CN104225745B - Calibration device of breathing machine tester - Google Patents
Calibration device of breathing machine tester Download PDFInfo
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- CN104225745B CN104225745B CN201410554972.5A CN201410554972A CN104225745B CN 104225745 B CN104225745 B CN 104225745B CN 201410554972 A CN201410554972 A CN 201410554972A CN 104225745 B CN104225745 B CN 104225745B
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Abstract
The invention relates to a calibration device of a breathing machine tester. The calibration device comprises an oxygen concentration mixing detection module, a static detection module and a dynamic detection module. The oxygen concentration mixing detection module generates mixed gas with the oxygen concentration ranging from 21 percent to 100 percent, and the inspiration oxygen concentration of the calibrated breathing machine tester is calibrated and traced back. The static detection module is used for carrying out calibration and tracing on static flow and static pressure parameters of the breathing machine tester. The dynamic detection module is used for carrying out calibration and tracing on dynamic flow and dynamic pressure parameters of the breathing machine tester. The dynamic flow and dynamic pressure parameters of the breathing machine tester are calibrated and traced back with the same module, the capacity control mode is adopted, and it can be guaranteed that all parameters are stable and controllable when the calibration device is used as a standard signal generator.
Description
Technical field
The present invention relates to a kind of calibration of medical testing equipment (tracing to the source) device, more particularly to a kind of Ventilator Tester
Calibrating installation.
Background technology
Respirator is the important armarium in current clinical medicine field, as the armarium of multiparameter output, its meter
The characteristic of amount is directly connected to clinical application effect.Ventilator Tester is the equipment of detection respirator running parameter and precision,
Measurement and calibration for respirator is it can be understood as be the aggregation of sensor.
The metering of respirator is traced to the source, respirator particularly important for the safety and effectiveness guaranteeing respirator clinical practice
Metering trace to the source including the measurement and calibration of respirator and the measurement and calibration of Ventilator Tester.At present, respirator measurement and calibration
Problem has been obtained for solving, and the measurement and calibration of Ventilator Tester is then because existing Ventilator Tester calibrating installation exists
Tidal volume detection when gas serious leak, oxygen concentration mixing resultant error more than 30%, PIP, end expiratory positive pressure, suction
Exhale than parameters in series cannot detect etc. many not enough so that cannot be effectively by the measurement and calibration system of various Ventilator Testers
Come together, as the bridge of magnitude tracing, make to be formed between various Ventilator Testers and national measurement benchmark to meet to measure mark
The value chain of alignment request, the metering magnitude tracing thus resulting in respirator relevant operating parameter can not effectively be realized.
The effectively solving of Ventilator Tester measurement and calibration problem, the measurement and calibration for respirator product is provided precision base
Standard, so that it is guaranteed that the relevant unit such as metrological service at different levels, clinical unit, respirator goods producer is carried out using breath test instrument
The effectiveness of respirator output parameter measurement.To evading and prevent in respirator Clinical practice due to respirator output parameter not
Correct and respirator operation irregularity and the malpractice leading to or mistake play a significant role.
By calibrating to Ventilator Tester, it is possible to achieve between the running parameter of respirator and national measurement benchmark
Magnitude tracing.Thus providing precision reference and beasurement base for the measurement and calibration of respirator it is ensured that existing various respirator is surveyed
The effectiveness of the accuracy of detection of examination instrument, finally guarantees the effectiveness of respirator measurement and calibration work.
Content of the invention
It is an object of the invention to, provide a kind of new Ventilator Tester calibrating installation so as to test to respirator
The calibration of instrument dynamic flow and dynamic pressure parameter is traced to the source and is carried out using identical module, using volume control pattern it is ensured that each
Parameter stability, controlled；Wherein, when calibration being carried out to dynamic flow parameter tracing to the source, by three groups respectively by cylinder, push rod,
Push rod controller and the gas flow controller of grating scale composition, can make cylinder according to the capability value setting in the suction specifying
The simulation of respiratory is completed in gas, expiratory duration, when calibration being carried out to dynamic pressure parameter tracing to the source, permissible by test lung
Form real closed-loop path it is ensured that the stablizing of gas pressure.
Another object of the present invention is to, provide a kind of new Ventilator Tester calibrating installation so as to pass through height
Purity nitrogen gas and medical high-purity oxygen carry out ratio mixing according to setting value, and oxygen concentration mixing in mixed gas can be made equal
Even, accurate, export uniform, stable mixed gas, and any setting ratio mixing, oxygen concentration can be realized in gamut scope
Adjustable, pure oxygen flow velocity is adjustable.
The object of the invention to solve the technical problems is to be realized using following technical scheme.Carry according to the present invention
A kind of Ventilator Tester calibrating installation going out, comprising: oxygen concentration hybrid detection module, Static Detection module and dynamic detection
Module；Described oxygen concentration hybrid detection module produces the mixed gas that oxygen ranges are 21%～100%, and to being calibrated
The air-breathing oxygen concentration of Ventilator Tester carries out calibration and traces to the source；Described Static Detection module is to the Ventilator Tester being calibrated
Quiescent flow and static pressure parameter carry out calibration and trace to the source；Described dynamic detection module is dynamic to the Ventilator Tester being calibrated
State flow and dynamic pressure parameter carry out calibration and trace to the source；Wherein, described dynamic detection module is provided with three groups of gas flow controllers,
Gas flow controller described in every group all includes: cylinder, push rod, push rod controller and grating scale, and gas flow described in three groups
The volume of the described cylinder of controller is different；Wherein, the described push rod controller of gas flow controller described in every group with described
Push rod connects, and described push rod is connected with the piston rod of described cylinder, drives the piston of described piston rod to do in described cylinder past
Multiple motion simulation respiratory；The air inlet of described cylinder is connected by pipeline with air source of the gas, the gas outlet of described cylinder with
The import of the Ventilator Tester being calibrated is connected by pipeline；Described grating scale is arranged at described push rod, detects described push rod
Displacement；Wherein, when the dynamic flow parameter to the Ventilator Tester being calibrated carries out calibration and traces to the source, according to setting
Calibration point is respectively started gas flow controller described in three groups；And in the dynamic pressure parameter to the Ventilator Tester being calibrated
When carrying out calibration and tracing to the source, only start gas flow controller described in one of which；Described dynamic detection module is additionally provided with test lung,
Described test lung is connected by pipeline with the gas outlet of the Ventilator Tester being calibrated, and makes described dynamic detection module and by school
Accurate Ventilator Tester forms closed-loop path it is ensured that the stablizing of gas pressure；Wherein, connect described cylinder gas outlet with
Gas mass flow gauge, piezometer, Pitot tube and minute-pressure are additionally provided with the pipeline of the air inlet of the Ventilator Tester being calibrated
Difference transmitter.
The purpose of the present invention and solve its technical problem and can also be further achieved by the following technical measures.
Aforesaid Ventilator Tester calibrating installation, wherein described in three groups, the described cylinder of gas flow controller is to pass through
Pass through pipeline respectively with described air source of the gas after the parallel connection of valve island and the Ventilator Tester that is calibrated is connected；Three groups of gas flow controls
The volume of the described cylinder of device processed is respectively 0～200m l, 0～600m l and 0～1500m l；To the respirator being calibrated
The dynamic pressure parameter of tester carries out calibration when tracing to the source, and the volume only starting described cylinder is described in one group of 0～600m l
Gas flow controller.
Aforesaid Ventilator Tester calibrating installation, wherein in described cylinder and the described valve of described gas flow controller
The pipeline that island connects is provided with two position three-way valve, and the first interface of described two position three-way valve is connected by pipeline with described valve island,
The second interface of described two position three-way valve is connected by pipeline with the gas outlet of described cylinder, and the 3rd of described two position three-way valve connects
Mouth is connected by pipeline with the air inlet of described cylinder；Be additionally provided with check valve in described dynamic detection module, described test lung with
The entrance of described check valve connects, the outlet emptying of described check valve；In the dynamic flow to the Ventilator Tester being calibrated
And dynamic pressure parameter is when carrying out calibration and tracing to the source, with piston, the reciprocating motion in described cylinder comes described gas flow controller
Simulated respiration process；Wherein, when simulating exhalation process, described air source of the gas and described cylinder pass through the conducting of described valve island, to
Described cylinder provides breathing air used, now the first interface of described two position three-way valve and the conducting of the 3rd interface, described list
Open to valve, described test lung is by the outside aerofluxuss of described check valve；When simulating breathing process, described cylinder be calibrated
Ventilator Tester passes through the conducting of described valve island, supply gas to the Ventilator Tester being calibrated, now described two position three-way valve
First interface is turned on second interface, described closed check valve, and the Ventilator Tester that gas passes through to be calibrated enters described mould
Intend lung.
Aforesaid Ventilator Tester calibrating installation, wherein in the dynamic pressure parameter to the Ventilator Tester being calibrated
When carrying out calibration and tracing to the source, described Pitot tube is to use cooperatively with described micro-pressure-difference transmitter, detects " PIP " value.
Aforesaid Ventilator Tester calibrating installation, wherein said dynamic detection module is additionally provided with constant voltage source of the gas, described perseverance
Pressurized air source provides lasting in pipeline when the dynamic pressure parameter to the Ventilator Tester being calibrated carries out calibrating and traces to the source
Pressure, realizes the effective simulation to end expiratory positive pressure.
Aforesaid Ventilator Tester calibrating installation, wherein said constant voltage source of the gas is to be continued in pipeline with small blast fan
There is provided a stable little pressure as end expiratory positive pressure.
Aforesaid Ventilator Tester calibrating installation, wherein said oxygen concentration hybrid detection module be by high-purity nitrogen with
Medical high-purity oxygen carries out ratio according to setting value and is mixed to get the mixed gas that oxygen ranges are 21%～100%；Institute
State oxygen concentration hybrid detection module and be provided with gas mixing pipe, high-purity nitrogen and medical high-purity oxygen be respectively by with described mixed gas
Two pipelines that one end of pipe connects enter mixing in described gas mixing pipe；Wherein, two described pipelines are equipped with filter,
Pressure gauge, pressure regulator valve, check valve, mass flow controller and diaphragm valve, are connected with two described pipelines in described gas mixing pipe
One end is additionally provided with vacuum generator；The other end of described gas mixing pipe is passed through with the entry/exit QI KOU of the Ventilator Tester being calibrated
Pipeline connects, and is provided with humiture on the pipeline that described gas mixing pipe is connected with the entry/exit QI KOU of the Ventilator Tester being calibrated
Instrument, effusion meter, oxygen concentration instrument, diaphragm valve, pressure regulator valve and pressure gauge.
Aforesaid Ventilator Tester calibrating installation, wherein said oxygen concentration instrument is to detect oxygen using the paramagnetism of oxygen
Concentration to carry out calibration to the air-breathing oxygen concentration of the Ventilator Tester being calibrated to trace to the source.
Aforesaid Ventilator Tester calibrating installation, the other end of wherein said gas mixing pipe is also connected with a branch road, air
The pipeline connecting described gas mixing pipe and the entry/exit QI KOU of the Ventilator Tester being calibrated is entered by described branch road, realizes to sky
The calibration of gas；Filter, pressure gauge, pressure regulator valve and diaphragm valve are wherein sequentially provided with described branch road.
Aforesaid Ventilator Tester calibrating installation, described dynamic detection module can be to the Ventilator Tester being calibrated
Following parameter calibrated: tidal volume, gas flow rate, inspiratory duration, expiratory duration, inspiratory/expiratory, respiratory frequency, minute ventilation
Amount, Mean airway pressure, PIP, end expiratory positive pressure, breath holding time, platform pressure and compliance.
The present invention compared with prior art has clear advantage and beneficial effect.By technique scheme, the present invention
Ventilator Tester calibrating installation at least has following advantages and a beneficial effect:
The school to Ventilator Tester dynamic flow and dynamic pressure parameter for the Ventilator Tester calibrating installation of the present invention
It is to be carried out using identical module that standard is traced to the source, using volume control pattern it is ensured that parameters are stable, controlled；Wherein, to dynamic
State flow parameter carries out calibration when tracing to the source, by three groups of gases being made up of cylinder, push rod, push rod controller and grating scale respectively
Flow controller, can make cylinder complete the mould of respiratory in the air-breathing of regulation, expiratory duration according to the capability value setting
Intend, when calibration being carried out to dynamic pressure parameter tracing to the source, real closed-loop path can be formed by test lung it is ensured that gas pressure
The stablizing of power.
The Ventilator Tester calibrating installation of the present invention passes through high-purity nitrogen and medical high-purity oxygen according to setting
Value carries out ratio mixing, can make oxygen concentration mix homogeneously in mixed gas, accurate, uniform, the stable mixed gas of output, and
Any setting ratio mixing can be realized in gamut scope, oxygen concentration is adjustable, and pure oxygen flow velocity is adjustable.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, and in order to allow the above and other objects, features and advantages of the present invention can
Become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Brief description
Fig. 1 is that the dynamic detection module of Ventilator Tester calibrating installation of the present invention carries out dynamic flow parametric calibration and traces to the source
Composition structural representation.
Fig. 2 is that the dynamic detection module of Ventilator Tester calibrating installation of the present invention carries out dynamic pressure parametric calibration and traces to the source
Composition structural representation.
Fig. 3 is the composition structural representation of the oxygen concentration hybrid detection module of Ventilator Tester calibrating installation of the present invention.
Specific embodiment
For further illustrating that the present invention is to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to according to its specific embodiment of Ventilator Tester calibrating installation proposed by the present invention, structure, spy
Levy and its effect, after describing in detail such as.
The Ventilator Tester calibrating installation of the present invention is used to calibrate the standard of measurement of Ventilator Tester, permissible
It is not understood as one kind and has the respirator of " in high precision ", or perhaps collect standard signal generation, signal monitoring, comparing in one
The equipment of body.Calibrating installation is mainly made up of oxygen concentration hybrid detection module, Static Detection module and dynamic detection module, permissible
Realize the air-breathing oxygen concentration to Ventilator Tester, quiescent flow and static pressure parameter, dynamic flow and dynamic pressure parameter
Calibration trace to the source.
Air-breathing oxygen concentration is one of key parameter of Ventilator Tester, and clinically the scope of the most frequently used oxygen concentration is 40%
～60%.Prior art is mainly utilized in the method for proportion of installation regulating valve in the pipeline mixing work(to realize gas with various
Energy.The oxygen concentration of Ventilator Tester calibrating installation of the present invention adjust be by by high-purity nitrogen and medical high-purity oxygen by
According to setting value carry out ratio be mixed to get needs mixed gas (due to two kinds of gas concentrations slightly difference it is impossible to fully according to
Ratio value mixes, therefore mixed gas when add certain proportionality coefficient), and using oxygen paramagnetism to the respirator being calibrated
The air-breathing oxygen concentration of tester carries out calibration and traces to the source.As calibrating installation, Ventilator Tester calibrating installation of the present invention needs to cover
Lid more fully measurement range, therefore, the measurement range of the oxygen concentration of Ventilator Tester calibrating installation of the present invention is 21%～
100%, stepping 1%, certainty of measurement≤1%.
Refer to shown in Fig. 3, be the composition of the oxygen concentration hybrid detection module of Ventilator Tester calibrating installation of the present invention
Structural representation.The oxygen concentration hybrid detection module of Ventilator Tester calibrating installation of the present invention, mainly by gas mixing pipe 107, filters
Device 101, pressure gauge 102,104, pressure regulator valve 103,113, mass flow controller 105, pneumatic diaphragm valve 106, vacuum generator
108, humiture instrument 109, effusion meter 110,116, oxygen concentration instrument 111, manual diaphragm valve 112, diaphragm valve 115 and pipeline group
Become.
Wherein, high-purity nitrogen (n2) and medical high-purity oxygen (o2) respectively by being connected with one end of gas mixing pipe 107
Article two, pipeline enters mixing in gas mixing pipe 107, two pipelines are equipped with filter 101, pressure gauge 102, pressure regulator valve 103,
Pressure gauge 104, mass flow controller 105 and pneumatic diaphragm valve 106, the one end being connected in two pipelines of gas mixing pipe 107 and this
It is additionally provided with vacuum generator 108, vacuum generator 108 is additionally provided with pneumatic diaphragm valve 106 on the pipeline being connected with gas mixing pipe 107
With pressure gauge 104.The other end of gas mixing pipe 107 is connected by pipeline with the entry/exit QI KOU of the Ventilator Tester being calibrated,
The pipeline that gas mixing pipe is connected with the entry/exit QI KOU of the Ventilator Tester being calibrated be provided with humiture instrument 109, effusion meter 110,
Oxygen concentration instrument 111, manual diaphragm valve 112, pressure regulator valve 113, pressure gauge 104, pneumatic diaphragm valve 115 and effusion meter 116.Its
In, the oxygen concentration instrument 111 of the present invention is to detect oxygen concentration come to the Ventilator Tester being calibrated using the paramagnetism of oxygen
Air-breathing oxygen concentration carry out calibration and trace to the source.
As shown in figure 3, the oxygen concentration hybrid detection module in the present invention also can be provided with a branch road, this branch road and gas mixing pipe
107 other end connects, and air (ai r) is entered by this branch road and connects gas mixing pipe 107 and the Ventilator Tester being calibrated
The pipeline of entry/exit QI KOU, it is possible to achieve the calibration to air.Wherein, this branch road is provided with filter 101, pressure gauge 102,
Pressure regulator valve 103, pressure gauge 104 and pneumatic diaphragm valve 106.
The oxygen concentration hybrid detection module of the present invention can make oxygen concentration mix homogeneously, accurate, uniform, stable the mixing of output
Close gas, and can be mixed with any setting ratio in gamut scope, its oxygen concentration is adjustable, pure oxygen flow velocity is adjustable (respirator
Tester has self-checking function, needs to lead to pure oxygen to it with the flow velocity of more than 10l/mi n).
The Static Detection module of the present invention can be to the quiescent flow of the Ventilator Tester being calibrated and static pressure Radix Talini Paniculati
Number carries out calibration and traces to the source, and dynamic detection module can be to the dynamic flow of the Ventilator Tester being calibrated and dynamic pressure parameter
Carry out calibration to trace to the source.In order to the respiratory of preferably mock standard, the Ventilator Tester calibrating installation of the present invention
Dynamic detection module adopts volume control pattern, therefore when calibrating installation is as " reference signal generator ", its parameters
Stable, controlled.
