CN106492321B - A kind of ventilator - Google Patents

A kind of ventilator Download PDF

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Publication number
CN106492321B
CN106492321B CN201611039643.2A CN201611039643A CN106492321B CN 106492321 B CN106492321 B CN 106492321B CN 201611039643 A CN201611039643 A CN 201611039643A CN 106492321 B CN106492321 B CN 106492321B
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Prior art keywords
ventilator
valve
patient
pipeline
expectoration
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CN201611039643.2A
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CN106492321A (en
Inventor
张卫明
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Influence Of New Technology Development Co Ltd (beijing)
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Influence Of New Technology Development Co Ltd (beijing)
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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
    • 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
    • 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
    • A61M16/0009Accessories therefor, e.g. sensors, vibrators, negative pressure with sub-atmospheric pressure, e.g. during expiration
    • 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
    • A61M16/08Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816Joints or connectors
    • A61M16/0833T- or Y-type connectors, e.g. Y-piece
    • 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
    • A61M16/0057Pumps therefor
    • A61M16/0066Blowers or centrifugal pumps
    • 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
    • A61M16/0057Pumps therefor
    • A61M16/0075Bellows-type
    • 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
    • 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
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/33Controlling, regulating or measuring
    • 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
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/50General characteristics of the apparatus with microprocessors or computers

Abstract

The present invention provides a kind of ventilator, comprising: suction line which is provided with and provide positive pressure source, the surge tank, 2/2-way saccule valve of positive pressure for patient, and the 2/2-way saccule valve carries out on-off switching control by an air pump and first two-position three-way valve;Expiration pipeline, which is provided with outlet valve, and the outlet valve is controlled it by second two-position three-way valve by receiving the compressed gas of the pre-set constant pressure from surge tank;Expectoration pipeline which is provided with the fast gate valve for providing the negative pressure source of negative pressure for patient and being serially connected between negative pressure source and patient.Further include: central processing unit carries out Collaborative Control to ventilator each section according to the data of the sensor detection in ventilator.The ventilator makes expectoration machine can be used as module to be embedded in ventilator, has higher accuracy, responsiveness and safety.Using same central processing unit, system composition is simplified, and the breathing of ventilator and expectoration work is made to have reached real synchronization.

