JP4965404B2 - Breath collection device - Google Patents
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- JP4965404B2 JP4965404B2 JP2007258240A JP2007258240A JP4965404B2 JP 4965404 B2 JP4965404 B2 JP 4965404B2 JP 2007258240 A JP2007258240 A JP 2007258240A JP 2007258240 A JP2007258240 A JP 2007258240A JP 4965404 B2 JP4965404 B2 JP 4965404B2
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- 239000002274 desiccant Substances 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 15
- 238000005259 measurement Methods 0.000 description 8
- 210000000214 mouth Anatomy 0.000 description 6
- 230000000968 intestinal effect Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- GUBGYTABKSRVRQ-XLOQQCSPSA-N Alpha-Lactose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@H](O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-XLOQQCSPSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229930091371 Fructose Natural products 0.000 description 1
- 239000005715 Fructose Substances 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000021258 carbohydrate absorption Nutrition 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001035 gastrointestinal tract Anatomy 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000008101 lactose Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 210000000813 small intestine Anatomy 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
本発明は、呼気採取装置に関するものである。 The present invention relates to a breath collection device.
最近、呼気中に含まれる微量成分を測定することによって、その人間の健康状態や遺伝的特性が分かるようになってきている。例えば、呼気中の水素ガス濃度を測定することによって、腸内細菌叢の作用と基質を利用して、糖質吸収不全（乳糖、蔗糖、果糖等）の診断、口−盲腸（小腸）通過時間の測定、腸内細菌の異常増殖、小腸粘膜障害の診断等に使用できる。 Recently, by measuring the trace components contained in exhaled breath, it has become possible to understand the human health and genetic characteristics. For example, by measuring the concentration of hydrogen gas in exhaled breath, using the action of the intestinal flora and the substrate, diagnosis of carbohydrate absorption deficiency (lactose, sucrose, fructose, etc.), mouth-cecal (small intestine) transit time It can be used for the measurement of gastrointestinal tract, abnormal growth of intestinal bacteria, diagnosis of small intestinal mucosal disorder, and the like.
このような呼気中の微量ガスの測定は、肺胞内の呼気を空気と混ざらないようにして採取しなければその濃度は測定できない。 Such measurement of trace gas in exhalation cannot be measured unless the exhalation in the alveoli is collected so as not to be mixed with air.
しかし、単に口から呼気を容器等に吹き込んでも、その呼気が測定に使用できるものではない。口の中や気道内に存在していた呼気は肺胞内から出たものとは限らない。このように肺胞から出た呼気でない場合、肺胞内で血液と物質交換していないため、上記した測定対象ガスを含まないことになる。よって、このような呼気を測定しても意味はない。また、このような呼気が一部でも混入すれば濃度が変わるためやはり使用できない。 However, even if exhalation is simply blown into a container or the like from the mouth, the exhalation cannot be used for measurement. The exhaled air that was present in the mouth and in the respiratory tract is not necessarily from the alveoli. Thus, when it is not the exhalation which came out of the alveoli, since the substance exchange with the blood is not carried out within the alveoli, the above-mentioned measurement object gas is not included. Therefore, there is no point in measuring such exhalation. In addition, if even part of such exhalation is mixed, the concentration will change and it cannot be used.
このため、このような呼気検査には最後に吐き出される終末呼気とよばれるものを使用するのが好ましい。 For this reason, it is preferable to use what is called the end exhalation exhaled at the end for such an expiration test.
しかしながら、この終末呼気を被測定者自身が考えて呼気容器に吹き込むことは非常に難しい。それは、どの程度肺胞内に呼気が残っているか考えながら、最初は容器に導入せず適当な時期に容器に吹き込むのが難しいためである。これが、病気の高齢者であればほとんど不可能である。 However, it is very difficult for the person to be measured to think about this end-expiration and blow it into the expiration container. This is because it is difficult to blow into the container at an appropriate time without first introducing it into the container while considering how much exhalation remains in the alveoli. This is almost impossible for elderly people with illness.
そこで、高齢者や体の弱った人であっても、確実に終末呼気又は測定に使用できる適当な呼気を採取できる装置を提供する。 Therefore, there is provided an apparatus capable of collecting end expiration or appropriate expiration that can be used for measurement even for an elderly person or a person with weak body.