Refer to shown in Fig. 1 and Fig. 2, Fig. 1 is that the dynamic detection module of Ventilator Tester calibrating installation of the present invention is carried out
The composition structural representation that dynamic flow parametric calibration is traced to the source, Fig. 2 is the dynamic inspection of Ventilator Tester calibrating installation of the present invention
Survey module and carry out the composition structural representation that dynamic pressure parametric calibration is traced to the source.Ventilator Tester calibrating installation of the present invention dynamic
State detection module mainly by gas flow controller, air source of the gas 215, piezometer 216, Pitot tube and micro-pressure-difference transmitter 217,
Gas mass flow gauge 219, test lung 220 and pipeline composition.
Wherein, it is provided with three groups of gas flow controllers in dynamic detection module, every group of gas flow controller all includes: gas
Cylinder 201,202 or 203, push rod 204,205 or 206, push rod controller 207,208 or 209 and grating scale 210,211 or 212, and
And the volume of three cylinders 201,202,203 of three groups of gas flow controllers is different.Wherein, every group of gas flow controller
Push rod controller 207,208,209 respectively with corresponding push rod 204,205,206 connect, push rod 204,205,206 respectively with right
The piston rod of the cylinder 201,202,203 answered connects, and drives the piston of piston rod to do reciprocal fortune in cylinder 201,202,203
Dynamic, simulated respiration process.The air inlet of three cylinders 201,202,203 is connected by pipeline with air source of the gas 215, three cylinders
201st, 202,203 gas outlet is connected by pipeline with the air inlet of the Ventilator Tester 300 being calibrated.Grating scale 210,
211st, 212 it is respectively arranged at corresponding push rod 204,205,206, the displacement of detection push rod 204,205,206.
The present invention when the dynamic flow parameter to the Ventilator Tester 300 being calibrated carries out calibration and traces to the source, according to setting
The calibration point put is respectively started three groups of gas flow controllers, and in the dynamic pressure to the Ventilator Tester 300 being calibrated
Parameter carries out calibration when tracing to the source, and only starts one of which gas flow controller.
Test lung 220 is connected by pipeline with the gas outlet of the Ventilator Tester 300 being calibrated, and makes dynamic detection module
Form closed-loop path with the Ventilator Tester 300 that is calibrated it is ensured that the stablizing of gas pressure.
Piezometer 216, gas mass flow gauge 219, Pitot tube be arranged at micro-pressure-difference transmitter 217 be connected cylinder 201,
202nd, on 203 gas outlet and the pipeline of the air inlet of the Ventilator Tester 300 being calibrated.The respirator being calibrated is being surveyed
When the dynamic flow parameter of examination instrument 300 carries out calibration and traces to the source, piezometer 216, Pitot tube and micro-pressure-difference transmitter 217 do not work.
When the dynamic pressure parameter to the Ventilator Tester 300 being calibrated carries out calibration and traces to the source, Pitot tube and micro-pressure-difference transmitter
217 use cooperatively, and detect " PIP " value.
In a preferred embodiment of the present invention, the cylinder 201,202,203 of three groups of gas flow controllers is by valve
Pass through pipeline respectively with air source of the gas 215 after the parallel connection of island 214 and the Ventilator Tester 300 that is calibrated is connected.Three groups of gas streams
The volume of the cylinder 201,202,203 of amount controller is respectively 0～200m l, 0～600m l and 0～1500m l.Wherein, exist
When carrying out calibration to the dynamic pressure parameter of the Ventilator Tester 300 being calibrated and tracing to the source, the volume that only starts cylinder is 0～
One group of gas flow controller of 600m l.
In a preferred embodiment of the present invention, connect on cylinder 201,202,203 and the valve island 214 of gas flow controller
The pipeline connecing is provided with two position three-way valve 213, and the first interface a of two position three-way valve 213 is connected by pipeline with valve island 214, and two
Second interface b of position three-way valve 213 is connected by pipeline with the gas outlet of cylinder 201,202,203, and the of two position three-way valve 213
Three interface c are connected by pipeline with the air inlet of cylinder 201,202,203.It is additionally provided with check valve 221, mould in dynamic detection module
Intend lung 220 to be connected with the entrance of check valve 221, the outlet emptying of check valve 221.
When the dynamic flow to the Ventilator Tester 300 being calibrated and dynamic pressure parameter carry out calibration and trace to the source, gas
With piston, the reciprocating motion in cylinder 201,202 or 203 carrys out simulated respiration process to body flow controller.Wherein, exhale in simulation
During gas process, air source of the gas 215 is turned on by valve island 214 with cylinder 201,202 or 203, provides to cylinder 201,202 or 203
Breathing air used, now first interface a and the 3rd interface c conducting of two position three-way valve 213, check valve 221 is opened, simulation
Lung 220 passes through the outside aerofluxuss of check valve 221.When simulating breathing process, cylinder 201,202 or 203 and the respirator being calibrated
Tester 300 is turned on by valve island 214, supplies gas to the Ventilator Tester 300 being calibrated, now the of two position three-way valve 213
One interface a is turned on second interface b, and check valve 221 is closed, and the Ventilator Tester 300 that gas passes through to be calibrated enters simulation
Lung 220.
End expiratory positive pressure is all a very important index in respirator and Ventilator Tester calibration, and it represents
The pressure of alveolar, the present invention passes through to arrange constant voltage source of the gas 218 in dynamic detection module, to the Ventilator Tester being calibrated
300 dynamic pressure parameter carries out calibration when tracing to the source, and provides lasting pressure it is achieved that having to end expiratory positive pressure in pipeline
Effect simulation.Wherein, constant voltage source of the gas 218 can be persistently to provide a stable little pressure to make in pipeline with small blast fan
For end expiratory positive pressure, and carrying out when calibration is traced to the source not in the dynamic flow parameter to the Ventilator Tester 300 being calibrated
Work.
The Ventilator Tester calibrating installation of the present invention can be to the dynamic flow parameter of the Ventilator Tester being calibrated
Tidal volume, gas flow rate, inspiratory duration, expiratory duration, inspiratory/expiratory, respiratory frequency and minute ventilation calibrated.
Wherein, when calibrating to tidal volume, it is according to tidal volume test point, controls corresponding one group by calibration software
Flow controller starts, and makes it provide accurate tidal volume values according to setting value, passes through gas mass flow gauge to cylinder simultaneously
The overall process being evacuated every time and supplying gas is integrated, and plays auxiliary supervisory function bit.When calibrating to gas flow rate, it is by gas
The sampling of weight effusion meter is read and is preserved corresponding data.When calibrating to inspiratory duration, it is by calibration software setting value,
Internal gas have been pushed away the time used by record cylinder, and compare with the duration of ventilation of the Ventilator Tester being calibrated,
Reach the purpose of calibration.When calibrating to expiratory duration, it is by calibration software setting value, record test lung by its gas internal
The body drained time used, and do not have the time that gas passes through to compare with the Ventilator Tester being calibrated, reach and cry school
Accurate purpose.When calibrating to inspiratory/expiratory, it is by the ratio of above-mentioned " inspiratory duration " and " expiratory duration ", soft by calibrating
Part calculates and obtains.When calibrating to minute ventilation, it is that the capacity that cylinder per minute is supplied gas adds up, and soft by calibrating
Part is calculated.
The Ventilator Tester calibrating installation of the present invention can be to the dynamic pressure parameter of the Ventilator Tester being calibrated
Mean airway pressure, PIP, end expiratory positive pressure, breath holding time, platform pressure and compliance calibrated.
Wherein, when carrying out calibration to dynamic pressure parameter and tracing to the source, only starting a volume is that (0～600) m l cylinder is located
Gas flow controller, when calibrating to PIP, cylinder is to supply gas according to the stable flow velocity of " half is trapezoidal ", by minute-pressure
Differ from transmitter and Pitot tube detects the peak value of pressure change during entirely supplying gas, that is, obtain PIP.When to end-tidal just
When pressure is calibrated, it is persistently to provide a sufficiently stable little airflow by constant voltage source of the gas, this stable pressure is exactly to exhale
Last malleation, supplies scope: ± 12kpa.When calibrating to Mean airway pressure, the mean pressure of motion of supplying gas every time/be evacuated
Power, is to sample using piezometer to obtain the meansigma methodss of multiple reading, by calculating.When calibrating to breath holding time, that is,
Time interval between supplying gas every time and being evacuated, is by calibration software control, makes time ＜ 1s, and this time needs adjustable.When
When platform pressure is calibrated, i.e. the plateau pressure of breath holding time finish time, need calibration software when breath holding time stops
Record this pressure value.When calibrating to compliance, it is to be arranged and provided by test lung numerical value, generally 0.2.
The above, be only presently preferred embodiments of the present invention, not the present invention is made with any pro forma restriction, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any is familiar with this professional technology people
Member, in the range of without departing from technical solution of the present invention, a little change or is modified to when the technology contents of available the disclosure above are made
The Equivalent embodiments of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the technical spirit pair of the present invention
Any simple modification, equivalent variations and modification that above example is made, all still fall within the range of technical solution of the present invention.
