CA1279548C - Aspirator/nebulizer - Google Patents
Aspirator/nebulizerInfo
- Publication number
- CA1279548C CA1279548C CA000518446A CA518446A CA1279548C CA 1279548 C CA1279548 C CA 1279548C CA 000518446 A CA000518446 A CA 000518446A CA 518446 A CA518446 A CA 518446A CA 1279548 C CA1279548 C CA 1279548C
- Authority
- CA
- Canada
- Prior art keywords
- air
- oxygen
- blower
- turbine
- patient
- 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
- 239000006199 nebulizer Substances 0.000 title abstract description 3
- 239000001301 oxygen Substances 0.000 claims abstract description 56
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 56
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 55
- 230000000241 respiratory effect Effects 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 38
- 239000012080 ambient air Substances 0.000 description 4
- 239000003242 anti bacterial agent Substances 0.000 description 2
- 229940088710 antibiotic agent Drugs 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical group [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000002664 inhalation therapy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/10—Preparation of respiratory gases or vapours
- A61M16/12—Preparation of respiratory gases or vapours by mixing different gases
- A61M16/122—Preparation of respiratory gases or vapours by mixing different gases with dilution
- A61M16/125—Diluting primary gas with ambient air
-
- 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/0057—Pumps therefor
- A61M16/0066—Blowers or centrifugal pumps
-
- 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
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators; Tracheal tubes
- A61M16/20—Valves specially adapted to medical respiratory 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
- A61M2202/00—Special media to be introduced, removed or treated
- A61M2202/02—Gases
- A61M2202/0208—Oxygen
-
- 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
- A61M2205/00—General characteristics of the apparatus
- A61M2205/82—Internal energy supply devices
- A61M2205/8218—Gas operated
Landscapes
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
ASPIRATOR/NEBULIZER
Abstract A respiratory care device utilizes pressurized oxygen to pump an oxygen/air mixture to the patient. The device comprises a coupled turbine and blower. The pres-surized oxygen drives the turbine which pumps air through the blower. The oxygen may be mixed with the air in selected ratios and delivered to the patient. Droplets may be added to the oxygen, to the air or to the mixture, upstream or downstream of the device or within the device.
Abstract A respiratory care device utilizes pressurized oxygen to pump an oxygen/air mixture to the patient. The device comprises a coupled turbine and blower. The pres-surized oxygen drives the turbine which pumps air through the blower. The oxygen may be mixed with the air in selected ratios and delivered to the patient. Droplets may be added to the oxygen, to the air or to the mixture, upstream or downstream of the device or within the device.
Description
`~ ` 12~9S~L~
ASPIRATOR/NEBULIZER
Background of the Invention Current inhalation therapy requirements vary over a wide range. For example, high-oxygen concentration streams are occasionally required for short durations, but the longer term care generally demands low oxygen gas. But the total gas volume needs of the patient (air plus oxygen) remains nearly constant.
These broad requirements necessitate an aspirator device with a high degree of flexibility in effecting the desired composition and flow rate.
Moreover, moderate back pressures caused by patient exhalation together with the use of long, small-diameter delivery tubes could beneficially be overcome by a device capable of pro-viding necessary gas volumes.
Summary of the Invention It is an object of the present invention to provide an aspirator which has the flexibility to deliver an air/oxygen mix-ture at nearly constant volume with an easily selectable composi-tion.
It is a further object to provide a device which can deliver the gas mixture at high or low flow rates.
It is also an object to provide a device for delivering the gas mixture at such pressure as to be able to overcome the back pressures inherent in a patient delivery system using smaller-bore tubing than presently used.
~279~48 ~ 2 - 26494-107 It is finally an object ~o provide such a device which is of such simplicity and cost that it can be wholly or partly disposable.
In accordance with the objectives, the invention is an apparatus for diluting a high-pressure oxygen stream with ambient air.
In its broadest sense, the invention comprises a device for causing high-pressure oxygen to do mechanical work to pump low pressure air and then mixing selected portions of the air and oxygen into a therapeutic mixture.
