EP3595740A1 - Injektor - Google Patents
InjektorInfo
- Publication number
- EP3595740A1 EP3595740A1 EP18711872.4A EP18711872A EP3595740A1 EP 3595740 A1 EP3595740 A1 EP 3595740A1 EP 18711872 A EP18711872 A EP 18711872A EP 3595740 A1 EP3595740 A1 EP 3595740A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- threaded spindle
- syringe
- longitudinal axis
- spindle
- injector
- 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- Withdrawn
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
-
- 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
- A61M2005/14506—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons mechanically driven, e.g. spring or clockwork
Definitions
- the invention relates to an injector for injecting a liquid from a syringe having a displaceable syringe plunger, the injector having a syringe receptacle for inserting the syringe and one of the syringes
- syringe receiving associated drive for the syringe plunger and the drive is designed as a spindle drive with a motor rotatable about its longitudinal axis threaded spindle and a threaded spindle arranged on the spindle nut.
- Such injectors are known and are used for example for
- DE 694 16 686 T2 discloses an injector with a drive designed as a spindle drive for actuating a syringe with displaceable syringe plunger inserted in the syringe holder.
- the object of the invention is therefore to propose an injector of the type mentioned, which can be handled particularly easily and quickly and overcomes the disadvantages of the prior art despite a simple mechanical structure.
- the embodiment of an injector with the features of claim 1 is proposed according to the invention.
- Through hole for the passage of the threaded spindle is formed, whose largest diameter extends transversely to the longitudinal axis of the threaded spindle and only in an end region of the largest diameter a partial thread is provided for engagement in the threaded spindle and the unlocking slide transversely to the longitudinal axis of the threaded spindle between an engagement position, in which the partial thread is in engagement with the threaded spindle and a release position in which the partial thread is not engaged with the threaded spindle, is displaceable.
- Entriegelungsschieber is in the engaged position, the partial thread engages the threaded spindle and thus enables the function of the drive as
- Entnegelungsschieber is in release position, is no interference of the
- Partial thread in the threaded spindle more before and the function of the Spindle drive is disabled, with the result that the Entriegelungsschieber and all other associated with this component along the longitudinal axis of the threaded spindle, for example, can be moved freely by hand. In this way, for example, a return of the drive after complete emptying one in the
- Syringe pickled syringe made by hand with great speed and ease of use.
- the unlocking slider is resiliently biased in the direction of the engagement position, so that this endeavor, in the threads of the threaded spindle in the manner of a spindle drive
- this state can be temporarily canceled against the elastic bias, such as the drive by hand
- the elastic bias of the Entriegelungsschiebers can be effected for example by a spring arrangement.
- the bias of the release slide is such that when a
- Engaged position is shifted to the release position against the elastic bias. Occurs, for example, during the feed of the spindle drive with befindlichem in the engaged position Entriegelungsschieber as a result
- this short-term displacement can be determined in the release position with appropriate sensors to a controller Signal overload situation and, for example, an automatic
- a half thread is preferably provided in one of the two end regions of the largest diameter within the slot in the unlocking slide.
- the threaded spindle is rotatably and fixedly mounted in the injector and the Entriegelungsschieber is arranged displaceable along the longitudinal axis of the threaded spindle and is connected to a partially pushed onto the threaded spindle torque tube, which is associated with the syringe plunger at the syringe receptacle.
- the push tube establishes the connection to the syringe plunger within the syringe inserted into the syringe receptacle and is rotated during rotation of the syringe
- the unlocking slide and the torque tube are added according to a proposal of the invention in a slidably guided along the longitudinal axis of the threaded sliding bridge, which along with the recorded unlocking slide along the longitudinal axis of the threaded spindle
- Entriegelungsschieber facing end is formed with a switching cam, by means of which the Entriegelungsschieber upon rotation of the torque tube about the longitudinal axis of the threaded spindle between the release and
- Engaging position is displaced.
- the torque tube receives so far a
- Dual function and not only serves to transmit power to the syringe plunger, but causes on rotation about its with the longitudinal axis of the threaded spindle coincident longitudinal axis rotation of the molded or mounted switching cam, whereby the release slide is displaced depending on the position of the switching cam in the engaged position or release position.
- the push tube therefore also assumes the function of the actuator for the displacement of the release slide from the engaged position to the release position and vice versa.
- the push tube may be formed at its end remote from the unlocking slide with a lever for rotating about the longitudinal axis of the threaded spindle, which facilitates the operation.
- Entriegelungsschiebers be provided and by means of this sensor a correlated with the release position and / or the engagement position measurement signal can be generated.
- Such a measurement signal can be evaluated, for example, by a control unit of the injector according to the invention to prevent commissioning of the drive in release position befindlichem unlocking slider, also output a corresponding alarm message in befindlichem in release position Entriegelungsschieber and at the already described and entering due to an overload situation skipping the in Engaging position located release slide in the
- next thread turn a shutdown of the drive and / or trigger an alarm.
- a microswitch or button in question for example, via a contact pin with the
- FIG. 1 shows a perspective view of an injector according to FIG.
- FIG. 2 shows a drive of the injector according to FIG. 1;
- FIG. 3 shows a section through the drive according to FIG. 2 in the engaged position;
- Figure 4 shows a section through the drive according to Figure 2 in
- Figure 5 is a plan view of a push rod of the drive according to Figure 2;
- Figure 6 shows the frontal view of the push rod of Figure 5
- Figures 7-9 show different views of the release slide according to
- Figure 10 is a view of a syringe according to the prior art.
- Embodiment of a medical injector can be seen in which parts of the otherwise provided panel have been removed for clarity.
- the injector shown in the illustrated embodiment of Figure 1 is not used for the injection of liquids from here
- the injector shown in FIG. 1 comprises a front wall 10 arranged in front of it, two syringe receptacles 13, 14 of substantially the same construction and a third syringe receptacle 15 into which appropriately configured syringes (not shown) filled with the liquids to be injected can be inserted and subsequently injected by a control device in the manner described below by drives 2 arranged between the front wall 10 and a rear wall 11 can be.
- marked third syringe receptacle is used, for example, the recording and injection of a required drug for the study, eg. B.
- Syringe receptacle 15 is assigned to be explained in more detail, without a
- FIG. 10 shows an example of such an embodiment of a syringe 4.
- the syringe 4 consists in a conventional manner of a syringe barrel 40 with a cone-shaped nozzle 44, to which a hose for connection to the
- Patient can be connected, and one at the nozzle 44th
- the displacement of the syringe plunger 41 is effected by pressure on the end-side pressure surface 43, wherein the
- Syringe cylinder 40 for generating a corresponding counter-pressure has a molded collar 42.
- the syringe receptacle 15 of the injector according to the illustration of Figure 1 is formed so that the syringe plunger 40 in the designed as a semi-cylindrical shell
- Syringe receptacle 15 can be inserted, wherein the collar 42 engages positively in a groove 150 of the syringe receptacle 5.
- a drive explained in more detail below in the direction of arrow I presses a contact surface 25 of the drive 2 in the desired manner on the pressure surface 43 of the syringe plunger 41 and causes the injection of the inside of the
- Syringe cylinder 40 stored liquid via the nozzle 44 in the direction of the patient.
- the drive 2 of the injector which causes the advancement of the contact surface 25 in the direction I, can be seen in more detail in Figures 2 to 4.
- the drive 2 comprises a threaded spindle 22 whose longitudinal axis A in
- Arrow direction I runs and which is formed with an external thread of a preferably small thread pitch.
- Arrow direction I runs and which is formed with an external thread of a preferably small thread pitch.
- Spindle pin 220 is formed, the torque-tight received in a sleeve 23 and can be driven by a gear 20 from an external drive motor, not shown, in order to rotate the threaded spindle 22 about its longitudinal axis A can.
- the drive 2 comprises one along cylindrical
- Guide rods 21 sliding sliding bridge 26, which may be made for example of an injection-molded plastic and a
- Guide rods 21 extend parallel to the longitudinal axis A and thus define a displaceability of the slide bridge 26 in and opposite to the direction of the arrow I.
- the sliding bridge 26 has, as shown in more detail in Figures 3 and 4, a receiving space 262, in which a closer
- the size of the receiving space 262 is dimensioned such that the unlocking slide 27 is displaceable transversely to the longitudinal axis A of the threaded spindle 22, d. H. in the illustrated embodiment in and opposite to the arrow V at right angles to the longitudinal axis A.
- the receiving space 262 with therein arranged Entriegelungsschieber 27 is closed by means of a screw 26 secured to the cover plate 264.
- the unlocking slide 27 which in turn may also be made of a suitable injection-molded plastic, has an approximately cuboidal basic body 270 with a one-sided molded
- the through hole 273 of the unlocking slider 27 is as
- Outer diameter of the threaded spindle 22 is selected and the larger
- the smaller diameter of the through hole 273 behaves to the larger diameter of the through hole 273 as 1: 1 .5, wherein the larger diameter in the direction of arrow V and thus extends transversely to the longitudinal axis A of the threaded spindle 22.
- an end region 274 of the largest diameter of the through hole 273 is adapted to the external thread of the threaded spindle 22
- Partial thread for example, a half-thread introduced as an internal threaded portion, which allows the unlocking slide 27 to engage as a spindle nut in the external thread of the threaded spindle 22 and upon rotation of the Threaded spindle 22 to be moved about its longitudinal axis A along this longitudinal axis A.
- the wall of the through hole 273 is made rather smooth in this area.
- receiving space 262 of the slide bridge 26 in two different positions, which correspond to two different switching states and are compared in Figures 3 and 4.
- the unlocking slider 27 is shown in an engaged position in which it is so far down in the direction of arrow V that the half-thread 274 of the through hole 273 engages in the external thread of the threaded spindle 22. If the threaded spindle 22 in the manner already explained by a motor about its longitudinal axis A in the corresponding
- unlocking slide 27 runs in this engaged position in the manner of a spindle nut on the threaded spindle 22 along the
- enveloping torque tube 24 is pushed, which is received with one end at the side of Entriegelungsschieber 27 adjacent also in the slide bridge 26 and is guided in the region of this end on the threaded spindle 22 with a slide bush 240 inserted.
- Clamping cone 30 carries the contact surface 25 for attack on the syringe plunger 43.
- Entriegelungsschiebers 27 lifted as a spindle nut on the threaded spindle 22 and the unit of Entriegelungsschieber 27, slide bridge 26 and push rod 24 can be, for example, after completion of a
- Position change required movement is effected in a particularly simple manner via the torque tube 24.
- the torque tube 24 as can be seen from the illustrations according to FIGS. 5 and 6, at its in the sliding bridge 26 recorded end designed as a switching cam 241 thickening, in the two diametrically opposed cylindrical portions 243 of larger diameter over two offset by 90 ° diametrically
- the thickening performed as switching cams 241 on the one hand causes the captive end-side receptacle of the torque tube 24 in the slide bridge 26, which for this purpose has a stepped bore 263 delimiting the receiving space 262, which engages behind the switching cam 241 coming to rest within the receiving space 262.
- the switching cam 241 but also causes the movement and positioning of the Entriegelungsschiebers 27 within the receiving space 262.
- the unlocking slider 27 has in the region of the underside of its projecting cantilever 271 adapted to the control cam 241 sliding surface 272, so by rotation of the torque tube 24 together with the in the receiving space 262 recorded cam 241 about the axis A of the unlocking slide 27 between its engaged position according to Figure 3 and its release position according to Figure 4 in and opposite to the arrow V is moved. If the sliding surface 272 bears against a straight edge 242 of the switching cam 241, this corresponds to the representation according to FIG. 3 and FIG
- Unlocking slide 27 is in the engaged position. Obtains
- Threaded spindle 22 coincident longitudinal axis rotated by 90 °, the cylindrical portion 243 of the switching cam 241 with a correspondingly larger radius on the sliding surface 272 of the Entriegelungsschiebers 27 and lifts it against arrow V from the engagement position shown in Figure 3 in the in Figure 4 shown release position, so that the threaded engagement with the threaded spindle 22 is released.
