JPH0847534A - Gaseous no inhalator - Google Patents

Gaseous no inhalator

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Publication number
JPH0847534A
JPH0847534A JP18483294A JP18483294A JPH0847534A JP H0847534 A JPH0847534 A JP H0847534A JP 18483294 A JP18483294 A JP 18483294A JP 18483294 A JP18483294 A JP 18483294A JP H0847534 A JPH0847534 A JP H0847534A
Authority
JP
Japan
Prior art keywords
gas
concentration
flow rate
circuit
patient
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18483294A
Other languages
Japanese (ja)
Inventor
Naoki Yahagi
作 直 樹 矢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP18483294A priority Critical patent/JPH0847534A/en
Publication of JPH0847534A publication Critical patent/JPH0847534A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To provide an NO inhalator which is capable of suppressing generation of harmful NO2, correctly managing concn. of NO and independently regulating the concn. of the NO and the concn. of oxygen and does not allow the gaseous No to leak with simple constitution. CONSTITUTION:An inhalation circuit 2 and an exhalation circuit 3 are connected via a three-way branch pipe 5 to an intra-trachea tube 4 mounted at a patient. A gaseous NO supplying pipe 10 for supplying the gaseous NO of the prescribed concn. is connected to a connecting part of the inhalation circuit 2 and the branch pipe 5 or near this part. A respiratory gas flow meter 7 for measuring the flow rate of the inhalating air or exhalating air is interposed in the inhalation circuit 2 or the exhalation circuit 3. A flow rate regulating valve 12 for supplying the gaseous NO at the supply flow rate determined by the flow rate measured by the respiratory gas flow meter 7, the concn. of the gaseous NO to be mixed with the inhalating air and the concn. of the NO to be dosed to a patient is interposed in the gaseous NO supplying pipe 10.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、人工呼吸装置等から供
給される空気に所要濃度のNOガスを混合して患者に投
与するためのNO吸入装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a NO inhaler for mixing air supplied from an artificial respiration device with a required concentration of NO gas and administering it to a patient.

【0002】[0002]

【従来の技術】一酸化窒素NOは肺血管を拡張させる作
用があるため、近年では、新生児持続性肺高血圧症,続
発性肺高血圧症,肺高血圧クリーゼ等の疾病に対して、
所要濃度のNOガスを吸入させる治療が行なわれてい
る。図2はこのような従来のNO吸入装置を示すフロー
シートであって、レスピレータ31に接続された吸気回
路32及び呼気回路33が、患者の呼吸器系に装着され
た気管内チューブ34に対して三方分岐管35を介して
接続されている。
2. Description of the Related Art Since nitric oxide NO has an action of expanding pulmonary blood vessels, in recent years, it has been effective in treating diseases such as neonatal persistent pulmonary hypertension, secondary pulmonary hypertension, and pulmonary hypertension crisis.
A treatment for inhaling a required concentration of NO gas is performed. FIG. 2 is a flow sheet showing such a conventional NO inhaler, in which an inspiratory circuit 32 and an expiratory circuit 33 connected to a respirator 31 are attached to an endotracheal tube 34 attached to a patient's respiratory system. They are connected via a three-way branch pipe 35.

【0003】そして、レスピレータ31に吸気を供給す
る吸気供給管36には、二つのガス混合器37及び38
が介装されており、第一のガス混合器37で、NOタン
ク39から送給される400ppmのNOガスと、空気供給源
40から供給される空気が所定の割合で混合され、第二
のガス混合器38で、前記第一のガス混合器37から供
給される混合ガスと、酸素供給源41から供給される酸
素が所定の割合で混合されて、その混合ガスが前記吸気
回路32を介して患者に供給されるように成されてい
る。
An intake air supply pipe 36 for supplying intake air to the respirator 31 has two gas mixers 37 and 38.
In the first gas mixer 37, 400 ppm NO gas sent from the NO tank 39 and air supplied from the air supply source 40 are mixed at a predetermined ratio, and the second gas mixer 37 In the gas mixer 38, the mixed gas supplied from the first gas mixer 37 and the oxygen supplied from the oxygen supply source 41 are mixed at a predetermined ratio, and the mixed gas passes through the intake circuit 32. It is designed to be supplied to patients.

【0004】このような従来のNO吸入装置を用いて、
例えば患者に10ppm のNOを吸入させようとする場
合、第一のガス混合器37で空気とNOを7:1の割合
で混合すると、その混合ガス中のNO濃度は50ppm と
なる。次いで、第二のガス混合器38で酸素と混合ガス
をさらに4:1の割合で混合すれば、NO濃度が10pp
m ,酸素濃度が83.5%の吸気ガスが得られ、この吸気ガ
スがレスピレータ31から吸気回路32及びこれに介装
された加湿器42内を通って患者に供給される。
Using such a conventional NO inhaler,
For example, when trying to inhale 10 ppm NO in a patient, if the first gas mixer 37 mixes air and NO at a ratio of 7: 1, the NO concentration in the mixed gas becomes 50 ppm. Then, the second gas mixer 38 further mixes oxygen and the mixed gas at a ratio of 4: 1 to obtain a NO concentration of 10 pp.
Inspiratory gas having m 3 and oxygen concentration of 83.5% is obtained, and the inspiratory gas is supplied from the respirator 31 to the patient through the inspiratory circuit 32 and the humidifier 42 interposed therein.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、NOタ
ンク39から送給されたNOガスが、第一ガス混合器3
7で空気と混合されてから、吸気供給管36−レスピレ
ータ31−吸気回路32を通って患者に供給されるまで
に数メートルもの管路内を流れている間、NOは酸素と
化合してNO2 (二酸化窒素)が生成されてしまうの
で、計算上は各ガス混合器37及び38における各ガス
の混合割合に基づいてNOの濃度を決定することができ
ても、実際には正確な濃度管理を行なうことができず、
しかも、NO 2 は生体にとって猛毒であるため、治療に
際し危険を伴うという問題があった。
However, the NO
The NO gas sent from the tank 39 is the first gas mixer 3
After being mixed with air in 7, the intake supply pipe 36-respirator
Data 31-until delivered to the patient through inspiration circuit 32
NO flows with oxygen while flowing in the pipeline for several meters.
NO in combination2(Nitrogen dioxide) is generated
In calculation, each gas in each gas mixer 37 and 38
The concentration of NO can be determined based on the mixing ratio of
However, in reality, it is not possible to perform accurate concentration control,
Moreover, NO 2Is extremely toxic to the living body
There was a problem that it was dangerous.

【0006】また、患者の容体に応じてNO濃度や酸素
濃度を変更する必要が生じた場合に、従来のNO吸入装
置では最終的に第二のガス混合器における混合割合を変
えることによりNO濃度の調整を行なうので、これに伴
って酸素濃度も大幅に変化することとなる。したがっ
て、NO濃度と酸素濃度を独立して調整することができ
ず、酸素濃度を一定に維持してNO濃度を変化させた
り、これとは逆に、NO濃度を一定に維持して酸素濃度
を変化させたりすることが不可能であるというという問
題があった。
Further, when it becomes necessary to change the NO concentration or the oxygen concentration according to the patient's condition, the conventional NO inhaler finally changes the mixing ratio in the second gas mixer to change the NO concentration. Is adjusted, the oxygen concentration also changes significantly accordingly. Therefore, the NO concentration and the oxygen concentration cannot be adjusted independently, and the NO concentration can be maintained constant to change the NO concentration, or conversely, the NO concentration can be maintained constant to control the oxygen concentration. There was a problem that it was impossible to change it.

【0007】さらに、通常のガス混合器37,38は、
混合すべき二種類のガスの供給圧に圧力差がある場合、
両者を一定にするために高圧側のガスを外部へ排出する
構成となっているので、環境基準(3〜5ppm )を超え
る高濃度のNOガスが外部に漏れてしまい、この場合、
患者やその周囲にいる医師,看護婦の粘膜に刺激症状う
起こすおそれがある。そこで本発明は、簡単な構成で、
有害なNO2 の発生を抑え、NOの濃度管理を正確に行
なうことができるだけでなく、NO濃度と酸素濃度を独
立して調整することができ、さらに、NOがガス漏れを
起こさないようにすることを技術的課題としている。
Further, the conventional gas mixers 37 and 38 are
If there is a pressure difference between the supply pressures of the two gases to be mixed,
Since the high pressure side gas is discharged to the outside in order to keep both constants, high concentration NO gas exceeding the environmental standard (3 to 5 ppm) leaks to the outside, and in this case,
May cause irritation to the mucous membranes of patients and their surrounding doctors and nurses. Therefore, the present invention has a simple structure,
Not only can harmful NO 2 be suppressed and NO concentration can be accurately controlled, but NO concentration and oxygen concentration can be adjusted independently, and NO can be prevented from causing gas leakage. This is a technical issue.

【0008】[0008]

【課題を解決するための手段】この課題を解決するため
に、本発明は、所定酸素濃度の吸気を患者に送給する吸
気回路及び患者から吐き出される呼気を排出する呼気回
路が、患者に装着される気管内チューブに対して三方分
岐管を介して接続され、前記吸気中にNOガスを混合し
て患者に吸入させるNO吸入装置であって、前記吸気回
路と前記分岐管の連結部もしくはその近傍に、所定濃度
のNOガスを供給するNOガス供給管が接続され、前記
吸気回路又は呼気回路には吸気又は呼気の流量を計測す
る呼吸ガス流量計が介装され、前記NOガス供給管に
は、前記呼吸ガス流量計により計測された吸気又は呼気
の流量,吸気に混合されるNOガスのNO濃度及び患者
に投与すべきNO濃度に基づいて決定された供給流量で
NOガスを供給する流量調整バルブが介装されたことを
特徴とする。
In order to solve this problem, the present invention provides a patient with an inspiratory circuit for delivering inspiratory air having a predetermined oxygen concentration to the patient and an expiratory circuit for expiring exhaled gas from the patient. A NO inhaler connected to the endotracheal tube via a three-way branch pipe to mix NO gas into the inspiratory air and inhale it to a patient. An NO gas supply pipe for supplying NO gas of a predetermined concentration is connected in the vicinity, and a respiratory gas flow meter for measuring the flow rate of inhalation or exhalation is provided in the intake circuit or the expiratory circuit, and is connected to the NO gas supply pipe. Supplies NO gas at a supply flow rate determined based on the flow rate of inhalation or expiration measured by the respiratory gas flow meter, the NO concentration of NO gas mixed with the inspiration, and the NO concentration to be administered to the patient. Wherein the amount adjusting valve is interposed.

【0009】[0009]

【作用】本発明によれば、吸気回路から供給される所定
酸素濃度の吸気が、三方分岐管を介して気管内チューブ
に供給され、患者から吐き出された呼気は前記三方分岐
管から呼気回路を介して排出される。そして、吸気回路
と前記分岐管の連結部若しくはその近傍に所定濃度のN
Oガスを供給するNOガス供給管が接続されており、N
Oガスが空気と混合されてから患者に至るまでの管路が
極めて短くNO2 が生成される前に短時間で患者に供給
されるので、NO2 の生成が抑えられる。
According to the present invention, inhalation of a predetermined oxygen concentration supplied from the inhalation circuit is supplied to the endotracheal tube through the three-way branch pipe, and exhaled breath exhaled from the patient passes through the exhalation circuit from the three-way branch pipe. Exhausted through. Then, at a connection portion between the intake circuit and the branch pipe or in the vicinity thereof, N of a predetermined concentration is formed.
An NO gas supply pipe for supplying O gas is connected, and N
Generation of NO 2 is suppressed because the conduit from the O gas mixture with air to the patient is very short and is supplied to the patient in a short time before NO 2 is generated.

【0010】そして、例えば、吸気回路(又は呼気回
路)に介装された呼吸ガス流量計により、計測された吸
気(又は呼気)の流量が毎分10リットル,吸気に混合
するNOガスのNO濃度が400ppm,患者に投与すべきN
O濃度が10ppm である場合に、NOガス供給管に介装
された流量調整バルブによりNOガスの供給流量を毎分
約256cc にすれば、NO濃度が10ppm の吸気ガスが得
られる。
Then, for example, the flow rate of the inspiratory (or expiratory) measured by a respiratory gas flow meter interposed in the inspiratory circuit (or expiratory circuit) is 10 liters per minute, and the NO concentration of NO gas mixed with the inspiratory gas. Is 400ppm, N should be administered to patients
When the O concentration is 10 ppm, the intake gas having the NO concentration of 10 ppm can be obtained by setting the NO gas supply flow rate to about 256 cc / min by the flow rate adjusting valve provided in the NO gas supply pipe.

【0011】このとき、NOガスの供給流量(毎分 0.2
56リットル)は、吸気回路から供給される吸気の流量
(毎分10リットル)に比して極めて少ないので、全体
の組成はほとんど変化することがなく、したがって、吸
気の酸素濃度を殆ど一定に維持したままNO濃度を調整
でき、ひいては吸気の酸素濃度を調整してもこれに伴っ
て吸気のNO濃度が変化することがない。さらに、NO
ガスを混合する際にガス混合器を使用しないので、NO
ガスが大気中に漏れだすこともない。
At this time, the supply flow rate of NO gas (0.2 per minute)
56 liters) is extremely small compared to the flow rate of intake air supplied from the intake circuit (10 liters per minute), so the overall composition hardly changes, and therefore the oxygen concentration of the intake air is kept almost constant. The NO concentration can be adjusted as it is, and even if the oxygen concentration of the intake air is adjusted, the NO concentration of the intake air does not change accordingly. Furthermore, NO
No NO gas mixer is used when mixing the gases, so NO
No gas leaks into the atmosphere.

【0012】[0012]

【実施例】以下、本発明を図面に示す実施例に基づいて
具体的に説明する。図1は本発明に係るNO吸入装置を
示すフローシートである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments shown in the drawings. FIG. 1 is a flow sheet showing an NO inhaler according to the present invention.

【0013】本例のNO吸入装置は、レスピレータ1に
接続された吸気回路2及び呼気回路3が、患者の呼吸器
系に装着された気管内チューブ4に対して三方分岐管5
を介して接続されて成る。レスピレータ1には、100 %
酸素と空気とを所定の割合で混合して前記吸気回路2に
送給するO2 ブレンダ6が接続されると共に、吸気回路
2に介装されて吸気の流量を計測する呼吸ガス流量計7
が配設されている。
In the NO inhaler of this example, the inspiratory circuit 2 and the expiratory circuit 3 connected to the respirator 1 are divided into a three-way branch pipe 5 and an endotracheal tube 4 attached to the respiratory system of the patient.
It is connected via. 100% for respirator 1
An O 2 blender 6 that mixes oxygen and air at a predetermined ratio and sends the mixture to the intake circuit 2 is connected, and a respiratory gas flow meter 7 that is interposed in the intake circuit 2 and measures the flow rate of intake air.
Is provided.

【0014】吸気回路2と三方分岐管5はTピースコネ
クタ8を介して連結され、当該コネクタ8にはNOタン
ク9から送給される所定濃度のNOガスを供給するNO
ガス供給管10が接続されている。なお、NOタンク9
には、例えば400ppmのNOガスが窒素ガス中に含有され
た状態で充填されている。
The intake circuit 2 and the three-way branch pipe 5 are connected via a T-piece connector 8, and the connector 8 is supplied with NO gas of a predetermined concentration supplied from an NO tank 9.
The gas supply pipe 10 is connected. The NO tank 9
Is filled with, for example, 400 ppm of NO gas contained in nitrogen gas.

【0015】また、NOガス供給管10には、微量流量
計11が介装されると共に、減圧バルブを用いた流量調
整バルブ12が介装され、当該バルブ12の開度を調整
することによりNOガスの供給流量を調整するようにな
されている。このとき、NOガスの供給流量は、呼吸ガ
ス流量計7により計測された吸気の流量,吸気に混合さ
れるNOガスのNO濃度及び患者に投与すべきNO濃度
に基づいて決定される。なお、13は患者の呼吸器系の
乾燥を防止するために、吸気を加湿する加湿器である。
Further, the NO gas supply pipe 10 is provided with a minute flow meter 11 and a flow rate adjusting valve 12 using a pressure reducing valve. By adjusting the opening degree of the valve 12, NO flow rate is adjusted. The gas supply flow rate is adjusted. At this time, the supply flow rate of NO gas is determined based on the flow rate of inspiration measured by the respiratory gas flow meter 7, the NO concentration of NO gas mixed with the inspiration, and the NO concentration to be administered to the patient. In addition, 13 is a humidifier that humidifies the inhalation in order to prevent the respiratory system of the patient from drying.

【0016】以上が本発明の一例構成であって、次にそ
の作用について説明する。まず、患者に供給する吸気の
酸素濃度に応じてO2 ブレンダ6の混合割合を調整し、
例えば酸素濃度を25%にする場合は、100 %酸素:空
気=1:15の割合で混合すればよい。なお、酸素や空
気は無害であるので、ブレンダ6から大気中に漏れても
何ら問題がない。
The above is an example of the configuration of the present invention, and its operation will be described below. First, the mixing ratio of the O 2 blender 6 is adjusted according to the oxygen concentration of inspiration supplied to the patient,
For example, when the oxygen concentration is set to 25%, 100% oxygen: air = 1: 15 may be mixed. Since oxygen and air are harmless, there is no problem even if they leak from the blender 6 into the atmosphere.

【0017】そして、ブレンダ6で混合された空気が、
レスピレータ1から吸気回路2を通り、Tピースコネク
タ8を通過するときにNOガスと混合されて、気管内チ
ューブ4に送給される。Tピースコネクタ8にはNOガ
ス供給管10が接続され、NOガスが、呼吸ガス流量計
7により計測された吸気の流量と患者に投与すべきNO
濃度に基づいて決定される所望の混合量で供給される。
The air mixed by the blender 6 is
When it passes from the respirator 1 through the intake circuit 2 and the T-piece connector 8, it is mixed with NO gas and sent to the endotracheal tube 4. A NO gas supply pipe 10 is connected to the T-piece connector 8 so that NO gas should be administered to the patient and the flow rate of inspiration measured by the respiratory gas flow meter 7.
It is supplied in the desired mixing amount, which is determined based on the concentration.

【0018】このとき、NOガスの供給量vは例えば次
式により求まる。 v=αV/(β−α) V:呼吸ガス流量計7により計測された吸気の流量 α:患者に投与すべきNO濃度 β:NOタンク9内のNOガス濃度 例えば、呼吸ガス流量計7により計測された吸気の流量
V=毎分10リットル、患者に投与すべきNO濃度α=
10ppm 、NOタンク9内のNOガス濃度β=400ppmで
ある場合に、NOガスの供給量v=毎分256cc となる。
したがって、微量流量計11が256cc を示すように流量
調整バルブ12の弁開度を調整すれば、NO濃度が10
ppm NOガスが得られる。
At this time, the supply amount v of NO gas can be obtained by the following equation, for example. v = αV / (β-α) V: Inhalation flow rate measured by the respiratory gas flow meter 7 α: NO concentration to be administered to the patient β: NO gas concentration in the NO tank 9 For example, by the respiratory gas flow meter 7 Measured inspiratory flow rate V = 10 liters per minute, NO concentration to be administered to the patient α =
When the concentration of NO gas in the NO tank 9 is 10 ppm and the concentration of NO gas in the NO tank 9 is 400 ppm, the supply amount v of NO gas is 256 cc / min.
Therefore, if the valve opening of the flow rate adjusting valve 12 is adjusted so that the minute flow meter 11 indicates 256cc, the NO concentration will be 10
ppm NO gas is obtained.

【0019】また、NOガスが混合されることにより酸
素濃度は少し薄まるが、混合量が吸気回路2から送給さ
れる吸気の流量に比して極めて少ないので、酸素濃度は
略一定に維持される。本例の場合は、酸素濃度が25%
から僅かに薄まり、約24.4 (%) になる。したがって、
NOガスを混合することにより酸素濃度が大幅に変化す
ることがなく、吸気回路2から供給される酸素濃度がほ
ぼ一定に維持される。また、このとき、ブレンダ6にお
ける混合割合を変えて酸素濃度を変えても、V,α,β
の値は変わらないので、NOガスの混合量及びNO濃度
は変化することがなく、したがって酸素濃度及びNO濃
度を独立に調整することができる。
Although the oxygen concentration is slightly diminished by the NO gas being mixed, the oxygen concentration is maintained substantially constant because the mixing amount is extremely small compared to the flow rate of the intake air fed from the intake circuit 2. It In the case of this example, the oxygen concentration is 25%
Slightly diminishes to about 24.4 (%). Therefore,
By mixing the NO gas, the oxygen concentration does not change significantly, and the oxygen concentration supplied from the intake circuit 2 is maintained substantially constant. At this time, even if the oxygen concentration is changed by changing the mixing ratio in the blender 6, V, α, β
Does not change, the mixed amount of NO gas and the NO concentration do not change, and therefore the oxygen concentration and the NO concentration can be adjusted independently.

【0020】そして、この10ppm のNOガスが気管内
チューブ4を介して患者に投与される。このとき、NO
ガスは気管内チューブ4の直前で混合されることとなる
ので、NOガスが空気と混合されてから患者に至るまで
の管路が極めて短く、空気中の酸素と化合して猛毒であ
るNO2 が生成される前に短時間で患者に投与されるの
で、NO2 による悪影響を生ずることがない。
Then, this 10 ppm NO gas is administered to the patient via the endotracheal tube 4. At this time, NO
Since the gas is mixed immediately before the endotracheal tube 4, the conduit from the mixing of NO gas with air to the patient is extremely short, and NO 2 which is a very poisonous compound by combining with oxygen in the air. Since it is administered to the patient in a short period of time before it is generated, the adverse effects of NO 2 do not occur.

【0021】そして、患者から吐き出された呼気が,気
管内チューブ4から呼気回路3内を流れ、レスピレータ
1から外部に排出されるようになされている。したがっ
て、上記実施例のように、呼吸ガス流量計7を吸気回路
2に介装して吸気の流量を計測する場合に限らず、呼気
回路3に介装して呼気の流量を計測するようにしてもよ
い。ただし、この場合、NOガスの供給流量vは、 v=αW/β W:呼吸ガス流量計7により計測された呼気の流量 α:患者に投与すべきNO濃度 β:NOタンク9内のNOガス濃度 で求まる。
The exhaled breath exhaled from the patient flows from the endotracheal tube 4 through the expiratory circuit 3 and is discharged from the respirator 1 to the outside. Therefore, as in the above embodiment, the breathing gas flow meter 7 is not limited to the case where the inspiratory circuit 2 is provided to measure the inspiratory flow rate, but the expiratory circuit 3 is provided to measure the expiratory flow rate. May be. However, in this case, the NO gas supply flow rate v is: v = αW / β W: Expiratory flow rate measured by the respiratory gas flow meter 7 α: NO concentration to be administered to the patient β: NO gas in the NO tank 9 It can be calculated by the concentration.

【0022】また、NOガス供給管10に介装した流量
調整バルブ12をモータ(図示せず)等により自動的に
開閉させ、NOガス供給流量を自動制御してもよい。こ
の場合は、例えば微量流量計11で計測された流量と算
出されたNOガスを比較して両者が一致するようにフィ
ードバック制御を行なえばよい。
The NO gas supply flow rate may be automatically controlled by automatically opening and closing the flow rate adjusting valve 12 provided in the NO gas supply pipe 10 by a motor (not shown) or the like. In this case, for example, the flow rate measured by the micro flow meter 11 and the calculated NO gas may be compared and feedback control may be performed so that the two match.

【0023】[0023]

【発明の効果】以上述べたように、本発明によれば、気
管内チューブの直前でNOを空気と混合するようになさ
れているので、NOが空気と混合されてから患者に至る
までの管路が極めて短く、空気中の酸素と化合して猛毒
であるNO2 が生成される前に短時間で患者に投与され
るので、NO2 の発生を抑えることができ、したがって
NO2 の発生によるNOの濃度変化は殆どなく、また、
ガス混合器を使用していなのでNOが漏れることもない
ので、NO濃度を正確に管理することができるという優
れた効果を有する。さらに、NOの供給量は吸気回路か
ら供給される吸気の流量に比して極めて少ないので、吸
気の酸素濃度を殆ど一定に維持したままNO濃度を調整
することができ、ひいては吸気の酸素濃度を調整しても
これに伴って吸気のNO濃度が変化することがなく、夫
々を独立して調整することができるとい大変優れた効果
を有する。
As described above, according to the present invention, NO is mixed with air immediately before the endotracheal tube, so that the pipe from the mixing of NO with air to the patient is completed. road is very short, due to a short time because it is administered to the patient in, it is possible to suppress the generation of NO 2, thus the generation of NO 2 before NO 2 is highly toxic combines with oxygen in the air is generated Almost no change in NO concentration,
Since the gas mixer is used, NO does not leak, so that it has an excellent effect that the NO concentration can be accurately controlled. Furthermore, since the amount of NO supplied is extremely small compared to the flow rate of intake air supplied from the intake circuit, it is possible to adjust the NO concentration while maintaining the oxygen concentration of intake air almost constant. Even if the adjustments are made, the NO concentration of the intake air does not change accordingly, and it is possible to adjust each independently, which is a very excellent effect.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るNO吸入装置を示すフローシー
ト。
FIG. 1 is a flow sheet showing a NO inhaler according to the present invention.

【図2】従来のNO吸入装置を示すフローシート。FIG. 2 is a flow sheet showing a conventional NO inhaler.

【符号の説明】[Explanation of symbols]

1・・・レスピレータ 2・・・吸気回路 3・・・呼気回路 4・・・気管内チューブ 5・・・三方分岐管 7・・・呼吸ガス流量計 10・・・NOガス供給管 12・・・流量調整バルブ 1 ... Respirator 2 ... Inhalation circuit 3 ... Exhalation circuit 4 ... Endotracheal tube 5 ... Three-way branch pipe 7 ... Respiratory gas flow meter 10 ... NO gas supply pipe 12 ...・ Flow control valve

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 所定酸素濃度の吸気を患者に送給する吸
気回路(2)及び患者から吐き出される呼気を排出する
呼気回路(3)が、患者に装着される気管内チューブ
(4)に対して三方分岐管(5)を介して接続され、前
記吸気中にNOガスを混合して患者に吸入させるNO吸
入装置であって、前記吸気回路(2)と前記分岐管
(5)の連結部もしくはその近傍に所定濃度のNOガス
を供給するNOガス供給管(10)が接続され、前記吸気
回路(2)又は呼気回路(3)には吸気又は呼気の流量
を計測する呼吸ガス流量計(7)が介装され、前記NO
ガス供給管(10)には、前記呼吸ガス流量計(7)によ
り計測された吸気又は呼気の流量,吸気に混合されるN
OガスのNO濃度及び患者に投与すべきNO濃度に基づ
いて決定された供給流量でNOガスを供給する流量調整
バルブ(12)が介装されたことを特徴とするNO吸入装
置。
1. An inhalation circuit (2) for supplying inhalation of a predetermined oxygen concentration to a patient and an exhalation circuit (3) for exhaling exhalation exhaled from the patient are provided to an endotracheal tube (4) attached to the patient. A three-way branch pipe (5) connected to the inhalation circuit (2) and the branch pipe (5), the NO inhaler being configured to mix NO gas into the inhalation and inhale it to a patient. Alternatively, a NO gas supply pipe (10) for supplying NO gas having a predetermined concentration is connected to the vicinity thereof, and a respiratory gas flow meter (for measuring the flow rate of inhalation or exhalation) is connected to the intake circuit (2) or the exhalation circuit (3) 7) is interposed, and the NO
In the gas supply pipe (10), the flow rate of inspiration or expiration measured by the respiratory gas flow meter (7), and N mixed with the inspiration
An NO inhaler comprising a flow rate adjusting valve (12) for supplying NO gas at a supply flow rate determined based on the NO concentration of O gas and the NO concentration to be administered to a patient.
JP18483294A 1994-08-05 1994-08-05 Gaseous no inhalator Pending JPH0847534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18483294A JPH0847534A (en) 1994-08-05 1994-08-05 Gaseous no inhalator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18483294A JPH0847534A (en) 1994-08-05 1994-08-05 Gaseous no inhalator

Publications (1)

Publication Number Publication Date
JPH0847534A true JPH0847534A (en) 1996-02-20

Family

ID=16160090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18483294A Pending JPH0847534A (en) 1994-08-05 1994-08-05 Gaseous no inhalator

Country Status (1)

Country Link
JP (1) JPH0847534A (en)

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US10926054B2 (en) 2008-08-21 2021-02-23 Vero Biotech LLC Systems and devices for generating nitric oxide
US11202880B2 (en) 2004-08-18 2021-12-21 Vero Biotech LLC Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11312626B2 (en) 2008-01-28 2022-04-26 Vero Biotech Inc. Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11554241B2 (en) 2004-08-18 2023-01-17 Vero Biotech Inc. Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11925764B2 (en) 2009-06-22 2024-03-12 Vero Biotech Inc. Nitric oxide therapies

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11202880B2 (en) 2004-08-18 2021-12-21 Vero Biotech LLC Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11291793B2 (en) 2004-08-18 2022-04-05 Vero Biotech Inc. Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11383059B2 (en) 2004-08-18 2022-07-12 Vero Biotech Inc. Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11554241B2 (en) 2004-08-18 2023-01-17 Vero Biotech Inc. Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11312626B2 (en) 2008-01-28 2022-04-26 Vero Biotech Inc. Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US11884541B2 (en) 2008-01-28 2024-01-30 Vero Biotech Inc. Conversion of nitrogen dioxide (NO2) to nitric oxide (NO)
US10926054B2 (en) 2008-08-21 2021-02-23 Vero Biotech LLC Systems and devices for generating nitric oxide
US11744978B2 (en) 2008-08-21 2023-09-05 Vero Biotech Inc. Systems and devices for generating nitric oxide
US11925764B2 (en) 2009-06-22 2024-03-12 Vero Biotech Inc. Nitric oxide therapies
JP2017521147A (en) * 2014-06-18 2017-08-03 マケット・クリティカル・ケア・アーベー Additive gas supply device
US10758691B2 (en) 2014-06-18 2020-09-01 Maquet Critical Care Ab Additive gas delivery apparatus

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