Claims (10)
1. a kind of Ventilator Tester calibrating installation is it is characterised in that comprising: oxygen concentration hybrid detection module, Static Detection mould
Block and dynamic detection module；Described oxygen concentration hybrid detection module produces the mixed gas that oxygen ranges are 21%～100%,
And calibration is carried out to the air-breathing oxygen concentration of the Ventilator Tester being calibrated trace to the source；Described Static Detection module is to exhaling of being calibrated
The quiescent flow of suction machine tester and static pressure parameter carry out calibration and trace to the source；Described dynamic detection module is to the breathing being calibrated
The dynamic flow of machine tester and dynamic pressure parameter carry out calibration and trace to the source；
Wherein, described dynamic detection module is provided with three groups of gas flow controllers, and gas flow controller described in every group all includes:
Cylinder (201,202,203), push rod (204,205,206), push rod controller (207,208,209) and grating scale (210,211,
212), and the described cylinder (201,202,203) of gas flow controller described in three groups volume different；Wherein, described in every group
The described push rod controller (207,208,209) of gas flow controller is connected with described push rod (204,205 or 206), described
Push rod (204,205,206) is connected with the piston rod of described cylinder (201,202,203), and the piston driving described piston rod is in institute
State the simulated respiration process that moves reciprocatingly in cylinder (201,202,203)；The air inlet of described cylinder (201,202,203) and sky
Gas source of the gas (215) is connected by pipeline, the gas outlet of described cylinder (201,202,203) and the Ventilator Tester being calibrated
(300) import is connected by pipeline；Described grating scale (210,211,212) is arranged at described push rod (204,205,206), inspection
Survey the displacement of described push rod (204,205,206)；Wherein, in the dynamic flow to the Ventilator Tester (300) being calibrated
Parameter carries out calibration when tracing to the source, and is respectively started gas flow controller described in three groups according to the calibration point of setting；And to by school
The dynamic pressure parameter of accurate Ventilator Tester (300) carries out calibration when tracing to the source, and only starts gas flow described in one of which
Controller；
Described dynamic detection module is additionally provided with test lung (220), described test lung (220) and the Ventilator Tester being calibrated
(300) gas outlet is connected by pipeline, makes described dynamic detection module and closes with Ventilator Tester (300) formation being calibrated
Close loop it is ensured that the stablizing of gas pressure；Wherein, connecting the gas outlet of described cylinder (201,202,203) and be calibrated
Piezometer (216), gas mass flow gauge (219), Pitot tube are additionally provided with the pipeline of air inlet of Ventilator Tester (300)
With micro-pressure-difference transmitter (217).
2. Ventilator Tester calibrating installation according to claim 1 is it is characterised in that gas flow wherein described in three groups
The described cylinder (201,202,203) of controller is to pass through pipeline and described air source of the gas after valve island (214) parallel connection respectively
And the Ventilator Tester (300) that is calibrated connects (215)；Three groups of gas flow controllers described cylinder (201,202,
203) volume is respectively 0～200ml, 0～600ml and 0～1500ml；To the Ventilator Tester (300) being calibrated
Dynamic pressure parameter carries out calibration when tracing to the source, and the volume only starting described cylinder is the gas flow control described in a group of 0～600ml
Device processed.
3. Ventilator Tester calibrating installation according to claim 2 is it is characterised in that wherein in described gas flow control
The pipeline that the described cylinder (201,202,203) of device processed is connected with described valve island (214) is provided with two position three-way valve (213), institute
The first interface (a) stating two position three-way valve (213) is connected by pipeline with described valve island (214), described two position three-way valve (213)
Second interface (b) be connected by pipeline with the gas outlet of described cylinder (201,202,203), described two position three-way valve (213)
The 3rd interface (c) be connected by pipeline with the air inlet of described cylinder (201,202,203)；
It is additionally provided with check valve (221) in described dynamic detection module, described test lung (220) is entered with described check valve (221)
Mouth connects, the outlet emptying of described check valve (221)；
When the dynamic flow to the Ventilator Tester (300) being calibrated and dynamic pressure parameter carry out calibration and trace to the source, described
With piston, the reciprocating motion in described cylinder (201,202,203) carrys out simulated respiration process to gas flow controller；Wherein, exist
During simulation exhalation process, described air source of the gas (215) and described cylinder (201,202,203) pass through described valve island (214) conducting,
There is provided breathing air used to described cylinder (201,202,203), the now first interface of described two position three-way valve (213)
(a) and the 3rd interface (c) conducting, described check valve (221) opens, described test lung (220) pass through described check valve (221) to
Outer aerofluxuss；When simulating breathing process, described cylinder (201,202,203) and the Ventilator Tester (300) being calibrated pass through
The conducting of described valve island (214), supplies gas to the Ventilator Tester (300) being calibrated, now the of described two position three-way valve (213)
One interface (a) is turned on second interface (b), and described check valve (221) is closed, and gas passes through the Ventilator Tester being calibrated
(300) enter described test lung (220).
4. Ventilator Tester calibrating installation according to claim 1 is it is characterised in that wherein to the breathing being calibrated
The dynamic pressure parameter of machine tester (300) carries out calibration when tracing to the source, and described Pitot tube and micro-pressure-difference transmitter (217) are cooperations
Use, detect " PIP " value.
5. Ventilator Tester calibrating installation according to claim 1 is it is characterised in that wherein said dynamic detection module
It is additionally provided with constant voltage source of the gas (218), described constant voltage source of the gas (218) is in the dynamic pressure to the Ventilator Tester (300) being calibrated
Parameter carries out calibrating provides lasting pressure in pipeline when tracing to the source, realize the effective simulation to end expiratory positive pressure.
6. Ventilator Tester calibrating installation according to claim 5 is it is characterised in that wherein said constant voltage source of the gas (218)
Be using small blast fan to pipeline in persistently provide a stable little pressure as end expiratory positive pressure.
7. the Ventilator Tester calibrating installation according to any claim in claim 1 to 6 is it is characterised in that wherein
Described oxygen concentration hybrid detection module is according to setting value, high-purity nitrogen and medical high-purity oxygen to be carried out ratio mix
The mixed gas being 21%～100% to oxygen ranges；Described oxygen concentration hybrid detection module is provided with gas mixing pipe (107), high
Purity nitrogen gas are to enter institute by two pipelines being connected with one end of described gas mixing pipe (107) with medical high-purity oxygen respectively
State mixing in gas mixing pipe (107)；Wherein, filter (101), pressure gauge (102,104) are equipped with two described pipelines, adjust
Pressure valve (103), mass flow controller (105) and diaphragm valve (106), in described gas mixing pipe (107) with two described pipelines even
The one end connecing is additionally provided with vacuum generator (108)；The other end of described gas mixing pipe (107) and the Ventilator Tester being calibrated
Air inlet is connected by pipeline, is provided with the pipeline that described gas mixing pipe is connected with the air inlet of the Ventilator Tester being calibrated
Humiture instrument (109), effusion meter (110,116), oxygen concentration instrument (111), diaphragm valve (112,115), pressure regulator valve (113) and pressure
Power table (104).
8. Ventilator Tester calibrating installation according to claim 7 is it is characterised in that wherein said oxygen concentration instrument
(111) it is using the paramagnetism detection oxygen concentration of oxygen, the air-breathing oxygen concentration of the Ventilator Tester being calibrated to be calibrated
Trace to the source.
9. Ventilator Tester calibrating installation according to claim 7 is it is characterised in that wherein said gas mixing pipe (107)
The other end is also connected with a branch road, and air is entered the respirator survey connecting described gas mixing pipe (107) and being calibrated by described branch road
The pipeline of the air inlet of examination instrument, realizes the calibration to air；Filter (101), pressure are wherein sequentially provided with described branch road
Table (102,104), pressure regulator valve (103) and diaphragm valve (106).
10. Ventilator Tester calibrating installation according to claim 1 is it is characterised in that wherein said dynamic detection module
The following parameter of the Ventilator Tester being calibrated can be calibrated: when tidal volume, gas flow rate, inspiratory duration, expiration
Between, inspiratory/expiratory, respiratory frequency, minute ventilation, Mean airway pressure, PIP, end expiratory positive pressure, breath holding time, platform pressure
And compliance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410554972.5A CN104225745B (en) | 2014-10-17 | 2014-10-17 | Calibration device of breathing machine tester |
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| CN201410554972.5A CN104225745B (en) | 2014-10-17 | 2014-10-17 | Calibration device of breathing machine tester |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105987724A (en) * | 2015-02-26 | 2016-10-05 | 顺力西科技股份有限公司 | Test tool for respirator |
| CN104857607B (en) * | 2015-05-26 | 2017-09-05 | 深圳市安保科技有限公司 | A kind of oxygen concentration calibrating installation |
| CN106310472B (en) * | 2015-06-23 | 2019-02-22 | 湖南明康中锦医疗科技发展有限公司 | Ventilator calibrator (-ter) unit and ventilator calibration system |
| CN107297007B (en) * | 2016-04-16 | 2020-01-10 | 湖南明康中锦医疗科技发展有限公司 | Method and device for measuring operating parameters of breathing machine |
| CN109674476A (en) * | 2018-12-17 | 2019-04-26 | 中国医科大学附属第一医院 | A kind of measurement device reactive for the Respiratory Center Drive of chemical stimulation |
| CN111921048B (en) * | 2020-08-03 | 2022-06-14 | 暨南大学 | Device and method for external calibration of breathing machine |
| CN114028665A (en) * | 2021-09-27 | 2022-02-11 | 深圳市计量质量检测研究院（国家高新技术计量站、国家数字电子产品质量监督检验中心） | Automatic metering calibration method and device for breathing machine and storage medium |
| CN114306848A (en) * | 2022-01-06 | 2022-04-12 | 周子衣 | Portable pressure calibrator used with breathing machine |
| CN115970118B (en) * | 2022-12-22 | 2023-08-04 | 宁波市计量测试研究院(宁波新材料检验检测中心) | Respiratory humidification therapeutic instrument calibrating device |
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