CN218259667U - Expired air sampling air bag - Google Patents

Abstract

The utility model relates to a sampling air pocket of exhaled breath, at least including gas production import, the bag body, two sides infolding of the bag body to compromise line department printing discernment gas production's identification pattern in the side covers. The identification pattern presents a first shape when the gas collection amount of the air bag is insufficient and presents a second shape when the gas collection amount of the air bag is sufficient. In the gas production process, a user can conveniently identify whether the sampling gas quantity is sufficient or not by judging the identification patterns on the gas bag, and the condition that repeated sampling or testing cannot be carried out due to inaccurate judgment is reduced. The utility model discloses a sampling air pocket can be applied to gas analysis fields such as medical diagnosis.

Description

Expired air sampling air bag

Technical Field

The utility model relates to a medical diagnosis field of expiration analysis, concretely relates to sampling air pocket of expired air.

Background

The analysis of the exhaled breath of the human body is used for assisting the diagnosis of some diseases of the human body, which is not the invention of modern science. The auscultation in inspection, smelling, inquiry and cutting of the traditional Chinese medicine is an important means for seeing a disease by breathing air; ancient Greek also has documented that physicians use the smell of exhaled human breath to assist in the diagnosis of certain diseases, such as rotten apple odor and diabetes, fishy odor and liver disease, urinary ammonia odor and kidney disease. With the development of modern medical technology, more and more disease-related markers are found in exhaled breath, and exhaled breath analysis is widely considered to be a safe and convenient disease diagnosis alternative method, and has been widely applied to clinical research and clinical auxiliary diagnosis. Exhaled breath analysis range covers Volatile Organic Compounds (VOCs) in exhaled breath, exhaled Breath Condensate (EBC), particulate matter in exhaled breath, etc. Organic compounds in exhaled breath that have been used in clinical tests include nitric oxide, carbon monoxide, hydrogen, methane, ammonia, hydrogen sulfide, oxygen, and carbon dioxide.

When a human body exhales, the exhaled breath at the beginning stage mainly comes from the upper respiratory tract, about 150mL, and is called "dead space gas" in exhaled breath analysis; the latter exhaled breath is that produced by the lower respiratory tract. Most exhaled breath analyses require the exclusion of air and dead space. For example, the detection of nitric oxide concentration in exhaled gas requires inhaling clean air without nitric oxide, then exhaling at a certain exhalation flow rate, removing dead space gas, and collecting the back-end gas for detection and analysis. As another example of exhaled carbon monoxide detection, the gas being analyzed for detection is alveolar exhaled gas (late expiratory or end-tidal gas), in addition to the calibration of the ambient gas carbon monoxide. "alveolar gas", which comes from deep in the alveoli, exchanges gas with the blood and reaches equilibrium. Alveolar gas is considered to be a unique gas, which has a significant difference from inhaled gas and is the main target sample for exhaled breath used for disease diagnosis.

Breath analyzers are typically designed to include on-line or off-line test functionality, but also have modes that include only off-line testing. The breath analyzer with the online detection function generally comprises a gas buffer chamber used for collecting target gas required by temporary storage analysis and detection, wherein the buffer chamber is a long channel with a small section, the gas is collected first in first out during gas collection, the gas at the last stage of expiration is ensured to be collected, and the structure is adopted in a NIOX VERO expired nitric oxide measuring system of the company Circusia, a CA-2122 type breath analyzer of the company Ci Hewa medical Co., ltd, and a BA200 type breath analyzer of the company Zhejiang Yiliankang medical science and technology Ltd.

However, even in the exhalation analyzer with on-line detection function, because of the requirement of actual detection efficiency or because of the requirement of working scene (such as remote inspection, physical examination), it is often necessary to collect the exhaled breath sample off-line and send it to the detection center for unified detection, so that the exhaled breath sampling air bag is needed to be used for exhaled breath collection.

Breath analyzers require a certain amount of gas sample to meet detection requirements. However, the existing exhaled breath sampling air bag cannot accurately identify whether the gas production amount is enough, and is judged by manual experience, so that inaccurate judgment easily occurs, repeated sampling and efficiency influence are caused, or the condition that the test cannot be performed due to judgment errors and insufficient samples is caused, and the diagnosis of patients is influenced. On the other hand, the existing exhaled air sampling air bag is usually a conventional air bag only comprising one air inlet, dead space air is removed through manual removal or an auxiliary device, the operation is complex, and partial mixed air is easy to exist. Especially for samples that detect alveolar gas, the mixture in the early part of expiration may cause a deviation in the results.

Therefore, the expired gas sampling air bag can conveniently identify whether the gas is sufficient or not and can conveniently collect the target gas of the expired gas, and is particularly important for improving the gas production efficiency and ensuring the detection accuracy.

SUMMERY OF THE UTILITY MODEL

For overcoming the problem and the defect that current expiratory gas sampling air pocket exists, the utility model provides a whether the sufficient of the convenient discernment gas production of section, and can convenient collection expiratory gas sampling air pocket of expiratory gas target gas. The technical scheme is as follows:

an expired air sampling air bag at least comprises an air inlet and a bag body, wherein two side edges of the bag body are folded inwards, and a mark pattern for identifying the air yield is printed at the position of an inner middle line covered by the side edges.

More specifically, two side edges of the bag body can be folded inwards along an inwards folded center line, and at least one identification pattern for identifying the gas collection amount is arranged on the inwards folded center line of one side edge, wherein the identification pattern is in a first shape when the gas collection amount of the air bag is insufficient, and is in a second shape when the gas collection amount of the air bag is sufficient.

Furthermore, each side edge is provided with 2 or more than 2 identification patterns. Preferably, the two identification patterns are respectively arranged at 1/4 and 3/4 of the side edge.

Further, the identification pattern is selected from one or a combination of a hollow or solid circle or ring, a notched circle or ring, a straight line or rectangle perpendicular to the inner compromise line, a number, a character and a scale mark.

The identification pattern for identifying the gas production amount can be an identification pattern which shows that the folding angle of the side edge changes when the gas production amount is insufficient, and the identification pattern comprises, but is not limited to, a hollow or solid circle or ring, a straight line or rectangle perpendicular to an inner middle-off line and the like. Preferably, the identification patterns are distributed by taking the center line of the inward folding of the side edge as an axis, and the specific gravity of the identification patterns distributed up and down on the axis is the same. When the identification pattern is used for checking the gas production, the air bag and the eyes are horizontally placed, and the side edge and the eyes form a 45-degree angle for visual inspection: 1) The original air bag has no air, the side edge is folded inwards, and the identification pattern can not be seen. 2) When the gas production is not enough, the side is the infolding form, and the visible sign pattern dog-ear is examined at 45 degrees, and if the circular sign pattern visual inspection is heart-shaped, the sign pattern of straight line or rectangle is broken line or presss from both sides the horn shape. 3) When the gas collection amount is enough, the inward-folded side edge is ejected out and is approximately vertical, no obvious folding angle exists when the identification pattern is checked at an angle of 45 degrees, for example, the circular identification pattern is basically oval when being checked by naked eyes, and the linear or rectangular identification pattern is basically linear or rectangular.

The identification pattern for identifying the gas production amount can also be an identification pattern which influences the visual effect by utilizing the gas amount and the inward folding and unfolding amplitude of the side edge when the gas amount is insufficient, and the identification pattern comprises but is not limited to numbers, characters, scale marks and the like. Preferably, the identification patterns are distributed by taking the center line of the inward folding of the side edge as an axis, and the specific gravity of the identification patterns distributed up and down on the axis is the same. When the identification pattern is used for checking the gas production, the air bag and the eyes are horizontally placed, and the side edge and the eyes are parallel to each other for visual checking: 1) The original air bag has no air, the side edge is folded inwards, and the identification pattern can not be seen. 2) When the gas production is not enough, the side is the infolding, because contained angle angular relation, can't see the identification pattern clearly: numbers 0, 3, 6, 8, 9 like field font are not easily distinguishable; as well as scale lines, the spacing is unclear; in addition, the pattern of circular notches is not easy to distinguish where the notches are located. 3) When the gas production is enough, the inward-folded side edge is ejected out and is approximately vertical, and the identification pattern is unfolded and clearly distinguished: numbers such as 0, 3, 6, 8, 9 of the field font are clearly distinguishable; as another example, the spacing is clearly visible as scale lines; also like a pattern of circular indentations, it is clearly visible where the indentations are, in total, etc.

