EP1651114A1

EP1651114A1 - Device used for needle biopsy

Info

Publication number: EP1651114A1
Application number: EP04737412A
Authority: EP
Inventors: Michael Frass; Amir Kurtaran; Klaus Kaserer; Leopold Halling
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-07
Filing date: 2004-08-09
Publication date: 2006-05-03
Also published as: ATA7222004A; WO2005013830A1; US20070270710A1; AT413790B

Abstract

Disclosed is a device used for needle biopsy, comprising a syringe cylinder (1), a plunger (2) that can be displaced therein, and a needle unit (9) which is provided with several puncture needles (9) and whose channels (12) extend into the interior of the cylinder (1). A means (37, 38, 39, 40) for removing air from the interior of the syringe cylinder (1) is provided. The volume between the bottom (5) and the plunger (2) can be temporarily connected to the environment with the aid of said air-removing means.

Description

NEEDLE BIOPSY DEVICE

The invention relates to a device for needle biopsy with a syringe cylinder, a plunger which can be displaced therein and with a needle device.

With devices of the type described needle biopsies with aspiration of tissue and tissue fluid are carried out, a preferred field of application being biopsy of the thyroid gland, but other organs are also possible for this diagnostic method, such as e.g. B. the prostate, the female breast, etc. Often - depending on the needle size - a distinction is made between fine needle and coarse needle biopsy. Related problems of diagnostic reliability are e.g. B. in the article "Large-Needle Aspiration Biopsy for the Preoperative Selection of Palpable Thyroid Nodules Diagnosed by Fine-Needle Aspiration as a MicrofoUicular Nodule or Suspected Cancer", Angelo Carpi et. AI., American Journal of Clinical Pathology 2000, 1.1. 3, pages 872-877.

In known devices, the aspiration is done either by hand by pulling the plunger out of the interior of the syringe barrel or with auxiliary mechanisms, e.g. B. performed a spring-actuated, triggerable movement of the stamp.

Known devices have a needle attached to a conventional syringe barrel, or "syringe" for short, which can usually be attached to the cone of the syringe barrel with an attachment. In order to obtain cells, for example the thyroid gland, the skin is turned on at the beginning of the procedure the puncture site is cleaned and disinfected and then, with or without additional anesthesia, the needle is inserted into the thyroid tissue and by suction, which is done by tightening the plunger in the syringe barrel, cells are brought into the needle channel or possibly into the interior of the syringe barrel Such puncturing can be carried out blindly or under ultrasound control and the cells obtained are then transferred into a vial for further diagnostic purposes, for example microscopic or chemical examinations. A fine needle biopsy of the thyroid is often preferred because it is almost painless and only a small one Complication rate. ^'

A disadvantage of the known fine needle biopsy is that only a single needle is used and therefore material is only supplied from a certain point. However, there may also be a tumor in the immediate vicinity of healthy material, which may be missed. A fine-needle biopsy, which is not meaningful, can subsequently lead to patients with suspected carcinoma (e.g. cold thyroid nodules of the Thyroid), although the likelihood of carcinoma of the thyroid in cold thyroid nodes is between 5 - 15%. A generous surgical strategy, i.e. surgery on all patients who are suspected to have carcinoma, without selection using fine needle biopsy, must be described as unethical because of the unnecessary loss of the organ, high costs, etc.

For these reasons, attempts are made to increase the sensitivity of the fine needle biopsy by puncturing patients with nodules of the thyroid gland several times during a control, namely in different areas of the thyroid gland. However, this strategy is not well accepted by patients and is therefore rarely carried out.

At this point it should be noted that in addition to devices for needle biopsy, in which material is aspirated with the aid of a syringe barrel and a needle, there are also puncture devices that use several needles. For example, WO 01/52742 AI discloses a device with several, in one embodiment three biopsy needles. However, there is no aspiration here, but the needles are moved in channels, cut samples from the tissue and can then be withdrawn.

A similar device with several needles, in one embodiment six, can be found in US Pat. No. 5,415,182 A. Here too, special biopsy needles are used, each made up of cannulas and elongated stylets that can be moved therein, which cut out samples and which are retractable.

The devices with multiple biopsy needles mentioned are complicated in their construction and obviously are not intended to be disposable. Cleaning and sterilization seem extremely complex.

