JP3002959B2 - Anesthesia circuit - Google Patents
Anesthesia circuitInfo
- Publication number
- JP3002959B2 JP3002959B2 JP9014191A JP1419197A JP3002959B2 JP 3002959 B2 JP3002959 B2 JP 3002959B2 JP 9014191 A JP9014191 A JP 9014191A JP 1419197 A JP1419197 A JP 1419197A JP 3002959 B2 JP3002959 B2 JP 3002959B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- bellows
- circuit
- exhalation
- intake
- 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.)
- Expired - Fee Related
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- Respiratory Apparatuses And Protective Means (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、呼吸回路に漏れが
あっても麻酔に支障が生じないようにした麻酔器の回路
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit for an anesthesia machine in which even if there is a leak in a respiratory circuit, anesthesia is not affected.
【０００２】[0002]
【従来の技術】従来の麻酔器の回路は、一般に図２に示
す構成を備える。図２において１は吸気路で、該吸気路
１には、酸素と麻酔ガスを混合してなるフレッシュガス
を収容したフレッシユガス源２と、酸素フラッシユ弁３
と酸素源４の直列回路とが、並列状態で始端に接続さ
れ、中間部に逆止弁型の吸気弁５が設けられ、終端が患
者に被せるマスク６に至るものものである。2. Description of the Related Art A circuit of a conventional anesthesia machine generally has a configuration shown in FIG. In FIG. 2, reference numeral 1 denotes an intake passage. The intake passage 1 includes a fresh gas source 2 containing a fresh gas obtained by mixing oxygen and an anesthetic gas, and an oxygen flash valve 3.
And a series circuit of an oxygen source 4 are connected in parallel at the start end, a check valve type inhalation valve 5 is provided in the middle part, and the end reaches a mask 6 which covers the patient.
【０００３】この吸気路１とは別に、マスク６に接続す
る呼気路７が設けられ、該呼気路７には、中間部に逆止
弁型の呼気弁８が設けられ、終端が伸縮性のある縦型の
ベローズ９の底部に接続されている。該ベローズ９は、
極めて撓み易い部材で作られていて、ヒダの部分で撓ん
で上下方向に伸縮することにより、ガスを吸入排出す
る。[0003] In addition to the intake passage 1, an exhalation passage 7 is provided which is connected to a mask 6. The exhalation passage 7 is provided with a non-return valve type exhalation valve 8 at an intermediate portion, and the end thereof is elastic. It is connected to the bottom of a vertical bellows 9. The bellows 9
It is made of an extremely flexible member, and is bent at the folds to expand and contract in the vertical direction, thereby inhaling and discharging gas.
【０００４】また、吸気路１の吸気弁５の上流側と呼気
路７の呼気弁８の下流側の間に、炭酸ガス吸収装置１０
が連通路１０ａによって接続され、呼気を浄化して吸気
路１から患者側に再循環するようになっている。そし
て、前記吸気路１、マスク６、呼気路７、ベローズ９、
炭酸ガス吸収装置１０等によって呼吸回路１１が形成さ
れ、フレッシユガス又は酸素は、矢印方向に流れる。A carbon dioxide absorbing device 10 is provided between the upstream side of the intake valve 5 in the intake path 1 and the downstream side of the exhalation valve 8 in the exhalation path 7.
Are connected by a communication passage 10a to purify the exhaled air and recirculate the air from the inhalation passage 1 to the patient side. Then, the intake path 1, the mask 6, the expiratory path 7, the bellows 9,
The breathing circuit 11 is formed by the carbon dioxide gas absorbing device 10 and the like, and the fresh gas or oxygen flows in the direction of the arrow.
【０００５】ベローズ９は、透明の圧力チャンバー１２
で囲まれ、該圧力チャンバー１２は、圧力管１３と切り
替え弁１４を介して、手動バッグ１５とベンチレータ１
６に接続されており、圧力チャンバー１２、圧力管１
３、手動バッグ１５等の内部には酸素、空気などの操作
用ガスが封入されている。手動バッグ１５の口部には、
通路１７を介して送気弁１８と排気弁１９が接続され、
送気弁１８に酸素源又は空気源が接続されている。ベン
チレータ１６は、操作ガスの圧力を自動的に増減するも
のである。The bellows 9 includes a transparent pressure chamber 12.
The pressure chamber 12 is connected to the manual bag 15 and the ventilator 1 via a pressure pipe 13 and a switching valve 14.
6, the pressure chamber 12, the pressure pipe 1
3. An operation gas such as oxygen or air is sealed inside the manual bag 15 or the like. At the mouth of the manual bag 15,
An air supply valve 18 and an exhaust valve 19 are connected via a passage 17,
An oxygen source or an air source is connected to the air supply valve 18. The ventilator 16 automatically increases and decreases the pressure of the operation gas.
【０００６】手動バッグ１５は、手動で操作して患者に
人工呼吸を施すものであり、ベンチユレータ１６は、自
動機で人工呼吸をさせるためのものであり、いずれも圧
力チャンバー１２内の圧力を昇降させてベローズ９を伸
縮させ、逆止弁型の弁５，８と共同してポンプ作用を行
なわせ、ガスを呼気路７からベローズ９に吸い込んだの
ち押し出し、連通路１０ａと炭酸ガス吸収装置１０を経
て患者側に再循環させる。この間、フレッシュガス源２
からはフレッシュガスが補給されている。[0006] The manual bag 15 is operated manually to apply artificial respiration to the patient, and the ventilator 16 is used to perform artificial respiration by an automatic machine, and both increase and decrease the pressure in the pressure chamber 12. This causes the bellows 9 to expand and contract, and causes the bellows 9 to perform a pumping action in cooperation with the check valve type valves 5 and 8. And recirculation to the patient. Meanwhile, fresh gas source 2
Is supplied with fresh gas.
【０００７】呼気路７には、排気路２０を介してオーバ
ーフロー弁２１が接続され、オーバーフロー弁２１は、
流入部２１ａ，弁座２１ｂ，弁ダイヤフラム２１ｃ，圧
力室２１ｄ，極めて弱いバネ２１ｅを備え、圧力室２１
ｄは、連通管２２で圧力管１３に連通している。したが
って、このオーバーフロー弁２１は、流入部２１ａ内の
圧力と、圧力管１３内の圧力との圧力差が作用してい
る。該オーバーフロー弁２１は、呼吸回路１１にフレッ
シュガスまたは酸素が供給されてベローズ９が上限まで
伸び、その内側の圧力が外側の圧力より水柱１０ｍｍ程
度高くなると、ガスを大気に放出するリリーフ弁であ
る。前記バネ２１ｅの弾力は無視できる程度のものとさ
れ、該バネ２１ｅはなくてもよい。[0007] An overflow valve 21 is connected to the expiratory path 7 via an exhaust path 20.
The pressure chamber 21 includes an inflow portion 21a, a valve seat 21b, a valve diaphragm 21c, a pressure chamber 21d, and an extremely weak spring 21e.
“d” communicates with the pressure pipe 13 through the communication pipe 22. Therefore, a pressure difference between the pressure in the inflow portion 21 a and the pressure in the pressure pipe 13 acts on the overflow valve 21. The overflow valve 21 is a relief valve that releases gas to the atmosphere when fresh gas or oxygen is supplied to the breathing circuit 11 and the bellows 9 extends to the upper limit and the pressure inside the bellows 9 becomes higher than the pressure outside by about 10 mm of water. . The elasticity of the spring 21e is negligible, and the spring 21e may not be provided.
【０００８】また、圧力チャンバー１２と手動バッグ１
５には、送気弁１８から操作用ガスとして酸素または空
気を供給することができ、入れ過ぎたときは排気弁１９
から放出してバッグ１５の膨らみを調節し、手で握って
圧縮膨脹させ易い膨らみにする。そして、手動バッグ１
５を手で圧縮膨脹させる操作を繰り返すと、麻酔ガス
は、ベローズ９から炭酸ガス吸収装置１０とマスク６を
経てベローズ９戻る作用を繰り返し、これにより人工呼
吸が行なわれる。The pressure chamber 12 and the manual bag 1
5 can be supplied with oxygen or air as an operating gas from an air supply valve 18, and an exhaust valve 19
The swelling of the bag 15 is adjusted, and the swelling is made easy to be compressed and inflated by grasping with the hand. And the manual bag 1
When the operation of compressing and expanding 5 by hand is repeated, the anesthesia gas returns to the bellows 9 from the bellows 9 via the carbon dioxide gas absorbing device 10 and the mask 6, and thereby the artificial respiration is performed.
【０００９】このベローズ９は、フローティングベロー
ズ型と称され、呼吸回路１にガス漏れがあると、ガス量
が不足してベローズ９が膨脹時に上限位置に達すること
ができず、この状態は、透明の圧力チャンバー１２の外
からベローズ９を目視して確認できるから、ガス漏れを
発見し易い利点がある。The bellows 9 is called a floating bellows type. If there is a gas leak in the breathing circuit 1, the amount of gas is insufficient and the bellows 9 cannot reach the upper limit position when inflated. Since the bellows 9 can be visually confirmed from outside the pressure chamber 12, there is an advantage that a gas leak can be easily found.
【００１０】しかし、人工呼吸をしているとき、又は麻
酔の導入時などで患者が自然呼吸で換気しているとき、
ある程度の漏れを承知で使用していても、ベローズ９が
自重で潰れると、手動バッグ１５を伸縮させてもその伸
縮に正しく追従しなくなるので使用上不便であり、自然
呼吸の場合は吸気が困難になる．そこで、手動バッグを
膨らませるべく酸素フラッシュをすると、呼吸回路１１
内のガスが希釈される。[0010] However, when the patient is ventilating by natural breathing during artificial respiration or when anesthesia is introduced,
Even if a certain amount of leakage is used, if the bellows 9 is crushed by its own weight, even if the manual bag 15 is expanded and contracted, it will not follow the expansion and contraction properly, which is inconvenient in use. become. Therefore, when oxygen flush is performed to inflate the manual bag, the breathing circuit 11
The gas inside is diluted.
【００１１】なお、ベローズ９として、ガス漏れ時に自
重で潰れない程度の強さの彈性材を使用すると、自然呼
吸時にベローズ９は伸びきった状態になり、呼気のとき
はそれ以上ベローズ９が伸びず、吸気のときも殆ど縮ま
ないので、呼吸が困難になる不都合があり、このような
彈性材の使用はできない。When a bellows 9 is made of an elastic material having such a strength that it does not collapse under its own weight in the event of gas leakage, the bellows 9 will be fully extended during natural breathing, and will be further extended during exhalation. In addition, it hardly shrinks during inhalation, so there is a disadvantage that breathing becomes difficult, and such an elastic material cannot be used.
【００１２】[0012]
【発明が解決しようとする課題】本発明は、呼吸回路に
ガス漏れがあるとき、ベローズが自重で潰れるのを防止
することを課題とする。SUMMARY OF THE INVENTION It is an object of the present invention to prevent a bellows from being crushed by its own weight when there is a gas leak in a breathing circuit.
【００１３】[0013]
【課題を解決するための手段】前記課題を解決するため
の手段のうち、第１の手段は、請求項１に記載したとお
り、フレッシュガス源から逆止弁型の吸気弁を経てマス
クに至る吸気路と、該マスクから逆止弁型の呼気弁を経
てベローズの底部に至る呼気路と、吸気弁の上流側と呼
気弁の下流側を連絡する連通路に設けた炭酸ガス吸収装
置とで呼吸回路を形成し、更に前記ベローズを囲む圧力
チャンバーを手動バッグに接続する圧力管と、前記呼気
弁の下流に設けた排気路と、該排気路にあって該排気路
側と前記圧力管側の圧力差が作用するオーバーフロー弁
とを備える麻酔器の回路において、前記ベローズの自己
収縮による陽圧が炭酸ガス吸収装置を経て前記吸気弁に
作用して生じる開弁力にバランスさせるべく、該吸気弁
を閉方向に付勢する弁バネ又は重りを該吸気弁に設けた
ことを特徴とする。According to the first aspect of the present invention, as described in the first aspect, the first means extends from a fresh gas source to a mask via a check valve type intake valve. An intake passage, an exhalation passage extending from the mask to the bottom of the bellows via a check valve type exhalation valve, and a carbon dioxide gas absorption device provided in a communication passage connecting the upstream side of the intake valve and the downstream side of the exhalation valve. Forming a breathing circuit, further connecting a pressure chamber surrounding the bellows to a manual bag, a pressure pipe, an exhaust path provided downstream of the exhalation valve, and an exhaust path in the exhaust path side and the pressure pipe side. An overflow valve on which a pressure difference acts, wherein the positive pressure due to the self-shrinkage of the bellows is balanced with a valve opening force generated by acting on the intake valve via a carbon dioxide gas absorbing device. Bias in the closing direction The valve spring or weight, characterized in that provided in the intake valve.
【００１４】この手段によれば、ベローズが自重で収縮
して生じる陽圧が吸気弁に作用しても、該吸気弁は、弁
バネ又は重りに押されて開弁せず、ベローズが自重で収
縮するのが防止される。According to this means, even if the bellows contracts due to its own weight and the positive pressure generated by the bellows acts on the intake valve, the intake valve is not opened by the valve spring or the weight, and the bellows is under its own weight. Shrinkage is prevented.
【００１５】また第２の手段は、請求項２に記載したと
おり、フレッシュガス源から逆止弁型の吸気弁を経てマ
スクに至る吸気路と、該マスクから逆止弁型の呼気弁を
経てベローズの底部に至る呼気路と、吸気弁の上流側と
呼気弁の下流側を連絡する連通路に設けた炭酸ガス吸収
装置とで呼吸回路を形成し、更に前記ベローズを囲む圧
力チャンバーを手動バッグに接続する圧力管と、前記呼
気弁の下流に設けた排気路と、該排気路にあって該排気
路側と前記圧力管側の圧力差が作用するオーバーフロー
弁とを備える麻酔器の回路において、前記ベローズが潰
れたときベローズの頂部を略半分の高さに弾力的に支持
する支持バネを、ベローズ内に設けたことを特徴とす
る。The second means may include an intake path from a fresh gas source through a check valve type intake valve to a mask, and a mask from the mask via a check valve type exhalation valve. A breathing circuit is formed by an exhalation passage reaching the bottom of the bellows, and a carbon dioxide absorption device provided in a communication passage connecting the upstream side of the intake valve and the downstream side of the exhalation valve. In a circuit of an anesthesia machine comprising a pressure pipe connected to the, an exhaust path provided downstream of the exhalation valve, and an overflow valve in the exhaust path on which a pressure difference between the exhaust path side and the pressure pipe side acts. A support spring for elastically supporting the top of the bellows at approximately half the height when the bellows is crushed is provided in the bellows.
【００１６】この手段によれば、呼吸回路にガス漏れが
生じてベローズが縮んでも、ベローズの高さが半減した
状態で頂部が支持バネで支えられる。この状態でもバネ
を圧縮してある程度の収縮ができ、膨脹は自由にできる
から、人工呼吸を行なうことができ、自然呼吸もでき
る。According to this means, even if gas leaks in the breathing circuit and the bellows shrinks, the top is supported by the support spring in a state where the height of the bellows is reduced by half. Even in this state, the spring can be compressed and contracted to some extent, and can be freely expanded, so that artificial respiration can be performed and natural respiration can be performed.
【００１７】[0017]
【発明の実施の形態】以下、図１を参照して発明の実施
の形態を説明する。図１において図２と共通する部分に
は、共通する符号を付して詳しい説明は省略する。図１
において、吸気路１、マスク６、呼気路７、ベローズ
９、炭酸ガス吸収装置１０等によって呼吸回路１１が形
成されていることは図２のものと同じであるが、吸気路
１の吸気弁５には閉弁方向に作用する弁バネ５ａが付設
され、ベローズ９の内部には該ベローズ９を略半分の高
さに支持する支持バネ９ａが取り付けられている。Embodiments of the present invention will be described below with reference to FIG. In FIG. 1, portions common to FIG. 2 are denoted by common reference numerals, and detailed description is omitted. FIG.
2, the breathing circuit 11 is formed by the intake path 1, the mask 6, the exhalation path 7, the bellows 9, the carbon dioxide absorbing device 10 and the like, as in FIG. Is provided with a valve spring 5a acting in the valve closing direction. Inside the bellows 9, a support spring 9a for supporting the bellows 9 at approximately half the height is attached.
【００１８】以上の構成であるから、図１について説明
したように、手動バッグ１５を伸縮させると、操作用ガ
スの圧力変動でベローズ９も伸縮し、そのポンプ作用に
より、ガスを炭酸ガス吸収装置１０を経てマスク６に送
り呼気路７から戻す循環作用をさせることができる。そ
して、呼吸回路１１の吸気弁５の下流でガス漏れが生じ
て非加圧時にベローズ９が自重で収縮しようとしても、
収縮で生じる陽圧に対して吸気弁５の弁バネ５ａが抵抗
して開弁を阻止し、ベローズ９の潰れは防止される。As described above with reference to FIG. 1, when the manual bag 15 is expanded and contracted, the bellows 9 also expands and contracts due to the pressure fluctuation of the operating gas. A circulating action can be provided to the mask 6 via 10 and return from the expiratory passage 7. Then, even if a gas leak occurs downstream of the intake valve 5 of the breathing circuit 11 and the bellows 9 tries to contract by its own weight at the time of non-pressurization,
The valve spring 5a of the intake valve 5 resists the positive pressure generated by the contraction and prevents the valve from opening, so that the bellows 9 is prevented from collapsing.
【００１９】更に、呼吸回路１１内のガス漏れでベロー
ズ９が自重で収縮しても、支持バネ９ａでベローズ９の
略半分の収縮は阻止される。Further, even if the bellows 9 contracts by its own weight due to gas leakage in the breathing circuit 11, the support spring 9a prevents substantially half of the bellows 9 from contracting.
【００２０】以上の２手段で、それぞれベローズ９の収
縮が阻止されて潰れれが防止されるから、自然呼吸また
は人工呼吸を継続することができる。各手段のうち、弁
バネ５ａは吸気弁５から呼気弁８までの間に漏れがある
場合に有効であり、支持バネ９ａは、呼吸回路１１の全
体に漏れがある場合に有効であるから、これらの手段の
一つ以上を備えれば実質上の支障は生じない。なお、吸
気弁５は、図示の一つだけではなく二つ以上を直列に設
けてもよい。With the above two means, the contraction of the bellows 9 is prevented, and the bellows 9 is prevented from being crushed, so that natural respiration or artificial respiration can be continued. Among the respective means, the valve spring 5a is effective when there is a leak between the intake valve 5 and the exhalation valve 8, and the support spring 9a is effective when the entire respiratory circuit 11 has a leak. If one or more of these means is provided, no substantial hindrance will occur. In addition, the intake valve 5 may be provided not only in one figure but two or more in series.
【００２１】[0021]
【発明の効果】以上の説明から明らかなとおり、請求項
１の手段によれば、吸気弁から呼気弁までの間に漏れが
あっても、吸気弁に弁バネを設けるだけで、ベローズの
自重により生じる陽圧に対抗して該吸気弁からガスが漏
れるのを防止でき、べローズが潰れたままになって呼吸
困難になるのを防止できる効果がある。As is apparent from the above description, according to the first aspect of the present invention, even if there is a leak between the intake valve and the exhalation valve, the weight of the bellows is reduced only by providing a valve spring on the intake valve. Gas can be prevented from leaking from the intake valve against the positive pressure generated by the above, and there is an effect that it is possible to prevent the bellows from being crushed and becoming difficult to breathe.
【００２２】請求項２の手段によれば、べローズに支持
バネを内設するという簡単且つ直接的な手段で、べロー
ズが潰れることを阻止でき、これにより呼吸困難になる
のを防止できる効果がある。According to the second aspect of the present invention, the bellows can be prevented from being crushed by a simple and direct means of providing a support spring in the bellows, thereby preventing difficulty in breathing. There is.
【図１】 本発明の実施の形態を示す回路図FIG. 1 is a circuit diagram illustrating an embodiment of the present invention.
【図２】 従来技術を示す回路図FIG. 2 is a circuit diagram showing a conventional technique.
１ 吸気路 ２ フレッシュガス源 ５ 吸気弁 ６ マスク ５ａ 弁バネ ７ 呼気路 ９ ベローズ ９ 支持バネ １０ 炭酸ガス吸収装置 １１ 呼吸回路 １２ ベローズ １５ 手動バッグ ２１ オーバーフロー弁 DESCRIPTION OF SYMBOLS 1 Intake path 2 Fresh gas source 5 Intake valve 6 Mask 5a Valve spring 7 Expiration path 9 Bellows 9 Support spring 10 Carbon dioxide absorber 11 Respiratory circuit 12 Bellows 15 Manual bag 21 Overflow valve
Claims (2)
を経てマスクに至る吸気路と、該マスクから逆止弁型の
呼気弁を経てベローズの底部に至る呼気路と、吸気弁の
上流側と呼気弁の下流側を連絡する連通路に設けた炭酸
ガス吸収装置とで呼吸回路を形成し、更に前記ベローズ
を囲む圧力チャンバーを手動バッグに接続する圧力管
と、前記呼吸回路から分岐した排気路と、該排気路にあ
って該排気路側と前記圧力管側の圧力差が作用するオー
バーフロー弁とを備える麻酔器の回路において、前記ベ
ローズの自己収縮による陽圧が吸気弁に作用して生じる
開弁力に対抗させるべく、該吸気弁を閉方向に付勢する
弁バネ又は重りを該吸気弁に設けたことを特徴とする、
麻酔器の回路。1. An intake path from a fresh gas source via a check valve type intake valve to a mask, an exhalation path from the mask via a check valve type exhalation valve to the bottom of the bellows, and an upstream of the intake valve. A breathing circuit is formed by a carbon dioxide absorbing device provided in a communication passage connecting the side and the downstream side of the exhalation valve, and a pressure pipe connecting a pressure chamber surrounding the bellows to a manual bag, and a branch from the breathing circuit. In a circuit of an anesthesia machine equipped with an exhaust path and an overflow valve in the exhaust path where a pressure difference between the exhaust path side and the pressure pipe side acts, positive pressure due to self-contraction of the bellows acts on an intake valve. A valve spring or weight is provided on the intake valve to bias the intake valve in the closing direction so as to oppose the generated valve opening force.
Anesthesia circuit.
を経てマスクに至る吸気路と、該マスクから逆止弁型の
呼気弁を経てベローズの底部に至る呼気路と、吸気弁の
上流側と呼気弁の下流側を連絡する連通路に設けた炭酸
ガス吸収装置とで呼吸回路を形成し、更に前記ベローズ
を囲む圧力チャンバーを手動バッグに接続する圧力管
と、前記呼吸回路から分岐した排気路と、該排気路にあ
って該排気路側と前記圧力管側の圧力差が作用するオー
バーフロー弁とを備える麻酔器の回路において、前記ベ
ローズが収縮したときベローズの頂部を略半分の高さに
弾力的に支持する支持バネを、ベローズ内に設けたこと
を特徴とする、麻酔器の回路。2. An intake path from a fresh gas source through a check valve type intake valve to a mask, an exhalation path from the mask through a check valve type exhalation valve to the bottom of the bellows, and an upstream of the intake valve. A breathing circuit is formed by a carbon dioxide absorbing device provided in a communication passage connecting the side and the downstream side of the exhalation valve, and a pressure pipe connecting a pressure chamber surrounding the bellows to a manual bag, and a branch from the breathing circuit. In a circuit of an anesthesia machine comprising an exhaust path, and an overflow valve in the exhaust path on which a pressure difference between the exhaust path side and the pressure pipe side acts, when the bellows contracts, the top of the bellows is raised to approximately half the height. A circuit for an anesthesia machine, wherein a support spring for elastically supporting the circuit is provided in the bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9014191A JP3002959B2 (en) | 1997-01-28 | 1997-01-28 | Anesthesia circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9014191A JP3002959B2 (en) | 1997-01-28 | 1997-01-28 | Anesthesia circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10211282A JPH10211282A (en) | 1998-08-11 |
| JP3002959B2 true JP3002959B2 (en) | 2000-01-24 |
Family
ID=11854244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9014191A Expired - Fee Related JP3002959B2 (en) | 1997-01-28 | 1997-01-28 | Anesthesia circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3002959B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE529989C2 (en) * | 2004-09-03 | 2008-01-29 | Ric Investments Llc | Gas regulator |
| KR101005217B1 (en) | 2008-10-29 | 2010-12-31 | 충북대학교 산학협력단 | One way air flow valve |
| US9072859B2 (en) * | 2011-05-31 | 2015-07-07 | Naoyuki Ishikita | Anesthetic inhalation aid device and attachment used for the same |
-
1997
- 1997-01-28 JP JP9014191A patent/JP3002959B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10211282A (en) | 1998-08-11 |
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