DE202019104908U1 - Pen-like syringe system - Google Patents

Abstract

Pen-like syringe system (1) comprising a syringe holder (2) for receiving a syringe (3) having a syringe body (4) and a plunger (5) movably guided in the syringe body (4), and a drive housing (2) connected to the syringe holder (2). 8) in which an electrical delivery device (9) operated by an integrated power supply (10) for the pneumatic application of pressure or negative pressure to the piston (5) of a syringe (3) inserted in the syringe holder (2) is arranged, the delivery device (9 ) is connected via a drive channel (13) to the piston (5) of a syringe (3) introduced into the syringe holder (2) and can be actuated via a button (16) arranged on the syringe system (1), characterized by a venting channel (15) having a first end which is connected to the drive channel (13), and a second end which is connected to the environment via an opening (17), the opening (17) when actuated de s button (16) can be locked.

Description

The invention relates to a pen-like syringe system according to the preamble of claim 1.

In medicine, syringe systems are used in numerous and different areas of application. In addition to general requirements that are intended to ensure the reliability and safety of the syringe systems, for example, user-friendliness, especially safe and advantageous holding, guiding and actuation of the syringe system, are also important.

From the European patent EP 0 810 890 B1 shows a pen-like, electronic syringe system with an elongated housing. In this case, an ampoule with a syringe plunger guided displaceably therein can be introduced into a front region of the syringe system. The syringe plunger is actuated via a battery-operated drive system. The operation of the syringe system is controlled via control switches.

The US patent application US 2018/132990 A1 shows a syringe system, wherein liquid is conveyed by a pump from a liquid container attached to the device to a needle provided for dispensing the liquid.

The object is to provide an ergonomic syringe system with a syringe holder provided for a syringe, which enables simple and safe holding, guiding and operation of the syringe system, in particular regardless of the size of the operator's hand, safe and targeted injection of a substance or enables the removal of a substance, in particular an injection into or removal from a human or animal body, and thereby prevents possible contamination of the substance to be injected or removed and ensures easy insertion and removal of a syringe into the syringe holder.

A syringe is a device that has a syringe body (or primary container), in particular a cylindrical syringe body, in which a piston (in particular without a piston rod) is movably guided and which has a connection device, for example a nozzle and at the front (proximal) end / or has a cannula to understand. The term syringe also includes so-called carpules and cylindrical ampoules with a pierceable membrane at their front (proximal) end.

The object is achieved with a pen-like syringe system with the features of claim 1. Appropriate configurations and advantageous developments of the invention can be found in the subclaims.

A pen-like syringe system is to be understood as meaning an essentially elongated syringe system which can be held in one hand by an operator like a pen. The pen-like syringe system is usually held, guided and operated by two fingers (the term finger also including the thumb in the following), in particular between thumb and index finger, or by three fingers, in particular between thumb, index finger and middle finger.

The pen-like syringe system according to the invention comprises a syringe holder which is designed to hold a syringe. A syringe that can be introduced into the syringe holder has a syringe body, in particular a cylindrical syringe body, and a plunger which is movably guided in the syringe body. At its front (proximal) end, the syringe can have a conical or (circular) cylindrical nozzle or a connection device, in particular a Luer connection (Luer lock, Luer slip), and / or a cannula. The pen-like syringe system further comprises a drive housing connected to the syringe holder. The syringe holder forms the front (proximal) part and the drive housing forms the rear (distal) part of the syringe system. In the drive housing, an electrical conveyor device operated by an integrated power supply is arranged for (pneumatically) applying pressure or negative pressure to the plunger of a syringe introduced into the syringe holder. The conveying device is connected (pneumatically) via a drive channel to the piston of a syringe introduced into the syringe holder and can be actuated via a button arranged on the syringe system. According to the invention, the pen-like syringe system has a ventilation channel with a first end connected to the drive channel and a second end connected to the surroundings via an opening, the opening being closable when the button is actuated.

The syringe system can be used especially for medical purposes, especially for ophthalmology. The syringe system can consist of materials suitable for medical purposes, in particular plastics suitable for medical purposes. This enables simple sterilization, for example by means of steam or X-ray or UV radiation or ethylene oxide.

The pen-like syringe system according to the invention provides an ergonomic syringe system which, in addition to simple and secure holding and guiding, enables simple and advantageous operation of the syringe system, in particular regardless of the size of the operator's hand. The syringe system ensures a safe and targeted injection of a substance or the removal of a substance, in particular into or from a human or animal body. The pen-like syringe system can be held like a pen between thumb and index finger or between thumb, index finger and middle finger. The syringe system can be held, guided and operated in particular near the front end, facing away from the drive housing, of a syringe introduced into the syringe receptacle, for example near a cannula of the syringe. This results in safe and good guidance of the syringe system and simple handling of the syringe system. A possibly required change in a position of the syringe system during an injection or during a withdrawal, especially a change in the position of the tip of a cannula, for example by withdrawing or inserting the cannula tip into human or animal tissue, is simple and advantageous, and in particular possible both with an injection and with a substance withdrawal. A change in the position of the syringe system or a cannula tip is necessary, for example, in the field of ophthalmology if a perfluorocarbon bubble is to be placed in the eye.

The button can be actuated, for example, using the index finger. For an injection or removal of a substance, only the force required to actuate the button needs to be applied. Compared to conventional syringes, which require manual actuation of a piston rod connected to the plunger of the syringe, the pen-like syringe system is simple and pleasant to use. In particular, no great force has to be applied to actuate the syringe system or no strong pressure is required. This ensures that the syringe system is held and guided securely, in particular also during an injection or removal. It is also conceivable that the force to be applied to actuate the button can be adjusted via a device arranged on the syringe system, for example as a function of the force to be applied desired by an operator to actuate the button. Likewise, the force acting on the piston and thus the injection and removal speed can also be limited by a device.

In the syringe system according to the invention, apart from the application of pressure or negative pressure to the piston, there is no further media connection with the piston, for example by a piston rod or by a hydraulic delivery medium etc. There is no risk of possible contamination of a substance to be injected or withdrawn which, apart from the interior of the syringe body, is only connected to the plunger of the syringe.

Furthermore, the design of the pen-like syringe system, in particular the application of pressure or negative pressure to the plunger of a syringe inserted into the syringe holder by the conveying device actuated via the button, enables exact dosing of the injection or the removal of a substance. Injection in any dose is possible, for example drop by drop or in a continuous flow. In particular, continuous injection is ensured without the plunger hooking, which occurs in known syringe systems, for example due to inhomogeneous siliconization of the syringes and / or due to the plunger sticking or sticking to the syringe body. The same applies to the removal of a substance.

The plunger of a syringe introduced into the syringe receptacle of the syringe system according to the invention is only subjected to pressure or negative pressure if the opening arranged at the second end of the ventilation channel is closed. Otherwise, the drive channel, which is connected to the first end of the ventilation channel, for example via a connection piece designed as a T-piece, is in communication with the environment. Applying pressure or negative pressure to the plunger and thus moving the plunger relative to the syringe body is thereby prevented or stopped immediately. The design of the syringe system thus ensures an immediate or immediate termination of an injection or withdrawal as soon as the pushbutton is actuated or the opening of the ventilation channel is not or no longer closed. An immediate release of a pressure or negative pressure previously acting on the piston takes place via the ventilation channel. A possible "running after" or dripping after an injection or a withdrawal of a substance due to an otherwise existing pressure reservoir is therefore not possible.

In a preferred embodiment of the syringe system, the opening of the ventilation channel can be closed when the button is actuated by a finger actuating the button. In the event of a non-intended or improper actuation of the button, for example if the button is accidentally touched or, for example, if the button provided for actuating the button is not positioned correctly Finger or improper handling of the syringe system, the opening of the ventilation channel is not closed. An unwanted or uncontrolled application of pressure or negative pressure to the piston or an unwanted or uncontrolled injection or withdrawal is thus prevented. In a particularly preferred embodiment, the opening can be automatically closed by the finger when the pushbutton is operated manually with a finger. The opening of the ventilation channel is in particular placed in such a way that the operator closes it when the button is properly actuated and the syringe system is properly handled. In addition to the advantages mentioned above and the structural advantages of such a configuration, this also ensures proper handling of the syringe system. By closing the opening of the ventilation channel with a finger actuating the button, the termination of an injection or withdrawal is guaranteed immediately upon termination of the actuation of the button by the finger actuating the button and thus a safe injection or removal without any lag effects.

In an advantageous embodiment, the electrical delivery device can be a diaphragm pump and / or the plunger of a syringe inserted into the syringe holder can be acted upon with air. The membrane pump forms a micropneumatic system or part of a micropneumatic system integrated in the syringe system. The use of a diaphragm pump and the use of air as the driving medium enable the piston to be actuated in a particularly simple and advantageous manner. A mechanical device that is connected to the piston to move it is not required here. By using the diaphragm pump and applying air to the piston, there is no need for complex and error-prone gears between the delivery device and the piston. Diaphragm pumps are also very robust and insensitive to malfunctions.

The drive housing preferably has at least one supply opening or a supply channel connected to the conveying device for connecting the conveying device to the environment or a gas reservoir. This ensures that the delivery device, in particular a diaphragm pump, is adequately supplied with air or a gas (mixture) located in a gas reservoir. In particular, this also prevents the build-up of a pressure or negative pressure occurring in the drive housing when the delivery device is actuated. The supply opening is preferably arranged on the drive housing in such a way that it is not closed when the syringe system is used by the operator's hand. It is also conceivable that the supply opening or the supply channel has a filter element, for example for cleaning the air used as the conveying medium.

In a particularly preferred embodiment, the syringe holder is hinged to the drive housing in a foldable manner. This enables a syringe to be inserted and removed particularly simply and quickly into and out of the syringe holder. In particular, by inserting or removing a syringe into the syringe receptacle, there is no laborious transferring of a substance into or from a tip firmly connected to the syringe system and the associated problems, for example the risk of possible contamination of a tip to be injected or removed Substance, given. Particularly preferably, the drive housing or the syringe holder can have a locking lever for the releasable fastening of the syringe holder to the drive housing, or vice versa. In an alternative embodiment, the syringe holder can be detachably connected to the drive housing via a bayonet lock or via a thread. Both the locking lever and the bayonet lock and the thread provide a structurally simple, robust and user-friendly design of the syringe system, which enables simple locking and unlocking of the connection between the syringe holder and the drive housing and thus quick and easy insertion and removal of a Allows syringe into or out of the syringe holder. For a tight connection, in particular for a gas-tight or airtight connection, of the drive housing with the syringe holder or a syringe introduced into the syringe holder, the drive housing can have a sealing element at its front (proximal) end, in particular an O-ring.

Advantageously, the syringe holder can be at least partially transparent and / or have at least one laterally arranged window through which a syringe arranged in the syringe holder is at least partially visible. In this way, in particular the fill level of the syringe or the progress of an injection or withdrawal that is taking place can be observed. For example, a withdrawn substance or air bubbles etc. possibly present in the syringe are also visible, which indicate existing leaks or other difficulties during the injection or withdrawal, which means that corrections or, if necessary, the injection or withdrawal can be made.

