CA2105315C - Nebulizer - Google Patents
NebulizerInfo
- Publication number
- CA2105315C CA2105315C CA002105315A CA2105315A CA2105315C CA 2105315 C CA2105315 C CA 2105315C CA 002105315 A CA002105315 A CA 002105315A CA 2105315 A CA2105315 A CA 2105315A CA 2105315 C CA2105315 C CA 2105315C
- Authority
- CA
- Canada
- Prior art keywords
- housing
- chimney
- droplets
- extending
- nebulizer
- 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.)
- Expired - Fee Related
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
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
- A61M11/06—Sprayers or atomisers specially adapted for therapeutic purposes of the injector type
-
- 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
-
- 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
- A61M15/00—Inhalators
- A61M15/0001—Details of inhalators; Constructional features thereof
- A61M15/0013—Details of inhalators; Constructional features thereof with inhalation check valves
- A61M15/0016—Details of inhalators; Constructional features thereof with inhalation check valves located downstream of the dispenser, i.e. traversed by the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/0012—Apparatus for achieving spraying before discharge from the apparatus
Abstract
A nebulizer which includes a housing having a vertical axis, an open bottom, an air inlet tube extending into the housing and an outlet tube extending from the housing. A bottom cup is removably attached to the open bottom for storing liquid medication, the bottom cup having an opening therethrough. Pressurized air is supplied through the bottom cup opening into the housing and a capillary tube extends from the cup to the air supply so that liquid medication will be drawn up through the capillary tube to form droplets. An axial cylindrical chimney is receivable inside the housing, the chimney having an annular flange extending perpendicularly from the chimney, the flange capable of resting against the housing. The chimney includes a removable check valve at the top thereof. A horizontal target extends across the cylindrical chimney, whereby the air supply and liquid droplets will impinge on the horizontal target and impinge on the check valve, the droplets being broken into micron size droplets for delivery to a patient.
Description
- /- 2~05~15 NEB~LIZER
BACKGROUND OF THE INVENTION
1. Field of the Invention.
The present invention relates to a breathing device for administering a liquid medicant to a patient.
BACKGROUND OF THE INVENTION
1. Field of the Invention.
The present invention relates to a breathing device for administering a liquid medicant to a patient.
2. Prior Art.
Nebulizers or atomizers used with intermittent positive pressure breathing (IPPB) equipment or with the patient's own natural breathing effort have been proven effective as a delivery system for liquid medicant.
A problem with many previous nebulizers is the size and distribution of liquid particles that are produced. Large droplets of medication are trapped on the walls of the mouth or throat, and as such, never pass into the lungs. For the liquid medication to reach the smaller passages in the bronchial tubes and lungs, the size of the liquid particles must be below 5 microns. At one time, an average particle size under 5 microns was acceptable.
Increasingly, however, an even smaller average particle size is being called for by the medical community with certain medications and for certain treatments. Additionally, the actual particle count delivered is of great importance.
A further problem associated with many nebulizers is that they are not directly responsive to the increase or decrease in the patient's breathing. When a patient inhales, he or she is typically inhaling at a rate from 15 to 50 liters per minute. The output of most nebulizers drops off dramatically when a patient 2los3l5 nhales at a rate exceeding 20 liters per minute.
In the present invention, all of the air inhaled by the patient is directed past the saturated mist. As the air flow to the patient's lungs is increased, additional liquid particles are delivered to the lungs. Conversely, when the air flow to the patient's lungs is decreased, the number of liquid particles is decreased. Thus, the amount of saturated air delivered to the patient is directly responsive to the increase or decrease in the patient's breathing.
Applicant is aware of a number of prior art patents including Glenn (U.S. Patent No. 4,007,238) and Lester (U.S. Patent No.
4,512,341).
The Lester nebulizer is connected to a breathing apparatus to allow entry of atmospheric air. The nebulizer is connected to a "T" in the air supply line. As the patient breathes in, additional atmospheric air is drawn into the lungs. The amount of saturated air, however, does not change in response to the patient's breathing.
Applicant's prior patent (U.S. Patent No. 4,007,238) solved the problem and provides responsiveness to the patient's breathing.
A significant number of improvements, however, has been made and are included in the present invention.
An additional baffle system has been provided in the present invention which serves to further reduce the average particle size delivered. The baffling may be added as an option to the nebulizer and may be removed, if desired. The additional baffle system may 2~5~15 take a number of configurations and is interchangeable depending on the particular medication and treatment prescribed.
Additionally, the present invention has a design which more evenly distributes the atmospheric air which passes through the chimney and mixes with the saturated mist. The ability to provide a thoroughly saturated mist is, thus, enhanced.
It is a principal object and purpose of this invention to provide a nebulizer which, with a supply of pressurized air, will produce a fine mist of liquid droplets of extremely small size.
10It is further object and purpose of the present invention to provide a nebulizer with a removable baffling system to vary the size of liquid particles.
SUMMARY OF THE INVENTION
The nebulizer of the present invention includes an outer lScylindrical housing having a longitudinal axis vertically arranged.
The housing has a closed top and an open bottom.
An atmospheric air inlet extends through a side wall of the cylindrical housing. An outlet tube extends from an opening in the cylindrical housing substantially opposite of the inlet tube.
20The lower portion of the housing has a slightly larger diameter than the upper portion of the housing. The lower portion and the upper portion are connected together by a sloping shoulder.
Concentrically received within the housing is a chimney open at both ends. The chimney has an extending annular flange which 25rests against the sloping shoulder. The open bottom of the housing ~05315 lS closed by a medication cup removably attached.
An opening through the bottom of the cup contains a tube which terminates interior to the nebulizer at an orifice located above the upper level of the liquid medication.
Mounted near and above the orifice is a capillary housing including a capillary tube extending from a point near the orifice downward into the liquid medication. During operation, a stream of pressurized air flowing through the orifice causes induction of liquid medication from the cup through the capillary tube where the liquid droplets are moved at high velocity into the chimney and strike a cylindrical target extending horizontally across the cylindrical chimney.
Atmospheric air entering the nebulizer travels downward toward the lower opening of the chimney. Additionally, atmospheric air lS from the air inlet passes through an opening in the horizontal target extending across the chimney. Atmospheric air which exits the horizontal target also travels downward toward the bottom opening of the chimney.
An additional, removable baffle is provided at the top of the chimney. A valve holder has a somewhat flexible body that may be force fit into the top opening of the chimney or may be fabricated as a part of the chimney.
The valve holder has an upwardly extending post upon which may be placed a flexible membrane acting as a one-way check valve to allow the mist to exit from the chimney into the housing.
The fine mist of liquid particles which exits from the chimney ~i 05315 into the housing and will then pass into outlet tube, and then to the patient. Any larger liquid droplets which fall out will descend to the annular flange, which is provided with an opening.
The liquid droplets will, thereby, return to the medication cup.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a cross-sectional view of a nebulizer constructed in accordance with the present invention;
Figure 2 is a sectional view taken along line 2-2 of the nebulizer as shown in Figure 1;
Figure 3 is a sectional view of one embodiment of a chimney utilized as part of the nebulizer shown in Figure 1;
Figure 4 is an alternate embodiment of a chimney to be utilized with a nebulizer as shown in Figure 1-; and Figure 5 is a view corresponding to that of Figure 1 of an alternate embodiment of nebulizer.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings in detail, Figure 1 illustrates a cross-sectional view of a nebulizer 10 constructed in accordance with the present invention.
The nebulizer 10 includes an outer cylindrical housing 14 which is normally positioned upright with its longitudinal axis vertically arranged. While the present embodiment has a cylindrical housing, it will be understood that other forms might also be utilized. The cylindrical housing 14 has a closed top 16 and an open bottom 18.
An atmospheric air inlet 20 extends through a sidewall of the ~ylindrical housing 14. Arrow^s 22 show the direction of atmospheric air which is allowed to pass through the inlet tube and into the housing 14. An outlet tube 24 extends from an opening in the cylindrical housing. The outlet tube 24 is substantially S opposite the inlet tube 20; other configurations, however, are possible. For instance, the outlet 24 may extend upward vertically from the housing 14. A removable mouthpiece 26 may extend from the outlet tube 24.
The lower portion of housing 14 has a slightly larger diameter than the upper portion of the cylindrical housing. Where the lower portion meets the upper portion, the housing narrows to form a sloping shoulder 28.
Concentrically positioned and received within the housing 14 is a cylindrical chimney 30 which is open at both ends - the top end 31 and bottom end 32. The chimney has an extending annular flange 33 which extends perpendicularly from the exterior of the cylindrical wall of the chimney. When installed, the chimney is inserted in the open bottom 18 and the annular flange rests against the inside cylindrical wall of the housing 14 at sloping shoulder 28. The annular flange fits snugly against the lower portion. As will be observed, the chimney 30 is removable from the housing and may be of different configurations.
With the chimney so installed, an annulus is formed between the housing and the chimney.
The open bottom of the housing 14 is closed by a medication cup 34 which is removably attached to the housing, in this case by means of threads 35. The cup is closed at the bottom for storing a dosage of liquid medication 36 therein. When the bottom cup is attached, a closed chamber is formed with the exception of the inlet tube 20 and the outlet tube 24.
An opening 38 through the bottom of the cup 34 contains a vertical tube 40 which extends through the cup. The tube 40 terminates interior to the nebulizer 10 at an orifice 42 located above the upper lever of the liquid medication 36. During operation of the nebulizer, a stream of pressurized air is provided through the tube 40 and orifice 42 and into the closed chamber of the nebulizer formed by the housing 14 and cup 34.
Mounted near and above the orifice 42 is a capillary housing 44. The capillary housing includes a capillary tube 46 extending from a point near the orifice 42 downward into the liquid medication 36. During operation, the stream of pressurized air indicated by arrow 48 flowing through the orifice 42 will cause induction of liquid medication from the cup 34 through the capillary tube 46 where the liquid droplets will be moved at high velocity into the housing 14.
It will be recognized that other capillary mechanisms might be used to draw liquid up to the stream of pressurized air.
The open bottom 32 of the chimney 30 is located above the pressurized air orifice 42 and capillary housing 44. Accordingly, the liquid droplets and pressurized air will move at high velocity into the chimney. A cylindrical target 49 extends horizontally across the cylindrical chimney.
During operation of the nebulizer 10, intermittent air flow is created by the patient's breathing. Atmospheric air enters the nebulizer through air inlet 20 as seen by arrows 22. The atmospheric air will travel in two directions once inside the housing. It will travel downward and toward the lower opening of the chimney as seen by arrow S0. Additionally, atmospheric air will pass through an opening 51 in the horizontal target extending across the chimney as seen by arrows 52. Air which exits the horizontal target will then travel downward toward the bottom opening 32 of the cylindrical chimney. By use of the opening in the horizontal target, atmospheric air is more evenly distributed in the housing. The air flow will then be directed upward through the interior of the chimney.
The horizontal target and opening 51 therethrough may be observed in the sectional view seen in Figure 2.
The stream of pressurized air exiting from the orifice 42 and liquid droplets from the capillary tube will, thus, be caused to impinge against horizontal target 49.
It will be observed that the fine mist being produced by the capillary orifice and horizontal target is mixed and swept along with the atmospheric air. ~his mixture of air and mist then passes upward into the upper portion of the chimney.
An additional, removable baffle mechanism is provided at the top 31 of chimney 30. A valve holder 56 has a somewhat flexible body that may be force fit ;nto the top opening 31. The valve holder might alternatively be fabricated as a part of the chimney ~lOS31~
30. The valve holder may have a number of cross baffles, as best seen in the cross-sectioned view in Figure 3.
The valve holder has an upwardly extending post 58 upon which may be placed a flexible membrane 60. The membrane acts as a one-way check valve to allow the mist to exit from the chimney into the housing 14. As the patient inhales, the valve membrane lifts to allow the mist to pass from the chimney. The use of the valve holder and membrane 60 acts as a secondary baffling system and restricts some of the larger particles from passing to the outlet tube 24.
It has been found that by use of the additional baffle mechanism, namely the valve holder and check valve, the average particle size is reduced significantly. The average particle size may, thus, be controlled by installation and removal of the membrane and valve holder as dictated by the particular medication and treatment prescribed.
Tests by an independent laboratory support the applicant's claim to a dramatic decrease in average particle size by use of a secondary baffling system.
By placing this additional baffle mechanism in the chimney, larger droplets will be knocked out and will descend, returning to the medication cup.
Figure 4 illustrates an alternate embodiment of a cylindrical chimney 64 for use in the housing 14. The chimney 64 is open at the bottom 66. A top 68 extends horizontally across the chimney 64 with a pair of openings 70 in the cylindrical chimney.
The top 68 of the chimney 64^ acts as an additional target against which the liquid particles will impinge. Accordingly, the larger size particles will fall out and be prevented from passing to the outlet tube 24.
S The chimney 64, likewise, has an annular flange 72 extending therefrom which will rest against the sloping shoulder 28. The chimney 64 would also include a horizontal target 74 extending across the cylindrical chimney 64.
It will be appreciated that chimney 64 is interchangeable with chimney 30. Accordingly, not only may the chimney 30 be used with or without the valve holder 56 and membrane 60, but the chimney 30 may be replaced with chimney 64.
Returning to a consideration of Figure 1, the fine mist of liquid particles which exits from the chimney 30 into the housing lS will pass into outlet tube 24 and then to the patient (not shown).
~ ~3 Any larger droplets~which condense and fall out will descend to the flange 33, which is provided with a drain opening 76. The droplets will thereby return to the medication cup.
Figure 5 illustrates an alternate embodiment 80 of the nebulizer having a modified capillary housing 82 and capillary tube 84 and having a modified chimney 86.
As in the other embodiment, the cylindrical housing 14 has a closed top 16 and an open bottom 18. Atmospheric air inlet 20 extends through a sidewall of the cylindrical housing 14. An outlet tube 24 extends from an opening in the cylindrical housing 14 substantially opposite the inlet tube.
The chimney 86 is inserted in the open bottom 18 and an annular flange 88 extending from the chimney rests against the inside wall of the housing.
The open bottom of the housing 14 is closed by a medication S cup 34.
With a single capillary tube 46, as seen in Figure 1, the medication cup 34 could be tipped at an angle and a portion of the medication would remain in the cup 34 and not be drawn into the tube. A salient advantage may be observed from the design of the capillary housing 82. In the present embodiment, the capillary housing 82 has a cylindrical lower end 90 which terminates near the bottom of the medication cup 34. Accordingly, no matter what direction the housing 14 is tipped, medication will be drawn in the capillary housing 82. While this feature is achieved in other nebulizers through use of a coaxial jet, the present embodiment retains use of a capillary tube 84 which is more efficient than a coaxial jet since it can be operated at lower pressurized air rates.
The capillary tube 84 is in fluid communication with the capillary housing 82 so that medication is drawn therein. The capillary tube extends up to the orifice 42 of the tube 40. During operation, the stream of pressurized air flowing through the orifice 42 will cause induction of liquid medication from the medication cup 34, through the capillary housing 82 and through the capillary tube 84 where the liquid droplets will be moved at high velocity into the housing 14.
2105~15 A cylindrical target 92 extends from the capillary housing 82 and is located above the orifice 42. The stream of pressurized air exiting from the orifice 42 and the liquid droplets from the capillary tube 84 will, thus, be caused to impinge against horizontal target 92.
It will be observed that the horizontal target 92 of the present embodiment 80 is not attached to the chimney 86 but extends from the capillary housing 82.
Any of the previously described secondary baffle mechanisms might be employed.
Whereas, the present invention has been described in relation to the drawings attached hereto, it should be understood that other and further modifications, apart from those shown or suggested herein, may be made within the spirit and scope of this invention.
Nebulizers or atomizers used with intermittent positive pressure breathing (IPPB) equipment or with the patient's own natural breathing effort have been proven effective as a delivery system for liquid medicant.
A problem with many previous nebulizers is the size and distribution of liquid particles that are produced. Large droplets of medication are trapped on the walls of the mouth or throat, and as such, never pass into the lungs. For the liquid medication to reach the smaller passages in the bronchial tubes and lungs, the size of the liquid particles must be below 5 microns. At one time, an average particle size under 5 microns was acceptable.
Increasingly, however, an even smaller average particle size is being called for by the medical community with certain medications and for certain treatments. Additionally, the actual particle count delivered is of great importance.
A further problem associated with many nebulizers is that they are not directly responsive to the increase or decrease in the patient's breathing. When a patient inhales, he or she is typically inhaling at a rate from 15 to 50 liters per minute. The output of most nebulizers drops off dramatically when a patient 2los3l5 nhales at a rate exceeding 20 liters per minute.
In the present invention, all of the air inhaled by the patient is directed past the saturated mist. As the air flow to the patient's lungs is increased, additional liquid particles are delivered to the lungs. Conversely, when the air flow to the patient's lungs is decreased, the number of liquid particles is decreased. Thus, the amount of saturated air delivered to the patient is directly responsive to the increase or decrease in the patient's breathing.
Applicant is aware of a number of prior art patents including Glenn (U.S. Patent No. 4,007,238) and Lester (U.S. Patent No.
4,512,341).
The Lester nebulizer is connected to a breathing apparatus to allow entry of atmospheric air. The nebulizer is connected to a "T" in the air supply line. As the patient breathes in, additional atmospheric air is drawn into the lungs. The amount of saturated air, however, does not change in response to the patient's breathing.
Applicant's prior patent (U.S. Patent No. 4,007,238) solved the problem and provides responsiveness to the patient's breathing.
A significant number of improvements, however, has been made and are included in the present invention.
An additional baffle system has been provided in the present invention which serves to further reduce the average particle size delivered. The baffling may be added as an option to the nebulizer and may be removed, if desired. The additional baffle system may 2~5~15 take a number of configurations and is interchangeable depending on the particular medication and treatment prescribed.
Additionally, the present invention has a design which more evenly distributes the atmospheric air which passes through the chimney and mixes with the saturated mist. The ability to provide a thoroughly saturated mist is, thus, enhanced.
It is a principal object and purpose of this invention to provide a nebulizer which, with a supply of pressurized air, will produce a fine mist of liquid droplets of extremely small size.
10It is further object and purpose of the present invention to provide a nebulizer with a removable baffling system to vary the size of liquid particles.
SUMMARY OF THE INVENTION
The nebulizer of the present invention includes an outer lScylindrical housing having a longitudinal axis vertically arranged.
The housing has a closed top and an open bottom.
An atmospheric air inlet extends through a side wall of the cylindrical housing. An outlet tube extends from an opening in the cylindrical housing substantially opposite of the inlet tube.
20The lower portion of the housing has a slightly larger diameter than the upper portion of the housing. The lower portion and the upper portion are connected together by a sloping shoulder.
Concentrically received within the housing is a chimney open at both ends. The chimney has an extending annular flange which 25rests against the sloping shoulder. The open bottom of the housing ~05315 lS closed by a medication cup removably attached.
An opening through the bottom of the cup contains a tube which terminates interior to the nebulizer at an orifice located above the upper level of the liquid medication.
Mounted near and above the orifice is a capillary housing including a capillary tube extending from a point near the orifice downward into the liquid medication. During operation, a stream of pressurized air flowing through the orifice causes induction of liquid medication from the cup through the capillary tube where the liquid droplets are moved at high velocity into the chimney and strike a cylindrical target extending horizontally across the cylindrical chimney.
Atmospheric air entering the nebulizer travels downward toward the lower opening of the chimney. Additionally, atmospheric air lS from the air inlet passes through an opening in the horizontal target extending across the chimney. Atmospheric air which exits the horizontal target also travels downward toward the bottom opening of the chimney.
An additional, removable baffle is provided at the top of the chimney. A valve holder has a somewhat flexible body that may be force fit into the top opening of the chimney or may be fabricated as a part of the chimney.
The valve holder has an upwardly extending post upon which may be placed a flexible membrane acting as a one-way check valve to allow the mist to exit from the chimney into the housing.
The fine mist of liquid particles which exits from the chimney ~i 05315 into the housing and will then pass into outlet tube, and then to the patient. Any larger liquid droplets which fall out will descend to the annular flange, which is provided with an opening.
The liquid droplets will, thereby, return to the medication cup.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a cross-sectional view of a nebulizer constructed in accordance with the present invention;
Figure 2 is a sectional view taken along line 2-2 of the nebulizer as shown in Figure 1;
Figure 3 is a sectional view of one embodiment of a chimney utilized as part of the nebulizer shown in Figure 1;
Figure 4 is an alternate embodiment of a chimney to be utilized with a nebulizer as shown in Figure 1-; and Figure 5 is a view corresponding to that of Figure 1 of an alternate embodiment of nebulizer.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings in detail, Figure 1 illustrates a cross-sectional view of a nebulizer 10 constructed in accordance with the present invention.
The nebulizer 10 includes an outer cylindrical housing 14 which is normally positioned upright with its longitudinal axis vertically arranged. While the present embodiment has a cylindrical housing, it will be understood that other forms might also be utilized. The cylindrical housing 14 has a closed top 16 and an open bottom 18.
An atmospheric air inlet 20 extends through a sidewall of the ~ylindrical housing 14. Arrow^s 22 show the direction of atmospheric air which is allowed to pass through the inlet tube and into the housing 14. An outlet tube 24 extends from an opening in the cylindrical housing. The outlet tube 24 is substantially S opposite the inlet tube 20; other configurations, however, are possible. For instance, the outlet 24 may extend upward vertically from the housing 14. A removable mouthpiece 26 may extend from the outlet tube 24.
The lower portion of housing 14 has a slightly larger diameter than the upper portion of the cylindrical housing. Where the lower portion meets the upper portion, the housing narrows to form a sloping shoulder 28.
Concentrically positioned and received within the housing 14 is a cylindrical chimney 30 which is open at both ends - the top end 31 and bottom end 32. The chimney has an extending annular flange 33 which extends perpendicularly from the exterior of the cylindrical wall of the chimney. When installed, the chimney is inserted in the open bottom 18 and the annular flange rests against the inside cylindrical wall of the housing 14 at sloping shoulder 28. The annular flange fits snugly against the lower portion. As will be observed, the chimney 30 is removable from the housing and may be of different configurations.
With the chimney so installed, an annulus is formed between the housing and the chimney.
The open bottom of the housing 14 is closed by a medication cup 34 which is removably attached to the housing, in this case by means of threads 35. The cup is closed at the bottom for storing a dosage of liquid medication 36 therein. When the bottom cup is attached, a closed chamber is formed with the exception of the inlet tube 20 and the outlet tube 24.
An opening 38 through the bottom of the cup 34 contains a vertical tube 40 which extends through the cup. The tube 40 terminates interior to the nebulizer 10 at an orifice 42 located above the upper lever of the liquid medication 36. During operation of the nebulizer, a stream of pressurized air is provided through the tube 40 and orifice 42 and into the closed chamber of the nebulizer formed by the housing 14 and cup 34.
Mounted near and above the orifice 42 is a capillary housing 44. The capillary housing includes a capillary tube 46 extending from a point near the orifice 42 downward into the liquid medication 36. During operation, the stream of pressurized air indicated by arrow 48 flowing through the orifice 42 will cause induction of liquid medication from the cup 34 through the capillary tube 46 where the liquid droplets will be moved at high velocity into the housing 14.
It will be recognized that other capillary mechanisms might be used to draw liquid up to the stream of pressurized air.
The open bottom 32 of the chimney 30 is located above the pressurized air orifice 42 and capillary housing 44. Accordingly, the liquid droplets and pressurized air will move at high velocity into the chimney. A cylindrical target 49 extends horizontally across the cylindrical chimney.
During operation of the nebulizer 10, intermittent air flow is created by the patient's breathing. Atmospheric air enters the nebulizer through air inlet 20 as seen by arrows 22. The atmospheric air will travel in two directions once inside the housing. It will travel downward and toward the lower opening of the chimney as seen by arrow S0. Additionally, atmospheric air will pass through an opening 51 in the horizontal target extending across the chimney as seen by arrows 52. Air which exits the horizontal target will then travel downward toward the bottom opening 32 of the cylindrical chimney. By use of the opening in the horizontal target, atmospheric air is more evenly distributed in the housing. The air flow will then be directed upward through the interior of the chimney.
The horizontal target and opening 51 therethrough may be observed in the sectional view seen in Figure 2.
The stream of pressurized air exiting from the orifice 42 and liquid droplets from the capillary tube will, thus, be caused to impinge against horizontal target 49.
It will be observed that the fine mist being produced by the capillary orifice and horizontal target is mixed and swept along with the atmospheric air. ~his mixture of air and mist then passes upward into the upper portion of the chimney.
An additional, removable baffle mechanism is provided at the top 31 of chimney 30. A valve holder 56 has a somewhat flexible body that may be force fit ;nto the top opening 31. The valve holder might alternatively be fabricated as a part of the chimney ~lOS31~
30. The valve holder may have a number of cross baffles, as best seen in the cross-sectioned view in Figure 3.
The valve holder has an upwardly extending post 58 upon which may be placed a flexible membrane 60. The membrane acts as a one-way check valve to allow the mist to exit from the chimney into the housing 14. As the patient inhales, the valve membrane lifts to allow the mist to pass from the chimney. The use of the valve holder and membrane 60 acts as a secondary baffling system and restricts some of the larger particles from passing to the outlet tube 24.
It has been found that by use of the additional baffle mechanism, namely the valve holder and check valve, the average particle size is reduced significantly. The average particle size may, thus, be controlled by installation and removal of the membrane and valve holder as dictated by the particular medication and treatment prescribed.
Tests by an independent laboratory support the applicant's claim to a dramatic decrease in average particle size by use of a secondary baffling system.
By placing this additional baffle mechanism in the chimney, larger droplets will be knocked out and will descend, returning to the medication cup.
Figure 4 illustrates an alternate embodiment of a cylindrical chimney 64 for use in the housing 14. The chimney 64 is open at the bottom 66. A top 68 extends horizontally across the chimney 64 with a pair of openings 70 in the cylindrical chimney.
The top 68 of the chimney 64^ acts as an additional target against which the liquid particles will impinge. Accordingly, the larger size particles will fall out and be prevented from passing to the outlet tube 24.
S The chimney 64, likewise, has an annular flange 72 extending therefrom which will rest against the sloping shoulder 28. The chimney 64 would also include a horizontal target 74 extending across the cylindrical chimney 64.
It will be appreciated that chimney 64 is interchangeable with chimney 30. Accordingly, not only may the chimney 30 be used with or without the valve holder 56 and membrane 60, but the chimney 30 may be replaced with chimney 64.
Returning to a consideration of Figure 1, the fine mist of liquid particles which exits from the chimney 30 into the housing lS will pass into outlet tube 24 and then to the patient (not shown).
~ ~3 Any larger droplets~which condense and fall out will descend to the flange 33, which is provided with a drain opening 76. The droplets will thereby return to the medication cup.
Figure 5 illustrates an alternate embodiment 80 of the nebulizer having a modified capillary housing 82 and capillary tube 84 and having a modified chimney 86.
As in the other embodiment, the cylindrical housing 14 has a closed top 16 and an open bottom 18. Atmospheric air inlet 20 extends through a sidewall of the cylindrical housing 14. An outlet tube 24 extends from an opening in the cylindrical housing 14 substantially opposite the inlet tube.
The chimney 86 is inserted in the open bottom 18 and an annular flange 88 extending from the chimney rests against the inside wall of the housing.
The open bottom of the housing 14 is closed by a medication S cup 34.
With a single capillary tube 46, as seen in Figure 1, the medication cup 34 could be tipped at an angle and a portion of the medication would remain in the cup 34 and not be drawn into the tube. A salient advantage may be observed from the design of the capillary housing 82. In the present embodiment, the capillary housing 82 has a cylindrical lower end 90 which terminates near the bottom of the medication cup 34. Accordingly, no matter what direction the housing 14 is tipped, medication will be drawn in the capillary housing 82. While this feature is achieved in other nebulizers through use of a coaxial jet, the present embodiment retains use of a capillary tube 84 which is more efficient than a coaxial jet since it can be operated at lower pressurized air rates.
The capillary tube 84 is in fluid communication with the capillary housing 82 so that medication is drawn therein. The capillary tube extends up to the orifice 42 of the tube 40. During operation, the stream of pressurized air flowing through the orifice 42 will cause induction of liquid medication from the medication cup 34, through the capillary housing 82 and through the capillary tube 84 where the liquid droplets will be moved at high velocity into the housing 14.
2105~15 A cylindrical target 92 extends from the capillary housing 82 and is located above the orifice 42. The stream of pressurized air exiting from the orifice 42 and the liquid droplets from the capillary tube 84 will, thus, be caused to impinge against horizontal target 92.
It will be observed that the horizontal target 92 of the present embodiment 80 is not attached to the chimney 86 but extends from the capillary housing 82.
Any of the previously described secondary baffle mechanisms might be employed.
Whereas, the present invention has been described in relation to the drawings attached hereto, it should be understood that other and further modifications, apart from those shown or suggested herein, may be made within the spirit and scope of this invention.
Claims (8)
1. A nebulizer which comprises:
a. a housing having a vertical axis, said housing having an open bottom, an air inlet tube extending into said housing, and an outlet tube extending from said housing;
b. a bottom cup removably attached to said open bottom for storing liquid medication therein, said bottom cup having an opening therethrough;
c. means to supply air under pressure through said bottom cup opening into said housing;
d. capillary tube means extending from said bottom cup to said air supply means so that said liquid medication will be drawn up through said capillary tube means to form droplets;
e. an axial cylindrical chimney inside said housing having an annular flange extending from said chimney, said flange resting against said housing, said chimney having removable check valve means at the top thereof, said flange having at least one drain opening permitting communication between fluid exiting said check valve and said cup;
f. horizontal target means perpendicular to said chimney axis for impingement of said air supply and said liquid droplets on said horizontal target means and on said check valve means, said droplets being broken into smaller micron size droplets by the impingement for delivery to a patient; and g. means for removing remaining larger liquid droplets exiting from said check valve means by force of gravity, said larger droplets passing through said at least one drain opening in said chimney flange and back to said bottom cup at all times exterior to said chimney.
a. a housing having a vertical axis, said housing having an open bottom, an air inlet tube extending into said housing, and an outlet tube extending from said housing;
b. a bottom cup removably attached to said open bottom for storing liquid medication therein, said bottom cup having an opening therethrough;
c. means to supply air under pressure through said bottom cup opening into said housing;
d. capillary tube means extending from said bottom cup to said air supply means so that said liquid medication will be drawn up through said capillary tube means to form droplets;
e. an axial cylindrical chimney inside said housing having an annular flange extending from said chimney, said flange resting against said housing, said chimney having removable check valve means at the top thereof, said flange having at least one drain opening permitting communication between fluid exiting said check valve and said cup;
f. horizontal target means perpendicular to said chimney axis for impingement of said air supply and said liquid droplets on said horizontal target means and on said check valve means, said droplets being broken into smaller micron size droplets by the impingement for delivery to a patient; and g. means for removing remaining larger liquid droplets exiting from said check valve means by force of gravity, said larger droplets passing through said at least one drain opening in said chimney flange and back to said bottom cup at all times exterior to said chimney.
2. A nebulizer as set forth in claim 1 wherein said housing is cylindrical and includes a closed top.
3. A nebulizer as set forth in claim 1 wherein said check valve means includes a valve holder removably received in an open top of said axial cylindrical chimney and a flexible valve membrane removably received on said valve holder.
4. A nebulizer as set forth in claim 1 wherein said horizontal target means extends across said cylindrical chimney.
5. A nebulizer as set forth in claim 4 wherein said horizontal target means includes a passageway therethrough to conduct atmospheric air from said air inlet tube.
6. A nebulizer as set forth in claim 5 wherein said horizontal target means includes a passageway therethrough to conduct atmospheric air from said air inlet tube.
7. A nebulizer which comprises:
a. a housing having a vertical axis, said housing having an open bottom, an air inlet tube extending into said housing, and an outlet tube extending from said housing;
b. a bottom cup removably attached to said open bottom for storing a supply of liquid medication therein, said bottom cup having an opening therethrough;
c. means to supply air under pressure through said bottom cup opening into said housing;
d. capillary tube means extending from said bottom cup to said air supply means so that said liquid medication will be drawn up through said capillary tube means to form droplets;
e. an axial cylindrical chimney inside said housing having an annular flange extending from said chimney and resting against said housing, means to decrease the size of said liquid droplets through impingement and circuitous flow, said means including a closed top for impingement and openings in said cylindrical chimney near said top; and f. horizontal target means extending across said cylindrical chimney substantially perpendicular to said chimney axis for impingement of said air supply and said liquid droplets on said horizontal target means, said droplets being broken into smaller micron size droplets.
a. a housing having a vertical axis, said housing having an open bottom, an air inlet tube extending into said housing, and an outlet tube extending from said housing;
b. a bottom cup removably attached to said open bottom for storing a supply of liquid medication therein, said bottom cup having an opening therethrough;
c. means to supply air under pressure through said bottom cup opening into said housing;
d. capillary tube means extending from said bottom cup to said air supply means so that said liquid medication will be drawn up through said capillary tube means to form droplets;
e. an axial cylindrical chimney inside said housing having an annular flange extending from said chimney and resting against said housing, means to decrease the size of said liquid droplets through impingement and circuitous flow, said means including a closed top for impingement and openings in said cylindrical chimney near said top; and f. horizontal target means extending across said cylindrical chimney substantially perpendicular to said chimney axis for impingement of said air supply and said liquid droplets on said horizontal target means, said droplets being broken into smaller micron size droplets.
8. A nebulizer which comprises:
a. a housing having a vertical axis, said housing having an open bottom, an air inlet tube extending into said housing, and an outlet tube extending from said housing;
b. a bottom cup removably attached to said open bottom for storing a supply of liquid medication therein, said bottom cup having an opening therethrough;
c. means to supply air under pressure through said bottom cup opening;
d. capillary means extending from said bottom cup to said air supply means so that said liquid medication will be drawn up through said capillary means to form droplets;
e. an axial cylindrical chimney inside said housing having an annular flange extending from said chimney and resting against said housing;
f. horizontal target means extending across said cylindrical chimney perpendicular to said chimney axis and having a passageway therethrough;
g. means to conduct and distribute atmospheric air through said passageway from said air inlet tube in said housing, in order to evenly and thoroughly mix atmospheric air in said housing, wherein said air under pressure and said liquid droplets impinge on said horizontal target means, and said droplets are broken into smaller micron size droplets.
a. a housing having a vertical axis, said housing having an open bottom, an air inlet tube extending into said housing, and an outlet tube extending from said housing;
b. a bottom cup removably attached to said open bottom for storing a supply of liquid medication therein, said bottom cup having an opening therethrough;
c. means to supply air under pressure through said bottom cup opening;
d. capillary means extending from said bottom cup to said air supply means so that said liquid medication will be drawn up through said capillary means to form droplets;
e. an axial cylindrical chimney inside said housing having an annular flange extending from said chimney and resting against said housing;
f. horizontal target means extending across said cylindrical chimney perpendicular to said chimney axis and having a passageway therethrough;
g. means to conduct and distribute atmospheric air through said passageway from said air inlet tube in said housing, in order to evenly and thoroughly mix atmospheric air in said housing, wherein said air under pressure and said liquid droplets impinge on said horizontal target means, and said droplets are broken into smaller micron size droplets.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/705,588 US5241954A (en) | 1991-05-24 | 1991-05-24 | Nebulizer |
| CA002105315A CA2105315C (en) | 1991-05-24 | 1993-09-01 | Nebulizer |
| EP93307040A EP0641570A1 (en) | 1991-05-24 | 1993-09-07 | Nebulizer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/705,588 US5241954A (en) | 1991-05-24 | 1991-05-24 | Nebulizer |
| CA002105315A CA2105315C (en) | 1991-05-24 | 1993-09-01 | Nebulizer |
| EP93307040A EP0641570A1 (en) | 1991-05-24 | 1993-09-07 | Nebulizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2105315A1 CA2105315A1 (en) | 1995-03-02 |
| CA2105315C true CA2105315C (en) | 1996-10-22 |
Family
ID=27169571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002105315A Expired - Fee Related CA2105315C (en) | 1991-05-24 | 1993-09-01 | Nebulizer |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5241954A (en) |
| EP (1) | EP0641570A1 (en) |
| CA (1) | CA2105315C (en) |
Families Citing this family (53)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5660167A (en) * | 1991-02-04 | 1997-08-26 | Ryder; Steven L. | Dual nozzle nebulizer |
| US5241954A (en) * | 1991-05-24 | 1993-09-07 | Glenn Joseph G | Nebulizer |
| DE59409856D1 (en) * | 1994-05-19 | 2001-10-11 | Pari Gmbh | Device for drying and buffering aerosols |
| US5603314A (en) * | 1995-03-22 | 1997-02-18 | Bono; Michael | Aerosol filtration device and inhalation apparatus containing same |
| US5823179A (en) * | 1996-02-13 | 1998-10-20 | 1263152 Ontario Inc. | Nebulizer apparatus and method |
| SE9603804D0 (en) | 1996-10-16 | 1996-10-16 | Aga Ab | Method and apparatus for producing a atomized aerosol |
| US6345617B1 (en) | 1997-09-26 | 2002-02-12 | 1263152 Ontario Inc. | Aerosol medication delivery apparatus and system |
| US6293279B1 (en) | 1997-09-26 | 2001-09-25 | Trudell Medical International | Aerosol medication delivery apparatus and system |
| US6230703B1 (en) * | 1999-06-02 | 2001-05-15 | Michael Bono | Aerosol inhalation device providing improved aerosol delivery |
| US6510846B1 (en) | 1999-12-23 | 2003-01-28 | O'rourke Sam | Sealed back pressure breathing device |
| US6412481B1 (en) | 1999-12-23 | 2002-07-02 | Robert Bienvenu | Sealed backpressure attachment device for nebulizer |
| AU4867001A (en) | 2000-04-11 | 2001-10-23 | Trudell Medical International | Aerosol delivery apparatus with positive expiratory pressure capacity |
| US8336545B2 (en) | 2000-05-05 | 2012-12-25 | Novartis Pharma Ag | Methods and systems for operating an aerosol generator |
| US7600511B2 (en) * | 2001-11-01 | 2009-10-13 | Novartis Pharma Ag | Apparatus and methods for delivery of medicament to a respiratory system |
| US7971588B2 (en) | 2000-05-05 | 2011-07-05 | Novartis Ag | Methods and systems for operating an aerosol generator |
| US6363932B1 (en) * | 2000-07-06 | 2002-04-02 | Clinical Technologies, Inc. | Aerosol enhancement device |
| US7204245B2 (en) * | 2000-07-06 | 2007-04-17 | Clinical Technologies, Inc | Aerosol enhancement device |
| AU2002238801A1 (en) | 2001-03-20 | 2002-10-03 | Trudell Medical International | Nebulizer apparatus and method |
| WO2003026559A2 (en) | 2001-09-28 | 2003-04-03 | Kurve Technology, Inc | Nasal nebulizer |
| US6994083B2 (en) | 2001-12-21 | 2006-02-07 | Trudell Medical International | Nebulizer apparatus and method |
| US6705316B2 (en) * | 2002-03-11 | 2004-03-16 | Battelle Pulmonary Therapeutics, Inc. | Pulmonary dosing system and method |
| US20030205226A1 (en) | 2002-05-02 | 2003-11-06 | Pre Holding, Inc. | Aerosol medication inhalation system |
| US8122881B2 (en) * | 2002-05-09 | 2012-02-28 | Kurve Technology, Inc. | Particle dispersion device for nasal delivery |
| US6904908B2 (en) | 2002-05-21 | 2005-06-14 | Trudell Medical International | Visual indicator for an aerosol medication delivery apparatus and system |
| US7267120B2 (en) * | 2002-08-19 | 2007-09-11 | Allegiance Corporation | Small volume nebulizer |
| US8001962B2 (en) * | 2002-08-23 | 2011-08-23 | Sheiman Ultrasonic Research Foundation Pty Ltd. | Nebulizing and drug delivery device |
| US7563244B2 (en) * | 2002-10-31 | 2009-07-21 | Hewlett-Packard Development Company, L.P. | Device for mixing and delivering pharmaceutical compositions |
| US20050042170A1 (en) * | 2003-02-14 | 2005-02-24 | The Brigham And Women's Hospital, Inc. | Method and device for generating mists and medical uses thereof |
| US7270123B2 (en) * | 2003-08-13 | 2007-09-18 | Trudell Medical International | Nebulizer apparatus and method |
| GB0320573D0 (en) * | 2003-09-03 | 2003-10-01 | Intersurgical Ltd | Improvements relating to medical apparatus |
| US20070131230A1 (en) * | 2003-09-05 | 2007-06-14 | Kurve Technology, Inc. | Nasal adapter for the base of the nose |
| US8001963B2 (en) * | 2003-09-05 | 2011-08-23 | Kurve Technology, Inc. | Integrated nebulizer and particle dispersion chamber for nasal delivery of medicament to deep nasal cavity and paranasal sinuses |
| US20050183718A1 (en) | 2004-02-24 | 2005-08-25 | Boehringer Ingelheim International Gmbh | Nebulizer |
| US7721729B2 (en) * | 2005-03-09 | 2010-05-25 | Ric Investments, Llc | Nebulizing drug delivery device for ventilator |
| US7665465B2 (en) * | 2005-03-25 | 2010-02-23 | Ric Investments, Llc | Headgear assembly for a respiratory support system |
| EP2021131B1 (en) * | 2005-05-23 | 2011-07-13 | Biosonic Australia Pty. Ltd. | Apparatus for atomisation and liquid filtration |
| WO2007000330A2 (en) * | 2005-06-29 | 2007-01-04 | Boehringer Ingelheim International Gmbh | Method and device for atomising liquid |
| CA2698137A1 (en) | 2006-08-30 | 2008-03-06 | Kurve Technology, Inc. | Aerosol generating and delivery device |
| US8276587B2 (en) * | 2008-02-15 | 2012-10-02 | Tsi, Incorporated | Automated qualitative mask fit tester |
| US9757528B2 (en) | 2010-08-23 | 2017-09-12 | Darren Rubin | Nebulizer having different negative pressure threshold settings |
| CA2808836C (en) | 2010-08-23 | 2020-05-12 | Darren Rubin | Systems and methods of aerosol delivery with airflow regulation |
| TWI517906B (en) * | 2012-08-31 | 2016-01-21 | 泰博科技股份有限公司 | Nebulizer and nozzle thereof |
| CN103157161B (en) * | 2011-12-09 | 2014-12-24 | 北京万生人和科技有限公司 | Device of driving liquid to be nebulized by gas |
| US9642980B2 (en) | 2013-03-15 | 2017-05-09 | Trudell Medical International | Ventilator circuit, adapter for use in ventilator circuit and methods for the use thereof |
| CN105597200A (en) * | 2016-02-04 | 2016-05-25 | 深圳金亿帝医疗设备股份有限公司 | Atomizing cup suite and compressed atomizer |
| MX2018014121A (en) | 2016-05-19 | 2019-04-29 | Trudell Medical Int | Smart valved holding chamber. |
| EP3984579A1 (en) | 2016-07-08 | 2022-04-20 | Trudell Medical International | Smart oscillating positive expiratory pressure device |
| US10786638B2 (en) | 2016-07-08 | 2020-09-29 | Trudell Medical International | Nebulizer apparatus and method |
| MX2019002488A (en) * | 2016-09-02 | 2019-11-21 | Inspirx Inc | Breath-enhanced jet nebulizer. |
| WO2018104805A1 (en) | 2016-12-09 | 2018-06-14 | Trudell Medical International | Smart nebulizer |
| JP7312754B2 (en) | 2018-01-04 | 2023-07-21 | トゥルーデル メディカル インターナショナル | Smart vibrating positive expiratory pressure device |
| CN108525087B (en) * | 2018-04-28 | 2021-02-05 | 中国人民解放军陆军军医大学第一附属医院 | Atomizer for medical care |
| WO2021038467A1 (en) | 2019-08-27 | 2021-03-04 | Trudell Medical International | Smart oscillating positive expiratory pressure device |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2826454A (en) * | 1949-04-14 | 1958-03-11 | Sebac Nouvelle Sa | Atomizers |
| DE1027189B (en) * | 1953-08-10 | 1958-04-03 | Lucien Dautrebande | Method and device for generating an aerosol |
| DE1198298B (en) * | 1959-09-18 | 1965-08-05 | Ritzau Pari Werk Kg Paul | Device for nebulising, atomizing or distributing liquid or powdery substances |
| US3857909A (en) * | 1973-04-11 | 1974-12-31 | Co Huggins J & Ass | Gas nebulizing apparatus |
| US4007238A (en) * | 1976-02-25 | 1977-02-08 | Glenn Joseph G | Nebulizer for use with IPPB equipment |
| US4116387A (en) * | 1976-05-11 | 1978-09-26 | Eastfield Corporation | Mist generator |
| US4251033A (en) * | 1978-06-12 | 1981-02-17 | Eastfield Corporation | Mist generating structure and molding apparatus therefor |
| US4344574A (en) * | 1979-10-24 | 1982-08-17 | Sherritt Gordon Mines Limited | Cross-flow nebulizer |
| DE3036817A1 (en) * | 1980-09-30 | 1982-05-19 | Walter Dr. Kreuzlingen Wild | METHOD AND DEVICE FOR GENERATING AN INTERMITTENT SPRAY |
| DE3043377A1 (en) * | 1980-11-17 | 1982-07-01 | Brugger, Inge, 8130 Starnberg | SPRAYER |
| DE3224849A1 (en) * | 1982-07-02 | 1984-01-05 | Plantorgan Werk Heinrich G.E. Christensen, KG, 2903 Bad Zwischenahn | STEAM INHALER |
| US4512341A (en) * | 1982-11-22 | 1985-04-23 | Lester Victor E | Nebulizer with capillary feed |
| EP0166476B1 (en) * | 1984-05-28 | 1989-05-03 | MALLINCKRODT, INC.(a Missouri corporation) | Aerosol generator-inhalator |
| GB8701957D0 (en) * | 1987-01-29 | 1987-03-04 | Lifeline Ltd | Nebulizer |
| US4792097A (en) * | 1987-03-31 | 1988-12-20 | Mallinckrodt, Inc. | Non-sputtering nebulizer |
| GB2233919A (en) * | 1989-07-12 | 1991-01-23 | Stephen Peter Newman | "Aerosol delivery apparatus" |
| US5241954A (en) * | 1991-05-24 | 1993-09-07 | Glenn Joseph G | Nebulizer |
| US5209225A (en) * | 1991-11-19 | 1993-05-11 | Glenn Joseph G | Flow through nebulizer |
-
1991
- 1991-05-24 US US07/705,588 patent/US5241954A/en not_active Expired - Fee Related
-
1993
- 1993-09-01 CA CA002105315A patent/CA2105315C/en not_active Expired - Fee Related
- 1993-09-07 EP EP93307040A patent/EP0641570A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US5241954A (en) | 1993-09-07 |
| CA2105315A1 (en) | 1995-03-02 |
| EP0641570A1 (en) | 1995-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2105315C (en) | Nebulizer | |
| US5209225A (en) | Flow through nebulizer | |
| US3580249A (en) | Aerosol nebulizers | |
| EP0957960B1 (en) | Breathing circuit apparatus for a nebulizer | |
| CA1117391A (en) | Apparatus for producing finely divided liquid spray | |
| EP0880373B1 (en) | Nebulizer apparatus | |
| EP0932425B1 (en) | A method and a device for producing a fine homogeneous aerosol | |
| CA1130160A (en) | Nebulizer with variable flow rate control | |
| JP2005319310A (en) | Nebulizer respiratory apparatus | |
| EP0630271A1 (en) | Powder nebulizer apparatus and method of nebulization | |
| JPS637789B2 (en) | ||
| US6796513B2 (en) | Nebulizer vial for aerosol therapy | |
| US5612226A (en) | Gas/liquid contact apparatus | |
| EP1448311A1 (en) | A modified nebulizer | |
| AU2004202959B2 (en) | Nebulizer Apparatus and Method | |
| US4182325A (en) | Steam-air inhalator | |
| AU771684B2 (en) | Nebulizer apparatus and method | |
| GB2233919A (en) | "Aerosol delivery apparatus" | |
| RU2143283C1 (en) | Inhaler | |
| WO2002040085A2 (en) | Nebulizing chamber for aerosol therapy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |