitude of the high-frequency oscillation module 5, namely the calibration amplitude, is obtained;
s5: and controlling the high-frequency oscillation module 5 according to the calibration amplitude and the oscillation frequency.
In step S1, it should be noted that turning on the high-frequency ventilator only powers on the high-frequency ventilator, and at this time, the turbo fan is not directly turned on, and needs to be separately turned on additionally, so as to avoid unnecessary risks. In this embodiment, the oscillation frequency of the high-frequency oscillation module is preset, and it should be noted that the high-frequency oscillation module 5 includes an actuator, the actuator drives a piston to reciprocate by using electromagnetism, a high-frequency pulse-shaped excitation current is passed through an excitation coil of the actuator, and the frequency of the pulse-shaped excitation current corresponds to the oscillation frequency of the high-frequency oscillation module. Here, the rotation parameters of the turbofan 11 are collected in real time, and the rotation parameters include real-time obtaining of the rotation speed of the turbofan 11 and may also include the flow rate and pressure of the gas input by the turbofan 11, where the purpose of directly collecting the rotation speed of the turbofan 11 is that the turbofan 11 may drive a mixture of air and oxygen or may drive only air or oxygen, but the rotation speed of the turbofan 11 may be uniquely determined, where the rotation speed of the turbofan 11 is monitored, and the amplitude of the high-frequency oscillation module is re-determined in real time according to the rotation speed of the turbofan 11. Here, in high frequency ventilation, the patient side pressure refers to the patient's Mean Airway Pressure (MAP).
In step S2, it is necessary to establish a functional relationship among the rotation parameter of the turbo fan 11, the patient-side pressure P and the amplitude of the hf oscillation module 5, where Vr is the rotation speed of the turbo fan 11, P is the patient-side pressurepaThe amplitude of the high-frequency oscillation module is A, and the amplitude of the high-frequency oscillation module is:
Figure GDA0003186559030000091
wherein k1 and k2 are proportionality coefficients, which are related to the set value of the patient-side pressure according to the gear of the turbo fan 11, for example, when the patient-side pressure is set to 40mbar, the patient-side pressure fluctuates between 35 and 45mbar, and if the rotational speed of the turbo fan 11 is 500r/min, the amplitude of the high-frequency oscillation module is 20 mbar. Here, the amplitude variation interval of the amplitude of the high-frequency oscillation module is determined according to the interval variation range of the patient end pressure.
In step S3, in order to confirm the magnitude of the amplitude of each rise of the high-frequency ventilator, in this embodiment, performing amplitude rise control on the high-frequency ventilator in the amplitude variation interval includes: dividing the set amplitude into n amplitude steps according to the amplitude change interval; the amplitude of the hf oscillation module 5 is increased by at least one amplitude step at a time. For example, when the amplitude variation interval is [0, 20] mbar, the stroke of the piston of the high-frequency oscillation module 5 is [0, 10] mm, the amplitude variation interval can equally divide the set amplitude into 5 intervals, and the amplitude step of each interval is 4mbar, that is, the amplitude of the high-frequency oscillation module 5 is increased by at least 4mbar each time, and the stroke of the piston is increased by at least 2mm each time. It should be noted that the specific stroke of the piston is also related to the acting area of the piston, and the stroke of different pistons is different. It should be noted that when the amplitude of the hf ventilator is increased, the frequency of the hf ventilator is decreased accordingly in order to ensure the tidal volume of the patient.
Of course, the amplitude of the high-frequency oscillation module 5 may not be equal every time it increases, and in this embodiment, the magnitude of the set amplitude of the high-frequency oscillation module 5 every time it increases gradually decreases. The larger the amplitude is, the larger the amplitude of the pressure wave which can be generated by the high-frequency oscillation module is, and therefore, the greater the risk is, at this time, the amplitude of each rise of the amplitude of the high-frequency oscillation module 5 is gradually reduced, that is, when the amplitude is larger, the amplitude of each rise of the amplitude is smaller, so that the risk caused by the reduction of the amplitude is reduced, and the breathing experience of the patient is improved.
