DE10254195A1 - Ampoule holder for injection syringes, comprises a holder body incorporating a chamber, and a protective cover slidable axially from a rest position to a safety position - Google Patents

Abstract

An ampoule holder for injection syringes, comprises a holder body (1) incorporating a chamber (4), and a protective cover slidable axially from a rest position to a safety position in which it fully covers the entire length of the injection needle.

Description

The present invention relates to an ampoule holder for Cylinder ampoule syringes with an internal cavity having base body, into which an ampoule containing a liquid to be injected can be used, one at the proximal end of the base body inlet opening is trained about the one piston rod of the syringe into the cavity is insertable, one with an injection needle at the distal end of the base body couplable outlet opening is formed and the liquid to be injected when moving the piston rod out of the ampoule through the outlet opening and the attached injection needle can be pressed out.

Ampoule holder of this type for example in dental medicine for the injection of analgesics Means used. In a known syringe system, the ampoule holder with its proximal end pivotally mounted on the syringe body. When the ampoule holder is pivoted, the inlet opening is opened, so that the cylinder ampoule through the entry opening into the ampoule holder can be inserted. After swiveling the ampoule holder back completely it is automatically fixed. After advancing the piston rod can this by a provided at the distal end of the piston rod Clamping device with one at the proximal end of the cartridge provided pistons are coupled so that a forward and backward push of the piston the piston rod possible is. After this preparation is done on the distal end of the ampoule holder provided exit opening an injection needle screwed on, which to avoid injuries is secured with a protective cap.

In a modification known under the name "Variosystem" the ampoule holder is designed as a separate part that is completely separate from the remaining syringe, the handle of the syringe, removable is. The ampoule holder has one at its proximal end annular Approach with which he is inserted into a corresponding receptacle on the handle and can be fixed.

The insertion of the cartridge In this system the ampoule holder is removed Ampoule holder. After the ampoule enters through the proximal entry opening inserted the ampoule holder the ampoule holder is coupled to the handle of the injection syringe. The rest Preparation, d. H. coupling the piston rod to the cylinder ampoule and the injection needle is already screwed on in the described way.

Both systems have in common that the entire syringe, i.e. the ampoule holder and the handle, as Reusable instrument part usually made of metal is. So after is done Injection the entire syringe, including the Ampoule holder to undergo sterilization, which is associated with costs is.

Furthermore, are in the known ampoule holders two elongated openings are provided on each side, via which on the one hand, with an aspiration performed before the injection emerging blood thread can be observed and secondly during the Injection the respective position of the piston can be seen. Farther can be done after the Injection the cylinder ampoule gripped through these side openings and through the entry openings be pulled axially out of the ampoule holder.

Because in the dental field injection needles with very small diameters are used in the Injection pressure values very high. In rare cases this high pressure cause that the cylinder ampoule located in the ampoule holder during the Injection bursts, leaving the broken glass of the burst ampoule together with the injection agent still in the ampoule can fall or flow directly into the patient's mouth.

The injection cannulas used exist for one, usually out of for the actual injection used injection needle (hollow needle with tip), the proximal side is a plastic coupling element for attachment to the outlet opening of the ampoule holder. On the other hand, the injection cannula extends on the proximal side through the coupling element and ends in a rear cannula section which into the ampoule holder and the cylindrical ampoule arranged therein protrudes. In the context of this application, the term injection needle for the Outside lying, for the actual injection part used and the term back cannula section for the part protruding into the interior of the ampoule holder.

The main problem with the known Injection syringes, however, are at risk of injury from the Injection needle. Here is the risk of injury from an injection needle especially after having performed Injection to take into account since from this point on the injection needle is contaminated as microbial must be viewed. Dependent of a possible illness of the patient (e.g. HIV or hepatitis) can be an injury with one contaminated in such a way Injection needles pose significant risks.

The risk of injury begins immediately after the injection, d. H. already with the handover the injection syringe from the doctor to the nurse. Also with the next one Transport of the injection syringe from the treatment room to the sterilization room injuries from the injection needle are possible.

In the past, for example, to avoid corresponding injuries, a So-called "recapping" carried out, ie after the injection, the original protective cap was put back on the injection needle. However, especially when the protective cap is placed on the injection needle, there is a risk of a stab injury, so that, for example, "recapping" was prohibited in the USA.

