CN216536465U - Controllable pressure breathing mask device - Google Patents
Controllable pressure breathing mask device Download PDFInfo
- Publication number
- CN216536465U CN216536465U CN202121574885.8U CN202121574885U CN216536465U CN 216536465 U CN216536465 U CN 216536465U CN 202121574885 U CN202121574885 U CN 202121574885U CN 216536465 U CN216536465 U CN 216536465U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure
- sealing
- mask body
- breathing
- 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.)
- Active
Links
Images
Landscapes
- Respiratory Apparatuses And Protective Means (AREA)
Abstract
The utility model discloses a controllable pressure breathing mask device, comprising: the mask comprises a mask body, a mask body and a mask body, wherein a breathing cavity capable of containing a nose and a mouth is formed in the mask body, and an expiration connecting pipe head and an inspiration connecting pipe head which are communicated with the breathing cavity are arranged on the outer wall of the mask body; the expiratory valve is detachably connected to the expiratory connecting pipe head; the air suction valve is detachably connected to the air suction connecting pipe head; and a plurality of fixing buckles arranged on the outer wall of the mask body. According to the controllable pressure breathing mask device, the pressure of the breathing cavity of the mask body is controlled by arranging the expiratory valve and the inspiratory valve together, so that the pressure of the breathing cavity can be kept stable in a certain range, and the controllable pressure breathing mask device can be used for treating patients with sleep apnea; in the utility model, the pressure spring is convenient to replace, so that the pressure range of the breathing cavity is adjustable; the utility model does not need components such as an airflow pipeline, a pump, a controller and the like, has simple structure, and has the advantages of portability, low cost, high comfort and the like.
Description
Technical Field
The utility model relates to the field of breathing masks, in particular to a pressure-controllable breathing mask device.
Background
Sleep apnea is a sleep disordered breathing that is compromised by: the sleep quality of the patient is affected slightly, and hypertension, cardiovascular diseases, diabetes, gastroesophageal reflux disease (GERD) and the like are caused seriously. The main symptoms of sleep apnea are expressed as snoring, which can affect other people to work and rest. Sleep apnea causes include primarily airway obstruction and central problems, both of which result in a reduced airflow into the patient's lungs.
The standard first-line treatment for OSAHS, in the guidelines for the diagnosis and treatment of obstructive sleep apnea-hypopnea syndrome (2011 revision), is Continuous Positive Airway Pressure (CPAP), with the apnea being significantly reduced by setting a 5-10cm pressure supply for obstructive sleep apnea using CPAP. [1] analysis of curative effect of patients with Zhi Ji super non-invasive positive pressure ventilation therapy obstructive sleep apnea syndrome [ J ]. China journal of metallurgy industry and medicine, 2020,37(02): 191-192; [2] Laiyizinetang ] observation of clinical curative effect of patients with noninvasive positive pressure ventilation therapy obstructive sleep apnea syndrome [ J ]. journal of world sleep medicine, 2019,6(09):1293-1295 [ [3] Guo Xiuhua, Chensi, von Silent, Wanna ] analysis of influence of noninvasive positive pressure ventilation therapy obstructive sleep apnea syndrome on sleep quality and nuclear factor-kB level [ J ]. Heilongjiang medicine, 2021,45(06):575-577+580 ].
Continuous Positive Airway Pressure (CPAP) machines, Automatic Positive Airway Pressure (APAP) machines and other devices are currently the main treatment means for sleep apnea, and they can ensure smooth breathing of patients during sleep, but some defects are unavoidable. These devices are generally composed of a mask, airflow conduits, pumps and controls, etc., and the relatively complex structure is associated with higher prices, which can result in devices that are not portable enough and conduits that can cause discomfort to the wearer.
A more reliable solution is now needed.
SUMMERY OF THE UTILITY MODEL
The present invention aims to solve the above-mentioned problems of the prior art and to provide a pressure-controllable breathing mask device.
In order to solve the technical problems, the utility model adopts the technical scheme that: a controllable pressure respiratory mask assembly comprising:
the mask comprises a mask body, a mask body and a mask body, wherein a breathing cavity capable of containing a nose and a mouth is formed in the mask body, and an expiration connecting pipe head and an inspiration connecting pipe head which are communicated with the breathing cavity are arranged on the outer wall of the mask body;
the exhalation valve is detachably connected to the exhalation connecting pipe head;
the air suction valve is detachably connected to the air suction connecting pipe head;
and a plurality of fixing buckles arranged on the outer wall of the mask body.