It should also be mentioned that devices with a single needle device are also known, with which several samples can be taken one after the other. Such devices are shown for example in US 6083150 or in EP 1250890 A2. With this device, which is also very complex, samples can be collected in succession in one device, but this does not eliminate the problem that multiple punctures and a corresponding burden on the patient are required. These known devices are mainly used in biopsies in hollow organs, eg. B. stomach, intestine, in use.

Hypodermic syringe-like devices with multiple needles have also become known. For example, DE 1 907296 A shows an adapter for injection syringes, which is used to connect a larger number of injection needles, 7 in the example shown, to an injection device. syringe is used and should be used in particular for subcutaneous injections, for example of local anesthetics. A similar device is described in DE 30 35 009 AI, in which case the adapter can be screwed onto the outlet of a hypodermic syringe, whereas it is plugged on according to the aforementioned document. This device, too, is intended to enable a medicinal product to penetrate locally, for example intermuscularly or subcutaneously. A suction device for snake bites and insect bites according to DE 202 12 639 Ul likewise has a plurality of needles which are seated in a movable piston which is first pushed down when the device is used, the needles penetrating the skin. Then a second piston is pushed up and sucks in liquid in the sense of removing snake venom. Both pistons are automatically moved by spring force after they have been triggered.

Another problem with needle biopsy is that when a needle is pulled out after the actual puncturing process, unwanted tissue fluids and / or blood can also be sucked in. This problem is due to the vacuum that is still present in the syringe barrel after the puncturing. If you pull a needle out of the patient's body after aspiration of a target tissue, the needle tip will e.g. pulled through vessels or other tissue parts and liquid or tissue is sucked in, the assessment of which is not desired or required.

An object of the invention is to provide a simple device with which the above-mentioned disadvantages of fine needle biopsy can be countered. In view of the increasing cost pressure in the medical sector, the devices should have a simple structure and be correspondingly inexpensive.

This object is achieved with a device of the type mentioned at the outset, in which, according to the invention, the needle device has a plurality of puncture needles, the channels of which open into the interior of the cylinder and a venting means is provided for the interior of the syringe cylinder, with the aid of which the volume between the base and the plunger is temporary is connectable to the environment.

Thanks to the invention, a number of tissue samples can be taken simultaneously with a single application, the burden on the patient being significantly lower than if the same number of samples were taken sequentially and the risk of sucking in undesirable substances, which is multiplied with multiple needles reduced.

A very advantageous embodiment of the device according to the invention is characterized in that it has a stop means which determines the penetration depth of the needles in defines the body limits. In one variant, at least one spacer can be provided as the stop means, which has bores assigned to the needles and can be pushed onto the needles in order to limit their depth of penetration into the body. In this way, the desired depth of penetration can be determined, which is done, for example, after a previous ultrasound examination.

Another expedient embodiment provides that a sample container is assigned to each needle and the sample containers are combined to form a unit which can be temporarily connected to the plurality of needles for emptying the collected samples into the containers. In this way, all samples can be transferred into the sample container by a single movement of the stamp. It is expedient if the sample container unit can be plugged onto the syringe cylinder, wherein a groove-and-bar arrangement on the sample container and cylinder enables an unmistakable assignment of the individual needles to the sample containers. When using such a variant of the device, an assignment of the samples taken to individual areas of the examined organ is ensured.

It is furthermore advantageous if a closure means is assigned to the sample containers, wherein this closure means can have a closure for each individual sample container and the closures for the sample containers can be captively connected to them. Such a closure means prevents the samples from becoming dirty or lost immediately after the puncture.

In the sense of protecting the needles on the one hand and the personnel on the other hand, it is advantageous if a common protective cover is provided for all needles, which can be attached over the needles and onto the syringe barrel.

It is usually desirable that the samples taken only fill the cannulas of the needles, or it is undesirable for the samples to get inside the syringe barrel. For this reason, one embodiment provides that a filter medium is arranged in the path between the mouth of the channels into the tips of the needles and the interior of the syringe barrel. The filter means can advantageously comprise individual filter inserts in the tip-side end region of the needles.

An expedient variant is characterized in that the venting means is formed by at least one overflow channel, which is formed at a distance from the syringe base in the inner wall of the cylinder, the length of the channel in the direction of the cylinder axis allowing the volume between the base and the plunger on the at least one overflow channel can be temporarily connected to the cylinder interior located above the plunger. This venting device allows the vacuum to be released and thus the inflow of blood and other undesirable tissue parts when the needles are pulled out.