In the past, a variety of Devices presented with those after the injection unscrewed the injection needle from the ampoule holder safely and can be disposed of at the same time. These are often electric However, operated devices are relatively expensive, so that in most cases such devices not in every treatment room, but at best are only present in the sterilization room. The risk of injury on the way from the treatment room to the sterilization room is therefore not excluded by these devices.

It is a task of the present Invention to design an ampoule holder of the type mentioned in the introduction, that injury from a contaminated hypodermic needle is practical can be excluded.

This task is based on the invention solved by an ampoule holder of the type mentioned in that on the outside of the the body a protective cover is provided from a retracted rest position, in the needle is essentially free over its entire length lies, can be moved into an advanced securing position, in which the injection needle is over their entire length inside the protective cover is arranged.

As part of this registration, the The term "proximal" with the meaning "to the body of the doctor lying down "used. Accordingly, the term "distal" is used to mean "distant from the physician's body".

The invention achieves that stab wounds after the injection are practically impossible are, at the same time handling the hypodermic syringe and during the injection in unchanged Way can be maintained. The fact that the protective cover in the withdrawn Rest position the injection needle over its entire length, is the handling of those provided with the ampoule holder according to the invention Hypodermic syringe opposite the previous systems completely unchanged.

Securing the injection needle is with the trained according to the invention Ampoule holder as easy as possible that they should contact the doctor immediately after the injection is stopped be performed can. For the fuse must be checked by the doctor only after the injection has ended the protective cover of the withdrawn Rest position in the advanced securing position in which the injection needle extends over its entire length of the protective cover is covered. The invention thus becomes the earliest possible Time, d. H. immediately after the injection, a backup the injection needle ensures so that puncture injuries are ruled out if handled correctly are. Since the securing of the injection needle is already done by the treating person Doctor performed can, even when handing over the injection syringe from the doctor to the nurse no stab injury occur more. The effect of the invention thus begins at a much earlier time than all known other security systems, such as those at the beginning have been described.

Because the protective cover, in contrast to the movement when "recapping", not on the free Tip of the injection needle, but starting from the Base of the needle is moved towards the needle tip and at the same time the protective cover and the injection needle by fixing them together on the body a clear and fixed position at all times to each other, it is impossible that when pushing the protective cover the tip of the injection needle is touched.

According to an advantageous embodiment of the The injection needle is at least in the area of its tip with a protective cover from completely enclosed on the side. in principle it is sufficient if at least the Tip of the injection needle is covered laterally. Is preferred the injection needle over their entire length with a protective cover from this completely laterally enclosed. This training ensures that the Do not touch the injection needle even below the tip can, so that contamination is completely excluded.

Preferably, the distal end of the protective cover located in the securing position over the Tip of the injection needle. The distal end of the protective sheath is preferably pushing so far forward that touching the The tip of the injection needle is also excluded with the fingertip is. This ensures that even when you touch the distal end of the advanced protective sheath, for example with the fingertip, a stab injury is excluded.

After another advantageous one embodiment the invention is the protective cover in the securing position opposite the basic body immovable fixable. This ensures that for example, if there is a blow to the advanced distal End of the protective cover this is not pushed back into the rest position and the tip of the injection needle will emerge from the protective cover again could.

Preferably takes place when the Securing position an automatic fixation of the protective cover. This automatic fixation guaranteed when complete Advancing the protective cover a forced fixation, so that the fixation as part of an incorrect operation cannot be forgotten.

According to a further preferred embodiment of the invention is at least one for fixing the protective cover to it Detent element provided, which in the secured position with at least one on the body provided the first counter-element cooperates to fix the protective cover. About one Locking element is a very simple and inexpensive fixation of the protective cover against the body possible. In doing so, the Latching element and the first counter element interacting with it be designed so that it can be pushed back after it has been locked the protective cover not possible anymore is. For this purpose, the locking element can be used, for example, as a snap-snap element be trained.

Basically, the locking element as a separate part or in one storey with the protective cover be trained.

After another advantageous one embodiment the invention comprises the locking element a locking lug, while the first counter-element is designed as a latching recess into which the Latch engages in the securing position. Are preferred the locking element in the area of the proximal end of the protective sheath and the first counter element is formed in the region of the distal end of the base body. in principle is it also possible that the catch and the recess are interchanged, d. H. that the locking lug on the base body and the locking recess provided on the protective cover are.

