JPH06296690A - Syringe pump - Google Patents

Syringe pump

Info

Publication number
JPH06296690A
JPH06296690A JP5110984A JP11098493A JPH06296690A JP H06296690 A JPH06296690 A JP H06296690A JP 5110984 A JP5110984 A JP 5110984A JP 11098493 A JP11098493 A JP 11098493A JP H06296690 A JPH06296690 A JP H06296690A
Authority
JP
Japan
Prior art keywords
piston rod
syringe
syringe pump
mounting
sensor
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.)
Granted
Application number
JP5110984A
Other languages
Japanese (ja)
Other versions
JP3381301B2 (en
Inventor
Atsushi Ikeda
敦 池田
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.)
Nippon Medical Supply Corp
Original Assignee
Nippon Medical Supply 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 Nippon Medical Supply Corp filed Critical Nippon Medical Supply Corp
Priority to JP11098493A priority Critical patent/JP3381301B2/en
Publication of JPH06296690A publication Critical patent/JPH06296690A/en
Application granted granted Critical
Publication of JP3381301B2 publication Critical patent/JP3381301B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • 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
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • A61M5/1684—Monitoring, detecting, signalling or eliminating infusion flow anomalies by detecting the amount of infusate remaining, e.g. signalling end of infusion
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3306—Optical measuring means
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • A61M2205/3389—Continuous level detection

Landscapes

  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (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 provide the syringe pump capable of injecting the liquid chemical sucked into a syringe at a prescribed speed to a living body by mechanically driving the piston of the syringe. CONSTITUTION:This syringe pump has at least the syringe, a syringe outside cylinder mounting part for mounting the outside cylinder of the syringe, a piston rod, a piston rod mounting part for mounting the rear end of this piston rod and a piston rod driving means. The syringe pump is provided with a sensor for detecting the moving state of the piston rod and a mark detectable by this sensor in the axial direction of the piston rod.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は、シリンジのピストンを
機械的に駆動して、シリンジ内に吸入した薬液を生体に
所定の速度で注入することができるシリンジポンプに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe pump capable of mechanically driving a piston of a syringe to inject a drug solution sucked into the syringe into a living body at a predetermined speed.

【０００２】[0002]

【従来技術】シリンジポンプは、装着したシリンジのピ
ストンをモータなどの機械的手段で駆動することによ
り、所定の流量でシリンジ内の薬液を生体内に注入する
ものであり、従来より精密な薬液注入のために使用され
ている。シリンジの装着は、外筒とピストンロッド後端
部をそれぞれ所定の装着部材に固定し、ピストンロッド
を装着した部材をモータなどで駆動して、ピストンを設
定した速度で前進させ薬液を注入する。シリンジポンプ
は、所定の流量で確実に薬液を生体内に注入するもので
あり、従来より精密な薬液注入のために使用されてい
る。シリンジポンプを使用する場合、適切な流量で確実
に薬液を注入することが安全性の点で重要であり、その
ためにはシリンジを所定の位置に正確にセットしなけれ
ばならない。もしもシリンジが適切にセットされていな
い場合には、正常な薬液注入ができないおそれがある。
本願出願人は、このような安全上の問題を解決するため
に、シリンジ外筒の装着異常を検出できる機構を考案
し、実願昭６２−９０３５４号（実公平３−３０１１５
号）として実用新案登録出願を行っている。2. Description of the Related Art A syringe pump is for injecting a drug solution in a syringe into a living body at a predetermined flow rate by driving a piston of a mounted syringe by a mechanical means such as a motor. Is used for. For mounting the syringe, the outer cylinder and the rear end of the piston rod are fixed to predetermined mounting members, and the member mounted with the piston rod is driven by a motor or the like to advance the piston at a set speed and inject the chemical liquid. The syringe pump surely injects the drug solution into the living body at a predetermined flow rate, and has been used for more precise drug solution injection than ever before. When using a syringe pump, it is important in terms of safety to reliably inject the drug solution at an appropriate flow rate, and for that purpose, the syringe must be accurately set in a predetermined position. If the syringe is not set properly, it may not be possible to inject the drug solution normally.
In order to solve such a safety problem, the applicant of the present invention has devised a mechanism capable of detecting a mounting abnormality of a syringe outer cylinder, which is disclosed in Japanese Patent Application No. 62-90354 (Japanese Utility Model Publication No. 3-30115).
No.) as a utility model registration application.

