JPS6241028B2 - - Google Patents
Info
- Publication number
- JPS6241028B2 JPS6241028B2 JP56124822A JP12482281A JPS6241028B2 JP S6241028 B2 JPS6241028 B2 JP S6241028B2 JP 56124822 A JP56124822 A JP 56124822A JP 12482281 A JP12482281 A JP 12482281A JP S6241028 B2 JPS6241028 B2 JP S6241028B2
- Authority
- JP
- Japan
- Prior art keywords
- drip
- slit
- output
- mask plate
- infusion
- 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
Links
- 238000001802 infusion Methods 0.000 claims description 46
- 108091008695 photoreceptors Proteins 0.000 claims description 32
- 238000012544 monitoring process Methods 0.000 claims description 24
- 238000010999 medical injection Methods 0.000 claims description 13
- 238000001990 intravenous administration Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 description 14
- 239000007924 injection Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000005484 gravity Effects 0.000 description 6
- 230000001186 cumulative effect Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 2
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 108020003175 receptors Proteins 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 238000001595 flow curve Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
【発明の詳細な説明】
(1) 技術分野
この発明は、点滴筒内の点滴状態を光学的に
検出し電気信号の大小に変換した後、点滴状態
を滴下なし連続流下の二種類に判別して輸液量
の監視または／および制御ができ、また点滴量
表示器の表示数量を読取れば滴下なしについて
も判別できる医療用注入装置に関する。[Detailed Description of the Invention] (1) Technical field This invention optically detects the drip state in the drip tube, converts it into the magnitude of an electrical signal, and then distinguishes the drip state into two types: no drip and continuous flow. The present invention relates to a medical infusion device that can monitor and/or control the amount of infusion by using a drip amount indicator, and can also determine if there is no infusion by reading the amount displayed on an infusion amount display.
(2) 背景技術
患者に静脈を通して治療溶液を供給すること
がしばしば必要になるが、この処置を実行する
にあたつては液体の供給速度が知られかつ制御
可能であるということが常に重要である。特
に、生理学的な作用をする物質が投与される場
合には、投与速度が大きくなることは大変危険
であり、投与速度は予め定められた速度に制御
可能でなければならない。(2) Background Art It is often necessary to deliver therapeutic solutions intravenously to a patient, and it is always important when performing this procedure that the rate of fluid delivery is known and controllable. be. Particularly when a substance with a physiological effect is administered, it is very dangerous to increase the rate of administration, and the rate of administration must be controllable to a predetermined rate.
そこで、医療用注入装置は第１図に示すよう
に注入びん１と、これに接続された点滴筒２を
有する注入管３と、点滴筒２内の点滴の落下経
路に交差して互いに対向するように配された点
滴状態を検出し電気信号に出力する発光体４お
よび受光体５と、注入管３を開閉する点滴バル
ブ６または注入管３をしごくローラー式もしく
はフインガー式のポンプ７と、受光体５の出力
電気信号を演算処理して点滴量表示器８に点滴
量表示信号を出力するとともに上記点滴バルブ
６またはポンプ７を患者への注入速度が一定で
かつ点滴量が所定値を越えないように制御する
点滴状態監視回路９を備え、上記受光体５の直
前にスリツトを有するマスク板１０を備えて成
る。そして点滴バルブ６を備える医療用注入装
置によれば、点滴速度は重力の作用下で予め選
ばれた流速になり点滴量が所定値を越えると点
滴状態監視回路９によつて点滴バルブ６が注入
管３をやや絞るように成つている。また、ポン
プ７を備える医療用注入装置は点滴速度および
点滴量が点滴状態監視回路９によつて制御され
るポンプ７の回転により決定される。 Therefore, as shown in FIG. 1, the medical infusion device includes an infusion bottle 1, an infusion tube 3 having an infusion tube 2 connected to the infusion bottle 1, and an infusion tube 3 that faces each other and intersects with the falling path of the drip in the infusion tube 2. A light emitter 4 and a photoreceptor 5 detect the state of the infusion arranged in the same way and output it as an electrical signal, an infusion valve 6 that opens and closes the injection tube 3 or a roller-type or finger-type pump 7 that squeezes the injection tube 3, and a light-receiving device. It calculates and processes the output electrical signal of the body 5 and outputs a drip amount display signal to the drip amount display 8, and also operates the drip valve 6 or pump 7 so that the injection rate into the patient is constant and the drip amount does not exceed a predetermined value. The device is equipped with a drip state monitoring circuit 9 for controlling the drip status, and a mask plate 10 having a slit just in front of the photoreceptor 5. According to the medical injection device equipped with the drip valve 6, the drip speed becomes a pre-selected flow rate under the action of gravity, and when the drip volume exceeds a predetermined value, the drip status monitoring circuit 9 causes the drip valve 6 to inject the drip. The tube 3 is configured to be slightly constricted. Further, in a medical injection device equipped with a pump 7, the drip speed and amount are determined by the rotation of the pump 7, which is controlled by the drip status monitoring circuit 9.
しかるに、上記のいずれの構造の注入装置に
おいても、受光体５の直前に設けられるマスク
板１０のスリツト１１は第２図に示すように横
長矩形となつており、このため第３図ａ，ｂ，
ｃにそれぞれ示すように滴下なし、滴下あり、
連続流下の三様の光量変化が十分に得られず、
受光体５の出力電気信号は、第４図ａ，ｂ，ｃ
にそれぞれ対応して示す値となり、滴下ありと
連続流下の場合の差は殆んどないことにより両
者の判別は不能である。もつとも、滴下の間隔
を計測して輪理処理する等の複雑な方法を用い
れば可能である。 However, in any of the above injection devices, the slit 11 of the mask plate 10 provided immediately in front of the photoreceptor 5 has a horizontally long rectangular shape as shown in FIG. ，
No dripping, dripping, as shown in c, respectively.
Three types of light intensity changes under continuous flow could not be obtained sufficiently,
The output electrical signals of the photoreceptor 5 are as shown in Fig. 4 a, b, c.
Since there is almost no difference between the cases with dripping and the case with continuous flow, it is impossible to distinguish between the two. However, it is possible to do so by using a complicated method such as measuring the interval between drops and performing ring treatment.
また、第１図における点滴状態監視回路９
は、第２図にその構成を具体的に示すように、
増幅器１２と、比較器１３と、比較器１３の域
値を設定するための抵抗器１４と、計数器１５
と、および制御回路１６とから成り、この構成
によれば、仮に受光体５で受光量変化を滴下な
し、滴下あり、連続流下の三様に分けて検出し
電圧もしくは電流の大小の電気信号として出力
できたとしても、滴下ありと連続流下の相違を
読み取れる構成となつておらず、したがつて連
続流下の場合に比較器１３、計数器１５、制御
回路１６が正確に対応できず、患者への輸液の
注入速度、注入量が制御不能になり生命が大変
な危険に晒されることになる。 In addition, the drip status monitoring circuit 9 in FIG.
As the configuration is specifically shown in Figure 2,
An amplifier 12, a comparator 13, a resistor 14 for setting the threshold value of the comparator 13, and a counter 15
, and a control circuit 16. According to this configuration, if the photoreceptor 5 detects changes in the amount of light received in three ways: no dripping, dripping, and continuous flow, it is detected as an electrical signal of the magnitude of voltage or current. Even if the output is possible, the structure is not configured to read the difference between dripping and continuous flow, and therefore the comparator 13, counter 15, and control circuit 16 cannot respond accurately in the case of continuous flow, and the patient The infusion speed and volume of the infusion become uncontrollable, putting lives at great risk.
以上のことから、従来の医療用注入装置で解
決すべき課題は、一つは、点滴筒２内の点滴状
態を検出するセンサーを点滴あり、連続流下の
二様の実用的な電気信号が得られるように改良
することであり、もう一つは、点滴状態監視回
路を上記センサーから出力される二様の電気信
号を点滴あり、連続流下のいずれであるか確
実・正確に判別し、点滴量表示器８および点滴
バルブ６またはロータリー式もしくはフインガ
ー式のポンプ７に対して制御信号を出力できる
ように改良し、また点滴量表示器に表示を読取
れば点滴なしも判別できるように改良すること
にある。 Based on the above, the problems that need to be solved with conventional medical infusion devices are: One is that the sensor for detecting the state of drip in the drip tube 2 is attached to the drip, and it is possible to obtain two types of practical electrical signals during continuous flow. The other is to improve the infusion status monitoring circuit to reliably and accurately determine whether an infusion is present or continuous flow from the two types of electrical signals output from the above sensor, and to determine the amount of infusion. To be improved so that a control signal can be output to the display 8 and the drip valve 6 or the rotary or finger type pump 7, and also to be able to determine whether there is no drip by reading the display on the drip amount display. It is in.
(3) 発明の開示
この発明は、点滴状態を検出するセンサーを
コスト高にならないよう従来と同様に発光体と
受光体とから成るものとして変えず、受光体の
受光量が滴下なし、滴下あり、連続流下に十分
に対応して判別し得る相対比率となる改良され
たマスク板を備えることで実質的に検出機能の
向上したセンサーを得るとともに、従来の点滴
状態監視回路をコスト高とならないよう従来の
基本的な構成を特に変えることなくこれに付加
して回路構成を簡素に維持し、しかもセンサー
から出力される電気信号を滴下あり、連続流下
の二様に確実・正確に判別し制御信号を出力で
き、また点滴量表示器を読取れば滴下なしも判
別できる医療用注入装置を提供することを第１
の目的としている。(3) Disclosure of the Invention This invention does not change the sensor for detecting the state of dripping to be made up of a light emitter and a photoreceptor as in the past in order to avoid high costs, and the amount of light received by the photoreceptor can be adjusted to determine whether there is no dripping or if there is dripping. By providing an improved mask plate with a relative ratio that is sufficiently compatible with continuous flow and can be discriminated, a sensor with substantially improved detection capability is obtained, and the cost of conventional drip status monitoring circuitry is eliminated. The circuit configuration is kept simple by adding it to the conventional basic configuration without any particular changes, and it is possible to reliably and accurately distinguish the electric signal output from the sensor into two types, dripping and continuous flow, and control the signal. Our first objective is to provide a medical infusion device that can output a drip amount and also determine whether or not a drip is being dripped by reading the drip amount indicator.
The purpose is to
この目的は、この発明によれば、点滴筒に取
付けて点滴状態を検出し電気信号に変換して出
力する点滴状態検出器と、この検出器の出力信
号を演算処理して点滴状態を監視または／およ
び制御する点滴状態監視回路と、この点滴状態
監視回路に設けられた単位時間当りの点滴数を
計数する計数器の出力を表示する点滴量表示器
とを備え、上記点滴状態検出器は点滴筒内の点
滴の落下経路に光軸線を交差して互いに向き合
う発光体および受光体と、この受光体の直前に
備えるスリツトを有するマスク板とから成る医
療用注入装置において、上記マスク板のスリツ
トは上記受光体に少くとも１滴の点滴の縦長寸
法より長い縦長光量が入射する大きさであり、
他方上記点滴状態監視回路は２つの域値を設け
て上記点滴状態検出器で得られる出力電気信号
をその大小内容に応じて滴下あり、連続流下の
二様に判別する判別回路を有し、また滴下なし
を前記点滴量表示器により判別できることを特
徴とする医療用注入装置によつて達成される。 According to the present invention, the purpose is to provide a drip status detector that is attached to a drip tube to detect the drip status, convert it into an electrical signal, and output it, and a drip status detector that monitors or monitors the drip status by processing the output signal of this detector. / and a drip status monitoring circuit for controlling the drip status, and a drip amount display for displaying the output of a counter provided in the drip status monitoring circuit for counting the number of drips per unit time, and the drip status detector is In a medical injection device comprising a light emitter and a light receptor facing each other with their optical axes intersecting the falling path of the drip in the cylinder, and a mask plate having a slit provided just in front of the light receptor, the slit in the mask plate is The size is such that an amount of vertical light that is longer than the vertical dimension of at least one drip is incident on the photoreceptor,
On the other hand, the above-mentioned drip status monitoring circuit has a discrimination circuit which sets two threshold values and discriminates the output electric signal obtained by the above-mentioned drip status detector into two types, depending on the size of the output electric signal, whether it is dripping or continuous flow. This is achieved by a medical injection device characterized in that non-dropping can be determined by the drip amount indicator.
この考案は、上述した目的の他に、点滴筒が
傾いてセツトされ点滴が点滴筒の筒心を外れて
重力落下する場合にも有効に判別検出できるセ
ンサーを備えた医療用注入装置を提供すること
を第２の目的としている。 In addition to the above-mentioned purpose, this invention provides a medical infusion device equipped with a sensor that can effectively discriminate and detect when the drip tube is set at an angle and the drip falls off the center of the tube due to gravity. This is the second purpose.
この第２の目的は、この考案によれば、マス
ク板のスリツトを受光体に少なくとも１滴の点
滴の縦長寸法より長い縦長光量が入射する大き
さ、即ち所要の縦長矩形にした場合では対応で
きないので、マスク板のスリツトを横長に切欠
いた部分に相当するスリツト水平部と、このス
リツト水平部より上方へ切欠いた部分に相当す
るスリツト垂直部とこれらのスリツト水平部と
スリツト垂直部の交わるコーナーを大きく丸味
を付けるように切欠いた部分に相当するスリツ
トコーナー部とから成る形状、好ましくは略逆
Ｔ字形もしくは略Ｌ字形等とし、さらに好まし
くは点滴の径に対応してスリツトの各辺の寸法
比率を一定に抑えることによつて達成できる。 According to this invention, this second purpose cannot be achieved by making the slit of the mask plate large enough to allow a vertically long light amount longer than the vertical dimension of at least one infusion to enter the photoreceptor, that is, the required vertically long rectangular shape. Therefore, the slit horizontal part corresponds to the horizontally long notched part of the slit on the mask plate, the slit vertical part corresponds to the part cut upward from this slit horizontal part, and the corner where these slit horizontal part and slit vertical part intersect. The shape consists of a slit corner portion corresponding to a large rounded notch, preferably approximately an inverted T-shape or approximately L-shape, and more preferably, the dimensions of each side of the slit correspond to the diameter of the infusion. This can be achieved by keeping the ratio constant.
