1. Field of the Invention
The present invention relates to a dispensing device for dispensing a formulation as a spray. The preferably medical formulation particularly contains or consists of a drug or mixture of drugs, to a storage device for a dispensing device for dispensing a formulation as a spray, and to a method for dispensing individually doses of a formulation as a spray
2. Description of Related Art
Drugs delivered through dispensing devices, in particular inhalers, are intended to optimally target specific sites in the pulmonary system. These sites include the nasal passages, the throat, and various locations within the lungs, such as the bronchi, bronchioles and alveolar regions. The ability to deliver drugs to a target area depends inter alia on the aerodynamic sizes of the particles or droplets. As currently believed to be understood, particles having an aerodynamic diameter of less than 2 micrometer are considered to be potentially optimal for deposition in the alveolar region of the lung. Particles that have an aerodynamic diameter of between 2 and approximately 5 micrometer may be more suitable for delivery to the bronchiole or bronchi regions. Particles with an aerodynamic size range greater than 6 micrometer, and more preferably 10 micrometer, are typically suitable for delivery to the laryngeal region, throat or nasal passages.
In most cases, it is desired to achieve a high inhalable fraction and a high delivery efficiency, i.e., the fraction of the initial dose of drug that reaches the desired region, in particular in the lung. This depends on various factors, in particular on the characteristics of the generated spray plume, such as propagation velocity of the plume, particle size and its distribution, fraction of small particles, fraction of gas or the like. In the present invention, the desired spray plume characteristics include preferably a small particle size, a high fraction of drug particles with a diameter of 6 micrometer or less, a low propagation velocity and/or a long duration of spray generation and possible inhalation.
Most powder inhalers are of the passive type where the powder is inhaled by the patient without the aid of an additional energy source. The problem with passive inhalers is that the inhalable fraction, or the proportion of powder that actually enters the lungs, is largely dependent on the breathing of the patient. The transfer and de-agglomeration of the powder and hence the inhalable fraction is a function of the flow rate of inhaled air through the device and, therefore, varies greatly from patient to patient.
Dry powder inhalers are subdivided into single dose and multi-dose devices or inhalers. Multi-dose inhalers are further subdivided into pre-metered types where the doses are stored individually and into metering inhalers where each powder dose is metered in the device.
Multi dose pre-metered inhalers have the advantage that the single doses are metered under strict factory conditions and the powder can quite easily be isolated from the atmosphere. In many applications the active drug powder is mixed with a carrier such as lactose. The lactose and/or active drug(s) tend to absorb humidity from the atmosphere, which makes them stick together and difficult to transfer and de-agglomerate.
U.S. Pat. No. 4,627,432 discloses a device for administering medicaments to patients, namely an inhaler. The inhaler comprises a disk-like blister pack having a plurality of blister pockets arranged in a circle. Each blister pocket contains a dose of the powder. A plunger can open a blister pocket. When a blister is opened, the medicament can be withdrawn by a patient inhaling through a mouthpiece.
International Patent Application Publication WO 2005/002654 A2 discloses a passive device for dispensing individual doses of powder. The doses are contained in respective pockets of a disc-shaped carrier and opened by outwardly rupturing a foil lid in an axial direction by means of pressure on an opposite side surface. The pockets are moveable in axial direction into an airstream generated by breathing of a patient for dispensing a dose of powder from the pocket. The device provides individual respective deaggregation flow paths for each pocket, split airstreams allowing improved entrainment of powder, a cam mechanism for outwardly rupturing the pockets, an indexing mechanism linked to the cam mechanism, and a dose counter.
It is difficult to empty the respective pocket completely during a dispensing operation. Incomplete emptying results in decreased delivery efficiency. Some powder may be lost in the inhaler and not dispensed because the known solutions require relatively long paths for the powder until the powder reaches a nozzle and is actually dispensed. This might reduce the delivery efficiency further. In addition, de-agglomeration of the powder is difficult.
A good dispensing of pre-metered doses of the formulation can be achieved if individual atomizing devices, such as nozzles, are used to atomize the respective dose, i.e., to generate a spray or aerosol (the term “aerosol” can also be used if a powdered formulation is atomized). In the assignee's International Patent Application Publication WO 2008/138631 A2, the doses are contained in inserts as storage members, each comprising a respective atomizing device, in particular a duct, nozzle or the like. The inserts are moveably contained in cavities or receptacles and sealed. The inserts are moved outwardly to rupture the respective sealing before discharging the respective dose. This requires a respective actuation. The ruptured sealing may interfere with the generated spray. The outward movement requires respective space. Therefore, there is a need for a facilitated construction requiring less size and/or allowing a defined opening of outlet openings, in particular of atomizing devices. A similar dispensing device is disclosed in commonly owned U.S. Patent Application Publication 2008/0283055 A1
The present invention relates to the dispensing of a preferably medical formulation. The term “formulation” relates in particular to powder, but may include or relate to liquid as well. Consequently, the fine “particles” may be either solid or liquid. The term “liquid” has to be understood preferably in a broad sense covering inter alia solutions, suspensions, suslutions, mixtures thereof or the like. More particularly, the present invention relates to the dispensing of formulations for inhalation, such as medical formulations containing or consisting of at least one drug.
In the following, the description will focus mainly on powder formulations. However, the same applies for liquid formulations.
In particular, the present invention is concerned with dry powder inhalers for the delivery of drugs to the lungs. Many dry powder inhalers are on the market or have been proposed. There are two main types, namely the passive ones and the active ones. In passive inhalers all the energy required for de-agglomerating the powder and transferring the powder to the lungs is provided by the breathing of a user, respectively the patient. In active inhalers there is an additional source of energy to help to transfer and de-agglomerate the powder.
The present invention relates in particular to an active, gas (preferably air) powered, pre-metered multi-dose dispensing device for dispensing a formulation containing or consisting of a drug, such as a dry powder inhaler.
