nasal splint

Abstract

Nasal splint (5) for insertion into the nose of a patient, in particular by means of an application device (1), wherein the nasal splint (5) comprises a base body (14) made of elastic material, wherein complementary projections (18, 18') and recesses (19, 19') are arranged on opposite edges of the nasal splint (5), which engage with one another when the nasal splint (5) is rolled up, wherein the nasal splint (5) has a plurality of magnets (15, 16) which are designed and arranged such that the contact pressure of the nasal splint on the nasal septum of a patient is between 1.9 kPa and 5.6 kPa when a nasal splint (5) of the same type is arranged on the opposite side of the nasal septum.

Description

[0001] The invention relates to a nasal splint.

[0002] Nasal splints are used for postoperative stabilization and splinting of the nasal septum. After surgery, the nasal septum is splinted using two plastic plates (nasal splints) to ensure the nasal septum heals straight, provide a splint for the epithelialization of mucosal wounds, and prevent bruising. The nasal splints are secured to the nasal septum with sutures or packing. The disadvantage is that overly tight sutures can lead to pressure necrosis, while overly loose sutures do not secure the nasal splints sufficiently.

[0003] It is known to equip nasal splints with magnets, so that two opposing nasal splints attached to the nasal septum magnetically attract each other and are fixed to the nasal septum. Such nasal splints are known, for example, from US Pat. No. 4,402,314. Here, too, the problem exists that excessive magnetic force can lead to pressure necrosis, while excessively weak magnetic force may not be sufficient to adequately fix the nasal splints.

[0004] Traditionally, these nasal splints are inserted into a patient's nostrils using tweezer-like applicators. To ensure smooth insertion, the nasal splints are sized to match the patient's nostrils. However, this can result in the surface area of ​​the nasal splint being too small relative to the area of ​​the nasal septum.

[0005] The object is to provide an improved nasal splint that can be inserted into the nose of a patient using an application device.

[0006] This object is achieved by the invention defined in claim 1. Advantageous embodiments can be found in the subclaims.

[0007] According to the invention, a nasal splint is created for insertion into the nose of a patient, in particular by means of an application device, wherein the nasal splint comprises a base body made of elastic material, wherein complementary projections and recesses are arranged on opposite edges of the nasal splint, which engage with each other when the nasal splint is rolled up, wherein the nasal splint has a plurality of magnets which are designed and arranged such that the contact pressure of the nasal splint on the nasal septum of a patient is between 1.9 kPa and 5.6 kPa when a nasal splint of the same type is arranged on the opposite side of the nasal septum. These values ​​have proven to be suitable standard values ​​for different patients with nasal septums of different sizes. The decisive factor is the sum of the exerted forces in relation to the area on which they act.Furthermore, it has been shown that these values ​​solve the problem mentioned above and ensure that the nasal splints are securely fixed to the nasal septum without causing local circulatory problems or pressure necrosis.

[0008] In one embodiment, the thickness of the base body is thinner at the edges than in the center. This prevents shear forces from developing on the patient's mucosa, which may have thickened postoperatively, and which could lead to injury.

[0009] In one embodiment, the nasal splint can be arranged rolled up or folded in the hollow body of an application device. Such a nasal splint can be any size relative to the nasal septum. In other words, the size of the nasal splint can be based on the size of the nasal septum and is not limited, for example, by the size of a patient's nostrils.

[0010] Advantageously, the nasal splint has an area between 1,620 and 1,750 mm 2 and in particular between 1,670 and 1,700 mm 2 This size is suitable as a standard size for various patients with different sized nasal septums. The length of the nasal splint can be 64-70 mm, with a maximum of approximately 67 mm. The height can be between 15 and 34 mm, with the nasal splint being less high in the front than in the back. In particular, the height can be approximately 18 mm in the front and approximately 31 mm in the back.

[0011] In one embodiment, the magnets are formed by NdFeB magnets. It has been found that NdFeB magnets, as an example of rare earth magnets, have the advantage of high holding force in relation to their size.

[0012] In one embodiment of the invention, the base body of the nasal splint is made of silicone, in particular a silicone film with a silicone hardness of 30-70 Shore, preferably approximately 50 Shore. The base body can be adapted to the shape of the nasal septum on which the nasal splint is to be placed. In this embodiment, the nasal splint is sufficiently flexible to be rolled up and inserted into a patient's nose using an application device. At the same time, however, the nasal splint is sufficiently hard to distribute the contact pressure generated by the magnets evenly across the surface of the nasal splint onto the mucous membrane and the nasal septum.

[0013] In one embodiment, the nasal splint is manufactured by injection molding. Unlike cutting, injection molding has the advantage that no unwanted edges or burrs are created at the edges of the nasal splint. Furthermore, the nasal splint can be manufactured thinner in the edge area.

[0014] In particular, the nasal splint can be made from a film made of different materials. Suitable materials include silicone and polyethylene, both of which have a very smooth surface. The magnets can be attached to the film with acrylic adhesives.

[0015] There are various ways to securely adhere the magnets to the film. In one embodiment, the magnets are glued into recesses in the carrier film. In another embodiment, the magnets are coated with a thin second film. In yet another embodiment, the magnets are baked into the film during film production.

[0016] The contour of the nasal splint is adapted to the contour of the patient's nasal septum. In particular, the contour of the nasal splint is adapted in sections to the corresponding regions of the nasal septum, allowing for a clear assignment of the nasal splint sections to the corresponding areas of the nasal septum.

[0017] According to the invention, there is also provided a device set comprising a nasal splint as described above and an application device comprising at least one hollow body for receiving the nasal splint and a piston movable in the hollow body, wherein an end face of the hollow body is open so that a nasal splint contained in the hollow body can be inserted into the nose of a patient by moving the piston out of the hollow body through the open end face.

[0018] Using the application device, nasal splints can be easily inserted into a patient's nose. First, a folded or rolled nasal splint is placed in the hollow body of the application device. The front opening of the application device is then inserted into the patient's nose. The plunger in the hollow body is then moved toward the patient, forcing the nasal splint out of the hollow body. The plunger then unfolds and adheres to the patient's nasal septum.

[0019] Using the application device, nasal splints with a larger surface area can be inserted into a patient's nose compared to conventional nasal splints. The nasal splints can be held in a rolled or folded state in the application device and inserted into the nose. Since the nasal splints are not yet unfolded or unrolled during the insertion process, their size is not limited by the size of the nostril. In any case, the insertion process is more comfortable for the patient and the risk of injury to the nasal opening is reduced.

[0020] This not only advantageously allows for the insertion of larger nasal splints into a patient's nose, but also allows for the use of nasal splints of a sufficiently standard size, whereby the standard size can be based on the size of the nasal septum of an average patient, regardless of the size of the nostrils.

[0021] A further advantage is that the application device is easy to manufacture. In principle, it is possible to manufacture the application device by providing a conventional plastic syringe whose cylindrical hollow body is cut or sawed off so that the end face on the side of the syringe facing the patient is open. A folded or rolled-up nasal splint can be inserted into the hollow body through this opening and then introduced into a patient's nose. In other words, the hollow body of the application device, in one embodiment, corresponds to the main body of a syringe, but without the tapered projection with needle.

[0022] In an advantageous embodiment, the at least one hollow body has a non-circular cross-section, in particular a cross-section with a substantially straight first side and an opposite, round second side. The cross-section of the hollow body is preferably adapted to the cross-section of the nostril of an average patient, thereby simplifying the insertion of the application device into the patient's nose.

[0023] According to one embodiment, the end face of the at least one hollow body facing the patient is inclined relative to the longitudinal axis of the hollow body. As a result, the hollow body is longer on one side than on the opposite side. To insert a nasal splint, the longer side of the hollow body is inserted past the nasal bridge into the patient's nose. Due to the inclination, the hollow body does not have to be inserted into the nose with its entire circumference.

[0024] In a preferred embodiment, the application device comprises two hollow bodies, which are arranged in particular parallel to one another. The two hollow bodies can be identical. Using such an application device, two nasal splints can be inserted into both nostrils of a patient in one operation. This prevents the magnetic force of one foil positioned in the patient from exerting an undesirable influence on the foil yet to be inserted.

[0025] In one embodiment, the two hollow bodies are connected to each other, with a space provided between the two hollow bodies in which the patient's columella can rest during the insertion process. An application device designed in this way can thus be inserted sufficiently far into the patient's nostrils without the patient's columella getting in the way or being subjected to excessive strain.

[0026] In one embodiment, the application device comprises an actuating element, in particular a thumb rest, which is connected to both pistons and with which the pistons of both hollow bodies can be moved simultaneously within the hollow bodies with one actuation. In this embodiment, both pistons can thus be moved by simply pressing the actuating element.