It should be noted that, when the amplitude of the high-frequency oscillation module 5 changes, it takes a certain time for the flow and pressure changes of the gas in the high-frequency ventilator system to respond, and the gas circuit of the high-frequency ventilator needs a certain time for the amplitude to be stable, in this case, the amplitude increase control includes:
s31: after the amplitude of the high-frequency oscillation module 5 rises for a set amplitude each time, the high-frequency oscillation module 5 runs at the current amplitude;
s32: after the high-frequency oscillation module 5 is operated at the current amplitude for a set time, the amplitude of the high-frequency oscillation module 5 continues to increase.
Here, the setting time is required to be such that the gas in the hf ventilator can be stabilized after each change of the frequency of the hf oscillation module 5 within a setting time, which is usually not equal to 5-20s, but may be greater or less than this, which is usually preset.
In S4, the setting conditions here may be: and when the maximum pressure of the pressure at the patient end is greater than or equal to the set pressure, stopping executing amplitude increasing control by the high-frequency respirator. Here, the set pressure may be a set patient-side pressure or a value smaller than the set patient-side pressure. The advantage that sets up like this lies in, adopts cascaded amplitude variation, can make the amplitude of high frequency respirator tend to stable fast, adopts the step-by-step to go forward, also can avoid patient end pressure surpasss the safety range.
In S5, the present embodiment, controlling the high-frequency oscillation module 5 according to the nominal amplitude and the oscillation frequency includes:
s51; confirming the operation amplitude of the high-frequency oscillation module 5 according to the calibration amplitude; here, the operating amplitude is a difference between the calibration amplitude and the set amplitude.
S52: establishing said running amplitude AfAnd the relation between the oscillation frequency f and the current I through the high-frequency oscillation module 5; here, the oscillation frequency f is the same as the pulse frequency of the current I passing through the high-frequency oscillation module 5, and the current I passing through the high-frequency oscillation module 5 is equal to the operation amplitude afIn a direct proportional relationship.
S53: and controlling the high-frequency oscillation module according to the current.
In the control method of the high-frequency oscillation module, amplitude increasing control is performed on the high-frequency oscillation module, when the rotating speed of the turbofan changes, amplitude is reconfirmed by acquiring the pressure at the patient end and the rotating speed of the turbofan when the pressure at the patient end changes, which is equivalent to realizing amplitude increasing control of a respirator, so that the high-frequency respirator always works in a safe pressure range, and the risk of air pressure increase caused by the change of the rotating speed of the turbofan is reduced.
The present embodiment provides a control device for a high-frequency oscillation module, wherein the high-frequency oscillation module 5 is disposed in an inspiratory loop of a high-frequency ventilator, the high-frequency ventilator uses a turbo fan 11 to deliver gas, and the control device for the high-frequency oscillation module comprises:
an obtaining unit 101, configured to obtain a rotation parameter of the turbo fan 11 and a patient end pressure in real time;
the calculation unit 103 is configured to determine an amplitude variation interval of the high-frequency oscillation module 5 according to a rotation parameter of the turbo fan 11 and a patient end pressure;
a control unit 102, configured to perform amplitude increasing control on the high-frequency ventilator within the amplitude variation interval, and further configured to stop performing amplitude increasing control on the high-frequency ventilator when the pressure at the patient end is greater than or equal to a set pressure;
the obtaining unit is further configured to obtain an amplitude of the high-frequency oscillation module 5, that is, a calibration amplitude, when the pressure at the patient end reaches a set pressure;
the control unit is further configured to control the high-frequency oscillation module 5 according to the calibration amplitude and the oscillation frequency.
The control device of the high-frequency oscillation module according to this embodiment has the same beneficial effects as the control method of the high-frequency oscillation module, and is not described herein again.
The present embodiment provides a high-frequency ventilator, which includes a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the control method of the high-frequency oscillation module according to any one of the above. The beneficial effects of the high-frequency ventilator described in this embodiment are the same as the control method of the high-frequency oscillation module, and are not described herein again.
The present embodiment provides a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the control method of the high-frequency oscillation module described in any one of the above. The beneficial effects of the computer readable storage medium of this embodiment are the same as the control method of the high frequency oscillation module, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention will be apparent to those skilled in the art from this description.

Claims (9)

1. A high-frequency ventilator comprising a computer-readable storage medium storing a computer program which, when read and executed by a processor, implements a method of controlling a high-frequency oscillation module (5) provided in an inspiratory circuit of the high-frequency ventilator, the high-frequency ventilator using a turbo fan (11) for gas delivery, the method comprising:
s1: starting a high-frequency respirator, starting the turbofan (11), setting the oscillation frequency of the high-frequency oscillation module, and acquiring the rotation parameters of the turbofan (11) and the pressure of the patient end in real time;
s2: determining an amplitude variation interval of the high-frequency oscillation module (5) according to the rotation parameter of the turbo fan (11) and the pressure of the patient end;
s3: carrying out amplitude rising control on the high-frequency respirator in the amplitude change interval;
s4: when the pressure at the patient end reaches a set condition, the high-frequency respirator stops executing amplitude increasing control, and meanwhile, the amplitude of the high-frequency oscillation module (5) at the moment, namely the calibration amplitude, is obtained;
s5: and controlling the high-frequency oscillation module (5) according to the calibration amplitude and the oscillation frequency.
2. The high frequency ventilator of claim 1, wherein the ramp control comprises:
after the amplitude of the high-frequency oscillation module (5) rises by a set amplitude each time, the high-frequency oscillation module (5) operates at the current amplitude;
and when the high-frequency oscillation module (5) runs for a set time at the current amplitude, the amplitude of the high-frequency oscillation module (5) continues to increase.
3. A high-frequency respirator according to claim 2, characterized in that the amplitude of the high-frequency oscillation module (5) decreases in value each time after a set amplitude has been increased.
4. The high-frequency ventilator according to claim 2, wherein the amplitude control of the high-frequency ventilator in the amplitude variation interval includes:
dividing the set amplitude into n amplitude steps according to the amplitude change interval;
the amplitude of the HF oscillation module (5) is increased by at least one amplitude step at a time.
5. The high-frequency ventilator according to claim 1, characterized in that the rotation parameter includes a real-time acquisition of the rotational speed of the turbo fan (11).
6. The high-frequency ventilator according to claim 1, wherein controlling the high-frequency oscillation module (5) according to the nominal amplitude and the oscillation frequency comprises:
confirming the operation amplitude of the high-frequency oscillation module (5) according to the calibration amplitude;
establishing a relationship between the running amplitude and the oscillation frequency and the current through the high-frequency oscillation module (5);
and controlling the high-frequency oscillation module according to the current.
7. The high frequency ventilator of claim 6 wherein the operating amplitude is the difference between the nominal amplitude and a set amplitude.
8. A control device of a high-frequency oscillation module (5) arranged in an inspiration circuit of a high-frequency ventilator, said ventilator using a turbo fan (11) for the delivery of gas, characterized in that it comprises:
the acquiring unit (101) is used for acquiring the rotation parameters of the turbo fan (11) and the pressure of the patient end in real time;
the calculation unit (103) is used for determining an amplitude change interval of the high-frequency oscillation module (5) according to the rotation parameter of the turbo fan (11) and the pressure at the patient end;
the control unit (102) is used for carrying out amplitude increasing control on the high-frequency respirator in the amplitude change interval and is also used for stopping executing the amplitude increasing control on the high-frequency respirator when the pressure at the patient end is greater than or equal to a set pressure;
the acquisition unit is also used for acquiring the amplitude of the high-frequency oscillation module (5), namely the calibration amplitude, when the pressure at the patient end reaches the set pressure;
the control unit is also used for controlling the high-frequency oscillation module (5) according to the calibration amplitude.
9. A computer-readable storage medium, storing a computer program which, when read and executed by a processor, implements a method of controlling a hf-oscillation module, the hf-oscillation module (5) being provided in an inspiratory circuit of a hf-ventilator that employs a turbo-fan (11) for delivery of a gas, the method comprising:
s1: starting a high-frequency respirator, starting the turbofan (11), setting the oscillation frequency of the high-frequency oscillation module, and acquiring the rotation parameters of the turbofan (11) and the pressure of the patient end in real time;
s2: determining an amplitude variation interval of the high-frequency oscillation module (5) according to the rotation parameter of the turbo fan (11) and the pressure of the patient end;
s3: carrying out amplitude rising control on the high-frequency respirator in the amplitude change interval;
s4: when the pressure at the patient end reaches a set condition, the high-frequency respirator stops executing amplitude increasing control, and meanwhile, the amplitude of the high-frequency oscillation module (5) at the moment, namely the calibration amplitude, is obtained;
s5: and controlling the high-frequency oscillation module (5) according to the calibration amplitude and the oscillation frequency.
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