An object of the present invention is to provide an improved dispensing device, storage device and method for dispensing a preferably medical formulation, in particular allowing a facilitated construction requiring less size and/or allowing a defined opening of outlet openings, in particular of atomizing devices.
The above object is achieved by a dispensing device according to invention as described herein.
According to a first aspect of the present invention, the dispensing device comprises an opening device in addition to a connecting element for supplying pressurized gas individually to storage members containing the doses of the formulation. The opening device is adapted to individually open an outlet seal of an outlet opening for each storage member, wherein the opening device is adapted to work independently of any movement of the connecting element and/or to peel the seal. This allows a facilitated construction requiring less size and/or allowing or securing a defined and/or complete opening of outlet openings, in particular of atomizing devices.
According to a second aspect of the present invention, the storage device comprises inserts received in cavities or receptacles. Each insert comprises a storage chamber containing a dose of the formulation and an atomizing device, such as a duct or nozzle, for dispensing the respective dose as spray or aerosol. Outlet openings of the cavities, receptacles, inserts or atomizing devices are sealed by a preferably common outlet seal and can be opened individually. The inserts are unmovable in the cavities or receptacles. The outlet openings are opened independently of any movement of the inserts. This allows a facilitated construction requiring less size and/or allowing a defined opening of outlet openings, in particular of atomizing devices.
According to a third aspect of the present invention, the outlet openings of the storage device covered by a seal are individually opened by winding up the seal onto a wheel with spring-like arms and/or variable diameter. Thus, any potential variation of the winding speed can be compensated. This allows a facilitated construction requiring less size and/or allowing a defined opening of outlet openings, in particular of atomizing devices.
An advantage of the present invention is, in contrast to moveable inserts as storage members for foil opening, that peeling eliminates the possibility of a foil flap interfering with the insert exit ducts and thereby upsetting the flow pattern.
An advantage of the present invention is, in contrast to moveable inserts for foil opening, that peeling eliminates the possibility of any insert sealing foils being damaged when the insert is pushed out through the holder sealing foil. The insert foil could deform leading to an exit cross-sectional area that is less than that required. Peeling avoids this.
An advantage of the present invention is, in contrast to moveable inserts for foil opening, that the subassembly unit containing the spring and bellows requires less movement since the insert does not have to be pushed out.
An advantage of the present invention is, in contrast to moveable inserts for foil opening, that the failure possibility is less and that less push force is required.
An advantage of the present invention is, in contrast to moveable inserts for foil opening, that no feature is required to push inserts back during rotation and that the friction is less when rotating the carrier of the storage device with the inserts.
The above and other aspects and features of the present invention will be apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings.
a is a schematic view of a first peeling concept for opening the storage device;
b is a schematic view of a second peeling concept for opening the storage device in a first state;
c is a schematic view of the second peeling concept for opening the storage device in a second state;
In the figures, the same reference signs are used for the same or similar parts and components, wherein preferably the same or similar features, aspects and/or advantages are achieved in the different embodiments, even if a repetition of the respective description is omitted.
Preferably, the dispensing device 1 is portable and/or hand-held.
The dispensing device 1 may be used for dispensing any formulation 2 as defined in the introductory part of the description. In particular, a medical formulation 2 or a formulation 2 for inhalation will be used. The formulation 2 preferably contains or comprises at least one drug. When the formulation 2 is dispensed, a spray 3 is generated as indicated in
The formulation 2 may be a liquid, in particular a solution, a suspension or any mixture thereof, i.e., a so-called suslution. Preferably, when different drugs are dispensed simultaneously, a suslution may be used. The principle of the suslution is based on that different drugs may be combined in one formulation simultaneously as a solution and as a suspension. In this respect, reference is made to European Patent Application EP 1 087 750 A1, which is incorporated herein as additional disclosure in this respect.
Preferably, the formulation 2 is a powder. The powder may be a pure drug or a mixture of at least two drugs or any other mixture of at least one drug. In addition, the powder may contain at least one other material, in particular a drug carrier, such as lactose. In the following, the description focuses on powder as formulation 2. However, this applies in a similar manner if a liquid formulation 2 is used.
Preferably, the mean diameter of the powder particles is about 2 to 7 μm, in particular, 6 μm or less. This applies in particular if the powder does not contain any drug carrier, such as lactose.
If the powder contains a drug carrier, such as lactose, and at least one drug, the powder 2 may have a particle size of 20 to 300 μm, in particular about 30 to 60 μm. However, the de-agglomeration, which will be described later in more detail, may result even in this case in a spray 3 with a smaller particle size, e.g., of about 10 μm or less. In particular, the drug may be separated from the drug carrier during de-agglomeration so that primarily the drug will be inhaled due to its small particle size of about 2 to 6 μm and the larger drug carrier will be swallowed when using the dispensing device as an inhaler. Alternatively or additionally, breaking or opening of the drug carrier is possible during de-agglomeration.
The diameters mentioned above and below may be understood as mass medium aerodynamic diameters and/or may apply to the particle size or a fraction of the particles of the spray 3.
Preferably, the formulation 2 is pre-metered in separate or individual doses, which can be discharged one after the other by the dispensing device 1, in particular, for inhalation.
The dispensing device 1 is adapted to receive or comprises a storage device 4 for storing preferably multiple and pre-metered doses of the formulation 2. The storage device 4 may be integrated into the dispensing device 1 or form part of the dispensing device 1. Alternatively, the storage device 4 may be a separate part that can be inserted or connected with the dispensing device 1 and optionally replaced.
The storage device 4 preferably comprises a carrier 5 and at least one storage member, preferably multiple storage members. Preferably, the storage members are inserts 6. Therefore, the word “insert” is used in the following.
