JP2593389B2 - Automatic calibration device and automatic calibration method for transcutaneous oxygen / carbon dioxide partial pressure measuring device sensor - Google Patents
Automatic calibration device and automatic calibration method for transcutaneous oxygen / carbon dioxide partial pressure measuring device sensorInfo
- Publication number
- JP2593389B2 JP2593389B2 JP4185747A JP18574792A JP2593389B2 JP 2593389 B2 JP2593389 B2 JP 2593389B2 JP 4185747 A JP4185747 A JP 4185747A JP 18574792 A JP18574792 A JP 18574792A JP 2593389 B2 JP2593389 B2 JP 2593389B2
- Authority
- JP
- Japan
- Prior art keywords
- partial pressure
- sensor
- standard
- gas
- calibration
- 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 - Lifetime
Links
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims description 64
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims description 43
- 229910052760 oxygen Inorganic materials 0.000 title claims description 43
- 239000001301 oxygen Substances 0.000 title claims description 43
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims description 32
- 239000001569 carbon dioxide Substances 0.000 title claims description 32
- 238000000034 method Methods 0.000 title claims description 16
- 239000007789 gas Substances 0.000 claims description 52
- 101100348341 Caenorhabditis elegans gas-1 gene Proteins 0.000 claims description 23
- 101100447658 Mus musculus Gas1 gene Proteins 0.000 claims description 23
- 101100447665 Mus musculus Gas2 gene Proteins 0.000 claims description 18
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 1
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 239000012159 carrier gas Substances 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004087 circulation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000474 nursing effect Effects 0.000 description 2
- 230000003836 peripheral circulation Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Landscapes
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、経皮的に血中酸素分圧
及び二酸化炭素分圧を測定する経皮酸素・二酸化炭素分
圧測定装置のセンサ較正装置の改良に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a sensor calibration device for a transcutaneous oxygen / carbon dioxide partial pressure measuring device for measuring transcutaneous blood oxygen partial pressure and carbon dioxide partial pressure.
【０００２】[0002]
【従来の技術】血液中の酸素分圧，二酸化炭素分圧を測
定することは、診療上、非常に重要な測定項目となって
おり、特に未熟児，新生児の呼吸管理に不可欠といえ
る。血液を採取して測定する代わりに皮膚にセンサを当
てて皮膚直下の血流の末梢循環における経皮酸素分圧及
び二酸化炭素分圧を電気化学的方法で測定して診断する
方法を具体化した経皮酸素・二酸化炭素分圧測定装置が
開発され用いられてきた。また、この測定装置の中のヒ
ーティングパワー方式では、さらにセンサ電極部分の温
度を一定に保持するために供給される電力量、即ちヒー
ティングパワーが血液の末梢循環における循環速度に比
例することを利用し、循環速度をも測定できるようにな
っている。2. Description of the Related Art Measuring the oxygen partial pressure and the carbon dioxide partial pressure in blood is a very important measurement item in clinical practice, and can be said to be indispensable especially for respiratory management of premature and newborn babies. Instead of taking and measuring blood, a method was developed in which a sensor was applied to the skin and the percutaneous oxygen partial pressure and carbon dioxide partial pressure in the peripheral circulation of blood flow immediately below the skin were measured by an electrochemical method to make a diagnosis. Transcutaneous oxygen / carbon dioxide partial pressure measuring devices have been developed and used. Further, in the heating power method in this measuring device, the amount of power supplied to keep the temperature of the sensor electrode portion constant, that is, the heating power is proportional to the circulation speed in the peripheral circulation of blood. It can be used to measure the circulation speed.