(4) 考案を実施するための最良の形態
(4‐1) 構 成
この考案の医療用注入装置の実施例は、第
５図を示すように、図示しない注入びんに点
滴筒２を有する注入管３が接続され、点滴筒
２に取付けて点滴状態を検出し電気信号に変
換して出力する点滴状態検出センサーが、点
滴筒２内の点滴の落下経路に光軸線を交差し
て互いに向き合う発光ダイオード等の発光体
４およびフオトトランジスタ等の受光体５
と、この受光体５の直前に備えるスリツト１
１を有するマスク板１０とから成つており、
注入管３には該注入管３を絞る点滴バルブ６
または注入管３をしごくローラー式もしくは
フインガー式のポンプ７を備えており、さら
に上記受光体５の出力電気信号を演算処理し
て点滴量表示器８に点滴量表示信号を出力す
るとともに上記点滴バルブ６またはポンプ７
を患者への注入速度が一定でかつ発光量が所
定値を越えないように制御する点滴状態監視
回路９Ａを備えて構成されている。上記マス
ク板１０のスリツト１１は上記受光体５に少
なくとも一滴の点滴の縦長寸法より長い縦長
光量が入射する大きさとされ、好ましい大き
さとしては、スリツト１１はその横幅Ｗを第
６図ｂに示すように一滴の点滴の直径ｄと略
等しくし、またその縦幅Ｌを一滴の点滴の直
径ｄの1.5倍ないし３倍としてある。またス
リツト１１と点滴ノズルとの距離ｈは点滴ノ
ズルの直径よりも大きくとつてある。スリツ
ト１１を従来の横長から縦長に変えるのは、
滴下なしと滴下ありの判別ができるだけでな
くさらに滴下ありと連続流下の異なる点滴状
態を誤まりなく有効に判別できるように受光
体５の受光量の比率を大きくするためであ
る。実験によれば、スリツト１１の横幅Ｗを
点滴の直径ｄと略等しくし、および縦幅Ｌを
点滴の直径ｄの1.5倍ないし３倍とすること
が点滴状態を誤まりなく有効に判別できる受
光量の比率が得られる。他方、上記点滴状態
監視回路９Ａは、第２図に示す従来の点滴状
態監視回路９と比較すると、２つの域値を設
けて上記受光体５で得られる出力電気信号を
その大小内容に応じて滴下あり、連続流下の
三様に判別する判別回路１７を有しているこ
とが相違している。２つの比較器（例えば、
コンパレーター）１３Ａ，１３Ｂは増幅器１
２の出力側に並列に接続されており、かつ抵
抗器１４Ａ，１４Ｂによつてそれぞれ異なる
電圧値ＶA，ＶBが域値として設定されてい
る。そして、一方の比較器１３Ａと計測器１
５との間にNOT回路１８およびAND回路１
９が直列に接続されかつAND回路１９の入
力側に他方の比較器１３Ｂも接続されてお
り、また比較器１３ＢはAND回路１９と並
列にNOR回路２０とも接続されており、さ
らにNOR回路２０はその入力側が一方の比
較器１３Ａと接続されかつその出力側が警報
器２０および制御回路１６に分岐接続されて
いる。そして上記比較器１３Ａは予め設定さ
れている域値ＶAより高いか、もしくは低い
増幅器１２からの出力信号を入力すると０も
しくは１の出力信号を出力するように成つて
いる。また、上記計数器１５はAND回路１
９からの出力信号を入力して単位時間当りの
点滴数を計数してそれに対応するパルス信号
を出力しかつ今までの計数をリセツトするよ
うに成つている。また上記制御回路１６は、
計数器１５の出力信号を入力してこれを予め
自身に所望に調整可能にプリセツトされた基
準値と比較しその偏差値に応じて該偏差値が
なくなるように点滴バルブ６またはポンプ７
をフイードバツク制御する制御信号を出力
し、さらに計数器１５の出力信号の累計が所
望の点滴量に対応する限界値に達したとき点
滴バルブ６を完全に閉鎖しまたはポンプ７を
停止する制御信号を出力するように成つてお
り、また制御回路１６はNOR回路２０から
の出力信号を入力するとき、上記計数器１５
からの出力信号を無視し、NOR回路２０か
らの出力信号に応答して点滴バルブ６を完全
に閉鎖しまたはポンプ７を停止する制御信号
を出力するように成つている。点滴量表示器
８は計数器１５からの出力信号を入力して単
位時間当りの点滴数もしくは点滴量、また
は／および累計点滴量をデジタル式もしくは
アナログ式に表示するように成つている。(4) Best mode for carrying out the invention (4-1) Configuration As shown in FIG. The tube 3 is connected, and the drip status detection sensor attached to the drip tube 2 detects the drip status, converts it to an electrical signal, and outputs it.The drip status detection sensor is attached to the drip tube 2 and emits light that faces each other across the optical axis line in the falling path of the drip in the drip tube 2. A light emitter 4 such as a diode and a light receiver 5 such as a phototransistor
and a slit 1 provided just in front of this photoreceptor 5.
1, and a mask plate 10 having a
The injection pipe 3 has a drip valve 6 that throttles the injection pipe 3.
Alternatively, it is equipped with a roller type or finger type pump 7 that squeezes the injection tube 3, and further processes the output electric signal of the photoreceptor 5 and outputs a drip amount display signal to the drip amount display 8, and also outputs a drip amount display signal to the drip amount display 8, and also outputs a drip amount display signal to the drip amount display 8. 6 or pump 7
The infusion state monitoring circuit 9A controls the infusion rate to the patient to be constant and the amount of light emitted so as not to exceed a predetermined value. The slit 11 of the mask plate 10 is sized so that a lengthwise light amount longer than the lengthwise dimension of at least one drip is incident on the photoreceptor 5, and as a preferable size, the slit 11 has a width W shown in FIG. 6b. In this way, the diameter d of one droplet is approximately equal to the diameter d, and the vertical width L is 1.5 to 3 times the diameter d of one droplet. Further, the distance h between the slit 11 and the drip nozzle is set larger than the diameter of the drip nozzle. Changing the slit 11 from the conventional horizontally long to vertically long one is as follows.
This is to increase the ratio of the amount of light received by the photoreceptor 5 so that it is possible to not only distinguish between no dripping and dripping, but also to effectively distinguish between different dripping states, such as dripping and continuous flow, without error. According to experiments, it has been found that making the width W of the slit 11 approximately equal to the diameter d of the drip, and setting the vertical width L to 1.5 to 3 times the diameter d of the drip allows light reception to effectively determine the drip status without error. A ratio of amounts is obtained. On the other hand, in comparison with the conventional drip status monitoring circuit 9 shown in FIG. 2, the drip status monitoring circuit 9A has two threshold values and adjusts the output electrical signal obtained from the photoreceptor 5 according to its magnitude. The difference is that it has a discrimination circuit 17 that discriminates between three types: dripping and continuous flow. Two comparators (e.g.
Comparator) 13A, 13B are amplifier 1
2, and different voltage values V A and V B are set as threshold values by resistors 14A and 14B, respectively. Then, one comparator 13A and measuring device 1
NOT circuit 18 and AND circuit 1 between
9 are connected in series, and the other comparator 13B is also connected to the input side of the AND circuit 19, and the comparator 13B is also connected to the NOR circuit 20 in parallel with the AND circuit 19. Its input side is connected to one comparator 13A, and its output side is branch-connected to the alarm 20 and the control circuit 16. The comparator 13A is configured to output an output signal of 0 or 1 when it receives an output signal from the amplifier 12 that is higher or lower than a preset threshold value VA . In addition, the counter 15 is an AND circuit 1
The output signal from 9 is input, the number of infusions per unit time is counted, a pulse signal corresponding to the number is outputted, and the counting up to now is reset. Further, the control circuit 16 is
The output signal of the counter 15 is inputted and compared with a reference value that is preset in advance so that it can be adjusted as desired, and the drip valve 6 or pump 7 is operated according to the deviation value so that the deviation value is eliminated.
It outputs a control signal for feedback control of the infusion valve 6 and further outputs a control signal to completely close the infusion valve 6 or stop the pump 7 when the cumulative total of the output signals of the counter 15 reaches a limit value corresponding to the desired infusion amount. When the control circuit 16 inputs the output signal from the NOR circuit 20, the control circuit 16 inputs the output signal from the counter 15.
It ignores the output signal from the NOR circuit 20 and outputs a control signal to completely close the drip valve 6 or stop the pump 7 in response to the output signal from the NOR circuit 20. The drip amount display 8 receives the output signal from the counter 15 and displays the number of drips per unit time, the drip amount, and/or the cumulative drip amount in a digital or analog format.
第６図ａ，ｂ，ｃはそれぞれ受光体５がマ
スク板１０のスリツト１１およびこのスリツ
ト１１を横切つて落下する点滴によつて制限
変化する受光量の比率を説明するための図で
あり、同図ａは滴下なしの状態でスリツト１
１の面積X1に制限された光線が受光体５に
受光されることを示し、同図ｂは滴下ありの
状態でスリツト１１の面積X1から点滴で塞
がれる面積X2を差引いた面積X1−X2に制限
された光線が受光体５に受光されることを示
し、同図ｃは連続流下の状態でスリツト１１
の面積X1が連続流の点滴でほとんど塞がれ
受光体５の受光量がきわめて小さいことを示
している。 FIGS. 6a, b, and c are diagrams for explaining the ratio of the amount of light received by the photoreceptor 5 that changes in a limited manner due to the slit 11 of the mask plate 10 and the drip that falls across the slit 11. Figure a shows slit 1 with no dripping.
This shows that a light beam limited to an area of 1 x 1 is received by the photoreceptor 5, and b in the figure shows the area obtained by subtracting the area x 2 of the slit 11 blocked by the drip from the area x 1 of the slit 11 in the state with dripping. This figure shows that the light beam limited to X 1 -X 2 is received by the photoreceptor 5.
The area X 1 is almost completely covered by the continuous drip, indicating that the amount of light received by the photoreceptor 5 is extremely small.
第７図ａ，ｂ，ｃはそれぞれ第６図ａ，
ｂ，ｃに対応するもので受光体５の出力信号
の変化を示すものである。 Figures 7a, b, and c are Figure 6a, respectively.
These correspond to b and c and show changes in the output signal of the photoreceptor 5.
第８図ａないしｆは点滴状態監視回路９Ａ
で処理される電気信号を示し、同図ａは増幅
器１２で増幅された三様の点滴状態に対応す
る電気信号を示し、同図ｂは比較器１３Ａの
出力信号を示し、該信号は滴下なしのため受
光量が最大のときに出力し、同図ｃは比較器
１３Ｂの出力信号を示し、該信号は滴下なし
および滴下ありのときに出力し、同図ｄは
NOT回路１８の出力信号を示し、該信号は
滴下ありおよび連続流下のときに出力し、同
図ｅはAND回路１９の出力信号を示し、該
信号は滴下ありのときに出力し、同図ｆは
NOR回路２０の出力信号を示し、該信号は
連続流下のときに出力する。 Figures 8a to 8f show the drip status monitoring circuit 9A.
Figure a shows the electrical signals corresponding to three different drip conditions amplified by the amplifier 12, Figure b shows the output signal of the comparator 13A, which signal is amplified by the amplifier 12. Figure c shows the output signal of the comparator 13B, and this signal is output when there is no dripping and when there is dripping, and Figure d shows the output signal when the amount of received light is maximum.
The output signal of the NOT circuit 18 is shown, and this signal is output when there is dripping and continuous flow, and the figure e shows the output signal of the AND circuit 19, and this signal is output when there is dripping, and the figure f teeth
The output signal of the NOR circuit 20 is shown, and the signal is output when the flow is continuous.
(4‐2) 作 用
今、患者に１回宛点滴すべき量および望ま
しく制御すべき点滴速度を点滴状態監視回路
９Ａにおいて設定しなければならない。この
設定は制御回路１６に２つの基準値をプリセ
ツトすることで足りる。２つの基準値の中、
一つは１回の総点滴量を設定するためであ
り、もう一つは点滴速度を輸液の種類に応じ
た所望値に設定するためである。また、特に
フイードバツク制御を例えば30秒もしくは１
分間の所望時間毎に行なわせて注入管３を通
る注入速度の制御を行なう場合には、計数器
１５を単位計数時間が調整可能にプリセツト
できる構成のものを用いる。 (4-2) Effect Now, the amount to be infused at one time to the patient and the desired drip speed to be controlled must be set in the drip status monitoring circuit 9A. This setting suffices by presetting two reference values in the control circuit 16. Among the two standard values,
One is to set the total amount of one infusion, and the other is to set the infusion rate to a desired value depending on the type of infusion. In particular, feedback control can be controlled for 30 seconds or 1 hour.
When controlling the injection rate through the injection tube 3 at desired intervals of minutes, the counter 15 is constructed so that the unit counting time can be preset in an adjustable manner.
第５図において、点滴筒２内を落下する点
滴は発光体４と受光体５の光軸線を交差して
おり、またマスク板１０のスリツト１１は所
要の縦長に形成してあるので、受光体５は第
６図ａ，ｂ，ｃに示すように受光量の比率が
変わり、さらに第７図ａ，ｂ，ｃに示すよう
に滴下なし、滴下あり、連続流下にそれぞれ
対応する電気信号を出力する。そして、受光
体５の出力信号は増幅器１２で増幅され、第
８図ａに示す信号になり、その後２つの比較
器１３Ａ，１３Ｂにそれぞれ並列に入力す
る。比較器１３Ａは滴下なしのときに第８図
ｂのように１の信号を出力し、NOT回路１
８は比較器１３Ａの出力信号が０のとき、即
ち滴下ありおよび連続流下のときにそれぞれ
１の信号を出力する。比較器１３Ｂは第８図
ｃに示すように域値ＶBを越える滴下なしお
よび滴下ありのときにそれぞれ出力し、
AND回路１９はNOT回路１８の信号と比較
器１３Ｂの信号から第８図ｅに示すように滴
下ありのときに１の信号を出力し、また
NOR回路２０は２つの比較器１３Ａ，１３
Ｂの信号がいずれも入力されないとき、即ち
第８図ｆに示すように連続流下のときに出力
する。したがつて、この実施例では域値の異
なる２つの二比較器１３Ａ，１３Ｂと、
NOT回路１８と、AND回路１９とNOR回路
２０の組合せによつて滴下あり、連続流下の
二様、の点滴状態を誤動作なく有効に判別す
るようになつている。しかして、計数器１５
により単位時間毎、例えば１分間当りの点滴
数が計数されそれに応じたパルス信号が出力
され、点滴量表示器８には単位時間当りの点
滴量または／および累計点滴量がデジタルも
しくはアナログ表示される。したがつて、こ
の表示器８を読取れば、滴下なしについても
判別できる。また、制御回路１６は常時は計
数器１５からのパルス信号を入力して自身に
プリセツトされた基準値と比較し、偏差があ
る場合、該偏差がなくなるように該偏差に応
じたフイードバツク信号を出力し、また計数
器１５からのパルス信号の累計がプリセツト
された限界値に達したときもしくはNOR回
路２０からの出力信号を入力したとき、制御
回路１６はこれを受けて注入管閉鎖信号を出
力し続ける。したがつて、自動クレンメであ
る点滴バルブ６またはポンプ７は、制御回路
１６からフイードバツク信号を単位時間毎に
入力するときそれぞれバルブ開度またはポン
プ回転数を調整することになり、注入管３を
通る輸注量は所定速度に制御され、さらに制
御回路１６から注入管閉鎖信号を入力すると
き、即ち点滴量が限界値に達したときまたは
連続流下のとき、バルブを完全閉鎖し、また
はポンプ回転を停止して注入管３を通る輸注
量を０にする。このとき、点滴筒２内の点滴
は筒内圧力が高まつて停止する。 In FIG. 5, the drip falling inside the drip tube 2 intersects the optical axes of the light emitter 4 and the photoreceptor 5, and since the slit 11 of the mask plate 10 is formed to the required length, the photoreceptor 5, the ratio of the amount of received light changes as shown in Figure 6 a, b, c, and outputs electrical signals corresponding to no dripping, dripping, and continuous flow, respectively, as shown in Figure 7 a, b, and c. do. Then, the output signal of the photoreceptor 5 is amplified by the amplifier 12 to become the signal shown in FIG. 8a, and then input in parallel to two comparators 13A and 13B, respectively. The comparator 13A outputs a signal of 1 as shown in FIG. 8b when there is no dripping, and the NOT circuit 1
8 outputs a signal of 1 when the output signal of the comparator 13A is 0, that is, when there is dripping and when there is continuous flow. As shown in FIG. 8c, the comparator 13B outputs an output when there is no dripping exceeding the threshold value V B and when there is dripping, respectively.
The AND circuit 19 outputs a signal of 1 when there is a drop as shown in FIG. 8e from the signal of the NOT circuit 18 and the signal of the comparator 13B;
The NOR circuit 20 includes two comparators 13A, 13
It is output when no signal B is input, that is, when the flow is continuous as shown in FIG. 8f. Therefore, in this embodiment, two comparators 13A and 13B with different threshold values,
The combination of the NOT circuit 18, the AND circuit 19, and the NOR circuit 20 makes it possible to effectively discriminate between two dripping states, ie, dripping and continuous dripping, without any malfunction. However, counter 15
The number of drips per unit time, for example, per minute is counted and a corresponding pulse signal is output, and the drip amount display 8 displays the drip amount per unit time and/or the cumulative drip amount in digital or analog form. . Therefore, by reading this indicator 8, it is possible to determine whether there is any dripping. In addition, the control circuit 16 normally inputs the pulse signal from the counter 15 and compares it with a reference value preset in itself, and if there is a deviation, outputs a feedback signal according to the deviation so that the deviation disappears. Furthermore, when the cumulative total of pulse signals from the counter 15 reaches a preset limit value or when the output signal from the NOR circuit 20 is input, the control circuit 16 receives this and outputs an injection tube closing signal. continue. Therefore, when the drip valve 6 or the pump 7, which is an automatic drain, receives a feedback signal from the control circuit 16 every unit time, the valve opening degree or the pump rotation speed is adjusted respectively. The infusion volume is controlled at a predetermined speed, and when an infusion tube closing signal is input from the control circuit 16, that is, when the infusion volume reaches a limit value or when the infusion volume is continuous, the valve is completely closed or the pump rotation is stopped. The amount of infusion passing through the injection tube 3 is set to zero. At this time, the intravenous drip inside the drip tube 2 is stopped due to the increase in pressure within the tube.
また、警報器２１はNOR回路２０から出
力信号を入力するとき警報を発する。 Further, the alarm device 21 issues an alarm when receiving an output signal from the NOR circuit 20.
なお、点滴が連続流下となつたために自動
クレンメが閉鎖し警報器が鳴つたときは、医
師もしくは看護婦はこのことを累計点滴量が
限界値に達して警報器が鳴ることとの区別を
点滴量表示器８および点滴筒２の監視により
判別する。 In addition, when the automatic drainage system closes and the alarm sounds due to continuous drip flow, the doctor or nurse should distinguish this from the cumulative drip volume reaching the limit value and the alarm sounding. This is determined by monitoring the amount indicator 8 and the drip tube 2.
(5) 変形例
(5‐1) マスク板１０のスリツト１１に関する
変形例
注入びんが患者より遠いスタンド等に取付
けられると、点滴筒が傾いてセツトされるこ
とがある。そのような場合には、連続流下が
重力作用で曲がり縦長矩形のスリツトでは該
スリツトを通る光線と連続流が交わらないの
で連続流下の検出が不能となる。このため、
点滴筒が傾いても連続流下を検出して装置の
安全性を確保する必要がある。第９図はその
ような安全性が確保された注入装置の要部正
面図を示す。そのような安全性の確保は、点
滴筒が傾いていることを知らせる手段を設
け、医師もしくは看護婦による点滴筒が傾い
ていることを知らせる手段を設け、医師もし
くは看護婦による点滴筒の傾きの修正という
解決方法でも良いが、装置がコスト高になる
のでこの発明ではスリツトの形状を工夫する
ことにより点滴筒が傾いてセツトされても連
続流下を有効に検出できるように解決したも
のである。即ち、第９図のようにマスク板１
０のスリツト１１の縦辺の寸法だけでなく横
辺の寸法も点滴の径の1.5ないし３倍にし、
かつ重力作用を受けて曲がる点滴の連続流で
スリツト１１を通る光線が遮切られるように
該スリツト１１の形状を決定する。第９図で
はスリツト１１の形状は略逆Ｔ字形にしてあ
るが、これに限定されるものではない。(5) Modifications (5-1) Modifications regarding the slit 11 of the mask plate 10 When the infusion bottle is mounted on a stand or the like that is far from the patient, the drip tube may be set at an angle. In such a case, if the continuous flow curves due to the action of gravity and the continuous flow does not intersect with the light beam passing through the vertically long rectangular slit, it becomes impossible to detect the continuous flow. For this reason,
Even if the drip tube is tilted, continuous flow must be detected to ensure the safety of the device. FIG. 9 shows a front view of the essential parts of an injection device that ensures such safety. To ensure such safety, a means is provided to notify a doctor or nurse that the IV tube is tilted, and a means is provided to notify the doctor or nurse that the IV tube is tilted. Although a solution could be modification, the cost of the device would be high, so in this invention, the shape of the slit is devised so that continuous flow can be effectively detected even if the drip tube is set at an angle. That is, as shown in FIG.
Make not only the vertical dimension of the 0 slit 11 but also the horizontal dimension 1.5 to 3 times the diameter of the drip,
The shape of the slit 11 is determined so that the light beam passing through the slit 11 is blocked by a continuous stream of drips that bend under the action of gravity. In FIG. 9, the shape of the slit 11 is approximately an inverted T-shape, but the shape is not limited to this.
第１０図はこの発明において包含している
スリツト１１の種々の形状を示すものであ
り、同図ａは縦長矩形のスリツトとなつてお
り、スリツトの横幅Ｗは点滴の直径と略同じ
とし、またスリツトの縦幅Ｌは点滴の直径の
1.5倍ないし３倍、実用的に好ましい受光量
比率を得るため望ましくは２倍ないし３倍と
し、直径寸法Ｄの点線で示す円は受光体の有
効受光面積の大きさを示す。このような縦長
矩形は前述したように点滴筒が鉛直に正しく
セツトされた場合において滴下なし、滴下あ
り、連続流下の三様の点滴状態を検出でき、
点滴筒が傾いてセツトされたときは滴下あり
および連続流下を検出できない。ただし、点
滴状態監視回路においては滴下あり、連続流
下の二様しか判別できない。滴下なしについ
ては、表示器を読取ることにより判別でき
る。同図ｂ，ｃ，ｄ，ｅはそれぞれ点滴筒が
傾いてセツトされても実用的な光量変化を伴
つて検出できるように工夫した種々の形状を
示し、特に同図ｂおよびｃに示すように、ス
リツト１１を横長に切欠いた部分に相当する
スリツト水平部１１１と、このスリツト水平
部より上方へ切欠いた部分に相当するスリツ
ト垂直部１１２と、これらのスリツト水平部
とスリツト垂直部の交わるコーナーを大きく
丸味を付けるように切欠いた部分に相当する
スリツトコーナー部１１３とから成る形状で
ある略逆Ｔ字形または略Ｌ字形にするのが好
ましい。スリツト１１を略逆Ｔ字形とする場
合には点滴筒がいずれの方向に傾いてセツト
されることがある注入装置に採用でき、略Ｌ
字形とする場合には点滴筒が所定の一方向に
のみ傾いてセツトされることがある注入装置
に採用できる。点滴筒が傾いてセツトされて
も点滴の連続流下を検出し得るスリツト形状
は、第１０図ｂ，ｃ，ｄ，ｅから判るように
重力作用で連続流が曲る状態に対応してスリ
ツト曲線状に縁取りされていることが必要で
ある。第１０図ｂ，ｃ，ｄ，ｅにそれぞれ示
したスリツトに入れた諸寸法は、同図ａに示
した寸法との対比においてスリツト形状を明
らかにするために入れてある。同図ｂに示す
寸法Ｌ−Ｗ、即ちスリツト垂直部の縦辺は一
滴の点滴の直径の0.5倍ないし２倍となる。
また同図ｂおよびｃに示すスリツト形状の場
合は、それぞれ同図ｄおよびｅに比べて横幅
寸法が大きいので第５図に示す点滴ノズルと
スリツトとの距離ｈを大きくとつた場合に有
効であり、同図ｄおよびｅに示すスリツト形
状の場合には距離ｈを大きくとることはでき
ない。 Fig. 10 shows various shapes of the slit 11 included in the present invention, and Fig. 10 a shows a vertically long rectangular slit, and the width W of the slit is approximately the same as the diameter of the infusion. The vertical width L of the slit is the diameter of the drip.
The ratio is 1.5 to 3 times, preferably 2 to 3 times in order to obtain a practically preferable light reception ratio, and the circle shown by the dotted line with the diameter dimension D indicates the size of the effective light reception area of the photoreceptor. As mentioned above, such a vertically long rectangle can detect three types of drip status: no drip, drip, and continuous flow when the drip tube is properly set vertically.
If the drip tube is set at an angle, it is not possible to detect dripping or continuous flow. However, the drip status monitoring circuit can only distinguish between dripping and continuous flow. No dripping can be determined by reading the display. Figures b, c, d, and e in the same figure show various shapes designed to enable detection with practical changes in light intensity even if the drip tube is set at an angle. , a slit horizontal portion 111 corresponding to a horizontally long notched portion of the slit 11, a slit vertical portion 112 corresponding to a portion cut upward from this slit horizontal portion, and a corner where these slit horizontal portion and slit vertical portion intersect. It is preferable to form a substantially inverted T-shape or a substantially L-shape, which is a shape consisting of a slit corner portion 113 corresponding to a large rounded notch. When the slit 11 is formed into a substantially inverted T-shape, it can be used in an infusion device in which the drip barrel is set tilted in any direction, and the slit 11 has a substantially inverted T shape.
If it is shaped like a letter, it can be used in an injection device in which the drip barrel is set tilted only in one predetermined direction. The slit shape that allows continuous drip flow to be detected even if the drip tube is set at an angle is based on the slit curve, which corresponds to the state in which the continuous flow bends due to the action of gravity, as shown in Figure 10b, c, d, and e. It is necessary that the border be bordered in a shape. The dimensions of the slit shown in FIGS. 10b, c, d, and e are included to clarify the slit shape in comparison with the dimensions shown in FIG. 10a. The dimension L-W shown in Figure b, ie, the vertical side of the vertical part of the slit, is 0.5 to 2 times the diameter of one drop.
Furthermore, in the case of the slit shapes shown in Figures b and c, the width dimensions are larger than those in Figures d and e, respectively, so they are effective when the distance h between the drip nozzle and the slit shown in Figure 5 is increased. In the case of the slit shapes shown in , d and e of the figure, the distance h cannot be made large.
(5‐2) 点滴状態監視回路９に関する変形例
点滴状態監視回路９は２つの域値を設けて
受光体で得られる出力電気信号をその大小の
内容に応じて滴下あり、連続流下の二種類に
判別する判別回路を有して構成していれば足
り、第５図に示す判別回路１７を有する場合
に限定するものではない。例えば、第１１図
に示すように比較器１３Ｂの入力を反転して
連続流下のとき出力が出るようにした回路で
あつても良い。 (5-2) Modified example of the drip status monitoring circuit 9 The drip status monitoring circuit 9 has two threshold values and outputs the output electrical signal obtained from the photoreceptor into two types depending on the size of the signal: dripping and continuous flow. It is sufficient that the configuration includes a discriminating circuit for discriminating, and is not limited to the case where the discriminating circuit 17 shown in FIG. 5 is included. For example, as shown in FIG. 11, a circuit may be used in which the input of the comparator 13B is inverted so that an output is output when the flow is continuous.
(6) 効 果
以上説明してきたように、この発明の医療用
注入装置は、光電式点滴状態検出器を点滴筒に
付設し、該検出器で得られる電気信号の変化を
点滴状態監視回路で演算処理して滴下あり、連
続流下の二様の点滴状態に判別して点滴量およ
び点滴速度を監視または／および制御し、さら
に上記監視回路に設けた計数器の単位時間当り
の計数を点滴量表示器により表示するものにお
いて、スリツトを従来の横長矩形から所要の縦
長矩形にして実用的な光量変化率を得るように
するとともに点滴状態監視回路も滴下あり、連
続流下の二様に判別する判別回路を有して構成
したものである。したがつて、この発明の医療
用注入装置によれば、点滴状態を検出するセン
サーを発光体と受光体を備えて成るものとして
マスク板のスリツトに改良を加えただけで、従
来では滴下なしと滴下ありの二様の点滴状態し
か判別できなかつたものを滴下あり、連続流下
が判別できる実用的な受光量比率として十分か
つ有効に判別できて改良コストもほとんどかか
らずに済み、また点滴状態監視回路も２つの域
値を設けて受光体で得られる電気信号を滴下あ
り、連続流下の二様に判別し得る比較的簡単な
判別回路を従来の回路に付設しただけなので回
路構成が簡単になりかつ受光体で得られる光量
に比例した電気信号を確実・正確に判別できて
点滴量表示器および自動クレンメにより点滴状
態を監視または／および制御でき、所期の目的
を達成できる。また、この発明の実施態様とし
て、マスク板のスリツトを縦幅だけでなく横幅
も点滴の直径より1.5倍ないし３倍に大きく
し、かつスリツト水平部とスリツト垂直部のコ
ーナーを大きな丸味をもつて切欠いた略逆Ｔ字
形、略Ｌ字形等とした場合には、受光体の有効
受光面積と点滴の遮光面積との関係において実
用的に受光量変化の得られるスリツト形状とな
つて、このため受光体に実用的な出力電気信号
が得られ特に点滴筒が傾いてセツトされ点滴が
点滴筒の筒心を外れて重力落下する場合に有効
な判別が可能であり、もつて装置の高信頼性、
高安全性が維持される。(6) Effects As explained above, the medical infusion device of the present invention has a photoelectric drip status detector attached to the drip barrel, and changes in the electrical signal obtained by the detector are detected by the drip status monitoring circuit. The drip amount and drip speed are monitored and/or controlled by performing calculation processing to distinguish between two types of drip status: dripping and continuous flow, and the drip amount is determined by counting per unit time of a counter installed in the monitoring circuit. In what is displayed on the display, the slit is changed from the conventional horizontally long rectangle to the required vertically long rectangle to obtain a practical light intensity change rate, and the drip status monitoring circuit is also equipped to distinguish between dripping and continuous flow. It is configured with a circuit. Therefore, according to the medical injection device of the present invention, the sensor for detecting the drip state is equipped with a light emitter and a photoreceptor, and the slit of the mask plate is simply improved. It was previously possible to distinguish only between the two types of infusion states (i.e., dripping and continuous flow), but it can be sufficiently and effectively determined as a practical light reception amount ratio that can distinguish between dripping and continuous flow, and the improvement cost is almost negligible. The monitoring circuit also has two threshold values and drips the electrical signal obtained from the photoreceptor, and the circuit configuration is simple because it is simply a relatively simple discrimination circuit that can distinguish between two types of continuous flow and is added to the conventional circuit. The electrical signal proportional to the amount of light obtained by the photoreceptor can be determined reliably and accurately, and the drip status can be monitored and/or controlled using the drip amount indicator and automatic cleanser, thereby achieving the desired purpose. In addition, as an embodiment of the present invention, not only the vertical width but also the horizontal width of the slit of the mask plate is made 1.5 to 3 times larger than the diameter of the infusion, and the corners of the horizontal part of the slit and the vertical part of the slit have a large roundness. When the notch is formed into a substantially inverted T-shape, a substantially L-shape, etc., the slit shape can practically change the amount of light received in the relationship between the effective light-receiving area of the photoreceptor and the light-blocking area of the drip. Practical output electrical signals can be obtained to the body, and effective discrimination can be made especially when the drip tube is set at an angle and the drip falls off the center of the tube and falls due to gravity, thereby increasing the reliability of the device.
High safety is maintained.
第１図ないし第４図は従来例にかかり、第１図
は医療用注入装置の全体的構成の説明用概念図、
第２図は要部の構造斜視図および回路図、第３図
ａ，ｂ，ｃはそれぞれ要部であるマスク板と点滴
状態との関係を示す正面図、第４図ａ，ｂ，ｃは
それぞれ第３図ａ，ｂ，ｃに対応する受光体の出
力電気信号の大きさを示す出力図である。第５図
ないし第８図はこの発明の実施例にかかり、第５
図は第２図に対応するもので医療用注入装置の要
部である構造斜視図および回路図、第６図ａ，
ｂ，ｃはそれぞれマスク板と点滴状態との関係を
示す正面図、第７図ａ，ｂ，ｃはそれぞれ第６図
ａ，ｂ，ｃに対応する受光体の出力電気信号の大
きさを示す出力図、第８図ａ，ｂ，ｃ，ｄ，ｅ，
ｆは第５図に示す回路におけるそれぞれ増幅器、
２つの比較器、NOT回路、AND回路、NOR回路
の出力信号を示す出力図である。第９図はこの発
明の変形例にかかり、点滴筒が傾いてセツトされ
ても連続流下が検出できるようにマスク板のスリ
ツト形状を改良した説明のための要部正面図、第
１０図はこの発明に包含される種々のスリツト形
状としたマスク板正面図である。第１１図はこの
発明の変形例にかかる点滴状態判別回路図であ
る。
２……点滴筒、３……注入管、４……発光体、
５……受光体、９Ａ……点滴状態監視回路、１０
……マスク板、１１……スリツト、１１１……ス
リツト水平部、１１２……スリツト垂直部、１１
３……スリツトコーナー部、１７……判別回路。
1 to 4 relate to a conventional example, and FIG. 1 is a conceptual diagram for explaining the overall configuration of a medical injection device;
Fig. 2 is a structural perspective view and circuit diagram of the main parts, Fig. 3 a, b, and c are front views showing the relationship between the main parts of the mask plate and the drip state, respectively, and Fig. 4 a, b, and c are the main parts. FIG. 3 is an output diagram showing the magnitude of the output electrical signal of the photoreceptor corresponding to FIGS. 3a, b, and c, respectively; FIG. 5 to 8 relate to embodiments of the present invention, and FIG.
The figures correspond to Fig. 2 and include a structural perspective view and circuit diagram of the main parts of the medical injection device, Fig. 6a,
b and c are front views showing the relationship between the mask plate and the dripping state, respectively, and Fig. 7 a, b, and c show the magnitude of the output electrical signal of the photoreceptor corresponding to Fig. 6 a, b, and c, respectively. Output diagram, Figure 8 a, b, c, d, e,
f is the amplifier in the circuit shown in FIG.
FIG. 3 is an output diagram showing output signals of two comparators, a NOT circuit, an AND circuit, and a NOR circuit. Fig. 9 is a front view of a main part of a modified example of the present invention for explaining the improved slit shape of the mask plate so that continuous flow can be detected even if the drip tube is set at an angle, and Fig. 10 is a front view of the main part of this modification. FIG. 3 is a front view of a mask plate having various slit shapes included in the invention. FIG. 11 is a circuit diagram for determining the drip state according to a modification of the present invention. 2...Drip tube, 3...Injection tube, 4...Light emitter,
5...Photoreceptor, 9A...Drip status monitoring circuit, 10
...Mask plate, 11...Slit, 111...Slit horizontal part, 112...Slit vertical part, 11
3...Slit corner portion, 17...Discrimination circuit.
Claims (1)
に変換して出力する点滴状態検出器と、この検出
器の出力信号を演算処理して点滴状態を監視また
は／および制御する点滴状態監視回路と、この点
滴状態監視回路に設けられた単位時間当りの点滴
数を計数する計数器の出力を表示する点滴量表示
器とを備え、上記点滴状態検出器は、点滴筒内の
点滴の落下経路に光軸線を交差して互いに向き合
う発光体および受光体と、この受光体の直前に備
えるスリツトを有するマスク板とから成る医療用
注入装置において、 上記マスク板のスリツトは上記受光体に少くと
も一滴の点滴の縦長寸法より長い縦長光量が入射
する大きさであり、 他方上記点滴状態監視回路は２つの域値を設け
て上記受光体で得られる出力電気信号をその大小
内容に応じて滴下あり、連続流下の二様に判別す
る判別回路を有し、また滴下なしを前記点滴表示
装置により判別できることを特徴とする医療用注
入装置。 ２ 上記マスク板のスリツトは、横長に切欠いた
部分に相当するスリツト水平部と、これらのスリ
ツト水平部より上方へ切欠いた部分に相当するス
リツト垂直部と、これらのスリツト水平部とスリ
ツト垂直部の交わるコーナーを大きく丸味を付け
るように切欠いた部分に相当するスリツトコーナ
ー部とから成る形状としたことを特徴とする特許
請求の範囲第１項記載の医療用注入装置。 ３ 上記マスク板のスリツトは、略逆Ｔ字形に形
成された特許請求の範囲第２項記載の医療用注入
装置。 ４ 上記マスク板のスリツトは、略逆Ｔ字形に形
成された特許請求の範囲第２項記載の医療用注入
装置。 ５ 上記スリツト水平部の縦辺を一滴の点滴の直
径と略等しくするとともに横辺を1.5倍ないし３
倍とし、また上記スリツト垂直部を一滴の点滴の
直径と略等しくするとともに縦辺を0.5倍ないし
２倍としたことを特徴とする特許請求の範囲第２
項、第３項および第４項のいずれか一に記載の医
療用注入装置。[Scope of Claims] 1. A drip status detector that is attached to a drip tube to detect the drip status, convert it into an electrical signal, and output it, and monitor and/or control the drip status by processing the output signal of this detector. and a drip amount display that displays the output of a counter that counts the number of drips per unit time, and the drip status detector is installed inside the drip tube. In a medical injection device comprising a light emitter and a light receiver facing each other with their optical axes intersecting the falling path of the intravenous drop, and a mask plate having a slit provided just in front of the light receiver, the slit in the mask plate has a slit for receiving the light. The size is such that a vertical light quantity longer than the vertical dimension of at least one intravenous drop is incident on the body, and the above-mentioned intravenous drip status monitoring circuit has two threshold values to determine the magnitude of the output electrical signal obtained from the above-mentioned photoreceptor. 1. A medical infusion device, characterized in that it has a discriminating circuit that determines whether there is a drip or a continuous flow, and whether there is no drip can be determined by the drip display device. 2 The slits in the mask plate have horizontal slit parts corresponding to horizontally long notches, vertical slit parts corresponding to parts cut upward from these horizontal slit parts, and the horizontal slit parts and the vertical slit parts. 2. The medical injection device according to claim 1, wherein the medical injection device has a shape including a slit corner portion corresponding to a notch portion in which the intersecting corners are largely rounded. 3. The medical injection device according to claim 2, wherein the slit of the mask plate is formed in a substantially inverted T-shape. 4. The medical injection device according to claim 2, wherein the slit of the mask plate is formed in a substantially inverted T-shape. 5 The vertical side of the horizontal part of the slit should be approximately equal to the diameter of a single infusion, and the horizontal side should be 1.5 to 3 times larger.
Claim 2, characterized in that the vertical part of the slit is made approximately equal to the diameter of a single infusion, and the vertical side is made 0.5 to 2 times as large.
3. The medical injection device according to any one of Items 3 and 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56124822A JPS5827560A (en) | 1981-08-11 | 1981-08-11 | Medical pouring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56124822A JPS5827560A (en) | 1981-08-11 | 1981-08-11 | Medical pouring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5827560A JPS5827560A (en) | 1983-02-18 |
| JPS6241028B2 true JPS6241028B2 (en) | 1987-09-01 |
Family
ID=14894959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56124822A Granted JPS5827560A (en) | 1981-08-11 | 1981-08-11 | Medical pouring apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5827560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333156C (en) * | 2003-10-20 | 2007-08-22 | 丰田自动车株式会社 | Exhaust gas purification system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6427563A (en) * | 1987-07-23 | 1989-01-30 | Nikko Eng | Transfusion flow rate control apparatus |
| JP5009427B1 (en) * | 2011-05-30 | 2012-08-22 | 大昭電機株式会社 | Chemical detection device |
| JP2017094417A (en) * | 2015-11-19 | 2017-06-01 | 株式会社ディスコ | Working device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5552762A (en) * | 1978-10-12 | 1980-04-17 | Corona Industries | Drip monitor device |
-
1981
- 1981-08-11 JP JP56124822A patent/JPS5827560A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5552762A (en) * | 1978-10-12 | 1980-04-17 | Corona Industries | Drip monitor device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333156C (en) * | 2003-10-20 | 2007-08-22 | 丰田自动车株式会社 | Exhaust gas purification system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5827560A (en) | 1983-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5256155A (en) | Drop detection method and apparatus | |
| CA1240755A (en) | Empty container detector with drop sensor | |
| CA1271541A (en) | Apparatus and method for controlling the flow of fluid through an administration set | |
| ES2418630T3 (en) | Empty container detection using a container side pressure sensor | |
| CA1111122A (en) | Drop discriminator system | |
| JP3321620B2 (en) | Apparatus and method for detection of air in a liquid delivery system | |
| US9446191B2 (en) | Flow sensor for medical pump | |
| EP1144961B1 (en) | Droplet counter for low flow rates | |
| US5445622A (en) | Flow switch device for medical applications | |
| US4509943A (en) | Infusion control apparatus | |
| KR20180015550A (en) | Flow Rate Measurement and Control Device for Intravenous Fluid | |
| EP0121406B1 (en) | Dual source parenteral infusion apparatus | |
| KR101727229B1 (en) | Measuring apparatus for the flow rate of ringer solution | |
| JPS6241028B2 (en) | ||
| US20070112329A1 (en) | Infiltration detection system | |
| JP3185064U (en) | Infusion pump | |
| JPS59166816A (en) | Flow monitor device with optical sensing chamber | |
| JPH02286175A (en) | Controller for flow of intravenous drip injection | |
| JPH04108455A (en) | Transfusion pump |