After another advantageous one embodiment of the invention, the locking element comprises a C-shaped base part, on the radial inside one or more, preferably two, radially behind internally extending locking lugs are formed. Two are preferred Detents provided, which are arranged opposite one another.

In particular, the protective cover of the C-shaped Radially encompassed base part, preferably in the outside surface the protective cover an annular Recess, in particular an annular groove is provided in which the C-shaped Base part is arranged. It is also advantageous in the protective cover for each latch an opening provided, through which the respective latching nose in the direction to the outside of the basic body extends.

In principle, it is also possible that the C-shaped Base part directly forms the locking element. In this case the C-shaped Base part the proximal end of the protective sheath in the axial direction embrace that one over the proximal end of the protective sheath protruding part of the C-shaped base part on the outside of the basic body comes to the plant.

The locking elements are advantageously located under tension on the outside of the basic body. This ensures that the locking elements automatically after the protective cover has been pushed all the way into the intervene corresponding first counter elements and thus the desired forced fixation cause.

After another advantageous one embodiment of the invention are on the outside of the basic body one or more longitudinal guides for the cover intended. The longitudinal guides can. there as longitudinal webs be designed so that a through the longitudinal webs reinforcement of the basic body he follows. Can in the locking elements in this case guide grooves be formed when moving the protective cover to the longitudinal webs guided become.

In principle, it is also possible that the longitudinal guides as longitudinal grooves are formed, in which case the locking elements when moving the protective cover in the longitudinal grooves be performed.

The longitudinal guides prevent rotation between protective cover and basic body, so that it is prevented from being under tension on the outside of the basic body adjacent locking elements when rotating the protective cover in the outside of the basic body intervene, if necessary, and move the cover to disturb would.

The protective cover and are preferred the basic body trained against each other non-rotatable. This immovability can thereby by the longitudinal guides already mentioned, but also by other suitable means have been implemented. For example, the outer cross section of the basic body and the inner cross section of the protective cover deviate from the concentric shape, especially an oval, have angular or other suitable shape, through which a security against rotation given is.

After another advantageous one embodiment the invention is the protective cover coupled immovably to the base body in the rest position, this coupling being releasable is trained. This releasable coupling is preferred to be a detachable Latching. Through this releasable Coupling ensures that the protective cover is not accidentally closed at the wrong time, for example before or during the Injection, is transferred from the rest position to the securing position.

According to an advantageous embodiment of the invention, the releasable locking takes place in the rest position via the locking element and a second counter element provided in the proximal area of the base body. Through the double use of the locking element, once for releasable Ver locking in the rest position and on the other hand to the non-releasable locking in the securing position, a cost reduction in the manufacture of the ampoule holder according to the invention is possible.

After another advantageous one embodiment of the invention has the basic body one or more, preferably two side openings through which the internal cavity from the outside accessible is. about these side openings can after the injection and after pushing the protective cover Ampoule from the outside gripped and pushed back out of the body. For this purpose, the lateral openings preferably extend in the direction the longitudinal axis of the Body, to make it easier to remove the ampoule.

According to a further preferred embodiment of the invention, the side openings are in the rest position protective cover Completely locked by this. If during the injection due to the high pressure applied in the Inside of the main body should the ampoule burst, this training will guaranteed that no splinters and no injection fluid through the side openings in the basic body emerge and fall into the patient's mouth or can flow.

After another advantageous one embodiment the invention extends from the inside of the base body from the outlet opening an approach into the cavity. This is preferred in Free end of the extension extending inside the cavity smaller outer dimensions, especially a small outside diameter, as one at the distal end of an ampoule to be inserted into the cavity provided, usually opening closed with a membrane.

Through this approach, the full at Insert the ampoule and advance the piston rod Membrane pushed through the approach to the inside of the ampoule what leads to forced aspiration. Since the injection ampoules used are usually at their distal end with an elastic membrane, for example a rubber membrane, are closed, through which the rear cannula section of the injection cannula passes is stung, the forced aspiration according to the invention by the following Procedure can be achieved. First, in the usual Way of being stunned The area of the gums punctured with the injection needle. Then will the plunger of the injection ampoule by slightly advancing the piston rod moves in a known manner in the distal direction, whereupon the Pressure on the piston rod is stopped again. When advancing the piston rod, the elastic membrane became elastic through the approach deformed so that when the pressure drops the membrane again returns to its rest position. This movement creates within the injection ampoule Negative pressure so that forced aspiration occurs without the Doctor actively pull the piston rod back got to.