【０００３】この装置を常に使用可能状態に保持し、正
確な安定した測定データを得るためには、酸素分の多い
標準混合ガス−１（例えば酸素２１％，二酸化炭素５
％、残部不活性キャリヤガス、以下単にガス−１と略称
する）による酸素分圧が例えば１５７ｍｍＨｇ，二酸化
炭素２５ｍｍＨｇを示し，二酸化炭素分の多い標準混合
ガス−２（例えば酸素０％，二酸化炭素１０％、残余不
活性キャリヤガス、以下単にガス−２と略称する）によ
る二酸化炭素分圧が例えば５０ｍｍＨｇを示すようにな
っていることが必要である。しかしながら、この装置の
皮膚に当てるセンサ（電極構成部分）は装置が微小且つ
構造が精巧であり、各センサはそれぞれ特性が異なるた
め、測定開始後の不安定期間はもちろん、継続使用中
（モニタリング中）に於いても個々のセンサの特性が変
動して行くという特徴があるので前記標準ガスによる較
正を繰り返し、充分安定した設定値を示すように保持し
ておくことが必要である。[0003] In order to keep the apparatus always usable and to obtain accurate and stable measurement data, a standard mixed gas-1 containing a large amount of oxygen (for example, 21% oxygen, 5% carbon dioxide).
%, The remaining inert carrier gas (hereinafter simply referred to as gas-1) indicates an oxygen partial pressure of, for example, 157 mmHg and carbon dioxide of 25 mmHg, and a standard mixed gas-2 rich in carbon dioxide (for example, 0% oxygen, 10% carbon dioxide). %, The residual inert carrier gas (hereinafter simply abbreviated to gas-2) must have a carbon dioxide partial pressure of, for example, 50 mmHg. However, the sensor (electrode component) applied to the skin of this device is very small and the structure is sophisticated, and the characteristics of each sensor are different. Therefore, during the unstable period after the start of measurement, as well as during continuous use (during monitoring) Since the characteristic of each sensor fluctuates also in the case of (1), it is necessary to repeat the calibration using the standard gas and hold the value so as to show a sufficiently stable set value.
【０００４】[0004]
【発明が解決すべき課題】従来、この較正方法として、
操作者は手動操作で前記２種の標準ガスをセンサ電極面
に流し、自己の判断で適宜時間間隔でそれぞれ酸素分
圧，二酸化炭素分圧表示値の二点較正を行なっていた。
しかしながら、この較正は熟練を必要とし、また安定す
るまでかなりの時間がかかる場合があり、操作者にとっ
て、また病院看護のマンパワーの面から大きな負担とな
っていた。この改善方法として、前記較正の自動化が図
られている。例えば、スタート時の較正から所定等間隔
時間置きに、各標準ガスを用いて二点自動較正を継続し
て行なう方法が提案されているが、標準ガスの消費が多
く安定状態を確認するまでに時間がかかる欠点がある。Conventionally, as this calibration method,
The operator manually flows the two kinds of standard gases to the sensor electrode surface, and performs two-point calibration of the oxygen partial pressure and carbon dioxide partial pressure display values at appropriate time intervals at his own discretion.
However, this calibration requires skill and may take a considerable amount of time to stabilize, placing a heavy burden on the operator and from the manpower of hospital nursing. As an improvement method, automation of the calibration is attempted. For example, a method has been proposed in which two-point automatic calibration is continuously performed using each standard gas at predetermined regular intervals from the calibration at the time of starting, but until the consumption of the standard gas is large and a stable state is confirmed. There is a disadvantage that it takes time.
【０００５】発明者らは、センサの特性として較正後の
初期の段階ではガス分圧値は不安定であるが、その後は
安定した状態を示すものが多く、且つ、ガス−１には二
酸化炭素ガスも含まれており、二酸化炭素分圧値の変動
は酸素分圧値の変動に比して遥かに緩やかで、ガス−１
による較正時の酸素分圧値が所定範囲内にあれば改めて
二酸化炭素とキャリヤガスからなるガス−２による較正
を省略しても良いこと，及び安定後の中間段階ではセン
サにガス−１の代わりに空気を通して酸素分圧値を検出
することができ、これにより高価な標準ガスの節約がで
きることを見いだした。更にガス−２を省略する方法、
或いは途中でガス−１の代替として空気を利用する方法
の何れの場合にも、特に不安定な初期段階においては、
その切り換えの時間的スケジュールは綿密な段階制御を
必要とし、精密な自動制御に頼らざるを得ないことを見
出し、本発明を完成した。[0005] The inventors of the present invention have found that as a sensor characteristic, the gas partial pressure value is unstable at an early stage after calibration, but many show a stable state thereafter. The gas also contains gas, and the variation in the partial pressure of carbon dioxide is much slower than the variation in the partial pressure of oxygen.
If the oxygen partial pressure value at the time of calibration is within a predetermined range, the calibration with gas-2 consisting of carbon dioxide and carrier gas may be omitted again, and in the intermediate stage after stabilization, the sensor may be replaced with gas-1. It has been found that the oxygen partial pressure value can be detected by passing air through it, thereby saving expensive standard gases. Further, a method of omitting gas-2,
Alternatively, in any of the methods using air as an alternative to gas-1 on the way, especially in the unstable initial stage,
The inventors have found that the time schedule of the switching requires a precise step control and must rely on precise automatic control, and thus completed the present invention.
【０００６】[0006]
【課題を解決するための手段】本発明によれば、センサ
の自動較正装置を内蔵した経皮酸素・二酸化炭素分圧測
定装置において；該自動較正装置はＡ．標準ガス入，排
出口及び酸素分圧値検定用空気の入，排出用の空気導通
孔を有するセンサチャンバ及びセンサ押圧板からなるセ
ンサ載置部，Ｂ．標準混合ガス−１ボンベ，標準混合ガ
ス−２ボンベ，電磁弁からなり前記センサ載置チャンバ
に各標準混合ガスを送る標準混合ガス供給装置，Ｃ．較
正装置のオン、オフ及び前記電磁弁を開閉制御する制御
回路，Ｄ．標準混合ガスを送流中の酸素分圧値及び二酸
化炭素分圧値が、該混合ガスのセ ンサの酸素分圧値及び
二酸化炭素分圧値の電気信号を受け、該混合ガスが示す
べき標準設定値からの乖離、及び空気を流した際の酸素
分圧値の前記標準設定値からの乖離が許容範囲外ならば
自動較正する演算回路，Ｅ．前記演算回路からの電気信
号により各ガス分圧値を表示する表示回路からなること
を特徴とする経皮酸素・二酸化炭素分圧測定装置センサ
の自動較正装置、及びこの装置を用いたセンサの自動較
正方法が提供される。According to the present invention, there is provided a transcutaneous oxygen / carbon dioxide partial pressure measuring device incorporating an automatic sensor calibration device; Standard gas inlet / outlet and air inlet / outlet for air for oxygen partial pressure value verification
B. a sensor mounting portion including a sensor chamber having a hole and a sensor pressing plate; B. a standard mixed gas supply device which comprises a standard mixed gas-1 cylinder, a standard mixed gas-2 cylinder, and an electromagnetic valve and sends each standard mixed gas to the sensor mounting chamber; B. a control circuit for controlling ON / OFF of the calibration device and opening / closing of the solenoid valve; Oxygen partial pressure value and diacid during sending standard mixture gas
Carbon divided voltage value, the oxygen partial pressure of the sensor of the mixed gas and
Receives an electric signal of the carbon dioxide partial pressure value and indicates the mixed gas
Deviation from the standard setting value to be set, and oxygen when air is flowed
If the deviation of the partial pressure value from the standard setting value is outside the allowable range
An arithmetic circuit for automatic calibration ; An automatic calibration device for a transcutaneous oxygen / carbon dioxide partial pressure measuring device sensor, comprising a display circuit for displaying each gas partial pressure value by an electric signal from the arithmetic circuit, and an automatic sensor for the sensor using this device. A calibration method is provided.
【０００７】本発明装置を図面に基いて説明する。図１
は本装置の装置系統図で、ガス−１のボンベ１，ガス−
２のボンベ２は、それぞれ電磁弁３，電磁弁４を介して
センサ載置部５のセンサチャンバ６に通じている。セン
サ載置部のセンサチャンバ６の上縁部はセンサ底面に対
応した水平枠を形成し、センサ２１を水平に載置保持す
る。センサチャンバは上記標準ガス入，排出口の他、酸
素分圧値検定用空気の入，排出用の空気導通孔７が設け
られ標準ガスを用いないときはセンサチャンバには空気
が導入される。センサ押圧板８は、マイクロスイッチ９
と連動し一端縁を軸として回動し、センサを載置し押圧
板８で押圧することにより、制御回路１０により自動較
正装置の電気回路を閉じ、較正装置が起動する。The apparatus of the present invention will be described with reference to the drawings. FIG.
Is a system diagram of the present apparatus.
The two cylinders 2 communicate with the sensor chamber 6 of the sensor mounting part 5 via the electromagnetic valves 3 and 4, respectively. The upper edge of the sensor chamber 6 of the sensor mounting portion forms a horizontal frame corresponding to the sensor bottom surface, and mounts and holds the sensor 21 horizontally. Sensor chamber is the standard gas inlet, other outlet, acid
Air inlet holes 7 for introducing and discharging air for elementary partial pressure value verification are provided, and when no standard gas is used, air is introduced into the sensor chamber. The sensor pressing plate 8 includes a micro switch 9
When the sensor is mounted and pressed by the pressing plate 8, the electric circuit of the automatic calibration device is closed by the control circuit 10, and the calibration device is activated.
【０００８】制御回路１０はセンサ載置部と連動し較正
装置の起動，終了を行なうとともに較正プログラムによ
る演算回路１１からの指令により電磁弁３，４の開閉を
行ない、センサチャンバへの標準ガス送入，停止を行な
う。センサ載置部に挟挿保持されたセンサ２１の酸素分
圧値，二酸化炭素分圧値の出力電気信号は増幅器１２を
経て演算回路１１に送られ、演算回路では各ガス分圧の
設定値と比較演算し、設定値の許容範囲を外れるとき
は、制御回路に標準ガスの送入を指示し、標準ガスによ
る自動較正を行なう。表示回路１３は酸素分圧値及び二
酸化炭素分圧値を経時表示する。The control circuit 10 starts and ends the calibration device in conjunction with the sensor mounting portion, and opens and closes the solenoid valves 3 and 4 according to a command from the arithmetic circuit 11 according to the calibration program, and sends the standard gas to the sensor chamber. On and off. The output electric signals of the oxygen partial pressure value and the carbon dioxide partial pressure value of the sensor 21 inserted and held in the sensor mounting portion are sent to the arithmetic circuit 11 via the amplifier 12, where the set value of each gas partial pressure and When the comparison operation is performed and the set value is out of the allowable range, the control circuit is instructed to supply the standard gas, and the automatic calibration using the standard gas is performed. The display circuit 13 displays the oxygen partial pressure value and the carbon dioxide partial pressure value over time.
【０００９】次に、本装置を用いた自動較正方法につい
て説明する。装置に組み込まれた自動較正プログラムは
較正開始初期のセンサ出力不安定期にはガス−１による
酸素 及び二酸化炭素分圧値の較正、必要によりさらにガ
ス−２による二酸化炭素分圧値の二点較正を行ない短時
間間隔の繰り返しスケジュール的に作動ガスをガス−１
とし、較正ガス分圧値安定後，作動ガスを空気に切り換
え、空気による酸素ガス分圧値を検定し、許容範囲外の
場合、ガス−１による較正後作動ガスを空気とし、空気
切換え後、所定時間を経て当初の較正開始時と同じく標
準混合ガス−１及び標準混合ガス−２によって更めて較
正を実施するサイクルに構成されている。具体的設定プ
ログラムの概略は次の通りである。Next, an automatic calibration method using the present apparatus will be described. The automatic calibration program built into the device uses gas-1 during the unstable sensor output period at the beginning of calibration.
Calibration of the partial pressures of oxygen and carbon dioxide and , if necessary, two-point calibration of the partial pressure of carbon dioxide with gas-2 are performed, and the working gas is repetitively scheduled for a short time at gas-1.
After the calibration gas partial pressure value is stabilized, the working gas is switched to air, and the oxygen gas partial pressure value due to air is verified. If it is out of the allowable range, the working gas after calibration with gas-1 is set to air, and after the air is switched, same standard as the original calibration at the start after a predetermined time
Compare again with semi-mixed gas-1 and standard mixed gas-2
It is configured to have a cycle of performing a positive . The outline of the specific setting program is as follows.
【００１０】ステップ１． センサ２１をセンサ載置部
５に水平に載置しセンサ押圧板で押圧することにより、
ガス−１による較正が開始される。続いてガス−２によ
る較正を行なう自動二点較正からスタートする。この始
動段階ではセンサは極めて不安定であるので、短時間の
中にこの操作を繰り返す。ステップ２． ステップ１で
二酸化炭素分圧値が許容範囲外ならば、ガス−２による
較正を行なったのち、作動ガスをガス−１に切り換え
て、短時間間隔でガス−１のみによるチェックを自動ス
ケジュール的に繰り返し、酸素分圧値が許容範囲外なら
ば自動較正後、自動的にガス−２によるチェックを行な
い、必要あれば較正する。ステップ３． ステップ２か
ら所定時間経過しセンサ出力値安定後、酸素分圧値をチ
ェックし、酸素ガス分圧値が許容範囲内ならば作動ガス
を空気に切り換えステップ４に移行する。作動ガスであ
る空気の酸素分圧値が以後表示されることとなる。ステ
ップ３で、酸素分圧値が許容範囲外ならばガス−１によ
る較正後、作動ガスを空気に切り換える。空気での酸素
分圧値の表示が許容範囲外まで変化したらその都度、ガ
ス−１による較正が行われ再び空気作動が続けられる。
ステップ４． 空気に切換えて所定時間経過してセンサ
の感度が安定し、センサを何時でも使用できる状態で維
持することが可能となった時点以後、ステップ３と並行
してやや長時間間隔（３０分〜６０分）で、定期的に自
動チェックをすることを目的として酸素及び二酸化炭素
分圧値をチェックする。このチェックは空気をその都
度、ガス−１に切り換えた後に行なうが、その酸素分圧
値及び二酸化炭素分圧値が許容範囲内ならば、再び空気
を流して置換し、センサの維持状態を続け、プログラム
に従って時間の到来とともにこの作業を繰り返す。ステ
ップ５．ステップ４で酸素ガス分圧値が許容範囲外なら
ば、ガス−１による較正を行なうために、暫く自動的に
ガス−１を流した後、チェックし較正後、必要あれば、
標準混合ガス−２による較正まで併せて行ない、再び空
気作動に戻す。較正が必要なければ直ちに空気作動に戻
す。ステップ６． 一定時間（４時間〜８時間）上記ス
テップ５が行われた後、再び当初の較正開始時の標準混
合ガス−１及び標準混合ガス−２による較正の実施に戻
る。なお、較正開始後の初期期間はセンサ出力値が不安
定の場合が多く、ステップ３における酸素分圧値のチェ
ックを例えば１分後，次の５分後等短時間間隔で再度ス
ケジュール的に繰り返すことが好ましい。Step 1. Sensor 21 as sensor mounting part
5 is placed horizontally and pressed by the sensor pressing plate,
Calibration with gas-1 is started. Subsequently, the process is started from an automatic two-point calibration for performing calibration using gas-2. Since the sensor is extremely unstable at this start-up stage, this operation is repeated within a short time. Step 2. If the partial pressure of carbon dioxide is out of the allowable range in step 1, the calibration using gas-2 is performed, and then the working gas is switched to gas-1. Repeatedly, if the oxygen partial pressure value is out of the allowable range, after the automatic calibration, the gas-2 is automatically checked and, if necessary, the calibration is performed. Step 3. After a predetermined time has passed from step 2 and the sensor output value has stabilized, the oxygen partial pressure value is checked. If the oxygen gas partial pressure value is within the allowable range, the working gas is switched to air and the process proceeds to step 4. Working gas
The oxygen partial pressure value of the air will be displayed thereafter. Stay
In step 3, if the oxygen partial pressure value is out of the allowable range, the working gas is switched to air after calibration with gas-1. Oxygen in the air
Whenever the display of the partial pressure value changes outside the allowable range,
The calibration is performed according to S-1 and the air operation is continued again.
Step 4 . Is switched to the air sensitivity of the sensor is stabilized with the lapse of a predetermined time, the time after which it is possible to maintain a state capable of using the sensor at any time, in parallel with Step 3
In was somewhat long time intervals (30 min to 60 min), oxygen and carbon dioxide for the purpose of periodically autocheck
Check the partial pressure value . This check each time the air is performed after switching to gas -1, its oxygen partial pressure
If the value and the partial pressure of carbon dioxide are within the allowable range, the air is replaced again to replace the air, the maintenance state of the sensor is continued, and this operation is repeated as time comes according to the program. Stay
5. If the oxygen gas partial pressure value is out of the permissible range in step 4 , the gas-1 is automatically flowed for a while to perform the calibration with the gas-1, then checked and calibrated .
The calibration is performed together with the standard gas mixture-2, and the operation is returned to the pneumatic operation again. Return to pneumatic operation immediately if calibration is not required. Step 6. For a certain period of time (4 to 8 hours)
After step 5, the standard mix at the beginning of the initial calibration is again
Return to calibration with gas-1 and standard gas mixture-2
You. In many cases, the sensor output value is unstable during the initial period after the start of calibration, and the check of the oxygen partial pressure value in step 3 is repeated in a short time interval, for example, one minute, the next five minutes, and the like. Is preferred.
【００１１】なお、上記ステップ３〜６の作動ガスを空
気によらず、すべて酸素分の多い標準混合ガス（ガス−
１）を用いてもよいことは勿論である。この場合にもガ
ス−２による二点チェックは、ガス−１によるチェック
が許容範囲内ならば省略され、経済的な維持運転に寄与
することは当然である。Note that the working gas in the above steps 3 to 6 is a standard mixed gas (gas-
It goes without saying that 1) may be used. Also in this case, the two-point check with gas-2 is omitted if the check with gas-1 is within an allowable range, and it naturally contributes to economical maintenance operation.
【００１２】[0012]
【作用】本発明によれば、センサチャンバに空気導通孔
及び標準ガス入，排出ラインを設けることにより、較正
開始後初期の不安定期間には標準ガスにより較正を行な
うが、以後の安定期には従来行われなかった空気による
チェックが行われ、その後標準ガスにより較正開始プロ
セスに戻るので、再度標準ガスによる較正が行われ、空
気チェックによるセンサ精度への影響はなく、センサを
長期に亘り使用状態に保持することが可能である。更に
ガス−１，ガス−２の消費を節減できる。また、二酸化
炭素分圧値は酸素分圧値の変動に比して遥かに緩やかに
変動する事実を利用し、ガス−１による較正時の二酸化
炭素分圧値が許容範囲内であればガス−２による較正を
省き較正プロセスを簡単にし、ガス−２の消費を節約で
きる。経皮酸素・二酸化炭素分圧測定装置のように小型
移動式の機器に於いてはガスボンベの占める容積率を大
きくとることが出来ず、ガスの消費速度は取替え頻度と
相まって看護作業の上で重要な意味を持つ。センサはセ
ンサチャンバ上に水平に保持され押圧板間に保持される
ので、載置部から外れ落ちて損傷する恐れがない。さら
に押圧板間に挟挿すればセンサの較正プロセスが開始さ
れ、他の操作を必要としない。According to the present invention, by providing an air communication hole and a standard gas inlet / outlet line in the sensor chamber, the calibration is performed with the standard gas during the initial unstable period after the start of the calibration, but in the subsequent stable period. Is checked by air, which has not been done before, and then returns to the calibration start process using standard gas.Therefore, calibration is performed again using standard gas, and the air check does not affect the sensor accuracy and the sensor can be used for a long time. It is possible to keep it in a state. Further, the consumption of gas-1 and gas-2 can be reduced. The fact that the carbon dioxide partial pressure value fluctuates much more slowly than the oxygen partial pressure value utilizes the fact that the carbon dioxide partial pressure value at the time of calibration with gas-1 is within an allowable range. 2 simplifies the calibration process and saves gas-2 consumption. In small mobile devices such as transcutaneous oxygen / carbon dioxide partial pressure measuring devices, the volume ratio occupied by gas cylinders cannot be made large, and the gas consumption rate is important for nursing work in conjunction with the frequency of replacement. Has meaning. Since the sensor is held horizontally on the sensor chamber and held between the pressing plates, there is no possibility that the sensor will fall off the mounting portion and be damaged. Further insertion between the pressure plates initiates the sensor calibration process and requires no further operation.
【００１３】[0013]
【発明の効果】本発明によれば、自動較正の開始操作が
非常に簡単であり、高価な標準混合ガス−１，ガス−２
の消費を大幅に節約し長期間に亘りセンサを即時使用可
能状態に保持することができる。事実、本発明の装置を
用いて標準混合ガスの消費量を１／２〜１／４に縮小す
ることが出来た。さらにセンサ載置部からセンサが外れ
破損する恐れがない。According to the present invention, the starting operation of the automatic calibration is very simple, and the expensive standard mixed gas-1, gas-2
And the sensor can be kept ready for a long period of time. In fact, it was possible to reduce the consumption of the standard mixed gas by a factor of 2 to 1/4 using the device according to the invention. Further, there is no possibility that the sensor is detached from the sensor mounting portion and is damaged.
【図１】本発明に係るセンサ自動較正装置の装置系統図
である。FIG. 1 is an apparatus system diagram of an automatic sensor calibration apparatus according to the present invention.
１ ガス−１ボンベ ２ ガス−２ボンベ ３ 電磁弁 ４ 電磁弁 ６ センサチャンバ ７ 空気導通孔 ８ センサ押圧板 ９ マイクロスイッチ １０ 制御回路 １１ 演算回路 １３ 表示回路 ２１ センサ DESCRIPTION OF SYMBOLS 1 Gas-1 cylinder 2 Gas-2 cylinder 3 Solenoid valve 4 Solenoid valve 6 Sensor chamber 7 Air conduction hole 8 Sensor pressing plate 9 Micro switch 10 Control circuit 11 Arithmetic circuit 13 Display circuit 21 Sensor
Claims (2)
素・二酸化炭素分圧測定装置において；該自動較正装置
はＡ．標準ガス入，排出口及び酸素分圧値検定用空気の
入，排出用の空気導通孔を有するセンサチャンバ及びセ
ンサ押圧板からなるセンサ載置部，Ｂ．標準混合ガス−
１ボンベ，標準混合ガス−２ボンベ，電磁弁からなり前
記センサ載置チャンバに各標準混合ガスを送る標準混合
ガス供給装置，Ｃ．較正装置のオン、オフ及び前記電磁
弁を開閉制御する制御回路，Ｄ．標準混合ガスを送流中
の酸素分圧値及び二酸化炭素分圧値が、該混合ガスのセ
ンサの酸素分圧値及び二酸化炭素分圧値の電気信号を受
け、該混合ガスが示すべき標準設定値からの乖離、及び
空気を流した際の酸素分圧値の前記標準設定値からの乖
離が許容範囲外ならば自動較正する演算回路，Ｅ．前記
演算回路からの電気信号により各ガス分圧値を表示する
表示回路からなることを特徴とする経皮酸素・二酸化炭
素分圧測定装置センサの自動較正装置。 1. A transcutaneous oxygen / carbon dioxide partial pressure measuring device having a built-in automatic calibration device for a sensor; Standard gas inlet, outlet and air for oxygen partial pressure
B. a sensor mounting portion including a sensor chamber having an air passage hole for inlet and outlet and a sensor pressing plate; Standard gas mixture
B. a standard mixed gas supply device comprising one cylinder, a standard mixed gas-2 cylinder, and an electromagnetic valve for sending each standard mixed gas to the sensor mounting chamber; B. a control circuit for controlling ON / OFF of the calibration device and opening / closing of the solenoid valve; Sending standard mixed gas
The oxygen and carbon dioxide partial pressure values of
Receiving electric signals of the oxygen partial pressure and carbon dioxide
Deviation from the standard set value that the mixed gas should indicate, and
Deviation of the oxygen partial pressure value from the standard setting value when air is flowed
An arithmetic circuit for automatically calibrating if the separation is out of the allowable range ; An automatic calibration device for a transcutaneous oxygen / carbon dioxide partial pressure measuring device sensor, comprising a display circuit for displaying each gas partial pressure value by an electric signal from the arithmetic circuit.
