DE20114355U1 - Artificial nose for patients with spontaneous breathing via tracheostomy or endotrachial tube - Google Patents

Description

WESTPHAL- M^g&gtil[K5:gt PAfJTJJER

PATENT ATTORNEYS· EUROPEAN PATENT ATTORNEYS

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PLASTOMED Herbert Schmid Schulstrasse 19

57612 Obererbach

- Utility model application -

Artificial nose for patients with spontaneous breathing via tracheostomy or endotrachial tube

D-78048 VSVillinge'n"· Wa'ldVtrasse 33*· Tefe*fon'0772*i 88*3*30 ^# *"Telefax*x 077*2*1 883850

Description

The invention relates to an artificial nose for patients with spontaneous breathing via tracheostomy or endotrachial tube according to the preamble of claims 1, 8 and 19.

The respiratory organs, and in particular the trachea and bronchi, are, due to their function, highly dependent on temperature, relative humidity and cleanliness

&iacgr;&ogr; of the inhaled air. Normally, the nose with its cavities and the blood vessels distributed on the surface, which act as moisture and heat exchangers, warms the inhaled air to about 35°C, brings it to a higher humidity and cleans it of coarser dust and dirt particles.

In patients who have undergone laryngeal surgery or similar, breathing through the nose is usually no longer possible. Such patients are artificially ventilated via so-called tracheostomy or endotracheal tubes. According to the state of the art, it is known to attach a so-called artificial nose to such tracheostomy or endotracheal tubes, which is intended to take over the nasal function described above.

Such artificial noses preferably consist of a substantially closed hollow body with one or more openings for the transfer of the breathing air. A heat storage and/or moisture storage and/or filter medium is usually inserted into this hollow body, which performs the above-mentioned functions of heating, humidity regulation and breathing air filtering.

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Furthermore, the artificial nose has an opening for connecting the tracheostomy or endotrachial tube.

Although such artificial noses have proven themselves to be fundamentally effective, there is still an urgent need to ensure optimal functionality even under adverse conditions.

The invention is therefore based on the object of presenting an artificial nose which no longer has this disadvantage. In particular, the product should have the functionality described above and always ensure that the patient is adequately supplied with breathable air.

This object is achieved according to the invention by an artificial nose having the features of the characterizing part of claims 1, 8 and 19.

Advantageous embodiments and further developments of the inventions are specified in the subclaims.

A key idea of the invention is to ensure that heat storage and/or moisture storage and/or filter media remain dimensionally stable. Previously known artificial noses use heat storage and/or moisture storage and/or filter media which, during use, become wetted with mucus and secretion or absorb these byproducts of the breathing air like a sponge. There is therefore a risk that the medium will collapse, so that its functionality of filtering, air supply, etc. is no longer guaranteed. According to the invention

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Therefore, the artificial nose has a support device for supporting and preventing the collapse of the heat storage and/or moisture storage and/or filter medium.

In the event that the heat storage and/or moisture storage and/or filter medium is designed such that it is essentially positively connected to an inner wall of the above-mentioned essentially closed hollow body, the support device has holding elements which support the heat storage and/or moisture storage and/or filter medium against this inner wall of the hollow body, so that the dimensional stability of the filter medium is ensured.

According to the prior art, as exemplified above, the artificial nose consists of a pot-shaped hollow body in the form of a hollow cylinder with a base and a cylinder shell, onto which a lid, which may be provided with slots, is placed. The heat storage and/or moisture storage and/or filter medium is inserted in a form-fitting manner onto the inner wall of the cylinder shell. In this case, the holding elements are designed according to the invention as support pins or the like, which are arranged in the base and protrude into the inner volume of the closed hollow body in such a way that they either engage in the heat storage and/or moisture storage and/or filter medium or, for example, press against it so that it is not possible for it to escape into the interior.

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According to the invention, the support device, in particular the aforementioned support pins, is made of the same material as the hollow body, i.e. the base material. Chemical reactions due to different materials coming into contact in a moist environment are ruled out from the outset in this case. This also results in manufacturing advantages.

A particularly advantageous embodiment of the invention provides that the support device is formed integrally onto the hollow body. The support device becoming detached from the hollow body and penetrating the patient's respiratory tract are therefore largely excluded.

A particularly advantageous embodiment of the invention further provides that the support device consists of a plastic material which is preferably sterilizable.

It has also been shown that wetting or sponge-like absorption of the heat storage and/or moisture storage and/or filter medium with mucus and secretion during use can not only lead to the collapse of this medium, but that a correspondingly sufficient exchange of breathing air is also not guaranteed if the pores or the like of the medium are closed due to wetting or absorption with mucus and secretion. In this case, the invention provides in particular that the essentially closed hollow body in which the heat storage and/or moisture storage and/or filter medium is located has a vent device in the form of slots in the lid, which open when the

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of the normal breathing air pressure. This ensures that in the event that sufficient breathing air cannot be transported through the medium, breathing air can be transported past it.

A particularly advantageous embodiment results, for example, in the case described above that the artificial nose consists of a pot-shaped hollow body and an unslotted lid, in that the

&iacgr;&ogr; Valve device comprises the cover, which is designed in such a way that when the critical breathing air pressure in the essentially closed hollow body is exceeded, it jumps off and lifts off the latter so that it can be removed. The valve device therefore does not consist of a conventional valve with a membrane or the like, which opens an opening when a certain excess pressure is reached, but rather of a hollow body-cover combination, whereby the valve effect is achieved by appropriate choice of material and shape of the cover and/or the preferably pot-shaped hollow body onto which the cover is placed.

It has been shown that this effect can be achieved in particular by making the lid of a softer material than the open hollow body. In this case, the lid is placed on the open hollow body under a certain pre-tension. This pre-tension is chosen so that the lid can spring open at the desired excess pressure and can then be removed.

Preferably - as already indicated above - the shape of the lid, in particular its edge, as well as

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the attachment area for the lid on the open hollow body are matched to one another so that it can fulfil the above-mentioned function. In a particularly advantageous variant of the invention, the lid has an inward-facing bead with a truncated cone surface and an inner shell surface on its outer circumference, and the open hollow body has an outward-facing bead with a truncated cone surface corresponding to the truncated cone surface of the bead of the lid and an outer shell surface corresponding to the inner shell surface of the bead of the lid. The corresponding beads are preferably matched to one another in such a way that they essentially engage around one another in a form-fitting manner.

The truncated cone surfaces preferably form an angle, in a particularly advantageous embodiment an acute angle. This special design of the corresponding beads was chosen because it makes it possible to release the lid from the open, preferably pot-shaped hollow body with relatively little effort. Tilting is therefore almost impossible. If the internal pressure in the hollow body exceeds a certain value, the corresponding edge or bead area of the lid is pressed along the corresponding surfaces of the bead of the open hollow body so that the lid finally springs open from the open hollow body or can be removed very easily.

It has been shown that jamming or self-locking is prevented when the inner surface of the casing and the

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The outer surface of the corresponding beads must have a distance.

In order to achieve an external form-fitting connection between the lid and the open hollow body, the open hollow body has an annular formation corresponding to the outer edge of the lid. This annular formation has an annular surface which is preferably designed to correspond to an annular surface of the bead of the lid.

In order to ensure that the lid will pop open in the event of excess pressure, the invention provides that the corresponding ring surfaces are spaced apart. This prevents the bead of the lid from tilting or coming into contact with the ring surface of the open hollow body.

As already discussed in detail above, the main problem with regard to the functionality of the artificial nose is that the heat storage and/or moisture storage and/or filter medium inserted into the essentially closed hollow body of the artificial nose is clogged with mucus and secretion during use. To ensure the functionality of the artificial nose, the design variants described above are designed in such a way that a collapse of the heat storage and/or moisture storage and/or filter medium is prevented and that if the respiratory air transfer through the heat storage and/or moisture storage and/or filter medium is not ensured, an exchange of air takes place past the medium. The selected design variant described below

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The solution is based on the knowledge that the smaller the surface area through which the respiratory air is transported, the more likely it is that the medium will become clogged with mucus or secretion. According to the invention, the effective surface through which air transfer must take place is therefore increased compared to the design variants according to the prior art. In concrete terms, this was achieved according to the invention in that the closed hollow body has at least one outer surface facing inwards in order to increase its effective surface area. A parasitic effect that can be achieved in this way is that the effectiveness of the foam filter is also increased.

A particularly advantageous variant is that the inward-facing outer surfaces are designed in the form of recessed grips.

These grips are arranged so that the artificial nose can be held with two fingers. This allows for better haptics when attaching and removing the artificial nose from the patient.

It is advantageous that the grip recesses have one or more openings of the type mentioned above, through which air can be exchanged. Despite the additional function of better haptics provided by the grip recesses mentioned above, this does not make breathing more difficult for the patient, but on the contrary, it is made easier due to the larger active surface of the medium.