In a preferred embodiment of the syringe system, the button on the Syringe holder be arranged, in particular near the front end of the syringe holder facing away from the drive housing. The resulting arrangement of the fingers used to operate the syringe system near the front end of the syringe, for example near a cannula attached to the syringe, enables the syringe system to be guided safely, in particular when the button is actuated at the same time.

In an advantageous embodiment, the opening of the ventilation channel can be arranged in the button or the syringe holder can have a lowered area in which the button and the opening of the ventilation channel are arranged, the opening of the ventilation channel being essentially in the direction of the drive housing and syringe holder extending longitudinal direction of the syringe system, in particular in the direction of the front end of the syringe holder, and the actuation of the button takes place perpendicular to the longitudinal direction. An opening provided in the button can in particular point upwards, i.e. in the actuation direction or direction of movement of the finger actuating the button. The described configurations and arrangements of the opening provide a syringe system in which it is ensured that the opening of the ventilation channel is (automatically) closed when the button is actuated by a finger actuating the button.

In a further advantageous embodiment, the syringe system can be designed to be heatable in the area of the syringe holder. Such a configuration is advantageous, for example, when injecting substances with a higher viscosity, in order to facilitate an injection by heating the substance to be injected.

The syringe system can preferably be designed as a self-contained, compact syringe system. There are no lines or similar connections connected to the syringe system, which would be a hindrance or disruptive when using or handling the syringe system. The compact design in particular provides a safe, ergonomically advantageous and user-friendly syringe system. The closed construction is advantageous, for example, to prevent contamination of the syringe system, especially contamination of the interior of the syringe system, by external influences.

The integrated power supply can advantageously be a battery or an accumulator which is arranged in or on the drive housing. For example, the integrated power supply can be incorporated in a receptacle arranged at the rear (distal) end of the drive housing, that is to say at the end of the drive housing facing away from the syringe receptacle. The receptacle for the integrated power supply is preferably easily accessible from the outside. This enables, for example, a simple exchange of a battery used as an integrated power supply. In a particularly advantageous embodiment, the syringe system can have a connection element for charging the integrated power supply, especially for charging an accumulator used as an integrated power supply. The connection element can in particular be a USB connection. The connection element is preferably arranged in the drive housing. The use of an integrated power supply provides a syringe system that does not require any external connections, in particular power cables, etc. which would impair or interfere with the use or handling of the syringe system. In a further advantageous embodiment, the integrated power supply, in particular accumulators used as an integrated power supply, can be arranged in a separate power supply unit, which can be detachably connected to the syringe holder or the drive housing via a quick release system, for example by clicking on it. This enables the integrated power supply to be exchanged more quickly and also to recharge batteries used as an integrated power supply independently of the syringe system. The power supply unit can be arranged, for example, in different, ergonomically favorable positions of the syringe system. In addition to an arrangement of the power supply unit on the rear (distal) end of the drive housing, a lateral arrangement of the power supply unit on the syringe system or the drive housing is also conceivable. In particular, separate configurations for right-handed and left-handed people are also conceivable, with the power supply unit being arranged on different sides of the syringe system.

In an advantageous embodiment, the syringe system can have a device for setting or limiting the pressure or negative pressure provided by the delivery device, in particular the injection rate and / or the withdrawal rate caused thereby. This enables the syringe system or the performance of the delivery device to be adapted to the respective requirements of an injection or withdrawal. It is also conceivable that the syringe system has a device, in particular a switch, by means of which pressure or negative pressure can be selectively applied to the piston. This results in a syringe system that can be used both for injection and for withdrawal.

The syringe system can preferably be a display element for direct or indirect display the pressure or negative pressure acting on the piston or the force acting on the piston and / or to display the charge status of the integrated power supply. Particularly preferably, the display device can be an optical display that shows the performance of the delivery device and / or the power tapped by the delivery device and / or the pressure or negative pressure acting on the piston and / or the state of charge of the integrated power supply. This makes it possible to monitor an ongoing injection or withdrawal, as well as the status or the settings of the syringe system and the charge status of the integrated power supply. The settings or the state of the syringe system can thereby be displayed and monitored before an injection or withdrawal and also during an injection or withdrawal.

In an advantageous embodiment, the syringe system can have a mechanical restraint device which prevents a cannula attached to a syringe inserted into the syringe holder on the syringe body from being released. The cannula can in particular be attached to a nozzle which is arranged at the front end of the syringe and has a Luer connection, for example. The cannula comprises a hollow needle and a cannula connector. The cannula connector is a device provided for connecting the cannula to the syringe or a nozzle of the syringe, which device can in particular have a Luer connector and carries the hollow needle. The retaining device prevents unwanted detachment of the cannula from the syringe, in particular during an injection or removal, and / or the introduction of a syringe with an improperly attached cannula into the syringe holder. The retaining device is arranged at the front end of the syringe holder, that is to say on the end of the syringe holder facing away from the drive housing, or forms the front end of the syringe holder. The retaining device has a passage through which the hollow needle of a cannula protrudes. In order to prevent unwanted detachment of the cannula from the syringe, the retaining device is designed in such a way that it is at least partially guided over the cannula connection of a syringe introduced into the syringe receptacle or at least partially surrounds the cannula connection. The retaining device thereby forms a stop element against which the cannula connection of a syringe introduced into the syringe holder rests. For example, the retaining device can be a passage (or a bore) which tapers in the direction of the front (proximal) end of the syringe system, in which the cannula connector is clamped and / or which allows the cannula to move in the direction of the front end of the syringe system, and thus a detachment from the syringe introduced into the syringe holder is prevented.

