AU7214901A - Improved expiration apparatus - Google Patents
Improved expiration apparatus Download PDFInfo
- Publication number
- AU7214901A AU7214901A AU72149/01A AU7214901A AU7214901A AU 7214901 A AU7214901 A AU 7214901A AU 72149/01 A AU72149/01 A AU 72149/01A AU 7214901 A AU7214901 A AU 7214901A AU 7214901 A AU7214901 A AU 7214901A
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- AU
- Australia
- Prior art keywords
- expiration
- tubular element
- ball
- resisting apparatus
- resisting
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- Orthopedics, Nursing, And Contraception (AREA)
- Percussion Or Vibration Massage (AREA)
- Invalid Beds And Related Equipment (AREA)
Description
Regulation 3.2
AUSTRALIA
PATENTS ACT, 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT
ORIGINAL
Name of Applicant: Actual Inventor: Address for service VICTORIA JANE ALISON VICTORIA JANE ALISON in Australia: A J PARK, Level 11, 60 Marcus Clarke Street, Canberra ACT 2601 Invention Title: Improved Expiration Apparatus The following statement is a full description of this invention, including the best nfMthodiof:prfdriihi'frti i cwn tocme/us 77 t 7--77- 777777--
III
-2- TECHNICAL FIELD The present invention relates to improvements in expiration-resisting apparatus designed for improving pulmonary ventilation.
BACKGROUND ART Various apparatus are known which are intended for a specific therapy in the respiratory field, by improving the peripheral ventilation of invalids having a respiration which is disturbed for various causes, such as, for example, chronic bronchitis, asthma, problems as regards compliance, an inadequate ratio of the pleural pressure with respect to the alveolar pressure, secondary infection, hypersecretion and mucous blockages. These apparatuses are used with success, but they are, however, all of a complex design, generally very cumbersome and very costly.
Apparatus of small dimensions have already been developed, which have a horizontal air passage connected to a vertical air passage with an outlet orifice. A movable element is disposed to obstruct the outlet orifice prior to expiration and to oppose or resist the expiration under the action of a resilient member or due to the effect of its own weight. In particular, an apparatus has been developed in which a heavy ball is disposed in the exhaust passage which is in the form of a vertical funnel.
The ball, free to be displaced vertically, is lifted from its support at the time of expiration and offering a resistance to the expiration by the effect of its own weight.
However, the results obtained with this apparatus are not as good as those obtained with the aforementioned more complex apparatus. Clinical tests have particularly shown that the percussion effect obtained with this type of apparatus remains small and is difficult to control.
US5451190 and US5018517 both detail apparatus designed for improving pulmonary ventilation. The apparatus of each of these patents has a first tubular part defining an air inlet wherein the patient may breathe out though the inlet. A second part is also provided that is a conical channel of which the axis is inclined upwardly by an angle of 60 degrees with respect to the axis of the first tubular part. A steel ball is arranged in the conical channel so as to occlude the channel before expiration. During expiration, the ball is displaced along the lowest portion of the channel and induces -3oscillating effects of resistance to expiration. A requirement of the devices of these patents is that the first tubular part in each case must be held horizontally and therefore the second upwardly inclined part is always 60 degrees to the horizontal for correct and effective operation of the apparatus. Therefore the patient must be sitting up or standing so that the first tubular part remains in a horizontal position. In some cases patients may have difficulty in sitting up or standing due to injury or illness.
SUMMARY OF THE INVENTION The object of the invention is to provide an apparatus which overcomes the abovementioned disadvantages or to at least provide the public with a useful choice.
Accordingly in a first aspect the present invention may broadly be said to consist in an expiration resisting apparatus for assisting pulmonary ventilation comprising or including: a) a substantially 1-shaped tubular element having a first part and a second part said first part having an air inlet defined by a profiled mouthpiece into which a patient is able to exhale and a second part having an exhaust passage, the axis of said passage being inclined upwardly with respect to the axis of said first part, b) a spherical ball moveable within said exhaust passage, c) a ball seat against which said ball rests to obstruct said exhaust passage prior to expiration, said ball able to be displaced freely in said passage and offering a resistance to the expiration of air exhaled by said patient by the effect of its own weight, d) ball retaining means for retaining said ball within said exhaust passage.
Preferably said first part has an eight sided exterior and eight sided interior and said second part has an eight sided exterior and circular interior.
Preferably said first part and said second part are detachable from one another.
Preferably said first part and said second part are locked to one another by means of a swivel joint which when used in conjunction with said profiled mouthpiece provide alternative orientations of said mouthpiece.
Preferably said second part has a first end connected into said first part by said swivel joint and a second end that has located thereon said ball retaining means.
d I I) r_ i. -4- Preferably said ball retaining means is a cover having at least one aperture allowing for the escape of air exhaled from said patient.
Preferably said second part has a portion extending from its end that connects to said first part, said portion being of lesser diameter than that of said second part.
Preferably said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said first part to provide for the locking together of said first part and said second part.
Alternatively said first part has a portion extending from its end that connects to said second part, said portion being of lesser diameter than that of said first part.
Alteratively said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said second part to provide for the locking together of said first part and said second part.
In a second aspect the present invention may broadly be said to consist in an expiration resisting apparatus for assisting pulmonary ventilation comprising or including: a) a first tubular element having an air inlet including a profiled mouthpiece, into which a patient is able to exhale and an outlet leading to a second tubular element, b) said second tubular element comprising an exhaust passage, the axis of said passage being inclined upwardly with respect to the axis of said first tubular element, c) a spherical ball moveable within said exhaust passage, d) a ball seat against which said ball rests to obstruct said exhaust passage prior to expiration, said ball able to be displaced freely in said passage and offering a resistance to the expiration of air exhaled by said patient by the effect of its own weight, e) ball retaining means for retaining said ball within said exhaust passage, f) a swivel joint for connecting said first tubular element with said second tubular element, so that said first tubular element is rotatable to provide different orientations of said profiled mouthpiece, while said exhaust passage of said second tubular element may remain inclined at a predetermined angle, thereby allowing a patient to use said apparatus when in a lying or side on position.
Preferably said first tubular element has an eight sided exterior and eight sided interior, and said second tubular part is comprised of a first and a second part, wherein said first part is substantially parallel to said first tubular element and said second part is bent at said predetermined angle to said first part.
Preferably said predetermined angle is approximately 60 degrees to the axis formed by said first tubular element.
Preferably said first tubular element and said second tubular element are detachable from one another.
Preferably said second tubular element has a portion extending from its end that connects to said first tubular element, said portion being of lesser diameter than that of said second tubular element.
Preferably said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said first tubular element to provide for the locking together of said first tubular element and said second tubular element.
Alternatively said first tubular element has a portion extending from its end that connects to said second tubular element, said portion being of lesser diameter than that of said first tubular element.
Alteratively said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said second tubular element to provide for the locking together of said first tubular element and said second tubular element.
In a third aspect the present invention may broadly be said to consist in an expiration resisting apparatus for assisting pulmonary ventilation comprising or including: -6a) a substantially 1-shaped tubular element having a first part and a second part said first part having an air inlet defined by a profiled mouthpiece into which a patient is able to exhale and a second part having an exhaust passage, the axis of said passage being inclined upwardly with respect to the axis of said first part, b) an insert, fitted within said second part, c) a spherical ball that is of a diameter able to be fitted and moveable within said insert so that said ball obstructs said exhaust passage prior to expiration, said ball being able to be displaced freely in said passage and offering a resistance to the expiration of air exhaled by said patient through said air inlet by the effect of its own weight, and d) a cover element attachable to said second part, said cover element having in it at least one aperture so as to allow the escape of air but to prevent the escape of said ball.
Preferably said first part has an eight sided exterior and eight sided interior and said second part has an eight sided exterior and circular interior.
Preferably said first part and said second part are detachable from one another.
Preferably said first part and said second part are locked to one another by means of a swivel joint which when used in conjunction with said profiled mouthpiece provide alternative orientations of said mouthpiece.
Preferably said second part has a first end connected into said first part by said swivel joint and a second end that has located thereon said ball retaining means.
Preferably said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said first part to provide for the locking together of said first part and said second part.
Alternatively said first part has a portion extending from its end that connects to said second part, said portion being of lesser diameter than that of said first part.
Alteratively said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said second part to provide for the locking together of said first part and said second part.
To those skilled in the art to which the invention relates, many changes in construction and widely differing embodiments and applications of the invention will suggest themselves without departing from the scope of the invention as defined in the appended claims. The disclosures and the descriptions herein are purely illustrative and are not intended to be in any sense limiting.
BRIEF DESCRIPTION OF THE DRAWINGS Preferred forms of the invention will be described with reference to the accompanying drawings in which; Figure 1 is a side-view of the preferred embodiment of the expiration-resisting apparatus, Figure 2 is a side-view of the preferred embodiment of the expiration-resisting apparatus, showing the interlocking swivel joint, Figure 3 is a cross-sectional side view of the preferred embodiment of the apparatus showing the movement of exhaled air through the apparatus, Figure 4 shows a cross-section of the interlocking swivel joint through AA in Figure 1, Figure 5 shows the preferred embodiment of the present invention wherein the mouthpiece is in one orientation, and Figure 6 shows the preferred embodiment of the present invention wherein the mouthpiece of the expiration resisting apparatus is in a second orientation.
DETAILED DESCRIPTION OF THE INVENTION The expiration assisting apparatus of the present invention provides a user with a means for improving their respiration, where respiration is disturbed by conditions such as chronic bronchitis, asthma, hyper secretion and mucous blockages. When expiring through the tubular apparatus of the present invention, a ball within a conical section of the tubular apparatus is displaced after an increase in air pressure within the conical canal of the apparatus. The ball is preferably made from steel but other appropriate materials may be used. The exhaled air therefore escapes through an opening which increases depending on the position of the ball. As the pressure drops, the ball rolls back to its previous position and once again blocks the conical canal, thus creating another build up of air pressure. The ball therefore oscillates in a damped motion. The oscillating effect of the air flux promotes the loosening and liquification of mucus and the like within the patients' lungs, without the patient having to resort to noticeable coughing. The apparatus of the present invention is provided with an interlocking swivelled joint between the mouthpiece and the ball and the conical canal of the apparatus. This allows for the mouthpiece to be rotated at different orientations thereby eliminating the need to maintain a necessarily horizontal positioning of the ball and conical part of the apparatus.
Referring now to Figure 1, the expiration resisting apparatus of the present invention comprises a mouthpiece 1, a first tubular element 2, a second tubular element 3 and a cover element 4. The first and second elements may be disengaged from each other by an interlocking means. The interlocking means having the purpose of allowing the swivelling of the first tubular element 2 and the mouthpiece 1 that is built into the first tubular element 2. This allows the second tubular part 3 to remain in a stationary position.
Referring now to Figures 2 and 3, the swivel joint is provided by an extending tubular part 5 in the second tubular part 3 that has a diameter less than that of the second tubular element 3 and has a number of protrusions 6 extending outwardly from the surface of the extending tubular part 5. The first tubular element 2 has an internal diameter corresponding to that of the extending tubular part 5 so as to allow the fitting of the extending tubular part 5 within the first tubular element 2. The protrusions 6 have corresponding recesses (see Figure 4) in the first tubular element 2 allowing the first and second elements to be connected and locked together. Furthermore, this swivel allows the mouthpiece 1 and first tubular element 2 to be rotated to enable differing orientations of the mouthpiece 1.
Referring to Figure 3, the first tubular element 2 comprises an air inlet at the mouthpiece 1 into which the patient is able to exhale. The second tubular element 3 is bent at an angle to the horizontal and has within the angled portion a conical element -9- 7. The larger end of the conical element 8 is located against the inner portions of the second tubular part 3. A ball 9 having a diameter larger than the smallest diameter of the conical element is simply sat within the conical element 7 and completely obstructs the passage formed by the conical element 7 before the patient breathes out. Connected to the farther end of the second tubular element 3 is a cover 4 that is able to be removed to allow for cleaning of the ball 9 and conical element 7.
The cover 4 has a number of openings 11 that allow the passing of air through the cover but prevent the ball 9 from leaving the second tubular element 3. The affixing of the cover 4 onto the second tubular element 3 is affected by screwing the cover 4 onto the tubular element 3 as the tubular element, as shown in Figure 2 has a area of less diameter 12 that has a thread (not shown) that fits with a corresponding thread on the cover, allowing for the cover to be attached to the second tubular part 3.
The conical element 7 is removably secured in the tubular part 3. The conical element 7 has an external rim 13 at the circumference of its end of larger diameter. The rim is adapted to be sat upon a ledge 14 formed on the circumference of the internal wall of the second tubular element 3. The internal diameter of the top part of the tubular element 3 corresponding to the diameter of the cover 4 has a reduced diameter thereby providing a ledge 14 upon which the conical element rests.
The expiration apparatus is therefore able to be easily separated into five parts, namely, the first tubular part 2 that has internally within it the mouthpiece 1, the second tubular element 3, the conical element 7, the cover 4 and the ball 9. The separation of the apparatus into these parts permits easy cleaning of the apparatus. The first and second tubular elements, conical element and cover are made from a plastic material, but may be made from other appropriate materials.
In order to obtain the desired percussion effect at the time of expiration by the patient, it is necessary to avoid the ball from lifting and floating above its support, that is the conical element 7. Therefore, the ball must remain in contact with the conical element 7. Therefore, the second tubular part 3 must remain in an upward position at an angle smaller than 900, so the axis line 16 must be less than 900 to the horizontal.
The ball 9 is displaced by rolling on the internal wall of the conical element 7, the lowest part of the wall forms a rolling bed for the ball and the highest part of the wall forms a stop that prevents movement of the ball.
When the first tubular element 2 is held in a horizontal position by the patient, before expiration, the ball obstructs the conical passage by the effect of gravity due to its weight. At the time of expiration, the instantaneous position of the ball results from a state of equilibrium between the pressure of the air expired by the patient and the force of gravity due to the weight of the ball. With the damping characteristic of the ball being very weak, what follows is an oscillatory movement of the ball, generating a variable pressure which opposes the expiration, by constituting a positive oscillating resistance to the expiration.
Referring now to Figures 1 and 4 where Figure 4 shows a cross-section through A-A of Figure 1. The first tubular element 2 has an octagonal outer perimeter 10 and an octagonal inner perimeter 15. The first 2 and second 3 tubular elements are connected to one another by fitting the protrusions 6, as provided within the extending tubular part 5 of the second tubular element 3, into corresponding recesses 17 in the first tubular element 2. The shape of the protrusions 6 is smooth so as to allow for a rotational movement of the second tubular element 3 within the first tubular element 2 to provide a swivelling joint and a substantial locking of the elements at various positions in the rotation.
It must be appreciated that the locking and swivelling of the first and second elements together by the protrusions and recesses is only one embodiment of the locking and rotating mechanism. Other embodiments, such as corresponding shaped interiors for example where the extended tubular part is hexagonal and rotatable within a corresponding hexagonal interior of the first tubular part. Alternatively, the extended tubular part and protrusions may be provided on the first tubular part and the recesses on the second tubular part.
Referring now to Figures 5 and 6, the mouthpiece of the expiration apparatus 1 is profiled to enable the elderly or others who cannot make a good lip-seal around a circular mouthpiece to make a seal between the mouthpiece and the patient's lips in a much easier manner. The mouthpiece may be pivoted, for example by 900 as shown -11in Figures 5 and 6 to allow for the patient to use the expiration resisting apparatus of the present invention in a lying down, sitting or side-on position. Previously with prior art devices the patient when using such a device was required to sit or stand thereby ensuring the apparatus was in a horizonal position. The provision of the swivel joint and profiled mouthpiece in the apparatus of the present invention allows for a much wider use of the apparatus especially for those patients who have difficulty in sitting up or standing due to injury or illness.
Therefore, the aim of the invention is to augment the percussion effect by the patient also being able to assume a gravity assisted postural drainage position in order to clear mucous blockage.
Claims (18)
1. An expiration resisting apparatus for assisting pulmonary ventilation comprising or including: a) a substantially 1-shaped tubular element having a first part and a second part said first part having an air inlet defined by a profiled mouthpiece into which a patient is able to exhale and a second part having an exhaust passage, the axis of said passage being inclined upwardly with respect to the axis of said first part, b) a spherical ball moveable within said exhaust passage, c) a ball seat against which said ball rests to obstruct said exhaust passage prior to expiration, said ball able to be displaced freely in said passage and offering a resistance to the expiration of air exhaled by said patient by the effect of its own weight, d) ball retaining means for retaining said ball within said exhaust passage.
2. An expiration resisting apparatus according to claim 1 wherein said first part has an eight sided exterior and eight sided interior and said second part has an eight sided exterior and circular interior.
3. An expiration resisting apparatus according to any one of claims 1 or 2 wherein said first part and said second part are detachable from one another.
4. An expiration resisting apparatus according to any one of claims 1 to 3 wherein said first part and said second part are locked to one another by means of a swivel joint which when used in conjunction with said profiled mouthpiece provide alternative orientations of said mouthpiece.
5. An expiration resisting apparatus according to any one of claims 1 to 4 wherein said second part has a first end connected into said first part by said swivel joint and a second end that has located thereon said ball retaining means.
6. An expiration resisting apparatus according to any one of claims 1 to 5 wherein said ball retaining means is a cover having at least one aperture allowing for the escape of air exhaled from said patient.
13- 7. An expiration resisting apparatus according to any one of claims 1 to 6 wherein said second part has a portion extending from its end that connects to said first part, said portion being of lesser diameter than that of said second part. 8. An expiration resisting apparatus according to any one of claims 1 to 7 wherein said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said first part to provide for the locking together of said first part and said second part. 9. An expiration resisting apparatus according to any one of claims 1 to 6 wherein said first part has a portion extending from its end that connects to said second part, said portion being of lesser diameter than that of said first part. An expiration resisting apparatus according to any one of claims 1 to 6 or 9 wherein said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said second part to provide for the locking together of said first part and said second part. 11. An expiration resisting apparatus for assisting pulmonary ventilation comprising or including: a) a first tubular element having an air inlet including a profiled mouthpiece, into which a patient is able to exhale and an outlet leading to a second tubular element, b) said second tubular element comprising an exhaust passage, the axis of said passage being inclined upwardly with respect to the axis of said first tubular element, c) a spherical ball moveable within said exhaust passage, d) a ball seat against which said ball rests to obstruct said exhaust passage prior to expiration, said ball able to be displaced freely in said passage and offering a resistance to the expiration of air exhaled by said patient by the effect of its own weight, e) ball retaining means for retaining said ball within said exhaust passage, -14- f) a swivel joint for connecting said first tubular element with said second tubular element, so that said first tubular element is rotatable to provide different orientations of said profiled mouthpiece, while said exhaust passage of said second tubular element may remain inclined at a predetermined angle, thereby allowing a patient to use said apparatus when in a lying or side on position. 12. An expiration resisting apparatus according to claim 11 wherein said first tubular element has an eight sided exterior and eight sided interior, and said second tubular part is comprised of a first and a second part, wherein said first part is substantially parallel to said first tubular element and said second part is bent at said predetermined angle to said first part. 13. An expiration resisting apparatus according to any one of claims 11 or 12 wherein said predetermined angle is approximately 60 degrees to the axis formed by said first tubular element.
14. An expiration resisting apparatus according to any one of claims 11 to 13 wherein said first tubular element and said second tubular element are detachable from one another. An expiration resisting apparatus according to any one of claims 11 to 14 wherein said second tubular element has a portion extending from its end that connects to said first tubular element, said portion being of lesser diameter than that of said second tubular element.
16. An expiration resisting apparatus according to any one of claims 11 to wherein said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said first tubular element to provide for the locking together of said first tubular element and said second tubular element.
17. An expiration resisting apparatus according to any one of claims 11 to 14 wherein said first tubular element has a portion extending from its end that connects to said second tubular element, said portion being of lesser diameter than that of said first tubular element.
18. An expiration resisting apparatus according to any one of claims 11 to 14 or 17 wherein said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said second tubular element to provide for the locking together of said first tubular element and said second tubular element.
19. An expiration resisting apparatus for assisting pulmonary ventilation comprising or including: a) a substantially 1-shaped tubular element having a first part and a second part said first part having an air inlet defined by a profiled mouthpiece into which a patient is able to exhale and a second part having an exhaust passage, the axis of said passage being inclined upwardly with respect to the axis of said first part, b) an insert, fitted within said second part, c) a spherical ball that is of a diameter able to be fitted and moveable within said insert so that said ball obstructs said exhaust passage prior to expiration, said ball being able to be displaced freely in said passage and offering a resistance to the expiration of air exhaled by said patient through said air inlet by the effect of its own weight, and d) a cover element attachable to said second part, said cover element having in it at least one aperture so as to allow the escape of air but to prevent the escape of said ball. An expiration resisting apparatus according to claim 19 wherein said first part has an eight sided exterior and eight sided interior and said second part has an eight sided exterior and circular interior.
21. An expiration resisting apparatus according to any one of claims 19 or wherein said first part and said second part are detachable from one another.
22. An expiration resisting apparatus according to any one of claims 19 to 21 wherein said first part and said second part are locked to one another by means of a swivel joint which when used in conjunction with said profiled mouthpiece provide alternative orientations of said mouthpiece. 16-
23. An expiration resisting apparatus according to any one of claims 19 to 22 wherein said second part has a first end connected into said first part by said swivel joint and a second end that has located thereon said ball retaining means.
24. An expiration resisting apparatus according to any one of claims 19 to 23 wherein said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said first part to provide for the locking together of said first part and said second part. An expiration resisting apparatus according to any one of claims 19 to 22 wherein said first part'has a portion extending from its end that connects to said second part, said portion being of lesser diameter than that of said first part.
26. An expiration resisting apparatus according to any one of claims 19 to 22 or wherein said portion is provided with at least one protrusion, located on the exterior surface of said portion, that is able to be engaged into at least one corresponding recess located in the interior surface of said second part to provide for the locking together of said first part and said second part.
27. An expiration apparatus as herein described with reference to any one of the accompanying drawings. b P~ i
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ50699800A NZ506998A (en) | 2000-09-15 | 2000-09-15 | Breathing exercise apparatus having the effect of increasing respiration rate from conditions such as chronic bronchitis, asthma, hypersecretion or mucous blockages characterised by a "J" or "L" shaped device with a rotable first portion and ball present in the second portion |
| NZ506998 | 2000-09-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU7214901A true AU7214901A (en) | 2002-03-21 |
Family
ID=19928112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU72149/01A Abandoned AU7214901A (en) | 2000-09-15 | 2001-09-13 | Improved expiration apparatus |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU7214901A (en) |
| NZ (1) | NZ506998A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530034A (en) * | 2020-05-15 | 2020-08-14 | 吉林大学第一医院 | Breathing training device for rehabilitation |
-
2000
- 2000-09-15 NZ NZ50699800A patent/NZ506998A/en unknown
-
2001
- 2001-09-13 AU AU72149/01A patent/AU7214901A/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111530034A (en) * | 2020-05-15 | 2020-08-14 | 吉林大学第一医院 | Breathing training device for rehabilitation |
| CN111530034B (en) * | 2020-05-15 | 2022-03-08 | 吉林大学第一医院 | Breathing training device for rehabilitation |
Also Published As
| Publication number | Publication date |
|---|---|
| NZ506998A (en) | 2003-04-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK1 | Application lapsed section 142(2)(a) - no request for examination in relevant period |