Mask system for inhibiting aerosol escape based on negative particles and use method thereof

Abstract

The invention provides a mask system for suppressing aerosol escape based on negative particles and a using method thereof. The mask system comprises a mask and a negative particle generating device. The mask comprises a mouth mask body, the mouth mask body comprises a mouth negative electricity particle interface, and the mouth negative electricity particle interface is connected to the negative electricity particle generating device. The negative particle generating device comprises a circuit board and a negative particle releasing plate, the negative particle releasing plate forms a plurality of discharging bodies, and the circuit board is connected with the negative particle releasing plate so that the discharging bodies can generate negative particles. And negative electricity particles generated by the negative electricity particle generating device can be introduced into the mouth mask body through the mouth negative electricity particle interface so as to promote aerosol to settle in the mask.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to a mask system based on negatively charged particles to suppress aerosol escape and a method of using the same. Background Art

[0002] During the examination and treatment of diseases related to the digestive tract and / or respiratory tract, high-intensity droplets / aerosols are easily generated. As the main transmission medium of respiratory infectious diseases, droplets / aerosols have the risk of causing infection to medical staff and patients. Endoscopic examination is one of the main diagnostic and treatment methods for digestive tract and / or respiratory diseases. During medical operations such as endoscopy, patients often need to wear masks. Existing masks usually use sealing, adsorption and other methods to passively prevent aerosols from escaping from the mask, which has great limitations.

[0003] In the prior art, the masks used for endoscopic examinations are mostly one-piece masks that fully cover the nose and mouth, and are provided with an inspection hole at the mouth for the endoscope tube to pass through. If the sealing between the inspection hole of the one-piece mask and the endoscope tube is too high, it may cause excessive air pressure inside the mask, affecting the doctor's operation of the endoscope tube, making it difficult to remove the endoscope tube, reducing the accuracy of endoscopic examination, etc. However, if a larger gap is formed between the inspection hole of the one-piece mask and the endoscope tube to facilitate the extension and retraction of the endoscope tube, the patient's oxygen concentration may be uncontrollable due to insufficient sealing of the mask, making it difficult to meet the patient's high-flow oxygen supply needs in critical situations, which poses certain safety hazards.

[0004] In particular, when patients undergo endoscopic examinations, they often have involuntary high-intensity breathing behaviors such as hiccups, snoring, and coughing, which may release aerosols / droplets with high concentrations of viruses. Especially for patients who are older, obese, have a short thyromental distance, have a high Mallampati grade, and may have difficulty with mask ventilation, they are more likely to have high-intensity breathing behaviors such as snoring due to the tongue root falling back and the collapse of the pharyngeal soft tissue after anesthesia. If the sealing performance of the one-piece mask is insufficient, medical staff may be continuously exposed for a long time; if the sealing performance of the one-piece mask is too high, viral droplets may accumulate in the mask for a long time, and inevitably release high-concentration viral aerosols during the extubation process, which may cause instantaneous close-range (usually within 1 meter) direct exposure of medical staff.

[0005] Although a one-way valve flap is provided on the mask in the prior art, it is mainly used to improve the ventilation efficiency of the patient, and no structural improvement is made to suppress aerosol overflow. Summary of the invention

[0006] This application is made in view of the above-mentioned state of the prior art. The purpose of this application is to provide a mask system based on negatively charged particles to suppress aerosol escape, which can form a local negatively charged particle environment near the mouth of a patient with a high risk of aerosol overflow, thereby reducing the risk of aerosol exposure for medical staff.

[0007] The present application also provides a method for using the above-mentioned mask system based on negatively charged particles to suppress aerosol escape.

[0008] The present application provides a mask system for suppressing aerosol escape based on negatively charged particles, which comprises a mask and a negatively charged particle generating device.

[0009] The mask comprises an oral mask body, the oral mask body comprises an oral negatively charged particle interface, and the oral negatively charged particle interface is connected to the negatively charged particle generating device.

[0010] The negatively charged particle generating device comprises a circuit board and a negatively charged particle releasing plate, wherein the negatively charged particle releasing plate forms a plurality of discharge bodies, and the circuit board is connected to the negatively charged particle releasing plate so that the discharge bodies generate negatively charged particles.

[0011] The negatively charged particles generated by the negatively charged particle generating device can be introduced into the oral mask body through the oral negatively charged particle interface to promote the aerosol to settle in the mask.

[0012] In at least one possible embodiment, the mask is a split mask, and the split mask further includes a nasal mask body, wherein the nasal mask body and the oral mask body are used to fit the wearer's face separately without being connected to each other.

[0013] The nose mask body includes a nose negatively charged particle interface, and the nose negatively charged particle interface is connected to the negatively charged particle generating device.

[0014] The negatively charged particles generated by the negatively charged particle generating device can be introduced into the nasal mask body through the nasal negatively charged particle interface to promote the aerosol to settle in the split mask.

[0015] In at least one possible embodiment, the negatively charged particle generating device further includes a concentration sensor.

[0016] The concentration sensor is arranged at the output port of the negatively charged particle generating device to monitor the concentration of the negatively charged particles output by the negatively charged particle generating device.

[0017] In at least one possible implementation, the negatively charged particle generating device further includes a display screen, and the display screen is connected to the concentration sensor to display a reading of the concentration sensor.

[0018] In at least one possible implementation, the negatively charged particle generating device further includes a fan, and the negatively charged particle releasing plate is further formed with a plurality of through holes to blow out an airflow containing negative ions.

[0019] In at least one possible embodiment, the mask system further includes a three-way pipe having a one-way valve.

[0020] The negatively charged particle generating device is connected to the nose negatively charged particle interface and the mouth negatively charged particle interface respectively via the three-way pipe.

[0021] The one-way valve can control the communication between the negatively charged particle generating device and the nasal mask and / or the oral mask.

[0022] In at least one possible embodiment, the negatively charged particle generating device further includes an automatic control system, wherein the automatic control system includes a particle sensor for controlling the operation of the negatively charged particle generating device by monitoring the concentration of the negatively charged particles delivered into the mask; and / or

[0023] The negatively charged particle generating device further comprises a timer for controlling the negatively charged particle generating device to automatically turn on and / or turn off.

[0024] In at least one possible implementation, the discharge body is a conical tip discharge body, and the material of the discharge body is carbon fiber.

[0025] In at least one possible embodiment, the concentration of the negatively charged particles output by the negatively charged particle generating device is 1.5×105 particles / cm 3 Up to 7.0×105 / cm 3 between.

[0026] The present application also provides a method for using a mask system based on negatively charged particles to suppress aerosol escape, which is applicable to the above-mentioned mask system based on negatively charged particles to suppress aerosol escape.

[0027] The method of use includes:

[0028] Wearing the oral mask and connecting the oral mask to other devices;

[0029] The negatively charged particle generating device is turned on, and the multiple discharge bodies of the negatively charged particle release plate generate negatively charged particles, and the negatively charged particles and the droplet nuclei are condensed and combined, so that the droplet nuclei are settled in the mask.

[0030] The release concentration of the negatively charged particles is monitored to control the operation of the negatively charged particle generating device.

[0031] The mask system and its use method based on negatively charged particles to suppress aerosol escape provided by the present application can form a local negatively charged particle environment near the mouth of a patient with a greater risk of aerosol overflow. By utilizing the coagulation effect of negatively charged particles on submicron particles, the aerosol escaping from the mouth area of ​​the mask can be reduced, thereby reducing the risk of aerosol exposure for medical staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a mask system according to one embodiment of the present application.

[0033] Figure 2 It is a schematic structural diagram of a split-type mask according to one embodiment of the present application.

[0034] Figure 3 It is a schematic diagram of the inner structure of a split mask according to an embodiment of the present application.

[0035] Figure 4 It is a schematic structural diagram of a nasal mask body according to one embodiment of the present application.

[0036] Figure 5 It is a schematic diagram of the structure of an oral mask body according to one embodiment of the present application.

[0037] Figure 6 It is a schematic diagram of the internal structure of the first inspection port accessory according to one embodiment of the present application.

[0038] Figure 7 It is a schematic structural diagram of another split-type mask according to an embodiment of the present application.

[0039] Figure 8 It is a schematic structural diagram of a second inspection port accessory according to one embodiment of the present application.

[0040] Fig. 9 It is a schematic structural diagram of a negatively charged particle generating device according to one embodiment of the present application.

[0041] Fig.10 It is a schematic diagram of the internal structure of a negatively charged particle generating device according to one embodiment of the present application.

[0042] Fig.11 It is a schematic structural diagram of a negatively charged particle release plate according to one embodiment of the present application.

[0043] Fig.12 The present invention is a flowchart of a method for using a mask system according to one embodiment of the present application.

[0044] Description of Reference Numerals

[0045] 100 Split Mask

[0046] 110 Nasal mask

[0047] 111 Oxygen tube interface

[0048] 112 Carbon dioxide monitoring interface

[0049] 113 Nasal Pressure Sensor

[0050] 114 Nose negatively charged particle interface

[0051] 115 Nose wearing connection

[0052] 116 Nose seal

[0053] 120 Mouth mask

[0054] 121 Endoscopic examination port

[0055] 122 Oral pressure sensor

[0056] 123 Oral Negatively Charged Particle Interface

[0057] 124 Mouth-mounted connector

[0058] 125 Mouth seal

[0059] 126 First inspection port accessories

[0060] 1261 Valve Structure

[0061] 1262 Collection Tank

[0062] 127 Second inspection port accessories

[0063] 1271 Filter

[0064] 130 Connectors

[0065] 200 Negatively charged particle generator

[0066] 210 Circuit Board

[0067] 220 Negatively charged particle release plate

[0068] 221 Discharge Body

[0069] 222 Through Hole

[0070] 223 Sensor through hole

[0071] 230 Concentration sensor

[0072] 240 Display

[0073] 251 Output hose

[0074] 252 Power cord

[0075] 300 Tee

[0076] 310 Valve DETAILED DESCRIPTION

[0077] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0078] The embodiment of the present application provides a mask system based on negatively charged particles to suppress aerosol escape (hereinafter, sometimes referred to as a "mask system"), such as Figure 1 As shown, the mask system may include a mask and a negatively charged particle generating device 200 .

[0079] Specifically, the mask 100 may be a split mask 100, such as Figure 2 and Figure 3 As shown, the split mask 100 may include a nasal mask 110 and an oral mask 120, which may be connected via a connector 130. The nasal mask 110 and the oral mask 120 may be used to fit the wearer's face respectively without being connected to each other, so that the nasal mask 110 and the oral mask 120 can work relatively independently without affecting each other.

[0080] The connector 130 may be a flexible connecting belt, a slot connection, a snap connection, a magnetic connection or the like. The flexible connecting belt may be a flexible and elastic material such as a cloth material or a rubber material. The slot connection may be designed with a slot interface on the nasal mask 110 or the oral mask 120. The snap connection may be designed with a buckle at the bottom of the nasal mask 110 and a clip at the top of the oral mask 120. The buckle and the clip may be made of the same material as the nasal mask and the oral mask and may be integrally formed. The magnetic connection may be designed with a coaxial male end component and a female end component at the connection portion between the nasal mask 110 and the oral mask 120. Exemplarily, the shape of the male end component and the female end component may be a circle with a diameter less than 5 mm, and the number may be 1-2. The male end component and the female end may be embedded in the surface of the nasal mask or the oral mask, and the male end component and the female end component may be wrapped with an insulating colloid. It can be understood that connecting the nasal mask 110 and the oral mask 120 using a connector 130 with a flexible, slotted, snap-fit, magnetic or other structure can facilitate the patient to wear the nasal mask 110 and the oral mask 120 at the same time when wearing the mask, and can also adjust the wearing position of the nasal mask 110 and the oral mask 120 according to the patient's facial features (the distance between the mouth and the nose, etc.).

[0081] In order to facilitate the description of the specific technical solutions of this embodiment, unless otherwise specified, Figure 2 and Figure 3 The posture of the split mask shown is used as a reference (here only for example, the patient wears the split mask in a standing posture) to define the "up and down" and "left and right" directions. The direction relatively close to the patient's face is the inner side, and the direction relatively far from the patient's face is the outer side. The above orientation definitions are not intended to limit the scope of this application.

[0082] Further, such as Figure 2 , Figure 3 and Figure 4 As shown, the nasal mask body 110 may include an oxygen inhalation tube interface 111, a carbon dioxide monitoring interface 112, a nasal pressure sensor 113 and a nasal negatively charged particle interface 114. The nasal mask body 110 may form an oxygen inhalation cavity, which may be a pear-shaped cavity structure with a narrow upper portion and a wide lower portion, and the structure may be well adapted to the patient's face (peri-nasal area). The oxygen inhalation tube interface 111 may be formed in the middle of the nasal mask body 110, and is used to connect (through a pipeline) an external oxygen supply device to supply oxygen to the nasal mask body 110. The carbon dioxide monitoring interface 112 may be formed near the middle of the nasal mask body 110, and may be formed above the oxygen inhalation tube interface 111 (closer to the nose to facilitate monitoring of nasal exhaled gas), and is used to connect an external carbon dioxide monitoring device to monitor the carbon dioxide content in the patient's exhaled gas, and thus monitor the patient's respiratory state. The nasal pressure sensor 113 can be disposed near the middle of the nasal mask body 110, and can be formed on one side of the oxygen inhalation tube interface 111 in the left and right directions ( Figure 2 and Figure 4 The nose negatively charged particle interface 114 can be formed near the middle of the nose mask 110, and in particular, can be formed on the other side of the oxygen inhalation tube interface 111 in the left-right direction ( Figure 2 and Figure 4 The left side in the figure) is used to connect the negatively charged particle generating device 200 to introduce negatively charged particles into the nasal mask 110 to create a negative ion environment in the nasal mask 110.

[0083] It can be understood that the oxygen inhalation tube interface 111, the carbon dioxide monitoring interface 112, the nasal pressure sensor 113, and the nasal negatively charged particle interface 114 are centrally arranged in the middle position of the nasal mask body 110, that is, when in use, the above components are close to the patient's nasal cavity, which can enhance the effect of each component. The nasal negatively charged particle interface 114 is close to the patient's nasal cavity, which is more conducive to promoting the aerosol deposition near the patient's nose by utilizing the coagulation effect of negative ions. The oxygen inhalation tube interface 111 can realize high-flow oxygen inhalation of the patient through an external oxygen supply device. High-flow oxygen inhalation can improve snoring caused by tongue root fall and pharyngeal soft tissue collapse after anesthesia, and reduce the generation of aerosols. The oxygen inhalation tube interface 111 and its connected external oxygen supply device, the carbon dioxide monitoring interface 112 and its connected external carbon dioxide monitoring device can reduce the safety risk of patients with high anesthesia risk of upper airway obstruction or upper airway obstruction, and the carbon dioxide monitoring interface 112 and its connected external carbon dioxide monitoring device can monitor the patient's respiratory state.

[0084] Further, such as Figure 2 , Figure 3 and Figure 5 As shown, the oral mask 120 may include an endoscopic inspection port 121, an oral pressure sensor 122 and an oral negatively charged particle interface 123. The oral mask 120 may form an endoscopic inspection cavity, which may be a hemispherical cavity (including an ellipsoidal shape) that can cover the oral area. The airflow (aerosol) exhaled from the patient's mouth will form a pressure loss in the oral mask 120, and local high-intensity turbulence may be formed near the endoscopic inspection port 121, which may increase the sedimentation rate of large-particle virus aerosols on the inner wall of the cavity. The endoscopic inspection port 121 may be formed in the middle of the oral mask 120 for passing endoscopic inspection equipment such as a gastroscope. The oral pressure sensor 122 may be arranged near the middle of the oral mask 120, and in particular, may be formed on one side of the endoscopic inspection port 121 in the left and right directions ( Figure 2 and Figure 5 The oral negatively charged particle interface 123 can be formed near the middle of the oral mask 120, and can be formed on the other side of the endoscope inspection port 121 in the left and right direction ( Figure 2 and Figure 5 ), is used to connect the negatively charged particle generating device 200 to introduce negatively charged particles into the mouth mask 120 to create a negatively charged particle environment in the mouth mask 120.

[0085] It can be understood that the mask system for suppressing aerosol generation of the present application can also include a pressure monitor used in conjunction with the nasal pressure sensor 113 and the oral pressure sensor 122 to monitor and output pressure changes in the mask.

[0086] It can be understood that the oral negatively charged particle interface 123 is closer to the patient's oral cavity, which is more conducive to the deposition of aerosols exhaled from the mouth. Due to the split design of the nasal mask body 110 and the oral mask body 120, the structure of the oral mask body 120 does not need to consider the patient's oxygen inhalation needs, that is, the oral mask body 120 does not need to set a sealing ring or other structures at the endoscopic inspection port 121, so as to facilitate the movement, entry and exit of endoscopic instruments, etc., which can improve the accuracy and convenience of doctors' endoscopic operations.

[0087] The negatively charged particle generator 200 can continuously generate negative DC high corona, emitting a large number of electrons (e-) at high speed. However, the electrons cannot exist in the air for a long time (the lifetime of electrons in the air is only nanoseconds), and will be immediately captured by oxygen molecules (O2) in the air, thereby forming negative ions (negatively charged particles / negatively charged polar particles). Negatively charged negative ions can combine with aerosols, viruses and bacteria in the air to form charged particles and naturally settle (coagulation), so that the aerosols are deposited inside the mask and are not easy to escape from the mask. Fig. 9 and Fig.10 As shown, the negatively charged particle generating device 200 may include a circuit board 210, a negatively charged particle releasing plate 220, a concentration sensor 230 and a display screen 240. It is understood that the negatively charged particles referred to in the present application include but are not limited to electrons, negatively charged single gas molecules, light ion clusters, charged aerosol particles and other types of negatively charged particles.

[0088] Specifically, the circuit board 210 can be connected to the negatively charged particle release board 220. The circuit board 210 can upgrade the input DC or AC power to AC high voltage power, and after rectification and filtering, the pure DC negative high voltage power can be output to the negatively charged particle release board 220. Exemplarily, the circuit board 210 may include components such as an LC oscillation circuit (resonance circuit), a high-voltage diode, a capacitor rectifier filter, etc. Fig.10 and Fig.11 As shown, the negatively charged particle release plate 220 may include a plurality of discharge bodies 221, and the discharge body 221 may be conical or pyramidal, that is, the discharge body 221 may be a conical tip discharge body. The discharge body 221 may generate a high corona under the action of a DC negative high voltage, and release a large number of electrons (negatively charged) at a high speed, and a large number of electrons may form a negative ion environment in the mask to promote aerosol precipitation. The discharge body 221 may be made of materials such as carbon fiber.

[0089] The concentration sensor 230 can be arranged near the output port of the negatively charged particle generator 200 to monitor the concentration of negatively charged particles output by the negatively charged particle generator 200. The concentration information of negatively charged particles monitored by the concentration sensor 230 can be displayed on the display screen 240. Exemplarily, the concentration sensor 230 can input the monitored signal into a controller such as a single-chip microcomputer through an A / D conversion module (converting an analog input signal into a digital output signal), and the controller determines whether the concentration of negatively charged particles meets the requirements. The negatively charged particle generator 200 can also include an automatic control system (including an automatic control system composed of the aforementioned circuit board, single-chip microcomputer, concentration sensor, etc.). Exemplarily, if the concentration of negatively charged particles exceeds the set upper threshold, the negatively charged particle generator 200 can be temporarily shut down; if the concentration of negatively charged particles is lower than the set lower threshold, the negatively charged particle generator 200 can be turned on and continuously operated until the concentration of negatively charged particles exceeds or equals the upper threshold.

[0090] Preferably, Fig.10 and Fig.11 As shown, the negatively charged particle release plate 220 may also form a plurality of through holes 222 for passing gas to facilitate the flow of gas to release negatively charged particles. Optionally, the negatively charged particle generating device 200 may also include a fan, which may blow out an airflow containing negative ions to promote the formation of a negative ion environment in the mask.

[0091] Preferably, Fig.10 and Fig.11 As shown, the negatively charged particle release plate 220 may further form a sensor through hole 223 for passing a connection line of the concentration sensor 230 .

[0092] In one experimental example, when the concentration of negatively charged particles was 1.5×10 5 Pieces / cm 3 ~7.0×10 5 Pieces / cm 3 Negatively charged particles have a significant effect on the condensation of particles with a particle size of ≤0.626μm (micrometer), which can effectively reduce the human respiratory exposure dose. Negatively charged particle concentration>7.0×10 5 Pieces / cm 3 When , the cost-benefit ratio of the coagulation effect does not change significantly. Therefore, the lower limit threshold of the negatively charged particle concentration can be set to 1.5×10 5 Pieces / cm 3 , the upper threshold is 7.0×10 5 Pieces / cm 3 .

[0093] like Fig. 9 and Fig.10As shown, the negatively charged particle generating device 200 may further include a solution output hose 251 and a power cord 252. The output hose 251 may be connected to the mask (split mask 100) to deliver the negatively charged particles generated by the negatively charged particle generating device 200 into the mask, thereby reducing the escape of respiratory and / or digestive tract aerosols from the mask. The output hose 251 may be a silicone hose, which may form a silicone seal with the nasal mask body 110 and the oral mask body 120, respectively, and may be plugged and unplugged in one direction.

[0094] Preferably, the negatively charged particle generating device 200 can be connected to the nasal negatively charged particle interface 114 of the nasal mask 110 and the oral negatively charged particle interface 123 of the oral mask 120 at the same time. It can be understood that the negatively charged particle generating device 200 can also be connected to the nasal mask 110 or the oral mask 120 alone, and in particular, can be connected only to the oral mask 120 with a larger aerosol concentration.

[0095] Preferably, Figure 1 As shown, the output hose 251 can be connected to the nasal mask body 110 and the oral mask body 120 through a three-way pipe 300 through a silicone hose. The three-way pipe 300 can be provided with a valve 310 for switching the specific connection form between the split mask 100 and the negatively charged particle generating device 200, that is, switching between connecting only the nasal mask body 110 alone, connecting only the oral mask body 120, and connecting the nasal mask body 110 and the oral mask body 120 at the same time. The valve 310 can be a one-way valve to prevent the liquid in the split mask 100 from flowing back.

[0096] Optionally, the negatively charged particle generating device 200 may also be provided with a timer. For example, a typical gastroscopy examination takes 5-10 minutes, and the timer may be set to automatically shut down the negatively charged particle generating device 200 15 minutes after it is turned on, thereby avoiding the doctor's additional workload caused by manually turning the device on and off.

[0097] Preferably, Figure 2 , Figure 3 and Figure 4As shown, the nasal mask 110 may also include a nasal wearing connection portion 115, a nasal seal 116 and an elastic band. The nasal mask 110 may include a plurality of nasal wearing connections 115, preferably, the nasal mask 110 may include two nasal wearing connections 115, and the two nasal wearing connections 115 may be respectively arranged on both sides of the bottom of the nasal mask 110. The two nasal wearing connections 115 may be respectively connected to the two ends of the elastic band, and the nasal mask 110 may be worn on the patient's head and / or neck through the elastic band. The nasal seal 116 may be arranged around the edge of the nasal mask 110, and in particular, may be arranged around the inner side of the edge of the nasal mask 110, so that the nasal mask 110 can be closely fitted to the patient's nose. The nasal seal 116 can enhance the sealing of the nasal mask 110 after wearing, reduce the escape of aerosol exhaled from the patient's nasal cavity, and at the same time, it can help adapt to the nasal characteristics of different patients, and enhance the patient's wearing comfort. Preferably, the nose seal 116 may be an airbag cushion, and in particular, may be an airbag cushion integrally formed of a medical polymer material (such as medical liquid silicone), which can reduce gas leakage in the nose mask body 110 .

[0098] like Figure 2 , Figure 3 and Figure 5 As shown, the oral mask body 120 may also include an oral wearing connection portion 124, an oral seal 125 and an elastic band. The oral mask body 120 may include a plurality of oral wearing connection portions 124. Preferably, the oral mask body 120 may include two oral wearing connection portions 124, and the two oral wearing connection portions 124 may be respectively arranged on both sides of the middle of the oral mask body 120. The two oral wearing connection portions 124 may be respectively connected to the two ends of the elastic band, and the oral mask body 120 may be worn to the patient's head and / or neck through the elastic band. The oral seal 125 may be arranged around the edge of the oral mask body 120, and in particular, may be arranged around the inner side of the edge of the oral mask body 120, so that the oral mask body 120 may be closely fitted to the patient's oral cavity. The oral seal 125 may enhance the sealing of the oral mask body 120 after wearing, reduce the escape of aerosol exhaled from the patient's oral cavity, and at the same time, it may help adapt to the facial features of different patients, and enhance the wearing comfort of the patient. Preferably, the mouth seal 125 may be an airbag rubber cushion, and in particular, may be an airbag rubber cushion integrally formed of a medical polymer material (such as medical liquid silicone), which can reduce gas leakage in the mouth mask body 120 .

[0099] Preferably, Figure 2 and Figure 3As shown, the nasal pressure sensor 113 and the oral pressure sensor 122 can be located on the same side of the split mask (for example, both located on the right side). The nasal negatively charged particle interface 114 and the oral negatively charged particle interface 123 can be located on the other side of the split mask (for example, both located on the left side). This arrangement can facilitate the oral mask body and the nasal mask body to form a pipeline connection with the external device respectively, and can avoid or reduce the crossing and tying of the connecting pipelines, so as to improve the convenience of operation and the aesthetics of the equipment.

[0100] like Figure 2 , Figure 7 As shown, the oral mask body 120 may further include an inspection port accessory, which may be combined with the oral mask body 120 (especially the endoscopic inspection port 121 thereof) by means of a snap (slot) connection, a threaded connection, a magnetic connection, or the like.

[0101] Preferably, the inspection port accessory can be selected as the first inspection port accessory 126 or the second inspection port accessory 127 according to the actual needs of the patient.

[0102] The first inspection port accessory 126 can be suitable for patients without potential mask ventilation difficulties and risk factors, that is, young and middle-aged patients with a body mass index (BMI) ≤ 26 kg / m 2 , thyroid-chin distance ≥ 8cm, and patients with anesthesia intubation difficulty airway classification standard (Mallampati) graded as grade I to II. The concentration of viral aerosols released during endoscopic examination in such patients is low, mainly due to the splashing of viral aerosol liquid on the tube wall during endoscopic tube removal. Figure 2 and Figure 6As shown, the first inspection port accessory 126 can be a hollow cone-like structure, which can include two cone-like structures (or bullet-like structures) that are sleeved. The outer top of the first inspection port accessory 126 (the part away from the wearer's mouth) (the top of the outer cone-like structure) can form a valve structure 1261, and the middle part of the valve structure 1261 can form an opening for passing endoscopic inspection equipment. The valve structure 1261 may include multiple valves (blades) for scraping liquid off the tube wall when the endoscope tube is removed. Exemplarily, the valve structure 1261 in this embodiment includes a total of five valves, and the five valves can be arranged adjacent to each other and partially overlap in sequence. When the endoscope tube is removed, the valve shape is at least partially in contact with the endoscope tube, and the airflow (aerosol) exhaled from the mouth can escape outward from the gap between the valves. The opening direction of the gap between the flaps can be consistent with or close to the radial direction of the endoscope tube. When the escaping airflow and aerosol enter and exit the gap between the flaps, multiple (for example, three) local pressure losses can be formed due to the change in flow path diameter and flow direction. In addition, the inertial collision, turbulent sedimentation and gravity deposition effects of the exhaled aerosol are greatly enhanced, so that the sedimentation rate of the exhaled aerosol on the outer wall of the endoscope tube and the inner surface of the flap structure is greatly increased compared with the conventional inspection port structure. A collection groove 1262 can also be formed between the inner and outer conical structures of the first inspection port accessory 126 (between the double-layer material), that is, the inner bottom of the first inspection port accessory 126 (the part close to the wearer's mouth) forms a collection groove 1262, and the flap structure 1261 can scrape the liquid on the tube wall into the collection groove 1262 when the endoscope tube is removed to prevent liquid reflux or splashing. Exemplarily, the wall thickness of the first inspection port accessory 126 can be 1 mm.

[0103] The second inspection port accessory 127 can be used for patients with potential mask ventilation difficulties and risk factors, i.e., older patients (greater than 55 years old) with a body mass index (BMI) greater than 26 kg / m 2 , thyromental distance <8cm, and the patient's airway grading standard (Mallampati) for the difficulty of anesthesia intubation is graded as above II. (For example, for an elderly patient, routine anesthesia assessment before endoscopy shows that the BMI index is 30kg / m 2 , and the thyromental distance is 5cm, Mallampati grading assessment level III, there is a high risk of difficulty in mask ventilation. ) Such patients may have problems such as tongue root falling back after anesthesia and pharyngeal soft tissue collapse leading to snoring during endoscopic examination. The concentration of viral aerosols released is relatively high. In addition to considering the splashing of viral aerosol liquid on the tube wall during the extubation of the endoscopic tube, the escape of viral aerosols during the endoscopic examination should also be considered. It is recommended to choose the second inspection port accessory 127. Figure 7 and Figure 8As shown, the second inspection port accessory 127 can be an hourglass-shaped (double funnel-shaped), that is, the diameter of the inside of the second inspection port accessory 127 (the part close to the wearer's mouth) gradually decreases from the inside to the outside, and the diameter of the outside of the second inspection port accessory 127 (the part away from the wearer's mouth) gradually increases from the inside to the outside (the inside and the outside are divided by the axial center of the second inspection port accessory 127). A through hole can be formed in the center of the second inspection port accessory 127 to allow the endoscope tube to pass through. The tapered design of the interior of the second inspection port accessory 127 can form local high-intensity turbulence in a limited space, which can increase the collision effect between large-particle virus aerosols and the wall, and increase the aerosol sedimentation rate. The gradually expanding design of the outside of the second inspection port accessory 127 can increase the pressure loss of the patient's exhaled airflow and effectively reduce the airflow velocity, so that large-particle virus aerosols settle to the inner wall of the outside under the action of gravity. As shown Figure 8 As shown, a filter 1271 may be provided inside the middle of the second inspection port accessory 127. Preferably, the filter 1271 may be a disposable filter cotton ring, which may be made of highly absorbent fiber with strong water absorption and low price, and may have a certain absorption and removal effect on the liquid on the wall of the endoscope tube and the patient's exhaled liquid, and may prevent the liquid from flowing back or splashing.

[0104] Preferably, the nasal pressure sensor 113 and the oral pressure sensor 122 can be respectively arranged on (attached to) the inner side (close to the face side) of the nasal mask 110 and the oral mask 120. The nasal pressure sensor 113 and the oral pressure sensor 122 can be flexible film pressure sensors, which are resistive pressure-sensitive sensors.

[0105] It can be understood that the mask system for suppressing aerosol generation provided in this embodiment can be applied to a variety of endoscopic examinations, including but not limited to gastroscopy, esophagoscopy, upper gastrointestinal endoscopy, etc. The mask system can also be widely used in various medical examinations, treatments, etc. that require suppression of exhaled aerosols from the respiratory tract and / or digestive tract.

[0106] The embodiments of the present application also provide a method for using a mask system based on negatively charged particles to suppress aerosol escape, such as Fig.12 As shown, it is applicable to the above-mentioned mask system based on negatively charged particles to suppress aerosol escape.

[0107] The negatively charged particle generator 200 may be a preset module set in the use environment. For example, before the general anesthesia endoscopic examination begins, the negatively charged particle generator 200 may be placed near the head of the patient on the examination bed. The silicone hose connected to the negatively charged particle generator 200 and the mask, as well as the nasal mask 110 and the oral mask 120 may be disposable items, or the nasal mask 110 and the oral mask 120 may be reusable items. Connect the relevant electrical equipment to the power supply.

[0108] Before the start of endoscopy under general anesthesia, the first inspection port accessories 126 (young and middle-aged, body mass index (BMI) ≤ 26 kg / m) can be selected according to whether the patient has potential risk factors for difficulty with mask ventilation. 2 , thyromental distance ≥ 8 cm, patients with anesthesia intubation difficulty airway classification standard (Mallampati) grading assessment of grade Ⅰ to Ⅱ) or second inspection port accessories 127 (older people, body mass index (BMI) > 26 kg / m 2 , thyromental distance <8cm, the patient's anesthesia intubation difficulty airway grading standard (Mallampati) grading assessment is grade II or above), and an endoscopic inspection port 121 connected to the inlet mask body 120.

[0109] Connect the nasal mask 110 and the oral mask 120. Put the nasal mask 110 and the oral mask 120 on the patient. When putting on the nasal mask 110, one hand holds the nasal mask 110 close to the nasal cavity, and the other hand pulls the wearing rope through the patient's head, and adjusts the wearing rope (for example, adjusts its buckle) to make the nasal mask 110 close (seal fit) and adapt to the patient's head circumference. The oral mask 120 fits the patient's mouth without the need for close fit. The wearing rope is worn around the neck and simply fixed.

[0110] The oxygen inhalation tube and the carbon dioxide monitoring tube of the oxygen inhalation device are connected to the oxygen inhalation tube interface 111 and the carbon dioxide monitoring interface 114 of the nasal mask 110 respectively. One end of the hose 220 of the negatively charged particle generator 200 is connected to the negatively charged particle interfaces (114, 123) of the nasal mask 110 and the oral mask 120, and the other end is connected to the negatively charged particle generator 200 (three-way interface). The sensor connection line is connected to the nasal pressure sensor 113 and the oral pressure sensor 122.

[0111] After the general anesthesia endoscopic examination begins, the negatively charged particle generator 200 is turned on, and the discharge body 221 of the negatively charged particle release plate 220 continuously generates negatively charged particles, which are transported to the nasal mask 110 and the oral mask 120 through the hose. The negatively charged particles are used to condense droplet nuclei with a particle size of ≤0.626μm, so that they settle on the inner wall of the split mask, which can effectively reduce the risk of aerosol escape. The built-in (near the output port) concentration sensor of the negatively charged particle generator can continuously monitor the concentration of negatively charged particles at the output port of the negatively charged particle generator, and can output the concentration value in real time through the display screen 240. When the concentration of negatively charged particles is lower than 1.5×10 5 Pieces / cm 3 When the concentration of negatively charged particles reaches 7.0×10 5 pt / cm 3 When the negatively charged particle generating device 200 is turned off;

[0112] During endoscopy under general anesthesia, the digestive tract mucus produced by the doctor inserting and removing the endoscope tube can be removed by the valve structure 1261 of the first inspection port accessory 126 or the filter 1271 of the second inspection port accessory 127 to reduce the risk of medical infection caused by mucus aerosolization when the tube is removed.

[0113] After the endoscopy under general anesthesia is completed, the connecting tube between the nasal mask 110 / oral mask 120 and the negatively charged particle generator 200 is unplugged, and the negatively charged particle generator is turned off.

[0114] It is understood that the order of the method for using the mask system based on negatively charged particles to suppress aerosol escape given above is exemplary, and some steps in actual operation can be omitted or the order can be changed. The following briefly describes some of the beneficial effects of the above-mentioned embodiments of the present application.

[0115] The mask system and its use method based on negatively charged particles to suppress aerosol escape provided by the present application can form a local negatively charged particle environment near the mouth of a patient with a greater risk of aerosol overflow. By utilizing the coagulation effect of negatively charged particles on submicron particles, the aerosol escaping from the mouth area of ​​the mask can be reduced, thereby reducing the risk of aerosol exposure for medical staff.

[0116] It is understood that in the present application, when the number of parts or components is not particularly limited, the number may be one or more, and the multiple here refers to two or more. For the case where the number of parts or components shown in the drawings and / or described in the specification is a specific number such as two, three, four, etc., the specific number is usually exemplary and not restrictive, and it can be understood as multiple, that is, two or more, but this does not mean that the present application excludes the case of one.

[0117] It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art may make various modifications and changes to the above embodiments under the guidance of the present application without departing from the scope of the present application.

Claims

1. A mask system based on negatively charged particles to suppress aerosol escape, characterized in that: It comprises a mask and a negatively charged particle generating device (200), The mask comprises an oral mask body (120), the oral mask body (120) comprises an oral negatively charged particle interface (123), and the oral negatively charged particle interface (123) is connected to the negatively charged particle generating device (200). The negatively charged particle generating device (200) comprises a circuit board (210) and a negatively charged particle releasing plate (220), wherein the negatively charged particle releasing plate (220) forms a plurality of discharge bodies (221), and the circuit board (210) is connected to the negatively charged particle releasing plate (220) so that the discharge bodies (221) generate negatively charged particles. The negatively charged particles generated by the negatively charged particle generating device (200) can be introduced into the oral mask body (120) via the oral negatively charged particle interface (123) to promote the aerosol to settle in the mask.

2. The mask system for suppressing aerosol escape based on negatively charged particles according to claim 1, characterized in that: The face mask is a split-type face mask (100), and the split-type face mask (100) further comprises a nasal mask body (110), wherein the nasal mask body (110) and the oral mask body (120) are respectively adapted to fit the face of the wearer without being connected to each other. The nose mask (110) comprises a nose negatively charged particle interface (114), and the nose negatively charged particle interface (114) is connected to the negatively charged particle generating device (200). The negatively charged particles generated by the negatively charged particle generating device (200) can be introduced into the nasal mask body (110) via the nasal negatively charged particle interface (114) to promote the sedimentation of aerosols in the split mask (100).

3. The mask system based on negatively charged particles to suppress aerosol escape according to claim 1, characterized in that: The negatively charged particle generating device (200) further comprises a concentration sensor (230), The concentration sensor (230) is arranged at the output port of the negatively charged particle generating device (200) to monitor the concentration of negatively charged particles output by the negatively charged particle generating device (200).

4. The mask system for suppressing aerosol escape based on negatively charged particles according to claim 3, characterized in that: The negatively charged particle generating device (200) further comprises a display screen (240), wherein the display screen (240) is connected to the concentration sensor (230) to display the reading of the concentration sensor (230).

5. The mask system for suppressing aerosol escape based on negatively charged particles according to claim 1, characterized in that: The negatively charged particle generating device (200) further comprises a fan, and the negatively charged particle releasing plate (220) is further formed with a plurality of through holes (222) for blowing out an airflow containing negative ions.

6. The mask system for suppressing aerosol escape based on negatively charged particles according to claim 2, characterized in that: The mask system further comprises a three-way pipe (300), wherein the three-way pipe (300) has a one-way valve (310). The negatively charged particle generating device (200) is connected to the nose negatively charged particle interface (114) and the mouth negatively charged particle interface (123) respectively via the three-way pipe (300). The one-way valve (310) is capable of controlling the communication between the negatively charged particle generating device (200) and the nasal mask (110) and / or the oral mask (120).

7. The mask system for suppressing aerosol escape based on negatively charged particles according to claim 1, characterized in that: The negatively charged particle generating device (200) further comprises an automatic control system for controlling the operation of the negatively charged particle generating device (200) by monitoring the concentration of the negatively charged particles transported into the mask; and / or The negatively charged particle generating device (200) further comprises a timer for controlling the negatively charged particle generating device to automatically turn on and / or turn off.

8. The mask system for suppressing aerosol escape based on negatively charged particles according to claim 1, characterized in that: The discharge body (221) is a conical tip discharge body, and the material of the discharge body (221) is carbon fiber.

9. The mask system for suppressing aerosol escape based on negatively charged particles according to claim 1, characterized in that: The concentration of the negatively charged particles output by the negatively charged particle generating device (200) is 1.5×10 5 Pieces / cm 3 to 7.0×10 5 Pieces / cm 3 between.

10. A method for using a mask system based on negatively charged particles to suppress aerosol escape, characterized in that: A mask system for suppressing aerosol escape based on negatively charged particles according to any one of claims 1 to 9, The method of use includes: Wearing the oral mask (120), and connecting the oral mask (120) to other equipment; The negatively charged particle generating device (200) is turned on, and the plurality of discharge bodies (221) of the negatively charged particle releasing plate (220) generate negatively charged particles, and the negatively charged particles and the droplet nuclei are subjected to a condensation effect, so that the droplet nuclei are deposited in the mask. The release concentration of the negatively charged particles is monitored to control the operation of the negatively charged particle generating device (200).

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