In a narrower sense, the invention comprises a respira-tory care device for delivering an oxygen-containing gas under positive pressure to a patient comprising:
a source of high-pressure oxygen, a source of air, a rotatable gas turbine, a rotatable blower coupled to the gas turbine for ro-tation therewith and having an air entrance communicating with the source of air to admit the air to the blower and an air exit for discharging the air from the blower, means for utilizing at least a first portion of the high-pressure oxygen to rotate the turbine, means for delivering the air from the blower air exit to the patient, and means for mixing a second portion of the oxygen with the air prior to delivery to the patient.
.p _ 95~8 - 2a - 26494-107 Brief Description of the Drawin~s Fig. 1 is a schematic view of the turbine/blower device according to the invention.
Fig. 2 is a sectional elevation view through the inter-nal parts of the turbine/blower device.
Fig. 3 is a side view of the device in Fig. 2 looking at the turbine.
Descri tion of the Invention p It would be desirable in the respiratory care field to be able to deliver large volumes of oxygen or an oxygen/air mix-ture to a patient at fairly high pressure and a constant compo-sition. Currently the inability to do this has resulted in the use of open patient masks and large diameter corrugated tubes which have a low back pressure. With this apparatus, a flow of 40-60 liters-per-minute (lpm) of gas can reach the patient but only 1-2 lpm are used, the rest is lost out the mask openings.
Moreover, since the gas is at fairly low pressure, liquid in the gas may rainout in the patient hose leaving a site for infectious organisms to grow. Antibiotics cannot be added to the gas with-out contaminating the entire area through the open mask.
1~79548 The present device provides for the pumping of air or air/oxygen mixture at up to about 50 lpm and a pressure equal to 2-3 inches of water. This enables the use of a medium back pressure closed mask and small 05 diameter delivery tube~ The small quantities of gas (e.g.
1-2 lpm) that are genuinely needed can be delivered and maintained "on demand" because of the pressurization cap-ability. The back pressure capability allows small--bore-tubing to be used which results in high gas velo-10 cities preventing rainout. It is also now possible tofilter the gas (which requires a pressure drop) and to add antibiotics to the patient gas ~since it is directed to a closed mask).
In general, the current technology involves 15 using the high pressure (50 psi) oxygen stream in hospital rooms to aspirate air and liquid through venturi action (so called Bernoulli devices). This operation tends to limit oxygen concentration to about 27-28% minimum. The present invention proposes to more directly pump the room 20 air by causing the oxygen to do mechanical work to run an air compressor and then mixing portions of the oxygen with the compressed air. The oxygen concentration could, of course, be reduced to that of the ambient air since no oxygen need be mixed in the final gas.
Fig. 1 shows a schematic of one embodiment of the invention. The aspirator device 1 comprises an oxygen turbine 2 mounted for rotation with a blower 3 through shaft 9. The turbine may be rotated by impulse or reaction by the oxygen stream entering through an orifice 4 and 30 exiting through outlet 5. An impulse turbine is shown in the Figure. The blower pumps room air through entrance 6 out exit 7. Valve 8 allows a selectable portion of the air to be dumped through line 12 and a selected portion to be directed to the patient through delivery hose 11. Valve ;48 10 allows spent oxygen from the turbine to be dumped through line 13 or delivered to the patient through line 11 .
Figs. 2 and 3 show more detail of the turbine/-05 blower embodiment. A turbine housing consists of a circu-lar front plate 21 joined to a back container 23. The blower housing 25 is fixed to the back container 23 by convenient means. Shaft 24 is fixed to the front plate and extends axially through the turbine housing into the 10 blower housing. A cylindrical bearing 26 is rotatable on the shaft 24. Turbine 22 and blower 27 are fixed for rotation on the bearing 26.
Oxygen orifice 28 directs the oxygen stream against the turbine blades. Oxygen exit 29 exhausts the 15 spent oxygen. Air entrance 30 on the blower housing is in communication with room air to pump air through the device and out air outlet 31.
The turbine is preferably directly coupled to the blower without gears. It preferably has single stage, 20 backward curved blades though other configurations may also be used. The blower is preferably a conventional, center-draw forward-blade fan. Typically, an orifice O.2-0.5 mm in diameter can deliver 1-2 lpm oxygen to the turbine and rotate it at up to about 12,000 rpm delivering 25 air at about 50 lpm and 3 inches of water back pressure.