The venting means can advantageously be formed by at least one venting bore which passes through the wall of the cylinder and is at a distance from the bottom thereof.

Another simple variant provides that a ventilation hole is provided in the cylinder, which in use is closed by means of a closure piece, which, however, can be operated manually in the sense of temporarily releasing the hole.

Another possible and simple embodiment is characterized in that a ventilation hole is provided in the stamp, which is closed in use, but can be opened in the sense of a temporary release of the hole.

For simple but reliable determination of the stamp position after aspiration of a desired volume, it is expedient if at least one indicator projection protruding from the inner wall of the cylinder and which can be overcome by the stamp is provided at a distance from the bottom of the cylinder.

In order to enable easier penetration and / or to obtain samples at different depths, it may be advisable for the puncture needles of the needle device to have at least partially different lengths.

The invention together with further advantages is explained in more detail below on the basis of, for example, embodiments which are illustrated in the drawing. In this show

1 shows a schematic perspective illustration of a device according to the invention with five approaches for needles,

FIG. 2 shows a section through part of the device according to FIG. 1

3 shows the device with attached needles in a representation like FIG. 1, FIG. 4 shows a schematic section of a needle with a filter,

5 again shows a perspective schematic illustration of another embodiment of the device according to the invention with a protective cover that can be attached, 6 shows an embodiment of the device according to the invention with a sample container that can be placed and removed,

7 shows a side view, partly in section, of an embodiment of the invention with a stop means for limiting the depth of penetration of the needles,

8 shows another embodiment in a diagrammatic representation with a slide-on spacer for limiting the penetration depth,

9 shows an embodiment of the invention in a diagrammatic representation with a holding piece for the needles,

10 shows an embodiment of the invention in a schematic side view, in which several needles are connected to a suction syringe via a single common attachment,

11 shows a further variant of the invention in a schematic side view, in which a plurality of needles are connected to a suction syringe via an adapter,

12 shows a variant of the invention with a venting means designed as an overflow channel,

13 shows a variant in which two ventilation options are illustrated with bores in the cylinder wall, and

14 shows an embodiment of a stamp with a central, closable ventilation channel.

As can be seen from FIGS. 1 and 2, a device according to the invention for needle biopsy has a syringe cylinder 1 in which a plunger 2 can be displaced. In the present case, the stamp 2 is connected in a known manner via a shaft 3 to a handle 4, so that the stamp in the sense of an aspiration, ie. H. a suction can be drawn from the cylinder 1 or pressed into the cylinder in the sense of ejection.

In the bottom 5 of the syringe barrel 1 there are several, in the present case five outlets 6, which also each run through a cone 7. The syringe barrel 1, its base 5 and the cones 7 can be injection molded in one piece from plastic. Likewise, the stamp 2, the shaft 3 and the handle 4 can be made of plastic. The stamp 2 can optionally, at least in part, consist of a soft plastic and, in a known manner, have one or more circumferential sealing lips 8. FIG. 3 shows the device according to the invention with five attached puncture needles 9, such a needle being shown in FIG. 4. Each of the needles 9 has an extension 10 which has an inner cone 11 which mates with the cones 7. The approach 10 can be made of plastic and molded onto the steel needle 9. The needle 9 itself is advantageously designed as a so-called “atraumatic” needle, ie with a special cut of the tip.

A filter means can be arranged in the path between the mouth of the needle channel 12 into the needle tip and the interior of the syringe barrel 1 in order to avoid the aspiration of sample material into the interior of the syringe. In the present exemplary embodiment, a filter insert 13 is arranged at the inner end of the needle 1 at the point where it opens into the inner cone 11.

In the embodiment shown in FIG. 5, a common cylindrical protective cover 14 is provided for all needles 9, which can be plugged onto the syringe barrel 1 and then covers all needles 9. At the lower end of the syringe barrel 1 there is a short, outwardly projecting web 15 which engages in a groove 16 or a slot in the casing when the protective casing 14 is attached. This can improve the fit of the protective cover 14. A special meaning of such a web / groove connection is explained in connection with the variant described below.

