CN212090469U

CN212090469U - Noninvasive positive airway pressure mask with high-performance filtering function

Info

Publication number: CN212090469U
Application number: CN202020256217.XU
Authority: CN
Inventors: 黄桃; 徐钦
Original assignee: Chongqing Medical University
Current assignee: Sichuan Aixukang Medical Equipment Co., Ltd.
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-12-08
Anticipated expiration: 2030-03-02

Abstract

The utility model relates to a non-invasive positive pressure ventilation mask with high performance filtering function, which comprises a mask body, an air suction pipe connected with a respirator and an air expiration pipe connected with a PEEP regulating valve; the PEEP regulating valve comprises a knob, a spring, an expiration membrane and a connector in sequence from top to bottom; an air suction valve is arranged in the air suction pipe; a filter element for filtering aerosol is arranged in the expiration pipe; the exhaled gas discharges to the outside of face guard body after passing through filter core and PEEP governing valve in proper order. The scheme has the advantages that: the independent unidirectional flow of the gas in the mask body can be ensured when the patient exhales and inhales; the aerosol in the gas exhaled by the patient is efficiently filtered, so that the aerosol containing viruses/bacteria is blocked in the mask, the viruses/bacteria are prevented from being spread through the aerosol, and the risk of cross infection between medical care personnel and the patient and between the patient and the patient is reduced; the leakage amount of the mask is ensured to be within the safe air leakage compensation range of the respirator, so that man-machine confrontation is reduced.

Description

Noninvasive positive airway pressure mask with high-performance filtering function

Technical Field

The utility model belongs to the technical field of the medical instrument technique and specifically relates to a there is not malleation face guard of creating with high performance filtering capability.

Background

Noninvasive positive pressure ventilation refers to mechanical ventilation assisted by connecting a noninvasive ventilator to a patient via a mask, such as a nasal mask, oronasal mask, or full face mask. Noninvasive positive pressure ventilation is an important respiratory support technology for treating infectious diseases such as novel coronavirus pneumonia (COVID-19) and the like with respiratory failure. However, most of the existing noninvasive ventilators are single-circuit systems, and an exhalation valve is positioned on a face mask or between the face mask and a ventilator pipeline, so that in the process of noninvasive positive pressure ventilation treatment of infectious diseases, a patient inhales gas provided by the ventilator from an inhalation channel of the face mask and then directly discharges the exhaled gas of the patient outwards through the exhalation valve, and accordingly aerosol gas containing a large amount of viruses/bacteria is directly discharged into the ambient air. In a relatively confined ward, the concentration of virus/bacteria-carrying aerosols rises dramatically, with a high risk of cross-infection between healthcare workers and patients, and between patients in the ward.

Therefore, the invention designs a noninvasive positive pressure ventilation mask with a high-performance filtering function, so as to solve the problem of aerosol dispersion containing a large amount of viruses/bacteria generated by infectious disease patients when the noninvasive positive pressure ventilation technology is applied. Meanwhile, the leakage amount of the face mask is ensured to be within the safety air leakage compensation range of the respirator, and man-machine confrontation caused by overlarge leakage amount of the face mask is avoided.

Disclosure of Invention

The utility model aims at providing a there is not malleation ventilation face guard of creating with high performance filtering capability. The filter element is arranged at the position of the mask exhalation pipe, so that the aerosol in the exhaled gas of a patient is efficiently filtered, the aerosol containing a large amount of viruses/bacteria is blocked in the mask, and the viruses/bacteria are prevented from being spread through the aerosol when the noninvasive positive pressure ventilation technology is applied; the Positive End Expiratory Pressure (PEEP) regulating valve is arranged on the face mask, so that the leakage amount of the face mask is ensured to be within the safety air leakage compensation range of the respirator, and man-machine confrontation caused by overlarge leakage amount of the face mask is avoided.

In order to achieve the purpose, the utility model adopts the technical proposal that:

a noninvasive positive pressure ventilation mask with a high-performance filtering function comprises a mask body, an air suction pipe connected with a respirator, and an air expiration pipe connected with a PEEP regulating valve; the PEEP regulating valve comprises a knob, a spring, an expiration membrane capable of exhausting in one direction and a connector sleeved on a breathing tube from top to bottom in sequence; the connecting head is provided with a hollow bracket which is in threaded connection with the knob; the hollow connecting head is blocked and sealed by the expiration membrane; the knob is connected with the expiratory membrane through a spring, and the knob controls the expiratory membrane to balance the pressure provided by the respirator by adjusting the compression amount of the spring; an air suction valve is arranged in the air suction pipe; a filter element for filtering aerosol is arranged in the expiration pipe; the exhaled gas discharges to the outside of face guard body after passing through filter core and PEEP governing valve in proper order.

Adopt the technical scheme of the utility model, through set up the PEEP governing valve on the face guard body, utilize knob regulating spring's on the PEEP governing valve the compression volume, the spring provides the holding power for exhaling the diaphragm, make its balanced breathing machine conveyor gas to the outside pressure that promotes of exhaling the diaphragm, be favorable to controlling the face guard amount of losing heart, ensure that the face guard leaks the leakage amount and in breathing machine safety gas leakage compensation range, thereby avoid because of the too big patient breathing and breathing of breathing machine that leads to of face guard leakage amount not synchronous (man-machine confrontation promptly).

The filter core is installed on the expiration pipe of face guard body, makes the gas of patient's exhalation pass through the filter core earlier, keeps apart inside the face guard body the aerosol that the patient produced, prevents that virus/bacterium from passing through during aerosol direct discharge external environment, can reduce between medical personnel and the patient that are in the ward, the risk that cross infection appears between patient and the patient.

Preferably, the filter element comprises a cylindrical plug with a T-shaped section; a through hole is formed in the middle of the plug, and a filter screen is embedded in the through hole; the head of the plug extends into the expiration pipe; the tail part of the plug is abutted against the end face of the expiration pipe. The filter core can stretch into the inside of the expiration pipeline, and the occupied space is small.

Preferably, the head of the plug is provided with a thread; the plug is connected with the expiration pipe through threads. The disassembly and assembly are convenient. The filter element can be replaced regularly by adopting a screw connection mode, so that the phenomenon that the breathing resistance is overlarge due to long-term use of the filter element is prevented.

Preferably, a sealing ring is arranged between the tail part of the plug and the end face of the expiration pipe. The sealing performance of the plug is ensured, and the aerosol carrying viruses/bacteria is prevented from being discharged out of the mask body through gaps among the threads.

Preferably, the filter screen sequentially comprises three filter layers from outside to inside from the face mask; the first filter layer is an antistatic spunbond microfiber layer having a coating of electrically charged electrospun sub-micrometer fibers; the second filter layer is a melt-blown microfiber nonwoven layer; the third filter layer is a spunbond microfiber nonwoven layer. Through three-layer filtration, the filter effect is good.

Preferably, the PEEP regulating valve is marked with a pressure scale. Rotation of the knob causes the amount of compression of the spring to increase or decrease, resulting in a change in the support force provided by the spring to the expiratory membrane. The specific numerical value of the corresponding holding power of the rotation angle of the knob is visual, so that the mask and the respirator can be conveniently matched for use.

Preferably, the air suction valve comprises an air suction diaphragm for one-way air suction; the air suction diaphragm is fixed on the support frame in the air suction pipe and covers the air suction pipe opening in the mask. The independent unidirectional flow of the gas in the mask body is ensured during the exhalation and the inhalation.

The utility model has the advantages that aerosol in the face mask can be effectively prevented from being discharged outside the face mask, viruses/bacteria are prevented from being spread out of the face mask through the aerosol, and the risk of cross infection between medical care personnel and patients and between patients in a ward can be effectively reduced; the filter element is simple to disassemble and assemble, convenient to use and good in filtering effect; meanwhile, the filtering problem of aerosol is solved in the safety compensation range of the respirator by ensuring the leakage amount of the mask, and man-machine confrontation in the application of the noninvasive positive pressure ventilation technology is avoided.

Drawings

Fig. 1 is a schematic view of the external surface structure of the noninvasive positive airway pressure mask with high-performance filtering function of the present invention.

Fig. 2 is a schematic view of the cross-sectional structure of the non-invasive positive pressure ventilation mask with high performance filtering function of the present invention.

Fig. 3 is a schematic plan view of the inner surface of a noninvasive positive airway pressure mask with high performance filtering according to the present invention.

Fig. 4 is a schematic structural view of the valve cartridge.

Fig. 5 is a schematic diagram of the structure of the PEEP regulating valve.

FIG. 6 is a schematic diagram of an axial structure of the PEEP adjusting valve in the downward viewing direction.

The reference numerals and components referred to in the drawings are as follows:

the mask comprises a mask body 1, an inhalation tube 2, an exhalation tube 3, a PEEP regulating valve 4, a knob 41, a spring 42, an exhalation membrane 43, a connector 44, a flange 441, a bracket 45, a support platform 451, ribs 452, a limit strip 46, a positioning platform 461, a filter element 5, a plug 51, a head 511, external threads 512, a tail 52, a through hole 53, a filter screen 54, a first filter layer 541, a second filter layer 542, a third filter layer 543, a sealing ring 6 and an inhalation membrane 7.

Detailed Description

The invention will be further described with reference to the following examples and with reference to the accompanying drawings.

As shown in fig. 1 to 3, a noninvasive positive airway pressure mask with high performance filtering function comprises a mask body 1, an inhalation tube 2 connected with a respirator, and an exhalation tube 3 connected with a PEEP regulating valve 4; an air suction valve is arranged in the air suction pipe 2; a filter element 5 for filtering aerosol is arranged in the expiration pipe 3; the exhaled gas passes through the filter element 5 and the PEEP regulating valve 4 in sequence and then is discharged to the outside of the mask body 1.

As shown in fig. 4, the filter element 5 includes a cylindrical plug 51 with a T-shaped cross section; a through hole 53 is arranged in the middle of the plug 51, and a filter screen 54 is embedded in the through hole 53; the head 511 of the plug 51 extends into the expiration pipe 3; the tail 52 of the plug 51 abuts against the end face of the exhalation tube 3. In order to facilitate the disassembly and assembly, the head 511 of the plug 51 is provided with an external thread 512. An inner thread matched with the plug 51 is arranged on the inner side wall of the expiration pipe 3; the plug 51 is connected with the expiration pipe 3 through threads. In order to ensure the sealing effect, a sealing ring 6 is arranged between the tail part 52 of the plug 51 and the end surface of the expiration pipe 3.

In order to ensure the filtering effect, the filtering net 54 comprises three filtering layers from outside to inside in sequence; the first filter layer 541 is an antistatic spunbond microfiber layer having a coating of electrically charged electrospun sub-micrometer fibers; the coating may be comprised of microfibers, sub-micrometer fibers, nanofibers interwoven with partially gelled sub-micrometer fibers, or combinations thereof. The fiber coating may be electrostatically charged. The coated electrospun fibers can be polymeric fibers or polymeric fibers loaded with biocides such as silver, copper oxide, and the like. The second filter layer 542 is a meltblown microfiber nonwoven layer; the third filter layer 543 is a spunbond microfiber nonwoven layer. The coating can reduce the gaps among the fibers to achieve the protection level of N95. The three filter layers can intercept particles flowing in the gas through general mechanical action mechanisms such as inertial deposition, gravity deposition, Browner diffusion and the like, and can purify the air and kill common bacteria and viruses through electrostatic action, so that the whole filter screen 54 has the characteristics of low resistance, high efficiency, dust removal, sterilization and the like.

As shown in fig. 5 and 6, in order to adjust the positive end expiratory pressure, the PEEP adjusting valve 4 sequentially comprises, from top to bottom, a knob 41, a spring 42, an expiratory membrane 43 capable of discharging air in one direction, and a connector 44 sleeved on the breathing tube; the connector 44 is provided with a hollow bracket 45 which is in threaded connection with the knob 41, and the expiration membrane 43 seals the hollow connector 44; the membrane blocks the hollow connector 44; the knob 41 is connected to an expiratory membrane 43 via a spring 42, the knob 41 being pressed by the spring 42The amount of deflation, controlling the expiratory diaphragm 43 to balance the pressure provided by the ventilator. The pressure control range of the PEEP control valve 4 is 0cmH₂And (3) the leakage amount of the mask is controlled within the safety compensation range of the respirator (different non-invasive respirator leakage compensation values are different, and the leakage compensation values of most respirators are 60L/min) between the value O and the PEEP set value of the respirator (if the value of the PEEP regulating valve 4 is greater than the value of the PEEP set value of the respirator, the ventilation amount of the respirator is influenced), and if the leakage amount of the mask is greater than the leakage compensation value of the respirator, the respiration of a patient and the breathing of the respirator are asynchronous (namely, the man-machine confrontation). Thus, the PEEP regulator valve 4 serves to avoid man-machine interaction due to excessive mask leak.

Wherein, a flange 441 is formed at the upper part of the connecting head 44; a stop strip 46 is provided on the inside of the flange 441. The middle of the position-limiting bar 46 protrudes downward to form a hollow positioning table 461. This location platform 461 and exhale diaphragm 43 middle part convex reference column adaptation down, lead and spacing exhale diaphragm 43, guarantee that exhale diaphragm 43 can not drop at the removal in-process.

An upward mounting protrusion is formed in the middle of the expiratory membrane 43, and the lower end of the spring 42 is sleeved on the mounting protrusion and fixed with the expiratory membrane 43. The bracket 45 includes a support base 451 for screwing the knob 41; a plurality of ribs 452 are arranged on the upper side wall of the support platform 451 and are fixed with the flange 441 of the connector 44; the upper end of the spring 42 is fixed to the knob 41. The side wall of the support platform 451 is also marked with a pressure scale, and the scale is marked with a pressure value of 5cmH₂O、10cmH₂O、15mmcmH₂O、20cmH₂O, etc., to satisfy the quantitative regulation of positive end-expiratory pressure.

As can be seen from fig. 2, both ends of the exhalation tube 3 and the inhalation tube 2 extend out of the mask body 1; the PEEP regulating valve 4 is directly sleeved on the expiratory tube 3 outside the face mask through a connector 44; in order to avoid interference between the filter cartridge 5 and the PEEP regulating valve 4, the filter cartridge 5 in this embodiment is preferably mounted at the end of the exhalation tube 3 inside the face mask.

The air suction valve comprises an air suction diaphragm 7 for one-way air suction; the air suction diaphragm 7 is fixed on a support frame in the air suction pipe 2 and covers the opening of the air suction pipe 2 in the mask. In order to facilitate the installation, the end face of the air suction pipe 2 at the inner side of the mask is sealed by an air suction diaphragm 7; the air suction pipe 2 at the outer side of the mask is connected with a breathing machine through a pipeline. In order to ensure smooth breathing, the breathing resistance is caused by the filter element 5 arranged in the expiration pipe 3, and the diameter of the expiration pipe 3 in the embodiment is larger than that of the inspiration pipe 2.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and additions can be made without departing from the principles of the present invention, and these improvements and additions should also be regarded as the protection scope of the present invention.

Claims

1. A noninvasive positive pressure ventilation mask with a high-performance filtering function comprises a mask body (1), an air suction pipe (2) connected with a respirator, and an air expiration pipe (3) connected with a PEEP regulating valve (4); the PEEP regulating valve (4) sequentially comprises a knob (41), a spring (42), an expiration membrane (43) capable of exhausting air in a single direction and a connector (44) sleeved on a breathing pipe from top to bottom; a hollow bracket (45) is arranged on the connector (44) and is in threaded connection with the knob (41); the hollow connecting head (44) is blocked by the expiration membrane (43); the knob (41) is connected with the expiratory diaphragm (43) through a spring (42), and the expiratory diaphragm (43) is controlled to balance the pressure provided by the respirator by the knob (41) through adjusting the compression amount of the spring (42); an air suction valve is arranged in the air suction pipe (2); characterized in that a filter element (5) for filtering aerosol is arranged in the expiration pipe (3); the exhaled gas passes through the filter element (5) and the PEEP regulating valve (4) in sequence and then is discharged to the outer side of the mask body (1).

2. The noninvasive positive airway pressure mask with high-performance filtering function according to claim 1, characterized in that the filter element (5) comprises a cylindrical plug (51) with a T-shaped cross section; a through hole (53) is arranged in the middle of the plug (51), and a filter screen (54) is embedded in the through hole (53); the head (511) of the plug (51) extends into the expiration pipe (3); the tail part (52) of the plug (51) is abutted against the end face of the expiration pipe (3).

3. The noninvasive positive airway pressure mask with high-performance filtering function according to claim 2, characterized in that the head (511) of the bulkhead (51) is threaded; the plug (51) is connected with the expiration pipe (3) through threads.

4. The noninvasive positive airway pressure mask with high-performance filtering function according to claim 3, characterized in that a sealing ring (6) is arranged between the tail (52) of the plug (51) and the end face of the expiratory tube (3).

5. The noninvasive positive airway pressure mask with high-performance filtering function according to claim 2, characterized in that the filtering net (54) comprises three filtering layers from outside to inside; the first filter layer (541) is an antistatic spunbond microfiber layer having a charged electrospun sub-micron fiber coating; the second filtration layer (542) is a meltblown microfiber nonwoven layer; the third filter layer (543) is a spunbond microfiber nonwoven layer.

6. The noninvasive positive airway pressure mask with high-performance filtering function of claim 1, wherein the PEEP regulating valve (4) is marked with a pressure scale.

7. The noninvasive positive airway pressure mask with high-performance filtering according to claims 1-6, wherein the inhalation valve comprises an inhalation membrane (7) for unidirectional air intake; the air suction diaphragm (7) is fixed on a support frame in the air suction pipe (2) and covers the opening of the air suction pipe (2) in the mask.