JPH03231680A - Drip detector and drip infusion alarming apparatus with this detector and apparatus for controlling amount of drip - Google Patents

Drip detector and drip infusion alarming apparatus with this detector and apparatus for controlling amount of drip

Info

Publication number
JPH03231680A
JPH03231680A JP2025128A JP2512890A JPH03231680A JP H03231680 A JPH03231680 A JP H03231680A JP 2025128 A JP2025128 A JP 2025128A JP 2512890 A JP2512890 A JP 2512890A JP H03231680 A JPH03231680 A JP H03231680A
Authority
JP
Japan
Prior art keywords
drip
amount
detector
image
water drop
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2025128A
Other languages
Japanese (ja)
Inventor
Hiroshi Sakai
宏 酒井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Terumo Corp
Original Assignee
Terumo Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Terumo Corp filed Critical Terumo Corp
Priority to JP2025128A priority Critical patent/JPH03231680A/en
Priority to AU70299/91A priority patent/AU623566B2/en
Priority to DE69112442T priority patent/DE69112442T2/en
Priority to EP91101527A priority patent/EP0441323B1/en
Publication of JPH03231680A publication Critical patent/JPH03231680A/en
Priority to US07/957,452 priority patent/US5331309A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16886—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body for measuring fluid flow rate, i.e. flowmeters
    • A61M5/1689—Drip counters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/13—Infusion monitoring

Landscapes

  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Hematology (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

PURPOSE:To detect reliably a water drop regardless of change in the condition in a drip cylinder by providing a detecting means grasping the dropping condition in the drip cylinder as an image and a detecting means for the water drop falling down in the drip cylinder. CONSTITUTION:An LED 2, a lens for forming a parallel light, an image sensor 5 and a drip control part 6 consisting of a microcomputor are assembled in a case 1, which is slidable and has a structure pinching a drip cylinder from both sides. The drip control part 6 makes a counter 61b zero and starts a timer 61a and then scans an image sensor 5 and the image data is stored in an image storing part 64a. Then, comparing an image data stored by the previous image scan with the image data of this time, the existence of a water drop is checked. When no water drop exists, an input data from the image sensor 5 is output by adding an adhered water drop caused by rebounding and a cloud of the wall of the drip cylinder and when a water drop exists, the input data is output by adding an output based on the water drop to this output. Therefore, a difference between both cases is taken, an output based on the water drop can be obtd.

Description

【発明の詳細な説明】 ［産業上の利用分野〕 本発明は点滴検出機及びそれを備えた点滴警報装置並び
に点滴量制御装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drip detector, a drip alarm device equipped with the same, and a drip amount control device.

［従来の技術］ 従来の点滴検出は、第５図に示すように、発光ダイオー
ド５１とフォトダイオード（あるいはフォトトランジス
タ）５４とを組み合わせて、レンズ５２により平行光を
作りレンズ５３で点滴筒を通過した光を集光し、その光
量の変化による点滴筒内を通過した水滴の検出に基づく
ものであった。すなわち、第６Ａ図のようにフォトダイ
オード５４の出力値が所定スレッシュレベルを越えた場
合に、水滴の通過と認識するように動作する。[Prior Art] As shown in FIG. 5, conventional drip detection uses a combination of a light emitting diode 51 and a photodiode (or phototransistor) 54 to create parallel light with a lens 52 and pass through the drip tube with a lens 53. The method was based on condensing the light and detecting water droplets that passed through the drip tube based on changes in the amount of light. That is, when the output value of the photodiode 54 exceeds a predetermined threshold level as shown in FIG. 6A, it operates to recognize that a water droplet has passed.

