DE19714711A1 - Injection unit for contrast media used in NMR tomography - Google Patents

Injection unit for contrast media used in NMR tomography

Info

Publication number
DE19714711A1
DE19714711A1 DE1997114711 DE19714711A DE19714711A1 DE 19714711 A1 DE19714711 A1 DE 19714711A1 DE 1997114711 DE1997114711 DE 1997114711 DE 19714711 A DE19714711 A DE 19714711A DE 19714711 A1 DE19714711 A1 DE 19714711A1
Authority
DE
Germany
Prior art keywords
materials
contrast media
syringe
injection unit
media used
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.)
Withdrawn
Application number
DE1997114711
Other languages
German (de)
Inventor
Wolfgang Daum
Wolfgang Kloess
Patrick Scherr
Axel Winkel
Thomas Guenther
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.)
Mri Devices Daum 19061 Schwerin De GmbH
Original Assignee
Daum GmbH
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 Daum GmbH filed Critical Daum GmbH
Priority to DE1997114711 priority Critical patent/DE19714711A1/en
Publication of DE19714711A1 publication Critical patent/DE19714711A1/en
Withdrawn legal-status Critical Current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
    • A61M5/1456—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir comprising a piston rod to be moved into the reservoir, e.g. the piston rod is part of the removable reservoir
    • 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
    • A61M5/1458—Means for capture of the plunger flange

Abstract

The unit injects medicinal fluids, especially contrast media required in nuclear magnetic resonance (NMR) tomography. The entire unit can be placed in the region of significant field of the equipment, without appreciable generation of image anomalies. Preferably it is made of plastic and/or metals of low magnetic susceptibility, e.g. alloys of titanium, tantalum, nickel and aluminium; ceramics, especially alumina can be used.

Description

Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Anspruch 1.The invention relates to a device according to the preamble of claim 1.

Seit langem sind Kontrastmittel für die Kernspintomographie bekannt. Hier werden vor allen Dingen gadoliniumhaltige Substanzen genutzt. Zur Injektion von Kontrastmitteln werden im allgemeinen sogenannte Injektionsapparate genutzt. Diese injizieren automatisch mittels eines Katheters und einer Kanüle das Kontrastmittel und eventuell ein Basismittel wie Natriumchloridlösung in das entsprechende Gefäß des menschlichen Körpers.Contrast media for magnetic resonance imaging have been known for a long time. Above all, here substances containing gadolinium. Contrast agents are generally injected so-called injection devices used. These automatically inject using a catheter and a Cannula the contrast agent and possibly a basic agent such as sodium chloride solution into the corresponding Vessel of the human body.

In der Kernspintomographie werden jedoch äußerst hohe Magnetfelder zum Bildaufbau genutzt die es nicht erlauben, herkömmliche Kontrastmittelinjektoren zu nutzen, da diese aufgrund ihrer magnetischen Materialien entweder stark defklektiert werden oder Bildverzerrungen, sogenannte Artefakte, erzeugen. Das Problem, welches diese Erfindung versucht zu lösen, besteht in dem Nichtvorhandensein eines kernspintauglichen Injektors für medizinische Flüssigkeiten.In magnetic resonance imaging, however, extremely high magnetic fields are used to build up the image do not allow to use conventional contrast medium injectors, because of their magnetic materials are either highly deflected or image distortions, so-called Artifacts. The problem that this invention attempts to solve is that Absence of an MRI medical fluid injector.

Die Erfindung löst das Problem durch das Nutzen von nichtmagnetischen Materialien einer geringen magnetischen Suszeptibilität zum Aufbau des Injektors.The invention solves the problem by using non-magnetic materials of a small amount magnetic susceptibility to build the injector.

Die Erfindung wird in der folgenden Figur erläutert:The invention is illustrated in the following figure:

Fig. 1 Darstellung des erfinderischen MR-Injektors. Fig. 1 representation of the inventive MR injector.

Zwei Spritzen befinden sich in je einer Spritzenaufnahme. In der einen Spritze befindet sich das kernspintaugliche, meist auf Gadolinium basierende Kontrastmittel, in der anderen Spritze befindet sich eine Basislösung, wie z. B. Natriumchlorid zum Spülen des Katheters und Vorschieben des Kontrastmittelbolus durch den Katheter. Angetrieben werden die beiden Spritzen durch einen Stempel an ihrer Austrittsöffnung. Dieser Stempel wird über eine Spindel durch einen Motor angetrieben. Charakteristisch für den Motor ist, daß dieser kernspintauglich ist. Ein solcher Motor ist in der Patentanmeldung 197 09 267.5 beschrieben.There are two syringes in each syringe holder. That is in one syringe Contrast agents suitable for nuclear spin, mostly based on gadolinium, in the other syringe a basic solution, such as B. sodium chloride for rinsing the catheter and advancing the Contrast agent bolus through the catheter. The two syringes are driven by a stamp at their exit opening. This stamp is driven by a motor via a spindle. It is characteristic of the motor that it is suitable for nuclear spin. Such an engine is in the Patent application 197 09 267.5 described.

Fig. 1 zeigt die erfinderische Lösung von einer unteren Ansicht, Fig. 2 von einer oberen Aufsicht. Die mit Kontrastmittel gefüllten Spritzen 1 liegen in der Halterung 2, die aus einem vorderen Teilstück 2a und einem hinteren Teilstück 2b bestehen. In der Fig. 2 ist gezeigt, wie die Spritze in der Halterung liegt. Nicht gezeigt ist der Stempel der Spritze, der in einer Halterung 8 liegt die wiederum als Nut in einem Stempel 4 gefertigt ist. Der Stempel 4 kann mittels des Motors 3 und einer Achse 5 mittels eines Zahnrades 6 bewegt werden. Dadurch wird die Spritze ausgedrückt. An der Vorderseite der Spritze 9 befindet sich der Auslaß. Die Achse wird durch den in der Patentanmeldung 197 05 267.5 beschriebenen Motor bewegt. Über eine optische Kontrolle, z. B. als Gray code, kann die Position des Motors bestimmt werden. Fig. 1 shows the inventive solution from a lower view, Fig. 2 from an upper view. The syringes 1 filled with contrast medium lie in the holder 2 , which consist of a front section 2 a and a rear section 2 b. In FIG. 2 it is shown how the syringe is in the holder. Not shown is the stamp of the syringe, which is located in a holder 8 , which in turn is made as a groove in a stamp 4 . The punch 4 can be moved by means of the motor 3 and an axis 5 by means of a gear 6 . This will push the syringe out. The outlet is at the front of the syringe 9 . The axis is moved by the motor described in patent application 197 05 267.5. Via an optical control, e.g. B. as a gray code, the position of the motor can be determined.

Jede Einheit, bestehend aus Spritze, Motor, Achse und Stempel ist zweimal im Kontrastmittelinjektor vorhanden, einmal für das Kontrastmittel, einmal für das Spülmittel, z. B. Natriumchlorid. Alle Außenwände 7 bestehen z. B. aus Kunststoff, die vordere und Rückwand 2a und 2b z. B. aus Aluminium, die Achse 5 aus Aluminium, der Stempel 4 aus Aluminium, die Zahnräder 6 aus Titan. Gezeigt ist nur eine Spritze zur Vereinfachung. Eine Kupplung 10 verhindert, daß bei einem versehentlichen mechanischen Ausflußverschluß die Spritze stetig weiter gedrückt wird. Ab einer bestimmten Kraft dreht aufgrund dieser Kupplung der Motor durch, ohne die Achse zu bewegen. Each unit, consisting of syringe, motor, axis and plunger, is present twice in the contrast medium injector, once for the contrast medium, once for the detergent, e.g. B. sodium chloride. All outer walls 7 are z. B. made of plastic, the front and rear wall 2 a and 2 b z. B. made of aluminum, the axis 5 made of aluminum, the punch 4 made of aluminum, the gears 6 made of titanium. Only one syringe is shown for simplification. A clutch 10 prevents the syringe from being pressed further and further in the event of an accidental mechanical outflow closure. Above a certain force, the motor turns due to this clutch without moving the axis.

BezugszeichenlisteReference list

11

Kontrastmittelspritze
Contrast agent syringe

22nd

Halterung
bracket

33rd

Motor (Ultraschallmotor)
Motor (ultrasonic motor)

44th

Stempel
stamp

55

Achse
axis

66

Zahnrad
gear

77

Deckplatten
Cover plates

88th

Nut für Spritzenstempel
Groove for syringe stamp

99

Vorderseite der Spritze
Front of the syringe

1010th

Kupplung
clutch

Claims (6)

1. Injektor zur Injektion medizinischer Flüssigkeiten, insbesondere Kontrastmittel in der Kernspintomographie, dadurch gekennzeichnet, daß dieser aus Materialien derart gefertigt ist, daß das gesamte Gerät in das signifikante Magnetfeld des Tomographen plaziert werden kann, ohne daß nennenswerte Bildartfakte auftreten.1. Injector for the injection of medical fluids, in particular contrast media in magnetic resonance imaging, characterized in that it is made of materials such that the entire device can be placed in the significant magnetic field of the tomograph without significant image artifacts occurring. 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Materialien Kunststoffe genutzt werden.2. Device according to claim 1, characterized in that plastics are used as materials. 3. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Materialien Metalle niederer magnetischer Suszeptibilität genutzt werden.3. Device according to claim 1, characterized in that metals of low magnetic susceptibility are used as materials. 4. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Materialien Legierungen aus Titan, Tantal, Nickel und Aluminium genutzt werden.4. The device according to claim 1, characterized in that Alloys of titanium, tantalum, nickel and aluminum are used as materials. 5. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß als Materialien Keramiken, insbesondere Al2O3 genutzt werden.5. The device according to claim 1, characterized in that ceramics, in particular Al 2 O 3 , are used as materials. 6. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein kernspintauglicher Motor, beispielsweise ein Ultraschallmotor nach der Patentanmeldung 197 09 267.5 zum Antrieb genutzt wird.6. The device according to claim 1, characterized in that a motor suitable for nuclear spin, for example an ultrasonic motor according to the patent application 197 09 267.5 is used for the drive.
DE1997114711 1997-04-09 1997-04-09 Injection unit for contrast media used in NMR tomography Withdrawn DE19714711A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1997114711 DE19714711A1 (en) 1997-04-09 1997-04-09 Injection unit for contrast media used in NMR tomography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1997114711 DE19714711A1 (en) 1997-04-09 1997-04-09 Injection unit for contrast media used in NMR tomography

Publications (1)

Publication Number Publication Date
DE19714711A1 true DE19714711A1 (en) 1998-10-29

Family

ID=7825946

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1997114711 Withdrawn DE19714711A1 (en) 1997-04-09 1997-04-09 Injection unit for contrast media used in NMR tomography

Country Status (1)

Country Link
DE (1) DE19714711A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6881043B2 (en) 2001-01-28 2005-04-19 Medrad, Inc. Injection apparatus incorporating clamping and squeezing members for pumping liquid through flexible tubing
US7267661B2 (en) 2002-06-17 2007-09-11 Iradimed Corporation Non-magnetic medical infusion device
US7315109B1 (en) 2003-08-15 2008-01-01 Medrad, Inc. Actuators and fluid delivery systems using such actuators
US7384408B2 (en) 2001-04-04 2008-06-10 Caesarea Medical Electronics Ltd. Flow set including an identifying key member having two projections cooperating to define a unique code
US7404809B2 (en) 2004-10-12 2008-07-29 Iradimed Corporation Non-magnetic medical infusion device
US7540854B2 (en) 2001-07-10 2009-06-02 Medrad, Inc. Method of substituting a first fluid delivery device with a second fluid delivery device
US7553295B2 (en) 2002-06-17 2009-06-30 Iradimed Corporation Liquid infusion apparatus
US8105282B2 (en) 2007-07-13 2012-01-31 Iradimed Corporation System and method for communication with an infusion device
CN105107053A (en) * 2015-09-07 2015-12-02 张明 Full automatic mix push injection pump
DE102017105481A1 (en) 2017-03-15 2018-09-20 Medtron Ag injector
US11268506B2 (en) 2017-12-22 2022-03-08 Iradimed Corporation Fluid pumps for use in MRI environment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765335A (en) * 1987-03-16 1988-08-23 Intermar, Inc. Aneurysm clip
EP0584531A2 (en) * 1992-08-17 1994-03-02 Medrad Inc. Front-loading medical injector and syringe for use therewith
US5388580A (en) * 1992-08-19 1995-02-14 The United States Of America As Represented By The Department Of Health And Human Services Head holder for magnetic resonance imaging/spectroscopy system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4765335A (en) * 1987-03-16 1988-08-23 Intermar, Inc. Aneurysm clip
EP0584531A2 (en) * 1992-08-17 1994-03-02 Medrad Inc. Front-loading medical injector and syringe for use therewith
US5388580A (en) * 1992-08-19 1995-02-14 The United States Of America As Represented By The Department Of Health And Human Services Head holder for magnetic resonance imaging/spectroscopy system

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6881043B2 (en) 2001-01-28 2005-04-19 Medrad, Inc. Injection apparatus incorporating clamping and squeezing members for pumping liquid through flexible tubing
US7384408B2 (en) 2001-04-04 2008-06-10 Caesarea Medical Electronics Ltd. Flow set including an identifying key member having two projections cooperating to define a unique code
US8025654B2 (en) 2001-04-04 2011-09-27 Medrad, Inc. Method of identifying a flow set for use with a pump
US7540854B2 (en) 2001-07-10 2009-06-02 Medrad, Inc. Method of substituting a first fluid delivery device with a second fluid delivery device
US7267661B2 (en) 2002-06-17 2007-09-11 Iradimed Corporation Non-magnetic medical infusion device
US7553295B2 (en) 2002-06-17 2009-06-30 Iradimed Corporation Liquid infusion apparatus
US7753882B2 (en) 2002-06-17 2010-07-13 Iradimed Corporation Non-magnetic medical infusion device
US8690829B2 (en) 2002-06-17 2014-04-08 Iradimed Corporation Non-magnetic medical infusion device
US8150493B2 (en) 2002-06-17 2012-04-03 Iradimed Corporation Patient infusion and imaging system
US7315109B1 (en) 2003-08-15 2008-01-01 Medrad, Inc. Actuators and fluid delivery systems using such actuators
US7404809B2 (en) 2004-10-12 2008-07-29 Iradimed Corporation Non-magnetic medical infusion device
US8262642B2 (en) 2004-10-12 2012-09-11 Iradimed Corporation IV fluid infusion assembly
US8469932B2 (en) 2005-11-10 2013-06-25 Iradimed Corporation Liquid infusion apparatus
US9878089B2 (en) 2005-11-10 2018-01-30 Iradimed Corporation Liquid infusion apparatus
US11045600B2 (en) 2005-11-10 2021-06-29 Iradimed Corporation Liquid infusion apparatus
US10821223B2 (en) 2005-11-10 2020-11-03 Iradimed Corporation Liquid infusion apparatus
US9861743B2 (en) 2007-07-13 2018-01-09 Iradimed Corporation System and method for communication with an infusion device
US8500694B2 (en) 2007-07-13 2013-08-06 Iradimed Corporation System and method for communication with an infusion device
US10617821B2 (en) 2007-07-13 2020-04-14 Iradimed Corporation System and method for communication with an infusion device
US8105282B2 (en) 2007-07-13 2012-01-31 Iradimed Corporation System and method for communication with an infusion device
US11291767B2 (en) 2007-07-13 2022-04-05 Iradimed Corporation System and method for communication with an infusion device
CN105107053B (en) * 2015-09-07 2018-01-12 张明 Pump is injected in a kind of full-automatic mixing
CN105107053A (en) * 2015-09-07 2015-12-02 张明 Full automatic mix push injection pump
DE102017105481A1 (en) 2017-03-15 2018-09-20 Medtron Ag injector
WO2018166959A1 (en) 2017-03-15 2018-09-20 Medtron Ag Injector
US11268506B2 (en) 2017-12-22 2022-03-08 Iradimed Corporation Fluid pumps for use in MRI environment

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8139 Disposal/non-payment of the annual fee
8127 New person/name/address of the applicant

Owner name: MRI DEVICES DAUM GMBH, 19061 SCHWERIN, DE