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Furthermore, it is intended that the hollow body is designed as a plastic body. The use of a plastic body to form the artificial nose has the advantage that it can be manufactured, for example, using an injection molding process or the like. The molding of recessed grips does not require a great deal of technical effort.

Advantageously, the closed hollow body is designed in the manner of a dumbbell, so that recessed grips are already implicitly present due to the special shape of the hollow body.

According to the invention, the plastic body is formed from the following components: a substantially oval base surface or a substantially dumbbell-shaped base surface, onto which two oppositely arranged long sides and two head ends connecting them are formed in a cylinder-like manner, and a lid that can be placed on the circumference formed by the long sides and head ends. Such a two-part design enables, on the one hand, a low technical outlay for producing the individual parts, and, on the other hand, the above-mentioned heat and/or moisture and/or filter medium can be easily inserted into the hollow body. The molding of recessed grips of the above-mentioned type is also possible in this way without great manufacturing outlay.

According to the invention, the cover is deformable. The use of a deformable cover has the advantage that, on the one hand, only low requirements are placed on the accuracy of fit between the cover and the base body.

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and secondly, due to its deformability, the volume of air enclosed by the artificial nose can be varied to a limited extent. This measure enables the patient to breathe more easily.

The lid also has one or more slots which form an opening and function as a pressure relief valve. As already described above, this opening can make breathing easier for the patient, especially when the filter medium is clogged. On the other hand, secretions can be sucked out from the outside through the opening.

Another feature is that the grip recesses are part of the long sides. This design improves the feel when attaching or removing the artificial nose on the patient.

According to the invention, in one embodiment, the head ends are elliptically curved. Elliptically curved head ends have the advantage that injuries when attaching to the patient can be largely ruled out. In addition, such a shape supports the haptics when connecting the tracheostomy or endotrachial tube.

In a further variant, the artificial nose has a connection piece with an opening above the base. This connection piece is preferably formed onto one of the head ends. An oxygen tube or the like can be attached to this connection piece so that the patient can be additionally supplied with oxygen or a gaseous medication or the like.

Especially in the case of artificial noses with such connection pieces for an oxygen tube, the recessed grips described in detail above have proven to be very useful in making it easier to attach the oxygen tube.

According to the invention, the heat and/or moisture and/or filter medium can also be a foam. A foam can take on all three of the aforementioned functions of a heat carrier, moisture carrier and filter.

In a further variant, the internal volume of the interior is greater than 22.3 ml, preferably 22.8 ml. It has been shown that an internal volume of this size ensures an optimal supply of the patient with breathable air.

Two embodiments of the invention are shown in the drawing and are described in more detail below.

Show it:

Figure 1 shows individual parts of a first embodiment of an artificial nose according to the invention in a perspective exploded view,

Figure 2 shows the artificial nose according to Figure 1 in assembled state in perspective view,

Figure 3 the artificial nose according to Figures 1 and 2 in plan view of a head end,

Figure 4 the artificial nose according to Figures 1, 2 and 3 in section along A-A,

Figure 5 the artificial nose according to Figures 1, 2, 3 and 4 in section along B-B,

Figure 6 shows a second embodiment of an artificial nose according to the invention in perspective view,

Figure 7 the artificial nose according to Figure 6 in plan view from above,

Figure 8 the artificial nose according to Figures 6 and 7 in plan view of a long side,

Figure 9 the artificial nose according to Figures 6 to 8 in section A-A,

Figure 10 the artificial nose according to Figures 6 to 9 in section B-B,

Figure 11 shows the artificial nose according to Figures 6 to 10 in detailed view X.

The artificial nose, as shown in the above-mentioned figures 1 to 5, consists of a dumbbell-shaped plastic body 1 with a base 2, two oppositely arranged long sides 9.1 and 9.2 and two elliptically curved head ends 5.1 and 5.2 connecting them. An interior space 11 is enclosed or formed by this plastic body 1.

A round opening 3 is incorporated in the smooth continuous base 2, into which a cylinder-shaped element 4

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This cylinder-jacket-shaped element 4, which projects above and below the base 2, is designed in such a way that it offers a connection for so-called standard connectors 15 M / mm.

The plastic body 1 has slot-shaped openings at its round head ends 5.2 and 5.3. Grip recesses 8.1, 8.2 are incorporated into the long sides 9.1, 9.2 of the plastic body 1. These are additionally provided with circular openings 10. The openings 6, 10 in the plastic body 1 as a whole serve to supply sufficient breathing air (ambient air) for the patient.

A foam ring 12 is inserted into the hollow body to conform to the inner shape of the interior space 11 of the plastic body 1.

A deformable cover 13 is placed on the upper opening of the cage-shaped plastic body, wherein a bead 14 arranged as an integral component of the cover 13 on its outer circumference releasably surrounds a circumferential bead 15 which is also formed as an integral component of the plastic body 1 on the upper side of the long sides 9.1 and 9.2 as well as the head ends 5.1 and 5.2.

The cover 13 is optionally slit several times, preferably five times, in the middle in the radial direction (slits 17 in Fig. 1), or is unslit (see Fig. 2). A small connection piece 18 with an opening 19 for an external oxygen supply is molded onto the side of the body base 2, to which a small hose can be connected.

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The artificial nose described in detail above takes over the function of the physical nose in patients who have undergone laryngeal surgery and who subsequently require ventilation via a tracheostomy or endotracheal tube (tracheostomy cannula). The patient breathes through the tube inserted into him and the artificial nose attached to it via a standard connector 15 M / mm. When the patient breathes in, the air flows from the outside through the openings 6, 10 in the nasal body. Directly behind the openings

6, 10 the foam ring is located inside the body. This foam ring 12 serves as a filter and keeps dust and dirt particles out of the ambient air. The cover 13 made of an elastic material forms the end of the nose. If small slits 17 are punched into the middle 16 of the cover 13, secretions can be sucked out from the outside through the opening 20 created thereby, and excess pressure which arises in the artificial nose, for example when the patient coughs, can be discharged. An oxygen hose can be attached to the connection piece 18 in the base of the nose 2, so that the patient can be supplied with additional oxygen. Grip recesses are incorporated in the nose body 1. This gives the user a firm grip on component 1, enabling the oxygen hose to be connected securely. After a few breaths, a warming and humidifying effect occurs.

A second embodiment of the invention is shown in Figures 6 to 11. Individual parts that perform identical or similar functions to those individual parts according to the first embodiment according to Figures 1 to 12 are provided with the same reference numerals in the figures referred to below. The drawing figures 6 to

11 it can be seen that this artificial nose also consists of a dumbbell-shaped body 1 of the type mentioned above. The artificial nose according to this embodiment differs from the embodiment described above in particular in that support pins 21.1, 21.2, 21.3 and 21.4 are provided in the base 2, which are aligned essentially perpendicular to the base surface. It is now provided that the foam ring 12 described above, which takes on the function of a heat storage and/or moisture storage and/or filter medium, is inserted between the inner wall of the hollow body 1 and the four support pins 21.1, 21.2, 21.3 and 21.4. In this way, it is prevented that the foam collapses when it becomes clogged with mucus and secretion during use, so that the filtering and air supply would no longer be guaranteed.

From Figure 11 it can be seen that the hollow body 1 and the cover 13 are particularly matched to one another by their shape. In particular, it can be seen from the drawing figure that the cover 13 has an inward-facing bead 14 with a truncated cone surface 29 and an inner shell surface 27 on its outer circumference. Correspondingly, the open hollow body 1 has an outward-facing bead 15 with a truncated cone surface 23 corresponding to the truncated cone surface 29 of the bead 14 of the cover 13 and an outer shell surface corresponding to the inner shell surface 27 of the bead 14 of the cover 13. Furthermore, it can be seen from the drawing that the bead 14 of the cover 13 has an annular surface 30 which adjoins an annular surface 25 of an annular ring arranged on the open hollow body 1.

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Formation 28 connects. The corresponding surfaces are now formed or spaced apart from each other in a special way. The truncated cone surfaces 23 and 29 enclose an angle ä, which is preferably an acute angle. The corresponding surfaces are therefore not arranged parallel to each other or even interlocking. Furthermore, the inner surface 27 of the bead 14 and the outer surface 26 of the bead 15 are spaced apart from each other. It is assumed that

It should be noted that the corresponding surfaces do not have to run parallel to one another, but that the only decisive factor here is that they do not have any points of contact. The ring surfaces 30 and 25 of the hollow body 1 and the bead 14 of the cover 13 are arranged in a similar way.

If excess pressure occurs in the interior 11 of the hollow body 1, the cover 13 will lift as a result. This lifting will cause the truncated cone surfaces 23 and 29 to move further apart. This initially means that the angle ä increases further. This bending of the bead 14 initially poses the risk that the corresponding additional contact surfaces 26 and 27 or 25 and 30 could come into contact with one another. To prevent this, these surfaces are arranged at a distance of 22 or 24 from one another. If these surfaces cannot come into contact with one another, no further forces will occur to prevent the cover 13 from bursting open. Simply by choosing the material for the cover 13 and the hollow body 1 and the choice of the angle ä, it is possible to determine at what excess pressure in the interior 11 the cover 13 will burst open so that it can be easily taken off or removed.

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List of reference symbols

1 plastic body

2 Floor

3 round opening

4 cylinder jacket-shaped element

5 Connection of standard connectors 15 M/mm

5.1 Head end

5.2 Head end

6 slot-shaped opening

7.1 Bridge

7.2 Bridge

8.1 Grip recess

8.2 Grip recess is 9.1 Long side

9.2 Long side

10 round breakthrough

11 Interior

12 Foam ring 13 Lid

14 bead

15 bead

16 Middle

17 Slot

18 connection pieces

19 Opening

20 Opening

21.1 Support pin

21.2 Support pin 21.3 Support pin 21.4 Support pin 22 Distance

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23 truncated cone surface 24 Distance 25 Ring area 26 Outer shell surface 27 Shell inner surface 28 ring-shaped formation 29 truncated cone surface 30 Ring area dl diameter d2 diameter d3 diameter d4 diameter

15 ä angle

Claims (27)

1. Artificial nose for patients with spontaneous breathing via tracheostomy or endotrachial tube - with a substantially closed hollow body ( 1 , 13 ) which has an opening ( 3 ) for connecting the tracheostomy or endotrachial tube and one or more openings ( 10 , 6 ) for the transfer of the respiratory air and - with a heat storage and/or moisture storage and/or filter medium ( 12 ) insertable into the hollow body ( 1 , 13 ), characterized in that a support device ( 21.1 , 21.2 , 21.3 , 21.4 ) is provided for supporting and preventing the collapse of the heat storage and/or moisture storage and/or filter medium ( 12 ). 2. Artificial nose according to claim 1, wherein the heat storage and/or moisture storage and/or filter medium ( 12 ) is designed such that it adjoins an inner wall of the hollow body ( 1 ) in a substantially form-fitting manner, characterized in that the support device has holding elements ( 21.1 , 21.2 , 21.3 , 21.4 ) which support the heat storage and/or moisture storage and/or filter medium ( 12 ) against the inner wall of the hollow body ( 1 , 13 ). 3. Artificial nose according to claim 2, in which the hollow body ( 1 , 13 ) is designed in the manner of a hollow cylinder with a base ( 2 ), a cylinder jacket ( 5.1 , 5.2 , 9.1 , 9.2 ) and a cover ( 13 ), and the heat storage and/or moisture storage and/or filter medium ( 12 ) is positively connected to the inner wall of the cylinder jacket ( 5.1 , 5.2 , 9.1 , 9.2 ), characterized in that the holding elements are designed as support pins ( 21.1 , 21.2 , 21.3 , 21.4 ) or the like, which are arranged in the base ( 2 ) and engage in the heat storage and/or moisture storage and/or filter medium ( 12) or are connected to the heat storage and/or moisture storage medium (12 ). and/or filter medium ( 12 ). 4. Artificial nose according to one of the preceding claims, characterized in that the support device ( 21.1 , 21.2 , 21.3 , 21.4 ) is formed of the same material as the hollow body ( 1 ). 5. Artificial nose according to one of the preceding claims, characterized in that the support device ( 21.1 , 21.2 , 21.3 , 21.4 ) is integrally formed on the hollow body ( 1 ). 6. Artificial nose according to one of the preceding claims, characterized in that the support device ( 21.1 , 21.2 , 21.3 , 21.4 ) consists of a plastic material. 7. Artificial nose according to one of the preceding claims, characterized in that the support device ( 21.1 , 21.2 , 21.3 , 21.4 ) consists of sterilizable material. 8. Artificial nose for patients with spontaneous breathing via tracheostomy or endotrachial tube - with a substantially closed hollow body ( 1 , 13 ) which has an opening ( 3 ) for connecting the tracheostomy or endotrachial tube and one or more openings ( 10 , 6 ) for the transfer of the respiratory air and, - with a heat storage and/or moisture storage and/or filter medium ( 12 ) insertable into the hollow body ( 1 , 13 ), characterized in that the hollow body ( 1 , 13 ) has a valve device ( 13 , 14 , 15 , 22 , 23 , 24 , 26 , 28 ) which opens when the normal breathing air pressure in the hollow body ( 1 , 13 ) is exceeded. 9. Artificial nose according to claim 8, in which the substantially closed hollow body ( 1 , 13 ) has a removable cover ( 13 ), characterized in that the valve device ( 13 , 14 , 15 , 22 , 23 , 24 , 26 , 28 , 29 ) comprises the cover ( 13 ) which is designed to be springable or removable from the substantially closed hollow body (1, 13) when the normal breathing air pressure in the substantially closed hollow body ( 1 , 13 ) is exceeded. 10. Artificial nose according to claim 9, characterized in that the cover ( 13 ) consists of a soft material and the open hollow body ( 1 ) consists essentially of a hard material. 11. Artificial nose according to one of claims 9 or 10, characterized in that the cover ( 13 ) has on its outer circumference an inwardly directed bead ( 14 ) with a truncated cone surface ( 29 ), a
Shell inner surface ( 27 ), and that the open hollow body ( 1 ) has an outwardly directed bead ( 15 ) with a corresponding to the truncated cone surface ( 29 ) of the bead ( 14 ) of the cover ( 13 )
A truncated cone surface ( 23 ) and an outer surface ( 26 ) corresponding to the inner surface ( 27 ) of the bead ( 14 ) of the cover ( 13 ). 12. Artificial nose according to claim 11, characterized in that the truncated cone surfaces ( 29 , 23 ) form an angle (truncated cone surfaces 13. Artificial nose according to claim 12, characterized in that the angle (á) is an acute angle. 14. Artificial nose according to one of claims 11 to 13, characterized in that the inner surface ( 27 ) and the outer surface ( 26 ) of the casing are spaced apart by a distance ( 22 ). 15. Artificial nose according to one of claims 11 to 14, characterized in that the open hollow body ( 1 ) has an annular formation ( 28 ) with an annular surface ( 25 ) arranged corresponding to the annular surface ( 30 ) of the bead ( 14 ) of the cover ( 13 ). 16. Artificial nose according to claim 15, characterized in that the annular surfaces ( 25 , 30 ) have a distance ( 24 ). 17. Artificial nose according to one of claims 9 to 16, characterized in that the cover ( 13 ) has one or more slots ( 17 ). 18. Artificial nose according to one of claims 8 to 17, characterized in that the internal volume of the substantially closed hollow body ( 1 , 13 ) is at least 22 ml. 19. Artificial nose for patients with spontaneous breathing via tracheostomy or endotrachial tube - with a substantially closed hollow body ( 1 , 13 ) which has an opening ( 3 ) for connecting the tracheostomy or endotrachial tube and one or more openings ( 10 , 6 ) for the transfer of the respiratory air and - with a heat storage and/or moisture storage and/or filter medium ( 12 ) that can be inserted into the substantially closed hollow body ( 1 , 13 ) characterized in that the closed hollow body ( 1 , 13 ) has at least one inwardly facing outer surface ( 8.1 , 8.2 ) to enlarge its effective surface. 20. Artificial nose according to claim 19, characterized in that at least two of the inwardly facing outer surfaces are designed in the manner of recessed grips ( 8.1 , 8.2 ). 21. Artificial nose according to claim 20, characterized in that grip recesses ( 8.1 , 8.2 ) have one or more openings ( 10 ). 22. Artificial nose according to one of claims 19 to 21, characterized in that the closed hollow body ( 1 , 13 ) is dumbbell-shaped. 23. Artificial nose according to one of claims 19 to 22, characterized in that the hollow body has the following components: - a substantially dumbbell-shaped base ( 2 ) on which two oppositely arranged longitudinal sides ( 9.1 , 9.2 ) and two head ends ( 5.1 , 5.2 ) connecting them are formed in a cylinder-like manner and - a lid ( 13 ) which can be placed on the circumference formed by the long sides ( 9.1 , 9.2 ) and the head ends ( 5.1 , 5.2 ). 24. Artificial nose according to claim 23, characterized in that a connecting piece ( 18 ) is formed on one of the head ends ( 5.1 ). 25. Artificial nose according to claim 23 or 24, characterized in that the base ( 2 ) has a waviness at least in its edge region. 26. Artificial nose according to one of the preceding claims, characterized in that the hollow body ( 1 ) consists of polypropylene. 27. Artificial nose according to one of claims 3 to 7, 9 to 18 and 23 to 26, characterized in that the cover ( 13 ) consists of thermoplastic elastomer.