【０００３】[0003]

【発明が解決しようとする課題】本出願人が提案した上
記考案によれば、シリンジのフランジがフランジ溝から
外れてシリンジ台に乗るような装着異常を検知すること
はできるが、ピストンロッドが駆動部材に正常に装着さ
れていない場合、ピストンロッドの駆動部材は動いても
ピストンロッドは、まったく動かなかったり、あるいは
動いても設定した所定の速度とは異なる速度で動く恐れ
がある。このような異常状態の発生は、所定の流量で確
実に薬液を生体内に注入するというシリンジポンプの目
的が達成し得ないだけでなく、患者の安全上でも大きな
問題があり、ピストンロッドの装着異常の発生の検知も
重要な問題である。According to the above-mentioned invention proposed by the present applicant, it is possible to detect the mounting abnormality such that the flange of the syringe comes off the flange groove and gets on the syringe base, but the piston rod is driven. If not properly attached to the member, the piston rod drive member may move, but the piston rod may not move at all, or may move at a different speed than the set predetermined speed. The occurrence of such an abnormal state not only fails to achieve the purpose of the syringe pump of reliably injecting the drug solution into the living body at a predetermined flow rate, but also poses a serious problem for the safety of the patient. Detection of anomalies is also an important issue.

【０００４】[0004]

【課題を解決するための手段】前記のような問題を解決
するために、駆動部材に光センサなどのセンサを設置
し、ピストンロッドの後端部が駆動部材に正常な状態で
装着されているかどうかを検知する方法が考えられる。
このような方法でも装着異常を検知することはできるの
で一応の安全は確保できるが、ピストンが設定した速度
で動いているかどうかを検知することはできない。従来
は、ピストンの移動速度はこれを駆動するモータの回転
を検知することにより行っていたが、ピストンの移動状
態そのものを検知できれば、もっとも確実に薬液の注入
を検知できるので好ましい。従って、本発明は、ピスト
ンの移動状態そのものを検知することによりピストンロ
ッドの装着異常とピストンの駆動速度異常を検知できる
手段を有するシリンジポンプを提供することにより、前
記の技術課題を解決した。本発明のシリンジポンプにお
いては、ピストンロッドの移動状態を検知するセンサ、
および該センサにより検知可能な印をピストンロッドの
軸方向に所定間隔で設け、この印をセンサにより検知す
ることにより上記の目的を達成した。すなわち本発明
は、シリンジ、該シリンジの外筒を装着するシリンジ外
筒装着部、ピストンロッド、ピストンロッド後端部を装
着するピストンロッド装着部、および装着したピストン
ロッドを駆動するピストンロッド駆動手段を少なくとも
有するシリンジポンプにおいて、ピストンロッドの移動
状態を検知するセンサ、および該センサにより検知可能
な印をピストンロッドの軸方向に設けたものであること
を特徴とするシリンジポンプである。In order to solve the above problems, a sensor such as an optical sensor is installed on the driving member, and whether the rear end of the piston rod is normally mounted on the driving member. A possible method is to detect it.
Even with such a method, the mounting abnormality can be detected, so that a certain degree of safety can be secured, but it is not possible to detect whether or not the piston is moving at the set speed. Conventionally, the moving speed of the piston is determined by detecting the rotation of a motor that drives the piston. However, if the moving state of the piston itself can be detected, the injection of the chemical liquid can be detected most reliably, which is preferable. Therefore, the present invention has solved the above technical problem by providing a syringe pump having a unit capable of detecting abnormal mounting of a piston rod and abnormal driving speed of a piston by detecting the moving state of the piston itself. In the syringe pump of the present invention, a sensor that detects the moving state of the piston rod,
Further, the above-described object is achieved by providing marks detectable by the sensor at predetermined intervals in the axial direction of the piston rod and detecting the marks by the sensor. That is, the present invention provides a syringe, a syringe outer cylinder mounting portion for mounting an outer cylinder of the syringe, a piston rod, a piston rod mounting portion for mounting a rear end portion of the piston rod, and a piston rod driving means for driving the mounted piston rod. A syringe pump having at least a syringe pump having a sensor for detecting a moving state of a piston rod, and a mark detectable by the sensor in the axial direction of the piston rod.