In particular, the carrier 5 may comprise or support 20 to 100, preferably 30 to 60 inserts 6. Each insert 6 contains preferably one pre-metered dose of the formulation 2. However, each insert 6 may also contain more than one formulation 2, i.e., different formulations 2. Additionally or alternatively, different inserts 6 may contain different formulations. In the present invention, “different” means, in particular, that the formulations 2 differ in at least one of the composition, the drug, the dose or amount, the concentration, and consistence of the formulation 2, e.g., liquid or dry powder.
The storage device 4 or carrier 5 comprises preferably multiple cavities 7 or receptacles for receiving or with the inserts 6. In particular, each insert 6 is located in a separate cavity 7. Preferably, the cavities 7 are separate from each other and, in particular, sealed against each other.
In the present embodiment, each cavity 7 comprises at least one outlet opening 8a, in particular, also an opposed receiving opening 8b (here, at the radially inner and outer circumference or periphery).
The cavities 7 or its openings 8 are covered by respective covers or seal 9a, 9b, which are, preferably, formed by heat-sealed foils on opposite sides of the respective cavity 7 or the carrier 5. In the present embodiment, the seals are in particular a metallic foil, such as aluminum foil, a plastic foil, a multi-layer arrangement or the like. The seals preferably protect the inserts 6 and/or formulation 2 against humidity, dirt, moisture and/or the like. The seals are respectively resistant and/or impermeable, in particular gas-tight.
In this preferred embodiment, the storage device 4 or carrier 5 is ring-like and the cavities 7 and/or inserts 6 extend at least substantially in radial direction. The cavities 7 are distributed around the perimeter of or along the storage device 4 or carrier 5, preferably equally spaced relative to the adjacent cavities 7.
The outlet openings 8a and/or outlet ends of the insert 6 are covered by a preferably common seal 9a, which extends ring-like or along the circumference. The receiving openings 8b are covered by the preferably common inner sailing 9b, which extends preferably ring-like or along the circumference.
In the present embodiment, the storage device 4/carrier 5 is preferably rotatable around axis 13 shown in
The carrier 5 may be a molded element, a ring, a strip, a cartridge, a blister or a container. Preferably, the storage device 4 or carrier 5 is rigid or at least essentially stiff.
Preferably, the carrier 5 is made of foil, plastics, ceramics and/or composite material, in particular of thermoplastics or thermoplastic elastomers.
Each cavity 7 or receptacle preferably forms a holder for the associated insert 6, in particular so that the insert 6 is not moveable in a direction toward the outlet, i.e., outwards of its outlet opening 8.
Each insert 6 is preferably produced filled with the respective dose of formulation 2 separately from the storage device 4 or carrier 5, and then, inserted into its respective cavity 7 or receptacle.
Preferably, each insert 6 is molded and/or made of foil, plastics, ceramics and/or composite material, in particular of thermoplastics or thermoplastic elastomers and for seals of elastomers or silicone.
According to a preferred embodiment, the carrier 5 and/or the inserts 6 are made of at least one of the following materials or any mixture or blend thereof: ABS (acrylonitril-butadiene-styrene copolymer); SAN (styrene-acrylonitril-copolymer); PBT (polybutylene terephthalate); PC (polycarbonate); CA (cellulosic acetate); EVA (ethylene vinylacetate copolymer); PA (polyamide); PE (polyethylene); PP (polypropylene); PMMA (polymethylmethacrylate); POM (polyoxymethylene, polyacetal); PPS (polyphenylene sulfide); PS (polystyrene); PBTP (polybutylene terephthalate); TPU (thermoplastic polyurethane); blend of PC and PBTP; blend of PC and ABS; LCP (liquid crystal polymers); PHCS (polypyrrol or polythiophene); PPA (polyphthalamide); PSU (polysulfone); PTFE (polytetrafluorethylene); PUR (polyurethane); SB (styrene-butadiene copolymer); PIB (polyisobutylene); PAN (peroxyacylnitrate); PET (polyethylene terephthalate); AMMA (acrylonitril-methymethacrylat copolymer); PAR (polyarylate); PEEK (polyetheretherketone); COC (cycloolefine copolymer).
Each insert 6 may form a preferably block-shaped unit and/or be rigid. Alternatively, the inserts 6 may be flexible. In particular, each insert 6 may be a unitary unit or is formed of multiple elements. In particular, the insert 6 forms one component or is made of one piece. Each insert 6 may be a molded element, a cartridge, a blister, a capsule, a container or the like.
In the following, a preferred construction of one insert 6 is explained. Preferably, all inserts 6 are identical. However, it is also possible that all or some inserts 6 are different. For example, two or more groups of different inserts 6 can be provided. It is possible that one group has a different dose or different formulation 2 than the other group. For example, the inserts 6 of the different groups could be arranged alternately one after the other so that a patient or user may use, for example, an insert 6 of one group each morning and an insert 6 of the other group each evening.
Each insert 6 preferably comprises a storage chamber 10 for a single dose of the formulation 2. The schematic sectional views according to
In the present embodiment, the storage chamber 10 is preferably formed in a molded base member 11 of the insert 6.
The insert 6/base member 11 further comprises an individual atomizing device, such as a duct 12, nozzle or the like, for de-agglomerating and/or discharging the formulation 2 during the dispensing operation, in particular, for atomizing the formulation 2. The formulation 2 is dispensed through the atomizing device during the dispensing operation, in particular for directly forming the spray 3.
In the present embodiment, the duct 12 is flat and/or rectangular in cross section. In particular, the cross section corresponds to a hydraulic diameter of less than 1 mm. In particular, the duct 12 is designed as described in International Patent Application Publication WO 2006/037636 A2 and corresponding, commonly owned, co-pending U.S. patent application Ser. No. 12/120,803 (Publication 2007/0272763 A1), which are hereby incorporated by reference.