［発明が解決しようとしている課題］ しかしながら、受光側の半導体が１個で光量が集光され
たものであるため、長時間使用する時に水のはね返り等
で点滴筒内壁に水滴が付着した場合、又は気温の変動等
により内壁がくもった場合には、受光素子の受ける光量
は減衰し、例えば第６Ｂ図のように水滴が通過中である
時の電圧レベルと通過中でない時の電圧レベルの差が小
さくなり（Ｓ／Ｎ比が低下し）、水滴の検８がむづかし
くなるという問題点があった。又、受光素子に直接太陽
光等の強い外乱光が入射することにより、誤検出が発生
するという問題点もあった。[Problems to be Solved by the Invention] However, since the amount of light is concentrated by a single semiconductor on the light receiving side, if water droplets adhere to the inner wall of the drip tube due to water splashing during long-term use, Or, if the inner wall becomes cloudy due to changes in temperature, etc., the amount of light received by the light receiving element will attenuate, and for example, as shown in Figure 6B, the difference between the voltage level when the water droplet is passing and the voltage level when it is not passing through. There is a problem in that the signal becomes small (the S/N ratio decreases), making it difficult to detect water droplets. Further, there is a problem in that erroneous detection occurs due to strong disturbance light such as sunlight directly entering the light receiving element.

本発明は、前記従来の欠点を除去し、点滴筒の状態変化
にかかわらず、確実に水滴を検知する点滴検出機を提供
する。The present invention eliminates the conventional drawbacks and provides a drip detector that reliably detects water droplets regardless of changes in the state of the drip tube.

又、外部からの外乱光を受光しない受光部を備える点滴
検出機を提供する。The present invention also provides a drip detector equipped with a light receiving section that does not receive disturbance light from the outside.

さらに、これらの点滴検出機を利用した点滴警報機並び
に点滴量制御装置を提供する。Furthermore, a drip alarm device and a drip amount control device using these drip detectors are provided.

［課題を解決するための手段］ この課題を解決するために、本発明の点滴検出機は、点
滴筒内を落下する水滴を検出する点滴検出機であって、 透明の点滴筒外壁面付近に位置され、点滴筒内の滴下状
況をイメージとして捕える検出手段と、該検出手段から
のイメージに基づいて、点滴筒内を落下する水滴を検知
する水滴検知手段とを備える。[Means for Solving the Problem] In order to solve this problem, the drip detector of the present invention is a drip detector that detects water droplets falling inside the drip tube, and has the following features: The apparatus includes a detecting means that is located at a position and captures the dripping situation in the drip tube as an image, and a water drop detection means that detects water droplets falling inside the drip tube based on the image from the detecting means.

ここで、前記検出手段は、可視光に発光ピークをもつ光
源とレンズとを組み合わせて平行光を発光する光源と、
点滴筒を通過後の前記平行光を受光するイメージセンサ
とを備える。Here, the detection means includes a light source that emits parallel light by combining a light source with an emission peak in visible light and a lens;
and an image sensor that receives the parallel light after passing through the drip tube.

又、前記イメージセンサの入力前方位置に所定長さ以上
で所定高さ以下のスリットを設け、直接外乱光が入りに
くい構造にした。Further, a slit having a length of a predetermined length or more and a predetermined height or less is provided at a position in front of the input of the image sensor to create a structure that prevents direct disturbance light from entering.

更に、前記点滴検出機から得られる検知データに基づい
て点滴量を検出する点滴量検出手段と、点滴量が所定量
であるかどうか判断する判断手段と、その判断に基づい
て警報を発生する発生手段とを備える。Furthermore, a drip amount detection means for detecting the drip amount based on detection data obtained from the drip detector, a determining means for determining whether the drip amount is a predetermined amount, and a generator for generating an alarm based on the determination. and means.

又、前記点滴検出機から得られる検知データに基づいて
点滴量を検出する点滴量検出手段と、該点滴量を所定量
に制御する点滴量制御手段とを備える。The apparatus also includes a drip amount detection means for detecting the drip amount based on detection data obtained from the drip detector, and a drip amount control means for controlling the drip amount to a predetermined amount.

［作用］ かかる構成において、イメージセンサにより点滴筒内部
のくもり等をイメージとしてとらえるため水滴の正確な
検知が出来、又イメージセンサの位置を最適化する事に
より外乱光が直接入射しにくい構造として耐ノイズ性を
向上させた。[Function] In this configuration, water droplets can be accurately detected because the image sensor captures cloudiness inside the drip tube as an image, and by optimizing the position of the image sensor, the structure is resistant to external light entering directly. Improved noise.

又イメージセンサや点滴量制御手段を一体化することに
より、点滴検出機の設置操作のみで点滴量制御を可能と
した。Furthermore, by integrating the image sensor and the drip amount control means, it has become possible to control the drip amount by simply installing the drip detector.

［実施例］ 以下、本発明の実施例を図面を参照して具体的に説明す
る。[Example] Hereinafter, an example of the present invention will be specifically described with reference to the drawings.

第１Ａ図は本実施例の点滴検出機を備えた点滴制御装置
の上面図である。第１Ｂ図は第１Ａ図の正面図である。FIG. 1A is a top view of a drip control device equipped with a drip detector according to this embodiment. FIG. 1B is a front view of FIG. 1A.

尚、輸液ポンプは図示されていない。Note that the infusion pump is not shown.

ケースｌには、内部にＬＥＤ２と平行光生成用のレンズ
３とイメージセンサ５とマイコンから成る点滴制御部６
とが組み込まれており、ケース部１はスライドできて点
滴筒４を両側から挟み込む構造になっている。ＬＥＤ２
は点滴制御部６からの指令により点灯される。一方、イ
メージセンサ５からのデータは点滴制御部６へ取り込ま
れ、取り込まれたデータに基づいてパターンの比較によ
り水滴が通過中か否かの判断をする。Inside the case L, there is an infusion control unit 6 that includes an LED 2, a lens 3 for generating parallel light, an image sensor 5, and a microcomputer.
The case part 1 is structured to be able to slide and sandwich the drip tube 4 from both sides. LED2
is lit according to a command from the drip control section 6. On the other hand, data from the image sensor 5 is taken into the drip control section 6, and based on the taken data, it is determined whether or not a water droplet is passing through by comparing patterns.

そして、流量に応じた点滴間隔時間と実際に検出された
点滴間隔との比較をして、輸液ポンプの制御を行う。Then, the infusion pump is controlled by comparing the infusion interval time corresponding to the flow rate with the actually detected infusion interval.

第２図は点滴制御部６の構成を示したブロック図である
。FIG. 2 is a block diagram showing the configuration of the drip control section 6. As shown in FIG.

イメージセンサ５からのデータは、入力インタフェース
６２を介してデジタルデータとしてＲＡＭ６４内のイメ
ージ記憶部６４ａに記憶される。ＣＰＵ６１はタイマ６
１ａ、カウンタ６１ｂ及びカウンタ値６３ａを使用して
、ＲＯＭ６３に格納された制御プログラムに従って、点
滴量を検知し、点滴量を制御する信号を出力インタフェ
ース６５を介して図示されない輸液ポンプに出力する。Data from the image sensor 5 is stored as digital data in the image storage section 64a in the RAM 64 via the input interface 62. CPU61 is timer 6
1a, counter 61b, and counter value 63a, the drip amount is detected according to a control program stored in ROM 63, and a signal for controlling the drip amount is outputted to an infusion pump (not shown) via output interface 65.

第３図は点滴制御部６の制御手順を示すフローチャート
である。第３図には点滴制御のサブルーチンのみが示さ
れている。FIG. 3 is a flowchart showing the control procedure of the drip control section 6. FIG. 3 shows only the drip control subroutine.

まず、ステップＳ３０でカウンタ６１ｂを零にし、タイ
マ６１ａをスタートする０次に、ステップＳ３１でイメ
ージセンサを走査し、ステップＳ３２でこのイメージデ
ータなイメージ記憶部６４ａに記憶する。ステップＳ３
３ですでに前回のイメージ走査で記憶されたイメージデ
ータと今回のイメージデータとが比較されて、ステップ
Ｓ３４で水滴が有るか無いかがチエツクされる。First, in step S30, the counter 61b is set to zero, and the timer 61a is started.Next, in step S31, the image sensor is scanned, and in step S32, this image data is stored in the image storage section 64a. Step S3
In step S3, the image data already stored in the previous image scan is compared with the current image data, and in step S34, it is checked whether there are water droplets.