In the preferred scheme, when the marking pattern is a round or circular ring with a notch, the notch is positioned at the inner middle-out line; or when the mark pattern selects the scale mark, the central line of the scale mark is positioned at the inner compromise line; or when the number of the marking patterns is 0, 3, 6, 8, 9, circular, rectangular or vertical line, the inner compromise line crosses the center position of the number.

The identification pattern for identifying the gas production amount can be one of the two manners or a combination of the two manners. The identification pattern for identifying the gas production amount can be arranged on one side or two sides of the side edge. Preferably, each side edge has at least two identification patterns distributed at different positions of the side edge so as to judge the overall condition of the air bag for air collection.

The gas collection inlet of the expired gas sampling air bag is arranged at the top end of the bag body and can be in a blowing nozzle form, the expired gas sampling air bag and the bag body are in press fit and sealed, and the processing technology can be hot melting or ultrasonic welding. The inner diameter of the gas production inlet can be set to be 6-15 mm, so that the respirator can be conveniently sucked and directly used for expiration. An inward check valve can be arranged in the gas production inlet channel, the check valve can be designed into a film shape, and a bayonet is arranged at the edge of the film; the gas production inlet channel is internally provided with an annular transverse partition, the inner side of the annular transverse partition is provided with a buckle for installing a check valve, and the check valve is installed on the buckle. The hollow diameter of the annular transverse partition can be set to be 2-8mm, and the hollow diameter should ensure smooth expiration and reliable sealing of the check valve. When the expiration enters, the expiration pressure can push open the one-way valve to inflate the air bag; after expiration, the pressure of the air bag is applied to the one-way valve, so that the one-way valve is tightly attached to the annular transverse partition in the inlet channel, and the air bag is sealed and the collected air sample is prevented from leaking.

The inner channel of the gas production inlet of the expired gas sampling air bag is circular and can be designed into a structure with a large outside and a small inside. During detection, the device can be matched with a special connector with a thimble, an O-ring and a hollow part to be connected to an exhalation analyzer for use: the thimble can open the one-way valve to make the gas in the air bag be pumped out; the O-ring can be tightly attached to the smaller diameter part of the inner channel of the gas production inlet to achieve sealing when the thimble of the special connector jacks up the one-way valve, so that external air cannot enter, and sample gas can be accurately extracted during detection.

The gas collection inlet of the exhaled gas sampling air bag can be provided with a sealing cover. After gas production is finished, covering: on one hand, the sealing of the gas production inlet is further ensured; on the other hand, the gas production inlet channel is protected, and the one-way valve is prevented from being jacked open due to external pressure or misoperation, so that other gases enter or the internal gas sample leaks. The inside buckle column structure that is provided with of sealed lid, the lid is covered the back that targets in place, and its buckle structure and gas production import structure can guarantee its leakproofness through interference fit.

The bag body of the exhaled breath sampling air bag, the material of the contact part of the inner side of the bag body and the gas, should be the material inert to the gas to be measured, and comprises silicification material, teflon, the material of teflon coating, polyvinyl chloride, polyacrylamide, polyvinyl fluoride (such as Tedlar), polyethylene terephthalate (PET), polyethylene (PE) and the like. In order to enhance the stiffness of the bag body and improve the supporting force of the bag body after gas collection, the bag body can be made of composite materials, namely, the inner side of the bag body is made of inert materials (such as PE), and the outer side of the bag body is made of aluminum foil or aluminum foil composite materials.

The utility model also provides a sampling air pocket of expired air, including gas production import, the bag body, gas outlet at least, gas production import and gas outlet set up at opposite both ends, and the bag body is fusiformis, spindle-shaped or oval with gas production import, gas outlet as both ends point. The fusiform shape, the spindle shape or the oval shape can reduce the dead angle in the bag body.

Furthermore, the gas collection inlet and the gas outlet are both provided with sealing covers, so that the gas sample can be stored in a sealing manner after being collected.

Furthermore, two side edges of the bag body with the gas outlet for sampling are folded inwards, and the side edges cover the inner middle broken line to print identification patterns for identifying the gas collection amount.

More specifically, two sides of the bag body can be folded inwards along an inwards folded center line, and at least an identification pattern for identifying the gas collection amount is arranged on the inwards folded center line of one side, wherein the identification pattern presents a first shape when the gas collection amount of the air bag is insufficient and presents a second shape when the gas collection amount of the air bag is sufficient.

When the exhalation sampling bag is used in a direct exhalation sampling mode, the exhalation sampling bag is also provided with a gas outlet, the gas outlet can be arranged in a manner similar to a blowing nozzle, the gas outlet and the bag body are pressed and sealed, and the processing technology can be hot melting or ultrasonic welding. Preferably, the gas outlet is arranged opposite to the gas production inlet, so that the gas in the front section of expiration can be discharged and replaced. The inner diameter of the bottleneck of the gas outlet is not too small, and the too small diameter is not beneficial to discharge the gas at the front section of expiration; the inner diameter of the bottleneck of the gas outlet is not too large, and too large gas can be discharged too fast, so that gas interception and sampling are not facilitated. Therefore, when the inner diameter of the gas inlet is set to 6-15 mm, the inner diameter of the bottleneck of the gas outlet can be set to 2-10 mm. The gas outlet is also provided with a sealing cover, and after gas production is finished, the cover is covered firstly, so that the sealing of the gas outlet is ensured, and external gas is prevented from entering or internal gas samples are prevented from leaking. The inside buckle column structure that is provided with of sealed lid, the lid is covered the back that targets in place, and its buckle structure and gas outlet structure spare can ensure its leakproofness through interference fit.

The bag body of the expired air sampling air bag takes an air inlet and an air outlet as two top ends and is designed into a shuttle shape, a spindle shape or an oval shape, and dead angles in the bag body can be reduced due to the shape, so that the air in the front section of expiration can be smoothly discharged, and the air replacement efficiency is improved.

Therefore, the technical scheme of the utility model, whether can let the convenient discernment sampling tolerance of user sufficient, reduce the inaccurate efficiency problem that leads to repeated sampling of judgement or judge the condition that the error sample is not enough to lead to unable test. In addition, when the direct expiratory sampling scene is used, a user can conveniently acquire the expiratory back section or alveolar gas, and the risk of partial mixed gas caused by dead angles in the air bag is reduced.

Drawings

FIG. 1: the utility model discloses section view of expired gas sampling air pocket example.

FIG. 2a: the utility model discloses the gas production entrance point sketch map of expired gas sampling air pocket example.

FIG. 2b: the utility model discloses the gas outlet end sketch map of expired gas sampling air pocket example.

FIG. 3a: the utility model discloses identification pattern 1 example of expiratory air sampling air pocket side.

FIG. 3b: the utility model discloses 2 examples of identification pattern of expired air sampling air pocket side.

FIG. 4a: the utility model discloses identification pattern 1 recognition example (tolerance is sufficient) of expired air sampling air pocket side.

FIG. 4b: the utility model discloses identification pattern 1 recognition example (tolerance is not enough) of expiratory gas sampling air pocket side.

FIG. 5a: the utility model discloses identification pattern 2 recognition example (tolerance is sufficient) of expired air sampling air pocket side.

FIG. 5b: the utility model discloses 2 discernment examples of identification pattern (tolerance is not enough) of exhaled breath sampling air pocket side.

FIG. 6a: schematic representation of the logo pattern of one side of the exhaled breath sampling air bag of example 1.

FIG. 6b: schematic representation of the identification pattern of one side of the exhaled breath sampling air bag of example 2.

FIG. 7a: the utility model discloses only the example of a logo pattern (tolerance is sufficient) of expired gas sampling air pocket side.

FIG. 7b: the utility model discloses only the example of a logo pattern (tolerance is not enough) of expiratory air sampling air pocket side.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Fig. 1 is a cross-sectional view of an example of an expired air sampling air bag according to the present invention. The sampling air bag 1000 is provided with a gas collecting inlet 100 which is designed into a blowing nozzle shape, the inner channel of the sampling air bag is designed to be wide outside and narrow inside, and the inner diameter of the outer end is about 8mm; an annular transverse partition 101 is arranged in the gas production inlet 100, and the diameter of a hollow 102 of the annular transverse partition is about 3mm; a film-shaped inward check valve 110 is arranged on the inner side of the annular transverse diaphragm 101 and is mounted by a buckle to completely cover the hollow channel of the annular transverse diaphragm 101; the gas production inlet 100 is provided with a corresponding sealing cover 120 which is covered on the gas production inlet 100 by means of a snap fit and an interference fit for sealing and protection. The sampling air bag 1000 is also provided with a gas outlet 300, and for the convenience of processing, the same structure of a gas inlet 100 is adopted, but a one-way valve is not installed; therefore, the gas outlet 300 is also internally provided with an annular transverse partition 301, and the hollow 302 of the annular transverse partition is the gas outlet bottleneck and has the diameter of about 3mm; the gas outlet 300 is also provided with a sealing cap 320. The gas inlet 100 and the gas outlet 300 are arranged at two opposite ends of the bag body, and are sealed on the bag body 200 in a pressure-equalizing manner, and the processing technology can be hot melting or super welding. The bag body 200 is spindle-shaped and basically has no dead corners in the bag; the two sides 210, 220 of the pouch are folded inwards, for example the upper and lower parts 211 and 212 of the sides are folded along an internal compromise line 230, which may not be an additional element actually present, but rather a fold produced later in the sides; the inner side of the bag body is made of PE material, and the outer side of the bag body is made of aluminum plastic material.

Fig. 2a is a schematic view of a gas intake 100 of an exhaled gas sampling air bag according to the present invention, wherein an annular diaphragm 101, an annular diaphragm hollow 102, and a film-like inward check valve 110 are installed on the inner side of the annular diaphragm 101 in the gas intake 100, and fig. 2b is a schematic view of a gas outlet 300 of an exhaled gas sampling air bag according to the present invention, wherein the gas outlet 300 is provided with an annular diaphragm 301 and an annular diaphragm hollow 302.

For the scene that the gas production device is matched with sampling, and the gas production device has the function of directional gas production, the gas bag is not provided with the gas outlet 300.

Fig. 3a is the identification pattern example picture is judged to the gas production volume of the utility model discloses expired gas sampling air pocket side, this series of identification patterns is the identification pattern that utilizes the tolerance sufficient to present the change of side infolding angle when insufficient, as shown in the figure, identification pattern example has circle 401, and interior middle-off line vertically straight line 402, rectangle 403, these identification patterns all use middle-off line 230 in the side to distribute as the axle, in the preferred example, identification pattern is the same at the overhead proportion of distribution of axle, just three identification pattern divide establish with the central point of side to and side 1/4, 3/4 department. When this series of identification pattern carries out the gas production volume inspection, air pocket and eye are the level and place, and the side becomes 45 degrees angles with eyes and carries out the visual inspection: 1) When the gas production is enough (as shown in fig. 4 a), the side edge of the inward fold is ejected out and is approximately vertical, no significant folding angle exists when the identification pattern is checked at an angle of 45 degrees, for example, the circular identification pattern is basically elliptical or approximately circular in side view, and the linear or rectangular identification pattern is basically linear or rectangular in side view; 2) When the gas production is not enough (as shown in fig. 4 b), the side edge is the infolding form, 45 degree angle inspection visible identification pattern dog-ear, looks sideways at the inspection and is heart-shaped like circular identification pattern naked eye, and the straight line or the rectangular identification pattern looks sideways at the inspection and is broken line or clip angle shape.

Fig. 3b is another series of air sampling volume judgment marking pattern illustration on the side of the exhaled breath sampling air bag of the present invention, is a marking pattern that the visible effect is affected by the folding and unfolding amplitude of the side when the air volume is sufficient and insufficient, as shown in the figure, the marking pattern illustration has the number 8 (reference numeral 404) of the field font, the circle 405 with the notch, and the scale mark 406, these marking patterns all use the middle line 230 in the side as the axis distribution, the specific gravity that the marking pattern distributes up and down on the axis is the same, for example, the inside horizontal line of the number 8 is located the inner middle line, the notch 4051 of the circle is located the inner middle line, the scale mark includes 7 horizontal lines, wherein the 4 th horizontal line 4061 is located the inner middle line. When this series of identification pattern carries out the gas production and examines, air pocket and eye level are placed, and side and the parallel angle eye examination of eyes: 1) When the gas production is enough (as shown in fig. 5 a), the inward-folded side is ejected out and is approximately vertical, and the identification pattern is unfolded and clearly distinguished: the number 8 as a field font can be clearly distinguished, i.e. the internal transverse line originally compressed on the medial line of the fold is clearly visible, revealing the complete number 8; the distances among the scale marks are clearly visible, and a plurality of scale marks can be clearly distinguished, in the example that the scale marks comprise 7 transverse lines, the distances among the 7 transverse lines are clearly visible, wherein the width of the 4 th transverse line is equal to the width of other transverse lines; the pattern of circular notches, where the notches are, in total, is clearly visible, in this case the circular pattern has two notches apparent at the fold-in midline 230. 2) When the gas production is not enough (as shown in fig. 5 b), the side edge is folded inwards, and the identification pattern cannot be seen clearly because of the angle relation of the included angle: the internal transverse line of the number 8 is compressed at the middle line of the inflectional line due to the inward inflectional of the side edge, so that the internal transverse line of the number 8 is not easy to be distinguished from the inner middle line, and the number 8 of the field font is not easy to be distinguished from 0; the distance between the scale marks is unclear, and a plurality of scale marks cannot be distinguished, for example, the 4 th scale mark is compressed at the center line of the inward-folded line due to inward folding of the side edge, and the 4 th scale mark is easily confused with the middle line of the inward-folded line, so that only six scale marks can be clearly counted; the pattern of circular notches makes it difficult to distinguish where the notches are, and in total, in this example, the notches located on the inner middle broken line are still compressed on the inner middle broken line due to the inward folding of the side edges because the air bag cannot be fully unfolded, so that the side edges are circular without notches.

Fig. 7a and 7b are examples of the exhaled breath sampling air bag of the present invention in which only one air yield determination marking pattern is provided on the side surface. The graduation marks in this example comprise 7 transverse lines, of which the 4 th transverse line lies on the inner compromise line. When this series of identification pattern carries out the gas production and examines, air pocket and eye level are placed, and side and the parallel angle eye examination of eyes: 1) When the gas production is enough (as shown in fig. 7 a), the inward-folded side is ejected out and is approximately vertical, and the identification pattern is unfolded and clearly distinguished: clearly, the 7 lines are spaced at a clear distance, with the width of the 4 th line being as wide as the other lines. 2) When the gas production is insufficient (as shown in fig. 7 b), the side edge is folded inwards, the 4 th scale mark is compressed at the middle line of the folded inwards due to the inward folding of the side edge, and the 4 th scale mark is easily mixed with the middle line of the folded inwards, so that only six scale marks can be counted. When only one identification pattern is adopted on one side of the exhaled air sampling air bag, the identification pattern can be arranged in the middle of the side or at one end close to the gas production inlet 100 according to the gas production requirement.

Example 1

The exhaled breath sampling air bag is manufactured according to the style shown in fig. 1 and the above description, the maximum capacity of the sampling air bag manufactured in this embodiment is about 290mL, and circular patterns are printed at two sides 1/4 and 3/4 respectively, that is, 4 identification pattern points (referred to as dots for short) are totally printed, and the schematic diagram of a single side is shown in fig. 6 a.

And (3) using a series of air bags to collect the expired air, and covering a cover of the gas outlet and then covering a cover of the gas collection inlet after the collection is finished. Identifying the identification pattern according to the air quantity, judging the inflation condition of each identification pattern point (4 points in total) of the air bag according to the above-mentioned mode, and recording; then the cover of the gas production inlet of the air bag is opened, and a 500mL syringe silicone tube is matched with a special connector to pump the quantity of gas collected by each air bag. And (3) totally collecting 25 parts of gas, carrying out visual inspection on whether the gas is sufficient or not by using the side edge of the gas bag and the angle of 45 degrees between the eyes, judging that the gas is not sufficient if the identification pattern is in an oval shape or approximate round shape under the side view condition, and judging that the gas is not sufficient if the identification pattern is in a heart shape, wherein the result is as follows.

Example 2

The exhaled breath sampling airbag is manufactured according to the style shown in fig. 1 and the above description, the maximum capacity of the sampling airbag manufactured in this embodiment is about 290mL, and the field number 8 patterns are printed on the two sides 1/4 and 3/4 respectively, i.e. there are 4 identification pattern points in total, and the schematic diagram of a single side is shown in fig. 6 b.

And (3) using a series of air bags to collect the expired air, and covering a cover of the gas outlet after the collection is finished, and then covering a cover of the gas collection inlet. Identifying the identification pattern according to the air quantity, judging the inflation condition of each identification pattern point (total 4 points) of the air bag according to the above-mentioned mode, and recording; then a cover of a gas production inlet of the air bag is opened, and a 500mL syringe silicone tube is matched with a special joint to pump the gas quantity collected by each air bag. And (3) totally collecting 25 parts of gas, wherein the number 8 is complete and clear, sufficient gas is judged, the number 8 is not clear or cannot be obviously distinguished from the number 0, and the gas is judged to be insufficient, and the results are as follows.

For example, 150mL of gas sample is required for offline detection by using BA200 type breath analyzer manufactured by Yiliankang medical science and technology Limited in Zhejiang. As can be seen from the cases of example 1 and example 2, when the air bag is used, the gas collection amount is much larger than 150mL when the identification pattern shows that "3 points are sufficient, 1 point is insufficient" or "4 points are sufficient", and more margin is left than in other cases; indicating that the gas production is sufficient when the identification pattern is both of these cases.

Test example

A BA200 type exhalation analyzer manufactured by Yiliankang Zhejiang medical science and technology Limited is used for comparing the concentration of carbon monoxide (CO) at the end of expiration. The BA200 type exhalation analyzer can be used for online testing, and a gas buffer chamber is arranged in the analyzer to ensure that an exhaled breath sample at the end of exhalation is collected for detection; the BA200 breath analyzer can also be used for off-line detection of a collected gas sample from an external gas bag. Each tested volunteer uses the expired gas sampling air bag in the embodiment 1 to collect expired gas, the CO concentration is detected off-line on a BA200 type expired gas analyzer, each person collects 3 bags of gas, and off-line measurement is carried out for 3 times; then, the test volunteers performed an on-line detection of the end-tidal CO concentration using a model BA200 breath analyzer, and tested 3 times. The exhaled air off-line acquisition test and the online test method are as follows:

and (3) exhaled air off-line acquisition testing: the expired air sampling air bag of example 1, the covers of the gas production inlet and the gas outlet were removed; deeply sucking a breath and holding the breath for 15 seconds; then sucking the gas production inlet mouthpiece to ensure sealing, and exhaling until the gas in the lung is exhausted; and then a cover for the gas outlet is covered. A special joint is arranged on the BA200 type exhalation analyzer and is connected with a gas production inlet of the air bag to ensure that the exhalation analyzer is arranged in place; and clicking an analyzer interface to perform off-line CO detection and giving a result.

And (3) online testing: an expiratory handle or a disposable mouthpiece is arranged on the BA200 type expiratory analyzer; clicking an analysis interface to perform online CO detection; deeply sucking breath and holding breath for 15 seconds; then sucking the mouthpiece to ensure sealing, and exhaling until the air in the lung is exhausted; the instrument automatically detects and gives the result.

A total of 5 volunteers were tested and the results are given below.

It is thus clear that the BA200 type exhalation analyzer who uses the production of yi liankang medical science and technology limited in zhejiang carries out the last CO of exhaling on line and measures with the result difference that the use of the expired gas sampling air pocket of embodiment 1 collection expired last gas sample, then carried out the off-line CO test at BA200 type exhalation analyzer is not big, the utility model discloses an expired gas sampling air pocket can effectively gather the last gas sample of exhaling of human expired gas.

The above examples are only intended to illustrate some preferred embodiments of the present invention, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the protection scope of the present invention.

Claims (12)

1. The expired air sampling air bag at least comprises an air inlet and a bag body, and is characterized in that two side edges of the bag body can be folded inwards along an inwards folded center line, and an identification pattern for identifying the air collection amount is arranged at the position of the inwards folded center line of at least one side edge, wherein the identification pattern is in a first shape when the air collection amount of the air bag is insufficient, and is in a second shape when the air collection amount of the air bag is sufficient.

2. An exhaled breath sampling air bag according to claim 1, wherein 2 or more than 2 identification patterns are provided per side.

3. The exhaled breath sampling air bag of claim 2, wherein the two identification patterns are provided at 1/4 and 3/4 of the side edges.

4. An exhaled breath sampling air bag according to claim 1, wherein the identification pattern is selected from one or a combination of hollow or solid circles or rings, notched circles or rings, straight or rectangular lines perpendicular to the inner compromise line, numbers, text, graduation marks.

5. An exhaled breath sampling air bag according to claim 4, wherein said identification pattern is one or a combination of a hollow or solid circle or ring, and a straight line or rectangle perpendicular to the inner middle-line, and exhibits a side folding angle change when sufficient air is used and insufficient air is used.

6. The exhaled breath sampling air bag of claim 4, wherein the identification pattern is a visual identification pattern affected by the sufficient amount of air and the inward folding and unfolding amplitude of the side edges in case of insufficiency, and the identification pattern is selected from one or a combination of numbers, characters, scale marks, or a circle or a ring with a notch.

7. An exhaled breath sampling air bag according to any one of claims 1 to 6, wherein said identification patterns are arranged around the medial fold lines of the side edges as the axis, and the specific gravity of the identification patterns arranged above and below the axis is the same.

8. The exhaled breath sampling air bag of claim 7, wherein when the logo is a circular or ring with a notch, the notch is located at the inner compromise line; or when the mark pattern selects the scale mark, the central line of the scale mark is positioned at the inner compromise line; or when the number of the marking patterns is 0, 3, 6, 8, 9, circular, rectangular or vertical line, the inner compromise line crosses the center position of the number.

9. The exhaled breath sampling air bag of claim 1, wherein the bag body has a fusiform, spindle-shaped, or oval shape.

10. The exhaled breath sampling airbag of claim 1, wherein an inward check valve is provided in the gas production inlet: when in gas collection, the expiratory pressure opens the one-way valve to inflate the bag body; after gas production is finished, the gas pressure in the bag body enables the one-way valve to be closed to avoid gas sample in the bag from leaking.

11. The exhaled breath sampling airbag of claim 1, further comprising a gas outlet.

12. An exhaled breath sampling air bag according to claim 11, wherein the gas production inlet and the gas outlet are provided with sealing caps.

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