CN102274565B - A kind of pressure compensation device and pressure compensating method being connected to respiratory system - Google Patents

A kind of pressure compensation device and pressure compensating method being connected to respiratory system Download PDF

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Publication number
CN102274565B
CN102274565B CN201110126010.6A CN201110126010A CN102274565B CN 102274565 B CN102274565 B CN 102274565B CN 201110126010 A CN201110126010 A CN 201110126010A CN 102274565 B CN102274565 B CN 102274565B
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CN
China
Prior art keywords
pressure
compensation device
pressure compensation
respiratory system
flexible pipe
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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.)
Expired - Fee Related
Application number
CN201110126010.6A
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Chinese (zh)
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CN102274565A (en
Inventor
戈兰·西维斯
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Shenzhen Mindray Bio Medical Electronics Co Ltd
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Shenzhen Mindray Bio Medical Electronics Co Ltd
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Publication of CN102274565A publication Critical patent/CN102274565A/en
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Expired - Fee Related legal-status Critical Current
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/20Valves specially adapted to medical respiratory devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES 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
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M2016/0027Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter

Abstract

The present invention is applicable to field of medical device, provides a kind of pressure compensation device and the pressure compensating method that are connected to respiratory system, and described pressure compensation device is that flow that is two-way, broadband produces equipment, the desired pressure of respiratory system is distributed for maintaining.In embodiments of the present invention, equipment is produced by increasing the flow that is two-way, broadband being connected to respiratory system, for maintaining, the desired pressure of respiratory system is distributed, achieve a kind of pressure compensation device being connected to respiratory system, desired pressure distribution can be produced at patient end, such as remove and change by the pressure of respiratory system pipeline the pressure oscillation produced, do not feel well to avoid patient.