- the release slide 27 Upon renewed shift back of the torque tube 24 by 90 °, the release slide 27 returns to its engaged position according to FIG. 3
- the thrust tube 24 takes over a dual function, namely on the one hand the power transmission from serving as a spindle nut
- the contact surface 25 having the end of a lever 250 for rotating the torque tube 24 about its longitudinal axis, thus also about the longitudinal axis A of
- Threaded spindle 22 molded.
- the lever 250 with respect to the longitudinal axis diametrically opposite a hook 251 is further formed, the pressure surface 43 a in the
- Syringe receptacle 15 inserted syringe 4 surrounds.
- Spring chamber 282 arranged coil spring in the direction of arrow V on the
- Entriegelungsschieber 27 is resiliently biased. As appropriate
- An abutment is used on the upper side on the slide bridge 26 by means of screw 284 applied spring cover 283. Due to the elastically biased
- Contact pin 28 is also the unlocking slider 27 in the direction of arrow V on the threaded spindle 22 and thus resiliently biased to the engagement position shown in Figure 3 and by abutment of the cylindrical cam surface 243 of the control cam 241 on the sliding surface 272 against the spring force in the in the figure. 4 raised release position shown, however, endeavors to return to the engaged position shown in FIG.
- Entriegelungsschiebers 27 caused by deliberate operator intervention switching the Entriegelungsschiebers 27 between the engaged and released position of elastically so biased towards the engaged position Entriegelungsschieber 27 also provides an automatically acting overload protection of the drive 2. It comes during the injection or the injection causing extension of the push tube 24 in
- Direction of arrow I to a fault for example due to jamming of the syringe plunger 41 in the syringe barrel 40 or to a flow disturbance in the tube section between the nozzle 44 and the patient, threatens upon further rotation of the threaded rod 22 by the build-up in the direction of arrow R back pressure overloading the Drive 2 with the result of a possible mechanical damage or excessive pressure load for the patient.
- a fault for example due to jamming of the syringe plunger 41 in the syringe barrel 40 or to a flow disturbance in the tube section between the nozzle 44 and the patient.
- a contact pin 28 monitoring sensor 29 is further arranged in the form of a microswitch, at its terminals 290 signal lines of a control device not shown here for the injector can be connected.
- the Entriegelungsschieber In the unloaded switching state of the sensor 29 are the Entriegelungsschieber and this By a corresponding signal at the terminals 290 of the control device, the engagement position and thus operational readiness of the Entriegelungsschiebers 27 and the entire drive 2 can be signaled and carried out according to an injection.
- Entriegelungsschiebers 27 and the entire drive 2 are signaled and according to an injection can be prevented.
- the sensor 29 also registers the same in the same way
- Terminals 290 can during the injection process of
- Control device transmits the overload situation and from this an immediate shutdown of the drive and / or a corresponding
- Threaded spindle 22 motor to move back to the starting position, which is usually due to the prevailing low
- Thread pitch high speeds of the threaded spindle 22 and / or an undesirably long period of time would bring.
- the drive 2 provides an automatic and purely mechanical reliable overload protection, which is permanently active without external control intervention and independent of the energy supply, so that the greatest possible patient safety is achieved.
- the injector according to the invention can be made for the most part of non-magnetic materials, so that it can be safely placed in the vicinity of strong magnetic fields, such as an MRI device.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017105481.2A DE102017105481A1 (de) | 2017-03-15 | 2017-03-15 | Injektor |
PCT/EP2018/056047 WO2018166959A1 (de) | 2017-03-15 | 2018-03-12 | Injektor |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3595740A1 true EP3595740A1 (de) | 2020-01-22 |
Family
ID=61691461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18711872.4A Withdrawn EP3595740A1 (de) | 2017-03-15 | 2018-03-12 | Injektor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20200069868A1 (de) |
EP (1) | EP3595740A1 (de) |
CN (1) | CN110418655A (de) |
DE (1) | DE102017105481A1 (de) |
WO (1) | WO2018166959A1 (de) |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3428655A1 (de) * | 1984-08-03 | 1986-02-13 | Fresenius AG, 6380 Bad Homburg | Spritzenpumpe |
GB8525109D0 (en) * | 1985-10-11 | 1985-11-13 | Vickers Plc | Syringe pumps |
US5322511A (en) | 1992-04-21 | 1994-06-21 | Sterling Winthrop Inc. | Portable hand-held power injector |
US5242408A (en) * | 1992-09-23 | 1993-09-07 | Becton, Dickinson And Company | Method and apparatus for determining pressure and detecting occlusions in a syringe pump |
JP3120747B2 (ja) * | 1997-02-12 | 2000-12-25 | 富士電機株式会社 | シリンジポンプのクラッチ機構 |
DE19714711A1 (de) | 1997-04-09 | 1998-10-29 | Daum Gmbh | Injektor für medizinische Flüssigkeiten in der Kernspintomographie |
DE19717107B4 (de) * | 1997-04-23 | 2005-06-23 | Disetronic Licensing Ag | System aus Behältnis und Antriebsvorrichtung für einen Kolben, der in dem ein Medikamentfluid enthaltenden Behältnis gehalten ist |
JP2000300668A (ja) * | 1999-04-26 | 2000-10-31 | Takeshi Takachi | メカニカルロック機構およびその機構を用いたインジェクタヘッド |
US7553294B2 (en) * | 2002-05-30 | 2009-06-30 | Medrad, Inc. | Syringe plunger sensing mechanism for a medical injector |
US7534226B2 (en) * | 2005-09-26 | 2009-05-19 | M2 Group Holdings, Inc. | Dispensing fluid from an infusion pump system |
EP3260145B1 (de) * | 2008-04-09 | 2019-12-11 | Roche Diabetes Care GmbH | Fluidstandsensor für ein modulares, haut getragenes system zur flüssigkeitsabgabe |
ES2528596T3 (es) * | 2008-08-08 | 2015-02-10 | Mallinckrodt Llc | Inyector automático con función automática de autodirección de ariete |
EP2165722A1 (de) * | 2008-09-19 | 2010-03-24 | F.Hoffmann-La Roche Ag | Vorrichtung für die Produktverabreichung in einer medizinischen oder pharmazeutischen Anwendung |
US8812082B2 (en) * | 2008-10-30 | 2014-08-19 | Acist Medical Systems, Inc. | Automatically supplying a pressurizing unit of a medical injection device with fluid |
DK2391408T3 (en) * | 2008-12-31 | 2018-02-05 | Hoffmann La Roche | PORTABLE MEDICAL FLUID ADMINISTRATION WITH DRIVE SCREW LED CONNECTOR WITH CONTAINER STAMP |
FR2950811B1 (fr) * | 2009-10-02 | 2012-10-26 | Fresenius Vial | Procede de controle antibolus et dispositif correspondant |
CN103830785A (zh) * | 2012-11-20 | 2014-06-04 | 广州市暨华医疗器械有限公司 | 肝素泵 |
CN117018344A (zh) * | 2012-12-21 | 2023-11-10 | 德卡产品有限公司 | 注射泵系统 |
BR122016030038B1 (pt) * | 2012-12-21 | 2022-03-29 | Deka Products Limited Partnership | Sistema e aparelho para fixar uma seringa à bomba de seringa |
CN106421978B (zh) * | 2012-12-21 | 2020-03-24 | 德卡产品有限公司 | 注射泵系统 |
CA2955794A1 (en) * | 2014-07-21 | 2016-01-28 | Smiths Medical Asd, Inc. | Method and apparatus for overload protection in medicament syringe pumps |
-
2017
- 2017-03-15 DE DE102017105481.2A patent/DE102017105481A1/de not_active Withdrawn
-
2018
- 2018-03-12 US US16/494,140 patent/US20200069868A1/en not_active Abandoned
- 2018-03-12 WO PCT/EP2018/056047 patent/WO2018166959A1/de unknown
- 2018-03-12 CN CN201880018087.1A patent/CN110418655A/zh active Pending
- 2018-03-12 EP EP18711872.4A patent/EP3595740A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
CN110418655A (zh) | 2019-11-05 |
US20200069868A1 (en) | 2020-03-05 |
DE102017105481A1 (de) | 2018-09-20 |
WO2018166959A1 (de) | 2018-09-20 |
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