Description

A kind of ventilator
Technical field
The present invention relates to medical instruments field more particularly to a kind of ventilators with expectoration function.
Background technique
The patient that ventilator has been gone up for using, after especially establishing artificial airway, cough reflex weakens, or because of lung Function slump of disastrous proportions, breathing myasthenia etc., mostly cannot autonomous expectoration, easily cause that secretion is detained and blocking air flue makes lung Infection aggravates.Therefore, it to the patient of mechanical ventilation, needs periodically to carry out artificial expectoration processing.Currently, clinically the most commonly used is adopt With sputum aspirator tube suction sputum, but the suction sputum mode of this intrusive mood of sputum aspirator tube suction sputum, since the negative pressure of part is very high, in addition conduit Insertion and mobile, it is easy to air flue is damaged or air flue scar, meanwhile, the mechanical ventilation of patient can be interrupted, in addition sputum Removing be also not very thoroughly.
Patent WO2007054829 has been put forward for the first time a kind of and ventilator and has worked together, auxiliary patient respiration, cough, removal The expectoration system of patient airway secretion, when patient's expectoration, need not interrupt the eupnea of patient, can be according to preset expectoration Time and expectoration number carry out expectoration to patient, can at any time, expectoration immediately.
Patent CN 201510657436.2 then further enriches the patent, improves the safety of the expectoration system, faces Bed adaptability, when avoiding the work of expectoration machine the problems such as the alarm of ventilator, the phlegm of expectoration machine expectoration is collected into a collection In phlegm container, then the central negative pressure attraction system periodically configured by nurse by hospital siphons away sputum.
In two patents listed above, the triggering expectoration of expectoration machine is by the pressure or flow sensor in system Judge that ventilator implements the process of mechanical ventilation to patient, that is to say, that ventilator and expectoration machine do not communicate, expectoration machine Only passively by the pressure signal of detection ventilator gas circuit, then is handled, analyzes to obtain the information of breathing process, but this Following 3 problems would generally be brought:
1, accuracy and response quickly of system: being two different machines after all, cannot accomplish that ventilator and expectoration machine work Precise synchronization.Detect that the breathing process pressure signal of ventilator is converted into electricity in the pressure or flow sensor of expectoration system After signal, this signal will be after transmission, amplification, filtering, A/D conversion, then message handler is transferred to handle, and judges, issues Instruction, then using D/A conversion, power amplification, drivable DC voltage drives valve or blower work.This can controlled There is a degree of time lag in system, influences expectoration effect.
2, safety: being limited by various environmental conditions, breathe process detection may bring mistake as a result, being easy to make At erroneous judgement, breathing pipeline interior condition is very complicated, and the phlegm of the water or even patient's expectoration of gaseous vapor and liquid, having can It can be distributed in each corner of breathing pipeline, these factors will have a direct impact on the essence of the testing result of pressure or flow sensor Degree, even wrong result.To cause security risk.
3, piping connection is complicated, and occupied space volume is big, and at high cost, fault point, leakage point are more.
Summary of the invention
In view of the above-mentioned problems, the ventilator has higher accuracy, responsiveness the invention proposes a kind of ventilator And safety.
A kind of ventilator, comprising: suction line which is provided with and provide the positive pressure source of positive pressure, surge tank, two two for patient Logical saccule valve, the 2/2-way saccule valve carry out on-off switching control by an air pump and first two-position three-way valve; Expiration pipeline which is provided with outlet valve, and the outlet valve is by second two-position three-way valve by receiving from the pre- of surge tank If the compressed gas of constant pressure controls it;Expectoration pipeline, which is provided with for patient provide negative pressure negative pressure source and The fast gate valve being serially connected between negative pressure source and patient.
Ventilator of the invention, the beneficial effect is that, so that expectoration machine is can be used as module and be embedded in ventilator, thus Make ventilator that there is higher accuracy, responsiveness and safety.
Using same central processing unit control air-breathing, expiration and expectoration, system composition, and same central processing are simplified Device carries out Collaborative Control to each section, and the breathing of ventilator and expectoration work is made to have reached real synchronization.
Same central processing unit can carry out integration place to from the received information of multiple components such as sensor, valve and blower Reason, reduces time lag to a certain extent, improves the accuracy and fast-response of system, improve expectoration effect.
Detailed description of the invention
Fig. 1 is the gas circuit structure block diagram of one embodiment of the present invention.
Specific embodiment
Embodiments of the present invention are described with reference to the accompanying drawings, wherein identical component is presented with like reference characters.
Fig. 1 is a kind of gas circuit structure block diagram of embodiment of ventilator of the invention.
Ventilator of the invention includes suction line, expiration pipeline, expectoration pipeline and patient end pipeline;
Suction line include the air-in being sequentially connected, air filter, empty oxygen blending tank, the first turbofan, First pressure sensor, surge tank, 2/2-way saccule valve.There are one oxygen input ports for suction line, directly mixed with empty oxygen Close tank connection.First turbofan is in parallel with a suction control valve (proportional pressure valve or proportional directional valve), with The output pressure and flow of first turbofan are adjusted.2/2-way saccule valve passes through an air pump and one two three Port valve carries out on-off switching control, and then controls being switched in or out for suction line.The two-position three-way valve can be two-bit triplet Solenoid valve.
Expiration pipeline includes outlet valve, and outlet valve is by a two-position three-way valve by receiving the pre-set constant from surge tank The compressed gas of pressure controls it, and then controls being switched in or out for expiration pipeline.The two-position three-way valve can be two Position-3-way solenoid valve.
Expectoration pipeline includes by being input to the sequentially connected fast gate valve of output end, second pressure sensor, the second turbine wind Machine.Fast gate valve control expectoration pipeline is switched in or out.
Patient end pipeline is sequentially connected oxygen concentration sensor, flow sensor, output end by input terminal to output end It is connect with patient.
The delivery outlet of suction line and the input port of expiration pipeline, expectoration pipeline pool together, and connect with patient end pipeline It connects.Expiration pipeline is pooled together with expectoration pipeline delivery outlet and is connect with silencer, is taken out to patient's exhalation or the second turbofan Air-flow out is eliminated the noise.
Its course of work is as follows: when ventilator of the present invention is supplied gas to patient (i.e. when patient's air-breathing), the sky of ambient enviroment Gas enters empty oxygen blending tank 102 via filter 101, and empty oxygen blending tank 102 is configured with oxygen input port, low pressure or high pressure warp The oxygen that decompression, flow are adjusted by oxygen input port enters sky oxygen blending tank 102, and (due to belonging to routine techniques, the present invention does not show Out), in empty oxygen blending tank 102, air and the oxygen mix adjusted through inflow-rate of water turbine reach preset gas concentration.Oxygen is dense Degree sensor 110 at any time detects the gas concentration for being conveyed to patient, and data feedback in ventilator of the present invention Central processor adjusts oxygen input quantity, to carry out closed-loop control to oxygen concentration.It is mixed reach setting concentration gas into Enter the input port of the first turbofan 104, the gas of the first 104 pairs of turbofan input pressurizes, output certain flow and The mixed gas of pressure, the gas that pressure sensor 106, flow sensor 111 are responsible for exporting the first turbofan are pressed Power and flow detection, and pressure, the data on flows after detection be transferred to the central processing unit system of ventilator of the present invention, center Processor system is compared according to the pressure, data on flows and expected pressure data that detect, by controlling the first turbofan The aperture of 104 revolving speed and suction control valve 103 (proportional pressure valve or proportional directional valve), jointly controls the first whirlpool Wheel blower 104 is conveyed to the gas pressure and flow of patient 112.The effect of surge tank 107 is to provide the gas of a constant pressure Body makes the closing in air-breathing of outlet valve 116, carries out PEEP control to expiratory airflow when exhaling.
The mixed gas of first turbofan 104 output continues through surge tank 107,2/2-way saccule valve 113, oxygen Concentration sensor 110, flow sensor 111 complete breathing process into 112 intrapulmonary of patient.
At this point, what 2/2-way saccule valve 113 was to turn on, pump 108 does not start, and two-position three-way valve 109 is maintained at such as figure The control chamber of gas circuit position, saccule valve 113 is communicated with atmosphere.
And at this point, outlet valve 116 is to close, a part of compressed gas that surge tank 107 exports passes through two-bit triplet electricity Magnet valve 105, into outlet valve 116, since the gas pressure for entering outlet valve 116 at this time is larger, outlet valve 116 is closed It closes.
The expectoration pipeline in parallel with suction line is also to be blocked by fast gate valve 114 at this time.
When giving the depressed beam of conveying patient, it is transferred to expiration state, if you do not need to PEEP adjusting is carried out, at this point, the first turbine wind The idle running of machine 104 is shut down.Air pump 108 starts, and two-position three-way valve 109 must be electric, and position is switched to left position, the pressure that air pump 108 exports Contracting gas passes through two-position three-way valve 109, into 2/2-way saccule valve 113, closes the saccule valve, cuts off suction line.With This simultaneously, two-bit triplet solenoid valve 105 it is electric, be switched to right position, 116 control section of outlet valve communicates with atmosphere, causes to exhale Valve 116 is connected, and the gas of patient's intrapulmonary passes through flow sensor 111, oxygen concentration sensor 110, outlet valve 116, silencer 118 are discharged in atmosphere, complete exhalation process.
When giving the depressed beam of conveying patient, it is transferred to expiration state, if necessary to carry out PEEP adjusting, air pump 108 starts, and two three Port valve 109 must be electric, and position is switched to left position, and the compressed gas that air pump 108 exports passes through two-position three-way valve 109, into two two Logical saccule valve 113, closes saccule valve, cuts off suction line.Meanwhile the gas of patient's intrapulmonary passes through flow sensor 111, oxygen Gas concentration sensor 110, outlet valve 116, silencer 118 flow to atmosphere.Also at the same time, the first turbofan 104, which reduces, turns Speed and output pressure is jointly controlled by suction control valve (proportional pressure valve 103 or proportional pressure control valve), and passes through the first pressure The pressure of the detection output of force snesor 106 simultaneously sends central processing unit progress closed-loop control, the PEEP value phase of output and setting to (this value is equally likely to PEEP value to the constant pressure of pass, it is also possible to since the structural factor of outlet valve and preset PEEP value have Proportional characteristic) gas, which passes through two-bit triplet solenoid valve 105, into 116 control chamber of outlet valve, to flowing to atmosphere Exhaled air flow carries out peep control.In the process, two-bit triplet solenoid valve 105 is maintained at left position, can access and comes from the first whirlpool Take turns blower 104 gas, but the gas pressure lower than initial breath pressure thus at the control, outlet valve 116 open, exhale Air pipe is unimpeded, and the expiratory airflow of patient can pass through, and breath pressure gradually decreases, until controlling pressure with PEEP and reaching flat Weighing apparatus, expiration terminate, and outlet valve is closed.
When giving the depressed beam of conveying patient, when needing expectoration, start the second turbofan 117 first, in fast gate valve 114 and second Preset expectoration negative pressure is generated between turbofan 117.The negative pressure is detected and is fed back to by second pressure sensor 115 Central processor, and then, once central processing unit receives the information of air-breathing completion, air pump 108 starts, two-position three-way valve 109 Must be electric, position is switched to left position, and the compressed gas that air pump 108 exports passes through two-position three-way valve 109, into 2/2-way saccule valve 113, saccule valve is closed, suction line is cut off.First turbofan 104 continues to run and by suction control valve (ratio Pressure valve 103 or proportional pressure control valve) jointly control output pressure, and pass through the pressure of the detection output of first pressure sensor 106 And send central processing unit to and carry out closed-loop control, (this pressure should be far longer than aforementioned control PEEP to the constant pressure of output Pressure value, to ensure that outlet valve 116 is closed) gas by two-bit triplet solenoid valve 105, into 116 control chamber of outlet valve, closes Close outlet valve 116.At the same time, central processing unit controls fast gate valve 114 and opens, the negative pressure that the second turbofan 117 generates with The intrapulmonary barotropic gas of patient forms very high pressure difference, the gas of patient's intrapulmonary therefore quickly outflow, by flow sensor 111, oxygen concentration sensor 110, fast gate valve 114, pressure sensor 115, the second turbofan 117, silencer 118, are discharged to In atmosphere, an expectoration process is completed.
Embodiment described above, the only present invention more preferably specific embodiment, those skilled in the art is at this The usual variations and alternatives carried out within the scope of inventive technique scheme should be all included within the scope of the present invention.

Claims (8)

1. a kind of ventilator characterized by comprising
Suction line which is provided with and provide positive pressure source, the surge tank, 2/2-way saccule valve of positive pressure for patient, and described two two Logical saccule valve carries out on-off switching control by an air pump and first two-position three-way valve;
Expiration pipeline, which is provided with outlet valve, and the outlet valve comes from surge tank by receiving by second two-position three-way valve The compressed gas of pre-set constant pressure control it;
Expectoration pipeline which is provided with the shutter for providing the negative pressure source of negative pressure for patient and being serially connected between negative pressure source and patient Valve.
2. ventilator according to claim 1, which is characterized in that further include:
Central processing unit carries out Collaborative Control to ventilator each section according to the data of the sensor detection in ventilator.
3. ventilator according to claim 2, which is characterized in that the sensor in the ventilator includes:
First pressure sensor, setting is in suction line between positive pressure source and patient;
Oxygen concentration sensor, setting is in suction line between positive pressure source and patient;
Flow sensor, setting is in suction line between positive pressure source and patient;
Second pressure sensor is arranged in expectoration pipeline between negative pressure source and patient,
The sensor is connected with the central processing unit.
4. ventilator according to claim 2, which is characterized in that the positive pressure source is the first turbofan, the first turbine Blower is in parallel with a suction control valve.
5. ventilator according to claim 4, which is characterized in that the suction control valve is proportional pressure valve or ratio Example flow control valve.
6. ventilator according to claim 2, which is characterized in that the negative pressure source is the second turbofan.
7. ventilator according to claim 4, which is characterized in that the suction line has further included oxygen blending tank, Output enters the input port of first turbofan.
8. ventilator according to claim 3, which is characterized in that further include patient end pipeline, the oxygen is arranged thereon The output end of concentration sensor, flow sensor, patient end pipeline is connect with patient, the delivery outlet and exhaust tube of suction line Road, expectoration pipeline input port pool together, with patient end piping connection, expiration pipeline is collected in expectoration pipeline delivery outlet It is connect together with silencer.
CN201611039643.2A 2016-11-11 2016-11-11 A kind of ventilator Active CN106492321B (en)

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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN110368108A (en) * 2019-07-16 2019-10-25 武汉大学 Improve the device of root-canal filling effect

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103330962A (en) * 2013-07-08 2013-10-02 北京航空航天大学 Sputum suction device with breath simulating function
CN205252145U (en) * 2015-10-12 2016-05-25 濡新(北京)科技发展有限公司 Expectoration system
CN206837209U (en) * 2016-11-11 2018-01-05 濡新(北京)科技发展有限公司 A kind of lung ventilator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9833584B2 (en) * 2013-03-22 2017-12-05 Breathe Technologies, Inc. Portable ventilator secretion management system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103330962A (en) * 2013-07-08 2013-10-02 北京航空航天大学 Sputum suction device with breath simulating function
CN205252145U (en) * 2015-10-12 2016-05-25 濡新(北京)科技发展有限公司 Expectoration system
CN206837209U (en) * 2016-11-11 2018-01-05 濡新(北京)科技发展有限公司 A kind of lung ventilator

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