In a further embodiment, the drive channel and / or the ventilation channel can comprise a hose connection or be designed as a hose connection. This enables a structurally and manufacturing-technically simple configuration of the drive and ventilation channel or a structurally and manufacturing-technically advantageous connection of the drive channel to the conveying device and of the ventilation channel to the drive channel. The drive and ventilation channels designed as a hose connection can be connected to one another in a simple manner via a connection piece, for example a T-shaped connection piece.

The syringe system can preferably be designed to be suitable for medical purposes, in particular for ophthalmology. The syringe system is particularly preferably made of sterilizable materials such as aluminum, stainless steel, sterilization-stable plastics or combinations of these. The syringe system is advantageously designed in such a way that the surfaces of the syringe holder and the drive housing or its individual elements allow sufficient contact with a sterilizable medium or are accessible for a sterilizable medium, e.g. for steam or radiation sterilization. As a result, the required cleaning or sterilization of the syringe system before and / or after use of the syringe system is possible in a simple and advantageous manner.

The syringe system preferably comprises a syringe introduced into the syringe receptacle, the syringe having a syringe body and a plunger which is movably guided in the syringe body. Furthermore, the syringe can have a nozzle, in particular a conical or (circular) cylindrical nozzle, or a connection device, in particular a Luer connection (Luer lock, Luer slip), and / or a nozzle at the front (proximal) end Have cannula. At the rear (distal) end, the syringe can have a flange which, when a syringe is introduced into the syringe holder, is arranged in a flange holder of the syringe holder provided for the flange.

• 1 einen Längsschnitt einer ersten Ausgestaltung eines erfindungsgemäßen stiftartigen Spritzensystems in aufgeklappter Stellung ohne eine in die Spritzenaufnahme eingebrachte Spritze;
• 2 einen Längsschnitt des Spritzensystems aus 1 mit einer in die Spritzenaufnahme eingebrachten Spritze;
• 3 einen Längsschnitt des Spritzensystems aus 1 in geschlossenem Zustand mit einer in die Spritzenaufnahme eingebrachten Spritze;
• 4 eine teilweise geschnittene Seitenansicht des Spritzensystems aus 1 in geschlossenem Zustand und mit einer in die Spritzenaufnahme eingebrachten Spritze;
• 5 eine Draufsicht auf das Spritzensystem aus 1 in geschlossenem Zustand und mit einer in die Spritzenaufnahme eingebrachten Spritze;
• 6 einen Querschnitt auf Höhe der Fördereinrichtung durch die in 5 gezeigte Draufsicht;
• 7 eine Seitenansicht einer zweiten Ausgestaltung eines erfindungsgemäßen stiftartigen Spritzensystems in geschlossener Stellung ohne eine in die Spritzenaufnahme eingebrachte Spritze;
• 8 eine Seitenansicht des Spritzensystems aus 7 in aufgeklappter Stellung;
• 9 einen Längsschnitt des Spritzensystems aus 7;
• 10 eine Draufsicht auf das Spritzensystem aus 7;
• 11 eine skizzierte Handhabung des Spritzensystems aus 7;
• 12 einen Längsschnitt durch eine dritte Ausgestaltung eines erfindungsgemäßen Spritzensystems in geschlossener Stellung mit einer eingebrachten Spritze.

These and other features as well as advantages and effects of the pen-like syringe system according to the invention emerge from the exemplary embodiments described in more detail below with reference to the accompanying drawings. The drawings show:

• 1 a longitudinal section of a first embodiment of a pen-like syringe system according to the invention in the opened position without a syringe introduced into the syringe holder;
• 2 a longitudinal section of the syringe system 1 with a syringe inserted into the syringe holder;
• 3 a longitudinal section of the syringe system 1 in the closed state with a syringe inserted into the syringe holder;
• 4th a partially sectioned side view of the syringe system 1 in the closed state and with a syringe inserted into the syringe holder;
• 5 a top view of the syringe system 1 in the closed state and with a syringe inserted into the syringe holder;
• 6th a cross-section at the level of the conveyor through the in 5 shown plan view;
• 7th a side view of a second embodiment of a pen-like syringe system according to the invention in the closed position without a syringe introduced into the syringe holder;
• 8th a side view of the syringe system 7th in the unfolded position;
• 9 a longitudinal section of the syringe system 7th ;
• 10 a top view of the syringe system 7th ;
• 11 an outlined handling of the syringe system 7th ;
• 12 a longitudinal section through a third embodiment of a syringe system according to the invention in the closed position with an inserted syringe.

In 1 to 6th is a first embodiment of the pen-like syringe system according to the invention 1 shown in different (sectional) views. The syringe system 1 has a syringe holder 2 on that via a joint 24 with a drive housing 8th is connected or hinged to this foldable. Via one on the underside of the drive housing 8th arranged locking lever 20th can take the syringe 2 in the for using the syringe system 1 closed position with the drive housing provided for injection or removal 8th be firmly connected or locked. The closed position of the syringe system 1 is for example in 3 and 4th shown. Those in the closed position of the syringe system 1 between the syringe holder 2 and the drive housing 8th Existing locking can be activated by pressing the locking lever 20th unlocked, causing the syringe system 1 in the in 1 and 2 shown unfolded position can be brought.