The aspirator is preferably disposable and made of plastic parts (except for the bearings and shaft). In this case oxygen from the turbine could be mixed with the compressed air. Alternatively, the turbine portion may be 30 designed to be reusable, allowing for use of better con-struction materials. The blower would be disposable since it has direct communication to the patient. In this case, the oxygen to the turbine would be bled from the main oxygen stream (only 1-2 lpm are needed) and any oxygen 35 requirements for mixing with the air would be met with ~27954~3 fresh oxygen from the main ~tream. The main oxygen stream could enter the compressed gas downstream of the blower or could enter the blower with the ambient air at the air inlet.
05 Liquid or a liquid/medicament mixture may be added at any convenient point. For example, a con-ventional mist generator could be used to supply moisture to the air inlet on the blower. The main oxygen stream could also be used to lift and nebulize liquid in the 10 conventional way for introduction to the blower air inlet or to the compressed gas downstream of the device.
The invention has been described particularly with respect to a turbine/blower device. In the broader sense, however, the invention envisions the use of any convenient device for converting the energy in the pres-surized oxygen into useful mechanical energy to increase the pressure of low pressure, ambient air. For example, a reciprocating positive displacement pump, pressurized bottle, gear pump, hydraulic multiplier, vibrating mem-20 brane, or shear drag turbine could be used in place of theturbine. ~nlike conventional Bernoulli the oxygen and air may be kept separate so that air itself may be delivered to the patient under slight pressure or a mixture of air and oxygen may be delivered.
Examples of the Preferred Embodiment An aspirator device such as shown in Figs. 2 and 3 was constructed. A 7.5 cm diameter turbine with back-ward-curved, single-stage blades was fixed in a housing.
The housing back was made of aluminum while the face plate 30 was a clear polycarbonate. The oxygen nozzle was about 0.4 mm in diameter. The turbine was mounted on a shaft and a porous bronze bearing.
~27~548 The blower had a 14 CFM output. The impeller was contained in a light polycarbonate housing and coupled to the turbine through the bearing.
Three feet of patient hose ~22 mm I.D.) was 05 attached to the air output. The spent oxygen from the turbine was mixed with the compressed air output. Table 1 shows the mixing results.
Air 2 input OutputShaft speed (lpm) (lpm) (rpm~ 2%
1 0.5 30.1 800 26.5 2 1.0 43.2 1148 25.8 3 1.3 51.4 1367 25.7 15 4 1.5 56.8 1511 25.6 ; 5 2.0 S9.4 1844 25.8 6 2.5 80.2 2131 26.0 7 2.7 85.6 2276 26.2
ASPIRATOR/NEBULIZER
Background of the Invention Current inhalation therapy requirements vary over a wide range. For example, high-oxygen concentration streams are occasionally required for short durations, but the longer term care generally demands low oxygen gas. But the total gas volume needs of the patient (air plus oxygen) remains nearly constant.
These broad requirements necessitate an aspirator device with a high degree of flexibility in effecting the desired composition and flow rate.
Moreover, moderate back pressures caused by patient exhalation together with the use of long, small-diameter delivery tubes could beneficially be overcome by a device capable of pro-viding necessary gas volumes.
Summary of the Invention It is an object of the present invention to provide an aspirator which has the flexibility to deliver an air/oxygen mix-ture at nearly constant volume with an easily selectable composi-tion.
It is a further object to provide a device which can deliver the gas mixture at high or low flow rates.
It is also an object to provide a device for delivering the gas mixture at such pressure as to be able to overcome the back pressures inherent in a patient delivery system using smaller-bore tubing than presently used.
~279~48 ~ 2 - 26494-107 It is finally an object ~o provide such a device which is of such simplicity and cost that it can be wholly or partly disposable.
In accordance with the objectives, the invention is an apparatus for diluting a high-pressure oxygen stream with ambient air.
In its broadest sense, the invention comprises a device for causing high-pressure oxygen to do mechanical work to pump low pressure air and then mixing selected portions of the air and oxygen into a therapeutic mixture.
In a narrower sense, the invention comprises a respira-tory care device for delivering an oxygen-containing gas under positive pressure to a patient comprising:
a source of high-pressure oxygen, a source of air, a rotatable gas turbine, a rotatable blower coupled to the gas turbine for ro-tation therewith and having an air entrance communicating with the source of air to admit the air to the blower and an air exit for discharging the air from the blower, means for utilizing at least a first portion of the high-pressure oxygen to rotate the turbine, means for delivering the air from the blower air exit to the patient, and means for mixing a second portion of the oxygen with the air prior to delivery to the patient.
.p _ 95~8 - 2a - 26494-107 Brief Description of the Drawin~s Fig. 1 is a schematic view of the turbine/blower device according to the invention.
Fig. 2 is a sectional elevation view through the inter-nal parts of the turbine/blower device.
Fig. 3 is a side view of the device in Fig. 2 looking at the turbine.
Descri tion of the Invention p It would be desirable in the respiratory care field to be able to deliver large volumes of oxygen or an oxygen/air mix-ture to a patient at fairly high pressure and a constant compo-sition. Currently the inability to do this has resulted in the use of open patient masks and large diameter corrugated tubes which have a low back pressure. With this apparatus, a flow of 40-60 liters-per-minute (lpm) of gas can reach the patient but only 1-2 lpm are used, the rest is lost out the mask openings.
Moreover, since the gas is at fairly low pressure, liquid in the gas may rainout in the patient hose leaving a site for infectious organisms to grow. Antibiotics cannot be added to the gas with-out contaminating the entire area through the open mask.
1~79548 The present device provides for the pumping of air or air/oxygen mixture at up to about 50 lpm and a pressure equal to 2-3 inches of water. This enables the use of a medium back pressure closed mask and small 05 diameter delivery tube~ The small quantities of gas (e.g.
1-2 lpm) that are genuinely needed can be delivered and maintained "on demand" because of the pressurization cap-ability. The back pressure capability allows small--bore-tubing to be used which results in high gas velo-10 cities preventing rainout. It is also now possible tofilter the gas (which requires a pressure drop) and to add antibiotics to the patient gas ~since it is directed to a closed mask).
In general, the current technology involves 15 using the high pressure (50 psi) oxygen stream in hospital rooms to aspirate air and liquid through venturi action (so called Bernoulli devices). This operation tends to limit oxygen concentration to about 27-28% minimum. The present invention proposes to more directly pump the room 20 air by causing the oxygen to do mechanical work to run an air compressor and then mixing portions of the oxygen with the compressed air. The oxygen concentration could, of course, be reduced to that of the ambient air since no oxygen need be mixed in the final gas.
Fig. 1 shows a schematic of one embodiment of the invention. The aspirator device 1 comprises an oxygen turbine 2 mounted for rotation with a blower 3 through shaft 9. The turbine may be rotated by impulse or reaction by the oxygen stream entering through an orifice 4 and 30 exiting through outlet 5. An impulse turbine is shown in the Figure. The blower pumps room air through entrance 6 out exit 7. Valve 8 allows a selectable portion of the air to be dumped through line 12 and a selected portion to be directed to the patient through delivery hose 11. Valve ;48 10 allows spent oxygen from the turbine to be dumped through line 13 or delivered to the patient through line 11 .
Figs. 2 and 3 show more detail of the turbine/-05 blower embodiment. A turbine housing consists of a circu-lar front plate 21 joined to a back container 23. The blower housing 25 is fixed to the back container 23 by convenient means. Shaft 24 is fixed to the front plate and extends axially through the turbine housing into the 10 blower housing. A cylindrical bearing 26 is rotatable on the shaft 24. Turbine 22 and blower 27 are fixed for rotation on the bearing 26.
Oxygen orifice 28 directs the oxygen stream against the turbine blades. Oxygen exit 29 exhausts the 15 spent oxygen. Air entrance 30 on the blower housing is in communication with room air to pump air through the device and out air outlet 31.
The turbine is preferably directly coupled to the blower without gears. It preferably has single stage, 20 backward curved blades though other configurations may also be used. The blower is preferably a conventional, center-draw forward-blade fan. Typically, an orifice O.2-0.5 mm in diameter can deliver 1-2 lpm oxygen to the turbine and rotate it at up to about 12,000 rpm delivering 25 air at about 50 lpm and 3 inches of water back pressure.
The aspirator is preferably disposable and made of plastic parts (except for the bearings and shaft). In this case oxygen from the turbine could be mixed with the compressed air. Alternatively, the turbine portion may be 30 designed to be reusable, allowing for use of better con-struction materials. The blower would be disposable since it has direct communication to the patient. In this case, the oxygen to the turbine would be bled from the main oxygen stream (only 1-2 lpm are needed) and any oxygen 35 requirements for mixing with the air would be met with ~27954~3 fresh oxygen from the main ~tream. The main oxygen stream could enter the compressed gas downstream of the blower or could enter the blower with the ambient air at the air inlet.
05 Liquid or a liquid/medicament mixture may be added at any convenient point. For example, a con-ventional mist generator could be used to supply moisture to the air inlet on the blower. The main oxygen stream could also be used to lift and nebulize liquid in the 10 conventional way for introduction to the blower air inlet or to the compressed gas downstream of the device.
The invention has been described particularly with respect to a turbine/blower device. In the broader sense, however, the invention envisions the use of any convenient device for converting the energy in the pres-surized oxygen into useful mechanical energy to increase the pressure of low pressure, ambient air. For example, a reciprocating positive displacement pump, pressurized bottle, gear pump, hydraulic multiplier, vibrating mem-20 brane, or shear drag turbine could be used in place of theturbine. ~nlike conventional Bernoulli the oxygen and air may be kept separate so that air itself may be delivered to the patient under slight pressure or a mixture of air and oxygen may be delivered.
Examples of the Preferred Embodiment An aspirator device such as shown in Figs. 2 and 3 was constructed. A 7.5 cm diameter turbine with back-ward-curved, single-stage blades was fixed in a housing.
The housing back was made of aluminum while the face plate 30 was a clear polycarbonate. The oxygen nozzle was about 0.4 mm in diameter. The turbine was mounted on a shaft and a porous bronze bearing.
~27~548 The blower had a 14 CFM output. The impeller was contained in a light polycarbonate housing and coupled to the turbine through the bearing.
Three feet of patient hose ~22 mm I.D.) was 05 attached to the air output. The spent oxygen from the turbine was mixed with the compressed air output. Table 1 shows the mixing results.
Air 2 input OutputShaft speed (lpm) (lpm) (rpm~ 2%
1 0.5 30.1 800 26.5 2 1.0 43.2 1148 25.8 3 1.3 51.4 1367 25.7 15 4 1.5 56.8 1511 25.6 ; 5 2.0 S9.4 1844 25.8 6 2.5 80.2 2131 26.0 7 2.7 85.6 2276 26.2
Claims (5)
1. A respiratory care device for delivering an oxygen-containing gas under positive pressure to a patient comprising:
a source of high-pressure oxygen, a source of air, a rotatable gas turbine, a rotatable blower coupled to the gas turbine for rota-tion therewith and having an air entrance communicating with the source of air to admit the air to the blower and an air exit for discharging the air from the blower, means for utilizing at least a first portion of the high-pressure oxygen to rotate the turbine, means for delivering the air from the blower air exit to the patient, and means for mixing a second portion of the oxygen with the air prior to delivery to the patient.
a source of high-pressure oxygen, a source of air, a rotatable gas turbine, a rotatable blower coupled to the gas turbine for rota-tion therewith and having an air entrance communicating with the source of air to admit the air to the blower and an air exit for discharging the air from the blower, means for utilizing at least a first portion of the high-pressure oxygen to rotate the turbine, means for delivering the air from the blower air exit to the patient, and means for mixing a second portion of the oxygen with the air prior to delivery to the patient.
2. The respiratory care device of Claim 1 wherein the first and second portions of the oxygen are separate streams.
3. The respiratory care device of Claim 2 wherein the means for mixing the second portion of the oxygen is located up-stream of the blower entrance.
4. The respiratory care device of Claim 2 wherein the means for mixing the second portion of the oxygen is located downstream of the blower exit.
