CN209499730U - Partial pressure of carbon dioxide in endexpiratory gas measuring device and system - Google Patents
Partial pressure of carbon dioxide in endexpiratory gas measuring device and system Download PDFInfo
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- CN209499730U CN209499730U CN201821730892.0U CN201821730892U CN209499730U CN 209499730 U CN209499730 U CN 209499730U CN 201821730892 U CN201821730892 U CN 201821730892U CN 209499730 U CN209499730 U CN 209499730U
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Abstract
The utility model provides a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device and system, which includes: sequentially connected expiration latter end gas sampler, calculates end and display end；Wherein, expiration latter end gas sampler include sample unit, be arranged in sample unit exhaled gas exit export-oriented check valve, and the sensor array being connected with sample unit；Sample unit is used to acquire the expiration end-tidal gas of patient；Export-oriented check valve reaches when preset closure requires for the gas pressure in sample unit closes, so that sample unit saves the expiration end-tidal gas of patient；Sensor array is used to measure the carbon dioxide concentration value and ambient atmosphere pressure of the expiration end-tidal gas in sample unit, is also used to for carbon dioxide concentration value and ambient atmosphere pressure being transmitted to calculating end.The utility model can measure the gas concentration lwevel and ambient atmosphere pressure of expiration latter end, show that carbon dioxide divides after handling gas concentration lwevel and ambient atmosphere pressure.
Description
Technical field
The utility model relates to carbon dioxide to divide field of measuring technique, more particularly, to a kind of end-expiratory carbon dioxide point
Pressure measuring device and system.
Background technique
Arterial partial pressure of carbon dioxide is the key index for diagnosing respiratory failure.But to measure arterial blood carbon dioxide point
Pressure not only needs to carry out arteriopuncture and obtains blood sample, but also needs blood gas analyzer to divide blood sample carbon dioxide and measure, these
Know-how and equipment are required, is not that any scene even different medical unit can be carried out.
Since the gas concentration lwevel of arterial partial pressure of carbon dioxide and exhaled air flow latter end has very fixed numerical value to close
System, therefore can measure the gas concentration lwevel of expiratory air latter end with gas concentration lwevel instrument, calculate arterial blood two with this
The level of carbonoxide partial pressure has already appeared a small number of such products in the market.But current gas concentration lwevel instrument can only provide
Concentration measurement data can not directly give clinical general carbon dioxide partial pressure index, while the sampling on these products
Device measurement error is larger, not can guarantee the gas sample into measuring point and is the air-flow of exhaled air flow latter end, and then not can guarantee survey
The gas concentration lwevel measured is the gas concentration lwevel of exhaled air flow latter end.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device and being
System, can measure the gas concentration lwevel of expiration latter end, show that carbon dioxide divides after handling by force gas concentration lwevel.
In a first aspect, the utility model embodiment provides a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device, comprising: according to
The expiration latter end gas sampler of secondary connection calculates end and display end；Wherein, expiration latter end gas sampler includes sampling unit
Part, be arranged in sample unit exhaled gas exit export-oriented check valve, and the sensor array being connected with sample unit；
Sample unit is used to acquire the expiration end-tidal gas of patient；Gas pressure of the export-oriented check valve in sample unit reaches pre-
If closure close when requiring so that sample unit saves the expiration end-tidal gas of patient；Sensor array is for measuring sampling
The carbon dioxide concentration value and ambient atmosphere pressure of expiration end-tidal gas in component are also used to carbon dioxide concentration value and outer
Boundary's atmospheric pressure, which is transmitted to, calculates end；Concentration value and ambient atmosphere pressure that end is used to receive carbon dioxide are calculated, is generated and two
Carbonoxide concentration value and the corresponding carbon dioxide partial pressure value of ambient atmosphere pressure, are sent to display end for carbon dioxide partial pressure value；
Display end shows carbon dioxide partial pressure value on interface for receiving carbon dioxide partial pressure value.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, above-mentioned sample unit is sampling mask, and/or, T shape air blowing sampling pipe.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, the sensor array includes carbon dioxide sensor and atmosphere pressure sensor；Wherein, carbon dioxide sensor is for measuring
The carbon dioxide concentration value of expiration end-tidal gas；Atmosphere pressure sensor is for measuring ambient atmosphere pressure.
The possible embodiment of second with reference to first aspect, the utility model embodiment provide the of first aspect
Three kinds of possible embodiments, wherein above-mentioned carbon dioxide sensor is infrared sensor.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, above-mentioned expiration latter end gas sampler further includes the connecting component being set between sample unit and sensor array.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, above-mentioned calculating end further includes being set to the shell calculated outside end, and the through-hole being opened on shell；Through-hole is for drawing
Calculate the data line at end.
The 5th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Six kinds of possible embodiments, wherein rubber washer is embedded on above-mentioned through-hole.
The 5th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Seven kinds of possible embodiments, wherein above-mentioned enclosure interior is additionally provided with power module, for powering to calculate end；Above-mentioned shell
External side is additionally provided with indicator light, and indicator light is connected with power module, is used to indicate the working condition of power module.
The 5th kind of possible embodiment with reference to first aspect, the utility model embodiment provide the of first aspect
Eight kinds of possible embodiments, wherein above-mentioned display end is also used to receive carbon dioxide concentration value and ambient atmosphere pressure, and will
Carbon dioxide concentration value and ambient atmosphere pressure are shown on default auxiliary display interface.
Second aspect, the utility model embodiment provide a kind of partial pressure of carbon dioxide in endexpiratory gas measuring system, including
On the one hand to first aspect the 8th kind of possible described in any item partial pressure of carbon dioxide in endexpiratory gas measuring devices of embodiment,
It further include the associated terminal being connected with partial pressure of carbon dioxide in endexpiratory gas measuring device.
The utility model embodiment bring it is following the utility model has the advantages that
The utility model embodiment provides a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device and system, the device include
Sequentially connected expiration latter end gas sampler calculates end and display end, and expiration latter end gas sampler includes suffering from for acquiring
The acquisition component of the expiration end-tidal gas of person reaches when preset closure requires for the gas pressure inside sample unit and closes
The export-oriented check valve closed and the gas concentration lwevel for measuring the expiration end-tidal gas in sample unit and external atmosphere pressure
Sensor array, and exhaled gas exit, sensor array and the sample unit of sample unit is arranged in export-oriented check valve
It is connected, calculates end for receiving above-mentioned gas concentration lwevel and external atmosphere pressure, what is handled it divides to carbon dioxide
Value, and carbon dioxide partial pressure value is sent to display end, which is shown by display end.The utility model passes through
Export-oriented check valve is set in exhaled gas exit and guarantees that the gas remained in sample unit is the gas of expiration latter end, by passing
The gas concentration lwevel and ambient atmosphere pressure of expiration end-tidal gas in sensor array measurement sample unit are computed end processing
After can be obtained carbon dioxide partial pressure, finally by display end show carbon dioxide partial pressure.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural representation of partial pressure of carbon dioxide in endexpiratory gas measuring device provided by the embodiment of the utility model
Figure；
Fig. 2 is the structural representation of another partial pressure of carbon dioxide in endexpiratory gas measuring device provided by the embodiment of the utility model
Figure；
Fig. 3 is the structural representation of another partial pressure of carbon dioxide in endexpiratory gas measuring device provided by the embodiment of the utility model
Figure；
Fig. 4 is a kind of structural schematic diagram for sampling mask provided by the embodiment of the utility model；
Fig. 5 is a kind of structural schematic diagram of export-oriented check valve provided by the embodiment of the utility model；
Fig. 6 is the structural schematic diagram that a kind of export-oriented check valve provided by the embodiment of the utility model is opened；
Fig. 7 is the structural schematic diagram of another export-oriented check valve provided by the embodiment of the utility model；
Fig. 8 is the structural schematic diagram that another export-oriented check valve provided by the embodiment of the utility model is opened；
Fig. 9 is a kind of structural representation of partial pressure of carbon dioxide in endexpiratory gas measuring system provided by the embodiment of the utility model
Figure.
Icon:
121-T shape air blowing sampling pipe；122- air blowing oral lobe；123- samples mask；124- samples mask front end；125- sampling
Mask bottom；140- extroversion check valve；160- sensor array；230- measuring instrument；231- data line；51- spring；52- spring
Piece；53- venthole；54- spring pedestal；71- shark's lip diaphragm；72- shark's lip diaphragm pedestal；73- shark's lip diaphragm openings.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
Due to expiration latter end gas concentration lwevel, there are intrinsic relationships with arterial partial pressure of carbon dioxide at present, so not having
It, can be by expiration latter end when the place for having professional technique and equipment to support measures arterial partial pressure of carbon dioxide
The concentration of carbon dioxide measures, but there are biggish errors for existing equipment acquisition, it cannot be guaranteed that collected expiratory air
Body is expiration end-tidal gas, and these equipment are only capable of displaying the gas concentration lwevel of exhaled gas, cannot intuitively be shown dynamic
Arteries and veins blood carbon dioxide partial pressure.Based on this, a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device provided by the embodiment of the utility model,
Guarantee that the gas remained in sample unit is the gas of expiration latter end by the way that export-oriented check valve is arranged in exhaled gas exit,
By the gas concentration lwevel and ambient atmosphere pressure of the expiration end-tidal gas in sensor array measurement sample unit, it is computed end
It can be obtained carbon dioxide partial pressure after processing, show carbon dioxide partial pressure, also, shown titanium dioxide finally by display end
Carbon partial pressure is arterial partial pressure of carbon dioxide.
For convenient for understanding the present embodiment, first to a kind of end-tidal dioxy disclosed in the utility model embodiment
Change carbon partial pressure measuring apparatus to describe in detail, a kind of knot of partial pressure of carbon dioxide in endexpiratory gas measuring device shown in Figure 1
Structure schematic diagram, the device include: sequentially connected expiration latter end gas sampler 100, calculate end 200 and display end 300.
Under normal conditions, expiration latter end gas sampler is used to acquire the gas of expiration latter end, and measures the expiration latter end
The gas concentration lwevel of gas.Specifically, expiration latter end gas sampler 100 includes sample unit 120, is arranged in sample unit
The export-oriented check valve 140 in 120 exhaled gas exit, and the sensor array 160 being connected with sample unit 120.
Wherein, sample unit 120 is used to acquire the expiration end-tidal gas of patient.It should be understood that the dioxy of patient's exhalation
Change carbon to be present in the gas of patient's exhalation, so patient to acquiring what patient breathed out by way of sample unit exhaled gas
Carbon dioxide, and then obtain the carbon dioxide of patient expiration's end-tidal gas.
Export-oriented check valve 140 reaches when preset closure requires for the gas pressure in sample unit closes, so that
The gas of sample unit preservation patient expiration's latter end, wherein above-mentioned preset closure requirement can be the gas in sample unit
Pressure is less than or equal to 2 centimeter water column of external atmospheric pressure, i.e., gas pressure is less than or equal to ambient atmosphere in sample unit
When 2 centimeter water column of pressure, export-oriented closed check valve.In view of carbon dioxide partial pressure and the gas concentration lwevel of expiratory air latter end are deposited
In fixed numerical relation, and carbon dioxide is present in the gas of patient's exhalation, so need to acquire is expiration latter end
Air, the air of expiration leading portion is unwanted, therefore export-oriented check valve is arranged at sample port, wherein sample port
Place is aforementioned exhaled gas exit.In expiration leading portion since the gas pressure in sample unit is higher than external atmospheric pressure 2
Centimeter water column, export-oriented check valve outwardly open under the effect of the pressure, and the gas of expiration leading portion passes through export-oriented check valve from sampling
It is flowed into atmosphere in component, with the progress of patient expiration, the gas of patient's exhalation is gradually decreased, the gas in sample unit
Pressure is also gradually reduced, and when reaching expiration latter end, the gas pressure in sample unit is less than or equal to 2 centimetres of external atmospheric pressure
Water column, export-oriented check valve are closed under the effect of the pressure, so that the gas of expiration latter end be made to save in sample unit.Further
, it is contemplated that aspiratory action may occur for patient, and above-mentioned extroversion check valve can also prevent from making ambient atmos because of aspiratory action
It enters in sample unit, guarantees that the expiration end-tidal gas in sample unit is not diluted by ambient atmos.
Carbon dioxide concentration value and the external world of the sensor array 160 for measuring the expiration end-tidal gas in sample unit are big
Air pressure is strong, is also used to for carbon dioxide concentration value and ambient atmosphere pressure being transmitted to calculating end.In view of carbon dioxide partial pressure with
Gas concentration lwevel is related with ambient atmosphere pressure, so sensor array may include that carbon dioxide sensor and atmospheric pressure pass
Sensor, wherein carbon dioxide sensor is connected with sample unit, to measure the carbon dioxide of expiration end-tidal gas in sample unit
Concentration value, atmosphere pressure sensor is for measuring ambient atmosphere pressure, then by the carbon dioxide concentration value measured and ambient atmosphere
Pressure, which is sent to, calculates end, calculates carbon dioxide partial pressure in carbon dioxide concentration value and ambient atmosphere pressure so as to calculate end group
Value.
End 200 is calculated for receiving carbon dioxide concentration value and ambient atmosphere pressure, generate with carbon dioxide concentration value and
The corresponding carbon dioxide partial pressure value of ambient atmosphere pressure, is sent to display end for carbon dioxide partial pressure value.Wherein, end is calculated to receive
To after carbon dioxide concentration value and ambient atmosphere pressure, the product of carbon dioxide concentration value and ambient atmosphere pressure is calculated, is obtained
Partial pressure of carbon dioxide in endexpiratory gas.Further, it is contemplated that permanent between partial pressure of carbon dioxide in endexpiratory gas and arterial partial pressure of carbon dioxide
The constant low 5mmHg of ratio arterial partial pressure of carbon dioxide of fixed physiology difference, i.e. partial pressure of carbon dioxide in endexpiratory gas, so exhaling
Final carbon dioxide partial pressure value, i.e. arterial partial pressure of carbon dioxide can be obtained plus 5mmHg in carbon dioxide partial pressure in gas end.Meter
After calculating end calculating, carbon dioxide partial pressure value is sent to display end.
Display end 300 shows carbon dioxide partial pressure value on interface for receiving carbon dioxide partial pressure value, so as to survey
Amount person can intuitively see carbon dioxide partial pressure value.
The utility model embodiment provides a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device, which includes successively connecting
Expiration latter end gas sampler, calculating end and display end, the expiration latter end gas sampler connect includes for acquiring exhaling for patient
The acquisition component of gas end-tidal gas, reach for the gas pressure inside sample unit closed when preset closure requires it is outer
The gas concentration lwevel of gas to check valve and for measuring the expiration latter end in sample unit and the sensing of external atmosphere pressure
Device array, and the exhaled gas exit of sample unit is arranged in check valve to extroversion, sensor array is connected with sample unit,
End is calculated for receiving above-mentioned gas concentration lwevel and external atmosphere pressure, it is handled to carbon dioxide partial pressure value, and
Carbon dioxide partial pressure value is sent to display end, which is shown by display end.The utility model is by exhaling
Gas outlet is arranged export-oriented check valve and guarantees that the gas remained in sample unit is the gas of expiration latter end out, by sensor
The gas concentration lwevel and ambient atmosphere pressure of expiration end-tidal gas in array measurement sample unit are computed after the processing of end i.e.
It can get carbon dioxide partial pressure, show carbon dioxide partial pressure finally by display end.
Further, above-mentioned sample unit is sampling mask or T shape air blowing sampling pipe.
For ease of understanding, it on the basis of the utility model partial pressure of carbon dioxide in endexpiratory gas measuring device shown in Fig. 1, provides
Another partial pressure of carbon dioxide in endexpiratory gas measuring device, it is shown in Figure 2 by taking sample unit is T shape air blowing sampling pipe as an example
Another structural schematic diagram of partial pressure of carbon dioxide in endexpiratory gas measuring device.
The device mainly includes T shape air blowing sampling pipe 121, export-oriented check valve 140, sensor array 160 and measuring instruments
230, wherein T shape air blowing sampling pipe 121, export-oriented check valve 140 and sensor array 160 form aforementioned expiration end-tidal gas and adopt
Sample device 100, measuring instrument 230 are the aforementioned combination for calculating end 200 and display end 300.It is in 121 front end of T shape air blowing sampling pipe
Air blowing oral lobe 122 is provided with export-oriented check valve 140 at the sample port of rear end, is connected in 121 bottom of T shape air blowing sampling pipe
Sensor array 160, sensor array 160 are connect by data line 231 with measuring instrument 230.
In one embodiment, patient by air blowing oral lobe to T shape air blowing sampling pipe exhaled gas, in early period of exhaling,
Since gas pressure is greater than 2 centimeter water column of external atmospheric pressure in T shape air blowing sampling pipe, so work of the export-oriented check valve in pressure
It is outwardly opened under, the gas of patient's exhalation flows to ambient atmosphere from T shape air blowing sampling pipe by export-oriented check valve, with patient
The reduction of exhaled gas, the pressure of gas gradually decreases in T shape air blowing sampling pipe, the sampling until patient expiration's latter stage T shape is blown
It is export-oriented single due to making at this time without enough active forces when gas pressure drops to 1 to 2 centimeter water column of external atmospheric pressure in managing
It is outwardly opened to valve, leads to export-oriented closed check valve, the gas saved in T shape air blowing sampling pipe at this time is patient expiration's latter end
Gas, sensor array acquire the gas concentration lwevel and ambient atmosphere pressure of gas in T shape air blowing sampling pipe at this time, and will adopt
The gas concentration lwevel and ambient atmosphere pressure collected is sent to measuring instrument, is carried out by the calculating end inside measuring instrument to it
Reason obtains carbon dioxide partial pressure value, and the display end by being arranged on measuring instrument is shown to gauger.
Partial pressure of carbon dioxide in endexpiratory gas measuring device provided by the embodiment of the utility model is blown by air blowing oral lobe to T shape
Gas sampling pipe exhaled gas is stored in exhaled gas in T shape air blowing sampling pipe in expiration latter end extroversion closed check valve, by
Sensor array measures the gas concentration lwevel and ambient atmosphere pressure of exhaled gas, and survey is shown to after measuring instrument is handled
Amount person.The utility model can measure the gas concentration lwevel of expiration latter end, then after handling gas concentration lwevel, can be with
Intuitively carbon dioxide partial pressure is directly displayed to gauger.
In view of there are some patients can not be correctly to T shape air blowing sampling pipe exhaled gas, such as infant or meaning
Know unclear patient, so proposing a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device to sample mask as sample unit, joins
See the structural schematic diagram of another partial pressure of carbon dioxide in endexpiratory gas measuring device shown in Fig. 3.
The device mainly includes sampling mask 123, export-oriented check valve 140, sensor array 160 and measuring instruments 160, wherein
Sample the structure of mask 123 as shown in figure 4, sampling mask 123, export-oriented check valve 140 and sensor array 160 form it is aforementioned
Expiration latter end gas sampler 100, measuring instrument 230 are the aforementioned combination for calculating end 200 and display end 300.In sampling mask
It is provided with export-oriented check valve 140 at the sample port of front end 124, is connected to sensor array 160 in sampling mask bottom 125,
Sensor array 160 is connect by data line 231 with measuring instrument 230.
Because Fig. 3 shown device using crowd primarily directed to can not correctly to T shape air blowing sampling pipe blow patient,
So using the sample unit of face mask structure.When patient is divided using device measurement carbon dioxide, sampling mask is covered on
The face of patient, patient exhale into mask, and with the reduction of patient exhalation air, the pressure for sampling gas in mask gradually subtracts
It is few, until gas pressure drops to 1 to 2 centimeter water column of external atmospheric pressure in patient expiration's latter end sampling mask, due at this time
There is no enough active forces to outwardly open export-oriented check valve, lead to export-oriented closed check valve, sensor array acquisition is adopted at this time
The gas concentration lwevel of gas and ambient atmosphere pressure in sample mask, and by collected gas concentration lwevel and external atmosphere pressure
It is sent to measuring instrument by force, it is handled by the calculating end inside measuring instrument, obtains carbon dioxide partial pressure value, and passes through measurement
The display end being arranged on instrument is shown to gauger.Preferably, the making material for sampling mask can be using the soft of fitting face
Material improves the accuracy of sampling to prevent the ambient atmos in exhalation process from entering in sampling mask.
Partial pressure of carbon dioxide in endexpiratory gas measuring device provided by the embodiment of the utility model, for can not proper use of T shape
The patient of air blowing sampling pipe can also collect the gas concentration lwevel of end of breath, can be straight after measuring instrument is handled
That sees directly displays carbon dioxide partial pressure to gauger.
Preferably, measuring instrument can be hand-held meter, and one hand can be held, easy to carry.Further, in order to mitigate
The volume and weight of expiration latter end gas sampler is stated, the atmosphere pressure sensor in sensor array can be arranged in measuring instrument
In, i.e., the sample unit in expiration latter end gas sampler is only connected with the carbon dioxide sensor in sensor array.
Further, the sensor array may include carbon dioxide sensor and atmosphere pressure sensor.Wherein, dioxy
Change the carbon dioxide concentration value that carbon sensor is used to measure expiration latter end, atmosphere pressure sensor is for measuring ambient atmosphere pressure.
Preferably, carbon dioxide sensor can be NDIR (Non-Dispersive InfraRed, infrared sensor).Infrared ray
Core component of the sensor as carbon dioxide concentration measurement, measurement range are 0~20%, and the reaction time is complete less than 40 seconds
The needs of full up foot exhaled gas carbon dioxide concentration measurement, while atmosphere pressure sensor is configured, real-time measurement external atmosphere pressure
By force, practical foundation is provided for the gas concentration lwevel for latter end of exhaling is converted into carbon dioxide partial pressure.
Further, it is contemplated that the switching problem of T shape air blowing sampling pipe and sampling mask, it can be in sample unit and sensing
One connecting component is set between device array.T shape air blowing sampling pipe is identical with the sampling connecting component structure of mask, convenient for being directed to
Different patients switches different sample units.Preferably, for the ease of the switching of sample unit, by sensor array and sampling
Connection type between component is set as detachable connection type.It is connect specifically, sensor can be designed on sample unit
Mouthful, in the carbon dioxide partial pressure for measuring patient, sensor array can be inserted into the sample unit of selection, it is real by plug
The replacement of existing sample unit, i.e., when replacing sample unit, it is only necessary to extract sensor array from sensor interface, then insert
Enter into the sample unit of another selection.For example, selecting T shape to blow when the carbon dioxide partial pressure to patient A measures
Gas sampling pipe, and sensor array is inserted into the sensor interface of T shape air blowing sampling pipe, to realize the dioxy to patient A
Change the measurement of carbon partial pressure；If next patient B is the patient of unconsciousness, needs for T shape air blowing sampling pipe to be changed to and adopt
Sample mask needs to extract sensor array from the sensor interface of T shape air blowing sampling pipe at this time, and is inserted into sampling mask
Sensor interface in, to realize the measurement to the carbon dioxide of patient B partial pressure.
Understand for the ease of the structure to export-oriented check valve, the utility model embodiment provides a kind of export-oriented unidirectional
Valve, for when partial pressure of carbon dioxide in endexpiratory gas measuring device is not used, a kind of structure of export-oriented check valve shown in Figure 5
Schematic diagram.
The extroversion check valve is spring non-return valve piece, by spring 51, spring leaf 52, venthole 53 and 54 groups of spring pedestal
At.When partial pressure of carbon dioxide in endexpiratory gas measuring device is not used, due to the gas pressure in ambient atmosphere pressure and sample unit
Strong identical, so spring non-return valve piece stress balance, i.e. spring 51 are in uncompressed state, spring leaf 52 covers venthole 53,
Venthole 53 is in closed state.In the early period that patient exhales into sample unit, export-oriented check valve shown in Figure 6 is opened
Structural schematic diagram, since the pressure of sample unit internal gas at this time is higher than 2 centimeter water column of ambient atmosphere pressure, i.e. expiratory air
Body is greater than ambient atmosphere to the active force of spring non-return valve piece to the active force of spring non-return valve piece, so spring 51 is compressed,
Spring leaf 52 is detached from venthole 53, and export-oriented check valve is opened, and the gas in sample unit passes through the venthole of spring non-return valve piece
53 flow to ambient atmosphere from sample unit.In the latter stage that patient exhales into sample unit, due in sample unit at this time
The pressure of portion's gas is lower than 2 centimeter water column of ambient atmosphere pressure, i.e. exhaled gas is less than the active force of spring non-return valve piece outer
Boundary's atmosphere is to the active force of spring non-return valve piece, so spring non-return valve piece restores initial, export-oriented closed check valve, sample unit
Interior gas is stored in sample unit, and ambient atmosphere is prevented to flow in sample unit.
Fig. 7 shows the structural schematic diagram of another export-oriented check valve, which is shark's lip diaphragm check valve, point
For shark's lip diaphragm 71 and shark's lip diaphragm pedestal 72, when partial pressure of carbon dioxide in endexpiratory gas measuring device is not used, due to extraneous big
Air pressure is identical as the gas pressure intensity in sample unit by force, so 71 stress balance of shark's lip diaphragm, shark's lip diaphragm openings 73 are in and close
Conjunction state.In the early period that patient exhales into sample unit, the structure that the export-oriented check valve of another kind shown in Figure 8 is opened is shown
It is intended to, since the pressure of sample unit internal gas at this time is higher than 2 centimeter water column of ambient atmosphere pressure, i.e., exhaled gas is to shark's lip
The active force of diaphragm 71 is greater than ambient atmosphere to the active force of shark's lip diaphragm 71, so shark's lip diaphragm 71 is opened, sample unit
Interior gas flows to ambient atmosphere by shark's lip diaphragm openings 73 from sample unit.It exhales in patient into sample unit
In latter stage, since the pressure of sample unit internal gas at this time is lower than 2 centimeter water column of ambient atmosphere pressure, i.e., exhaled gas is to shark's lip
The active force of diaphragm 71 is less than ambient atmosphere to the active force of shark's lip diaphragm 71, so shark's lip diaphragm 71 restores initially, it is export-oriented single
It is closed to valve, the gas in sample unit is stored in sample unit, and ambient atmosphere is prevented to flow in sample unit.
Partial pressure of carbon dioxide in endexpiratory gas measuring device provided by the embodiment of the utility model is outer by being arranged in sample unit
It realizes to the switch control of export-oriented check valve, guarantees using ambient atmosphere and sample unit internal gas pressure to check valve
Gas in sample unit is the gas of expiration latter end.
It should be noted that export-oriented check valve described in utility model embodiment is not limited to spring non-return valve piece and shark's lip film
Valve, if can when the gas pressure in sample unit is less than external atmospheric pressure the device that close, can be used as practical
The export-oriented check valve of new embodiment.
Shell can be arranged outside end calculating in protection in view of aesthetic problem and to end is calculated.It is passed to connect
Sensor array and calculating end, can open up a through-hole on shell, for drawing the data line for calculating end, further, lead to
Rubber washer is embedded on hole, rubber washer can play the role of reducing control line abrasion.
In addition, power module should be also also set up inside housings in order to end power supply is calculated, so that calculating end can be normal
Work.Further, it is additionally provided with indicator light in hull outside, indicator light is connected with power module, is used to indicate power module
Working condition.In the case where power module electricity is sufficient, indicator light shows green light, prompts gauger's power module at this time
Electricity is sufficient；In the case where power module electricity owes electricity, indicator light shows red light, and prompting gauger, power module needs at this time
Carry out charging operations.
Further, display end is also used to receive the concentration value and ambient atmosphere pressure of the carbon dioxide of expiration latter end, and
The concentration value of the carbon dioxide of end of breath and ambient atmosphere pressure are shown on default auxiliary display interface.Because of titanium dioxide
Carbon partial pressure value is as main measured value, so carbon dioxide partial pressure value is mainly shown in display end, while work is shown on display end
For the carbon dioxide concentration value and ambient atmosphere pressure of instrumental value, carbon dioxide partial pressure value is measured so that gauger is apparent from
When each state value for acquiring.
In conclusion the utility model is remained in sample unit by the way that export-oriented check valve guarantee is arranged at sample port
Gas expiration latter end gas, by sensor array measurement sample unit in gas concentration lwevel and ambient atmosphere pressure,
It can be obtained carbon dioxide partial pressure after being computed end processing, show carbon dioxide partial pressure finally by display end.
The utility model embodiment additionally provides a kind of partial pressure of carbon dioxide in endexpiratory gas measuring system, shown in Figure 9
A kind of structural schematic diagram of partial pressure of carbon dioxide in endexpiratory gas measuring system, the system include the end-tidal two that previous embodiment provides
Carbonoxide partial pressure measuring apparatus 910 further includes the associated terminal 920 being connected with partial pressure of carbon dioxide in endexpiratory gas measuring device 910.
It wherein, can be by titanium dioxide when partial pressure of carbon dioxide in endexpiratory gas measuring device measures carbon dioxide partial pressure value
Carbon partial pressure value is sent to associated terminal through wireless communication, with clearer informing patient or medical staff's titanium dioxide
Carbon partial pressure value.Specifically, the associated terminal can be the intelligent terminals such as the preset computer monitor of medical staff, mobile phone.
In addition, in the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of partial pressure of carbon dioxide in endexpiratory gas measuring device characterized by comprising sequentially connected expiration end-tidal gas is adopted
Sample device calculates end and display end；Wherein,
The expiration latter end gas sampler include sample unit, be arranged in the sample unit exhaled gas exit it is outer
To check valve, and the sensor array being connected with the sample unit；The sample unit is used to acquire the end-tidal of patient
Section gas；The extroversion check valve reaches when preset closure requires for the gas pressure in the sample unit closes,
So that the sample unit saves the expiration end-tidal gas of patient；The sensor array is for measuring in the sample unit
The carbon dioxide concentration value and ambient atmosphere pressure of the expiration end-tidal gas, are also used to the carbon dioxide concentration value and institute
It states ambient atmosphere pressure and is transmitted to the calculating end；
The calculating end generates and the carbon dioxide for receiving the carbon dioxide concentration value and the ambient atmosphere pressure
The carbon dioxide partial pressure value is sent to described aobvious by concentration value and the corresponding carbon dioxide partial pressure value of the ambient atmosphere pressure
Show end；
The display end shows the carbon dioxide partial pressure value on interface for receiving the carbon dioxide partial pressure value.
2. the apparatus according to claim 1, which is characterized in that the sample unit is sampling mask, and/or, T shape is blown
Sampling pipe.
3. the apparatus according to claim 1, which is characterized in that the sensor array includes carbon dioxide sensor and big
Baroceptor；Wherein,
The carbon dioxide sensor is used to measure the carbon dioxide concentration value of the expiration end-tidal gas；
The atmosphere pressure sensor is for measuring the ambient atmosphere pressure.
4. device according to claim 3, which is characterized in that the carbon dioxide sensor is infrared sensor.
5. the apparatus according to claim 1, which is characterized in that the expiration latter end gas sampler further includes being set to institute
State the connecting component between sample unit and the sensor array.
6. the apparatus according to claim 1, which is characterized in that the calculating end further includes being set to outside the calculating end
Shell, and the through-hole being opened on the shell；The through-hole is used to draw the data line for calculating end.
7. device according to claim 6, which is characterized in that be embedded with rubber washer on the through-hole.
8. device according to claim 6, which is characterized in that the enclosure interior is additionally provided with power module, for for
The calculating end power supply；The hull outside is additionally provided with indicator light, and the indicator light is connected with power module, is used to indicate institute
State the working condition of power module.
9. the apparatus according to claim 1, which is characterized in that the display end is also used to receive the gas concentration lwevel
Value and the ambient atmosphere pressure, and the carbon dioxide concentration value and the ambient atmosphere pressure are shown and shown in default auxiliary
Show on interface.
10. a kind of partial pressure of carbon dioxide in endexpiratory gas measuring system, which is characterized in that the system comprises claim 1-9 is any
Partial pressure of carbon dioxide in endexpiratory gas measuring device described in, further includes being connected with the partial pressure of carbon dioxide in endexpiratory gas measuring device
Associated terminal.
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| CN201821730892.0U CN209499730U (en) | 2018-10-24 | 2018-10-24 | Partial pressure of carbon dioxide in endexpiratory gas measuring device and system |
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|---|---|---|---|
| CN201821730892.0U CN209499730U (en) | 2018-10-24 | 2018-10-24 | Partial pressure of carbon dioxide in endexpiratory gas measuring device and system |
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| CN209499730U true CN209499730U (en) | 2019-10-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595609A (en) * | 2020-06-19 | 2020-08-28 | 中国计量科学研究院 | Respiratory rhythm generating device, detection system with same and detection method |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595609A (en) * | 2020-06-19 | 2020-08-28 | 中国计量科学研究院 | Respiratory rhythm generating device, detection system with same and detection method |
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