The syringe intake 2 is for holding a syringe 3 designed. In the in 1 shown empty syringe holder 2 can in the open position of the syringe system 1 about the drive housing 8th facing rear side of the syringe holder 2 a syringe 3 into the syringe holder 2 be introduced. The syringe system 1 with one in the syringe holder 2 inserted syringe 3 is for example in 2 shown. The syringe 3 has a cylindrical syringe body 4th and one in the syringe body 4th movably guided piston 5 on. At its front (proximal) end, the syringe points 3 a nozzle 6th on that when in the syringe holder 2 inserted syringe 3 through a passage 28 at the front end of the syringe holder 2 , so that of the drive housing 8th repellent end of the syringe holder 2 , is performed. The nozzle 6th which can in particular be configured in the shape of a cylinder or cone, can have a connection device, in particular a Luer connection (Luer lock, Luer slip) for connecting a cannula. The syringe points at its rear (distal) end 3 a flange 7th on, the one in the syringe holder 2 inserted syringe 3 in one for the flange 7th provided flange mount 26th is arranged. In the closed position of the syringe system 1 becomes the flange 7th the syringe 3 against that in the direction of the syringe holder 2 facing front end of the drive housing 8th pressed, for example in 3 is shown. The drive housing 8th has a sealing element at the front end for this purpose 25th on, in particular a sealing ring against which the flange 7th in the closed position of the syringe system 1 is pressed. This creates a tight connection between the syringe 3 or flange 7th and drive housing 8th given. About the arrangement of the flange 7th in the flange mount 26th is also an exact and safe positioning of the syringe 3 in the syringe holder 2 given.

When an injection is to be made, for example an ophthalmological injection of perfluorocarbons into the eye of a patient, it is in the syringe holder 2 inserted syringe 3 filled with the substance to be injected. The substance to be injected is between the nozzle 6th and piston 5 in the syringe body 4th the syringe 3 arranged. If a withdrawal is to be made, it is in the syringe holder 2 inserted syringe 3 however not filled. The piston 5 is initially at or near the nozzle 6th arranged. The syringe system 1 , especially the syringe holder 2 , is according to the size of one in the Syringe holder 2 to be introduced syringe 3 designed. For example, the syringe system 1 or the syringe holder 2 For holding standard syringes known for injection or withdrawal, in particular 2.25 ml (which are used, for example, for the injection of dyes), 5 ml, or 10 ml (which are used, for example, for the injection of perfluorocarbons or silicone oils ) can grasp, be designed.

The syringe intake 2 of the first embodiment of a syringe system 1 has a window on each side 21st on, such as in 1 and 4th is shown. Through the window 21st is one in the syringe mount 2 arranged syringe 3 at least partially visible.

In particular, this allows the filling level of the syringe 3 or the progress of an injection or withdrawal can be observed. For example, this also means that a substance that has been removed or possibly is in the syringe 3 Existing air bubbles etc. visible, which indicate existing difficulties with the injection or removal.

In the drive housing 8th is an electrical conveyor 9 as well as an integrated power supply 10 to supply the conveyor 9 arranged with electricity or energy. The electrical conveyor 9 is preferably a membrane pump and the power supply connected to it 10 is preferably an accumulator or a battery. In the in 1 to 6th The embodiment shown is the power supply 10 in one at the rear of the drive housing 8th , so the one from the syringe holder 2 repellent end of the drive housing 8th , arranged recording 11 arranged. The recording 11 is through a lid 12 , for example by a thread detachable with the receptacle 11 connected is locked. The configuration described enables the integrated power supply to be exchanged easily 10 . It is also conceivable that the drive housing 8th a connector for charging one as a power supply 10 Has used accumulator. The connection element can in particular be a USB connection or another common electrical connection.

The operation of the conveyor 9 takes place via a button 16 the one in the front area of the syringe holder 2 near the nozzle 6th one in the syringe holder 2 inserted syringe 3 is arranged. The actuation of the button 16 takes place perpendicular to one through which in the closed state of the syringe system 1 through the drive housing 8th and the syringe holder 2 running longitudinal direction L. the syringe system 1 . The button 16 , in particular on that of the locking lever 20th opposite top of the syringe holder 2 is arranged, is for this purpose via an (electrical) connection, not shown, to the conveyor device 9 connected.

The conveyor 9 has a drive channel 13th for (pneumatic) actuation of the piston 5 one with the syringe system closed 1 in the syringe holder 2 inserted syringe 3 with pressure or negative pressure. As the driving medium to act on the piston 5 with pressure, air is used in particular. To supply one as a conveyor 9 used diaphragm pump with sufficient air and to prevent an operation of the conveyor 9 in the drive housing 8th The drive housing has any pressure or negative pressure that may arise 8th a supply opening connected to the environment on the top 18th on.

The in 1 to 3 shown, designed as a hose connection drive channel 13th is with a first entrance 29 one at the front end of the drive housing 8th arranged connector 14th connected. The connector 14th points in the direction of the syringe holder 2 facing side a second entrance 30th on, which is in the closed position of the syringe system 1 towards the piston 5 one in the syringe holder 2 inserted syringe 3 shows. The second entrance 30th something protrudes into the syringe body 4th the syringe 3 , such as in 3 as well as in 6th is shown. 6th shows another through the conveyor 9 and the second entrance 30th running longitudinal section of the syringe system 1 . The connector 14th further points out how in 3 a third input is shown 29 on, which has a first end of a vent channel 15th connected is. The in 1 to 3 shown ventilation duct 15th is designed as a hose connection. The second end of the vent channel 15th is with an opening connected to the environment 17th connected, which in the embodiment shown centrally by the longitudinally T-shaped button 16 protrudes, as in particular in 5 is indicated. At 5 , which shows a plan view of the embodiment, as well as in 4th , which shows the exemplary embodiment in a partially sectioned view, are the ventilation duct designed as a hose connection 15th as well as the drive channel 13th not shown merely for the sake of clarity. The one with the third entrance 31 of the connector 14th connected ventilation duct 15th or the hose connection used is via one on the top of the drive housing 8th arranged recess 19th from the drive housing 8th out and further in one on top of the syringe holder 2 arranged guide channel 32 that up to the opening 17th is formed, guided and with the opening 17th connected.

Operation or use of the syringe system 1 is described below using an injection to be made. Here is a syringe filled with a substance to be injected 3 into the syringe holder 2 introduced and the syringe system 1 is in its closed position for use.

In the case of the injection to be made, the is used as a conveyor 9 diaphragm pump used by pressing the button 16 through one of the buttons 16 actuating finger of the operator, for example the index finger, activated. The opening 17th if the syringe system is used properly 1 or proper actuation of the button 16 through the button 16 actuating finger automatically and forcibly locked. Via the drive channel 13th the air used as the drive medium passes through the connector 14th towards the piston 5 promoted. With the opening closed 17th coming through the ventilation duct 15th with the connector 14th and thus also with the drive channel 13th and the piston 5 is connected, there is an impact on the piston 5 with pressure. The one in the barrel 4th movably guided pistons 5 is thereby in the direction of the nozzle 6th moved, causing the in the syringe 3 contained substance from the nozzle 6th or a cannula attached to it. When the opening is not closed 17th , for example if the button is not pressed properly 16 or when you stop pressing the button 16 , is the drive channel 13th or the piston 5 in connection with the environment. An application of the piston 5 with pressure takes place due to through the opening 17th escaping air. When you finish pressing the button 16 This ensures that the injection is ended immediately, in particular without any lag effects. In addition, it is ensured that if the button is not actuated properly or in an uncontrolled manner 16 no injection is made.

When a substance is withdrawn, for example from a human body, the piston 5 instead of applying negative pressure to pressure, the above statements apply accordingly.

In 7th to 11 Figure 3 is a second embodiment of the pen-type syringe system of the present invention 1 shown in different views. 11 outlines the handling of the syringe system 1 , the syringe system 1 is shown in a partially sectioned view. The reference symbols used to describe the second exemplary embodiment are used in accordance with the reference symbols of the first exemplary embodiment.

This in 7th to 11 Syringe system shown 1 essentially corresponds to that in 1 to 6th shown first embodiment. Into the syringe holder 2 of the in 7th to 11 Syringe system shown 1 is not a syringe 3 brought in. The drive channel, which is designed as a hose connection analogously to the first exemplary embodiment, is also provided 13th as well as the ventilation duct, which is also designed as a hose connection 15th the second embodiment is not shown for the sake of clarity. Next is the connector shown in the first embodiment 14th in the in 7th to 11 shown embodiment not shown. The connector 14th of the second embodiment can be the connector 14th of the first embodiment or a functionally equivalent T-piece for connecting the drive channel 13th , the ventilation duct 15th and the piston 5 (or in the direction of the piston 5 pointing second entrance 30th of the connector 14th ) be.

This in 7th to 11 The illustrated embodiment differs from the first embodiment essentially in the configuration of the syringe holder described below 2 , in particular through the design or arrangement of the button 16 and the opening 17th .

The syringe intake 2 of the second embodiment has in the area of the front end of the syringe holder 2 a recessed area in which the button 16 is arranged. The transition from the non-lowered area to the lowered area is formed by a rounding, with the button 16 is arranged near this transition area. The opening 17th of the ventilation duct 15th is included, as in particular in 10 is shown, arranged in the transition area. The opening 17th essentially points in a direction through the drive housing 8th and syringe holder 2 running longitudinal direction L. the syringe system 1 . The ventilation duct 15th , in particular a ventilation duct designed as a hose connection 15th , the second end of which with the opening 17th is connected, runs at least in sections along one on the upper edge of the syringe holder 2 running guide channel 32 . When the button is pressed correctly 16 lies the button 16 actuating finger, in particular the index finger of an operator, as exemplified in 11 is indicated at the opening 17th , making the opening 17th is automatically closed.

In 11 is handling pen-type syringe system 1 , which is roughly the size of a human hand, indicated. For the sake of clarity, not all reference symbols are shown. In addition to pressing the button 16 as well as closing the opening 17th using the index finger when the button is pressed 16 This also includes holding and guiding the syringe system 1 indicated by the thumb, index finger and middle finger. The syringe system 1 can be held, guided and operated in an ergonomically advantageous and safe manner by an operator, regardless of his hand size. 11 further indicates that the supply opening 18th is not locked when properly handled by the operator. The in 11 Ventilation duct, not shown, designed as a hose connection 15th that is on top of the drive housing 8th through the recess 19th through into the guide channel 32 the syringe holder 2 is performed, and thus in sections via the syringe system 1 protrudes, as comparatively in 4th of the first embodiment is shown affects an operation of the syringe system 1 not.

In 12 Figure 3 is a longitudinal section of a third embodiment of the pen type syringe system 1 shown. This in 12 The embodiment shown largely corresponds in its functional structure to the previous embodiments. The special configuration of this exemplary embodiment, however, differs in part from the preceding exemplary embodiments, as is described below. The ones used to describe the in 12 The reference numerals shown in the third embodiment are used in accordance with the reference numerals of the first or second embodiment.

