DE102007045189A1 - Position detecting device and method for detecting at least two positions - Google Patents

Abstract

The invention relates to a position detection device for detecting at least a first and a second position of a syringe die to the syringe body of a syringe comprising at least three switch means, wherein at least one switch means is designed as a reed contact and at least one switch means as a magnet.

Description

The The invention relates to a position detecting device and method for recording at least two positions. The invention particularly relates a position detecting device for detecting at least one first and second positions of a syringe die and a method for detecting at least two positions of a syringe die to the syringe body of a syringe.

at Thermodilution requires a predefined volume injecting fluid and the change of this injected volume after running through the to be measured To capture vessels. From the difference between the two recorded volumes then become parameters concerning the vessels determined. Important condition for this is that the volumes administered, as well as the time in which the volume is administered was recorded.

In the DE 699 17 425 T2 an injection channel for a blood vessel catheter is described which has a temperature sensor. A flow rate and / or pressure switch is electrically coupled to the output of the temperature sensor.

Here However, it is possible that in an interpretation of a Bolus, whose properties after passing through a blood vessel and / or the heart has been measured, conclusions are drawn that deviate from reality. This results from that it is possible for a bolus to be given by deviates from a designated bolus and the data, according to a Passage of this bolus through a blood vessel and / or the heart has been measured are used as the basis of interpretation can be.

from that results in the task of a position detection device and to provide a method by which the above-mentioned problem can be avoided is.

These Task is in particular by a position detection device for detecting at least a first and a second position a syringe plunger to the syringe body of a syringe, solved, comprising at least three switch devices, wherein at least a switch device as reed contact and at least one switch device is designed as a magnet.

A Position detection device is preferably a device which is suitable at least one position, preferably a position to record a syringe stamp.

A Syringe is preferably a medical instrument for administration of liquid substances is usable. Preferably, there is one Syringe from a preferably cylindrical syringe body, a movable therein syringe die and a preferably cone-shaped nozzle. The syringe is preferably filled by train on the syringe die. Preferably, a fluid is through by pressure on the syringe die the nozzle can be pressed.

A first position of the syringe plunger is preferably a position which the syringe stamp takes when liquid located in the syringe body.

A second position of a syringe plunger is preferably a position which takes the syringe stamp, if between syringe body and syringe dies there is no void that is suitable to absorb a fluid.

switch means are preferably devices that are suitable to positions to capture. Switching devices are preferably devices, which are set to close a circuit when a certain position relative to another switch device is reached. Preferably, the switch device is a microswitch used. A microswitch is preferably an electrical one Switch, whose contacts in the open state less than 3 mm apart. Preferably, a switch device as an opener, particularly preferably as normally open used. Particularly preferred is a reed contact is used.

Reed contacts are preferably under vacuum or inert gas in a glass flask melted contact tongues. The contact tongues are preferably made of precious metal coated ferromagnetic material. A contact operation is preferably carried out by one of external magnetic field.

When Magnet, a device is preferably used which is suitable is to create a magnetic field. Preferably, a magnetic coil or an electromagnet, particularly preferably a permanent magnet used.

Preferably the syringe stamp is arranged in a sheath which prevents that, for example, germs on the syringe die, and thus in to be injected fluid.

Preferably a temperature sensor is arranged in the syringe. Especially Preferably, the temperature sensor is in the region of the nozzle arranged.

Preferably is the syringe stamp with an automatic actuator connected, which is adapted to the syringe stamp on a signal of the processing device to move. Such an automatic Actuator can, for example, motorized or via gas- or fluid-controlled drive mechanisms be used to automatically raise the syringe and syringe To inject bolus. Particularly preferred is the syringe for this purpose taken in a sled, by a suitable motor is driven and can raise the syringe to a first position and then in a predefined time window the syringe empties and to inject a bolus.

Preferably two of the switch devices are fixed in position to the syringe body arranged. This makes it possible, in a simple way to detect two positions of the syringe die. Preferably the fixed position to the syringe body arranged switch devices designed as reed contacts. Preferably, the third switch device designed as a magnet and set up so that at least two positions of the magnet two positions of the syringe die correspond. This makes it possible, from the first position fixed Switch means a first signal for a first position the syringe die and the second fixed position switch means a second signal for a second position of the syringe die to obtain.

Preferably two of the switch devices are movable to the syringe body arranged. This makes it possible to be particularly cost-effective Way to capture two positions of the syringe stamp. Preferably are the two switch devices that are movable to the syringe body are, fixed to the syringe stamp. Particularly preferred the two movable switch devices are set up in such a way that each of the switch devices can occupy at least one position, which corresponds to a position of the syringe die. Especially preferred are the two switch devices, which are arranged movably to the syringe body are formed as magnets. Particularly preferred is another Switch device positionally fixed to the syringe body arranged and formed as a reed contact. Particularly preferred is the syringe die connected to a carriage on which the two switch devices, which are movably arranged for spraying body attached are. This makes it possible in a simple manner, switch devices positionally fixed to the syringe die without the syringe itself needs to be changed.

Preferably the second position of the syringe plunger is the position in which the syringe stamp immediately after emptying the syringe located. This makes it possible to capture the position which occupies the syringe stamp after emptying the syringe. Preferably, the time is detectable, in which the syringe die takes the second position.

Preferably is a first position-fixed switch device in a first Area can be fixed, which corresponds to a first position of the syringe stamp. This makes it possible to different first positions for to provide the syringe stamp. This makes it possible To provide injections that have different volumes. Preferably is the first position-fixed switch device in the first area lockable. This makes it possible to have multiple injections provide, without the first position-fixed switch device new to have to set up.

Preferably is a distance between at least one movable switch device and at least one position-fixed switch device adjustable. This makes it possible to increase the sensitivity of the response specify a switch device. Preferably, the switch means set up to address when they are facing each other. Preferably, the switch devices speak the more precise the smaller the intended distance between a movable one and a fixed position switch means.

Preferably has at least one switch device magnetizable plastic on. This makes it possible to have a switch device particularly easy way to integrate into a syringe. Preferably is at least a portion of the syringe plunger made of magnetizable Plastic formed. This makes it possible in a simple way, a Provide switch means on the syringe die.

Preferably the magnetizable plastic is suitable, with ordinary plastic processing technology to be processed. Particularly preferably, the magnetizable plastic is suitable to accept almost any shape. Preferably, the plastic has a metal part on. It is particularly preferred the metal content in the material magnetize.

Preferably The position detection device includes a lock that is set up is to limit a Füllhubweg the syringe stamp. Thereby it is easily possible to prevent that too much fluid is drawn up with the syringe.

Of the Füllhubweg is preferably the way the syringe stamp when filling the syringe travels.

The Lock is preferably a device that is suitable Retracting the syringe plunger from a defined position of the syringe die relative to the syringe body. Preferably, the lock on a mechanical stop, the positionally connected to the syringe body. Preferably is the position of the barrier relative to the syringe body adjustable so that it is possible to use different filling strokes, and thus different volumes of a fluid in the syringe to specify. Preferably, the syringe die is connectable to the barrier. This makes it possible, the syringe stamp particularly accurate to bring in a certain position. Preferably, the lock set up so that a syringe die verbun with her can be and syringe stamp and lock up to a predefined Position are movable relative to the syringe body. Preferably the position of the lock is detectable. Particularly preferred is the Position of the lock detected by a switch device. Preferably is a control of a wound up fluid amount possible.

Especially Preferably, the lock is provided in a carriage, in which the Syringe can be inserted. By inserting the syringe into a carriage can this record the syringe body firmly and the syringe die lock in a moving carriage. That way is it possible that about the movement of the sled the syringe or the syringe die relative to the syringe body is moved. At this slide system can now preferably a lock be provided so that the carriage system only up to a can move predetermined position. That's the way it is thus only possible, the syringe up to this predetermined Raise position. Through the integration of the reed contacts or the magnets in this external carriage system can this be used with any syringes, making commercially available syringes be used from the sterile packaging in the carriage system can and no modifications to an existing syringe or the syringe stamp are required.

Preferably the lock is connectable to a position-fixed switch device. This makes it possible to detect the response of the lock. Preferably, the barrier is with the first fixed position switch means connectable. Thereby, the provision of a separate switch means for Detecting the response of the lock avoidable. Preferably with the first position-fixed switch device both the response the lock as well as leaving the syringe stamp of the area, in which the lock responds, detectable. Preferably, the compound the lock with the position-fixed switch means a logi cal connection. Particularly preferred is the connection of the barrier with the fixed position Switch means a mechanical connection. Preferably Lock and first position-fixed switch device displaced together. Preferably, by moving the lock or by a Moving the first position-fixed switch device respectively also the first position-fixed switch device or the lock postponed. Preferably, the lock and the first position are fixed Switch device together adjustable. This will achieve a detected position is the position in which the syringe die is pulled out of the syringe body maximum.

Preferably The lock has a slope that is set up to do so is to initiate a force in the syringe stamp that is not in an actuating direction of the syringe die acts when the locator is not connected to the syringe die and pressure is applied to the syringe die. Thereby It is possible to prevent a fluid from being injected will if the syringe stamp is not in a designated first position. In this way it can be prevented that an unintended amount of fluid is injected.

Preferably The force applied to injections is created by the bevel the syringe punch is exercised, particularly preferred a part of this force, diverted in a direction that is not the Actuation direction of the syringe die corresponds.

Preferably the position detection device is connectable to a syringe. This makes it possible to prevent a syringe is actuated without any positions of the syringe plunger be recorded.

Preferably the syringe is detachable with the position detecting device connected so that the syringe is interchangeable.

Preferably the position detection device has a carriage which is connected to at least one switch device, and with the Syringe stamp is connectable. This makes it possible in a simple way to provide a position detecting device such a position of the syringe plunger can be detected without the syringe plunger to change yourself. Preferably, the carriage is fixed in position to the syringe stamp. Preferably, the carriage is in the longitudinal direction the syringe body displaceable.

Preferably, the position detection device comprises a syringe receptacle which is adapted to receive a syringe body. This makes it possible in a simple manner, a syringe with the position detection device connect.

Preferably For example, the syringe receptacle has an area that is a hollow cylinder is trained. Preferably, in the syringe receptacle is a syringe body a commercially available syringe receivable. Preferably a syringe body is connectable to the syringe holder, Particularly preferred is a syringe body with the syringe holder releasably connectable. Preferably, the syringe holder dimensioned such that a syringe body of a commercial Syringe so that it can be positively connected.

Preferred is a method for detecting at least two positions of a syringe plunger for the syringe body of a syringe, comprising the following steps:
Mounting the syringe,
Detecting the first position of the syringe die,
Detecting the time at which the first position is left by the syringe die,
Pressing a content of the syringe through a nozzle of the syringe,
Detecting a second position of the syringe plunger and the time at which the syringe plunger reaches the second position and
Processing the first and second positions and the timings of the detected first and second positions of the syringe die in a processing device. This makes it possible to determine how long an injection time is.

A Nozzle is any device that is capable of fluid out to let escape a syringe.

One Time is any timestamp that compares to other timestamps allowed. Preferably, a time is a timestamp that allows one To determine distance to other times. Especially preferred a time is a time.

The Processing the first and second positions and the times of detected first and second positions of the syringe die in one Processing device preferably includes a determination the extent and temperature of an injected bolus. Especially Preferably, this processing includes a prediction about when the bolus at a certain place of a blood vessel will occur, most preferably a prediction of which Length, preferably which temperature of this bolus becomes. Preferably, the processing includes a calculation such as temperature and / or expansion of the bolus as it passes through change the heart.

Preferably the method further comprises the method steps: connecting the position detecting device with the syringe and set the first fixed position switch means. This makes it possible set up the position detection device such that with the syringe several times a bolus can be raised and injected without that made adjustments to the position detection device Need to become.

The Connecting the position detecting device to the syringe is preferably a detachable connection, so that the syringe can be exchanged. The setting of the first position-fixed switch device is preferably a setting of a first position-fixed switch means to a certain position, preferably one to be injected Volume corresponds.

Preferably the method further comprises the step of: fixing the second fixed position switch means. This makes it possible to detect an end point of an injection. Preferably, the second position-fixed switch device set in a range, which corresponds to a position of the syringe die in which no Volume for a fluid between syringe plunger and syringe body is available.