[0027] According to the invention, a nasal splint device is further provided, comprising a nasal splint as described above and a holding device for releasably holding the nasal splint in a rolled-up or folded state. Thus, the nasal splint according to the invention can have a larger footprint compared to prior art nasal splints, which must be inserted into the nose in a conventional manner.

[0028] The retaining device can be formed by one or more detachable threads, a detachable or removable retaining film made of a water-soluble material, or a retaining film with a perforation. Such a retaining device facilitates gentle insertion of the nasal splint into the patient's nose.

[0029] In an alternative embodiment, the holding device is formed by an elastic tube in which the nasal splint is arranged. The nasal splint can be inserted from the elastic tube into the patient's nose, for example, by means of a piston or compressed air. Such a holding device is inexpensive to manufacture and easy to use.

[0030] In one embodiment, the complementary projections and recesses arranged on opposite edges of the nasal splint, which interlock when the nasal splint is rolled up, can be secured together by the retaining device. The retaining device can be formed by a thread or wire arranged within a hole in the projections. This embodiment allows for easy release of the retaining device for unrolling the nasal splint.

[0031] According to the invention, a method for producing the nasal splint described above is also provided, wherein the base body has at least one recess for receiving at least one magnet, the method comprising arranging a non-ferromagnetic body with at least one auxiliary magnet on the base body such that the auxiliary magnet exerts a magnetic force of attraction on a magnet to be received or received in the recess; and applying, in particular gluing, a cover film to the base body over the magnet in the recess. This method can be used to prevent the holding magnets from becoming detached from the base body during production of the nasal splint, in particular due to the magnetic forces acting between the holding magnets.

[0032] In an expedient embodiment, the at least one auxiliary magnet is formed by an electromagnet, so that the magnetic force can be activated during the manufacturing process and subsequently deactivated again.

[0033] Embodiments of the present invention are described in more detail below with reference to the drawings. They show, in schematic form: Fig. 1 an application device for nasal splints according to one embodiment; Fig. 2 a perspective view of the application device from Fig. 1; Fig. 3 a nasal splint according to an embodiment; Fig. 4 a nasal splint according to a further embodiment; Fig. 5 a nasal splint according to a further embodiment; Fig. 6 the nasal splint Fig. 5 in rolled-up state; the Fig. 7 to 9 Detailed views of the nasal splint from Fig. 5; the Fig. 10 and Fig. 11 Steps in a method for producing a nasal splint 5 according to an embodiment; and the Fig. 12 and Fig. 13 a nasal splint in a further embodiment.

[0034] The Fig. 1 shows an application device 1 for nasal splints. The application device comprises a first hollow body 2A and a second hollow body 2B, which are arranged essentially parallel to one another. An end face 3 of the hollow bodies 2A, 2B facing the patient is open (opening 4), so that nasal splints 5 accommodated in the hollow bodies can be inserted into a patient's nose through the opening 4. The opening 4 extends essentially over the entire end face 3 of the hollow bodies 2A, 2B.

[0035] At the ends facing away from the patient, the two hollow bodies 2A, 2B are connected to each other via a web 6. Furthermore, the two hollow bodies 2A, 2B are spaced apart from each other, forming a gap 7 between them that is open toward the end facing the patient. The width of the gap, i.e., the distance between the hollow bodies 2A, 2B, essentially corresponds to the width of the columella of an average patient. For example, the distance can be between 2 and 10 mm, in particular approximately 5-7 mm.

[0036] In each of the two hollow bodies 2A, 2B, a longitudinally movable plunger or piston 8A or 8B is arranged. Fig. 1, the pistons 8A, 8B are extended so that there is space in the hollow bodies 2A, 2B to accommodate the nasal splints 5.

[0037] At the end facing away from the patient, the pistons 8A, 8B are connected to each other via a web, which forms a common thumb rest 9. Thus, by pressing the thumb rest 9, the pistons 8A, 8B can be moved together toward the end of the application device 1 facing the patient.

[0038] The end face 3 of the hollow bodies 2A, 2B each extends obliquely to the longitudinal axis of the hollow bodies 2A, 2B. The angle between the end face 3 and the longitudinal axis of the hollow bodies 2A, 2B is in the range between 30° and 60°, preferably approximately 45°. As a result, the hollow bodies each have a longer outer side 10 and a shorter outer side 11, with the longer outer sides 10 being located on the inside, i.e., forming the intermediate space 7 between the hollow bodies 2A, 2B.

[0039] A rolled-up or folded nasal splint 5 is arranged in each of the hollow bodies 2A, 2B. In use, the application device 1 is used to insert the splints 5 from the hollow bodies 2A, 2B into a patient's nose. To do this, the hollow bodies 2A, 2B are first partially inserted into the patient's nostrils, with the patient's columella coming to rest in the space 7 between the hollow bodies 2A, 2B. The pistons 8A, 8B are then moved towards the end of the application device 1 facing the patient by pressing the thumb rest 9, so that the nasal splints 5 are pushed through the openings 4 into the nostrils by means of the pistons 8A, 8B. The previously rolled-up nasal splints 5 can then unroll or unfold and rest on the patient's nasal septum. As explained below, the nasal splints 5 are fixed to the patient's nasal septum by magnetic force.

[0040] The Fig. 2 shows the application device 1 from Fig. 1 schematically in perspective view. It can be seen that the hollow bodies 2A, 2B each have a non-circular cross-section. In particular, the cross-section of the hollow bodies 2A, 2B is modeled on the cross-section of the nostrils of an average patient. In cross-section, the hollow bodies 2A, 2B each have a straight side 12 and a round side 13, with the straight sides 12 facing each other and defining the intermediate space 7. Essentially, the cross-section of the hollow bodies 2A, 2B each corresponds to that of a wing, with the straight sides 12 corresponding to the undersides and the round sides 13 corresponding to the top sides of the wing.

[0041] The arrows schematically show the direction in which the nasal splints 5 are ejected from the pistons 2A and 2B when the pistons 8A, 8B are actuated and can be inserted into the nose of a patient.

[0042] In an alternative embodiment not shown, the hollow bodies 2A, 2B are cylindrical, with a circular cross-section.

[0043] The hollow bodies 2A, 2B and the pistons 8A, 8B are made of biocompatible plastic.

[0044] The Fig. 3 shows a nasal splint 5 according to an embodiment for use with the application device 1 from the Fig. 1 and Fig. 2. The nasal splint 5 comprises a base body 14 made of elastic silicone. In particular, the base body is formed from a silicone film with a silicone hardness of approximately 50 Shore. Thus, the base body 14 is sufficiently flexible to be rolled or folded and arranged in the hollow body 2A, 2B of the application device, as shown in the Fig. 1 and Fig. 2 shown schematically.

[0045] The thickness of the base body 14 decreases toward the edge, reducing contact pressure and shear forces in the edge area of ​​the nasal splint and protecting the patient's nasal mucosa. Furthermore, the base body 14 can be manufactured by casting, thus avoiding unwanted edges or burrs at the edge of the base body 14.

[0046] The outer contour of the nasal splint 5 is adapted to the shape of the nasal septum of an average patient. Due to the ability to insert the nasal splint 5 into a patient's nose in a rolled-up state using the application device 1, the nasal splint 5 has a larger surface area than conventional nasal splints. A standard surface area of ​​1685 mm 2This has proven particularly advantageous. A nasal splint 5 designed in this way can be used as a standard for patients with nasal septums of varying sizes. This eliminates the need for individual adjustment of the surface of the nasal splint depending on the patient.

[0047] In the illustrated embodiment, the nasal splint 5 has six circular magnets 15 evenly distributed over the surface of the base body 14. The magnets 15 exert a magnetic force on a nasal splint 5 of the same type arranged on the opposite side of the nasal septum. The magnets 15 are designed and arranged such that the contact pressure on the nasal septum is between 1.9 kPa and 5.6 kPa.

[0048] The Fig. 4 shows the nasal splint 5 in an alternative embodiment. In particular, the nasal splint 5 differs according to Fig. 4 from the nasal splint 5 according to Fig. 3 in the design and number of magnets. In the Fig. 4, the nasal splint 5 has two essentially rectangular magnets 16 arranged parallel to one another. The magnets 16 are otherwise designed such that essentially the same contact pressure is generated as by the magnets in Fig. 3. The magnetic force is determined by the material properties and the volume of the object. Therefore, the goal of achieving the most uniform contact pressure possible can be more easily achieved with a larger number of small magnets than with a few large ones. Magnetic foil represents a maximum expression of this principle.

[0049] The Fig. Figure 5 shows the nasal splint 5 in a further alternative embodiment. In this embodiment, the nasal splint 5 has projections 18 and adjacent projections 19 on one longitudinal edge, as well as complementary projections 18' and recesses 19' on the opposite longitudinal edge. When the nasal splint 5 is rolled up, the projections 18 come to rest in the recesses 19', and the projections 18' come to rest in the recesses 19, as shown by the arrows.

[0050] The Fig. 6 shows the nasal splint 5 from Fig. 5 in the rolled-up state with opposing magnets 17, whereby the magnets 17 operate in the same way as the magnets 15 and 16 from the Fig. 3 and Fig. 4 correspond.

[0051] In the rolled-up state, the projections 18, 18' and recesses 19, 19' engage with each other and are fixed together by a thread or wire 20, as shown in the Fig. 7-9 in detail. The thread 20 is arranged within a hole 21 in the projections 18, 18', which runs parallel to the outer edge of the nasal splint 5.

[0052] After inserting the nasal splint 5 into the nostril of a patient, the thread can be pulled out of the hole 21 so that the fixation is released and the nasal splint 5 can be rolled up.

[0053] The Fig. 10 and Fig. 11 show steps in a method for manufacturing the nasal splint 5 according to one embodiment. Accordingly, a recess 23 shaped corresponding to the magnet 17 is provided in a base body 22 for each magnet 17. After the magnet 17 is received in the recess 23, a cover film 24 is glued to the base body 22, thereby fixing the magnet 17 in the recess 23.

[0054] To fix the magnet 17 in position during the manufacture of the nasal splint 5, a non-ferromagnetic body 25 is arranged beneath the base body 22. The body 25 corresponds in outline to the base body 22. An auxiliary magnet 26 is provided in the body 25, which is arranged beneath the recess 23 and has opposite polarity to the magnet 17. After the cover film 24 has been glued in place, the body 25 can be removed again. Several such auxiliary magnets 26 can be provided, corresponding to the number of magnets 17, with the auxiliary magnets 26 each arranged in alignment with the magnets 17.

[0055] The Fig. 12 and Fig. 13 show the nasal splint 5 in a further alternative embodiment. In this embodiment, a retaining film 27 is provided, which holds the nasal splint 5 in the rolled-up state. Along the junction of the opposite side edges of the nasal splint 5, the retaining film 27 has a perforation 28. By cutting the retaining film 27 along the perforation 28, the nasal splint 5 can be rolled up.

[0056] In one embodiment, the holding film 27 is covered by the cover film 24 (see the Fig. 10 and Fig. 11) was formed. Reference symbol 1 application device 2A, 2B hollow bodies 3 front side facing the patient 4 Opening 5 nasal splint 6 bridge 7 gap 8A, 8B pistons 9 Thumb rest 10 longer outside 11 shorter outside 12 even pages 13 round side 14 basic bodies 15 round magnets 16 rectangular magnets 17 magnets 18, 18' projections 19, 19' recesses 20 threads 21 holes 22 basic bodies 23 Recess 24 cover film 25 non-ferromagnetic bodies 26 Auxiliary magnet 27 Holding film 28 Perforation

Claims

[1] Nasal splint (5) for insertion into the nose of a patient, in particular by means of an application device (1), wherein the nasal splint (5) comprises a base body (14) made of elastic material, wherein complementary projections (18, 18') and recesses (19, 19') are arranged on opposite edges of the nasal splint (5), which engage with one another when the nasal splint (5) is rolled up, wherein the nasal splint (5) has a plurality of magnets (15, 16) which are designed and arranged such that the contact pressure of the nasal splint on the nasal septum of a patient is between 1.9 kPa and 5.6 kPa when a nasal splint (5) of the same type is arranged on the opposite side of the nasal septum. [2] Nasal splint (5) according to claim 1, wherein the thickness of the base body (14) is smaller in an edge region than in the middle of the base body (14). [3] Nasal splint (5) according to claim 1 or 2, wherein the nasal splint (5) has an area between 1,620 and 1,750 mm 2 , and in particular between 1,670 and 1,700 mm 2 has. [4] Nasal splint (5) according to claim 1, 2 or 3, wherein the magnets (15, 16) are rare earth magnets, e.g. NdFeB magnets. [5] Nasal splint (5) according to claim 4, wherein the magnets (15, 16) are glued to the base body (14), in particular in recesses provided for this purpose in the base body (14). [6] Nasal splint (5) according to claim 4, wherein the magnets (15, 16) are baked into the base body (14). [7] Nasal splint (5) according to claim 4, 5 or 6, wherein the base body (14) comprises a carrier film and a cover film (24) and the magnets (15, 16) are arranged between the carrier film and the cover film (24). [8] Nasal splint (5) according to one of the preceding claims, wherein the base body (14) consists of silicone, in particular a silicone film with a silicone hardness of 30-70 Shore, preferably 50 Shore, and / or wherein the base body (14) is adapted to the shape of the nasal septum on which the nasal splint (5) is to be arranged. [9] Nasal splint (5) according to one of the preceding claims, wherein the nasal splint (5) is produced by injection molding. [10] Nasal splint (5) according to one of the preceding claims, wherein the nasal splint (5) is rollable or foldable, and in particular can be arranged in a rolled-up or folded-up state in the hollow body (2A, 2B) of an application device (1). [11] Device set, comprising the nasal splint (5) according to one of the preceding claims, and an application device (1) comprising at least one hollow body (2A, 2B) for receiving the nasal splint (5), and a piston (8A, 8B) movable in the hollow body (2A, 2B), wherein an end face (3) of the hollow body (2A, 2B) is open, so that a nasal splint (5) contained in the hollow body (2A, 2B) can be inserted into the nose of a patient by moving the piston (8A, 8B) out of the hollow body (2A, 2B) through the open end face (3). [12] Device set according to claim 11, wherein the nasal splint (5) is received in a rolled-up or folded state in the hollow body (2A, 2B). [13] Device set according to claim 11 or 12, wherein the at least one hollow body (2A, 2B) has a non-circular cross-section, in particular a cross-section with a substantially straight first side (12) and an opposite round second side (13). [14] Device set according to one of claims 11 to 13, wherein the distal end face (3) of the at least one hollow body (2A, 2B) extends obliquely with respect to the longitudinal axis of the hollow body (2A, 2B). [15] Device set according to one of claims 11 to 14, comprising two hollow bodies (2A, 2B), in particular two hollow bodies (2A, 2B) arranged parallel to one another. [16] Device set according to claim 15, wherein the two hollow bodies (2A, 2B) are connected to one another and an intermediate space (7) is provided between the two hollow bodies (2A, 2B), in which space the columella of a patient can come to rest during an insertion process. [17] Device set according to claim 15 or 16, comprising an actuating element, in particular a thumb rest (9), which is connected to both pistons (8A, 8B) and with which the pistons (8A, 8B) of both hollow bodies (2A, 2B) can be moved simultaneously in the hollow bodies (2A, 2B) with one actuation. [18] Nasal splint device comprising the nasal splint (5) according to any one of claims 1 to 10, and a holding device for releasably holding the nasal splint (5) in a rolled-up or folded state. [19] Nasal splint device according to claim 18, wherein the holding device is formed by one or more detachable threads (20) or a detachable or removable or water-soluble material holding film or a holding film (27) with a perforation (28). [20] Nasal splint device according to claim 18, wherein the holding device is formed by an elastic tube in which the nasal splint (5) is arranged, wherein the nasal splint can be inserted from the elastic tube into the nose of a patient, for example by means of a piston or by compressed air. [21] Nasal splint device according to claim 18, wherein the complementary projections (18, 18') and recesses (19, 19') arranged on opposite edges of the nasal splint (5) can be fixed to one another by the holding device. [22] Nasal splint device according to claim 21, wherein the holding device is formed by a thread or wire (20) arranged within a hole (21) in the projections (18, 18'). [23] Method for producing a nasal splint (5) according to one of claims 1 to 10, wherein the base body (22) has at least one recess (23) for receiving at least one magnet (17), the method comprising: Arranging a non-ferromagnetic body (25) with at least one auxiliary magnet (26) on the base body (22) such that the auxiliary magnet (26) exerts a magnetic force of attraction on a magnet (17) to be accommodated or accommodated in the recess (23); and Attaching, in particular gluing, a cover film (24) on the base body (22) above the magnet (17) in the recess (23). [24] Method according to claim 23, wherein the at least one auxiliary magnet (26) is formed by an electromagnet.

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