6 shows a sample container unit 17 belonging to the device according to the invention, which has an annular collar 18 with which it can be placed on the bottom end of the syringe barrel 1. A groove 19 in the collar 18 interacts with the web 15 of the syringe barrel 1 when the sample container unit 17 is attached, so that there is a clear association between each of the needles 9 and individual sample containers 20 of the unit 17. The web 15 can also serve to determine the position of the device during the biopsy process, for. B. be directed upwards or downwards. A preservation liquid can be present in the sample containers 20. The entire sample container unit 17 and / or each individual container 20 can be closed with the aid of a closure, not shown here.

Since it is often desired, e.g. B. on the basis of a previous imaging examination to determine the penetration depth of the needles 9, a stop means is also provided within the scope of the invention, which comes into contact with the skin after a penetration of the needles into the body and a further advance of the Inhibits needles. Fig. 7 shows schematically a stop ring 21 which surrounds the needles 9 from the outside and, for example, can be screwed onto the outside of the syringe barrel 1, as a result of which the penetration depth denoted by d in FIG. 6 can also be set.

Another embodiment of an actuating means is shown in FIG. 8. A spacer 22, which is cylindrical and has holes 23 assigned to the needles 9, can be pushed over the needles 9 in the manner shown until it lies against the outside of the bottom of the syringe barrel 1. With a set of spacers of different thicknesses, the penetration depth of the needles 9 can be adjusted as desired.

Fig. 9 shows a holding piece 24 which is disc-shaped and defines the position of the needles 9 to each other. This holding piece 24 can consist of plastic and can be produced in one piece with the lugs 10, which also consist of plastic. Such a holding piece can also - alternatively or additionally - be arranged in the area of the metallic needle shafts 9, which is indicated by a holding piece 25 shown in broken lines in FIG. 9.

In the embodiments explained so far, each needle can be connected individually to the syringe barrel 1, which is done via individual lugs 10 and cones 7. Alternatively, however, several needles or needle shafts can also be connected to a single attachment, which is shown in FIG. 10. Here, the tip cylinder 1 has a single cone 7. Five puncture needles 9, of which only three can be seen because of the selected side view, are arranged in a fork-like manner and open into a single attachment 10 which can be detachably connected to the cone 7 of the syringe cylinder 1. In the region of their depth of penetration into tissue, the shafts of the needles 9, as in the previous embodiments, expediently run parallel to one another.

FIG. 10 shows yet another sample container unit 26, in which the individual sample containers 27 each have a closure 28 which can be folded away and is captively connected to the container.

The variant of the invention shown in FIG. 11 has an essentially cylindrical adapter 29, which is used to connect a syringe barrel 1 to several, for example five, puncture needles 9. In contrast to the embodiments described above, the syringe cylinder 1 here has only a single cone 30 which can interact with an inner cone 31 which lies in an end face 32 of the adapter 29. On the opposite end face 33 of the adapter 29 several, for example five cones 7 are provided, which can interact with the needles 9, more precisely with their approaches 10.

The bore of the cone 30 is in fluid-conducting connection with the bores of the cones 7 via channels in the interior of the adapter 29, in the present case via a central channel 34 and branch channels 35 leading from this to the five cones 7.

To use the device according to FIG. 11, on the one hand the adapter 29 is plugged onto the syringe barrel 1, the cone 30 cooperating in a sealing manner with the inner cone 31. The end face 32 facing the syringe barrel 1 is designed such that it can rest on the bottom 5 of the syringe barrel 1 when the adapter 29 is attached to the syringe barrel 1. This ensures the required stability when inserting the needles 9. Alternatively, it is also possible to support the adapter 29 by “punctiform” supports on the syringe cylinder 1. In addition, an anti-rotation device can be provided between the syringe cylinder 1 and the adapter 29, for example in the form of a web 36 projecting from the syringe cylinder 1, which, when the adapter 29 is attached, engages in a groove 37 formed in the end face 32 thereof - similar to the web-groove connection 15-19 shown in FIG. 6.

In this embodiment too, a filter means 13 can prevent puncture material from penetrating into the interior of the cylinder. As shown, this filter means 13 can sit in the individual needles 9 in the form of filter inserts 13. Alternatively, a single filter insert can also sit in the central channel 34 of the adapter 29, which is expediently made of plastic.

Of course, the embodiment according to FIG. 11 can also be used with a sample container according to FIG. 9, for which purpose a web, similar to the web 15 in FIG. 6, can be provided on the adapter 29.

A device for needle biopsy according to the invention can expediently be designed as a disposable device, already sterile packed for use. However, other designs are also possible, especially those in which the aspiration is automatic, e.g. B. by spring force after triggering.

When using the device according to the invention, after the above-mentioned cleaning and disinfection of the skin and the use of an appropriate spacer (FIGS. 7, 8), the device with the needles 9 is placed on the skin and stabbed up to the stop. Now the tissue samples are sucked into the needles 9 either by manually pulling out the plunger 2 or by the aforementioned automatic aspiration. After the needles 9 have been pulled out of the body, for example a sample container unit 17 according to FIG. 6 is placed on the syringe cylinder and through Depressing the stamp 2, the samples are transferred to the individual sample containers 20, which are then closed with a suitable closure and are available for further analysis of the samples.

Many other variants, not shown here, are possible within the scope of the invention. The device according to the invention can also be designed to be reusable, for example like a known multi-pipette system which has a single handle and is used for simultaneously sucking in different samples from pipettes. Of course, with a device according to the invention, tissue samples on surgically opened body parts, e.g. B. during a surgical procedure.

By choosing the needle length you can adapt to the respective circumstances. It is also possible to use needles of different lengths within a set of needles, which leads to two effects:

On the one hand, samples can be taken at different depths, and on the other hand the force required for piercing is reduced since not all needles have to penetrate skin or tissue at the same time.

If you do not want to use one or more needles for a puncture procedure, you can provide that suitable closures - instead of the needles - are attached to the corresponding cones of the syringe barrel.

It should also be mentioned that the needles can be permanently connected to the syringe barrel, so that no further preparatory actions are required after a corresponding disposable device has been removed from its sterile packaging.

Such a design with non-releasably provided needles 9 can be seen in FIG. 12. Here the needles sit very closely together, in the present case five needles 9, which can be covered by a protective cover 14, similar to that according to FIG. 5. The embodiment according to FIG. 12, like the embodiments of the following FIGS. 13 and 14, has as a special feature a venting means, the purpose and configuration of which is described below. When a biopsy, for example of the thyroid gland, is carried out with a device according to the invention, the doctor first pierces the skin and further layers of tissue, usually containing many blood vessels, until the needle tips are in the actual aspiration area. Then tissue is drawn into the interior of the syringe by pulling on the plunger and finally the needles are pulled out of the patient's body again. It has been shown that the latter process can cause problems insofar as there is usually still a negative pressure inside the cylinder after tissue aspiration. In the course of pulling out the needles, undesired material, especially blood from blood-rich tissue, is also sucked in, which is an undesirable material for the actual biopsy.

In order to avoid this disadvantage, a venting means is provided for the interior of the syringe barrel 1, with the aid of which the volume between the base 5 and the plunger 2 can be temporarily connected to the environment.

12 with its “detail X”, this venting means is formed by a plurality, for example three, overflow channels 37, which are formed at a distance c from the syringe base 5 in the inner wall li of the cylinder 1. The length 1 of the channels 37 is dimensioned in the direction of the cylinder axis a such that the volume between the base 5 and the stamp 2 is connected to the cylinder interior lying above the stamp when the densest, here plate-shaped section of the stamp moves over the channels 37 or is in the region thereof Shortly before the channels 37, at least one indicator protrusion 41 can protrude inward from the inner wall of the cylinder, which can be overcome when the stamp 2 is pulled out, but can be felt by the doctor that the aspiration target volume has now been reached and when the stamp 2 is pulled out further the desired ventilation takes place via the channels 37. As soon as this has occurred, the doctor can remove the device from the Pa Pull out the client body, d. H. leave the biopsy area with the needle tips and be sure that an undesired material, especially blood, is not subsequently aspirated.

It is understood that the number of overflow channels 37 can be selected as required - there can also be only one such channel or channel.

Instead of an indicator projection 41, it is also possible to provide only a marking on the cylinder wall which indicates the position of the piston 2 or the target volume.

FIG. 13 shows two further possible implementations of the venting means with their “details Y and Z”, the ventilation being here directly through the wall of the cylinder 1 to the outside he follows. According to detail Y, at least one vent hole 38 penetrates the wall of the cylinder 1 at a distance c 'from the bottom 5. Here, too, the aspiration volume is vented automatically as soon as the plunger 2 is pulled over the vent hole 38. ^v

According to "Detail Z", a ventilation hole 39 is closed with the aid of a closure piece 40, for example a small plug. This closure piece can be removed for ventilation. Two types of ventilation holes 38 and 39 are illustrated in FIG. 13, but in only one variety is available in practice.

