Mask system for inhibiting aerosol escape based on negative electric particle and use method therefor

Abstract

Provided are a mask system for inhibiting aerosol escape based on negative electric particles and a use method therefor. The mask system comprises a mask and a negative electric particle generation apparatus. The mask comprises a mouth mask body, which comprises a mouth negative electric particle interface. The mouth negative electric particle interface is connected to the negative electric particle generation apparatus. The negative electric particle generation apparatus comprises a circuit board and a negative electric particle releasing plate. The negative electric particle releasing plate forms a plurality of discharge bodies, and the circuit board is connected to the negative electric particle releasing plate, such that the discharge bodies generate negative electric particles. Negative electric particles generated by the negative electric particle generation apparatus can be introduced into the mouth mask body via the mouth negative electric particle interface to promote the settlement of aerosol in the mask.

Description

Mask system for inhibiting aerosol escape based on negative particles and method of using same TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and in particular to a mask system for inhibiting aerosol escape based on negative particles and a method of using same. BACKGROUND

[0002] During the examination and treatment of diseases related to the digestive tract and / or respiratory tract, high-intensity droplets / aerosols are extremely likely to be produced. Droplets / aerosols are the main transmission medium of respiratory infectious diseases, and have the risk of causing infection of medical staff and patients. Endoscopy is one of the main diagnostic and treatment methods for diseases of the digestive tract and / or respiratory tract. During medical operations such as endoscopy, patients often need to wear masks. Existing masks usually passively hinder the escape of aerosols from the mask by sealing and adsorbing, which has great limitations.

[0003] The masks used in the prior art for endoscopy are mostly one-piece masks that cover the nose and mouth. The one-piece mask is provided with an examination hole for the endoscope tube to pass through at the oral cavity. If the sealing between the examination hole of the one-piece mask and the endoscope tube is too high, it may cause the internal air pressure of the mask to be too large, affecting the operation of the endoscope tube by the doctor, causing the endoscope tube to be difficult to exit, and reducing the accuracy of endoscopy. However, if a larger gap is formed between the examination hole of the one-piece mask and the endoscope tube in order to facilitate the extension and retraction of the endoscope tube, the sealing of the mask may be insufficient, leading to uncontrollable oxygen concentration for the patient, making it difficult to meet the high-flow oxygen demand of the patient in critical situations, and having certain safety hazards.

[0004] In particular, when patients receive endoscopy, they often have involuntary high-intensity breathing behaviors such as hiccups, snoring, and coughing, which may release aerosols / droplets with high concentrations of viruses. In particular, for patients who are older, obese, have a short distance between the upper incisors and the chin, and have a high Mallampati classification, which may have difficulty in ventilation with the mask, after anesthesia, the tongue root may fall backward, and the soft tissues of the pharynx may collapse, making it more likely to have high-intensity breathing behaviors such as snoring. If the sealing 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 high-concentration viral aerosols may be inevitably released during extubation, which may cause medical staff to be directly exposed at a close distance (usually within 1 meter).

[0005] Although the prior art provides a one-way valve on the mask, it is mainly used to improve the ventilation efficiency of the patient, and does not have structural improvements for inhibiting the overflow of aerosols. SUMMARY

[0006] The present application is made in view of the above prior art status. The present application aims to provide a mask system based on negative particles to inhibit aerosol escape, which can form a local negative particle environment near the mouth of a patient with a high risk of aerosol overflow, thereby reducing the aerosol exposure risk of medical staff.

[0007] The present application also provides a method for using the above mask system based on negative particles to inhibit aerosol escape.

[0008] The present application provides a mask system based on negative particles to inhibit aerosol escape, which comprises a mask and a negative particle generating device,

[0009] The mask comprises a mouth cover, and the mouth cover comprises a mouth negative particle interface connected to the negative particle generating device.

[0010] The negative particle generating device comprises a circuit board and a negative particle release plate, the negative particle release plate forms a plurality of discharge bodies, and the circuit board is connected to the negative particle release plate to make the discharge bodies generate negative particles.

[0011] The negative particles generated by the negative particle generating device can enter the mouth cover through the mouth negative particle interface to promote the settlement of aerosol in the mask.

[0012] In at least one possible implementation, the mask is a split mask, and the split mask further comprises a nose cover, and the nose cover and the mouth cover are used to respectively fit the face of a wearer without being connected to each other.

[0013] The nose cover comprises a nose negative particle interface connected to the negative particle generating device.

[0014] The negative particles generated by the negative particle generating device can enter the nose cover through the nose negative particle interface to promote the settlement of aerosol in the split mask.

[0015] In at least one possible implementation, the negative particle generating device further comprises a concentration sensor.

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

[0017] In at least one possible implementation, the negative particle generating device further comprises a display screen connected to the concentration sensor to display the reading of the concentration sensor.

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

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

[0020] The negative particle generating device is connected to the nasal negative particle interface and the oral negative particle interface respectively via the three-way pipe,

[0021] The one-way valve can control the communication of the negative particle generating device with the nasal mask body and / or the oral mask body.

[0022] In at least one possible implementation, the negative particle generating device further comprises an automatic control system, which comprises a particulate matter sensor for controlling the operation of the negative particle generating device by monitoring the concentration of the negative particles delivered into the mask; and / or

[0023] The negative particle generating device further comprises a timer for controlling the automatic opening and / or closing of the negative particle generating device.

[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 implementation, the concentration of the negative particles output by the negative particle generating device is between 1.5 x 105 / cm 3 and 7.0 x 105 / cm 3 .

[0026] The application also provides a use method of the mask system based on negative particles for inhibiting aerosol escape, which is suitable for the mask system based on negative particles for inhibiting aerosol escape described above,

[0027] The use method comprises:

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

[0029] Turning on the negative particle generating device, the plurality of discharge bodies of the negative particle releasing plate generate negative particles, the negative particles have a coalescence effect with the nuclei of droplets, and the nuclei of droplets are settled in the mask,

[0030] Monitoring the release concentration of the negative particles to control the operation of the negative particle generating device.

[0031] The mask system based on negative particles for inhibiting aerosol escape and the use method thereof provided by the present application can form a local negative particle environment near the mouth of a patient with a high risk of aerosol overflow. By using the coagulation effect of negative particles on submicron particles, the aerosol escaping from the mouth area of the mask can be reduced, and the aerosol exposure risk of medical staff can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] FIG. 1 is a structural schematic diagram of a mask system according to an embodiment of the present application.

[0033] FIG. 2 is a structural schematic diagram of a split mask according to an embodiment of the present application.

[0034] FIG. 3 is a structural schematic diagram of the inner side of a split mask according to an embodiment of the present application.

[0035] FIG. 4 is a structural schematic diagram of a nose cover according to an embodiment of the present application.

[0036] FIG. 5 is a structural schematic diagram of a mouth cover according to an embodiment of the present application.

[0037] FIG. 6 is a structural schematic diagram of the internal structure of a first inspection port accessory according to an embodiment of the present application.

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

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

[0040] FIG. 9 is a structural schematic diagram of a negative particle generating device according to an embodiment of the present application.

[0041] FIG. 10 is a structural schematic diagram of the internal structure of a negative particle generating device according to an embodiment of the present application.

[0042] FIG. 11 is a structural schematic diagram of a negative particle release plate according to an embodiment of the present application.

[0043] FIG. 12 is a flowchart of a use method of a mask system according to an embodiment of the present application.

[0044] Reference numerals 100 split mask 110 nose mask body 111 oxygen tube interface 112 carbon dioxide monitoring interface 113 nose pressure sensor 114 nose negative ion interface 115 nose wearing connection part 116 nose sealing part 120 mouth mask body 121 endoscopy port 122 mouth pressure sensor 123 mouth negative ion interface 124 mouth wearing connection part 125 mouth sealing part 126 first port accessory 1261 flap structure 1262 collection groove 127 second port accessory 1271 filter 130 connecting part 200 negative ion generating device 210 circuit board 220 negative ion releasing plate 221 discharge body 222 through hole 223 sensor passing hole 230 concentration sensor 240 display screen 251 output hose 252 power cord 300 tee joint 310 valve DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that the specific description is only for teaching the best mode of the present application and is not intended to limit the scope of the present application.

[0046] The embodiments of the present application provide a mask system based on negative ion to inhibit aerosol escape, as shown in FIG. 1, which can include a mask and a negative ion generating device 200.

[0047] Specifically, the mask 100 can be a split mask 100, as shown in FIGS. 2 and 3, which can include a nose mask body 110 and a mouth mask body 120, and the nose mask body 110 and the mouth mask body 120 can be connected by a connecting part 130. The nose mask body 110 and the mouth mask body 120 can be used to fit the face of the wearer respectively and are not communicated with each other, so that the nose mask body 110 and the mouth mask body 120 can work relatively independently without affecting each other.

[0048] The connecting piece 130 can be a flexible connecting band, a slot connection, a buckle connection, a magnetic attraction connection, etc. The flexible connecting band can be a flexible and elastic material such as cloth or rubber. The slot connection can be designed on the nose cover 110 or the mouth cover 120. The buckle connection can be designed on the bottom of the nose cover 110 and the top of the mouth cover 120. The same material can be used for the nose cover and the mouth cover, and they can be integrally formed. The magnetic attraction connection can be designed on the connecting part of the nose cover 110 and the mouth cover 120. The shape of the male and female components can be a circle with a diameter of less than 5 mm, and the number can be 1-2. The male and female components can be embedded in the surface of the nose cover or the mouth cover, and the periphery of the male and female components can be wrapped with an insulating adhesive. It can be understood that the connecting piece 130 with flexible, slot, buckle, magnetic attraction, etc. can be used to connect the nose cover 110 and the mouth cover 120, which can facilitate the wearing of the nose cover 110 and the mouth cover 120 at the same time, and can also adjust the wearing position of the nose cover 110 and the mouth cover 120 according to the facial features (nose-mouth distance, etc.) of the patient.

[0049] In order to facilitate the description of the specific technical solutions of the present embodiment, the "up and down" and "left and right" directions are defined with reference to the posture of the split mask shown in FIGS. 2 and 3 (here, only the patient wears the split mask in a standing posture) without special explanation. The direction close to the patient's face is defined as the inner side, and the direction away from the patient's face is defined as the outer side. The above orientation definition does not limit the scope of the present application.

[0050] Further, as shown in FIG. 2, FIG. 3 and FIG. 4, the nasal cover 110 can include an oxygen tube interface 111, a carbon dioxide monitoring interface 112, a nasal pressure sensor 113 and a nasal negative particle interface 114. The nasal cover 110 can form an oxygen inhalation cavity, which can be an approximately pear-shaped cavity structure with a narrower upper part and a wider lower part, which can better fit the patient's face (nose and surrounding area). The oxygen tube interface 111 can be formed in the middle of the nasal cover 110, for connecting an external oxygen supply device to supply oxygen into the nasal cover 110 (through a tube). The carbon dioxide monitoring interface 112 can be formed near the middle of the nasal cover 110, in particular, can be formed above the oxygen tube interface 111 (closer to the nose to monitor the exhaled gas of the nose), for connecting an external carbon dioxide monitoring device to monitor the carbon dioxide content in the patient's exhaled gas, etc., to monitor the patient's respiratory status. The nasal pressure sensor 113 can be arranged near the middle of the nasal cover 110, in particular, can be formed on one side (right side in FIG. 2 and FIG. 4) of the oxygen tube interface 111 in the left-right direction, for monitoring the patient's respiratory status by monitoring the air pressure inside the nasal cover 110, especially for monitoring the patient's high-intensity breathing behavior (hiccups, snoring and coughing, etc.). The nasal negative particle interface 114 can be formed near the middle of the nasal cover 110, in particular, can be formed on the other side (left side in FIG. 2 and FIG. 4) of the oxygen tube interface 111 in the left-right direction, for connecting the negative particle generating device 200 to introduce negative particles into the nasal cover 110, to create a negative ion environment inside the nasal cover 110.

[0051] It can be understood that the oxygen tube interface 111, the carbon dioxide monitoring interface 112, the nasal pressure sensor 113 and the nasal negative particle interface 114 are arranged in the middle of the nasal cover 110, that is, in use, the above-mentioned components are close to the patient's nasal cavity, which can enhance the effect of each component. The nasal negative particle interface 114 is closer to the patient's nasal cavity, which is more conducive to using the coagulation effect of negative ions to promote the deposition of aerosol near the patient's nose. The oxygen tube interface 111 can achieve high-flow oxygen inhalation for the patient through an external oxygen supply device, and high-flow oxygen inhalation can improve snoring caused by tongue root falling back and soft tissue collapse in the pharynx after anesthesia, and reduce the generation of aerosol. The oxygen tube interface 111 and the external oxygen supply device connected thereto, the carbon dioxide monitoring interface 112 and the external carbon dioxide monitoring device connected thereto can reduce the safety risk of patients with high risk of upper airway obstruction or upper airway obstruction during anesthesia, and the carbon dioxide monitoring interface 112 and the external carbon dioxide monitoring device connected thereto can monitor the patient's respiratory status.

[0052] Further, as shown in FIG. 2, FIG. 3 and FIG. 5, the mouth cover 120 can include an endoscopy port 121, a mouth pressure sensor 122 and a mouth negative particle interface 123. The mouth cover 120 can form an endoscopy cavity, which can be a semi-spherical cavity (including an ellipsoidal cavity) capable of covering the oral cavity area. The airflow (aerosol) exhaled by the patient in the oral cavity can form a pressure loss in the mouth cover 120, and a local high-intensity turbulent flow can be formed near the endoscopy port 121, which can increase the deposition rate of large-particle virus aerosol on the inner wall of the cavity. The endoscopy port 121 can be formed in the middle of the mouth cover 120 for passing through endoscopy equipment such as a gastroscope. The mouth pressure sensor 122 can be arranged near the middle of the mouth cover 120, in particular, can be formed on one side (the right side in FIG. 2 and FIG. 5) in the left-right direction of the endoscopy port 121, for monitoring the breathing state of the patient by monitoring the air pressure inside the mouth cover 120, in particular, can monitor the high-intensity breathing behavior (hiccups, snoring and coughing, etc.) of the patient. The mouth negative particle interface 123 can be formed near the middle of the mouth cover 120, in particular, can be formed on the other side (the left side in FIG. 2 and FIG. 5) in the left-right direction of the endoscopy port 121, for connecting the negative particle generating device 200 to introduce negative particles into the mouth cover 120, to create a negative particle environment in the mouth cover 120.

[0053] It can be understood that the aerosol generation suppression mask system of the present application can further include a pressure monitor used in cooperation with the nasal pressure sensor 113 and the mouth pressure sensor 122, for monitoring and outputting the pressure change in the mask.

[0054] It can be understood that the mouth negative particle interface 123 is closer to the oral cavity of the patient, which is more conducive to the deposition of aerosol exhaled by the mouth. Due to the split design of the nasal cover 110 and the mouth cover 120, the structure of the mouth cover 120 can not consider the oxygen inhalation demand of the patient, i.e. the mouth cover 120 can not be provided with a sealing ring or other structure at the endoscopy port 121, so as to facilitate the movement, entry and exit of the endoscopy equipment, etc., which can improve the accuracy and convenience of the endoscopy operation of the doctor.

[0055] The negative electric particle generator 200 can continuously generate negative direct current high corona, and release a large number of electrons (e-) at high speed. The electrons cannot exist in the air for a long time (the life of the electrons existing in the air is only nanoseconds), and will be immediately captured by oxygen molecules (O2) in the air to form negative ions (negative electric particles). The negative ions with negative charges can combine with aerosols, viruses, bacteria and the like in the air to form charged particles and naturally settle (coagulation effect), so that the aerosols are deposited in the mask and are not easy to escape from the mask. As shown in FIGS. 9 and 10, the negative electric particle generator 200 can include a circuit board 210, a negative electric particle release plate 220, a concentration sensor 230, and a display screen 240. It can be understood that the negative electric particles referred to in the present application include but are not limited to electrons, single gas molecules with negative charges, light ion groups, and charged aerosol particles.

[0056] Specifically, the circuit board 210 can be connected with the negative electric particle release plate 220. The circuit board 210 can convert the input direct current or alternating current into alternating high voltage, and the pure direct current negative high voltage obtained after rectification and filtering can be output to the negative electric particle release plate 220. For example, the circuit board 210 can include LC oscillation circuit (resonant circuit), high-voltage diode, capacitor rectifier filter and the like. As shown in FIGS. 10 and 11, the negative electric particle release plate 220 can include a plurality of discharge bodies 221, which can be conical or pyramidal, i.e., the discharge body 221 can be a conical tip discharge body. The discharge body 221 can generate high corona under the action of direct current negative high voltage, and release a large number of electrons (negative polarity) at high speed. A large number of electrons can form a negative ion environment in the mask to promote the settlement of aerosols. The discharge body 221 can be made of carbon fiber and the like.

[0057] The concentration sensor 230 can be arranged near the output port of the negative electric particle generator 200 to monitor the concentration of negative electric particles output by the negative electric particle generator 200. The concentration information of the negative electric particles monitored by the concentration sensor 230 can be displayed on the display screen 240. For example, the concentration sensor 230 can input the monitored signal to a single-chip microcomputer or the like through an A / D conversion module (analog input signal to digital output signal) to determine whether the concentration of negative electric particles meets the requirements. The negative electric particle generator 200 can further include an automatic control system (including an automatic control system composed of the aforementioned circuit board, single-chip microcomputer, concentration sensor and the like). For example, if the concentration of negative electric particles exceeds the upper limit threshold set, the negative electric particle generator 200 can be temporarily turned off; if the concentration of negative electric particles is lower than the lower limit threshold set, the negative electric particle generator 200 can be turned on and continuously operated until the concentration of negative electric particles exceeds or equals the upper limit threshold.

[0058] Preferably, as shown in FIG. 10 and FIG. 11, the negative particle releasing plate 220 can further form a plurality of through holes 222 for passing gas, facilitating the flow of gas to release the negative particles. Optionally, the negative particle generating device 200 can further comprise a fan, which can blow out the gas stream containing negative ions outward, promoting the formation of a negative ion environment in the mask.

[0059] Preferably, as shown in FIG. 10 and FIG. 11, the negative particle releasing plate 220 can further form a sensor passing hole 223 for passing the connecting wire of the concentration sensor 230.

[0060] In one experimental example, when the negative particle concentration is in the range of 1.5 x 10 5 / cm 3 ~ 7.0 x 10 5 / cm 3 , the negative particles have a significant coagulation effect on particles with a particle size of ≤ 0.626 μm (micrometer), which can effectively reduce the exposure dose of the respiratory tract of the human body. When the negative particle concentration is > 7.0 x 10 5 / cm 3 , the cost-benefit ratio of the coagulation effect does not change significantly. Therefore, the lower threshold of the negative particle concentration can be set to 1.5 x 10 5 / cm 3 , and the upper threshold can be set to 7.0 x 10 5 / cm 3 .

[0061] As shown in FIG. 9 and FIG. 10, the negative particle generating device 200 can further comprise a solution output hose 251 and a power supply wire 252. The output hose 251 can be connected to the mask (split mask 100) to transport the negative particles generated by the negative 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 can be a silicone hose, which can form a silicone seal with the nose cover 110 and the mouth cover 120, respectively, and can be inserted and pulled out in one direction.

[0062] Preferably, the negative particle generating device 200 can be connected to the nose negative particle interface 114 of the nose cover 110 and the mouth negative particle interface 123 of the mouth cover 120 at the same time. It can be understood that the negative particle generating device 200 can also be connected to the nose cover 110 or the mouth cover 120 separately, especially can be connected to the mouth cover 120 with a higher aerosol concentration separately.

[0063] Preferably, as shown in FIG. 1, the output hose 251 can be connected to the nasal cover 110 and the oral cover 120 via a three-way pipe 300 through silica gel hoses respectively. The three-way pipe 300 can be provided with a valve 310 for switching the specific connection form of the split face mask 100 and the negative particle generating device 200, i.e. switching between connecting the nasal cover 110 alone, connecting the oral cover 120 alone, and connecting the nasal cover 110 and the oral cover 120 simultaneously. The valve 310 can be a one-way valve to prevent backflow of liquid in the split face mask 100.

[0064] Optionally, the negative particle generating device 200 can also be provided with a timer. For example, the usual gastroscopy time is 5-10 minutes, and the timer can be set to automatically turn off the negative particle generating device 200 after 15 minutes of turning on, avoiding the additional workload of the doctor manually turning on and off the device.

[0065] Preferably, as shown in FIG. 2, FIG. 3 and FIG. 4, the nasal cover 110 can further include a nasal wearing connection 115, a nasal sealing member 116 and an elastic band. The nasal cover 110 can include a plurality of nasal wearing connections 115, preferably, the nasal cover 110 can include two nasal wearing connections 115, which can be respectively arranged on both sides of the bottom of the nasal cover 110. The two nasal wearing connections 115 can be respectively connected to the two ends of the elastic band, and the nasal cover 110 can be worn on the head and / or neck of the patient through the elastic band. The nasal sealing member 116 can be arranged around the edge of the nasal cover 110, in particular, can be arranged around the inner side of the edge of the nasal cover 110, so that the nasal cover 110 can be closely fitted to the nose of the patient. The nasal sealing member 116 can enhance the sealing performance of the nasal cover 110 after wearing, reduce the escape of aerosol exhaled by the patient, and at the same time, it can help to adapt to the characteristics of the nose of different patients, improve the wearing comfort of the patient, etc. Preferably, the nasal sealing member 116 can be an airbag rubber pad, in particular, can be an airbag rubber pad integrally formed by a medical polymer material (such as medical liquid silicone), which can reduce the gas leakage in the nasal cover 110.

[0066] As shown in FIG. 2, FIG. 3 and FIG. 5, the mouth cover 120 can further comprise a mouth wearing connection 124, a mouth seal 125 and an elastic band. The mouth cover 120 can comprise a plurality of mouth wearing connections 124, preferably, the mouth cover 120 can comprise two mouth wearing connections 124, which can be respectively arranged on both sides of the middle part of the mouth cover 120. The two mouth wearing connections 124 can be respectively connected to the two ends of the elastic band, and the mouth cover 120 can be worn on the head and / or neck of the patient through the elastic band. The mouth seal 125 can be arranged around the edge of the mouth cover 120, especially the inner side of the edge of the mouth cover 120, so that the mouth cover 120 can be tightly fitted to the oral cavity of the patient. The mouth seal 125 can enhance the sealing performance of the mouth cover 120 after wearing, reduce the escape of aerosol exhaled by the patient, and at the same time, it can help to adapt to the facial features of different patients and improve the wearing comfort of the patient. Preferably, the mouth seal 125 can be an air bag rubber pad, especially an air bag rubber pad integrally formed by a medical polymer material (such as medical liquid silicone), which can reduce the gas leakage in the mouth cover 120.

[0067] Preferably, as shown in FIG. 2 and FIG. 3, the nasal pressure sensor 113 and the mouth pressure sensor 122 can be located on the same side of the split mask (for example, both on the right side). The nasal negative particle interface 114 and the mouth negative particle interface 123 can be located on the other side of the split mask (for example, both on the left side). This arrangement can facilitate the connection of the mouth cover and the nasal cover with the external equipment respectively, and can avoid or reduce the crossing and knotting of the connecting pipeline, so as to improve the operation convenience and the appearance of the equipment.

[0068] As shown in FIG. 2 and FIG. 7, the mouth cover 120 can further comprise an inspection port accessory, which can be combined with the mouth cover 120 (especially the inner endoscopic port 121) in a snap (groove) connection, a threaded connection, a magnetic attraction connection, etc.

[0069] Preferably, the inspection port accessory can select the first inspection port accessory 126 or the second inspection port accessory 127 according to the actual needs of the patient.

[0070] The first inspection port accessory 126 can be suitable for patients without potential mask ventilation difficulties and risk factors, i.e. young and middle-aged people, body mass index (BMI) ≤26 kg / m 2Patients with a chin-neck distance ≥8cm and a Mallampati classification of difficulty in intubation (class I-II) are eligible for this treatment. These patients have a lower concentration of viral aerosols released during endoscopy, primarily due to splashing of viral aerosol liquid from the tube wall during extubation. As shown in Figures 2 and 6, the first examination port accessory 126 can be a hollow, cone-shaped structure, which may include two sleeved cone-shaped structures (or bullet-shaped structures). The outer top of the first examination port accessory 126 (the part furthest from the wearer's mouth) (the top of the outer cone-shaped structure) can form a valve structure 1261, with an opening in the middle for the passage of endoscopic instruments. The valve structure 1261 may include multiple valves (blades) for scraping fluid from the tube wall during extubation. For example, in this embodiment, the valve structure 1261 includes five valves, which can be arranged adjacently and partially overlap. When the endoscope tube is removed, the valve shape is at least partially aligned with the endoscope tube, allowing exhaled airflow (aerosol) to escape through the gaps between the valves. The opening direction of the gaps between the valves can be consistent with or close to the radial direction of the endoscope tube. As the escaping airflow and aerosol enter and exit the gaps between the valves, changes in flow channel diameter and direction can create multiple (e.g., three) local pressure losses. This significantly enhances the inertial collision, turbulent sedimentation, and gravitational deposition effects of exhaled aerosols, resulting in a significantly higher sedimentation rate of exhaled aerosols on the outer wall of the endoscope tube and the inner surface of the valve structure compared to conventional examination port structures. A collection groove 1262 can also be formed between the inner and outer conical structures (between the two layers of material) of the first examination port accessory 126. That is, the collection groove 1262 is formed at the inner bottom of the first examination port accessory 126 (the part near the wearer's mouth). The valve structure 1261 can scrape the fluid on the endoscope tube wall into the collection groove 1262 when the endoscope tube is removed, preventing fluid backflow or splashing. For example, the wall thickness of the first examination port accessory 126 can be 1 mm.

[0071] The second inspection port accessory 127 can be used for patients with potential mask ventilation difficulties or risk factors, namely older age (greater than 55 years old) and body mass index (BMI) > 26 kg / m². 2 The patient's chin-neck distance is <8cm, and the patient's airway grading (Mallampati) for intubation difficulty is grade II or higher. (For example, an elderly patient whose routine anesthesia assessment before endoscopy shows a BMI of 30 kg / m²) 2, and the mandible-chin distance is 5 cm, and the Mallampati classification is grade III, and there is a high risk of difficult mask ventilation. Such patients may have problems such as snoring caused by tongue root falling backward and pharyngeal soft tissue collapse after anesthesia during endoscopy, and the concentration of virus aerosol released by them is relatively high. In addition to considering the liquid splashing of virus aerosol in the process of endoscope tube extubation, the escape of virus aerosol during endoscopy should also be considered. It is recommended to choose the second examination port accessory 127. As shown in FIGS. 7 and 8, the second examination port accessory 127 can be a sandglass-shaped (double-hopper-shaped), that is, the inner part (the part close to the wearer's mouth) of the second examination port accessory 127 gradually decreases in diameter from inside to outside, and the outer part (the part away from the wearer's mouth) of the second examination port accessory 127 gradually increases in diameter from inside to outside (the inner part and the outer part are divided by the axial center of the second examination port accessory 127). The center of the second examination port accessory 127 can form a through hole to pass through the endoscope tube. The tapered design of the inner part of the second examination port accessory 127 can form a local high-intensity turbulent flow in a limited space, which can increase the collision of large-particle virus aerosol with the wall surface and increase the aerosol settling rate. The diverging design of the outer part of the second examination port accessory 127 can increase the pressure loss of the patient's exhaled airflow and effectively reduce the airflow velocity, so that the large-particle virus aerosol settles to the inner wall of the outer part under the action of gravity. As shown in FIG. 8, the inner side of the middle part of the second examination port accessory 127 can be provided with a filter 1271. Preferably, the filter 1271 can be a disposable filter cotton ring, which can be made of high water absorption fiber with high water absorption and low price. It can have a certain absorption and removal effect on the endoscope tube wall liquid and the patient's exhaled liquid, and can prevent liquid reflux or splashing.

[0072] Preferably, the nasal pressure sensor 113 and the oral pressure sensor 122 can be respectively arranged (attached) on the inner side (close to the face side) of the nasal mask body 110 and the oral mask body 120. The nasal pressure sensor 113 and the oral pressure sensor 122 can be selected from flexible thin film pressure sensors, which are resistance pressure sensitive sensors.

[0073] It can be understood that the face mask system provided by the embodiment for inhibiting aerosol generation can be applied to various endoscopic examinations, including but not limited to gastroscopy, esophagoscope, upper gastrointestinal endoscopy, etc. The face mask system can also be widely used in various medical examinations, treatments, etc. that need to inhibit the exhalation of respiratory and / or digestive tract aerosols.

[0074] The embodiment of the present application also provides a use method of the face mask system for inhibiting aerosol escape based on negative electric particles, as shown in FIG. 12, which is suitable for the above-mentioned face mask system for inhibiting aerosol escape based on negative electric particles.

[0075] The negative particle generator 200 can be a preset module arranged in a use environment. For example, before the start of an endoscopy under general anesthesia, the negative particle generator 200 can be placed near the patient's head on the examination bed. The silicone hose connected with the negative particle generator 200 and the face mask, and the nasal mask 110 and the oral mask 120 can be disposable supplies, or the nasal mask 110 and the oral mask 120 can be reusable supplies. Connect the relevant electrical equipment to the power supply.

[0076] Before the start of an endoscopy under general anesthesia, the first examination port accessory 126 (for young and middle-aged patients, body mass index (BMI) ≤ 26 kg / m 2 , chin-nose distance ≥ 8 cm, and patients with Mallampati classification assessment of Ⅰ-Ⅱ level) or the second examination port accessory 127 (for older patients, body mass index (BMI) > 26 kg / m 2 , chin-nose distance < 8 cm, and patients with Mallampati classification assessment of Ⅱ level or above) can be selected according to whether the patient has potential mask ventilation difficulty risk factors, and connected to the endoscopy port 121 of the mouth mask 120.

[0077] The nasal mask 110 and the oral mask 120 are connected. When wearing the nasal mask 110, one hand tightly fits the nasal mask 110 around the nasal cavity, and the other hand pulls the wearing rope through the patient's head, adjusts the wearing rope (for example, adjusts the buckle), and adjusts the patient's head circumference while making the nasal mask 110 fit (seal fit). The oral mask 120 is attached to the patient's mouth and does not require a tight fit. The wearing rope is worn on the neck and is simply fixed.

[0078] The oxygen inhalation tube and the carbon dioxide monitoring tube of the oxygen inhalation equipment are respectively connected to the oxygen inhalation tube interface 111 and the carbon dioxide monitoring interface 114 of the nasal mask 110. One end of the hose 220 of the negative particle generator 200 is connected to the negative particle interface (114, 123) of the nasal mask 110 and the oral mask 120, and the other end is connected to the negative particle generator 200 (a three-way interface). The sensor connection line is connected to the nasal pressure sensor 113 and the oral pressure sensor 122.

[0079] After the start of the general anesthesia endoscopy, the negative particle generator 200 is turned on, and negative particles are continuously generated by the discharge body 221 of the negative particle release plate 220, and are transported into the nose cover 110 and the mouth cover 120 through the hose, so that the coagulation of the aerosol nuclei with a particle size of ≤0.626 μm is realized by the negative particles, and the aerosol nuclei are settled on the inner edge wall of the split mask, so that the risk of aerosol escape can be effectively reduced. The concentration sensor built-in (near the output port) of the negative particle generator can continuously monitor the concentration of negative particles at the output port of the negative particle generator, and can output the concentration value in real time through the display screen 240. When the concentration of negative particles is less than 1.5 × 10 5 pt / cm 3 , the negative particle generator 200 can be turned on through the built-in feedback control circuit; when the concentration of negative particles reaches 7.0 × 10 5 pt / cm 3 , the negative particle generator 200 can be turned off.

[0080] During the general anesthesia endoscopy, the mucus generated by the doctor inserting and pulling out the endoscope tube in the digestive tract can be removed by the flap structure 1261 of the first examination port accessory 126 or the filter 1271 of the second examination port accessory 127, so as to reduce the risk of medical staff infection caused by the mucus aerosolization when pulling out the tube.

[0081] After the general anesthesia endoscopy is completed, the connecting pipe of the nose cover 110 / mouth cover 120 and the negative particle generator 200 is pulled out, and the negative particle generator is turned off.

[0082] It can be understood that the sequence of the use method of the mask system based on negative particles for inhibiting aerosol escape given above is exemplary, and part of the steps can be omitted or the sequence can be changed in actual operation. The following briefly describes part of the beneficial effects of the above embodiments of the present application.

[0083] The mask system based on negative particles for inhibiting aerosol escape and the use method thereof provided by the present application can form a local negative particle environment near the mouth of the patient with a high risk of aerosol overflow. By using the coagulation effect of negative particles on submicron particles, the aerosol escaping from the mouth area of the mask can be reduced, and the exposure risk of medical staff to aerosol can be reduced.

[0084] It can be understood that in the present application, when the number of components or members is not particularly limited, the number can be one or more, and the plurality here refers to two or more. For the case where the number of components or members is described as a specific number such as two, three, four, etc. in the drawings and / or the description, the specific number is generally exemplary rather than limiting, and can be understood as a plurality, i.e. two or more, but this does not mean that the present application excludes the case of one.

[0085] It should be understood that the above-described embodiments are merely exemplary and not intended to limit the present application. Various modifications and alterations of the above-described embodiments can be made by those skilled in the art within the scope of the present application without departing from the scope of the present application.

Claims

1. A mask system based on negative electric particles to inhibit aerosol escape, characterized in that, The mask system comprises a mask and a negative particle generating device (200), The mask comprises a mouth cover (120), the mouth cover (120) comprises a mouth negative particle interface (123), the mouth negative particle interface (123) is connected to the negative particle generating device (200), The negative particle generating device (200) comprises a circuit board (210) and a negative particle release plate (220), the negative particle release plate (220) forms a plurality of discharge bodies (221), the circuit board (210) is connected to the negative particle release plate (220) to make the discharge bodies (221) generate negative particles, The negative particles generated by the negative particle generating device (200) can be introduced into the mouth cover (120) through the mouth negative particle interface (123) to promote the aerosol to settle in the mask.

2. The negative particle based aerosol escape inhibiting face mask system of claim 1, wherein, The mask is a split mask (100), the split mask (100) further comprises a nose cover (110), the nose cover (110) and the mouth cover (120) are used to fit the face of the wearer respectively without being communicated with each other, The nose cover (110) comprises a nose negative particle interface (114), the nose negative particle interface (114) is connected to the negative particle generating device (200), The negative particles generated by the negative particle generating device (200) can be introduced into the nose cover (110) through the nose negative particle interface (114) to promote the aerosol to settle in the split mask (100).

3. The negative particle based aerosol escape inhibiting face mask system of claim 1, wherein, The negative particle generating device (200) further comprises a concentration sensor (230), The concentration sensor (230) is arranged at the output port of the negative particle generating device (200) to monitor the concentration of negative particles output by the negative particle generating device (200).

4. The negative particle based aerosol escape inhibiting face mask system of claim 3, wherein, The negative particle generating device (200) further comprises a display screen (240), the display screen (240) is connected to the concentration sensor (230) to display the reading of the concentration sensor (230).

5. The negative-particle-based aerosol-exit-inhibited face mask system of claim 1, wherein, The negative particle generating device (200) further comprises a fan, the negative particle release plate (220) is further formed with a plurality of through holes (222) to blow out the airflow containing negative ions outward.

6. The negative-particle-based aerosol-exit-inhibited face mask system of claim 2, wherein, The mask system further comprises a tee pipe (300), the tee pipe (300) has a one-way valve (310) The negative particle generating device (200) is connected to the nose negative particle interface (114) and the mouth negative particle interface (123) respectively through the tee pipe (300), The one-way valve (310) can control the communication of the negative particle generating device (200) with the nose cover (110) and / or the mouth cover (120).

7. The negative-particle-based aerosol-exit-inhibiting face mask system of claim 1, wherein, The negative particle generating device (200) further comprises an automatic control system for controlling the operation of the negative particle generating device (200) by monitoring the concentration of the negative particles delivered into the mask; and / or The negative particle generating device (200) further comprises a timer for controlling the negative particle generating device to automatically turn on and / or turn off.

8. The negative-particle-based aerosol-exit-inhibiting face mask system of claim 1, wherein, The discharge body (221) is a conical tip discharge body, and a material of the discharge body (221) is carbon fiber.

9. The negative-particle-based aerosol-exit-inhibiting face mask system of claim 1, wherein, The concentration of the negative electric particles outputted by the negative electric particle generating device (200) is between 1.5 x 10 5 / cm 3 and 7.0 x 10 5 / cm 3 .

10. A method of using a face mask system based on negative electric particles to inhibit aerosol escape, characterized in that, The mask system based on negative particles is suitable for use in the mask system based on negative particles according to any one of claims 1 to 9, The use method comprises: Wearing the mouth cover (120) and connecting the mouth cover (120) with other devices; Turning on the negative particle generating device (200), and the plurality of discharge bodies (221) of the negative particle releasing plate (220) generate negative particles, the negative particles coagulate with the nuclei of the droplets, and the nuclei of the droplets are deposited in the mask, Monitoring the release concentration of the negative particles to control the operation of the negative particle generating device (200).

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