第４Ａ図〜第４Ｃ図により水滴検知の方法を説明する。A method of detecting water droplets will be explained with reference to FIGS. 4A to 4C.

第４Ａ図は水滴が無い場合のイメージセンサ５からの入
力データであり、はね返りによる付着水滴や点滴筒壁の
くもり等がプラスとして出力されている。第４Ｂ図は水
滴が成る場合の入力データであり、第４Ａ図の出力に水
滴によるプラス出力が重ね合わされて出力されている。FIG. 4A shows input data from the image sensor 5 when there are no water droplets, and adhering water droplets due to splashing, cloudiness on the drip tube wall, etc. are output as positive data. FIG. 4B shows input data when a water droplet is formed, and the positive output due to the water droplet is superimposed on the output of FIG. 4A and output.

従って、第４Ａ図と第４Ｂ図との差分な取ると、第４Ｃ
図のように付着水滴や点滴筒壁のくもりを除いた水滴の
みの出力が得られる。尚、この方法によれば、点滴筒の
変更、特に壁を透明から色つきに変えても、そのまま水
滴の検知が可能である。Therefore, if we take the difference between Figure 4A and Figure 4B, then Figure 4C
As shown in the figure, only the water droplets can be output without adhering water droplets and cloudy water on the drip tube wall. According to this method, even if the drip tube is changed, especially if the wall is changed from transparent to colored, water droplets can still be detected.

第３図に戻って、水滴有りと判断された場合はステップ
Ｓ３５でカウンタ６１ｂを＋１する。Returning to FIG. 3, if it is determined that there are water droplets, the counter 61b is incremented by 1 in step S35.

ステップＳ３６でタイマ６１ａが所定値Ｔを越えたか否
かがチエツクされ、越えていない場合はステップＳ３１
に戻ってステップＳ３１〜Ｓ３６を繰り返す。タイマ６
．１ａが所定ｆｌ　Ｔを越えていれば、ステップＳ３７
でカウンタ６１ｂの内容とカウンタ値Ｃとが比較されて
、等しい場合は点滴量は正常であるため何もせず、カウ
ンタ値Ｃより小さければステップＳ３８で輸液量を増加
するように輸液ポンプへ信号を送り、カウンタ値Ｃより
大きければステップＳ３９で輸液量を減少するように輸
液ポンプへ信号を送りリターンする。尚、カウンタ値Ｃ
はＲＡＭ６４に外部から入力出来るようにして、輸液量
の設定を可変としてもよい。In step S36, it is checked whether the timer 61a has exceeded a predetermined value T, and if it has not exceeded it, step S31
Steps S31 to S36 are repeated. timer 6
．． 1a exceeds the predetermined fl T, step S37
The contents of the counter 61b and the counter value C are compared, and if they are equal, the infusion amount is normal and nothing is done; if it is smaller than the counter value C, a signal is sent to the infusion pump to increase the infusion amount in step S38. If it is larger than the counter value C, a signal is sent to the infusion pump to reduce the amount of infusion in step S39, and the process returns. Furthermore, the counter value C
may be input into the RAM 64 from the outside to make the setting of the infusion volume variable.

又、第１Ａ図、第１Ｂ図に示したように、イメージセン
サ５の入光前方に所定値以上の長さす、所定値以下の高
さａのスリットを設け、イメージセンサ５が平行光のみ
を受光する構造にすることにより、外部からの外乱光を
遮断して安定した水滴検知を可能とした。Further, as shown in FIGS. 1A and 1B, a slit having a length of a predetermined value or more and a height a of a predetermined value or less is provided in front of the image sensor 5 where light enters, so that the image sensor 5 receives only parallel light. By creating a light-receiving structure, we are able to block external disturbance light and enable stable water droplet detection.

以上詳述したように、点滴検出にイメージセンサを用い
、又その配置を工夫したことにより、点滴筒内部のくも
り等に強く外乱光に強い点滴検出機が提供される。又、
この点滴検出機を用いれば、点滴量の正常、異常の判定
が確実な点滴警報装置ができる。又、マイコンを点滴検
出機に搭載したことにより、点滴検出機の設置のみで点
滴量を正常範囲に制御できる点滴量制御装置ができる。As described in detail above, by using an image sensor for drip detection and devising its arrangement, a drip detector is provided that is resistant to fogging inside the drip barrel and resistant to external light. or,
By using this drip detector, it is possible to create a drip alarm device that can reliably determine whether the drip amount is normal or abnormal. Furthermore, by mounting a microcomputer on the drip detector, a drip amount control device can be created that can control the drip amount within a normal range simply by installing the drip detector.

［発明の効果］ 本発明により、点滴筒の状態変化にかかわらず、点滴の
正確な判定が可能な点滴検出機を提供できる。[Effects of the Invention] According to the present invention, it is possible to provide a drip detector that can accurately determine a drip regardless of changes in the state of the drip barrel.

又、外部からの外乱光を受光しない受光部を備える点滴
検出機を提供できる。Furthermore, it is possible to provide a drip detector equipped with a light receiving section that does not receive disturbance light from the outside.

又、点滴量の正常、異常の判定が正確な点滴警報装置を
提供できる。Further, it is possible to provide an infusion alarm device that accurately determines whether the infusion amount is normal or abnormal.

更に、点滴量を正確に制御できる点滴量制御装置を提供
できる。Furthermore, it is possible to provide a drip amount control device that can accurately control the drip amount.

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

第１Ａ図は本実施例の点滴制御装置の上面図、第１Ｂ図
は第１Ａ図の点滴制御装置の正面図、第２図は点滴制御
部の構成を示すブロック図、第３図は点滴制御部の制御
手順を示すフローチャート、 第４Ａ図〜第４Ｃ図は本実施例の水滴検知例を説明する
図、 第５図は従来の水滴検知器の構成を示す図、第６Ａ図、
第６Ｂ図は従来の水滴検知例を説明する図である。 図中、１・・・ケース、２・・・ＬＥＤ、３・・・レン
ズ、４・・・点滴筒、５・・・イメージセンサ、６・・
・点滴制御部、６１−ＣＰＵ、　６１　ａ・・・タイマ
、６　ｌ　ｂ　−・・カウンタ、６２・・・入力インタ
フェース、６３・・・ＲＯＭ、６３　ａ−・・カウンタ
値Ｃ１６４・ＲＡ　Ｍ、６４ａ・・・イメージ記憶部、
６５・・・出力インタフェースである。FIG. 1A is a top view of the drip control device of this embodiment, FIG. 1B is a front view of the drip control device of FIG. 1A, FIG. 2 is a block diagram showing the configuration of the drip control section, and FIG. 3 is a drip control FIGS. 4A to 4C are diagrams explaining an example of water droplet detection in this embodiment; FIG. 5 is a diagram showing the configuration of a conventional water droplet detector; FIG. 6A;
FIG. 6B is a diagram illustrating an example of conventional water droplet detection. In the figure, 1... Case, 2... LED, 3... Lens, 4... Drip tube, 5... Image sensor, 6...
・Drip control unit, 61-CPU, 61 a...Timer, 6 lb--Counter, 62...Input interface, 63...ROM, 63 a--Counter value C164・RAM, 64a ...image storage section,
65... Output interface.

Claims (4)

【特許請求の範囲】[Claims] （１）点滴筒内を落下する水滴を検出する点滴検出機で
あつて、 透明の点滴筒外壁面付近に位置され、点滴筒内の滴下状
況をイメージとして捕える検出手段と、該検出手段から
のイメージに基づいて、点滴筒内を落下する水滴を検知
する水滴検知手段とを備えることを特徴とする点滴検出
機。(1) A drip detector that detects water droplets falling inside the drip tube, which includes a detection means that is located near the transparent outer wall of the drip tube and captures the dripping situation inside the drip tube as an image, and a detection means that detects water droplets falling inside the drip tube. A drip detector comprising: water droplet detection means for detecting water droplets falling in a drip tube based on an image. （２）前記検出手段は、可視光に発光ピークをもつ光源
とレンズとを組み合わせて平行光を発光する光源と、点
滴筒を通過後の前記平行光を受光するイメージセンサと
を備えることを特徴とする請求項第１項記載の点滴検出
機。(2) The detection means includes a light source that emits parallel light by combining a light source with an emission peak in visible light and a lens, and an image sensor that receives the parallel light after passing through the drip tube. The drip detector according to claim 1, wherein: （３）前記イメージセンサの入力前方位置に所定長さ以
上で所定高さ以下のスリットを設け、直接外乱光が入り
にくい構造にしたことを特徴とする請求項第２項記載の
点滴検出機。(3) The drip detector according to claim 2, characterized in that a slit of a predetermined length or more and a predetermined height or less is provided at a position in front of the input of the image sensor to create a structure that prevents direct disturbance light from entering. （４）前記点滴検出機から得られる検知データに基づい
て点滴量を検出する点滴量検出手段と、点滴量が所定量
であるかどうか判断する判断手段と、 その判断に基づいて警報を発生する発生手段とを備える
ことを特徴とする点滴警報装置。（５）前記点滴検出機
から得られる検知データに基づいて点滴量を検出する点
滴量検出手段と、該点滴量を所定量に制御する点滴量制
御手段とを備えることを特徴とする点滴量制御装置。(4) drip amount detection means for detecting the drip amount based on detection data obtained from the drip detector; judgment means for determining whether the drip amount is a predetermined amount; and generating an alarm based on the determination. A drip alarm device comprising a generating means. (5) Intravenous drip amount control, comprising: an infusion amount detection means for detecting an infusion amount based on detection data obtained from the infusion detector; and an infusion amount control means for controlling the infusion amount to a predetermined amount. Device.
JP2025128A 1990-02-06 1990-02-06 Drip detector and drip infusion alarming apparatus with this detector and apparatus for controlling amount of drip Pending JPH03231680A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2025128A JPH03231680A (en) 1990-02-06 1990-02-06 Drip detector and drip infusion alarming apparatus with this detector and apparatus for controlling amount of drip
AU70299/91A AU623566B2 (en) 1990-02-06 1991-02-05 Drip detecting device and drip alarming device and drip rate control device which incorporate drip detecting device
DE69112442T DE69112442T2 (en) 1990-02-06 1991-02-05 Drop detector.
EP91101527A EP0441323B1 (en) 1990-02-06 1991-02-05 Drip detecting device
US07/957,452 US5331309A (en) 1990-02-06 1992-10-07 Drip detecting device and drip alarming device and drip rate control device which incorporate drip detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2025128A JPH03231680A (en) 1990-02-06 1990-02-06 Drip detector and drip infusion alarming apparatus with this detector and apparatus for controlling amount of drip

Publications (1)

Publication Number Publication Date
JPH03231680A true JPH03231680A (en) 1991-10-15

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Country Status (5)

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US (1) US5331309A (en)
EP (1) EP0441323B1 (en)
JP (1) JPH03231680A (en)
AU (1) AU623566B2 (en)
DE (1) DE69112442T2 (en)

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Also Published As

Publication number Publication date
EP0441323B1 (en) 1995-08-30
AU7029991A (en) 1991-08-08
DE69112442D1 (en) 1995-10-05
EP0441323A1 (en) 1991-08-14
DE69112442T2 (en) 1996-02-29
US5331309A (en) 1994-07-19
AU623566B2 (en) 1992-05-14

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