Finally, FIG. 14 shows an embodiment in which the stamp 2 has an axially continuous ventilation hole 42, which in the region of the stamp handle with the aid of a closure 43, e.g. B. a small stopper is closed. Here too, after the material to be examined has been aspirated, the aspiration volume can be ventilated by opening the closure 43, so that undesired suction of blood, liquor or the like can be avoided when the needles are pulled out of the patient's body.

It should be clear that the aeration (or venting) as described above can also be used advantageously with biopsy devices of the type in question which have only a single puncture needle.

Claims

1. Device for needle biopsy with a syringe cylinder (1), a plunger (2) displaceable therein and with a needle device (9), characterized in that the needle device has a plurality of puncture needles (9), the channels (12) of which inside the cylinder (1) open and a venting means (37, 38, 39, 0) is provided for the interior of the spray cylinder (1), with the aid of which the volume between the base (5) and the stamp (2) can be temporarily connected to the environment.

2. Device for needle biopsy according to claim 1, characterized in that it has a stop means (21, 22) which limits the depth of penetration of the needles (9) into the body in a defined manner.

3. Device for needle biopsy according to claim 2, characterized in that a spacer (22) is provided at least as a stop means, which has the holes (23) assigned to the needles (9) and can be pushed onto the needles in order to penetrate them into the body limit.

4. Device for needle biopsy according to one of claims 1 to 3, characterized in that each needle (9) is assigned a sample container (20) and the sample containers are combined to form a unit (17) which is used to empty the collected samples into the Container with the plurality of needles is temporarily connectable.

5. Device for needle biopsy according to claim 4, characterized in that the sample container unit (17) on the syringe cylinder (1) can be plugged, with a groove-bar arrangement (15-19) on the sample container and cylinder an unmistakable assignment of the individual Needles (9) to the sample containers (20).

6. Device for needle biopsy according to claim 4 or 5, characterized in that the sample container (20) is assigned a closure means.

7. Device for needle biopsy according to claim 6, characterized in that the closure means for each individual sample container (27) has a closure (28).

8. Device for needle biopsy according to claim 7, characterized in that the closures (28) for the sample container (27) are captively connected to the latter.

9. Device for needle biopsy according to one of claims 1 to 8, characterized in that a common protective cover (14) is provided for all needles (9), which can be plugged onto the syringe barrel (1) via the needles.

10. Device for needle biopsy according to one of claims 1 to 9, characterized in that a filter means (13) is arranged in the path between the mouth of the channels (12) into the tips of the needles (9) and the interior of the syringe barrel (1) ,

11. Device for needle biopsy according to claim 10, characterized in that the filter means comprises individual filter inserts (13) in the tip-side end region of the needles (9).

12. Device according to one of claims 1 to 11, characterized in that the venting means is formed by at least one overflow channel (37) which is at a distance (c) from the syringe base (5) in the inner wall (li) of the cylinder (1 ) is formed, the length (1) of the channel in the direction of the cylinder axis (a) making it possible for the volume between the base (5) and the plunger (2) to be temporarily connectable to the cylinder interior located above the plunger via the at least one overflow duct ,

13. Device according to one of claims 1 to 12, characterized in that the venting means is formed by at least one vent hole (38) which passes through the wall of the cylinder (1) and at a distance (c ') from the bottom (5) lies.

14. Device according to one of claims 1 to 13, characterized in that a ventilation hole (39) is provided in the cylinder (1), which is closed in use by means of a closure piece (40), which, however, by hand in the sense of a temporary release of the Hole is actuated.

15. Device according to one of claims 1 to 14, characterized in that a ventilation hole (42) is provided in the stamp (2), which is closed in use, but can be opened in the sense of a temporary release of the hole.

16. Device according to one of claims 1 to 15, characterized in that at a distance (e) from the bottom (5) of the cylinder (1) at least one protruding from the inner wall (li) of the cylinder, from the stamp (2) overcoming indicator projection (41) is provided.

7. Device according to one of claims 1 to 16, characterized in that the puncture needles (9) of the needle device have at least partially different lengths.