After another advantageous one embodiment The basic body and / or the protective cover consist of the invention Plastic. In this way it is a very inexpensive manufacture of the trained according to the invention Ampoule holder possible. In particular, it is advantageous if the one designed according to the invention Ampoule holder is made as a disposable product because of this way sterilization is not required. The ampoule holder according to the invention can in this case after injection with the injection needle inside the protective cover to be disposed of. The protective cover and the base body are preferred producible as injection molded elements.

After another advantageous one embodiment The basic body and / or the protective cover consist of the invention transparent or translucent material. That way guaranteed that while the injection the position of the ampoule piston can be observed and, on the other hand, possibly during aspiration occurring blood thread is reliably detected.

Further advantageous embodiments the invention are specified in the subclaims.

The invention is described below of an embodiment described in more detail with reference to the drawings; in these demonstrate:

1 2 shows a side view of the base body of an ampoule holder designed according to the invention,

2 another side view of the base body after 1 .

3 a section along lines AA 2 .

4 a longitudinal section through the ampoule holder according 2 .

5 2 shows a side view of a protective cover designed according to the invention,

6 a view of the distal face of the protective sheath 5 .

7 a longitudinal section through the protective cover 5 .

8th the longitudinal section according to 4 with inserted cartridge,

9 a partial longitudinal section through an ampoule holder designed according to the invention,

10 a cross section along the line BB from 9 .

11 an ampoule holder designed according to the invention with an injection needle and handle in the decoupled state,

12 an injection syringe with an ampoule holder designed according to the invention, in which the protective sheath is in the rest position,

13 the device after 12 , with the protective cover in the advanced securing position, and

14 a partial longitudinal section through the device 13 ,

1 shows a basic body 1 an ampoule holder designed according to the invention 2 ( 9 ). The basic body 1 has a cylindrical structure with a longitudinal axis 3 and a cavity formed inside 4 ,

The cavity 4 ends at its distal end in an exit opening 5 who, as in 4 can be seen as to the longitudinal axis 3 concentrically arranged outlet channel is formed. Furthermore is in the area of the outlet opening 5 an outside coupling device 6 provided on the usual injection needle 7 (please refer 11 to 14 ) can be coupled in the usual way, for example screwed on.

On two long sides of the body 1 are elongated, oval side openings 8th trained over which the cavity 4 is accessible from the outside.

Furthermore, the cavity 4 is at the proximal end 19 of the basic body 1 via an entry opening 9 accessible from outside. Via this entry opening 9 is a commercially available cartridge 10 ( 8th ) in the cavity 4 of the basic body 1 used. Furthermore, the entrance opening 9 at the proximal end 19 of the basic body 1 from a circular approach 11 surround.

The structure of the base body described so far 1 corresponds essentially to a structure of a known ampoule holder, as is used in injection syringes according to the known vario system.

In contrast to these known ampoule holders, the base body designed according to the invention has 1 in the area of its distal end 18 a circumferential ring groove 12 as well as two along the outer surface of the base body 1 longitudinal webs extending in the longitudinal direction 13 , Another ring groove 14 in the area of the proximal end of the base body 1 provided, this annular groove 14 due to the existing side openings 8th is not completely circumferential. The ring groove 12 also has a much greater depth than the ring groove 14 , Furthermore, the known ampoule holders are designed as reusable products made of metal, while the base body 1 according to the invention preferably consists of plastic as a disposable product.

Especially from the 2 and 3 is again the formation of the longitudinal webs 13 recognizable more clearly. Out 3 it can be seen that the longitudinal webs 13 radially opposite.

Out 4 can be seen that on the inside of the outlet opening 5 an annular approach 15 is formed, which is in the cavity 4 extends into it and runs concentrically around the outlet opening 5. The outside of the approach 15 are conical towards the interior of the cavity 4 trained to converge.

5 shows a protective cover 16 to put on the base 1 after the 1 to 4 is formed and together with this the ampoule holder according to the invention 2 forms.

The protective cover 16 has a hollow cylindrical structure, the inner diameter of the protective cover 16 is slightly larger than the outer diameter of the base body 1 so the protective cover 16 with its proximal end 17 over the distal end 18 of the basic body 1 can be postponed.

On the inside of the protective cover 16 are, according to the longitudinal webs 13 , opposite longitudinal grooves 20 trained, of which in 5 only one is shown in dashed lines. The second longitudinal groove 20 is in 6 to recognize.

In the area of the proximal end 17 the protective cover 16 is an external ring groove 21 provided between two annular approaches 22 . 23 is trained. At the bottom of the ring groove 21 is in the area of the longitudinal grooves 20 an opening 24 in the protective cover 16 trained through the inside of the protective cover 16 is accessible from the outside.

The ring-shaped approach 23 forms together with other annular approaches 25 an attack section 26 the protective cover 16 , The outside of the ring-shaped lugs 25 obliquely towards the distal end 27 the protective cover 16 trained to converge.

7 shows one opposite 5 by 90 ° around the longitudinal axis 3 rotated illustration of the protective cover 16 in longitudinal section. In particular, the two openings 24 to recognize the inside of the protective cover 16 is accessible from the outside.

In 8th is in the cavity 4 of the basic body 1 a commercially available cartridge 28 used. The cylinder ampoule 28 has a cylindrical glass body 29 with injection liquid 30 is filled.

At the proximal end 31 the cylinder ampoule 28 is an opening 32 trained in which a piston 33 made of an elastic material, such as rubber, is used sealingly. The piston 33 has an in at its proximal end 8th opening, not shown, into which the free end of a piston rod 34 can be used. The free end of the piston rod 34 Coupling elements with which a fixed coupling between the piston rod 34 and the piston 33 is possible, so the piston 33 via the piston rod 34 is displaceable in the longitudinal direction.

At the distal end 35 the cylinder ampoule 28 is an end cap 36 provided on which an elastic end plate, for example in the form of a rubber membrane 37 , is attached. Through this rubber membrane one becomes at the distal end 35 the cylinder ampoule 38 trained outlet 38 sealed, the rubber membrane 37 after attaching an injection needle 39 (please refer 11 to 14 ) is pierced as described in more detail below.

Out 8th it can be seen that when the cartridge is inserted 28 in the cavity 4 of the basic body 1 the rubber membrane 37 at the approach 15 comes into contact with the cylinder cartridge when it is fully inserted 28 deformed inward as it is in 8th is shown. The forced aspiration associated with this deformation is also described in more detail below.

In 9 is shown as the protective cover 16 completely over the main body 1 is postponed. During the ring-shaped approach 11 on the one hand a fixation of the ampoule holder designed according to the invention 2 on a commercially available handle of an injection syringe is off 9 realizing that the approach 11 at the same time as a stop for the proximal end 17 the protective cover 16 serves.

It can also be seen that the protective cover 16 and the main body 1 are designed so that the coupling device 6 for the injection needle 39 with the protective cover fully pushed open 16 from their distal end 27 protrudes. This ensures that when the protective cover is fully retracted 16 also the injection needle 39 is exposed over its entire length.

Furthermore, in 9 and in particular more clearly in 10 a locking element 40 to recognize that a C-shaped base part 41 and two radially inner locking lugs 42 includes. The locking element 40 is in the ring groove 21 the protective cover 16 arranged so that the locking lugs 42 through the openings 24 the protective cover 16 into the inside of the protective cover 16 extend into it.

In the latches 42 are guide grooves 43 trained the longitudinal webs 13 reach around and thus twisting the locking element 40 and thus a twisting of the protective cover 16 towards the main body 1 prevent. In this way it is avoided that the locking lugs protruding inward when twisted 42 into the side openings 8th of the basic body 1 penetrate and a complete shift of the protective cover 16 on the base body 1 would block.

The following is based on the 11 to 14 the use of an ampoule holder designed according to the invention 2 described in more detail.

To prepare the injection, first use the ampoule holder made of plastic as a disposable product 2 taken from its sterile packaging. The protective cover 16 is in its fully retracted position on the base body 1 , hereinafter referred to as the resting position of the protective cover 16 referred to as. In this rest position, the latches engage 42 in the on the outside of the body 1 provided ring groove 14 one because the locking element 40 under tension in the ring groove 21 the protective cover 16 is arranged.

The ring groove 14 has only a relatively shallow depth, so that the locking lugs self-decouple 42 and the ring groove 14 prevents targeted decoupling by advancing the protective cover 16 however is possible. By touching the protective cover 16 on the attack section 26 and targeted advancement can be found between the distal shoulder of the ring groove 14 and the latches 42 overcome the blocking, so that the protective cover moves 16 distal direction is possible, as described in more detail below. This possibility of displacement can be achieved by an appropriate design of the annular groove 14 as well as the locking lugs 42 , can be further improved, for example, by appropriate run-up slopes.

After removing the ampoule holder 2 its sterile packaging becomes a cartridge 28 through the entrance opening 9 in the cavity 4 of the basic body 1 pushed in until the rubber membrane 37 at the approach 15 comes to the plant.

Then the ampoule holder 2 with its proximal approach 11 in a recording 44 a handle 45 a commercial injection syringe 46 used. The handle 45 includes a longitudinally displaceable piston rod 34 with a handle at the proximal end 47 and at the distal end of a commercial clamping section, not shown, are provided. The clamping section can comprise, for example, expanding claws, which can be turned by turning the handle 47 provided operating section 48 can be retracted or extended radially.

After fixing the ampoule holder 2 on the handle 45 becomes the piston rod 34 pushed forward in the distal direction until the expanding claws enter a proximal opening of the piston 33 the cylinder ampoule 28 enter. By turning the operating section 48 the expanding claws are moved radially outwards, so that a secure connection between the piston rod 34 and the piston 33 arises.

Then the injection cannula, which is also sterile packed and designed as a single-use product, is used 49 removed from their sterile packaging and onto the coupling device 6 of the ampoule holder 2 sets up, for example screwed to this. The injection cannula 49 includes a distal injection needle 39 with which the actual injection takes place. At the proximal end of the injection needle 39 is a coupling element usually made of plastic 50 , usually in the form of a cone, over which the injecti onsnadel 39 with the coupling device 6 can be coupled. At the proximal end of the coupling element 50 is an extension of the injection needle 39 in the form of a rear cannula section 51 trained according to an arrow 52 through the outlet opening 5 through into the cavity 4 of the basic body 1 can be used.

How out 14 can be seen, the rear cannula section pierces 51 the rubber membrane 37 so that the injection liquid 30 through the back cannula section 51 to the injection needle 39 can be performed.

After the injection needle 39 completely on the main body 1 is put on, the injection syringe is ready for use, as it is in 12 is shown. The protective cover 16 is still in its rest position.

After puncturing, the piston rod 34 over the handle 47 slightly shifted distally until the end cap 36 the cylinder ampoule 28 on the distal end of the cavity 4 comes to the plant. In this position the rubber membrane 37 through the approach 15 pressed in as it is in 8th is shown.

Then the piston rod is pushed forward 34 stopped and the handle 47 released so that due to the elasticity of the rubber membrane 37 the cylinder ampoule 28 and with it the handle 47 again can be moved slightly in the proximal direction. This shift creates inside the cartridge 28 a negative pressure, so that automatic aspiration, ie forced aspiration, takes place without the handle 47 must be actively withdrawn.

During this forced aspiration, a blood thread enters the cylinder ampoule 28 one over the side openings 8th can be observed, the puncture procedure must be repeated.

The injection is carried out in a known manner, with the protective cover 16 throughout the injection in the 11 shown rest position is in which it through the in the ring groove 14 engaging locking element 40 is secured against inadvertent advancement.

After the injection, the injection needle 39 pulled out of the tissue in the usual way, but the injection syringe is not, as in known systems with an unsecured injection needle 39 handed over to the medical assistant. According to the invention, the protective sheath 16 is removed by the doctor according to an arrow immediately after the injection 53 in 13 moved forward in the distal direction until the injection needle 39 completely inside the protective cover and the tip of the injection needle 39 from the distal end of the sheath 16 is towered over.

During the advancement, the protective cover becomes non-rotatable on the base body 1 out until the latches 42 of the locking element 40 due to the bias of the locking element acting in the radial direction 40 into the at the distal end of the body 1 trained ring groove 12 enter. Because of the depth of the ring groove 12 there is a non-releasable locking between the protective cover 16 and the body 1 , so that the protective cover is accidentally withdrawn 16 is reliably prevented. This one in 13 shown state of the protective cover 16 is called the security position.

In the now secured position, the injection syringe can be handed over to the medical assistant without any risk, who also, without any risk of injury, the ampoule holder 2 together with the secured injection needle 39 out of the handle 47 can be removed and deposited for disposal.

In 14 is shown in a partial section, like the two locking lugs 42 completely into the ring groove 12 intervene, causing the protective cover to be accidentally pushed back 16 is reliably prevented.

The risk of a stab injury after the injection is practically excluded with the invention. The effect of the invention continues immediately after termination the injection, so in particular the dangerous time of delivery the injection syringe from doctor to nurse through the invention is kept risk-free.

1

body

2

ampoule holder

3

longitudinal axis

4

cavity

5

outlet opening

6

coupling device

7

injection needle

8th

side openings

9

inlet openings

10

cartridge

11

circular approach

12

ring groove

13

longitudinal webs

14

ring groove

15

approach

16

cover

17

proximal End of the protective cover

18

distal End of the body

19

proximal End of the body

20

longitudinal grooves

21

ring groove

22

circular approach

23

circular approach

24

opening

25

annular approaches

26

engaging portion

27

distal End of the protective cover

28

cartridge

29

vitreous

30

injection fluid

31

proximal End of the cartridge

32

opening

33

piston

34

piston rod

35

distal End of the cartridge

36

end cap

37

rubber membrane

38

outlet opening

39

injection needle

40

locking element

41

C-shaped base part

42

locking lugs

43

guide

44

admission

45

grip

46

syringe

47

handle

48

actuating section

49

injection needle

50

coupling element

51

rear cannula section

52

arrow

52

arrow

Claims (37)

Ampoule holder for cylindrical ampoule syringes with an internal cavity ( 4 ) basic body ( 1 ) into which a liquid to be injected ( 30 ) containing ampoule ( 28 ) can be used, whereby at the proximal end ( 19 ) of the basic body ( 1 ) an entrance opening ( 9 ) is formed, via which a piston rod ( 34 ) the syringe into the cavity ( 4 ) can be inserted at the distal end ( 18 ) of the basic body ( 1 ) one with an injection needle ( 39 ) connectable outlet opening ( 5 ) and the liquid to be injected ( 30 ) when the piston rod is moved ( 34 ) from the ampoule ( 28 ) through the outlet opening ( 5 ) and the attached injection needle ( 39 ) can be pressed out, characterized in that on the outside of the base body ( 1 ) a protective cover ( 16 ) is provided from a retracted rest position in which the injection needle ( 39 ) is essentially free over its entire length, can be moved into an advanced securing position in which the injection needle ( 39 ) is arranged over the entire length within the protective cover. Ampoule holder according to claim 1, characterized in that the injection needle ( 39 ) at least in the area of its tip with the protective cover in the securing position ( 16 ) is completely enclosed by the side. Ampoule holder according to one of the preceding claims, characterized in that the injection needle ( 39 ) over their entire length with the protective cover in the securing position ( 16 ) is completely enclosed by the side. Ampoule holder according to one of the preceding claims, characterized in that the distal end ( 27 ) of the protective cover in the securing position ( 16 ) over the tip of the injection needle ( 39 ) protrudes. Ampoule holder according to one of the preceding claims, characterized in that the protective cover ( 16 ) in the securing position in relation to the base body ( 1 ) can be fixed immovably. Ampoule holder according to claim 5, characterized in that when the securing position is reached, the protective cover ( 16 ) he follows. Ampoule holder according to one of claims 5 or 6, characterized in that for fixing the protective sheath ( 16 ) at least one locking element ( 40 ) is provided, which in the securing position with at least one on the base body ( 1 ) provided first counter element ( 12 ) to fix the protective cover ( 16 ) interacts. Ampoule holder according to claim 7, characterized in that the latching element ( 40 ) is designed as a separate part. Ampoule holder according to claim 7, characterized in that the locking element in one piece with the protective cover is trained. Ampoule holder according to one of claims 7, 8 or 9, characterized in that the latching element ( 40 ) at least one latch ( 42 ) and that the first counter element as a locking recess ( 12 ) into which the locking lug ( 42 ) engages in the securing position. Ampoule holder according to one of claims 7 to 10, characterized in that the latching element ( 40 ) in the area of the proximal end ( 17 ) the protective cover ( 16 ) is trained. Ampoule holder according to one of claims 7 to 11, characterized in that the first counter element ( 12 ) in the area of the distal end ( 18 ) of the basic body ( 1 ) is trained. Ampoule holder according to one of claims 7 to 12, characterized in that the latching element ( 40 ) a C-shaped base part ( 41 ), on the radial inside of which one or more, preferably two, radially inwardly extending locking lugs ( 42 ) are trained. Ampoule holder according to claim 13, characterized in that two locking lugs are provided are, which are arranged opposite each other. Ampoule holder according to claim 13 or 14, characterized in that the protective cover ( 16 ) from the C-shaped base part ( 41 ) is encompassed radially. Ampoule holder according to one of claims 13, 14 or 15, characterized in that in the outer surface of the protective sheath ( 16 ) an annular recess ( 21 ), in particular an annular groove is provided in which the C-shaped base part ( 41 ) is arranged. Ampoule holder according to one of claims 13 to 16, characterized in that in the protective cover ( 16 ) for each latch ( 42 ) an opening ( 24 ) is provided, through which the respective locking lug ( 42 ) towards the outside of the base body ( 1 ) extends. Ampoule holder according to one of claims 7 to 17, characterized in that the latching elements ( 40 ) under tension on the outside of the base body ( 1 ) issue. Ampoule holder according to one of the preceding claims, characterized in that on the outside of the base body ( 1 ) one or more longitudinal guides ( 13 ) for the protective cover ( 16 ) are provided. Ampoule holder according to claim 19, characterized in that the longitudinal guides as longitudinal webs ( 13 ) are trained. Ampoule holder according to claim 20, characterized in that in the locking elements ( 40 ) Guide grooves ( 43 ) are formed, which when moving the protective cover ( 16 ) on the longitudinal bars ( 13 ) are performed. Ampoule holder according to claim 19, characterized in that that the longitudinal guides as longitudinal grooves are trained. Ampoule holder according to claim 22, characterized that the locking elements when moving the protective cover in the longitudinal grooves be performed. Ampoule holder according to one of the preceding claims, characterized in that the protective cover and the base body ( 1 ) are designed to be non-rotatable relative to one another. Ampoule holder according to one of the preceding claims, characterized in that the protective cover ( 16 ) in the rest position with the base body ( 1 ) is immovably coupled, this coupling being designed to be detachable. Ampoule holder according to one of the preceding claims, characterized in that the protective cover ( 16 ) in the rest position with the base body ( 1 ) is releasably locked. Ampoule holder according to one of the preceding claims, characterized in that the releasable locking in the rest position via the locking element ( 40 ) and one in the proximal area ( 19 ) of the basic body ( 1 ) provided second counter element ( 14 ), in particular an annular groove. Ampoule holder according to one of the preceding claims, characterized in that the protective cover ( 16 ) is essentially cylindrical. Ampoule holder according to one of the preceding claims, characterized in that the base body ( 1 ) is at least partially cylindrical. Ampoule holder according to one of the preceding claims, characterized in that the base body ( 1 ) one or more, preferably two side openings ( 8th ) through which the internal cavity ( 4 ) is accessible from the outside. Ampoule holder according to claim 30, characterized in that the one or more openings ( 8th ) in the direction of the longitudinal axis ( 3 ) of the basic body ( 1 ) extend. Ampoule holder according to one of the preceding claims, characterized in that in the interior of the base body ( 1 ) starting from the outlet opening ( 15 ) in the cavity ( 4 ) extends into it. Ampoule holder according to claim 32, characterized in that the to the interior of the cavity ( 4 ) extending free end of the approach ( 15 ) has a smaller outer dimension, in particular a smaller outer diameter than one at the distal end of one in the cavity ( 4 ) ampoule to be used ( 28 ) provided, usually with a membrane ( 37 ) closed opening. Ampoule holder according to claim 33, characterized in that the approach ( 15 ) is arranged so that when completely in the cavity ( 4 ) inserted ampoule ( 28 ) and advancing the piston rod ( 34 ) the membrane ( 37 ) through the approach ( 15 ) inside the ampoule ( 28 ) is pressed down. Ampoule holder according to one of the claims 32 to 34, characterized in that the approach ( 15 ) is annular and the outlet opening ( 5 ) encloses in a ring, in particular concentrically. Ampoule holder according to one of the preceding claims, characterized in that the base body ( 1 ) and / or the protective cover ( 16 ) are made of plastic. Ampoule holder according to one of the preceding claims, characterized in that the base body ( 1 ) and / or the protective cover ( 16 ) consist of transparent or translucent material.