Preferably, expiratory valve and inspiratory valve all include the pressure valve body, the pressure valve body includes the valve casing, sets up support piece, slidable setting in the valve casing are in on the support piece and can follow the gliding piston rod of axial round trip, fixed connection in the valve casing seal post on the piston rod, set up be used for in the valve casing with seal post cooperation realizes sealed boss and cover establish the pressure spring on the piston rod, the pressure spring is right seal post is applyed the messenger seal post with the sealing washer is hugged closely in order to realize sealed pressure.
Preferably, the sealing boss is disposed inside the first end of the valve housing and integrally formed with the valve housing, and a through hole is formed in the middle of the sealing boss.
Preferably, the sealing column comprises a small column section and a large column section which are connected with each other, a step surface is formed between the small column section and the large column section, and the small column section can penetrate through the through hole under the pressure action of the pressure spring to enable the step surface to be in contact with the end surface of the sealing boss so as to realize sealing;
and a sealing ring is sleeved on the small column section at the joint of the large column section in a solid manner.
Preferably, the support member comprises a first support plate disposed at a first end of the valve housing and a second support plate disposed at a second end of the valve housing;
the two ends of the first supporting piece are connected with the first end of the valve shell, and the middle part of the first supporting piece is connected with a first guide sliding ring which is sleeved on the piston rod in a matched manner;
the two ends of the second supporting sheet are detachably connected with the second end of the valve casing, and the middle of the second supporting sheet is connected with a second guide sliding ring which is sleeved on the piston rod in a matching mode.
Preferably, the compression spring is located between the large column section of the sealing column and the second support sheet.
Preferably, the pressure spring is a tower-shaped pressure spring, a pressure spring mounting circular table is further arranged on the side portion of the large column section, a large-diameter end of the tower-shaped pressure spring is sleeved on the pressure spring mounting circular table in a matching mode, and a small-diameter end of the tower-shaped pressure spring is in contact with the second support sheet.
Preferably, the second end of the valve shell of the exhalation valve is connected with an exhalation valve threaded connector, and the exhalation valve threaded connector is in matched threaded connection with the exhalation connector head;
the first end of the valve casing of the air suction valve is connected with an air suction valve threaded connector, and the air suction valve threaded connector is in matched threaded connection with the air suction connector head.
Preferably, the mask body has a flexible edge that is adapted to fit against a person's face to seal the breathing chamber from the external environment.
Preferably, the fixing buckle is used for connecting a fixing band to fix the mask body on the face of a human body.
The utility model has the beneficial effects that:
according to the controllable pressure breathing mask device, the pressure of the breathing cavity of the mask body is controlled by arranging the expiratory valve and the inspiratory valve together, so that the pressure of the breathing cavity can be kept stable in a certain range, and the controllable pressure breathing mask device can be used for treating patients with sleep apnea;
in the utility model, the pressure spring is convenient to replace, so that the pressure range of the breathing cavity is adjustable; the utility model does not need components such as an airflow pipeline, a pump, a controller and the like, has a relatively simple structure, and has the advantages of portability, low cost, high comfort and the like.
Drawings
FIG. 1 is a schematic diagram of a controllable pressure breathing mask assembly according to the present invention;
FIG. 2 is a schematic diagram of another view of the controllable pressure respiratory mask assembly of the present invention;
FIG. 3 is a schematic diagram of a controllable pressure respirator assembly of the present invention with exhalation and inhalation valves removed;
FIG. 4 is a schematic view of an embodiment of a suction valve according to the present invention;
FIG. 5 is a schematic structural view of a pressure valve body of the present invention;
FIG. 6 is a schematic view of a suction valve according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of the exhalation valve of the present invention.
Description of reference numerals:
1-mask body; 2-an exhalation valve; 3-an air suction valve; 4-pressure valve body; 10-respiratory cavity; 11-expiratory connector head; 12-a suction connector head; 13-fixing a buckle; 14-a flexible edge; 20-expiratory valve nipple; 30-suction valve screwed joint; 40-a valve housing; 41-a piston rod; 42-a sealing column; 43-sealing boss; 44-pressure spring; 45-a first support sheet; 46 — a second support sheet; 400-a first end; 401 — second end; 402-limit stop; 403-connecting block; 404-screw; 405-a connection end; 420-small column section; 421-large column section; 422-step surface; 423-sealing ring; 424, a pressure spring mounting circular table; 450-a first guiding slip ring; 460 — second guiding slip ring.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the utility model with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
As shown in fig. 1 to 7, a controllable pressure breathing mask device of the present embodiment includes:
the mask comprises a mask body 1, wherein a breathing cavity 10 capable of containing a nose and a mouth is formed in the mask body 1, and an expiration connector 11 and an inspiration connector 12 which are communicated with the breathing cavity 10 are arranged on the outer wall of the mask body 1;
an exhalation valve 2 detachably connected to the exhalation connector head 11;
an air suction valve 3 detachably connected to the air suction connector head 12;
and a plurality of fixing buckles 13 arranged on the outer wall of the mask body 1.
Wherein the mask body 1 has a flexible edge 14, and the breathing cavity 10 is sealed from the external environment by the flexible edge 14 fitting with the face of the human body. In an alternative embodiment, the flexible edge 14 is made of silicone, which can maintain a good fit and seal with the area of the human body.
Wherein, fixed buckle 13 is used for connecting the fixed band to fix face guard body 1 at human face. In an alternative embodiment, the fixing buckle 13 is connected with an elastic fixing band, the mask body 1 is fixed by the elastic fixing band after being worn on the face of a human body, and the elastic function provided by the elastic fixing band enables the flexible edge 14 of the mask body 1 to keep good sealing with the face.
In this embodiment, most of the structures of the exhalation valve 2 and the inhalation valve 3 are the same, the exhalation valve 2 and the inhalation valve 3 both include a pressure valve body 4, the pressure valve body 4 includes a valve housing 40, a support member disposed in the valve housing 40, a piston rod 41 slidably disposed on the support member and capable of sliding back and forth in the valve housing 40 along the axial direction, a sealing post 42 fixedly connected to the piston rod 41, a sealing boss 43 disposed in the valve housing 40 and used for realizing sealing by matching with the sealing post 42, and a pressure spring 44 sleeved on the piston rod 41, wherein the pressure spring 44 applies a pressure to the sealing post 42 to enable the sealing post 42 to be tightly attached to the sealing ring 423 so as to realize sealing.
The sealing boss 43 is disposed inside the first end 400 of the valve housing 40 and is integrally formed with the valve housing 40, and a through hole (not shown) is formed in the middle of the sealing boss 43. Referring to fig. 4, the sealing boss 43 is formed to protrude rightward inside the first end 400 of the valve housing 40.
The sealing column 42 comprises a small column section 420 and a large column section 421 which are connected with each other, a step surface 422 is formed between the small column section 420 and the large column section 421, and under the pressure action of the pressure spring 44, the small column section 420 can pass through the through hole to enable the step surface 422 to be in contact with the end surface of the sealing boss 43 so as to realize sealing. Referring to fig. 4 and 5, the compression spring 44 exerts a leftward pressing force on the large column section 421, so that the step surface 422 is in close contact with the end surface of the sealing boss 43 to achieve sealing therebetween.
In a preferred embodiment, referring to fig. 5, a sealing ring 423 is fixedly sleeved on the small column section 420 connected with the large column section 421.
Wherein the support member comprises a first support tab 45 provided at a first end 400 of the valve housing 40 and a second support tab 46 provided at a second end 401 of the valve housing 40.
The two ends of the first supporting plate 45 are connected with the first end 400 of the valve housing 40, and the middle part of the first supporting plate 45 is connected with a first guiding slip ring 450 which is sleeved on the piston rod 41 in a matching manner.
The two ends of the second supporting piece 46 are detachably connected with the second end 401 of the valve housing 40, and the middle part of the second supporting piece 46 is connected with a second guiding sliding ring 460 which is sleeved on the piston rod 41 in a matching manner.
Referring to fig. 4, in an alternative embodiment, the second end 401 of the valve housing 40 has internal threads therein, the left end of the threads has a limit stop 402, the outer end of the second support plate 46 has external threads, and the second support plate 46 is in mating threaded connection with the interior of the second end 401 of the valve housing 40, thereby achieving a detachable connection.
Referring to fig. 6, in another alternative embodiment, the second end 401 of the valve housing 40 has a connection block 403 therein, and the second support plate 46 is connected to the connection block 403 by screws 404, thereby achieving a detachable connection.
The second support plate 46 is easily removable from the second end 401 of the valve housing 40, and the compression spring 44 can be easily replaced from that end after the second support plate 46 is removed.
Wherein, the pressure spring 44 is arranged between the large column section 421 of the sealing column 42 and the second supporting sheet 46, thereby providing pressure to the large column section 421. Referring to fig. 4-5, in a preferred embodiment, the compression spring 44 is a tower-shaped compression spring 44, a compression spring mounting boss 424 is further disposed on a side portion of the large column section 421, a large-diameter end of the tower-shaped compression spring 44 is fittingly sleeved on the compression spring mounting boss 424, and a small-diameter end of the tower-shaped compression spring 44 is in contact with the second support piece 46.
Referring to fig. 4, the suction valve screw connector 30 is connected to a first end 400 of the valve housing 40 of the suction valve 3, and the suction valve screw connector 30 is screw-engaged with the suction connector head 12. Referring to fig. 7, the second end 401 of the valve housing 40 of the exhalation valve 2 is connected with an exhalation valve threaded connector 20, and the exhalation valve threaded connector 20 is in matching threaded connection with the exhalation connector head 11. The expiratory valve 2 and the inspiratory valve 3 are both one-way valves and can only be opened in one way. In a preferred embodiment, the second end 401 of the valve housing 40 of the exhalation valve 2 is provided with a connection end 405 for threaded connection with the exhalation valve threaded connector 20, and the first end 400 of the valve housing 40 of the inhalation valve 3 is provided with a connection end 405 for threaded connection with the inhalation valve threaded connector 30, so that the detachable connection of the exhalation valve threaded connector 20, the inhalation valve threaded connector 30 and the valve housing 40 can be facilitated.
When the pressure in the breathing cavity 10 is in a set range, the breathing cavity is in a balanced state, at the moment, the exhalation valve 2 and the inhalation valve 3 are both in a closed state, and the sealing column 42 is tightly attached and sealed with the sealing boss 43;
referring to fig. 7, when a person wearing the breathing mask exhales, the exhaled air enters the breathing cavity 10 of the mask body 1, so that the air pressure in the breathing cavity is increased, the balance state is broken, the increased air pressure pushes the sealing post 42 and the piston rod 41 to slide rightwards, the pressure spring 44 is compressed, the sealing post 42 is separated from the sealing boss 43, the exhalation valve 2 is opened, part of the air is discharged out of the breathing cavity 10, after the initial balance state is recovered in the breathing cavity 10, the pressure spring 44 pushes the sealing post 42 to reset leftwards to be attached to the sealing boss 43 again, and the exhalation valve 2 is closed;
referring to fig. 6, when a person wearing the respiratory mask inhales, the inhaled air reduces the air pressure in the respiratory cavity 10, when the air pressure in the respiratory cavity 10 is lower than the atmospheric pressure in the external environment, and the pressure difference generates a rightward pressure on the sealing column 42 which is greater than a leftward pressure applied by the compression spring 44, so that the sealing column 42 and the piston rod 41 slide rightward, the compression spring 44 is compressed, the sealing column 42 is separated from the sealing boss 43, the inhalation valve 3 is opened, the external air enters the respiratory cavity 10, the air pressure of the respirator is restored to a balanced state, the sealing column 42 is attached to the sealing boss 43 again, and the inhalation valve 3 is closed, so that the pressure in the respiratory cavity 10 is kept within a certain pressure range.
For ease of understanding, the following further description is provided: when exhaling, the pressure in the breathing cavity 10 can be increased by the exhaled air and is higher than the atmospheric pressure, and when the pressure generated by the internal pressure-the pressure generated by the atmosphere > the elastic force of the pressure spring 44, the exhalation valve 2 is opened to exhaust the air until the equilibrium state 1, and then the pressure in the breathing cavity 10 at the equilibrium state 1 can be expressed as: p + a, P represents atmospheric pressure;
when breathing in, the gas in the breathing chamber 10 reduces, and atmospheric pressure reduces to be less than atmospheric pressure, until when the pressure that the pressure produced in the atmosphere-breathing chamber 10 produced > pressure spring 44 elasticity, inhalation valve 3 opens, and the external gas gets into, then face guard internal gas pressure resumes, inhalation valve 3 finally closes, marks as balanced state 2, and breathing chamber 10 internal gas pressure is less than atmospheric pressure during balanced state 2, then the atmospheric pressure in balanced state 2 breathing chamber 10 can be expressed as: P-A.
Therefore, the air pressure in the breathing chamber 10 can be controlled to fluctuate in the range of P-A to P + A, i.e., to fluctuate in ｃA small range from the atmospheric pressure. The value of a depends on the parameters of the compression spring 44, and the air pressure in the breathing chamber 10 can be controlled within a required range by selecting the compression spring 44 with a proper spring elastic coefficient. For example, in a preferred embodiment, the suitable air pressure in the breathing chamber 10 is a fluctuation of 5-10cm H above and below atmospheric pressure2O column, i.e. A is 5-10cm H2The pressure corresponding to the O-column is about 50 pascal to 100 pascal, and the appropriate compression spring 44 is selected according to the range, that is, the compression spring 44 is replaced to ensure thatThe value of A is 5-10cm H2Adjustable in O. For example, a pressure spring 44 having an elastic coefficient of 1.247N/m is compressed by 10mm, and the end value of the pressure control range obtained is 5cm H2O; a compression spring 44 with an elastic coefficient of 2.494N/m, compressed by 10mm, and the end value of the obtainable pressure control range is 10cm H2And (O). It should be understood that, the parameters such as the elastic coefficient and the compression stroke of the compressed spring 44 may be selected and combined according to the required air pressure control range by those skilled in the art, and the present invention is not limited in particular, and the key point of the present invention is to provide the structures of the exhalation valve 2 and the inhalation valve 3 capable of implementing such air pressure control function.
While embodiments of the utility model have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the utility model, and further modifications may readily be effected by those skilled in the art, so that the utility model is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.
Claims (9)
1. A controllable pressure respiratory mask assembly, comprising:
the mask comprises a mask body, a mask body and a mask body, wherein a breathing cavity capable of containing a nose and a mouth is formed in the mask body, and an expiration connecting pipe head and an inspiration connecting pipe head which are communicated with the breathing cavity are arranged on the outer wall of the mask body;
the exhalation valve is detachably connected to the exhalation connecting pipe head;
the air suction valve is detachably connected to the air suction connecting pipe head;
and a plurality of fixing buckles arranged on the outer wall of the mask body.
2. A controllable pressure respiratory mask assembly as claimed in claim 1, wherein the exhalation valve and inhalation valve each comprise a pressure valve body, the pressure valve body comprises a valve housing, a support member disposed in the valve housing, a piston rod slidably disposed on the support member and capable of sliding back and forth in the valve housing along an axial direction, a sealing post fixedly connected to the piston rod, a sealing boss disposed in the valve housing for cooperating with the sealing post to effect sealing, and a pressure spring fitted over the piston rod;
the sealing column comprises a small column section and a large column section which are connected with each other, a step surface is formed between the small column section and the large column section, and the small column section can penetrate through the through hole under the pressure action of the pressure spring to enable the step surface to be in contact with the end surface of the sealing boss so as to realize sealing;
a sealing ring is sleeved on the small column section at the joint of the large column section;
and the pressure spring applies pressure to the sealing column to enable the sealing column to be tightly attached to the sealing ring so as to realize sealing.
3. A controlled pressure respiratory mask assembly as claimed in claim 2, wherein the sealing boss is disposed within the first end of the valve housing and is integrally formed therewith, the sealing boss having a through-hole formed in a central portion thereof.
4. A controlled pressure respiratory mask assembly as claimed in claim 3, wherein the support member comprises a first support tab disposed at a first end of the valve housing and a second support tab disposed at a second end of the valve housing;
the two ends of the first supporting piece are connected with the first end of the valve shell, and the middle part of the first supporting piece is connected with a first guide sliding ring which is sleeved on the piston rod in a matching manner;
the two ends of the second supporting sheet are detachably connected with the second end of the valve casing, and the middle of the second supporting sheet is connected with a second guide sliding ring which is sleeved on the piston rod in a matching mode.
5. A controlled pressure respiratory mask assembly as claimed in claim 4, wherein the compression spring is located between the large post segment of the sealing post and the second support tab.
6. The pressure-controllable breathing mask device according to claim 5, wherein the pressure spring is a tower-shaped pressure spring, a pressure spring mounting circular table is further disposed on a side portion of the large column section, a large-diameter end of the tower-shaped pressure spring is fittingly sleeved on the pressure spring mounting circular table, and a small-diameter end of the tower-shaped pressure spring is in contact with the second support sheet.
7. A controllable pressure respiratory mask assembly as claimed in claim 6, wherein the second end of the valve housing of the exhalation valve is connected to an exhalation valve threaded connector that is matingly threaded with the exhalation connector head;
the first end of the valve casing of the air suction valve is connected with an air suction valve threaded connector, and the air suction valve threaded connector is in matched threaded connection with the air suction connector head.
8. A controlled pressure respiratory mask assembly as claimed in claim 1, wherein the mask body has a flexible rim by which the breathing chamber is sealed from the external environment by conforming to the human face.
9. The controllable pressure respiratory mask assembly as claimed in claim 1, wherein the fixing clip is used to connect a fixing band to fix the mask body on the face of a human body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121574885.8U CN216536465U (en) | 2021-07-12 | 2021-07-12 | Controllable pressure breathing mask device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121574885.8U CN216536465U (en) | 2021-07-12 | 2021-07-12 | Controllable pressure breathing mask device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216536465U true CN216536465U (en) | 2022-05-17 |
Family
ID=81537870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121574885.8U Active CN216536465U (en) | 2021-07-12 | 2021-07-12 | Controllable pressure breathing mask device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216536465U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521474A (en) * | 2021-07-12 | 2021-10-22 | 济南国科医工科技发展有限公司 | Controllable pressure breathing mask device |
| CN114701625A (en) * | 2022-06-06 | 2022-07-05 | 威海海洋职业学院 | Water-choking-proof life-saving device in water |
-
2021
- 2021-07-12 CN CN202121574885.8U patent/CN216536465U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521474A (en) * | 2021-07-12 | 2021-10-22 | 济南国科医工科技发展有限公司 | Controllable pressure breathing mask device |
| CN114701625A (en) * | 2022-06-06 | 2022-07-05 | 威海海洋职业学院 | Water-choking-proof life-saving device in water |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2695885C1 (en) | Individually adjustable face sealing element for respiratory device and individual adjustment method | |
| US4655213A (en) | Method and apparatus for the treatment of obstructive sleep apnea | |
| JP2019514542A (en) | Patient interface | |
| CN216536465U (en) | Controllable pressure breathing mask device | |
| US20060054169A1 (en) | Respiration nozzle for a medical facemask | |
| US10265495B2 (en) | Pressure actuated valve systems and methods | |
| US20100282262A1 (en) | Method and device for resuscitating a person in cardiac arrest condition | |
| WO2021022921A1 (en) | Positive pressure ventilation equipment | |
| CN113521474A (en) | Controllable pressure breathing mask device | |
| CN215995208U (en) | Patient interface | |
| US10576241B2 (en) | Breath powered positive airway pressure device | |
| CN220125291U (en) | patient interface | |
| CN208959032U (en) | A kind of CPAP generator and ventilator | |
| CN115399537A (en) | No-repeat suction type protective hood | |
| CN108744214A (en) | A kind of respirator for first aid | |
| CN209108334U (en) | A kind of severe medicine section breathes restorer | |
| CN208660092U (en) | A kind of noninvasive mask fixing device of wear-type | |
| CN212141112U (en) | Good-sealing smoke anaesthetic mask for anesthesia department | |
| CN211486107U (en) | Respiratory mask for medical intensive care therapy | |
| CN215461156U (en) | Improved respirator mask | |
| CN219231098U (en) | Breathing mask | |
| CN214286211U (en) | ICU ward auxiliary respiration device | |
| CN203989381U (en) | Ventilator mask | |
| US20230285706A1 (en) | Breathing mask and methods thereof | |
| CN219208566U (en) | Multifunctional breathing mask |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |