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
  • A61M15/0065—Inhalators with dosage or measuring devices
• • 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
  • A61M11/002—Particle size control by flow deviation causing inertial separation of transported particles
• • 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
  • A61M2202/00—Special media to be introduced, removed or treated
  • A61M2202/06—Solids
  • A61M2202/064—Powder

Definitions

• Breath-controlled inhalation device for dry powder and method for evenly distributing the dry powder in air
• the invention relates to a breath-controlled inhalation device for dry powder, in particular dry powder mixed with medication, consisting of a housing with a mouthpiece, a storage chamber for the dry powder located in the housing, and an air guidance unit between a transfer area for the dry powder and the mouthpiece.
• the invention further relates to a method for uniformly distributing the dry powder with a breath-controlled inhalation device.
• a device of this type is known in which the active ingredient is kept ready on the periphery of a metering drum and is radially adjusted.
• the inside of the metering drum contains a control device for actively dispensing the divided inhalation amount from open metering recesses directed radially outwards.
• the bottom of the metering recesses which are distributed at equal angles, are central cam controlled cam. Since this control mechanism is also triggered by an actuating button that almost fully occupies one long side of the device, the effort involved is considerable.
• the dosed drugs can be added by forcibly emptying the dosing recess, which can lead to a dangerous overdosing.
• the volume that remains for the pantry is only a fraction of the volume of the pocket-sized device.
• DE 43 40 768 AI describes a device for inhaling powdery substances, a special vortex chamber being provided in a helical configuration.
• the otherwise complicated construction structure is disadvantageous.
• the swirl chamber enables a certain uniformity in the distribution of the powder.
• the helical winding of the vortex chamber leads to points of friction and resistance, which are a hindrance to the complete passage of the particles.
• the invention is therefore based on the object of To create controlled inhalation device of the type mentioned, which is inexpensive to manufacture with a few individual parts due to a simple structure, has a small size, is equipped with a double dose protection and with which a complete and uniform distribution of the dry powder can be achieved during the inhalation process. Furthermore, a method is to be created which enables a complete and uniform distribution of the dry powder to be inhaled in the breathing air which is suitable for the lungs.
• the object on which the invention is based is achieved in that the storage chamber is coupled to a metering conveyor which plunges into the transfer area in such a way that a predetermined amount of dry powder can be positioned directly at the beginning of the air guidance unit and that the subsequent air guidance unit has a flow channel which alternates with Constrictions and subsequent extensions are provided, the constrictions and the extensions continuously merge and that the flow channel for the air flowing through the air guide unit has a three-dimensional meandering shape.
• the air guiding unit consists of an essentially cylindrical base body, which is alternately provided with indentations similar to spherical caps, which extend from opposite walls of the base body into the air flow channel.
• the air guide unit designed in this way allows a very effective and complete distribution of the dry powder during the inhalation process, since the sucked-in air circulates and the rising particles can be optimally mixed with one another.
• the flow channel has a draw-in area rising in the position of use of the inhalation device and that the metering conveyor can be positioned immediately downstream of the feed area.
• the housing is provided with an air inlet which is arranged downstream of the feed area.
• the opening of the device in the form of the air inlet enables the particles to be sucked in more intensely and independently of residual air.
• a further embodiment provides that the storage chamber is locked in relation to the feed area by the metering conveyor being designed as a flat slide which has a transverse metering hole for receiving the dry powder, the metering hole being located in the storage chamber in the closed state thereof and in the metering position immediately in front of the intake area of the air guiding unit and that the slide essentially keeps the storage chamber closed at all times.
• the metering conveyor being designed as a flat slide which has a transverse metering hole for receiving the dry powder, the metering hole being located in the storage chamber in the closed state thereof and in the metering position immediately in front of the intake area of the air guiding unit and that the slide essentially keeps the storage chamber closed at all times.
• a favorable embodiment provides that the slide is held spring-loaded in an initial position in which the storage chamber is closed and that the slide can be moved into the metering position counter to a spring force.
• a spring-controlled movement mechanism ensures that accidental leakage, unwanted moisture penetration or unintended use operate the device are almost excluded.
• a major advantage of this configuration is that, due to the simplicity of the functional structure, apart from the necessary return spring, only one moving part (dosing conveyor) is required, which in turn guarantees the constant operational readiness of the device and minimizes the risk of any malfunctions.
• the air duct unit can be made in one piece or in several pieces, glass or plastic having proven to be particularly suitable as inexpensive materials. Of course, other suitable materials, such as metals, can also be used for the production of the air guidance unit.
• the object on which the invention is based is further achieved in that the breathing air sucked in as a result of breathing is passed through an air guidance unit in such a way that acceleration and a subsequent braking of the air flow take place with simultaneous swirling and changing the flow direction, the air flow at the beginning of the air a predetermined amount of dry powder is metered in.
• the air circulations and flow guides provided in this special process enable the individual dry powder particles to be swirled effectively. The air movements spread the particles evenly and ensure optimal distribution at the moment of inhalation.
• the acceleration of the air flow is carried out by cross-sectional constrictions in the air guidance unit, which are alternately located on opposite sides in the air guidance unit.
• Fig. La is a front view of an inhalation device according to the invention in the idle state with the mouthpiece open;
• Fig. Lb is a sectional view taken along line A-A of Fig. La;
• FIG. Lc is a sectional view taken along line B-B of Fig. 2b;
• FIG. 1d shows a perspective illustration of the inhalation device according to the invention according to FIGS.
• FIG. 2a shows a front view of an inhalation device according to the invention in the idle state with the mouthpiece closed;
• Fig. 2b is a sectional view taken along line A-A
• Fig. 2c is a sectional view taken along line B-B of Fig. 2b;
• FIGS. 2a-2c shows a perspective view of the inhalation device according to the invention according to FIGS. 2a-2c;
• FIG. 3a shows a front view of an inhalation device according to the invention in the ready-to-inhalation state with the mouthpiece open;
• Fig. 3b is a sectional view taken along line A-A of Fig. 3a;
• Fig. 3c is a sectional view taken along line B-B of Fig. 3b;
• 3d shows a perspective illustration of the inhalation device according to the invention according to FIGS. 3a-3c;
• 4a shows a front view of an inhalation device according to the invention in the ready-to-inhalate state with the mouthpiece closed;
• FIG. 4b is a sectional view along the line AA Fig. 4 a;
• Fig. 4c is a sectional view taken along line B-B of Fig. 4b;
• FIGS. 4a-4c shows a perspective illustration of the inhalation device according to the invention according to FIGS. 4a-4c;
• FIG. 5 shows an exploded view of the individual parts of the breathing-controlled inhalation device according to the invention.
• the storage chamber 4 is both in the unused and in the used state by a metering conveyor 7 designed as a slide 13 (shown separately in FIG. 5) (also shown separately in FIG. 5) ) kept essentially closed at all times. Penetration of external moisture or contaminants can thus be virtually ruled out with regard to the dry powder in the storage chamber.
• the metering conveyor 7 has a transverse metering hole 14 (shown in FIG. 1b) for receiving the dry powder. Before the inhalation process begins, the metering bore 14 is in the storage chamber 4. A cap 16 (shown separately in FIG. 5) protects the mouthpiece 3 hygienically. After the cap 16 has been removed (FIGS. 1 a and b), the inhalation device 1 is held vertically with the mouthpiece 3 away from the mouth. After the user has first exhaled deeply while avoiding contact with the mouthpiece - ie without blowing into the mouthpiece 3 - he then encloses the mouthpiece 3 with his lips.
• the remaining dry powder in the metering bore 14 is reclaimed in the storage chamber 4 by the spring moving the metering device into the starting position, or falls out of the feed area and is therefore no longer available in a further inhalation process , In this way the risk of double dosing is avoided.
• the breathing air sucked in as a result of the breathing is guided through the air guidance unit - shown separately in FIG. 5 - in such a way that the air flow is alternately accelerated and subsequently braked with simultaneous swirling and changing the direction of flow.
• the air guide unit 5 consists of a substantially cylindrical base body 9, which is alternately provided with indentations 10 similar to spherical caps, which extend from opposite walls of the base body 9 into the flow channel 8 of the air.
• the air guiding unit 5 can be made in one piece or in several pieces, glass or plastic having proven to be particularly suitable as inexpensive materials. Of course, other suitable materials, for example metals, can also be used for the production of the air guidance unit.
• the acceleration of the air flow is carried out by cross-sectional constrictions in the air guide unit 5, which are alternately located on opposite sides in the air guide unit 5.
• the air guiding unit 5 designed in this way allows a very effective and complete distribution of the dry powder during the inhalation process, since the sucked-in air circulates and the ascending particles can be optimally mixed with one another.
• Breath-controlled inhalation device for dry powder and method for evenly distributing the dry powder in air

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• Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Public Health (AREA)
• Animal Behavior & Ethology (AREA)
• Veterinary Medicine (AREA)
• Anesthesiology (AREA)
• Biomedical Technology (AREA)
• Heart & Thoracic Surgery (AREA)
• Hematology (AREA)
• General Health & Medical Sciences (AREA)
• Bioinformatics & Cheminformatics (AREA)
• Biophysics (AREA)
• Pulmonology (AREA)
• Medicinal Preparation (AREA)
• Respiratory Apparatuses And Protective Means (AREA)
• Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Priority Applications (9)

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Cited By (2)

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Citations (7)

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• 2000
  • 2000-10-06 PT PT00982968T patent/PT1220700E/pt unknown
  • 2000-10-06 EP EP00982968A patent/EP1220700B1/de not_active Expired - Lifetime
  • 2000-10-06 DK DK00982968T patent/DK1220700T3/da active
  • 2000-10-06 CA CA002390111A patent/CA2390111C/en not_active Expired - Fee Related
  • 2000-10-06 AT AT00982968T patent/ATE236676T1/de not_active IP Right Cessation
  • 2000-10-06 AU AU19928/01A patent/AU774573B2/en not_active Ceased
  • 2000-10-06 JP JP2001527856A patent/JP2003511107A/ja active Pending
  • 2000-10-06 HK HK03100269.1A patent/HK1049452B/zh not_active IP Right Cessation
  • 2000-10-06 ES ES00982968T patent/ES2195948T3/es not_active Expired - Lifetime
  • 2000-10-06 CN CNB008139032A patent/CN1157236C/zh not_active Expired - Fee Related
  • 2000-10-06 WO PCT/DE2000/003527 patent/WO2001024857A1/de not_active Ceased
• 2002
  • 2002-04-04 US US10/117,762 patent/US6729328B2/en not_active Expired - Fee Related

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