Preferably the method further comprises the step of: stopping the Drawing up the syringe. This makes it possible to have a defined volume raise. The stopping preferably comprises blocking the Syringe plunger. The mounting of the syringe preferably comprises a movement of the syringe plunger relative to the syringe body such that a volume between the syringe die and the syringe body arises, flows into the fluid through a nozzle. Preferably, the syringe die is by striking against a positionally fixed to the syringe body provided stop reached.

Preferably, the method further comprises the step of: outputting a signal when
a period between reaching a first position of the syringe plunger and reaching a second position of the syringe plunger is too short or too long and / or
if a barrier configured to limit a filling stroke of the syringe die has not been activated. This makes it possible to ensure that an intended volume is injected and / or a fluid is injected over a limited period of time. Preferably, a signal is output when the first position is too short occupied by the syringe die.

A signal is any indication that is appropriate to alert an operator and / or a processing device that there is no proper Injek tion has taken place. Preferably, a signal is arranged to be processed by a processing device such that measured data is discarded. Preferably, a signal is an optical, particularly preferably an acoustic signal.

Preferably the method further comprises the step of: feeding of the area in which the second position-fixed switch device is positioned is in a processing device. This makes it possible the processing device information about the To provide amount of fluid to be injected.

Preferably the area is manually entered into the processing device. Particularly preferably, the position detection device has switches on which are set up, the position of the second position fixed To detect switch device and the processing device to give.

Preferably the method further comprises the step of: calculating a volume that is between leaving the first position and has been injected to reach the second position. Thereby It is possible for the processing device to simple Way to get the information about the injected volume allow.

Preferably the processing device has a List in different positions, different volumes are assigned, particularly preferably, the processing device has a Calculation rule, with which it from the first and the second position can calculate a corresponding volume. Particularly preferred calculates the nature of a bolus. This is preferably done the extent, particularly preferably calculates the temperature of the bolus.

preferred Embodiments of the invention are described below the accompanying drawings explained. Show it:

1 a diagram of an embodiment of a position detecting device according to the invention,

2A - 2E Schemata of an embodiment of a position detection device according to the invention, wherein in each of 2A to 2E another phase is shown in use of the position sensing device,

3A - 3E Schemata of an embodiment of another position detection device, wherein in the 3A to 3E different phases are shown in the use of the position sensing device,

4 a schematic of an embodiment of a syringe holder and a carriage,

5 a diagram of another embodiment of a position detection device.

1 shows a schematic cross section of an embodiment of a position detecting device according to the invention 10 , It is also in 1 the cross section of a syringe 30 with a syringe body 25 and a syringe stamp 20 shown. The syringe body 25 is formed as a cylindrical hollow body in which the syringe die 20 is arranged so displaceable that in the syringe body 25 a cavity can arise which is suitable for receiving fluid. The syringe 20 has a nozzle 35 on that with a hose 80 connected is. The hose 80 has a first hose area 81 on, which is connectable with a bag. Between the first hose area 81 and the nozzle 35 is a first valve 82 arranged. The hose 80 has a second hose area 83 on, which is connectable to a catheter. Between the second hose area 83 and the nozzle 35 is a second valve 84 arranged. The syringe stamp 20 has a piston portion 22 , which is set up with the syringe body 25 to complete a cavity and a handle 21 which is adapted to a force that an operator exerts on him to the piston portion 22 forward.

With the handle 21 is a sled 45 connected so that it is fixed in position to the syringe die 20 is. The carriage extends outside of the syringe body 25 in the same direction as the syringe stamp 20 , He is movable to the syringe body 25 , At the height of the piston section 22 is a switch device 40 on the sledge 45 intended.

Positional to the syringe body 25 are two switch devices 50 and 60 in different areas outside of the syringe body 25 arranged such that the switch means 40 upon actuation of the syringe plunger 20 at the switch devices 50 and 60 can be passed. The switch devices 50 and 60 each have a data line to a processing device 70 on.

By pulling on the handle 21 of the syringe stamp 20 creates a negative pressure in the nozzle 35 , making the first valve 82 opens and fluid from a bag through the first hose area 81 in the syringe body 25 can be sucked. By pressing on the handle 21 of the syringe stamp 20 can fluid through the nozzle 35 in the hose 80 be pressed. This results in the hose 80 an overpressure, causing the second valve 84 opens and the fluid through the second hose section 83 can be routed to the catheter. When moving the syringe plunger 20 will also be on the handle 21 mounted sledges 45 with the switch device 40 moved. The switch device 60 is arranged such that the switch means 40 opposite her lies when the syringe stamp 20 completely in the syringe body 25 is pressed in. The switch device 50 is arranged in a position where it the switch device 40 is opposite when the piston section 22 is positioned in an area corresponding to a volume to be injected. This allows both a proposed starting position and an end position of the syringe die 20 be recorded. In the embodiment shown here, the switch means 40 designed as a magnet. The switch devices 50 and 60 are designed as reed contacts. This is for both positions of the syringe punch 20 a separate position signal.

With the in 1 shown position detection device 10 is it possible in the processing device 70 to check if a volume of fluid has been administered as intended. When the switch device 50 no signal to the processing device 70 has given, the fluid injection is rejected as not proper. When the switch device 60 no signal to the processing device 70 has given, the fluid injection is also rejected as not properly. In the first case it can be assumed that the syringe has not been raised far enough, in the second case it can be assumed that the syringe has not been completely emptied. Moreover, it is possible to discard injections as improper when the time between the receipt of a signal from the switch means 50 and the input of a signal from the switch means 60 has passed, is too short or too long. In both cases, no proper bolus delivery is achieved. In addition, accurate statements about the nature of the bolus can be made, since both the information about its volume and the information about the beginning and end of the injection time are available. Therefore, measurements of the bolus after passage through blood vessels and / or the heart may be more accurately interpreted.

In the 2A to 2E an embodiment of a position detection device according to the invention is shown in different phases. Position sensing device 10 and syringe 30 are similar to in 1 constructed, however, is the switch device 40 at the piston portion 22 arranged directly and formed of magnetizable plastic.

In 2A is the piston section 22 directly at the nozzle 35 , Between the piston section 22 and the syringe body 25 there is no volume suitable for receiving fluid. The switch device 40 lies opposite the switch device 60 , This generates the switch device 60 a signal.

In 2 B is the syringe stamp 20 something from the syringe body 25 pulled out. The switch device 40 is not opposite to the switch device 60 still opposite the switch device 50 , This does not generate any of the switch devices 50 or 60 a signal.

In 2C is the syringe stamp 20 a little further from the syringe body 25 pulled out. The switch device 40 lies opposite the switch device 50 , This generates the switch device 50 a signal. 2C shows the starting position for an injection of a bolus. The syringe 30 is raised.

In 2D is the syringe stamp 20 in the direction of the nozzle 35 been pressed. The switch device 40 is not opposite to the switch device 50 still opposite the switch device 60 , 2D shows the phase of the injection. Neither the switch device 50 nor the switch device 60 generate a signal.

In 2E is the syringe stamp 20 completely in the syringe body 25 pushed. The switch device 40 lies opposite the switch device 60 , The switch device 60 generates a signal.

Because of the switch devices 50 and 60 are designed as reed contacts and the switch device 40 is designed as a magnet, two different signals for the two different positions are generated. This makes it possible to assign the signals exactly to the positions.

In the 3A to 3E the scheme of another embodiment of a position detecting device and another syringe is shown. Unlike the in the 2A to 2E shown position detection device 10 and the syringe shown 30 here is a switch device 40 fixed in position to the syringe body 25 provided on the syringe body. In addition, two trained as magnets switch devices 50 and 60 at the syringe stamp 20 intended.

In 3A lies the piston section 22 of the syringe stamp 20 at the nozzle 35 at. Between the piston section 22 and the syringe body 25 there is no volume suitable for receiving fluid. The switch device 50 lies the switch device 40 across from. The switch in direction 40 generates a signal.

In 3B is the syringe stamp 20 for a first distance from the syringe body 25 pulled out. The switch device 40 is neither the switch device 50 nor the switch device 60 across from. The switch device 40 does not generate a signal.

In 3C is the syringe stamp 20 for another distance from the syringe body 25 pulled out. The switch device 60 lies the switch device 40 across from. The switch device 40 generates a signal. The syringe stamp 20 is in the starting position for an injection.

In 3D is the syringe stamp 20 by a distance in the direction of the nozzle 35 pressed. Fluid is through the nozzle 35 been pushed through. Neither the switch device 50 nor the switch device 60 lie the switch device 40 across from. The switch device 40 does not generate a signal.

In 3E is the syringe stamp 20 completely in the syringe body 25 been pushed in. The switch device 50 lies the switch device 40 across from. The switch device 40 generates a signal.

As a result, the switch device 40 generates a signal at both positions to be detected, it is possible to generate the signal particularly cost.

In 4 is a schematic of an embodiment of a syringe holder 90 and a sled 45 shown. Furthermore, a commercial syringe 30 shown, the syringe body 25 in the syringe holder 90 is included and their grip 21 fixed in position with the carriage 45 connected is.

The sled 45 has a connection area that is detachable with the handle 21 connected is. Connected to this connection area is a switch area that is shaped like a bar parallel to the syringe die 20 extends. At the height of the piston section 22 the switch area has a permanent magnet 40 on.

The syringe pickup 90 has a first region, which is formed as a hollow cylinder, so that the syringe body 25 can be included in it. Furthermore, the syringe holder 90 a second region, which is also in the form of a hollow cylinder. In this second section of the syringe holder 90 is the second area of the sled 45 movably recorded. In this second section of the syringe holder 90 are a first reed contact 50 and a second reed contact 60 positioned.

If the syringe stamp 20 is moved, the carriage moves 45 With. The switch area of the carriage 45 moves in the second area of the syringe holder. If the syringe stamp 20 completely in the syringe body 25 is pressed in, the permanent magnet is the reed contact 60 opposite, so that this then switches. If the syringe stamp 20 is pulled out of the syringe body, is the permanent magnet 40 in a position of the syringe die 20 the reed contact 50 opposite, so that this one switches.

syringe holder 90 and sledges 45 are widely used. They form a related assembly into which a commercial syringe 30 can be integrated. For this, the syringe body 25 in the first section of the syringe holder 90 inserted and the handle 21 of the syringe stamp 20 with the connection area of the carriage 45 connected by a snap connection. Thus, a sterile syringe can be provided in a simple and inexpensive manner, and it can positions of the piston portion 22 be recorded.

5 shows a schematic of another embodiment of a position detecting device 10 , In this embodiment, the carriage is 45 with a reed contact 40 and a carriage-side stop 100 Mistake. A fixed position to the syringe body 25 provided rail 120 is provided with a slot, not shown, and has a first magnet 60 on. On the rail 120 is a positioning device 110 assembled. This positioning device 110 includes a second magnet 50 , a stop 104 with a threaded hole, not shown, and a screw 115 , which is passed through the slot and is screwed into the threaded hole, that the positioning device 110 at the rail 120 is attached.

When the syringe is wound up, the amount that can be drawn up is from the stop 104 limited. In addition, from the reed contact 40 , in that this near the magnet 50 a position signal is generated when the syringe is in the retracted state. Furthermore, it is possible to detect the time at which the emptying of the syringe is started. When the contents of the syringe have been drained, the reed contact is located 40 near the magnet 60 , This also generates a position signal.

By loosening the screw 115 can the positioning device 110 along the rail 120 be moved. By tightening the screw 115 can the positioning device 110 at a be attached anywhere in the region of the slot. This makes it possible to change the maximum amount that can be drawn up with the syringe.

10

Position sensing device

20

syringe plunger

21

Handle

22

piston section

25

syringe body

30

syringe

35

jet

40

switch means

45

carriage

50

switch means

60

switch means

70

processor

80

tube

81

first hose range

82

first Valve

83

second hose range

84

second Valve

90

syringe holder

100

sled-sided attack

104

attack

110

positioning device

115

screw

120

rail

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 69917425 T2 [0003]

Claims (20)

Position detection device ( 10 ) for detecting at least a first and a second position of a syringe die ( 20 ) to the syringe body ( 25 ) a syringe ( 30 ) comprising at least three switch devices ( 40 . 50 . 60 ), wherein at least one switch device ( 40 . 50 . 60 ) as reed contact and at least one switch device ( 40 . 50 . 60 ) is designed as a magnet. Position detection device ( 10 ) according to claim 1, wherein two of the switch devices ( 40 . 50 . 60 ) fixed in position to the syringe body ( 25 ) are arranged. Position detection device ( 10 ) according to claim 1, wherein two of the switch devices ( 40 . 50 . 60 ) movable to the syringe body ( 25 ) are arranged. Position detection device ( 10 ) according to any one of the preceding claims, wherein the second position of the syringe die ( 20 ) is the position in which the syringe stamp ( 20 ) is located immediately after emptying the syringe. Position detection device ( 10 ) according to one of the preceding claims, wherein a first position-fixed switching device ( 50 ) is fixable in a first region, the first position of the syringe die ( 20 ) corresponds. Position detection device ( 10 ) according to one of the preceding claims, wherein a distance between at least one movable switch device ( 40 ) and at least one positionally fixed switch device ( 50 . 60 ) is adjustable. Position detection device ( 10 ) according to one of the preceding claims, wherein at least one movable switch device ( 40 ) or at least one position-fixed switch device ( 60 ) comprises magnetizable plastic. Position detection device ( 10 ) according to one of the preceding claims, comprising a barrier, which is arranged, a Füllhubweg the syringe die ( 20 ) to limit. Position detection device ( 10 ) according to claim 8, wherein the barrier is provided with a position-fixed switch device ( 50 ) is connectable. Position detection device ( 10 ) according to claim 8 or 9, wherein the barrier has a bevel which is adapted to apply a force into the syringe die ( 20 ), which are not in an actuation direction of the syringe die ( 20 ) is effective if the locator does not match the syringe stamp ( 20 ) and on the syringe stamp ( 20 ) a pressure is applied. Position detection device ( 10 ) according to one of the preceding claims, wherein the position detection device is provided with a syringe ( 30 ) is connectable. Position detection device ( 10 ) according to one of the preceding claims, wherein the position detection device ( 10 ) a sledge ( 45 ) which is connected to at least one switch device ( 40 . 50 . 60 ), and with the syringe stamp ( 20 ) is connectable. Position detection device ( 10 ) according to one of the preceding claims, wherein the position detection device ( 10 ) a syringe holder ( 90 ), which is adapted to the syringe body ( 25 ). Method for detecting at least two positions of a syringe punch ( 20 ) to the syringe body ( 25 ) a syringe ( 30 ) comprising the following steps: mounting the syringe ( 30 ), Detecting the first position of the syringe punch ( 20 ), Detecting the time at which the first position of the syringe die ( 20 ), pressing a content of the syringe ( 30 ) through a nozzle of the syringe ( 30 ), Detecting a second position of the syringe punch ( 20 ) and the time at which the syringe stamp ( 20 ) reaches the second position and processes the first and second positions and the timings of the detected first and second positions of the syringe die ( 20 ) in a processing device ( 70 ). The method according to claim 14, further comprising the method steps: connecting the position detection device ( 10 ) with the syringe ( 30 ), Setting the first position-fixed switch device ( 50 ). The method of claim 14 or 15, further comprising the step of: setting the second position-fixed switch device ( 60 ). The method of any one of claims 14 to 16, further comprising the step of: stopping the syringe assembly ( 30 ). A method according to any one of claims 14 to 17, further comprising the step of: outputting a signal when a period between reaching a first Position of the syringe stamp ( 20 ) and reaching a second position of the syringe die ( 20 ) is too short or too long and / or if a barrier that is set up, a Füllhubweg the syringe stamp ( 20 ) has not been activated. Method according to one of claims 14 to 18, further comprising the step of: feeding in the region in which the second position-fixed switching device ( 60 ) is placed in a processing device ( 70 ). Method according to one of claims 14 to 19, further comprising the process step: Calculate a Volume that is between leaving the first position and the Reaching the second position has been injected.