According to another embodiment (not shown), the duct 12 can also be used as a reservoir (storage chamber 10) for the formulation 2. In this case, the separate storage chamber 10 is not required. Then, the duct 12 is designed to enable sufficient mixing of the gas with the formulation 2 and sufficient de-agglomeration of the powder formulation 2.
Preferably, the spray 3 having its desired spray characteristics is directly ejected or discharged from the insert 6/atomizing device or is generated by the atomizing device only.
In particular, the insert 6 forms one component or is made of one piece.
The insert 6 or atomizing device can comprise or form a nozzle arrangement, preferably at an outlet 15 or end of duct 12 or formed by duct 12.
Preferably, the storage chamber 10 and/or the atomizing device or duct 12 is formed by or in the base member 11, in particular by a recess, groove or the like in the base member 11 and by an associated cover member 14 as shown in
It is noted that the inserts 6 may be or are preferably open, i.e., not sealed, in particular, at its respective outlet opening 15 only. Experiments have shown that sealing of the carrier 5/the cavity 7 is sufficient. The duct 12 or outlet opening 15 is preferably so small in cross section or provided with a bursting element or any other suitable means that the formulation 2 is not discharged, preferably even with opened seals and/or during strong shaking of the dispensing device 1/storage device 4, but preferably only when gas (air) is forced through the insert 6 and atomizing device or duct 12.
The inserts 6 and cavities 7 are preferably adapted to each other such that at least the outlet seal 9a or both seals contact end faces of the inserts 6 and, thus, cover the outlet openings 15. This may (further) prevent that any formulation 2 dissipates through the duct 12/outlet opening 15 before the desired dispensing. In order to increase the sealing or cover effect by seal 9a, the inserts 6 may be slightly longer than the cavities 7 and/or protrude at its outlet side and/or be pressed with its outlet openings 15 against the respective seal 9a or vice versa.
The insert 6 comprises preferably an inlet for supplying preferably pressurized gas into the storage chamber 10 to force the formulation 2 through the atomizing device and to directly generate the described spray 3. In the present embodiment, the inlet is preferably formed by a weak or thinned portion and/or designed as a preferably tube-like recess 16 or blind bore preferably formed in the base member 11. Preferably, the recess 16 is not directly connected to the storage chamber 10, but separated by a seal or an intermediate or thinned wall or the like. This wall can be penetrated e.g., by a connecting element, preferably a piercing element 17 such as a needle as shown schematically in
In the present invention, the expression “piercing element 17” preferably covers also all other suitable types of means for opening and/or connecting the storage device 4, the carrier 5, a cavity 7 and/or an insert 6 and/or for directly or indirectly supplying gas to an insert 6 or its respective storage chamber 10.
The duct 12 is preferably at least tangentially connected to the storage chamber 10 as shown in
The dispensing device 1 uses preferably pressurized gas, in particular air, to force the formulation 2 through the atomizing device or duct 12 to de-agglomerate the powder and/or to generate the spray 3 with fine powder particles. Preferably, the dispensing device 1 comprises a means for providing pressurized gas, in the present embodiment an air pump 18, as indicated in
In particular, the air pump 18 comprises or is formed by a bellows 27 as schematically shown e.g., in
The means for providing pressurized gas/air pump 18 may provide a gas pressure of less than 300 kPa, in particular about 50 to 200 kPa. This is preferably sufficient for operating the dispensing device 1. If liquefied gas or a container with pressurized gas is used, the gas pressures might range from 100 kPa to about 700 kPa. Then, the pressure may be reduced or throttled to the preferred pressure range before supplying the gas to the storage device 4, in particular the storage chamber 10, of the respective insert 6.
Preferably, all pressure values mentioned in the present description are gauge pressures, i.e., pressure differences. All pressure values relate to the pressure in a gas storage, such as a container with pressurized or liquefied gas or provided by air pump 18 or relate to the pressures acting in the chamber 10 and/or in the duct 12.
In particular, in an operation phase, the piercing element 17 penetrates the inner sealing 9b and is inserted into the recess 16 and through the intermediate, end or weakened wall into the storage chamber 10, and thus, connects the respective insert 6 to the gas supply.
The insert 6 may be held by force-fit or by form-fit in the associated cavities 7 or receptacles or in the carrier 5. In the present embodiment, the cavity 7 or carrier 5 comprises a stop 21 against which a front face or shoulder 22 abuts, in particular so that the insert 6 is securely held within the cavity 7 even if the insert 6 is pierced by the piercing element 17.
Before, simultaneously or afterwards, an opening operation takes place. The insert 6, cavity 7 or receptacle and/or outlet seal 9a is opened at the outlet side. The final situation is shown in
The dispensing device 1 preferably comprises an opening device 23 which will be explained with reference to the very schematic view shown in
Preferably, the outlet seal 9a is peeled. Therefore, the opening device 23 is preferably adapted to peel the outlet seal 9a.
In the illustrated embodiment, the peeled outlet seal 9a is wound up. The opening device 23 comprises preferably a wheel 40 for winding up the outlet seal 9a.
The wheel 40 is preferably driven and in particular coupled with the indexing movement or rotation of the storage device 4 or carrier 5. In particular, the wheel 40 is drivingly and/or possibly coupled with the storage device 4, carrier 5 or its drive. In the embodiment according to
It is also possible that the peeling or tension of the outlet seal 9a drives the storage device 4 or carrier 5, i.e., the opening device 23 may form the drive for indexing or rotating the storage device 4, carrier 5 or ring of inserts 6/cavities 7. In particular, the wheel may be driven to rotate.
The opening device 23 comprises preferably at least one guide element 41 which is preferably located adjacent to the outer periphery of the storage device 4 or carrier 5 or annular arrangement of the cavities 7 or receptacles or adjacent to the outlet openings 8a, 15. The guide element 41 allows determined peeling with in particular constant peeling or shearing angle. The guide element 41 may be a loose or driven roll or wheel or an unmovable or an unrotatable member.
The guide element 41 may be moveable in a radial direction or biased against the fixed seal 9a or towards the cavities 7 or openings 8a, 15, e.g., by the tension and guidance of the peeled seal 9a and/or by a spring means or the like.
Consequently, the insert 6 is no longer required to move out of its cavity 7 or receptacle to rupture the outlet seal 9a. Instead, the outlet seal 9a is peeled off the insert ring or opened or removed in any other manner.
It is noted that the guide element 41 is only optional. It is also possible that the wheel 40 directly winds up the outlet seal 9a.
The winding up speed of the wheel 40 and the speed of rotation of the storage device 4, carrier 5 or ring of cavities 7 or inserts 6 are preferably identical such that the newly opened cavity 7 is always at the same rotational position of the ring arrangement so that the outlet direction during dispensing remains the same.
b & 6c explain another embodiment of the opening mechanism or opening device 23. Here, the peeled outlet seal 9a is preferably not wound-up, but drawn away or preferably around the outer periphery of the storage device 4, carrier 5 or ring of receptacles containing the inserts 6.
In this embodiment, the opening device 23 comprises a holding element 42 which is connected with an end of the outlet seal 9a and which is moveable relative to the storage device 4 or carrier 5, in particular along their outer periphery or on a circular path relative to the storage device 4, carrier 5, ring of inserts 6/cavities 7 or fixed outlet seal 9a. Thus, the outlet seal 9a may be peeled by drawing the peeled part away or preferably over the still fixed part of the outlet seal 9a.
b shows more or less the beginning of the peeling where most inserts 6 or cavities 7 are still covered by the outlet seal 9a.
Preferably, the holding element 42 is moveable by a counter rotating part 43 such as a ring or other like, and/or is drivingly connected with the carrier 5, e.g., by means of meshing gears (not shown), in particular such that the part 43 counter-rotates relative to carrier 5.
It is noted that the opening device 23 is responsible for the opening operation. In particular, the cavities 7, inserts 6, atomizing devices or its outlet opening 8a, 15 are individually opened, i.e., for each storage member/insert 6 separately or stepwise. Instead of peeling, the outlet seal 9a can be steered, pierced, removed or opened in any other suitable form than already described. For example, the outlet seal 9a could be removed or peeled only partially, e.g., only a lengthwise part or strip of the seal 9a.
After the connecting operation and opening operation, the dispensing device 1 is activated and ready for dispensing the respective dose of the just opened storage member/insert 6.
For dispensing, the pressurized gas (air) is supplied to the storage chamber 10 via the piercing element 17 or any other suitable connecting or supply element. The gas (air) generates a respective flow in the storage chamber 10 to mix gas and powder and to force the dose through the atomizing device or duct 12.
Preferably, the dispensing device 1 or storage device 4 or means for pressurizing gas comprises a throttle for throttling the gas stream 39. In the present embodiment, the throttle is formed by a restriction and/or the connecting element, i.e., here by the hollow needle or piercing element 17. However, other constructional solutions are possible.
Preferably, the throttle is located stream up, in particular just before, the storage chamber 10. However, it is also possible to form the throttle within the storage chamber 10 or downstream thereof, in particular in or by the duct 12 or the like.
The powder will be discharged—in particular forced through the atomizing device or duct 12—with a comparatively low gas pressure (preferably less than 300 kPa, in particular about 50 to 200 kPa). This low gas pressure, which is significantly lower than the gas pressures in the prior dispensing devices, enables a respectively low discharge velocity and, therefore, a slow spray 3 with slow propagation velocity.
Preferably, the storage chamber 10 forms a mixing chamber for mixing the gas with the powder. The chamber 10 is preferably designed such that the gas can generate swirls or eddies for better mixing the powder with the gas. Preferably, the chamber 10 is substantially circular in cross section, in particular cylindrical. However, other shapes are also possible.
Further, the chamber 10 is formed with no sharp edges, corners or the like, but has a smooth contour so that the gas can sweep all chamber surfaces to prevent powder accumulating on said surfaces and to ensure or allow complete discharge of the powder. In particular, the gas inlet formed by the piercing element 17 or any other supply element is located opposite to the outlet, i.e., duct 12 and/or nozzle, with regard to the axial or outlet direction.
During the dispensing operation, the spray 3 is preferably directly or only generated by the respective insert 6 or its atomizing device or duct 12 and outputted into a mouthpiece 24 of the dispensing device 1 as shown in
After dispensing one dose or before or for dispensing the next dose, the piercing element 17 will be withdrawn from the connected insert 6.
Then, the carrier 5 will be indexed one step further or to the next insert 6, in particular rotated by means of an indexing or transport mechanism (not shown). This mechanism is preferably operated by actuating the actuator 19 or any other means, by opening a cap or cover of the dispensing device 1 or the like, as already mentioned.
It is noted that the present invention, in particular the dispensing device 1 and/or the storage device 4, can be used for dispensing one drug, a blend of drugs or at least two or three separate drugs. In the latter case, the separate drugs are stored in separate storage chambers 10, and during the dispensing operation, the drugs are mixed either in a common mixing chamber or in their respective storage chambers 10 with the gas. Further, the separate drugs can be discharged through a common duct 12 or through separate ducts 12. In the latter case, the separate drugs will be mixed after leaving the separate ducts 12 or in the mouthpiece 24 or in any other suitable (additional) mixing chamber. It is also possible to mix the separate drugs by impinging jets of the separate drugs. For dispensing the separate drugs, it is preferred to use a common gas supply or means for pressurizing gas such as air pump 18.
Preferably, the spray 3 has a mean velocity (taken 20 cm from the outlet 15 or mouthpiece 24) of less than 2 m/s, in particular less than 1 m/s. Preferably, the mean duration of the spray 3 is at least 0.2 or 0.3 s, in particular about 0.5 to 2 s.
In the preferred embodiment according to
Preferably, the mouthpiece 24 and the dispensing direction extend in radial or tangential direction as shown in
Preferably, the dispensing device 1 comprises a lever or handle (not shown) or the actuator 19 or any other driving or actuation means for preferably manual actuation in order to index the carrier 5 one step further, i.e., to the next insert 6, and/or to operate the mechanism 20, preferably to connect the respective insert 6 to the gas supply and/or to operate opening device 40.
It is noted that the dispensing device 1 preferably operates only mechanically.
According to another embodiment (not shown), the inserts 6 may be formed as capsules, blister pockets or the like without any duct 12, or the like. Instead, each insert 6 is connected individually to a gas supply and to a common outlet arrangement, such as a duct 12, nozzle or the like for dispensing the respective dose of the formulation 2.
According to another embodiment, a secondary packaging may be used for packing and protecting the storage device 4/carrier 5, in particular for storage purposes before inserting the storage device 4/carrier 5 into the dispensing device 1. Additionally the whole device 1 including the storage device 4/carrier 5 may be stored in a secondary water vapor proof packaging.
According to another embodiment, the dispensing device 1 may also be a passive inhaler wherein a patient or user (not shown) forces sucks an air flow through the respectively opened insert 6, when breathing in so that this airflow entrains the formulation 2 and forms the desired spray 3 in the mouthpiece 24 for inhalation by the patient/user.
According to a further embodiment, the dispensing devise 1 may be breath activated, in particular wherein the formulation 2 is only released after the patient's or user's inhalation rate has reached a predetermined level, preferably by the use of a pressure sensitive means, such as a bursting element, membrane or valve, or any other mechanism.
It is noted that the term “dispensing device” has to be understood preferably in a broad sense to include other discharge devices, dispensers or the like, preferably wherein the formulation 2 or any other fluid is sprayed or atomized only when needed, in particularly discontinuously.
In the following, a further preferred embodiment of the dispensing device 1 will be explained with reference to
The dispensing device 1 comprises the actuator 19 at one side of housing 26, preferably on the opposite side from the mouthpiece 24 and/or opposite the main spray direction (preferably in a radial direction) of the dispensing device 1. The actuator 19 preferably forms a grip or handle. Therefore, the term “grip” will be used in the following.
The grip 19 is preferably moveable in a radial direction for actuating the dispensing device 1 as explained later in more detail. In particular, the grip 19 can be pulled radially outwardly from the initial position shown in
First of all, the basic principle of the dispensing device 1 will be explained with reference to
The dispensing device 1 is an active atomizer or inhaler, preferably a dry powder inhaler. The means for pressurizing gas is preferably also constructed as air pump 18. Here, the air pump 18 comprises the bellows 27 as pumping element. However, any other suitable pumping element, such as a piston, could be used.
The dispensing device 1/air pump 18 further comprises an energy or spring store, in particular the spring 28, for actuating the pumping element, i.e., the bellows 27. The air pump 18 (bellows 27 and spring 28) is preferably radially moveable, in particular in a sliding manner or like a sled. Preferably, the air pump 18 forms a slider 29 or is supported thereof. In particular, the air pump 18 and slider 29 will be referred to as an “air assembly” in the following.
Preferably, the air assembly forms or includes the mechanism 20 already mentioned with respect to the previous embodiments. For this purpose, the air assembly preferably comprises a needle holder 30 holding the piercing element/needle 17. The piercing element 17 may be pressed and/or glued or molded into the needle holder 30. Preferably, the bellows 27 is pressed or clamped onto the needle holder 30.
The needle holder 30 preferably closes or completes the slider frame 31. For example, the needle holder 30 may comprise holds for pins of the slider frame 31, which pins may be heat-riveted.
The needle holder 30 is connected to or formed by a slider frame 31, which, in turn, holds the spring 28 and/or moveably guides a tension element 32 associated to the bellows 27 and/or spring 28.
In the illustrated embodiment, the bellows 27 is arranged between the needle holder 30 and the tension element 32. The spring 28 is arranged behind the bellows 27, e.g., on the opposite side of the tension element 32.
The tension element 32 holds the bellows 27 in order to secure the filling of the bellows 27 during pulling. Namely, the grip 19 preferably retracts the tension element 32 during pulling.
The air pump 18 or air assembly is preferably located in the center of the dispensing device 1 and/or within the storage device 4 and/or ring-shaped carrier 5 and/or is preferably radially moveable.
When the grip 19 is pushed back, preferably a transportation operation and the opening or peeling operation and a connecting operation will be performed.
In the first phase of the movement of the grip 19, a transport mechanism 33 is actuated. In particular, a cogwheel 34 of the transport mechanism 33 (shown in
Preferably, after termination of the transportation and opening/peeling operation, i.e., during a second phase of pushing, the connecting operation is performed. The air assembly/slider 29 is moved forward and/or radially so that the piercing element 17 connects to the next/aligned insert 6/cavity 7. In particular, the piercing element 17 pierces into the insert 6 to connect to its storage chamber 10.
Before, simultaneously and/or subsequently the transportation operation or connecting operation, the insert 6/duct 12/outlet opening 15 is opened by the opening operation, in particular, peeling the outlet seal 9a. This situation is shown in
Spring 28 is still biased or compressed. This situation is also referred to as the “activated state”. The dispensing device 1 is ready for dispensing the dose of formulation 2 from the opened insert 6.
To initiate delivery (discharge) of the formulation 2 and to generate the spray 3, a release button 36 (shown in
For the next use, the grip 19 is pulled. In a first phase of the movement, the slider 29/air assembly is retracted together with the piercing element 17 so that the piercing element 17 is retracted from the storage device 4, i.e., out of the cavity 7 of the last insert 6. In a second phase of movement, which can also happen simultaneously, but is preferably performed after stop of the slider 29, the tension element 32 is retracted within the slider 29/slider frame 31 so that the bellows 27 is extended and the spring 28 is compressed or biased until the tension element 32 is locked in its retracted position as shown in
It is noted that the release button 36 is preferably lifted only during the last phase of pushing the grip 19. Further, the lifted or activated or primed release button 36 preferably blocks pulling of the grip 19 until the release button 36 has been actuated or depressed, i.e., until the dispensing device 1 has been triggered. In particular, the release button 36 is tilted during actuation or depressing.
In the following, further details, aspects, features and advantages of the present dispensing device 1 and/or of its components will be explained.
Preferably, the storage device 4 comprises multiple receptacles 37 respectively containing only or at least one insert 6, as schematically shown in
The receptacles 37 may be made of the same material as the storage device 4/carrier 5, in particular of plastic. Preferably, the receptacles 37 are rigid and form a guide for the inserts 6. Each of the receptacles 37 comprises only one or more cavities 7 for receiving the respective insert(s) 6.
Preferably, the receptacles 37 are provided with the inserts 6 already filled with the respective dose of formulation 2 and, then, mounted on the comment carrier 5.
The receptacles 37 are preferably sealed by common seals 9a, 9b. The receptacles 37 may be sealed before or after placement on the carrier 5. The receptacles 37 are preferably sealed on opposite sides and/or on longitudinal end faces. Preferably, the receptacle 37 has an essentially cuboid and/or longitudinal form.
The carrier 5 preferably supports the receptacles 37 fixedly and/or in a form-fit manner. Preferably, the receptacles 37 are snapped on to or into the carrier 5.
Preferably, the air assembly/slider 29 and the storage device 4/carrier 5/receptacles 37 interact such that a correct alignment of the piercing element 17 and the respective receptacle 37 or insert 6 is ensured before the piercing element 17 pierces or opens the respective receptacle 37, cavity 7 and/or insert 6.
Preferably, the inserts 6 are restricted in their backward movement as already mentioned so that the piercing element 17 can be retracted and uncoupled from the respective insert in a definitive manner when the air assembly/slider 29 is retracted into the position shown in
In the present embodiment, a locking means is provided for locking the tension element 32 in the retracted position. Here, the locking means comprises at least one snap hook or arm 32a, preferably two or more snap arms 32a engaging into respective undercuts, recesses or snap openings 32b preferably formed by or in a back shield 32c of the slider 29 or slider frame 31 or vice versa. However, other constructional solutions are possible.
The dispensing device 1 is preferably an active powder inhaler, i.e., the powder is discharged by pressurized gas, in particular air. Nevertheless, the dispensing operation may be triggered by the inhalation or breathing in of a patient (not shown). In particular, the dispensing device 1 may comprise detection means for detecting inhalation or breathing in and/or trigger means for triggering dispensing of the respective dose.
In case of the present preferred ring arrangement, the indexing direction extends in the tangential and/or circumferential direction. The term “indexing direction” means preferably the direction in which the storage device 4 is moved, in particular rotated, stepwise from one receptacle 37, cavity 7 or insert 6 to the next one so that the respective doses of formulation 2 can be discharged one after the other.
The wheel 40 is made preferably of two halves 44, 45 or comprises a slit in order to receive and in particular fix or clamp part (preferably, the beginning or free end) of the seal 9a to fix it for winding up the peeled outlet seal 9a. However, other concepts and solutions are possible.
The wheel 40 comprises preferably spring-like arms 46 which are elastic and arranged around the periphery and form the winding surface in particular such that a variable diameter is achieved to compensate any winding diameter required as the seal 9a is wound up and multiple layers of the seal 9a are overlaid on the wheel 40.
In the illustrated embodiment, the guide element 41 of the opening device 23 is constructed to redirect the outlet seal 9a at the point of peeling by an angle of more than 90 degrees, in particular about 120 degrees or more. This facilitates the peeling or reduces forces.
The guide element 41 is preferably supported or held by a flexible holding arm 41 so that the guide element 41 can move at least somewhat in radial direction. However, other constructional solutions are possible as well.
It is noted that the outlet seal 9a is preferably strip-like and preferably forms an outer periphery of the preferably annularly arranged storage members. The outlet seal 9a seals preferably multiple or all outlet openings 8a, 15 or receptacles 37 or cavities 7. The outlet seal 9a is preferably adhered mainly or only to the receptacles 37 or the carrier 5, in particularly not to the storage members/inserts 6.
In particular, the dispensing device 1 is preferably an oral and/or active inhaler, a hand-held device and/or preferably only manually operated. Most preferably, the dispensing device 1 is a dry powder inhaler.
Individual features and aspects of the different embodiments may also be combined with one another as desired or used in other constructions of atomizers, inhalers, dispensers or the like.
Some preferred ingredients and/or compositions of the preferably medicinal formulation 2 are listed below. As already mentioned, they are in particular powders or liquids in the broadest sense. Particularly preferably the formulation 2 contains the following:
The compounds listed below may be used in the device according to the invention on their own or in combination. In the compounds mentioned below, W is a pharmacologically active substance and is selected (for example) from among the betamimetics, anticholinergics, corticosteroids, PDE4-inhibitors, LTD4-antagonists, EGFR-inhibitors, dopamine agonists, H1-antihistamines, PAF-antagonists and PI3-kinase inhibitors. Moreover, double or triple combinations of W may be combined and used in the device according to the invention. Combinations of W might be, for example:
The compounds used as betamimetics are preferably compounds selected from among albuterol, arformoterol, bambuterol, bitolterol, broxaterol, carbuterol, clenbuterol, fenoterol, formoterol, hexoprenaline, ibuterol, isoetharine, isoprenaline, levosalbutamol, mabuterol, meluadrine, metaproterenol, orciprenaline, pirbuterol, procaterol, reproterol, rimiterol, ritodrine, salmefamol, salmeterol, soterenol, sulphonterol, terbutaline, tiaramide, tolubuterol, zinterol, CHF-1035, HOKU-81, KUL-1248 and
The anticholinergics used are preferably compounds selected from among the tiotropium salts, preferably the bromide salt, oxitropium salts, preferably the bromide salt, flutropium salts, preferably the bromide salt, ipratropium salts, preferably the bromide salt, glycopyrronium salts, preferably the bromide salt, trospium salts, preferably the chloride salt, tolterodine. In the above-mentioned salts the cations are the pharmacologically active constituents. As anions the above-mentioned salts may preferably contain the chloride, bromide, iodide, sulphate, phosphate, methanesulphonate, nitrate, maleate, acetate, citrate, fumarate, tartrate, oxalate, succinate, benzoate or p-toluenesulphonate, while chloride, bromide, iodide, sulphate, methanesulphonate or p-toluenesulphonate are preferred as counter-ions. Of all the salts the chlorides, bromides, iodides and methanesulphonates are particularly preferred.
Other preferred anticholinergics are selected from among the salts of formula AC-1
wherein X− denotes an anion with a single negative charge, preferably an anion selected from among the fluoride, chloride, bromide, iodide, sulphate, phosphate, methanesulphonate, nitrate, maleate, acetate, citrate, fumarate, tartrate, oxalate, succinate, benzoate and p-toluenesulphonate, preferably an anion with a single negative charge, particularly preferably an anion selected from among the fluoride, chloride, bromide, methanesulphonate and p-toluenesulphonate, particularly preferably bromide, optionally in the form of the racemates, enantiomers or hydrates thereof. Of particular importance are those pharmaceutical combinations which contain the enantiomers of formula AC-1-en
wherein X− may have the above-mentioned meanings. Other preferred anticholinergics are selected from the salts of formula AC-2
wherein R denotes either methyl or ethyl and wherein X− may have the above-mentioned meanings. In an alternative embodiment the compound of formula AC-2 may also be present in the form of the free base AC-2-base.
Other specified compounds are:
The above-mentioned compounds may also be used as salts within the scope of the present invention, wherein instead of the methobromide the salts metho-X are used, wherein X may have the meanings given hereinbefore for X.
As corticosteroids it is preferable to use compounds selected from among beclomethasone, betamethasone, budesonide, butixocort, ciclesonide, deflazacort, dexamethasone, etiprednol, flunisolide, fluticasone, loteprednol, mometasone, prednisolone, prednisone, rofleponide, triamcinolone, RPR-106541, NS-126, ST-26 and
PDE4-inhibitors which may be used are preferably compounds selected from among enprofyllin, theophyllin, roflumilast, ariflo (cilomilast), tofimilast, pumafentrin, lirimilast, arofyllin, atizoram, D-4418, Bay-198004, BY343, CP-325.366, D-4396 (Sch-351591), AWD-12-281 (GW-842470), NCS-613, CDP-840, D-4418, PD-168787, T-440, T-2585, V-11294A, C1-1018, CDC-801, CDC-3052, D-22888, YM-58997, Z-15370 and
The LTD4-antagonists used are preferably compounds selected from among montelukast, pranlukast, zafirlukast, MCC-847 (ZD-3523), MN-001, MEN-91507 (LM-1507), VUF-5078, VUF-K-8707, L-733321 and
EGFR-inhibitors which may be used are preferably compounds selected from among cetuximab, trastuzumab, ABX-EGF, Mab ICR-62 and
The dopamine agonists used are preferably compounds selected from among bromocriptin, cabergoline, alpha-dihydroergocryptine, lisuride, pergolide, pramipexol, roxindol, ropinirol, talipexol, tergurid and viozan, optionally in the form of the racemates, enantiomers, diastereomers thereof and optionally in the form of the pharmacologically acceptable acid addition salts, solvates or hydrates thereof According to the invention the acid addition salts of the betamimetics are preferably selected from among the hydrochloride, hydrobromide, hydriodide, hydrosulphate, hydrophosphate, hydromethanesulphonate, hydronitrate, hydromaleate, hydroacetate, hydrocitrate, hydrofumarate, hydrotartrate, hydrooxalate, hydrosuccinate, hydrobenzoate and hydro-p-toluenesulphonate.
H1-Antihistamines which may be used are preferably compounds selected from among epinastine, cetirizine, azelastine, fexofenadine, levocabastine, loratadine, mizolastine, ketotifen, emedastine, dimetindene, clemastine, bamipine, cexchlorpheniramine, pheniramine, doxylamine, chlorophenoxamine, dimenhydrinate, diphenhydramine, promethazine, ebastine, desloratidine and meclozine, optionally in the form of the racemates, enantiomers, diastereomers thereof and optionally in the form of the pharmacologically acceptable acid addition salts, solvates or hydrates thereof. According to the invention the acid addition salts of the betamimetics are preferably selected from among the hydrochloride, hydrobromide, hydriodide, hydrosulphate, hydrophosphate, hydromethanesulphonate, hydronitrate, hydromaleate, hydroacetate, hydrocitrate, hydrofumarate, hydrotartrate, hydroxalate, hydrosuccinate, hydrobenzoate and hydro-p-toluenesulphonate.
It is also possible to use inhalable macromolecules, as disclosed in EP 1 003 478 A1 or CA 2297174 A1.
In addition, the compounds may come from the groups of ergot alkaloid derivatives, the triptans, the CGRP-inhibitors, the phosphodiesterase-V inhibitors, optionally in the form of the racemates, enantiomers or diastereomers thereof, optionally in the form of the pharmacologically acceptable acid addition salts, the solvates and/or hydrates thereof.
Examples of ergot alkaloid derivatives are dihydroergotamine and ergotamine.
Number | Date | Country | Kind |
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09003802.7 | Mar 2009 | EP | regional |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2010/001574 | 3/12/2010 | WO | 00 | 10/19/2011 |