5. A respiratory care device for delivering an oxygen-containing gas under pressure to a patient comprising:
a source of high-pressure oxygen, a source of air, a rotatable gas turbine, a rotatable blower coupled to the gas turbine for ro-tation therewith and having an air entrance communicating with the source of air to admit the air to the blower and an air exit for discharging the air from the blower, means for utilizing at least a first portion of the high-pressure oxygen to rotate the turbine, means for delivering the air from the blower air exit to the patient, and means for nebulizing a liquid with a second portion of the high-pressure oxygen and mixing the second portion of oxygen and nebulized liquid with the air downstream of the turbine prior to the patient.
a source of high-pressure oxygen, a source of air, a rotatable gas turbine, a rotatable blower coupled to the gas turbine for ro-tation therewith and having an air entrance communicating with the source of air to admit the air to the blower and an air exit for discharging the air from the blower, means for utilizing at least a first portion of the high-pressure oxygen to rotate the turbine, means for delivering the air from the blower air exit to the patient, and means for nebulizing a liquid with a second portion of the high-pressure oxygen and mixing the second portion of oxygen and nebulized liquid with the air downstream of the turbine prior to the patient.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77883885A | 1985-09-23 | 1985-09-23 | |
| US778,838 | 1985-09-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1279548C true CA1279548C (en) | 1991-01-29 |
Family
ID=25114548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000518446A Expired - Fee Related CA1279548C (en) | 1985-09-23 | 1986-09-18 | Aspirator/nebulizer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0239615A1 (en) |
| JP (1) | JPS63500988A (en) |
| CA (1) | CA1279548C (en) |
| WO (1) | WO1987001599A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8900781A (en) * | 1989-03-30 | 1990-10-16 | Hosta B V | TRAILER CONTROL. |
| DE19626924C2 (en) * | 1996-07-04 | 1999-08-19 | Epazon B V | Breathing gas supply device |
| US5848591A (en) * | 1996-07-05 | 1998-12-15 | Dragerwerk Ag | Respirator with oxygen enrichment |
| DE19714644C2 (en) * | 1997-04-09 | 1999-09-02 | Draegerwerk Ag | Gas delivery device for ventilators and anesthetic devices and their use |
| US7204249B1 (en) * | 1997-10-01 | 2007-04-17 | Invcare Corporation | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage |
| US5988165A (en) | 1997-10-01 | 1999-11-23 | Invacare Corporation | Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization |
| US20030108441A1 (en) * | 2001-12-07 | 2003-06-12 | Mackie Scott Robert | Gases mixing apparatus |
| CN117045914A (en) | 2011-07-13 | 2023-11-14 | 费雪派克医疗保健有限公司 | Pressurized gas source |
| WO2013116820A1 (en) | 2012-02-03 | 2013-08-08 | Invacare Corporation | Pumping device |
| AU2013101734A4 (en) | 2012-12-18 | 2015-09-24 | Fisher & Paykel Healthcare Limited | Impeller and motor assembly |
| CN106860990B (en) * | 2017-03-15 | 2017-12-19 | 吴丽敏 | A kind of medical respiration auxiliary machine |
| SG11201909879QA (en) | 2017-04-23 | 2019-11-28 | Fisher & Paykel Healthcare Ltd | Breathing assistance apparatus |
| CN111450376A (en) * | 2020-04-27 | 2020-07-28 | 北京海辉科技有限公司 | Novel air-oxygen mixed gas circuit |
| DE102022002797A1 (en) | 2022-08-02 | 2024-02-08 | Rajan Govinda | Dosing device for adding at least one pharmaceutically active substance to a breathing gas provided extracorporeally, device for providing a breathing gas with such a dosing device and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE893998C (en) * | 1951-07-07 | 1954-09-16 | Otto P Braun | Device for artificial breathing |
| US3045668A (en) * | 1959-01-20 | 1962-07-24 | Invengineering Inc | Intermittent positive pressure respirator |
| GB1041313A (en) * | 1963-08-22 | 1966-09-01 | Karl Ivar Edwardh | Improvements in and relating to a metering and mixing apparatus for liquids and/or gases |
| NZ177052A (en) * | 1975-03-26 | 1978-12-18 | Fisher & Paykel | Air and gas mixing constant mixture flow with varying gas supply |
-
1986
- 1986-09-15 EP EP86906087A patent/EP0239615A1/en not_active Withdrawn
- 1986-09-15 JP JP61505309A patent/JPS63500988A/en active Pending
- 1986-09-15 WO PCT/US1986/001919 patent/WO1987001599A1/en not_active Application Discontinuation
- 1986-09-18 CA CA000518446A patent/CA1279548C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63500988A (en) | 1988-04-14 |
| EP0239615A1 (en) | 1987-10-07 |
| WO1987001599A1 (en) | 1987-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |