CN104491966B - The special respiratory assist system of tracheotomy - Google Patents
The special respiratory assist system of tracheotomy Download PDFInfo
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- CN104491966B CN104491966B CN201510001032.8A CN201510001032A CN104491966B CN 104491966 B CN104491966 B CN 104491966B CN 201510001032 A CN201510001032 A CN 201510001032A CN 104491966 B CN104491966 B CN 104491966B
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- trachea
- fibre
- tracheotomy
- assist system
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Abstract
The invention discloses a kind of special respiratory assist system of tracheotomy, including: to trachea, it is used for connecting Medical air；Fibre sleeving, main body is the tubular structure with given length that hydrophilic fibre makes, and external diameter is identical with to the internal diameter of trachea, by through sewing to tracheal strips wall to the hydrophilic sewing thread of trachea tube wall；Water jacket, is sleeved on matchingly and sets on the pipeline section of fibre sleeving to tracheal strips, by two ends sealing-in and to forming water cavity between trachea；Water pipe, connects described water jacket, for for supplying water to water jacket；And bushing connection, telescopic joint for one end and the artificial larynx of trachea.It is capable of persistence humidifying according to the present invention, and this auxiliary device has preferable controllability.
Description
Technical field
The present invention relates to a kind of special respiratory assist system being applied to Pipe Cutting otomy.
Background technology
Tracheotomy (Traceotomy) is incision cervical trachea, puts into such as metal tracheal casing pipe, and laryngeal dyspnea, breathing function be not normal or dyspneic a kind of common surgical caused by lower respiratory tract ischesis to release for tracheotomy.Require that clinicist all should grasp this rescue technical ability.Therefore, tracheotomy is the most universal.
One of subject matter that tracheotomy is run into is that patient loses humidification function after tracheotomy, is easily generated the complication such as airway obstruction, pulmonary atelectasis and secondary infection.Generally, sufficient air flue humidification can play antiinflammatory solution and stick, and dilutes sputum, and keeps the effect of respiratory smooth.Generally speaking having the requirement that comparison is high to ward environment, such as, keep ward clean air circulation and it needs to keep suitable temperature range, make indoor air humidity maintain 60% ~ 70%, strict restriction is stayed in the ward to look after the patient night and day and visiting personnel.
Outside in addition to keeping suitable ward environment, generally also need to air flue is done special humidifying, it is however generally that, an every 2-6 hour patient needs humidification fluid of Neulized inhalation, each 15 minutes, in order to keep respiratory tract to moisten, is beneficial to secretions and gets rid of.Furthermore it is exactly intermittent instillation humidification fluid in patient airway, every 15 to 30 minutes once, each 1-2 milliliter, finally also need to cover such as double-deck wet gauze at the sleeve opening of artificial larynx, to play humidifying effect, it is possible to prevent the microorganism in room air, dust etc. from entering air flue.
Above-mentioned air flue humidification method has universality, but its role is limited, and patient as the aforementioned sucks the humidification fluid of each 15 minutes, it is impossible to the most lasting provides protection for patient.For another example humidification fluid is instilled, it is possible to patient can be caused to choke water, or be directly inhaled by a patient pulmonary, not have lasting humidifying effect, it is also possible to patient can be produced injury.
For the use of double-deck wet gauze, although easy to use, but owing to wet gauze is directly exposed in air, also easy breed bacteria in the environment of warm moist.
Chinese patent literature CN203763612U discloses a kind of Medical gas-pipe and cuts sleeve cap, really it is used in artificial larynx i.e. aforesaid metal tracheal casing pipe, it has a columnar cap shell, this cap shell one end is for being connected with such as metal tracheal casing pipe, the other end is then provided with hatband and filter screen, thus, the air passed in and out at this end can carry out filtering and wetting by filter screen, and filter screen uses permeability and water-retention material of good performance, to improve water resistance, substantially may be considered the deformation of double-deck wet gauze referred to above, belong to same humidifying mode, humidifying ability carrying out over time can change, humidifying performance is uncontrollable.
In some applications, directly use nebulizer to keep lasting humidifying, such as Chinese patent literature CN203989326U, CN203989325U, concrete such as the latter, it connects a connecting tube at the fog outlet of a nebulizer, the other end of connecting tube connects has one to provide, by nebulizer, connecting tube, anastomotic stoma, the air moistened to such as metal tracheal casing pipe in order to the anastomotic stoma being connected with metal tracheal casing pipe, oxygen, can solve the persistent problem of humidifying.But, the nebulizer i.e. medical vaporizer of artificial larynx can be applied to, produced atomizing particle is bigger, it is mainly used in the atomization of medicine, thus is supplied to the medicine of patient's doses, comparatively speaking, atomizing particle and atomization quantity the biggest (minimum nebulizer atomization quantity regulation is difficult or can not accurately adjust), beyond the actual demand of patient, even if turning atomization ability down, atomizing particle problem bigger than normal still can not get solving.The atomizing particle water smoke that easily causes bigger than normal condenses on the sleeve pipe of such as metal material, is not the water smoke required for patient.
Summary of the invention
In view of this, it is an object of the invention to provide one can be fine and glossy to sucking gas persistence, thus the special respiratory assist system of tracheotomy realizing persistence humidifying, and this auxiliary device has preferable controllability.
The present invention is by the following technical solutions:
A kind of special respiratory assist system of tracheotomy, including:
To trachea, it is used for connecting Medical air；
Fibre sleeving, main body is the tubular structure with given length that hydrophilic fibre makes, and external diameter is identical with to the internal diameter of trachea, by through sewing to tracheal strips wall to the hydrophilic sewing thread of trachea tube wall；
Water jacket, is sleeved on matchingly and sets on the pipeline section of fibre sleeving to tracheal strips, by two ends sealing-in and to forming water cavity between trachea；
Water pipe, connects described water jacket, for for supplying water to water jacket；And
Bushing connection, telescopic joint for one end and the artificial larynx of trachea.
Can be seen that from the above, according to the present invention, to tracheal strips, one section fibre set is set, this fibre sleeving is that hydrophilic fiber makes, and sewed on trachea by hydrophilic single, the most again in this section to overlapping a water jacket formation water cavity on trachea, fed water by fiber alignment fibre sleeving, such that it is able to moisten by the gas of fibre sleeving.Owing to the produced pin hole of sewing has certain restoring force, and will not confluent is uncontrollable pours in trachea, the control of the water yield then can be controlled by hydraulic pressure, and the control of hydraulic pressure is the simplest, such as use a transfusion bottle, the height having only to adjust transfusion bottle just can convert hydraulic pressure, therefore can not only keep lasting humidifying, and have preferable controllability.
The special respiratory assist system of above-mentioned tracheotomy, in order to obtain preferable humidifying effect under conditions of fibre sleeving is shorter, is formed with the hydrophilic fibre group being connected with fibre sleeving in described fibre sleeving, makes the voidage in fibre sleeving 96.0% ~ 99.5%.
Further, the fiber in described hydrophilic fibre group starts from described fibre sleeving and constitutes extension fiber, by constructing complete water delivery chain, improves the effect of humidifying.
Preferably, the distribution of lengths interval of described extension fiber is [1.5D, 3D], and wherein D is the internal diameter of fibre sleeving, and the manufacturability making extension fiber is preferable, and cost of manufacture is low, and can reach preferable humidifying effect.
Through checking, a length of 8 ~ 12 centimetres of described fibre sleeving, also being able to meet preferable humidifying effect even if being not provided with extending fiber, under conditions of being provided with extension fiber, the length of fibre sleeving can be shortened.
Preferably, for controlling cost, described hydrophilic fibre is cotton or numb.
It is being also associated with one with the chemical feed pipe of plug, when needs dosing, carrying out dosing by this chemical feed pipe, and not affecting patient breaths to the end of trachea.
The axis of described chemical feed pipe becomes the angle of 15 degree to 45 degree, beneficially dosing with to the axis of trachea.
The main body of described bushing connection is a right-angle elbow pipe, one of two tube heads of this right-angle elbow pipe are used for connecting sleeve pipe and mating and have sleeve connector port, and have sputum suction hole on wall relative with sleeve connector port on direct bend pipe, correspondingly, it is provided with plug for this sputum suction hole stifled, can be beneficial to carry out suction sputum operation.
For convenience of operation, described sputum suction hole is opened on corresponding wall on the cylindrical sputum suction hole seat formed.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the special respiratory assist system of a kind of tracheotomy according to the present invention.
Fig. 2 is the structural representation that the special respiratory assist system of a kind of tracheotomy is cut open at water jacket.
Fig. 3 is the structural representation of a kind of tracheotomy respiratory assist system.
In figure: 1. plug is stifled, 2. sputum suction hole seat, 3. horizontal tube, 4. chemical feed pipe, 5. plug, 6. sealed portion, 7. water jacket, 8. water pipe, 9. sealed portion, 10. liquid bottle, 11. give trachea, 12. sleeve connector port, 13. vertical tubes, 14. water cavities, and 15. extend fiber, 16. fibre sleevings
Detailed description of the invention
With reference to Figure of description 1, in figure, such as giving trachea 11 is not strict being drawn to scale, but in order to meet the diagram clearly on less drawing.
When constituting merely the element of the special respiratory assist system of tracheotomy to trachea 11, can be shorter one section pipe, can the most additionally connect such as oxygen hose etc..
In certain embodiments, select medical plastic sebific duct such as to trachea 11, possess certain pliability, be also beneficial to the realization of " sewing " as described in the present invention.
Such as water jacket 7 is also adopted by medical plastic sebific duct, forms two ends sealing-in by the sealed portion 6 shown in figure, sealed portion 9, thus to forming " capsule ", in other words water cavity 14 on trachea.
Such as sealed portion 6, is not offered as the parts that it is individualism, in the processing technology of plastic pipe goods, this " capsule " often by specific technique disposal molding it can be understood as described sealed portion 6 and sealed portion 9 are integrative-structures with water jacket 7.
See the special respiratory assist system of a kind of tracheotomy shown in Figure of description 1-3, its basic structure should include one to trachea 11, for connecting Medical air, should to trachea 11 can be simple belong to the special respiratory assist system of this tracheotomy, and there is relatively small length, the most cost-effective, it is beneficial to packed and transported, on the other hand, hospital is generally furnished with the oxygen hose of given length, it is not necessary to row makes longer to trachea 11 again.
Certainly, in certain embodiments, can use prefabricated longer to trachea 11, such as adult, can use about 1 meter to trachea 11, for child, accompanying and attending to and clasping for the beneficially head of a family, use 1.5 meters ~ 2 meters to trachea 11.
Then in trachea 11, sew a section fibre set 16, the main body of this fibre sleeving 16 is the tubular structure with given length that hydrophilic fibre makes, it is similar to having installed a liner additional to a certain section in trachea 11, this liner is arranged on to trachea 11 by the way of sewing, so, it is the formation of water transport channel, only this water transport channel clogging by relative close by the produced hole of sewing.
The tightness degree clogged depends on the wall thickness to trachea 11 and the material to trachea 11, such as material, and material is different, and its resilience can be variant, and the degree that sewing thread is extruded will be different, thus produce different abilities resistant to pressure.Will also realize that according to this, carrying capacity can be converted by changing hydraulic pressure.
For another example wall thickness, when wall thickness is blocked up, the produced gap of sewing may be made up completely, has actually constituted tight water-stop.
Certainly, the most medical general wall thickness of plastic pipe being used for directly supplying for patient is the thickest, will be typically less than 1 millimeter, mostly in 0.5 millimeter, can be effectively controlled impact produced by water delivery and be unlikely to be formed tight water-stop, also be beneficial to sewing.
The wall of fibre sleeving 16 itself has certain breathability, when gas circulates wherein, is not simply axially to flow, often produces eddy current, turbulent flow, thus can be directly impinging the wall of fibre sleeving 16；It addition, one section residing for fibre sleeving 16 itself can utilize the volatilization of moisture to produce certain steam atmosphere, thus, generally speaking, relatively good humidifying effect can be produced accordingly.
Further, the external diameter of fibre sleeving 16 is identical with to the internal diameter of trachea 11, is beneficial to be incorporated into the inwall to trachea 11, in this programme, by through sewing to tracheal strips wall to the hydrophilic sewing thread of trachea 11 tube wall.Utilize the hydrophilic of hydrophilic fibre, be relatively easy to produce aqueduct, thus ensure that fibre sleeving 16 possesses required humidity.
In FIG it can further be seen that be additionally provided with water jacket 7, it is sleeved on matchingly on the pipeline section setting fibre sleeving 16 in trachea 11, by two ends sealing-in and to forming water cavity 14 between trachea 11, sees Fig. 3.
Being shown as water jacket 7 and fibre sleeving 16 in figure, and give trachea 11 coaxial line, be only intended to clearly express, it addition, the production method of preferred coaxial line during actual fabrication, certainly, all have preferable pliability due to three, so-called coaxial line cannot be kept.
It addition, such as relation between sealed portion 6 and water jacket 7 in figure, being not offered as both is to separate, but separately draw to understand the structure in diagram water jacket 7.
Configure a water pipe 8 for described water jacket 7, connect described water jacket 7, water supply set 7 water supply；Possibly together with a liquid bottle 10 in figure, it is expressed as providing to water jacket 7 water source of liquid, such as transfusion bottle or water pocket etc. can be used, directly use the mode of hanging to use.
About the hanging height of such as liquid bottle 10, can be determined by test, and provide empirical data, with low cost, the most beneficially large-scale promotion.
In certain embodiments, can carry out to the control of air humidity degree to use the form of man-machine interaction, give the left end of trachea 11 the most in FIG, in other words at the tract of water jacket 7, a humidity sensor is set, and configures digital display and indicate, carry out humid control intuitively, high expensive, it is possible to use, but do not recommend.
In actual application, it is recommended to use empirical data.
Additionally, those skilled in the art perhaps thinks that differences such as there may be such as ambient temperature within the hospital affects the activity of water, it is to be understood that, use the patient of artificial larynx to be mostly positioned in the ward possessing controlled room temperature, therefore, the problem of ambient temperature effect can be ignored.
In the construction shown in fig. 1 possibly together with bushing connection, telescopic joint for one end and the artificial larynx of trachea 11, thus the medical gas of certain humidity it is provided with for patient.
Due to the controllability of the water quality at water source, therefore, generally speaking, quality problem is not being stated in this programme.
In a preferred embodiment, in described fibre sleeving 16, it is formed with the hydrophilic fibre group being connected with fibre sleeving 16, makes the voidage in fibre sleeving 96.0% ~ 99.5%.
When hydrophilic fibre group is wetted, saturated steam can be become by gas therebetween or meet the gas of certain humidity requirement, thus meeting the needs of humidifying.
The existence of hydrophilic fibre group can sufficiently improve the contact area of hydrophilic fibre part and gas.
It addition, hydrophilic fibre group can not be too tight, otherwise flow resistance can be excessive, and affects the eupnea of patient.Through checking, the voidage of hydrophilic fibre group cannot be below 85%, in order to reduce its impact, is limited in not less than 96.0%, and preferably 98.5%, by its rational deployment, even if using the voidage of 99%, still possess preferable humidifying effect.
The problem that hydrophilic fibre group rational deployment is set forth below, it should be noted that hydrophilic fibre here " is rolled into a ball " and only represented the dough that fiber is constituted, only represents that it is the composition part that this auxiliary device exists.
In a preferred embodiment, the fiber in described hydrophilic fibre group does not use single structures to be attached on fibre sleeving 16, but is configured to start from the fiber head of described fibre sleeving 16, and constitutes extension fiber 15.
In some implementations, fibre sleeving 16 completes in advance, and the final fibre sleeving 16 of its wall ratio is the thickest, then utilizes the mode of such as plucking, pulls up out fiber from fibre sleeving, constitutes and extends fiber 15.Plucking typically uses the tusk with trickle tooth to be shaped.
The fiber being drawn out starts from fibre sleeving 16, and has preferable adhesive force, it is possible to produce direct water transport channel.
Certainly, the fiber length distribution of pull-out is uneven, through checking, find the fibre length of pull-out, the distribution of lengths namely extending fiber 15 can have preferable humidifying effect in a rational interval, and voidage is higher, the most above the voidage of described more than 99%.
In a preferred embodiment, the distribution of lengths interval of described extension fiber 15 is [1.5D, 3D], and wherein D is the internal diameter of fibre sleeving 16, and voidage can accomplish 99.5%, the most still possesses good humidifying effect.
Further, a length of 8 ~ 12 centimetres of described fibre sleeving 16, when only having fibre sleeving 16, its length can be the longest, and selects 12 centimetres of neighbouring values, and under conditions of being configured with extension fiber 15, can be slightly shorter, and use the shorter fibre sleeving 16 of such as 8 centimeter length.
Recommend relatively short structure, it is simple to pack and transport.
About described hydrophilic fibre (hydrophilic fiber), refer to the fiber that regain is more than 4.5%, hygroscopicity is stronger, the most cotton or numb.There is on the macromolecular chain of this fibrid a number of more highly polar group (such as-OH ,-NH, C=O etc.), hydrogen bonded can be formed with hydrone.The marginal portion of its amorphous region and crystal region is relatively big, and molecular structure is the most loose, and hydrone easily gos deep in the slight void of fiber surface.
Hydrophilic fibre is of a great variety, and therefore, the hydrophilic fibre selection range being adapted to this programme is the widest.And known all natural fibers such as silkworm silk, the rabbit hair, camel hair, cotton, fiber crops etc., broadly fall into hydrophilic fibre.Regenerated fiber in staple fibre its chemical composition of such as viscose rayon is identical with cotton fiber, so falling within hydrophilic fibre.And all synthetic fibers such as terylene, chinlon, spandex, polypropylene, polyvinyl chloride fibre etc., broadly fall into non-hydrophilic fiber, also referred to as hydrophobic fibre.
One of typical feature of hydrophilic fibre is that its fabric can absorb water and can be timely by the discharge quickly of the water inhaled, this is also that to wear the clothes comfortableness of hydrophilic fibre why more preferable, reason lies also in the textile manufactured by hydrophilic fibre, the steam that human body is discharged can be distributed in time, make user be comfortable on, there is no bad impression stuffy, air-locked.
Utilize this attribute of hydrophilic fibre, convection current can carry out humidifying by the gas of fibre sleeving 16 in this programme.
Hydrophilic fibre price difference is bigger, and in order to control cost, this programme selects the relatively inexpensive cotton of price and fiber crops.Natural, those skilled in the art can also select other hydrophilic fibre, utilizes its general character.
In order to improve the adaptability of this auxiliary device, in the construction shown in fig. 1, it is also associated with one with the chemical feed pipe 4 of plug 5, when dosing, directly to be pushed by medicine by this chemical feed pipe 4 at the end to trachea 11.When not using, for chemical feed pipe 4 band upper plug head 5, close this chemical feed pipe 4.
For the benefit of dosing, the axis of described chemical feed pipe 4 becomes the angle of 15 degree to 45 degree, thereby reduces the air-flow impact on dosing with the axis to trachea 11.
See Figure of description 1 and accompanying drawing 2, the main body of described bushing connection is a right-angle elbow pipe, one of two tube heads of this right-angle elbow pipe are used for connecting sleeve pipe and mating and have sleeve connector port 12, in figure, this bushing connection is expressed as a vertical tube 13, for with telescopic joint, another is horizontal tube 3, for being connected with to trachea 11.During use, keeping to trachea is level herein, it is simple to pipe arrangement.
Lying on the back it addition, patient generally requires, with this understanding, vertical tube 13 has reasonable adaptability.
Further, and having sputum suction hole on wall relative with sleeve connector port 12 on direct bend pipe, Fig. 3 right-hand member has and indicates more clearly, correspondingly, is provided with plug stifled 1 for this sputum suction hole, after suction sputum, utilizes plug stifled 1 to block rapidly this sputum suction hole.
Seeing the right-hand member of Figure of description 3, described sputum suction hole is opened on corresponding wall on the cylindrical sputum suction hole seat 2 formed, and the operation making plug block up 1 has bigger space, it is to avoid interfere.
Claims (7)
1. the special respiratory assist system of tracheotomy, it is characterised in that including:
To trachea (11), it is used for connecting Medical air；
Fibre sleeving (16), main body is the tubular structure with given length that hydrophilic fibre makes, and external diameter is identical with to the internal diameter of trachea (11), by through sewing to tracheal strips wall to the hydrophilic sewing thread of trachea (11) tube wall；
Water jacket (7), is sleeved on on the pipeline section setting fibre sleeving (16) in trachea (11), by two ends sealing-in and to forming water cavity (14) between trachea (11) matchingly；
Water pipe (8), connects described water jacket (7), for for supplying water to water jacket (7)；And
Bushing connection, telescopic joint for one end and the artificial larynx of trachea (11)；
In described fibre sleeving (16), it is formed with the hydrophilic fibre group being connected with fibre sleeving (16), makes the voidage in fibre sleeving 96.0% ~ 99.5%；
Fiber in described hydrophilic fibre group starts from described fibre sleeving (16) and constitutes extension fiber (15)；
The distribution of lengths interval of described extension fiber (15) is [1.5D, 3D], and wherein D is the internal diameter of fibre sleeving (16).
The special respiratory assist system of tracheotomy the most according to claim 1, it is characterised in that a length of 8 ~ 12 centimetres of described fibre sleeving (16).
The special respiratory assist system of tracheotomy the most according to claim 1, it is characterised in that described hydrophilic fibre is cotton or numb.
The special respiratory assist system of tracheotomy the most according to claim 1, it is characterised in that be also associated with one with the chemical feed pipe (4) of plug (5) at the end to trachea (11).
The special respiratory assist system of tracheotomy the most according to claim 4, it is characterised in that the axis of described chemical feed pipe (4) becomes the angle of 15 degree to 45 degree with the axis to trachea (11).
The special respiratory assist system of tracheotomy the most according to claim 1, it is characterized in that, the main body of described bushing connection is a right-angle elbow pipe, one of two tube heads of this right-angle elbow pipe are used for connecting sleeve pipe and mating and have sleeve connector port (12), and on wall relative with sleeve connector port (12) on direct bend pipe, have sputum suction hole, correspondingly, it is provided with plug for this sputum suction hole stifled (1).
The special respiratory assist system of tracheotomy the most according to claim 6, it is characterised in that described sputum suction hole is opened on corresponding wall on the cylindrical sputum suction hole seat (2) formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001032.8A CN104491966B (en) | 2015-01-05 | 2015-01-05 | The special respiratory assist system of tracheotomy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510001032.8A CN104491966B (en) | 2015-01-05 | 2015-01-05 | The special respiratory assist system of tracheotomy |
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| CN104491966A CN104491966A (en) | 2015-04-08 |
| CN104491966B true CN104491966B (en) | 2016-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510001032.8A Expired - Fee Related CN104491966B (en) | 2015-01-05 | 2015-01-05 | The special respiratory assist system of tracheotomy |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3871373A (en) * | 1972-10-30 | 1975-03-18 | Richard R Jackson | Humidifying gas |
| CN202096566U (en) * | 2011-05-13 | 2012-01-04 | 浙江海圣医疗器械有限公司 | Disposable filter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3912795A (en) * | 1972-10-30 | 1975-10-14 | Richard R Jackson | Humidifying gas |
| SE414708B (en) * | 1972-11-06 | 1980-08-18 | Norabel Ab | DEVICE FOR HEATING AND HEATING THE INHALED AIR AT TRAKEOTOMIOCH ENDOTRAKEAL INTUBATION |
| US7428902B2 (en) * | 2004-12-15 | 2008-09-30 | Newport Medical Instruments, Inc. | Humidifier system for artificial respiration |
| ES2334168T3 (en) * | 2007-09-06 | 2010-03-05 | Ti-Li Chang | Tracheotomy tube with a rotating connector. |
| DE202008002152U1 (en) * | 2008-02-16 | 2008-05-15 | Neubauer, Norbert | Moist heat exchange device for the breathing air |
| CN103768693A (en) * | 2014-01-13 | 2014-05-07 | 孙华 | Anti-pollution double-layer airbag oral trachea cannula as well as preparation and application methods thereof |
-
2015
- 2015-01-05 CN CN201510001032.8A patent/CN104491966B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3871373A (en) * | 1972-10-30 | 1975-03-18 | Richard R Jackson | Humidifying gas |
| CN202096566U (en) * | 2011-05-13 | 2012-01-04 | 浙江海圣医疗器械有限公司 | Disposable filter |
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Granted publication date: 20161116 Termination date: 20180105 |