Description

A kind of pressure compensation device and pressure compensating method being connected to respiratory system
Technical field
The invention belongs to field of medical device, relate to one and be connected in respiratory system to compensate transient pressure and flow process or control method and equipment.
Background technology
Fig. 1 shows the structure of a kind of the most frequently used respiratory system configured in medical breathing machine.First respirator 100 alternately transports a certain amount of gas to patient pulmonary 17, then discharges the gas of institute's upwards of movement.
Gas is controlled by the valve 12 and 13 being connected to flexible pipe 14 and 15, and gas converges in Y shaped piece 16 after flexible pipe 14 and 15, then enters in patient body through flexible pipe or face shield again.Because the valve with control system and electric power system is relatively huge, therefore they are often arranged on a room, form respirator.
Respirator is often positioned over distance patient several meters place far away.Therefore, the flexible pipe of respirator generally long more than a meter.This is not a unsurmountable problem, article one, flexible pipe is full of suction gas and another flexible pipe is full of breath, the live gas of supply patient only can not cause any mistake on capacity for the gas replaced in current flexible pipe, because this pressure change caused can't cause capacity to change.
Can to the pressure change caused in flexible pipe when flow changes.The compressibility concentrating on the weight bound gas of the gas in flexible pipe can cause the harmonic oscillation of hose system.These vibrations may cause the sense of discomfort of patient.
Above-mentioned pressure change also can make Stress control breathing pattern go wrong.Because Stress control realizes usually through so-called technology of closed loop.In order to make closed loop control really, exactly perform, this loop will be short.This can be arranged pressure transducer and realize by the place in the loop near valve, this valve is for controlling controlled pressed gas.Unfortunately, the pressure distribution at Y shaped piece place is different from the pressure distribution at pressure transducer place.On the contrary, if arrange pressure transducer at Y shaped piece place, pressure regulation circuit will become larger, and can cause damage to Stress control.But cause pressure distribution undesirable Another reason in Y shaped piece place may be that source of the gas controls too slow, common reason be exactly that source of the gas place has changeable flow turbine or inlet valve too slow.
Summary of the invention
Object of the present invention is intended to solve prior art Problems existing, provides a kind of pressure compensation device, can avoid, eliminates or reduce the change of the above-mentioned pressure near patient place.
The problems referred to above can adopt an active component to solve, and produce air-flow to compensate unexpected pressure by this active component.Can not obtaining from remote inlet valve of the flow distribution that this equipment produces.Such as, this method can adopt high frequency generator (HighFrequencyOscillator, HFO) or HFO (HighFrequencyVentilation, HFV) to realize.
The embodiment of the present invention is achieved in that a kind of pressure compensation device being connected to respiratory system, and described pressure compensation device is that flow that is two-way, broadband produces equipment, the desired pressure of respiratory system is distributed for maintaining.
It is a speaker that flow produces equipment, but adopts particular design to be also desirable for adapting to application.
For ventional loudspeakers, a favourable selection adopts the piezoelectric actuator being connected to mechanical amplifier to replace coil, and this selection can significantly improve the bandwidth of equipment.
In order to can suitably control appliance flow, in the local detected pressures near patient.It is expect in the pressure control loop of pressure distribution that pressure signal is included in another pressure-control valve, the output signal control appliance driver of this pressure control loop.
In addition, this equipment can also be adapted to by the standard separate unit other as a patient.This is conducive to the vibration of actively offsetting by preset standard setting.
As a first aspect of the present invention, pressure compensation device is for the connection in respiratory system and Stress control.This pressure compensation device comprises at least one driving element, at least one has container and at least one pressure transducer of exit passageway.According to the pressure that pressure transducer detects, compress under the motion of driver element or unclamp container.The exit passageway of container connects to be breathed, and pressure compensation device compensates the unexpected pressure change in respiratory system.
Due to superior design of the present invention, pressure compensation device can be connected to flow and produce equipment, such as respiratory system, serves as active member that is two-way, broadband.Desired pressure distribution can be produced by the control system with pressure control loop, and this pressure control loop is connected to another pressure control loop conversely, adopts a suitable mode can record the pressure located near user.
Preferably, container can be designed as one and has the superjacent bellows of dish, and container is promoted by driver.
The present invention can use as the separate unit of patient end, also may be used for the vibration of initiatively offsetting preassigned.
Preferably, the driving element in pressure compensation device can be pressure driver.
Compared with coil etc., the design considerably improves the bandwidth of concrete equipment, and this design may be used in other embodiments equally.Use an advantage of pressure driver can be connected in series to mechanical motion amplifier exactly, push away to amplify pressure driver, amplitude that roping is dynamic.
In addition, the present invention also provides a kind of pressure compensating method, comprises the steps:
A pressure compensation device being connected to respiratory system is provided;
By the motion of the driver at least one pressure transducer controlled pressure control loop;
The desired pressure distribution of the gases flow respiratory system of the pneumatic transient pressure processor of the turnover produced by actuation movement.。
In embodiments of the present invention, equipment is produced by increasing the flow that is two-way, broadband being connected to respiratory system, for maintaining, the desired pressure of respiratory system is distributed, achieve a kind of pressure compensation device being connected to respiratory system, desired pressure distribution can be produced at patient end, such as remove and change by the pressure of respiratory system pipeline the pressure oscillation produced, do not feel well to avoid patient.
Accompanying drawing explanation
Fig. 1 is the structural representation of the conventional respiratory system that prior art provides;
Fig. 2 is the structural scheme of mechanism adding the respiratory system of pressure compensation device that the embodiment of the present invention provides;
Fig. 3 is the structural representation of the pressure compensation device that the embodiment of the present invention provides.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The problems referred to above that prior art exists can adopt an active component to solve, and produce air-flow to compensate unexpected pressure by this active component.Can not obtaining from remote inlet valve of the flow distribution that this equipment produces.Such as, this method can adopt high frequency generator (HighFrequencyOscillator, HFO) or HFO (HighFrequencyVentilation, HFV) to realize.
Embodiments of the invention connect a pressure compensation device at the gas passage place near patient, and this pressure compensation device can produce equipment for flow.Like this, flow produces equipment and is required to be two-way, broadband, the desired pressure of respiratory system is distributed for maintaining.But, may zero-mean be there is, because inlet valve can produce Non-zero Mean.In principle, flow produces equipment can be a speaker or coil.But other particular design adopted for adapting to application are also desirable.Further, pressure compensation device can also be configured to the pressure compensating respiratory system according to preset standard.
In addition, also have a kind of favourable selection to be adopt the piezoelectric actuator being connected to mechanical amplifier to replace coil, adopt the bandwidth that can significantly improve equipment in this way.
Fig. 2 shows the structural representation adding the respiratory system of pressure compensation device 20 that the embodiment of the present invention provides.Pressure compensation device 20 can be connected to respiratory system in the place near patient by Y shaped piece etc.This pressure compensation device 20, for the connection in respiratory system and Stress control, comprises at least one driving element, at least one has container and at least one pressure transducer of exit passageway.The pressure that driver element detects according to pressure transducer, compresses or unclamps container; The outlet of container is by expanding channels respiratory system.Pressure compensation device compensates the unexpected pressure change in respiratory system, the desired pressure of respiratory system is distributed for maintaining.
In order to can suitably control appliance flow, in the local detected pressures near patient, namely pressure transducer be arranged at the place near patient.It is expect in the pressure control loop of pressure distribution that pressure signal is included in another pressure-control valve, the output signal control appliance driver of this pressure control loop.
Preferably, pressure compensation device can be connected to flow and produce equipment, such as respiratory system, serves as active member that is two-way, broadband.Desired pressure distribution can be produced by the control system with pressure control loop, and this pressure control loop is connected to another pressure control loop conversely, adopts a suitable mode can record the pressure located near user.
Preferably, the driving element in pressure compensation device can be pressure driver.This pressure driver can be piezoelectric actuator, and pressure compensation device also comprises the mechanical amplifier that is connected in series to this piezoelectric actuator.
Preferably, container can be designed as and comprises bellows, a dish be pressed on these bellows, and an outlet.Container compresses in the promotion of driver or unclamps.
Particularly, Fig. 3 shows the structural representation of the pressure compensation device 20 that the embodiment of the present invention provides.This pressure compensation device 20 comprises a piezoelectric actuator 30, mechanical amplifier 31, removable dish, 32, bellows 33 and an outlet 34.Four-headed arrow 36 in Fig. 3 shows the direction of bidirectional control flow.
As shown in Figure 3, in embodiments of the present invention, the mechanical amplifier 31 that moves through that piezoelectric actuator 30 produces amplifies, and then pushing disk 32 moves.Bellows 33 are then compressed, and create the moment flow 36 flowing through outlet 34.Driver 30 and removable dish 32 can be spring (not shown), therefore can produce way moving and flowing.Pressure transducer 35 feeds back to pressure control loop for equipment provides.
Compared with coil etc., the design considerably improves the bandwidth of concrete equipment, and this design may be used in other embodiments equally.In addition, use an advantage of pressure driver can be connected in series to mechanical motion amplifier 31 exactly, push away to amplify pressure driver, amplitude that roping is dynamic.
In addition, this equipment can also be adapted to by the standard separate unit other as a patient.This is conducive to the vibration of actively offsetting by preset standard setting.
In addition, the embodiment of the present invention also provides one to compensate or controlled pressure compensation method for a pair transient pressure and flow in respiratory system.The method comprises the steps:
A pressure compensation device being connected to respiratory system is provided;
By the motion of the driver at least one pressure transducer controlled pressure control loop;
To be moved by driver and the air-flow of the pneumatic transient pressure processor of turnover produced distributes with the desired pressure of Hold up voltage system.
In embodiments of the present invention, the specific implementation of pressure compensation device, with above-mentioned pressure compensation device, repeats no more.
The advantage of the method that the embodiment of the present invention provides is with above-mentioned equipment, and namely, the method can produce desired pressure distribution at patient end, and such as remove and change by the pressure of respiratory system pipeline the pressure oscillation produced, this pressure oscillation also can cause harmonic oscillation.These may make patient not feel well, and Stress control breath method also may be caused to go wrong.
In embodiments of the present invention, equipment is produced by increasing the flow that is two-way, broadband being connected to respiratory system, for maintaining, the desired pressure of respiratory system is distributed, achieve a kind of pressure compensation device being connected to respiratory system, desired pressure distribution can be produced at patient end, such as remove and change by the pressure of respiratory system pipeline the pressure oscillation produced, do not feel well to avoid patient.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. one kind is connected to the pressure compensation device of respiratory system, respiratory system comprises respirator, respirator comprises the first flexible pipe for transporting suction gas and the second flexible pipe for transporting breath, first flexible pipe is connected the first valve and the second valve respectively with second flexible pipe one end, the other end connects the two ends of Y shaped piece respectively, 3rd end of Y shaped piece connects patient by flexible pipe or face shield, it is characterized in that, described pressure compensation device is that flow that is two-way, broadband produces equipment, and the desired pressure for Hold up voltage system distributes; Described pressure compensation device comprises at least one driving element, at least one has container and at least one pressure transducer of exit passageway; The pressure that described driving element detects according to pressure transducer, compresses or unclamps described container; The exit passageway of described container is connected to respiratory system by Y shaped piece, to make pressure compensation device near the gas passage place of patient.
2. pressure compensation device as claimed in claim 1, it is characterized in that, described pressure compensation device is speaker or coil.
3. pressure compensation device as claimed in claim 1, is characterized in that, described pressure compensation device is configured to the pressure compensating respiratory system according to preset standard.
4. pressure compensation device as claimed in claim 1, is characterized in that, described pressure transducer is arranged at the place near patient.
5. pressure compensation device as claimed in claim 1, it is characterized in that, described driving element is pressure driver.
6. pressure compensation device as claimed in claim 5, it is characterized in that, described pressure driver is piezoelectric actuator, and described pressure compensation device also comprises the mechanical amplifier that is connected in series to described piezoelectric actuator.
7. pressure compensation device as claimed in claim 1, it is characterized in that, described container comprises:
Bellows;
Be pressed in the dish on described bellows; And an outlet.
CN201110126010.6A 2010-05-17 2011-05-16 A kind of pressure compensation device and pressure compensating method being connected to respiratory system Expired - Fee Related CN102274565B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1050489-2 2010-05-17
SE1050489A SE535827C2 (en) 2010-05-17 2010-05-17 Pneumatic transient controller for connection and control of pressure in a respiratory system, as well as a method for controlling the respiratory system

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CN102274565B true CN102274565B (en) 2015-11-25

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CN103684046B (en) * 2013-12-13 2016-03-02 南京航空航天大学 A kind of human body respiration energy collecting device
CN108619597B (en) * 2017-03-17 2021-03-05 深圳市大雅医疗技术有限公司 Pressure compensation method for flow channel of breathing machine
WO2021179215A1 (en) * 2020-03-11 2021-09-16 深圳迈瑞生物医疗电子股份有限公司 Respiratory ventilation system and method
CN113082411B (en) * 2021-03-25 2022-01-04 湖南万脉医疗科技有限公司 Non-lag oxygen supply respirator system
CN112915336B (en) * 2021-03-25 2021-11-02 湖南万脉医疗科技有限公司 Compensation type breathing machine oxygen supply method and breathing machine

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US5076267A (en) * 1987-11-03 1991-12-31 Dragerwerk Aktiengesellschaft Closed circuit breathing device with pressure sensing means
US6658118B1 (en) * 1998-06-05 2003-12-02 Dana Corporation Suppression of fluid-borne noise

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US7717112B2 (en) * 2003-06-04 2010-05-18 Jianguo Sun Positive airway pressure therapy management module
US20070267940A1 (en) * 2006-05-15 2007-11-22 Par Technologies, Llc. Compressor and compression using motion amplification
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US5076267A (en) * 1987-11-03 1991-12-31 Dragerwerk Aktiengesellschaft Closed circuit breathing device with pressure sensing means
US6658118B1 (en) * 1998-06-05 2003-12-02 Dana Corporation Suppression of fluid-borne noise

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SE535827C2 (en) 2013-01-02
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