このような現状に鑑み、本発明者は鋭意研究の結果本発明呼気採取装置を完成したものであり、その特徴とするところは、マウスピースから人間の呼気を吸引ポンプで吸引し、それをコック付き容器に導入する装置であって、
該マウスピースと該吸引ポンプの間に三方分岐部を設け、該三方分岐部の一方をマウスピース側とし、他方を該吸引ポンプ側とし、残りを予備採取口とし、
該三方分岐部の３方すべてに逆止弁を設け、
該三方分岐部と該マウスピースの間に乾燥剤を設け、該三方分岐部と該吸引ポンプとの間にも乾燥剤を設け、
該予備採取口は通常は閉止具で閉止されており、
該吸引ポンプの出側に第１三方電磁弁を設け、その１方に流量計を設け、他方には流量計と該流量計の下流側に第２三方電磁弁を設け、その一方にコック付き容器を取り付け可能に構成された点にある。
In view of such a current situation, the present inventor has completed the exhalation collecting device of the present invention as a result of intensive studies, and the feature thereof is that human exhalation is sucked from the mouthpiece with a suction pump, and then the cock is collected. A device for introducing into the attached container,
A three-way branch is provided between the mouthpiece and the suction pump, one of the three-way branch is the mouthpiece side, the other is the suction pump side, and the rest is a preliminary sampling port,
Provide check valves on all three sides of the three-way branch,
A desiccant is provided between the three-way branch and the mouthpiece, and a desiccant is also provided between the three-way branch and the suction pump.
The preliminary collection port is normally closed with a closing tool,
A first three-way solenoid valve is provided on the outlet side of the suction pump, a flow meter is provided on one side thereof, a flow meter is provided on the other side, a second three-way solenoid valve is provided on the downstream side of the flow meter, and one of them has a cock The point is that the container can be attached.
本出願でいう呼気は、広い意味で使用する。口から出る気体をすべて呼気といい、肺胞から出たものか否かは問わない。 Exhalation as used in this application is used in a broad sense. Any gas that exits the mouth is called exhalation, whether or not it comes from the alveoli.
吸引ポンプとは、呼気を強制的に吸引するポンプであり、その形式は問わない。容量的には小さいものでよく、１〜５リットル／分程度で十分である。
また、コック付き容器は、呼気を導入、密閉、保管できる容器であればどのようなものでもよく、本発明とは直接関係はない。
The suction pump is a pump that forcibly sucks exhaled air, and the type thereof is not limited. The capacity may be small, and about 1 to 5 liters / minute is sufficient.
The container with a cock may be any container that can introduce, seal, and store exhaled breath, and is not directly related to the present invention.
三方分岐部とは、単に呼気の流れを分岐するものであればどのようなものでもよく、Ｔ字状やＹ字状の継手等でよい。
この三方分岐部は、１方がマウスピース側、もう１方が吸引ポンプ側、そして残りが予備採取口側となる。この予備採取口は、被検者の終末呼気だけを採取するのではなく、口腔内の気体（肺胞から出た呼気でないもの）も採取する場合に使用するものである。
この予備採取口は、通常は閉止具（開閉可能な弁、着脱可能な盲フランジ等）で閉止されており使用しない。上記口腔内の気体を採取する場合は、閉止を解除して、そこに採取容器を取り付ければよい。
The three-way branch portion may be any one that simply branches the flow of exhalation, and may be a T-shaped or Y-shaped joint or the like.
In the three-way branch portion, one side is the mouthpiece side, the other side is the suction pump side, and the rest is the preliminary collection port side. This preliminary collection port is used when not only collecting the terminal exhalation of the subject but also collecting gas in the oral cavity (not exhaled from the alveoli).
This preliminary sampling port is normally closed with a closing tool (openable / closable valve, removable blind flange, etc.) and is not used. When the gas in the oral cavity is collected, the closure is released and a collection container is attached thereto.
前記三方分岐部には３方ともに逆止弁を設ける。逆止弁の方向はマウスピースからは三方分岐部へ入る方向、その他は三方分岐部から出る方向にのみ流れる方向である。 The three-way branch is provided with a check valve in all three directions. The direction of the check valve is the direction that enters the three-way branch from the mouthpiece, and the other direction that flows only in the direction that exits the three-way branch.
また、吸引ポンプ側の逆止弁には、流れる方向に少し抵抗を持たせて、一定圧以上掛からないと流れないようにしてもよい。これは、前記した予備採取口かた、口腔内気体等を採取する場合、単に口から吹き込むだけで、先に予備採取口に取り付けた気体採取容器に入り、そこが一杯になり圧が掛かると、吸引ポンプ側に流れるようにするためである。
このとき吸引ポンプはこの予備採取口に取り付けた気体採取容器が一杯になったときに始動する。
Further, the check valve on the suction pump side may have a little resistance in the flowing direction so that the check valve does not flow unless a certain pressure or more is applied. This means that when collecting the gas from the pre-collection port, oral gas, etc., simply blowing from the mouth, entering the gas collection container previously attached to the pre-collection port and filling it up and applying pressure. This is because the air flows to the suction pump side.
At this time, the suction pump is started when the gas collection container attached to the preliminary collection port is full.
該三方分岐部と該マウスピースの間に乾燥剤を設けている。これは呼気には、多量の水蒸気がふくまれているためである。更に、該三方分岐部と吸引ポンプの間にも乾燥剤を設けてもよい。
乾燥剤は、着脱自在な容器に入れて交換容易にすること望ましい。乾燥剤自体はシリカゲルや石灰のような公知のものでよい。
A desiccant is provided between the three-way branch and the mouthpiece. This is because exhaled air contains a large amount of water vapor. Furthermore, you may provide a desiccant also between this three-way branch part and a suction pump.
Desirably, the desiccant is placed in a removable container for easy replacement. The desiccant itself may be a known one such as silica gel or lime.
吸引ポンプの出側には、第１三方電磁弁を設けている。電磁弁にしているのは電機信号によって切り替えるためである。切替は、後述する流量計からの信号によって行なっても、タイマーで決めた時間後に切り替えてもよい。吸引ポンプの吸引能力が分かっているので、廃棄する呼気量を決めれば時間が決まる。 A first three-way solenoid valve is provided on the outlet side of the suction pump. The reason why the solenoid valve is used is that it is switched by an electric signal. The switching may be performed by a signal from a flow meter described later, or may be switched after a time determined by a timer. Since the suction capacity of the suction pump is known, the time is determined by determining the amount of exhaled air to be discarded.
この第１三方弁は、呼気を廃棄するか、採取するかの分岐をするところである。即ち、一定量までは呼気を廃棄し、その後三方弁を切り替えて採取するのである。 The first three-way valve branches off whether to discard or collect exhaled breath. That is, exhalation is discarded up to a certain amount, and then the three-way valve is switched and collected.
この第１三方弁の両方の出側には、流量計を設ける。そして、一方の流量計の出側はそのまま大気開放し、他方では流量計の出側に第２三方電磁弁を取り付けている。この第２三方電磁弁に、コック付き呼気採取容器を固着して導入するようにする。
しかし、呼気採取容器に導入せず、直接測定装置や検知管、測定カラム等に導入してもよい。
A flow meter is provided on both outlet sides of the first three-way valve. The outlet side of one flow meter is opened to the atmosphere as it is, and the second three-way solenoid valve is attached to the outlet side of the flow meter on the other side. A breath collection container with a cock is fixedly introduced into the second three-way solenoid valve.
However, it may be introduced directly into a measuring device, a detection tube, a measuring column, etc. without being introduced into the breath collection container.
この第２三方電磁弁の出側にも乾燥剤を設けてもよい。
また、流量計はどのようなものでもよく、流量が積算できるものであればどのようなものでもよい。
A desiccant may also be provided on the outlet side of the second three-way solenoid valve.
Further, any flow meter may be used, and any flow meter can be used as long as the flow rate can be integrated.
上記したポンプの起動、停止、各電磁弁の切替等のタイムテーブルはコンピューターで制御するのがよい。また、その各種の時間設定はダイヤル等で簡単に調整できるようしてもよい。電磁弁の切替時間等は、ポンプの能力、被検者の肺活量等で調整する。 The time table for starting and stopping the pump and switching the solenoid valves is preferably controlled by a computer. The various time settings may be easily adjusted with a dial or the like. The switching time of the solenoid valve is adjusted by the pump capacity, the vital capacity of the subject, and the like.
また、吸引ポンプと三方分岐部との間に三方弁を設けて、そこにキャリーヤーガス（空気等、被測定ガス濃度が０のものが好適）を導入したり、被測定ガス濃度が既知の標準ガスを導入したりすることもできる。これは、呼気採取容器に導入せず、直接測定装置や検知管、測定カラム等に導入するときのもので、それらのキャリブレーションに便利である。 In addition, a three-way valve is provided between the suction pump and the three-way branch, and a carrier gas (preferably air or the like having a measured gas concentration of 0 is suitable) or a measured gas concentration is known. A standard gas can also be introduced. This is a case where it is introduced directly into a measurement device, a detection tube, a measurement column, etc. without being introduced into the breath collection container, and is convenient for calibration thereof.
本発明呼気採取装置は、呼気成分測定装置を組み込んで、又は合わせて１つの装置としてもよい。 The breath collection device of the present invention may incorporate a breath component measurement device or may be combined into one device.
本発明呼気採取装置には、次のような効果がある。
１ 自動的に一定量の呼気を破棄し、最適な呼気を必要な分量だけ採取することができる。
２ 吸引ポンプがあるため、高齢者や体力のない患者であっても容易に採取できる。
The breath collection device of the present invention has the following effects.
1. A certain amount of exhalation can be automatically discarded, and an optimum amount of exhalation can be collected.
2. Since there is a suction pump, it can be easily collected even for elderly people or patients without physical strength.
以下図面に示す実施例に基づき本発明をより詳細に説明する。 Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings.
図１は、本発明呼気採取装置１の１例を示す概略フロー図である。
三方分岐部２にマウスピース３、口腔内気体採取バッグ４、乾燥剤容器５が接続されている。三方分岐部のすべての接続口に逆止弁６、７、８が設けられている。これらの逆止弁の流れ可能方向は、マウスピース３から三方分岐部に入り、他に２方に出るという方向である。逆止弁７は、少し抵抗があり、口腔内気体採取バッグ４が一杯になった後でなければ通過しないようになっている。
FIG. 1 is a schematic flow diagram showing an example of the breath collection device 1 of the present invention.
A mouthpiece 3, an intraoral gas collection bag 4, and a desiccant container 5 are connected to the three-way branch 2. Check valves 6, 7, and 8 are provided at all connection ports of the three-way branch portion. These check valves are allowed to flow in the direction of entering the three-way branch from the mouthpiece 3 and exiting in the other two directions. The check valve 7 has a little resistance, and does not pass through after the intraoral gas collection bag 4 is full.
また、マウスピース３と逆止弁６との間には乾燥剤容器９が設けられている。乾燥剤容器５、９は、シリカゲルが充填された容器で、簡単に交換できるよう構成されている。
A
乾燥剤容器５の出側は吸引ポンプ１０と接続されている。この吸引ポンプ１０は、コンピューター（図示せず）からの指令により始動、停止する。即ち、一定時間経過後自動的に停止する。
The exit side of the desiccant container 5 is connected to the
吸引ポンプ１０の出側には、第１三方電磁弁１１が設けられている。この第１三方電磁弁１１によって、呼気の中で廃棄するものと採取するものを分けるためのものである。
この第１三方電磁弁１１も前記した吸引ポンプ１０と同様コンピューターからの指令によって切り替わる。
A first three-way solenoid valve 11 is provided on the outlet side of the
The first three-way solenoid valve 11 is also switched by a command from a computer, similar to the
この例では、廃棄する側に流量計１２を設け、廃棄した量が分かるようになっている。その流量計１２に水分が入らないように乾燥剤容器１３が設けられている。
In this example, a flow meter 12 is provided on the discarding side so that the amount discarded can be known. A
第１三方電磁弁１１の他方には乾燥剤容器１４、流量計１５、第２三方電磁弁１６が順に設けられている。最後の第２三方電磁弁１６は第１三方電磁弁１１からこの第２三方電磁弁１６間に滞留した空気を廃棄するためのものである。
On the other side of the first three-way solenoid valve 11, a desiccant container 14, a flow meter 15, and a second three-
そして、第２三方電磁弁１６の１方に検査に必要な呼気を採取するコック付き採取用容器（バッグ等）１７を着脱自在に取り付ける。
Then, a collecting container 17 (such as a bag) with a cock for collecting exhaled breath necessary for the inspection is detachably attached to one side of the second three-
次にこの実施例の作動について説明する。
まず被検者は、普通に息を吸って、少し待ち、そしてマウスピース３から普通に息を吹き込む。そして最初に１息吹き込めば、後はそのままマウスピースを付けたまま機械が止まるまでそのままの状態を保つ。
Next, the operation of this embodiment will be described.
First, the subject inhales normally, waits for a while, and inhales normally through the mouthpiece 3. Then, if you breathe in for the first time, keep the mouthpiece on and keep it in the state until the machine stops.
本装置は、被検者が最初の１息を吐いた後、そのときにスタートボタンを押す。すると、直ちに吸引が始まり、逆止弁７から呼気が吸引される。そして、吸引ポンプ１０から出た呼気は、第１三方電磁弁１１を通過して乾燥剤容器１３から流量計１２を通って大気に放出される。
The device presses the start button after the subject exhales for the first time. Then, suction starts immediately and exhalation is sucked from the check valve 7. And the exhaled air which came out of the
一定時間後（この例では６秒後）にタイマー（コンピューター）からの信号により、第１三方電磁弁１１が切り替わり、呼気が乾燥剤容器１４側に流れる。そして、流量計１５を通り、第２三方電磁弁から大気へ放出される。そして、１秒後、第２三方電磁弁が切り替わり、呼気が採取バッグ１７に導入される。そして２秒後に吸引ポンプ１０が停止する。採取バッグ１７のコックを閉止して、装置から取り外せば完了である。
After a certain time (in this example, 6 seconds), the first three-way solenoid valve 11 is switched by a signal from a timer (computer), and exhaled air flows to the desiccant container 14 side. Then, it passes through the flow meter 15 and is released from the second three-way solenoid valve to the atmosphere. Then, after 1 second, the second three-way solenoid valve is switched, and exhaled air is introduced into the collection bag 17. Then, after 2 seconds, the
１ 呼気採取装置
２ 三方分岐部
３ マウスピース
４ 口腔内気体採取バッグ
５ 乾燥剤容器
６、７、８ 逆止弁
９ 乾燥剤容器
１０ 吸引ポンプ
１１ 第１三方電磁弁
１２ 流量計
１３、１４ 乾燥剤容器
１５ 流量計
１６ 第２三方電磁弁
１７ 呼気採取バッグ
DESCRIPTION OF SYMBOLS 1 Exhalation collection device 2 Three-way branch part 3 Mouthpiece 4 Oral gas collection bag 5 Desiccant container 6, 7, 8
Claims (2)
該マウスピースと該吸引ポンプの間に三方分岐部を設け、該三方分岐部の一方をマウスピース側とし、他方を該吸引ポンプ側とし、残りを予備採取口とし、
該三方分岐部の３方すべてに逆止弁を設け、
該三方分岐部と該マウスピースの間に乾燥剤を設け、該三方分岐部と該吸引ポンプとの間にも乾燥剤を設け、
該予備採取口は通常は閉止具で閉止されており、
該吸引ポンプの出側に第１三方電磁弁を設け、その１方に流量計を設け、他方には流量計と該流量計の下流側に第２三方電磁弁を設け、その一方にコック付き容器を取り付け可能に構成されたことを特徴とする呼気採取装置。 A device for sucking human breath from a mouthpiece with a suction pump and introducing it into a container with a cock,
A three-way branch is provided between the mouthpiece and the suction pump, one of the three-way branch is the mouthpiece side, the other is the suction pump side, and the rest is a preliminary sampling port,
Provide check valves on all three sides of the three-way branch,
A desiccant is provided between the three-way branch and the mouthpiece, and a desiccant is also provided between the three-way branch and the suction pump.
The preliminary collection port is normally closed with a closing tool,
A first three-way solenoid valve is provided on the outlet side of the suction pump, a flow meter is provided on one side thereof, a flow meter is provided on the other side, a second three-way solenoid valve is provided on the downstream side of the flow meter, and one of them has a cock An exhalation collecting device characterized in that a container can be attached.
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| JP2007258240A JP4965404B2 (en) | 2007-10-02 | 2007-10-02 | Breath collection device |
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| JP2007258240A JP4965404B2 (en) | 2007-10-02 | 2007-10-02 | Breath collection device |
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| JP2009085857A JP2009085857A (en) | 2009-04-23 |
| JP4965404B2 true JP4965404B2 (en) | 2012-07-04 |
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| WO2013118098A1 (en) * | 2012-02-09 | 2013-08-15 | Koninklijke Philips N.V. | Gas sampling device and method |
| CN106066270B (en) * | 2016-03-15 | 2019-11-29 | 深圳市先亚生物科技有限公司 | A kind of full-automatic exhalation test device and method |
| JP6782482B2 (en) * | 2016-07-26 | 2020-11-11 | ミナト医科学株式会社 | Gas sampling device for breath gas analysis |
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| JPH08122330A (en) * | 1994-02-28 | 1996-05-17 | Suzuki Motor Corp | Method and apparatus for sampling of expiration |
| JPH10248826A (en) * | 1997-03-07 | 1998-09-22 | Seitai Kagaku Kenkyusho:Kk | Intraexpiratory isotope analyzer |
| JPH1176202A (en) * | 1997-09-10 | 1999-03-23 | Isao Nishi | Stable isotope exhalation gas collecting method, and device to be used for the same |
| US6726637B2 (en) * | 2001-12-06 | 2004-04-27 | Michael Phillips | Breath collection apparatus |
| JP2004077467A (en) * | 2003-06-16 | 2004-03-11 | Mitoreeben Kenkyusho:Kk | Sampling method and device of end expiration |
| JP2005249732A (en) * | 2004-03-08 | 2005-09-15 | Kyoichiro Shibatani | Method and apparatus for sampling/extracting gas in oral cavity |
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