【０００５】[0005]

【作用】本発明のシリンジポンプにおいては、ピストン
ロッドが正常に駆動されているときには、ピストンロッ
ドに所定間隔で設けた印が所定時間ごとにセンサの前を
通過することになるので、センサが設定した流量に対応
した時間間隔で印を検知する。ところが、ピストンロッ
ドが正常に駆動されない場合には、印がいつまでも検知
されないかあるいは検知される時間間隔が設定した流量
に対応した間隔とは異なることになるので、そのような
場合は異常と判断してピストンロッドを駆動するモータ
ーを停止したり、警報を発する。In the syringe pump of the present invention, when the piston rod is normally driven, the marks provided at predetermined intervals on the piston rod pass in front of the sensor at predetermined intervals, so the sensor is set. The mark is detected at time intervals corresponding to the specified flow rate. However, if the piston rod is not driven normally, the mark will not be detected forever, or the time interval for detection will be different from the interval corresponding to the set flow rate, so in such a case it is judged to be abnormal. Stop the motor that drives the piston rod, and issue an alarm.

【０００６】[0006]

【実施例】以下、図面にもとづいて本発明のシリンジポ
ンプの構成および動作をさらに具体的に説明する。図１
は、本発明のシリンジポンプの実施例について、その要
部を示す正面図であり、図２は、図１のＡ−Ａの位置で
切断した断面図である。シリンジ１の外筒２は、外筒押
さえ３によってシリンジポンプの本体に押しつけられる
とともに後端部の鍔１０を溝１１に嵌めて固定される。
また、ピストンロッド５の円板状の後端部６はピストン
ロッド装着部９の溝１２に嵌め込んで固定する。ピスト
ンロッド装着部９は、支持ロッド８にスライド可能に嵌
装されおり、モータ（図示せず）によって図の左右方向
に移動することができる。本実施例においては、ピスト
ンロッド５に線状の印４が軸方向に所定間隔で黒色イン
クで印刷されており、これを光センサ７で検知する。光
センサ７は、図２に示すように発光部１３と受光部１４
から構成されており、発光部１３より出た光が透明また
は半透明の合成樹脂で形成された断面十字のピストンロ
ッドの１片部を通過して受光部に入る光の量を電気的に
測定する。図１の例では、印４を黒色インクで印刷して
おり、印の部分では他の部分よりも光の透過量が低下
し、光電流が減少するので、印部分がセンサを通過する
と電気的なパルスが発生する。図１および２の例では、
ピストンロッドの４つの片部すべてに印を設けて、どの
片部でも使用できるようにしているが、１つの片部だけ
に印を設けることもできる。また、この例では印を印刷
するようにしたが、印を設ける部分の肉厚を薄くして
（溝を設ける）光の透過率が増大するようにしてもよい
し、逆にその部分を厚くして（突起を設ける）光の透過
率を減少させるようにすることもできる。図２の光セン
サは発光素子１３と受光素子１４とで形成されるギャッ
プ部分にピストンロッドを置いて検知するギャップ型フ
ォトセンサであるが、ピストンロッドの同一側に発光素
子１３と受光素子１４を設ける反射型フォトセンサも使
用することができる。該センサを使用する場合には、印
部分と印以外の部分の反射率を変えることによって検知
が可能である。ピストンロッド５が駆動されて移動する
と、印が光センサ７を通過するので、図１および２の例
ではセンサの受光部で印が通過するたびに受光量が低下
して電気的なパルスが発生する（実際のセンサからのパ
ルス間隔）。ピストンの移動速度は薬液の注入速度とシ
リンジ外筒の内径によって決まるので、シリンジがセッ
トされ薬液の注入速度が設定されると、印がセンサを通
過する時間間隔が計算できる（計算値のパルス間隔）。
この計算値のパルス間隔と実際のセンサからのパルス間
隔を比較回路、例えばコンパレーター回路により比較し
て、その差が一定以上になった場合には、注入が正常に
行われていないと判断して警報を発したり、またはピス
トンロッドを駆動するモーターを停止したりすることが
できる。また、上記の実施例では、印４を光学的に検知
するようにしたが、本発明はこれに限定されるものでは
なく、磁気的に検知する方法も可能である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction and operation of the syringe pump of the present invention will be described more specifically below with reference to the drawings. Figure 1
[Fig. 2] is a front view showing a main part of an embodiment of the syringe pump of the present invention, and Fig. 2 is a sectional view taken along the line AA in Fig. 1. The outer cylinder 2 of the syringe 1 is pressed against the body of the syringe pump by the outer cylinder retainer 3, and the collar 10 at the rear end is fitted into the groove 11 and fixed.
Further, the disc-shaped rear end portion 6 of the piston rod 5 is fitted and fixed in the groove 12 of the piston rod mounting portion 9. The piston rod mounting portion 9 is slidably fitted to the support rod 8 and can be moved in the left-right direction in the drawing by a motor (not shown). In this embodiment, linear marks 4 are printed on the piston rod 5 at a predetermined interval in the axial direction with black ink, and this is detected by the optical sensor 7. The optical sensor 7 includes a light emitting section 13 and a light receiving section 14 as shown in FIG.
And electrically measures the amount of light emitted from the light emitting part 13 through one piece of the piston rod having a cross-shaped cross section made of transparent or translucent synthetic resin and entering the light receiving part. To do. In the example of FIG. 1, the mark 4 is printed with black ink, and the amount of light transmission in the part of the mark is lower than that in the other parts, and the photocurrent is reduced. Pulse is generated. In the example of FIGS. 1 and 2,
All four pieces of the piston rod are marked so that any one of them can be used, but it is also possible to mark only one piece. Further, in this example, the mark is printed, but the thickness of the part where the mark is provided may be reduced (the groove is provided) to increase the light transmittance, or conversely, the part may be thickened. It is also possible to reduce the light transmittance (providing a protrusion). The optical sensor shown in FIG. 2 is a gap type photo sensor which detects by placing a piston rod in a gap portion formed by the light emitting element 13 and the light receiving element 14, but the light emitting element 13 and the light receiving element 14 are provided on the same side of the piston rod. A reflective photosensor provided can also be used. When the sensor is used, it is possible to detect it by changing the reflectance of the mark portion and the portion other than the mark portion. When the piston rod 5 is driven and moves, the mark passes through the optical sensor 7. Therefore, in the example of FIGS. 1 and 2, each time the mark passes in the light receiving portion of the sensor, the amount of light received decreases and an electrical pulse is generated. Yes (pulse interval from actual sensor). Since the moving speed of the piston is determined by the injection speed of the drug solution and the inner diameter of the syringe outer cylinder, when the syringe is set and the injection speed of the drug solution is set, the time interval for the mark to pass through the sensor can be calculated (calculated pulse interval ).
The calculated pulse interval and the actual pulse interval from the sensor are compared by a comparison circuit, such as a comparator circuit, and if the difference exceeds a certain level, it is determined that the injection is not normally performed. Can trigger an alarm or stop the motor that drives the piston rod. Further, although the mark 4 is optically detected in the above embodiment, the present invention is not limited to this, and a magnetically detecting method is also possible.

