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EP2773409A1 - Inhalateur et procédé de production d'un aérosol - Google Patents

Inhalateur et procédé de production d'un aérosol

Info

Publication number
EP2773409A1
EP2773409A1 EP12797738.7A EP12797738A EP2773409A1 EP 2773409 A1 EP2773409 A1 EP 2773409A1 EP 12797738 A EP12797738 A EP 12797738A EP 2773409 A1 EP2773409 A1 EP 2773409A1
Authority
EP
European Patent Office
Prior art keywords
aerosol
filter membrane
nozzle
inhaler
inhaler according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12797738.7A
Other languages
German (de)
English (en)
Inventor
Bjoern O. Soerensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHV Pharma & Co KG GmbH
Original Assignee
CHV Pharma & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CHV Pharma & Co KG GmbH filed Critical CHV Pharma & Co KG GmbH
Publication of EP2773409A1 publication Critical patent/EP2773409A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/009—Inhalators using medicine packages with incorporated spraying means, e.g. aerosol cans
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
    • A61M11/001—Particle size control
    • A61M11/003—Particle size control by passing the aerosol trough sieves or filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/40—Filters located upstream of the spraying outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/28—Nozzles, nozzle fittings or accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers for dispensing liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant
    • B65D83/75—Aerosol containers not provided for in groups B65D83/16 - B65D83/74
    • B65D83/754—Aerosol containers not provided for in groups B65D83/16 - B65D83/74 comprising filters in the fluid flow path
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
    • A61M11/02—Sprayers or atomisers specially adapted for therapeutic purposes operated by air or other gas pressure applied to the liquid or other product to be sprayed or atomised
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M15/00—Inhalators
    • A61M15/06—Inhaling appliances shaped like cigars, cigarettes or pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening

Definitions

  • the invention relates to an inhaler, in particular for generating an aerosol. Furthermore, the invention relates to a method for producing an aerosol by means of a
  • Metered aerosols are known. These are used, for example, as an asthma spray.
  • the inhaler used for this purpose comprises a spray head, over which a particle-containing mist is released. This way you can talk about the
  • Particle mist active ingredients through the lungs particularly quickly enter the bloodstream.
  • Metered dose inhalers due to their particle size quite quickly, which means that the desired dosage is only achieved if the user agrees to inhalation well on the spray.
  • nicotine-containing metered dose inhalers For smoking cessation, especially as a substitute for cigarettes, nicotine-containing metered dose inhalers are known. However, such nicotine-containing metered dose inhalers have so far often not achieved the desired effect. This could be because nicotine is primarily absorbed through the lungs when smoking.
  • known inhalers for producing aerosols generally produce particles of at least 5 ⁇ m in size. Such particles are not respirable and do not enter the alveoli. Rather, the particles predominantly settle in the throat and sometimes even in the bronchi. Thus, nicotine can be absorbed by the body, which reduces withdrawal symptoms. However, due to the slower absorption, the user does not experience the kick typical of smoking due to a rapid increase in nicotine in the blood.
  • Chamber is sprayed. In this chamber, the Speed of the particles due to the longer
  • Metered aerosols usually due to the high pressure with which escape the particles of the spray as well as due to the particle velocity, the temperature of the mist is relatively low, especially well below
  • the invention is based on the object to provide an inhaler and a method for producing an aerosol, in which can be easily generate aerosols with improved lung compliance. It is further an object of the invention that
  • the invention relates to an inhaler. This is
  • Dosage aerosol or an asthma medication includes for this purpose a container with a nicotine-containing solution.
  • a propellant is used to generate an aerosol, which produces an aerosol in a nozzle in a manner known per se to a person skilled in the art.
  • the inhaler comprises a spray head with a nozzle.
  • At least one is in front of the nozzle
  • the volume of a fluid channel between the nozzle and the filter membrane is less than half as large, preferably less than a quarter of the volume of a spray of the
  • Speed of the particles can be reduced without causing blockages of the filter membrane or the retention of aerosol particles.
  • a filter membrane in particular a nonwoven or
  • Screen fabric which is in particular made of plastic, can be used.
  • the filter membrane preferably has a middle one
  • the average pore diameter should be at least 5 times larger such as the mean particle size of the active ingredient contained in the suspension.
  • the filter membrane preferably has an open area which is at most five times, more preferably at most twice, and most preferably at most 1.5 times the cross-sectional area which the nozzle has, from which the aerosol flows out. It is particularly preferred that the open area of the
  • Filter membrane substantially corresponds to the cross-sectional area of the nozzle.
  • the cross-sectional area of the membrane and the open area of the membrane can be achieved depending on the solution or suspension used that a large part of the droplet formation takes place on the filter membrane.
  • the open area of the filter membrane is between _5 and 25% of the total area of the filter membrane.
  • the open area of the filter membrane can be between 2 and 60%
  • a filter membrane with a diameter of 0.5 to 3 mm is preferably used.
  • a perforated plate is used as filter membrane, wherein the holes the perforated plate are at least partially inclined so that the spray is divided into individual beams, which meet at a distance from the perforated plate.
  • the perforated plate with one or more peripheral rings which are inclined relative to the central axis of the perforated plate in such a way that the divided aerosol is focused, as it were, in front of the inhaler at a distance of a few centimeters. This leads to collisions and turbulences in the area in which particles meet, what the middle
  • the trained as a perforated plate filter membrane can also be combined with other layers, in particular nonwoven layers.
  • Filter membrane small than the average particle size of an aerosol generated by the nozzle.
  • an aerosol is first generated by means of a nozzle, which is accelerated in the direction of the filter membrane or pressed through the filter membrane. Due to the finer pores of the filter membrane, a smaller average particle diameter can be achieved in the aerosol leaving the membrane than by means of the nozzle. So can easily be respirable
  • Particles with an average particle size of already 1 ym are already respirable. Depending on the aerosol used, however, it is already inhaled while the aerosol is being inhaled and flows in the direction of the lungs again
  • a filter membrane is thus understood in particular to be any structure, in particular planar structure, which has holes which have a diameter which is smaller than the mean particle size of the aerosol, ie in particular pores in the sense of holes with an average diameter of less than 5 ⁇ m.
  • the filter membrane may in particular be formed as a nonwoven, which has a three-dimensional open-pored structure.
  • a screen mesh is also conceivable. The inventor has also found that in addition to a reduction of the particle size it surprisingly also to a significant reduction in the
  • the aerosol cloud generated by the inhaler according to the invention therefore has a higher residence time than is the case with known inhalers.
  • particles can be produced which on average have less than half the speed, like the particles that enter the filter membrane.
  • the particles Due to the lower speed, the particles are easier to inhale. As a rule, a larger proportion of the particles produced reaches the lungs and the use of the inhaler is simplified for the user in such a way that the spray must be less accurately coordinated with the inhalation.
  • the velocity of the aerosol particles, as they exit the nozzle, is typically between 30 and 100 m / s.
  • Through the filter membrane is preferably the
  • Aersol is actually inhaled in an aerosol cloud and how much of the active substance it contains depending on
  • An advantage of the use of a filter membrane is that it can be made very compact and immediate in front of a nozzle, from which an aerosol emerges, can be arranged.
  • the distance is the
  • Filter membrane in front of the nozzle less than 10 millimeters.
  • at least two filter membranes with different are in front of the nozzle
  • Diameter arranged.
  • first filter membrane in which particles having an average particle size of more than 2 ⁇ m are initially produced.
  • the last filter membrane used should have an average pore size of less than 0.5 ym.
  • the aerosol is partially pressed by different filter membranes or by a different number of filter membranes. It is by means of this embodiment of the invention
  • Spray impulse contain on the one hand a particle fraction, which is respirable and the "Kick" popular with smokers triggers. Another fraction of particles is so large that these predominantly in the bronchi or in the
  • Pharynx be resorbed. Over the slow absorption there can be achieved a long-lasting high nicotine level in the blood after generating the kicks, which leads to the fact that the smoker only after a long time the
  • respirable is respirable. It has been found that due to the usually not optimal coordination of spraying and inhalation also a part of respirable particles remain in the oropharynx and over there
  • the filter membranes can, as provided in a particular embodiment of the invention,
  • a filter membrane occupies a smaller surface area than the other
  • Filter membrane with smaller, average pore diameter occupies a smaller surface area, this can contain almost any shaped recesses.
  • the filter membrane with larger pore diameter is behind this
  • One part of the particles thus passes through two filter membranes, whereas against another part of the particles only the filter membrane with a larger pore diameter is created.
  • the filter membranes can be used as a layer package
  • a filter membrane package which preferably has substantially the contour of a circle, by means of a ring in a housing. This is how a simple and inexpensive way to inhale
  • the spray head of the inhaler comprises filter membranes with at least three
  • the spray head may also contain four or more superimposed filter membranes.
  • at least one filter membrane is connected to a support layer which has a larger pore diameter than the filter membrane.
  • the support layer which also acts as a filter membrane
  • the thickness of the filter membrane can be reduced, which reduces the flow resistance of the layer package.
  • a support layer is used which
  • the support layer has at least three times, preferably at least five times the pore diameter of the filter membrane. Furthermore, the support layer preferably has twice, and more preferably at least three times, the thickness of the filter membrane.
  • the at least one filter membrane can both be
  • a filter membrane is arranged on both sides of the support layer.
  • the layer package can for example be clamped edge side, glued or welded, or glued surface or selectively or welded.
  • Aerosol is usually between 4 and 10 ym.
  • the inhaler is with a nicotine-containing solution at a concentration of 0.3-20 mg / ml, preferably 1 - 10 mg / ml and more preferably 4 to 8 mg / ml filled.
  • the inhaler is preferably designed such that a spray contains 0.05 to 0.5 mg, preferably 0.1 to 0.3 mg, of nicotine.
  • the inhaler is filled with a solution which contains at least one organic acid, in particular acetylsalicylic acid, ascorbic acid, citric acid and / or malic acid.
  • an acid reduces the pH of the solution, in particular the nicotine-containing solution. So it is particularly possible, an aerosol with a pH of less than 7.5; preferably less than 7,
  • the acid can serve as a flavoring.
  • the acid may also serve as an active ingredient to concurrently the arteries
  • the solution used for the inhaler contains an organic or
  • the solution preferably contains carbonates and / or bicarbonates. Particularly preferably, the solution contains alkali metal bicarbonates and most preferably sodium bicarbonate.
  • the content of bicarbonate is preferably 10 to 50 mg / ml, preferably 25 to 45 mg / ml. This is advantageous because, in an aqueous environment, especially on the oral mucosa, a pH of 6.5 to 7 can be obtained. This pH is beneficial for the uptake of nicotine via the oral mucosa.
  • the addition of carbonates can serve as a buffer for the pH, in particular with the simultaneous addition of an acid
  • the solution contains ascorbic acid as organic acid.
  • a content of ascorbic acid of 20 to 75 mg / ml, preferably 27 to 65 mg / ml and most preferably from 30 to 45 mg / ml has been found to be particularly advantageous.
  • a spray thus preferably contains 0.5 to 1.5 mg
  • the smoker When ascorbic acid is used, the smoker receives the vitamin C, which is particularly important for smokers, when using the inhaler.
  • inhaler according to the invention can also be used for the following exemplified active substances or combinations thereof:
  • Bupropion cathine (D-norpseudoephedrine), cathinone ( ⁇ -ketoamphetamine), chlorpheneramine, dibucaine, dimemorphan dimethyltryptamine, diphenhydramine, ephedrine, hordenine,
  • Hyoscyamine i35coline, levorphanol, lobeline, mescaline, mesembrine, mitragynine, muscarine, parahydroxyamphetamine, Procaine, pseudoephedrine, pyrilamine, raclopride, ritodrine, scopolamine, sparteine (lupinidine), ticlopidine, 1,2,3,4-tetrahydroisoquinoline, anabasine, anatabine, cotinine,
  • the invention further relates to a method for producing an aerosol, wherein an aerosol is generated by means of a nozzle, in which a valve is opened and the aerosol flows out of the nozzle and then passes through a filter membrane.
  • the aerosol after the nozzle preferably passes through a fluid channel which leads to the filter membrane and whose volume is so small that a pressure builds up in the fluid channel which at least partially prevents aerosol formation in the fluid channel. A part of the aerosol thus arises only when the still liquid aerosol leaves the filter membrane.
  • the invention further relates to a method for producing an aerosol, in particular by means of an inhaler as described above. In this case, an aerosol with an average particle size of more than 3 ym is generated by means of a nozzle, which is separated by at least two filter membranes with different mean
  • Pore diameter is pressed, the same as before
  • a first fraction having an average particle size of less than 1.5 ⁇ m and another fraction having an average particle size of more than 2 ⁇ m are produced.
  • the invention further relates to the use of an inhaler described above for producing an aerosol having at least 2 fractions of particles with different average particle size, wherein
  • the average particle size of a fraction differs by at least 0.5, preferably at least 1 ym, from the particle size of the other fraction.
  • the particle sizes can, for example, by means of
  • Laser interferometry can be determined.
  • FIGS. 1 to 17 DESCRIPTION OF THE DRAWINGS The invention will be described below with reference to the drawings, FIGS. 1 to 17, with reference to FIG.
  • FIG. 1 shows, schematically illustrated, a sectional view of the spray head of an embodiment of a
  • Components such as reservoir, actuators, etc., which are not shown in detail below, as these are known from the prior art, for example of metered dose inhaler containers for asthma.
  • the spray head 1 has a housing 2. Via a nozzle 3, an aerosol with a mean particle size of over 4 ym is pumped into a chamber. In the area of the nozzle 3, the chamber 4 has a diameter of a few millimeters and widens in the direction of a membrane packet consisting of the filter membranes 5 to 8. There is the
  • the filter membranes 5 to 8 are inserted into the housing 2 and are fixed by the ring 9 inserted in the housing 2. This ring can be clamped, glued or
  • a membrane with a mean pore diameter of this embodiment 2 ym In the membrane packet is arranged as a first filter membrane 5, a membrane with a mean pore diameter of this embodiment 2 ym. This extends over the entire diameter. Then follows the membrane 6 with a very small average pore diameters of 0.25 ym. However, this membrane only occupies part of the area of the membrane packet. On the membrane 6 followed by membrane 7 with a middle
  • Membrane can pass through more or less unhindered. In the overlap region of the membrane 5 with the membrane 7, that is, at the locations where the membrane 6 is not arranged in the membrane 7, the leaked from the membrane 5 particles pass through the filter membrane 7. On the