始初期のセンサ出力不安定期に標準混合ガス−１及び標
準混合ガス−２によりセンサ分圧値の較正を行ない、引
続き作動ガスを標準混合ガス−１として較正し、酸素分
圧値安定後、作動ガスを空気に切り換え、空気による酸
素分圧値を表示検定し、検出値と前記標準混合ガス−１
の酸素分圧値との差が許容範囲外に至った場合、及び定
期的に標準混合ガス−１による較正と必要とあれば標準
混合ガス−２による較正後、再度作動ガスを空気とする
検定操作を続行し、所定時間経過後、再び当初の較正開
始時の標準混合ガス−１及び標準混合ガス−２による較
正の実施に戻るように自動制御することを特徴とする経
皮酸素・二酸化炭素分圧測定装置センサの自動較正方
法。 2. The sensor automatic calibration device is used to calibrate the sensor partial pressure value with the standard mixed gas-1 and the standard mixed gas-2 during the unstable period of the sensor output at the initial stage of the calibration. After the oxygen partial pressure was stabilized, the working gas was switched to air, the oxygen partial pressure due to air was displayed and verified, and the detected value was compared with the standard mixed gas-1.
If the difference from the oxygen partial pressure of
Calibration with standard gas mixture-1 periodically and standard if necessary
After calibration with mixed gas-2, the working gas is changed to air again
The calibration operation is continued, and after the elapse of a predetermined time, the initial calibration
Comparison between the initial standard gas mixture-1 and standard gas mixture-2
A method for automatically calibrating a sensor of a transcutaneous oxygen / carbon dioxide partial pressure measuring device, characterized by automatically controlling to return to a positive operation .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4185747A JP2593389B2 (en) | 1992-06-22 | 1992-06-22 | Automatic calibration device and automatic calibration method for transcutaneous oxygen / carbon dioxide partial pressure measuring device sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4185747A JP2593389B2 (en) | 1992-06-22 | 1992-06-22 | Automatic calibration device and automatic calibration method for transcutaneous oxygen / carbon dioxide partial pressure measuring device sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06175A JPH06175A (en) | 1994-01-11 |
| JP2593389B2 true JP2593389B2 (en) | 1997-03-26 |
Family
ID=16176157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4185747A Expired - Lifetime JP2593389B2 (en) | 1992-06-22 | 1992-06-22 | Automatic calibration device and automatic calibration method for transcutaneous oxygen / carbon dioxide partial pressure measuring device sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2593389B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4464247A1 (en) * | 2023-05-16 | 2024-11-20 | SenTec AG | Calibration and/or verification tool |
| CN119335146B (en) * | 2024-12-23 | 2025-03-18 | 山西开成检测股份有限公司 | Calibrating device for gas sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62126969A (en) * | 1985-11-26 | 1987-06-09 | Agency Of Ind Science & Technol | Streptomyces tuirus |
| EP0355896A3 (en) * | 1988-08-10 | 1990-09-12 | INSTRUMENTATION LABORATORY S.p.A. | Method, apparatus and solution for calibration of partial pressure value |
| JPH0627242Y2 (en) * | 1989-07-06 | 1994-07-27 | 株式会社阪村機械製作所 | Homer cutting mechanism |
-
1992
- 1992-06-22 JP JP4185747A patent/JP2593389B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06175A (en) | 1994-01-11 |
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