In contrast to the foldable on the drive housing 8th articulated syringe holder 2 of the first two exemplary embodiments is the syringe holder 2 of the third embodiment via one at the rear end of the syringe holder 2 arranged thread with the drive housing 8th releasably connected. The drive housing 8th points to this on its in the direction of the syringe holder 2 facing front end on a corresponding mating thread. The syringe holder is also conceivable 2 via a bayonet lock to the drive housing 8th connect to. Next is the integrated power supply 10 , in particular an accumulator, immediately following a conveyor 9 , in particular a diaphragm pump, in the drive housing 8th arranged. At the rear of the drive housing 8th is a detachable with the drive housing 8th connected lid 12 appropriate. The lid 12 has a connection element 33 for charging the integrated power supply 10 on. The connection element 33 can in particular be a USB connection.

Next shows the syringe holder 2 in the front area there is a depression or a trough in which to operate the conveyor 9 used buttons 16 is arranged. The conveyor 9 is about one in the front area of the drive housing 8th arranged drive channel 13th with a first entrance 29 a T-shaped connector 14th connected. The second entrance 30th of the connector 14th points in the direction of the piston 5 one in the syringe holder 2 inserted syringe 3 . Via a third entrance 31 is the connector 14th having a first end one substantially along the upper edge of the syringe holder 2 running ventilation duct 15th connected. The second end of the vent channel 15th that about the opening 17th is connected to the environment, is in the area of the sink, in which the button 16 is arranged, arranged, wherein the opening 17th along the longitudinal direction L. the syringe system 1 towards the front end of the syringe holder 2 shows. The drive channel 13th and the vent duct 15th are through in the syringe holder 2 or in the drive housing 8th running bores or short tubular connecting elements formed. In the previous embodiments as a drive channel 13th or ventilation duct 15th used hose connections, in particular also some outside of the drive housing 8th or the syringe holder 2 guided hose connection of the ventilation duct 15th , are not available here.

Next shows the syringe holder 2 of the third embodiment has a mechanical retaining device at its front end 22nd on that a loosening one on the syringe body 4th one in the syringe holder 2 inserted syringe 3 attached cannula or loosening one on a nozzle 6th the syringe 3 attached cannula prevents. One in 12 Cannula (not shown) has a hollow needle and a cannula connector. The cannula connector provides a device for connecting the cannula to the syringe 3 or with the nozzle 6th the syringe 3 that carries the hollow needle. The restraint 22nd has a passage 28 on, through which a hollow needle is attached to the syringe 3 attached cannula is guided. Next is the restraint 22nd designed so that this at least partially via the cannula connection one to one in the syringe holder 2 inserted syringe 3 attached cannula is guided or surrounds the cannula connection. The restraint 22nd forms a stop element for the cannula connection. When the syringe system is in the closed position 1 the cannula connection lies on the retaining device 22nd at. The passage 28 the restraint 22nd can be used as an in 12 not shown, in the direction of the front (proximal) end of the syringe system 1 tapering passage 28 be designed, which fixes the cannula connection by clamping or a movement of the cannula connection and thus the Cannula towards the front end of the syringe system 1 prevented. The restraint 22nd This prevents the cannula from being accidentally detached from the syringe 3 . In particular, loosening of a cannula during an injection or removal is prevented. In addition, the mechanical restraint prevents 22nd inserting a syringe 3 with an improperly attached cannula into the syringe holder 2 .

Through the design of the syringe system according to the invention 1 is a simple and safe way to hold, guide and operate the syringe system 1 , in particular regardless of the size of the hand of an operator and thus a safe and targeted injection or removal of a substance. The risk of possible contamination of the substance to be injected or withdrawn in syringe systems known from the prior art, in particular by a piston rod connected to the piston to drive the piston (lubricated mechanism) or by transferring the substance to be injected or withdrawn is given from an external container into the syringe or vice versa, exists in the syringe system according to the invention 1 Not. The syringe system shown 1 also made possible by being foldable on the drive housing 8th articulated syringe holder 2 or which can be detached from the drive housing via a thread or a bayonet lock 8th connected syringe holder 2 quick and easy insertion and removal of a syringe 3 in or out of the syringe holder 2 . In particular, in the syringe system according to the invention 1 conventional standard syringes (without finger flange and piston rod) can be used. The syringe intake 2 , especially the size of the syringe holder 2 as well as the flange mount 26th , depends on the (standard) syringes to be used 3 designed.

In addition to the 1 to 12 The exemplary embodiments shown are also further versions of the pen-like syringe system, not shown in the drawing here 1 or additionally on the pen-like syringe system 1 provided facilities possible. For example, an embodiment is possible in which the syringe holder 2 is fully or partially heatable. It is also conceivable that a conveyor device used as a membrane pump 9 via the supply opening 18th is connected to a gas reservoir, the gas (mixture) in the gas reservoir being used as the driving medium. Furthermore, an embodiment is also conceivable in which, instead of one with windows 21st provided syringe holder 2 an at least partially transparent syringe holder 2 is used. In addition, configurations are possible in which the syringe system 1 a device for adjusting or limiting the amount by the conveyor 9 provided pressure or negative pressure, in particular the injection rate and / or the withdrawal rate caused thereby. The syringe system 1 can also be a display element for direct or indirect display of the on the piston 5 acting pressure or negative pressure or on the piston 5 acting force and / or to display the charge status of the integrated power supply 10 exhibit. The device for setting the by the conveyor 9 provided pressure or negative pressure as well as the display element can in particular on a clearly visible and for an operation or handling of the syringe system 1 unobstructed position of the drive housing 8th be arranged. The display device can in particular also use the integrated power supply 10 be supplied with electricity or energy.

List of reference symbols

1

Pen-like syringe system

2

Syringe holder

3

syringe

4th

Syringe barrel

5

piston

6th

jet

7th

flange

8th

Drive housing

9

Conveyor

10

Power supply

11

admission

12

cover

13

Drive channel

14th

Connector

15th

Ventilation duct

16

Button

17th

opening

18th

Supply opening

19th

Recess

20th

Locking lever

21st

window

22nd

Restraint device

24

joint

25th

Sealing element

26th

Flange mount

27

Locking lever joint

28

Passage

29

first entrance

30th

second entrance

31

third entrance

32

Guide channel

33

Connection element

L.

Longitudinal direction

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 0810890 B1 [0003]
• US 2018/132990 A1 [0004]

Claims (22)

Pen-like syringe system (1) comprising a syringe holder (2) for receiving a syringe (3) having a syringe body (4) and a plunger (5) movably guided in the syringe body (4), and a drive housing (2) connected to the syringe holder (2). 8) in which an electrical delivery device (9) operated by an integrated power supply (10) for the pneumatic application of pressure or negative pressure to the piston (5) of a syringe (3) inserted in the syringe holder (2) is arranged, the delivery device (9 ) is connected via a drive channel (13) to the piston (5) of a syringe (3) introduced into the syringe holder (2) and can be actuated via a button (16) arranged on the syringe system (1), characterized by a venting channel (15) having a first end which is connected to the drive channel (13), and a second end which is connected to the environment via an opening (17), the opening (17) when actuated de s button (16) can be locked. Syringe system (1) Claim 1 , characterized in that the opening (17) can be closed when the button (16) is actuated by a finger actuating the button (16). Syringe system (1) Claim 2 , characterized in that the opening (17) is automatically closed by the finger when the button (16) is manually actuated with a finger. Syringe system (1) according to one of the preceding claims, characterized in that the conveying device (9) is a diaphragm pump and / or that the plunger (5) of a syringe (3) introduced into the syringe holder (2) is charged with air. Syringe system (1) according to one of the preceding claims, characterized in that the drive housing (8) has at least one supply opening (18) or a supply channel connected to the conveying device (9) for connecting the conveying device (9) to the environment or a gas reservoir. Syringe system (1) according to one of the preceding claims, characterized in that the syringe holder (2) is hinged to the drive housing (8) in a foldable manner. Syringe system (1) according to one of the preceding claims, characterized in that the drive housing (8) or the syringe holder (2) has a locking lever (20) for releasably fastening the syringe holder (2) to the drive housing (8), or vice versa. Syringe system (1) according to one of the Claims 1 to 6th , characterized in that the syringe holder (2) is detachably connected to the drive housing (8), in particular via a bayonet lock or a thread. Syringe system (1) according to one of the preceding claims, characterized in that the syringe holder (2) is at least partially transparent and / or has at least one window (21) arranged laterally through which a syringe (3) arranged in the syringe holder (2) is at least partially visible. Syringe system (1) according to one of the preceding claims, characterized in that the button (16) is arranged on the syringe holder (2), in particular near the front end of the syringe holder (2) facing away from the drive housing (8). Syringe system (1) according to one of the preceding claims, characterized in that the opening (17) of the ventilation channel (15) is arranged in the button (16) or that the syringe holder (2) has a lowered area in which the button (16) and the opening (17) of the venting channel (15) are arranged, the opening (17) of the venting channel (15) being essentially in a longitudinal direction (L) of the syringe system extending through the drive housing (8) and syringe holder (2) (1) and the pushbutton (16) is actuated perpendicular to the longitudinal direction (L). Syringe system (1) according to one of the preceding claims, characterized in that the syringe system (1) can be heated in the area of the syringe holder (2). Syringe system (1) according to one of the preceding claims, characterized in that the syringe system (1) is designed as a self-contained, compact syringe system (1). Syringe system (1) according to one of the preceding claims, characterized in that the integrated power supply (10) is a battery or an accumulator which is arranged in or on the drive housing (8). Syringe system (1) Claim 14 characterized by a connection element for charging the integrated power supply (10), in particular a USB connection. Syringe system (1) according to one of the preceding claims, characterized in that the syringe system (1) has a device for setting or limiting the through the Conveying device (9) provided pressure or negative pressure, in particular the injection rate and / or the removal rate caused thereby. Syringe system (1) according to one of the preceding claims, characterized by a display element for direct or indirect display of the pressure or negative pressure acting on the piston (5) or the force acting on the piston (5) and / or for displaying the state of charge of the integrated Power supply (10). Syringe system (1) Claim 17 , characterized in that the display element is an optical display that shows the power of the conveyor (9) and / or the power tapped by the conveyor (9) and / or the pressure or negative pressure acting on the piston (5) and / or the Shows the charge status of the integrated power supply (10). Syringe system (1) according to one of the preceding claims, characterized by a mechanical retaining device (21) which prevents a cannula attached to the syringe body (4) of a syringe (3) inserted into the syringe holder (2) from loosening. Syringe system (1) according to one of the preceding claims, characterized in that the drive channel (13) and / or the ventilation channel (15) comprises a hose connection or is designed as a hose connection. Syringe system (1) according to one of the preceding claims, characterized in that the syringe system (1) is designed to be suitable for medical purposes, especially for ophthalmology, in particular consists of sterilizable materials such as aluminum, stainless steel, sterilization-stable plastics or combinations of these . Syringe system (1) according to one of the preceding claims, characterized in that the syringe system (1) comprises a syringe (3) introduced into the syringe holder (2), the syringe (2) having a syringe body (4) and one in the syringe body ( 4) has movably guided piston (5).

Images