  • Filter membrane 7 follows the filter membrane 8 with a
  • Layer a filter membrane is arranged, which occupies the entire surface area of the membrane packet, since this serves as a support for the other membranes.
  • the particles produced by the nozzle 3 can thus be divided into three particle fractions
  • a part of the particles passes through the membrane 6 as well as the other membranes that are in contact and have a decreasing diameter.
  • the fraction of particles that passes through all the filter membranes has the smallest mean particle diameter.
  • Pore diameter can be almost any
  • Particle size distribution can be adjusted.
  • a further nozzle 10 is provided, via which a propellant is injected into the chamber 4.
  • a propellant is injected into the chamber 4.
  • this propellant which preferably in a separate
  • Container of the inhaler is introduced, 4 pressure is generated in the chamber, which causes the particles generated by the nozzle 3 are pressed through the membrane package.
  • Fig. 2 shows the membrane package shown in Fig. 1 in plan view
  • the illustration in Fig. 1 is a
  • the filter membranes 6 and 7 comprise a circular central part, which is held by webs extending to the ring in which the
  • Membrane packages is held extend. Between these webs is the area in which the respective filter membrane is recessed, so that the particles do not pass through the respective filter membrane.
  • the first filter membrane 5 after the nozzle which has the shape of a circle, can first be seen in FIG. This has a mean pore diameter of 2 ym.
  • Fig. 4 shows the subsequent membrane 6, which has a circular central region, on which webs extend, which can be clamped between ring and housing (shown in Fig. 1).
  • Fig. 5 shows the following membrane 7 with an average pore diameter of 0.5 ym. This corresponds in the
  • Fig. 6 shows the last membrane 8 of the filter membrane package, which is circular in shape with a mean pore diameter of 1 ym.
  • Fig. 7 shows an example calculated
  • Membrane package It can be seen that the theoretical particle sizes are between 0.5 and 2.3 ⁇ m and in particular that a large part of the particles has an average particle size of less than 1 ⁇ m.
  • Fig. 8 shows a further embodiment of the invention, in which between the filter membranes 12 and 14 a
  • Support layer 13 is arranged.
  • the support layer 13 serves for the mechanical stabilization of the filter membranes 12 and 14.
  • the filter membranes 12 and 14 may therefore be made particularly thin without the risk of tearing exists. As a result, the flow resistance of the sandwich composite thus provided is reduced.
  • the support layer 13 is also a filter membrane, which however is thicker and has a substantially larger pore diameter.
  • Pore diameters are used with a diameter between 0.5 ym and 5 ym, whereas the support layer has a pore diameter of about 20 ym. Despite its thickness, the support layer therefore provides little resistance to the particles of the aerosol.
  • the sandwich composite for example, along the
  • the sandwich composite shown in FIG. 8, comprising the filter membrane layers 12 and 14 and the support layer 13, is integrated in the housing 2.
  • the sandwich composite of the layers 12, 13 and 14 is clamped by means of the ring 9 in the housing 2.
  • the ring 9 comprises at least one bead 15, which engages in a corresponding groove of the housing 2. It is understood that in addition to or alternatively the sandwich composite can also be glued or welded in addition to a clamp connection.
  • FIG. 10 shows a further embodiment of the invention, in which a part of the housing with the at least one filter membrane is fastened in a detachable carrier 16.
  • FIG. 10 otherwise corresponds to the embodiment of FIG. 9, wherein it can be seen that in particular the attachment of the filter membrane can also be done in other ways.
  • the housing 2 in this embodiment comprises a removable carrier 16.
  • the lower comprises
  • Housing part front side a diameter-tapered section with an external thread.
  • the carrier 16 includes an internal thread, so that the two housing parts via the thread 17 are joined together.
  • Carrier can also be designed removable in other ways, for example by means of a clamping or
  • the carrier 16 may have a structured outer side for better gripping and / or means to remove the carrier 16 by means of a handling tool.
  • the carrier 16 is without use of a
  • Filter membrane such as when aerosol drops
  • Aerosol formation takes place mainly on the flow side behind the filter membrane.
  • a housing 2 with a receptacle 19 for a commercial aerosol vial which has a diameter of 0.5 to 2 mm.
  • the slightly oblique shot 19 goes into one
  • Fluid channel 18 via. At the end of the fluid channel, in which this on a
  • Diameter of 3 to 5 mm expands, is fixed by means of the ring 9 designed as a nonwoven filter membrane. This has a mean pore diameter of 10 to 20 ym.
  • the volume of the fluid channel 18 is now dimensioned such that the volume of the aerosol of a spray at
  • Standard conditions according to SATP is at least five times that.
  • the open area of the filter membrane 5 is dimensioned such that it is at most twice as large as the inside diameter of the nozzle (not shown) used in the receptacle 19 of the aerosol vial.
  • the filter membrane 5 still has a much larger diameter than the nozzle, since the open area is only about 5 to 15% of the total area.
  • Propellant remains in the liquid state and there is an aerosol formation after passing through the filter membrane 5.
  • Fig. 12 another embodiment will be explained. This essentially corresponds to the components of FIG. 11.
  • Embodiment a perforated plate with inclined channels 21 used. Via the channels 21, the spray is divided into several beams and at some distance in front of the inhaler
  • a fleece 23 may be used to provide finer pores in front of the filter membrane 5 formed as a perforated plate 20.
  • Both the nonwoven 23 and the perforated plate 20 are fixed by the ring 9.
  • Fig. 13 shows how the spray is divided and focused by the perforated plate 20 into a plurality of beams.
  • Aerosols which slows down the speed.
  • FIGS. 15 and 16 show different ones
  • Fig. 15 shows an alternative embodiment of a perforated plate with a central hole, which is exactly perpendicular to
  • the perforated plate is arranged and that extend around eight more oblique holes, which focus the split into multiple jets of spray.
  • Fig. 16 only four holes are arranged around the central hole, but the diameter of the holes is slightly thicker. Even when using a perforated plate as a filter membrane, the total open area should be a maximum of twice as large as the inner surface of the inner diameter of the nozzle, from which the aerosol emerges.
  • Fig. 17 shows two tables of results of one
  • Pulmonary function tests in which a subject has taken by inhaler the same amount of the active substance salbutamol, a bronchospasmolytic.
  • Table 1 shows the subjects' values using a conventional inhaler comprising only a nozzle but not a membrane.
  • Table 2 shows the values of the subject, with a
  • Inventive inhaler was used with a membrane which was used as a nonwoven with an average pore size of 15 ym is formed.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Anesthesiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Pulmonology (AREA)
  • Medicinal Preparation (AREA)

Abstract

L'invention concerne un inhalateur comprenant une buse de pulvérisation devant laquelle est disposée une membrane filtrante.
EP12797738.7A 2011-11-04 2012-11-05 Inhalateur et procédé de production d'un aérosol Withdrawn EP2773409A1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE102011117612 2011-11-04
DE102012001526 2012-01-27
DE102012003930 2012-03-01
DE102012108090 2012-08-31
PCT/EP2012/071847 WO2013064690A1 (fr) 2011-11-04 2012-11-05 Inhalateur et procédé de production d'un aérosol

Publications (1)

Publication Number Publication Date
EP2773409A1 true EP2773409A1 (fr) 2014-09-10

Family

ID=47297121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12797738.7A Withdrawn EP2773409A1 (fr) 2011-11-04 2012-11-05 Inhalateur et procédé de production d'un aérosol

Country Status (2)

Country Link
EP (1) EP2773409A1 (fr)
WO (1) WO2013064690A1 (fr)

Families Citing this family (12)

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WO2015042412A1 (fr) 2013-09-20 2015-03-26 E-Nicotine Technology. Inc. Dispositifs et procédés de modification de dispositifs de distribution
WO2015091346A2 (fr) * 2013-12-16 2015-06-25 Chv Pharma Gmbh & Co. Kg Produit succédané de tabac
EP3095522A1 (fr) * 2015-05-20 2016-11-23 Aptar Radolfzell GmbH Dispositif d'inhalation, kit pour un dispositif d'inhalation et porte-filière associé
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