【０００７】[0007]

【発明の効果】本発明によれば、ビストンロッドそのも
のの移動を検知できるので、薬液が設定した流量で注入
されているかどうかを確実に検知することができ、安全
性の点で優れている。According to the present invention, since the movement of the Biston rod itself can be detected, it is possible to reliably detect whether or not the chemical liquid is being injected at the set flow rate, which is excellent in safety.

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

【図１】本発明の１実施例のシリンジポンプの要部の正
面図である。FIG. 1 is a front view of a main part of a syringe pump according to an embodiment of the present invention.

【図２】図１のＡ−Ａの位置で切断した断面図である。FIG. 2 is a sectional view taken along the line AA in FIG.

【符号の説明】[Explanation of symbols]

１ シリンジポンプ ２ シリンジ外筒 ３ シリンジ外筒押え ４ 線状の印 ５ ピストンロッド ６ ピストンロッドの円板状後端部 ７ 光センサ ８ 支持ロット ９ ピストンロッド装着部 １０ シリンジ外筒２の後端部鍔 １１ 溝 １２ 溝 １３ 発光部 １４ 受光部 1 Syringe pump 2 Syringe outer cylinder 3 Syringe outer cylinder retainer 4 Linear mark 5 Piston rod 6 Disc-shaped rear end of piston rod 7 Optical sensor 8 Support lot 9 Piston rod mounting part 10 Rear end of syringe outer cylinder 2 Tsuba 11 Groove 12 Groove 13 Light emitting part 14 Light receiving part

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 シリンジ、シリンジの外筒を装着するシ
リンジ外筒装着部、ピストンロッド、ピストンロッド後
端部を装着するピストンロッド装着部、およびピストン
ロッド駆動手段を少なくとも有するシリンジポンプにお
いて、ピストンロッドの移動状態を検知するセンサおよ
び該センサにより検知可能な印をピストンロッドの軸方
向に設けたものであることを特徴とするシリンジポン
プ。1. A syringe pump comprising at least a syringe, a syringe outer cylinder mounting portion for mounting an outer cylinder of the syringe, a piston rod, a piston rod mounting portion for mounting a rear end portion of the piston rod, and a piston rod driving means. A syringe pump characterized in that a sensor for detecting the moving state of the piston and a mark detectable by the sensor are provided in the axial direction of the piston rod. 【請求項２】 ピストンロッドの軸方向に設けたセンサ
により検知可能な印が、該部分の光透過率または光反射
率をピストンロッドの他の部分の光透過率または光反射
率とは異なるようにして形成されたものである請求項１
記載のシリンジポンプ。2. The mark which can be detected by a sensor provided in the axial direction of the piston rod is such that the light transmittance or light reflectance of the portion is different from the light transmittance or light reflectance of the other portion of the piston rod. 2. It is formed by
The syringe pump described. 【請求項３】 発光素子と、受光素子と、該受光素子よ
り出力される光電流の変化に基づいてピストンロッドの
装着異常および／またはピストンの駆動速度異常の発生
の有無を検知する手段とを有するフオトセンサ、およ
び、前記異常状態の発生を認識した場合にピストンロッ
ドを駆動するモーターを停止および／または警報を発生
させる手段に信号を発信する手段を有する請求項１また
は２記載のシリンジポンプ。3. A light emitting element, a light receiving element, and means for detecting the presence or absence of a piston rod mounting abnormality and / or a piston drive speed abnormality based on a change in the photocurrent output from the light receiving element. The syringe pump according to claim 1 or 2, further comprising: a photo sensor provided therein; and a device for transmitting a signal to a device for stopping a motor for driving a piston rod and / or for issuing an alarm when the occurrence of the abnormal state is recognized.
JP11098493A 1993-04-14 1993-04-14 Syringe pump Expired - Fee Related JP3381301B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11098493A JP3381301B2 (en) 1993-04-14 1993-04-14 Syringe pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11098493A JP3381301B2 (en) 1993-04-14 1993-04-14 Syringe pump

Publications (2)

Publication Number Publication Date
JPH06296690A true JPH06296690A (en) 1994-10-25
JP3381301B2 JP3381301B2 (en) 2003-02-24

Family

ID=14549460

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP3381301B2 (en)

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WO2008081540A1 (en) * 2006-12-28 2008-07-10 Sugan Co., Ltd. Syringe-like hand switch
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JP2005533568A (en) * 2002-07-24 2005-11-10 デカ・プロダクツ・リミテッド・パートナーシップ Optical deflection sensor for injection devices.
US20090224145A1 (en) * 2002-07-24 2009-09-10 Mandro Marc A Optical displacement sensor for infusion devices
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US8552361B2 (en) 2002-07-24 2013-10-08 Deka Products Limited Partnership Optical displacement sensor for infusion devices
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US10413677B2 (en) 2012-08-28 2019-09-17 Osprey Medical, Inc. Volume monitoring device
US11116892B2 (en) 2012-08-28 2021-09-14 Osprey Medical, Inc. Medium injection diversion and measurement
US11135375B2 (en) 2012-08-28 2021-10-05 Osprey Medical, Inc. Volume monitoring systems
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WO2015143058A1 (en) * 2014-03-21 2015-09-24 Osprey Medical, Inc. Syringe with optical system for monitoring the position of the plunger rod
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US11439765B2 (en) 2016-08-14 2022-09-13 Insulet Corporation Variable fill drug delivery device
US11633541B2 (en) 2017-01-19 2023-04-25 Insulet Corporation Cartridge hold-up volume reduction
US11229740B2 (en) 2017-03-07 2022-01-25 Insulet Corporation Very high volume user filled drug delivery device
US10973978B2 (en) 2017-08-03 2021-04-13 Insulet Corporation Fluid flow regulation arrangements for drug delivery devices
US11280327B2 (en) 2017-08-03 2022-03-22 Insulet Corporation Micro piston pump
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