CN106139338A - Lung ventilator - Google Patents

Lung ventilator Download PDF

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Publication number
CN106139338A
CN106139338A CN201510115288.1A CN201510115288A CN106139338A CN 106139338 A CN106139338 A CN 106139338A CN 201510115288 A CN201510115288 A CN 201510115288A CN 106139338 A CN106139338 A CN 106139338A
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China
Prior art keywords
patient
negative pressure
expiration
lung ventilator
valve
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Pending
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CN201510115288.1A
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Chinese (zh)
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孟海侠
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孟海侠
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Priority to CN201510115288.1A priority Critical patent/CN106139338A/en
Publication of CN106139338A publication Critical patent/CN106139338A/en
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Abstract

The invention provides a kind of lung ventilator and ventilating mode thereof.This lung ventilator includes pressure maintaining valve, inlet valve, flow sensor, suction end pressure sensor 6, expiration safety valve 8, negative pressure device 17, switching valve 16 of exhaling, outlet valve 15 and Ventilator Control System.This lung ventilator of inspiratory cycle is with user setup parameter, and flow sensor, suction end pressure sensor the 6th, patient signal that expiration end pressure sensor 19 monitors is foundation, and control inlet valve is supplied gas to patient;The vacuum suction that this lung ventilator of exhalation cycle exports with negative pressure device 17, the resistance that when overcoming patient expiration, air flue and breathing pipeline produce.Further, this lung ventilator can also suck 1.1-2 times of Normal tidal volume to patient, and during patient expiration, this lung ventilator starts negative pressure device 17, patient expiration is made to reach the exhaust flow rate of patient's physiology cough process, simulated patient real physiology cough process flow velocity moment.By simulated patient physiology cough process, reach to discharge the purpose being accumulated in patient airway sputum.

Description

Lung ventilator
Technical field
The present invention relates to medical instruments field, more particularly to a kind of lung ventilator and ventilating mode thereof.
Background technology
Breathing Suppotion is one of means saving urgency, critical patient life most critical, thus, lung ventilator is in clinical economics, it has also become indispensable apparatus, in first aid, anesthesia, in ICU and respiratory therapy field, just more and more extensively applies.Lung ventilator is that one can replace, control or the normal physiological breathing changing people, increases pulmonary ventilation volume, improves respiratory function, mitigation work of breathing consumption, save the device of heart reservation ability.The principle of lung ventilator air-breathing on the market is, through respiratory tract direct weighting, directly to apply normal pressure with gas at present, exceedes alveolar pressure and produces pressure differential, and gas enters lung → air-breathing;And exhaling is after removing external Mechanical Driven pressure, thorax and lung recoil is relied on to produce alveolar and gas port passivity positive pressure difference and exhale.Its shortcoming is that exhalation process is uncontrolled, depends on the airway resistance of patient, the elasticity of thorax and lung, forces gas to be exhaled with the pressure differential of ambient atmosphere due to alveolar.It has ignored the airway resistance of patient own, and the difference of chest lung elastance and breathing circuit, lung ventilator outlet valve are due to design and the impact on patient expiration's resistance for the maintenance reasons resistance situation of change.The present invention solves this problem, the passive exhalation process of existing lung ventilator, be designed as the active expiration process that can be controlled by patient and lung ventilator completely.
The shortcoming of prior art is that exhalation process is uncontrolled, the resistance of elasticity, breathing pipeline and the outlet valve of whether unimpeded airway resistance, thorax and the lung depending on patient of exhaling.As run into airway resistance compared with patient big, that chest lung elastance is not so good, or lung ventilator outlet valve itself is due to design or improper use, there is bigger expiratory resistance, use lung ventilator can cause patient expiration's overlong time in this case, or it is not smooth to exhale, and then affect respirator treatment effect.Patient as more in sputum, in addition it is also necessary to frequently use sputum aspirator suction sputum liquid, affect the result for the treatment of of lung ventilator.The present invention can increase vacuum suction patient expiration, overcome patient airway and breathing pipeline resistance, shorten the expiratory duration of patient, and also can be according to the air flue sputum accumulation of patient, at inspiratory cycle, to patient, repeatedly or single is passed through big tidal volume (typically 1.1-2 times of Normal tidal volume setting value), patient expiration is made to reach the exhaust flow rate of patient's physiology cough process, simulated patient real physiology cough process flow velocity moment in exhalation cycle.By simulated patient physiology cough process, discharge the sputum of air flue accumulation, reach to use no or little the purpose that sputum aspirator is patient's suction sputum.
Content of the invention
For existing positive airway pressure lung ventilator, developing a kind of lung ventilator that can help patient's active expiration, this technical scheme can mitigate patient expiration's resistance, shorten expiratory duration, simulated patient physiology cough process, helps patient to excrete air flue sputum, reduces artificial use sputum aspirator suction sputum number of times.
A kind of lung ventilator, its operation principle as shown in Figure 1: the main gas circuit control parts of this lung ventilator comprise, oxygen source filter 1, air source of the gas filter 13, oxygen source pressure sensor 2, air bleed pressure sensor 12, pressure maintaining valve 3, pressure maintaining valve 11, inlet valve 4, inlet valve 10, flow sensor 5, flow sensor 9, air-breathing safety valve 7 and suction end pressure sensor 6.Aforementioned gas path component is similar with prior art lung ventilator, is equivalent to the air-breathing gas path component of existing lung ventilator.Expiration safety valve 8, can set negative pressure value, after the negative pressure value in breathing pipeline exceedes setting negative pressure value, this expiration safety valve 8 can be driven to open by the air pressure of pipeline e, make breathing pipeline communicate with ambient atmosphere environment.The gas that switching valve 16 of exhaling controls patient's exhalation is directly to be discharged to external environment condition via outlet valve 15, or be discharged to external environment condition after negative pressure device 17 again.Aforesaid switching valve 16 of exhaling, is two-position three-way valve, and the air pressure being exported by aforementioned negative pressure device 17 is conducted to aforesaid switching valve 16 of exhaling by pipeline d, controls the switching of aforesaid switching valve 16 of exhaling.When aforementioned negative pressure device 17 exports negative pressure more than a certain setting value, switching a and o turns on;When aforementioned negative pressure device 17 exports negative pressure less than a certain setting value, switching b and o turns on.I.e. aforementioned negative pressure device 17 starts moment while exporting negative pressure more than a certain setting value (be equivalent to this negative pressure device 17), and switching valve 16 of exhaling exports a and o and turns on;Aforementioned negative pressure device 17 standby moment is equivalent to this negative pressure device 17 when exporting negative pressure less than a certain setting value), switching valve 16 of exhaling exports b and o and turns on.Outlet valve 15 is integrated with the flow low side acquisition port 21 of the pressure acquisition mouth 22 of breath pressure sensor 19, expiratory gas flow measuring probe o, and expiratory flow sensor 20, the high-end acquisition port of flow 22.Difference size between breath pressure sensor 19 and inspiratory pressure sensor 6 may be used for judging that whether expiration safety valve 8 is normally-open.
Can be seen that from operation principle Fig. 1, when aforementioned negative pressure device 17 is when the whole course of work of lung ventilator is all standby, switching valve 16 of exhaling exports b and o and turns on, this technical scheme is as the prior art lung ventilator course of work, i.e. oxygen and air source of the gas are through filtering and after bleed pressure Sensor monitoring, being directly entered pressure maintaining valve voltage stabilizing, then complete sky oxygen two-way gas mixture at given volumeratio by inlet valve, and by the breathing pattern setting, give patient ventilation.At the end of air-breathing, inlet valve cuts out, and outlet valve 15 is opened, and by the pressure differential between alveolar pressure and atmospheric pressure, outwardly environment is exhaled.The function one newly increasing: if after patient breaths terminates, need to start active expiration function to help to overcome airway resistance, then outlet valve the 15th, negative pressure device 17 and switching valve 16 of exhaling are opened simultaneously, alveolar gas breathes out rapidly, until after reaching the PEEP value setting, the 15th, outlet valve is exhaled and is switched valve the 16th, expiration safety valve 8 and negative pressure device 17 and enter holding state;The function two newly increasing: if needing the exhalation process of patient to be modeled to the physiology cough process of patient, discharge air flue sputum, not when air-breathing, aforementioned lung ventilator is passed through 1.1-2 times of Normal tidal volume to patient, during expiration, start negative pressure device 17, treat that patient expiration reaches the exhaust flow rate of patient's physiology cough process flow velocity moment, simulated patient physiology cough process, reaches to discharge the purpose being accumulated in patient airway sputum.As seen from the above analysis, the beneficial effect of this technical scheme at least 2 point: the 1st, help to overcome patient airway and breathing machine pipeline resistance, make the expiration that patient is more happy;2nd, simulated patient physiology cough process helps patient to discharge sputum, reduces the number of times using sputum aspirator suction sputum.
Brief description
Fig. 1 is the fundamental diagram of the present invention;
In accompanying drawing, each symbol name is said the name of sth. bright:
1,13 filters 2,12 pressure sensors 3,11 pressure maintaining valves 4,10 inlet valve 5, the 9 flow sensor 6 inspiratory pressure sensor 7 air-breathing safety valves 8 safety valve 14 patient end 15 outlet valve 16 switching valve 17 negative pressure device 18 high-end acquisition port/pressure acquisition mouth 23 of exhaust outlet 19 breath pressure sensor 20 expiratory flow sensor 21 flow low side acquisition port 22 flow of exhaling of exhaling of exhaling is exhaled module 24 air-breathing module
Detailed description of the invention
Illustrate below with reference to accompanying drawings and in conjunction with specific embodiments to the detailed description of the invention of the present invention.
A kind of lung ventilator, it basic composition is air-breathing module 24, expiration module 23 and Ventilator Control System.Air-breathing module uses the mode of conventional ventilator, i.e. oxygen and air source of the gas are through filtering and after bleed pressure Sensor monitoring, being directly entered pressure maintaining valve voltage stabilizing, then complete sky oxygen two-way gas mixture at given volumeratio by inlet valve, and by the breathing pattern setting, to patient's supply.Except for the difference that an expiration safety valve 8 is added at air entry, if outlet valve negative pressure device 17 exports negative pressure exceedes setting value, this expiration safety valve 8 can automatically turn on, make breathing pipeline communicate with atmospheric environment, module of exhaling mainly by outlet valve the 15th, negative pressure device the 17th, the switching module such as valve 16 of exhaling form, this Ventilator Control System is in addition to possessing the effect of prior art Ventilator Control System, also add help patient and overcome tracheae and breathing circuit resistance function, and simulated patient physiology cough process, help patient to get rid of sputum function.The course of work of this two functions is presented herein below.
1st, patient is helped to overcome air flue and breathing circuit resistance
The breathing pattern periodic duty that lung ventilator is set by medical personnel, oxygen and air source of the gas are through filtering and after bleed pressure Sensor monitoring, being directly entered pressure maintaining valve voltage stabilizing, then complete sky oxygen two-way gas mixture at given volumeratio by inlet valve, and by the breathing pattern setting, to patient's supply.At the end of inspiratory cycle, inlet valve cuts out, and moment opened by outlet valve 15, negative pressure device 17 starts by setting negative pressure, the switching valve outlet port a gas o that exhales turns on, and the IA gas of patient, under the attraction of negative pressure device, is quickly discharged by patient airway, breathing pipeline and lung ventilator exhaust outlet.Expiration terminates, and negative pressure device 17 enters holding state, and switching valve outlet port b and the o that exhales turns on.
2nd, simulated patient physiology cough, helps patient to discharge sputum
The cough simulated respiration cycling that lung ventilator is set by medical personnel, or be stepped up with certain rule when Ventilator Control System monitors patient airway pressure mean values variation tendency, when reaching a certain setting value, lung ventilator starts cough physiology course simulation control automatically, i.e. lung ventilator is ventilated to patient breaths by 1.1-2 times of patient's Normal tidal volume mean value.At the end of inspiratory cycle, inlet valve cuts out, moment opened by outlet valve 15, negative pressure device 17 starts by setting negative pressure, switching valve outlet port a and the o that exhales turns on, the IA gas of patient is under the attraction of negative pressure device, and exhalation flow rate moment reaches the exhaust flow rate of patient's physiology cough process, excretes quickly through patient airway, breathing pipeline and lung ventilator exhaust outlet.The number of times of cough physiology course simulation cycle is according to the set point number of medical personnel, or the expectoration liquid effect that lung ventilator airway pressure Data Trend Monitor arrives determines, but most number of times is less than the continuous analog cough maximum setting.
For ensureing that patient uses being perfectly safe of this lung ventilator, the design and this Ventilator Control System control mode of gas circuit principle take reliable safety measure.Specifically include 1) in order to avoid excessive negative pressure patient harm; machinery negative-pressure protection device is devised exhaling on switching valve 16; i.e. when negative pressure value exceedes setting value; outlet can be turned to b end to turn on by the conducting of a end by switching valve 16 of exhaling automatically; reach the purpose allowing negative pressure device 17 lose efficacy: 2) expiration safeguard protection; i.e. expiration safety valve 8 can set negative pressure value; when the negative pressure value in breathing pipeline exceedes setting negative pressure value; expiration safety valve 8 can automatically turn on, and breathing pipeline communicates with ambient atmosphere environment.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All any modification, equivalent substitution and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.

Claims (4)

1. a lung ventilator, it is characterised in that this lung ventilator is when patient expiration, by control negative pressure device 17 and switching valve of exhaling 16, patient can be helped to overcome airway resistance, breathing pipeline and outlet valve resistance, shorten the expiratory duration of patient;Further, In patient breaths's cycle, this lung ventilator can suck 1.1-2 times of Normal tidal volume to patient, and during patient expiration, this lung ventilator opens Dynamic negative pressure device 17, makes patient expiration reach the exhaust flow rate of patient's physiology cough process flow velocity moment, and simulated patient is given birth to really Reason cough process, by simulated patient physiology cough process, reaches to discharge the purpose being accumulated in patient airway sputum, negative for ensureing After pressure device 17 starts, patient is not hindered by negative pressure, devises expiration safety valve 8 at this lung ventilator inner air path.
2. negative pressure device 17 according to claim 1, is made up of miniature turbine or other devices that can produce negative pressure, and should The gas pressure value of negative pressure device 17 output and flow value can be controlled by aforementioned Ventilator Control System.
3. switching valve 16 of exhaling according to claim 1, is two-position three-way valve, the negative pressure control being exported by aforementioned negative pressure device 17 System, when aforementioned negative pressure device 17 exports negative pressure more than a certain setting value, b and o turns on;Aforementioned negative pressure device 17 exports negative pressure During less than a certain setting value, b and o turns on.
4. expiration safety valve 8 according to claim 1, can set negative pressure value, when the negative pressure value in breathing pipeline exceedes setting During negative pressure value, this expiration safety valve 8 can automatically turn on, and makes breathing pipeline communicate with ambient atmosphere environment.
CN201510115288.1A 2015-03-16 2015-03-16 Lung ventilator Pending CN106139338A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510115288.1A CN106139338A (en) 2015-03-16 2015-03-16 Lung ventilator

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Application Number Priority Date Filing Date Title
CN201510115288.1A CN106139338A (en) 2015-03-16 2015-03-16 Lung ventilator

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CN106139338A true CN106139338A (en) 2016-11-23

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108273165A (en) * 2017-12-27 2018-07-13 北京雅果科技有限公司 A kind of breathing apparatus
CN108543182A (en) * 2018-05-02 2018-09-18 北京雅果科技有限公司 Noninvasive ventilator auxiliary Row of phlegm method and noninvasive ventilator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007117273A (en) * 2005-10-26 2007-05-17 Tokunaga Soki Kenkyusho:Kk Intra-tracheal sputum aspirating apparatus
JP2008073060A (en) * 2006-08-23 2008-04-03 Yuzo Yamaguchi Phlegm aspiration tube driving device and phlegm aspirator
CN202961423U (en) * 2012-12-29 2013-06-05 王洪泉 Expectoration machine
CN103384541A (en) * 2010-12-21 2013-11-06 皇家飞利浦电子股份有限公司 Ventilator with integrated blower to provide negative or positive pressure in a ventilator system
CN103391795A (en) * 2010-12-21 2013-11-13 皇家飞利浦电子股份有限公司 Active valve for ventilators

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007117273A (en) * 2005-10-26 2007-05-17 Tokunaga Soki Kenkyusho:Kk Intra-tracheal sputum aspirating apparatus
JP2008073060A (en) * 2006-08-23 2008-04-03 Yuzo Yamaguchi Phlegm aspiration tube driving device and phlegm aspirator
CN103384541A (en) * 2010-12-21 2013-11-06 皇家飞利浦电子股份有限公司 Ventilator with integrated blower to provide negative or positive pressure in a ventilator system
CN103391795A (en) * 2010-12-21 2013-11-13 皇家飞利浦电子股份有限公司 Active valve for ventilators
CN202961423U (en) * 2012-12-29 2013-06-05 王洪泉 Expectoration machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108273165A (en) * 2017-12-27 2018-07-13 北京雅果科技有限公司 A kind of breathing apparatus
CN108273165B (en) * 2017-12-27 2020-06-09 北京雅果科技有限公司 Breathing equipment
CN108543182A (en) * 2018-05-02 2018-09-18 北京雅果科技有限公司 Noninvasive ventilator auxiliary Row of phlegm method and noninvasive ventilator
CN111888596A (en) * 2018-05-02 2020-11-06 北京雅果科技有限公司 Noninvasive ventilator
CN111888596B (en) * 2018-05-02 2022-04-05 北京雅果科技有限公司 Noninvasive ventilator

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