CN102921083A - Double-balloon laryngeal mask airway for gastroenterological endoscope examination - Google Patents
Double-balloon laryngeal mask airway for gastroenterological endoscope examination Download PDFInfo
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- CN102921083A CN102921083A CN2012104590723A CN201210459072A CN102921083A CN 102921083 A CN102921083 A CN 102921083A CN 2012104590723 A CN2012104590723 A CN 2012104590723A CN 201210459072 A CN201210459072 A CN 201210459072A CN 102921083 A CN102921083 A CN 102921083A
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Abstract
The invention discloses a structure of a double-balloon laryngeal mask airway for gastroenterological endoscope examination. The double-balloon laryngeal mask airway comprises a ball balloon, a cover balloon, an air vent pipe, an air source joint, inflation tubes, a plug and pressure indicators, wherein the ball balloon is ball-shaped; the cover balloon is oval-shaped; the air vent pipe sequentially passes through the ball balloon and the cover balloon; a front-end opening of the air vent pipe is wrapped by the ball balloon to form a ring-shaped balloon buffering opening, the middle part of air vent pipe is connected with the cover balloon to form a back balloon, and an opening in the back end of the air vent pipe is connected with the plug; a bypass channel opening in a side wall of the air vent pipe is connected with the air source joint; and the side wall or the rear part of the air vent pipe is connected with the inflation tubes communicated with the pressure indicators. A gastroenterological endoscope enters the esophagus and the stomach or an intestine of a human body through independent cavity channels at the inner part of the air vent pipe; and a supporting table and a blocking piece are arranged at an air vent opening in the middle part of a laryngeal mask, and the air vent opening is communicated with a trachea of the human body to form a closed respiration channel. Through the adoption of the double-balloon laryngeal mask airway, gastroenterological endoscope examination can be conducted while a patient has an anesthesia operation or is rescued, and reflux content in the stomach can be prevented from entering the trachea, so as to reduce pain of the patient and improve the safety of the operation.
Description
Technical field
The invention belongs to a kind of medical apparatus and instruments of artificial airway's ventilation, relate to a kind of intubating laryngeal mask airway, relate in particular to the two air bag intubating laryngeal mask airways of a kind of gastrointestinal endoscopy.
Technical background
Intubating laryngeal mask airway (Laryngeal mask airway, LMA) is called for short laryngeal mask, is comprised of an airway and inflatable gas hood of circle of far-end, implants it pharyngeal and inject an amount of air in gas hood, and sealing throat can ventilate.It is unobstructed that laryngeal mask is conducive to maintenance air passage, and do not need special position, easy and simple to handle rapid, can race against time, and saves patient's life.Therefore laryngeal mask is set up the medical apparatus and instruments of artificial airway's ventilation as a kind of patient for surgery anesthesia, critical patient rescue or other assisted respiartion, has been widely applied and has obtained huge success in fields such as clinical anesthesia, difficult airway management and emergencies.
ProSeal laryngeal mask airway (LMA-ProSeal) is Proseal Laryngeal Mask Airway.ProSeal laryngeal mask airway be front two generation laryngeal mask (first on behalf of the standard laryngeal mask snorkel, the second Special laryngeal mask airway on behalf of guidance tracheal intubation) increased again an esophagus drainage tube on the basis, to backflowing, mistake is inhaled good preventive effect, can carry ventilating mode safer, comfortable, that wound is slight, side effect is little for the patient.Proseal Laryngeal Mask Airway inherited front two generation laryngeal mask many advantages, have more simultaneously oneself characteristics, mainly contain: (1) has the design of breather and drainage tube, drainage tube can insert stomach tube drain gastric juice, prevents flatulence and the mistake of backflowing is inhaled; (2) the laryngeal mask far-end is positioned at the esophagus opening, fixes, and is difficult for displacement.Clinical research shows, use in the clinical operation Proseal Laryngeal Mask Airway have simple to operate, put pipe success rate height, hemodynamic stability, the induction period medication is few and complications is few advantage, effectiveness and safety improve greatly, are easy to apply in clinical anesthesia.
Thereby the using value of ProSeal laryngeal mask airway on clinical anesthesia, receive anaesthetizing the very big concern of medical personnel and medical device industry.But the drain tract that can insert the stomach tube drain is very narrow and small, can't carry out complicated Gastrointestinal Endoscopes and detect or operation technique, becomes its weak point.In the last few years, for satisfying the needs of anesthesia surgery and gastrointestinal endoscopy development, also increasing to the research of the aspects such as improvement of ProSeal laryngeal mask airway structure.Relevant ProSeal laryngeal mask airway is reported by following patent documentation:
1, Chinese July 1 2009 CN201263829Y(Granted publication day of utility model description Granted publication) " monotube multi-cavity type ProSeal laryngeal mask airway ", disclose its structure and comprised cover capsule, breather, drainage tube and gas tube, it is characterized in that the integrated one body that is set to include ventilation tract, drain tract and inflation tract of described breather, drainage tube and gas tube; Body is fixedly connected with the cover capsule, described each tract and the venting cavity of the connection person's windpipe of the mutual isolation of the corresponding setting of cover capsule, the drainage lumens of connection human body esophagus and the inflatable chamber of connection cover capsule in the body.
Its advantage: set up the tract that esophagus is communicated with atmosphere, but the balance intragastric pressure improves the equipment safety coefficient, sealing gasket agent balloon structure can form sealing in human body throat position effectively.
But its weak point: the drain tract is narrow and small, can only allow the thinner bodys such as stomach tube to pass through, although designed sealing gasket, can't esophagus be sealed fully, and gastric juice or gastric content may overflow, and have certain risk.
2, Chinese June 30 utility model description 2010 CN201516220U(Granted publication day of Granted publication) " built-in block type ProSeal laryngeal mask airway ", disclose its structure and comprised laryngeal mask and gullet drainage tube, the front end of described laryngeal mask is the cover capsule, the rear end is breather, an end relative with the cover capsule at breather is equipped with gas source connector, connecting gas tube on the gas source connector, be connected with pressure indicator on the gas tube, gas tube is built-in with the intubating laryngeal mask airway for the single-tube multiple-cavity road structure of the gullet drainage tube formation of esophagus drain, it is built-in with the gullet drainage tube for the esophagus drain, in the Front-end Design of drainage tube the esophageal obstruction cuff is arranged.
Its advantage: have the esophageal obstruction function, when being inflated, the knapsack of intubating laryngeal mask airway can make the cover capsule rely on the displacement of trachea, improved the sealing of cover capsule, the gullet drainage tube of intubating laryngeal mask airway is free to the flexible conduction hole of coming in and going out, and is easy to update.
But its weak point is that be Split type structure with the drainage tube of esophageal obstruction cuff with the cover capsule, between have certain gap, can not guarantee fully airtight, and must two operations during operation.
3, Chinese utility model description Granted publication CN February 16 2011 201020285670.X(Granted publication day) " esophagus-blocking type double-sac laryngeal cover " disclosed its structure and comprised: cover capsule, occlusion balloon, breather, machine end joint, gas tube, pilot balloon, Non-return air valve, relief pipe, the relief pipe joint forms, the cover capsule is oval, its front-end and back-end are respectively equipped with occlusion balloon, and its rear end connects breather, and breather one end connects a machine end joint; It places relief pipe in the cover utricule, and the one end communicates with relief chamber, and the other end and relief pipe joint join, gas tube one end connects the cover capsule, the other end connects pilot balloon or pressure indicator, and the other end of pilot balloon connects Non-return air valve, and described cover capsule inner chamber and occlusion balloon inner chamber communicate.The occlusion balloon of front end can effectively prevent the esophageal reflux material.
But its weak point: although the occlusion balloon of front end can effectively prevent the esophageal reflux material, the occlusion balloon complete closed of front end esophagus, can't carry out the detection of esophagus or stomach.
Therefore, the present medical device industry problem that prior art exists that needs to be resolved hurrily, and propose existing ProSeal laryngeal mask airway is carried out improved requirement, a kind of novel intubating laryngeal mask airway is developed in meanwhile expectation.
Summary of the invention
The present invention is intended to carry out on the basis of ProSeal laryngeal mask airway improved a kind of gastrointestinal endoscopy with two air bag intubating laryngeal mask airways, this intubating laryngeal mask airway is a kind of intubating laryngeal mask airway that can satisfy simultaneously anesthesia surgery and gastrointestinal endoscopy, it can conveniently be inserted and locate, and significantly reduce the incidence rate of backflowing and missing suction, thereby overcome the weak point that prior art exists.
The present invention for achieving the above object, the technical scheme that adopts is:
A kind of gastrointestinal endoscopy comprises by cover capsule, breather with two air bag intubating laryngeal mask airways, drainage tube, gas tube, gas source connector and pressure indicator, it is characterized in that: by sacculus, the cover capsule, breather, gas source connector, gas tube, plug and pressure indicator form, and the structure of described sacculus cover capsule and breather is as follows respectively:
Described sacculus, its contour structures is designed to sphere, elliposoidal, cylindrical, truncated cone-shaped is any shape wherein, and sacculus is arranged on breather front end place, and wraps the breather front opening, one circle groove of sacculus and breather inwall front end is fitted smooth-going, the common annular air-pocket buffering opening that forms, its inside communicates sacculus by an independent tract of establishing in the perforate on the breather outer wall and the breather, breather, the common inflated path that forms an independent completion of gas tube and pressure indicator;
Described cover capsule, its contour structures is designed to oval, pyriform or elliposoidal is any shape wherein, cover capsule top and breather form airtight back air bag, its inside communicates by an independent tract of establishing in the perforate on the breather inwall and the breather, airtight bonding common formation one blow vent of lower open end and breather, and be provided with catch in open end, catch is shaped as semicircle, tongue shape, rail shape or any geometry, optional wherein a kind of, the cover capsule, the independent tract in the breather, the common cover capsule gas fill port that forms an independent completion of gas tube and pressure indicator;
Described breather, for being the multi-cavity road body of 100 °～180 ° of arcs, successively through sacculus and cover capsule, its inside is provided with separate separately a plurality of independent tract, its front end is provided with a front opening, the inwall of its intermediate openings is provided with brace table, its rear end is provided with an open rearward end, open rearward end is connected with a dismountable plug, the breather sidewall is provided with a bypass channel opening and closely is connected with gas source connector, and its sidewall rearward end is provided with gas tube, and described gas tube is designed to gas tube and gas tube, described gas tube and gas tube are connected with pressure indicator with the pressure indicator that pressure indicator is designed to respectively.
Described independent tract, be designed to 2～8 independent tracts that connect, Gastrointestinal Endoscopes enters human body esophagus and gastrointestinal section by the independent tract that internal diameter is designed to 5mm ~ 20mm, being positioned at the independent tract that the breather sidewall is provided with a branch is connected with gas source connector, and link to each other with respirator or anesthetic machine, blow vent by the breather middle part communicates with person's windpipe, forms airtight breathing path.
The two air bag intubating laryngeal mask airways of described gastrointestinal endoscopy, its material is medical grade silicon rubber or medical plastic cement.
In the present invention, described pair of air bag is respectively sacculus and cover capsule.
Beneficial effect
Compared with prior art, beneficial effect of the present invention is: when 1, the present invention can realize carrying out anesthesia surgery the patient is carried out gastrointestinal endoscopy, operator need not any supplementary means and can insert under patient's nature position.2, the anaesthetist also can insert a drainage stomach tube in patient's esophagus by the present invention, and the material that will backflow is drawn.3, the sacculus of front end of the present invention can effectively seal patient's esophagus, prevents from that the gastric material backflows in the operation process to enter patient airway, improves operation safety.
Description of drawings
Fig. 1 is the front view of structure of the present invention;
Fig. 2 is the front view of the breather among Fig. 1;
Fig. 3 is the truncation surface cutaway view of the breather among Fig. 1;
Fig. 4 is the present invention's user mode sketch map on human body.
Among Fig. 1: 1 sacculus; 2 cover capsules; 3 breathers; 4 gas source connectors; 5 gas tubes, 5-1 gas tube, 5-2 gas tube; 6 plugs; 7 pressure indicators, 7-1 pressure indicator, 7-2 pressure indicator.
Among Fig. 2: 3 breathers; The 3-5 front opening; The 3-6 intermediate openings; The 3-7 open rearward end; The 3-8 brace table.
Among Fig. 3: 3 breathers; 3-1; 3-2; 3-3; 3-4 independence tract.
Among Fig. 4: 1 sacculus; 2 cover capsules; 3 breathers; 4 gas source connectors; 5 gas tubes; 6 plugs; 7 pressure indicators; 8 Gastrointestinal Endoscopes.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the solution of the present invention is described in further detail.
Embodiment 1:
As depicted in figs. 1 and 2, a kind of gastrointestinal endoscopy by sacculus 1, covers capsule 2 with two air bag intubating laryngeal mask airways, breather 3, and gas source connector 4, gas tube 5, plug 6 and pressure indicator 7 form, described sacculus 1, the structure of cover capsule 2 and breather 3 is as follows respectively:
Described sacculus 1, its contour structures is designed to sphere, elliposoidal, cylindrical, truncated cone-shaped is any shape wherein, present embodiment is designed to sphere, sacculus 1 is arranged on breather 3 front end places, and wrapping breather 3 front opening 3-5, sacculus 1 is smooth-going with a circle groove applying of breather 3 inwall front ends, jointly forms annular air-pocket buffering opening, its inside communicates by an independent tract 3-3 who establishes in the perforate on breather 3 outer walls and the breather 3, sacculus 1, breather 3, the common inflated path that forms an independent completion of gas tube 5-1 and pressure indicator 7-1;
Described cover capsule 2, its contour structures is designed to oval, pyriform or elliposoidal is any shape wherein, present embodiment is designed to oval, cover capsule 2 tops and breather 3 form airtight back air bag, its inside communicates by an independent tract 3-4 who establishes in the perforate on breather 3 inwalls and the breather 3, lower open end and breather 3 airtight bonding common formation one blow vent 2-2, and be provided with catch 2-1 in open end, catch 2-1 shape is designed to semicircle, tongue shape, rail shape or any geometry, present embodiment is designed to semicircle, cover capsule 2, independent tract 3-4 in the breather 3, the common cover capsule gas fill port that forms an independent completion of gas tube 5-2 and pressure indicator 7-2;
Described breather 3, for being the multi-cavity road body of 100 °～180 ° of arcs, present embodiment is designed to the multi-cavity road body of 120 ° of arcs, successively through sacculus 1 and cover capsule 2, its inside is provided with separate separately a plurality of independent tract, its front end is provided with a front opening 3-5, the inwall of its intermediate openings 3-6 is provided with brace table 3-8, its rear end is provided with an open rearward end 3-7, open rearward end 3-7 is connected with a dismountable plug 6, breather 3 sidewalls are provided with a bypass channel opening and closely are connected with gas source connector 4, its sidewall rearward end is provided with gas tube 5, described gas tube 5 is designed to gas tube 5-1 and gas tube 5-2, and described gas tube 5-1 and gas tube 5-2 are connected with pressure indicator 7-2 with the pressure indicator 7-1 that pressure indicator 7 is designed to respectively.
As shown in Figure 3 and Figure 4, described independent tract, be designed to 2～8 independent tracts that connect, present embodiment is designed to 5 independent tracts, Gastrointestinal Endoscopes 8 enters human body esophagus and gastrointestinal section by the independent tract 3-1 that internal diameter is designed to 15mm, is positioned at the independent tract 3-2 that breather 3 sidewalls are provided with a branch and is connected with gas source connector 4, and link to each other with respirator or anesthetic machine, blow vent by breather 3 middle parts communicates with person's windpipe, forms airtight breathing path.
The two air bag intubating laryngeal mask airways of described gastrointestinal endoscopy, its material is medical grade silicon rubber or medical plastic cement, present embodiment is designed to medical grade silicon rubber.
Application process:
The present invention operates use by the anaesthetist who was subjected to professional training or clinical nurse.Operating process, as shown in Figure 4:
1, before insertion, syringe nozzle is inserted the syringe interface that is connected with 7-2 with pressure indicator 7-1, find time fully sacculus 1 and cover capsule 2 are close to airbag wall, in order to easily enter patient's pharyngolaryngeal cavity with smaller size smaller each other.
2, be applied in sacculus 1 and cover capsule 2 with water miscible lubricant before the insertion laryngeal mask.
3, the anaesthetist grips breather 3, and sacculus 1 is inserted the oral cavity along hard palate, will cover capsule 2 openings and aim at the patient airway mouth, and sacculus 1 enters esophageal orifice.Respectively to pressure indicator 7-1 and 7-2 inflation, sacculus 1 and cover capsule 2 are filled up with syringe.
4, respiratory organ is connected on the laryngeal mask gas source connector 4, opens plug 6 with the independent tract 3-1 insertion patient stomach of Gastrointestinal Endoscopes 8 by breather 3, carry out gastrointestinal endoscopy.
5, after inspection or operation are finished, extract Gastrointestinal Endoscopes 8 out, from pressure indicator 7-1 and the emptying sacculus 1 of 7-2 insertion syringe with after covering capsule 2, gastrointestinal endoscopy is pulled out with two air bag intubating laryngeal mask airways.
The above only is preferred embodiment of the present invention, is not structure of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment does.
Claims (3)
1. a gastrointestinal endoscopy comprises by cover capsule, breather with two air bag intubating laryngeal mask airways, drainage tube, gas tube, gas source connector and pressure indicator, it is characterized in that: by sacculus (1), cover capsule (2), breather (3), gas source connector (4), gas tube (5), plug (6) and pressure indicator (7) form, and the structure of described sacculus (1) cover capsule (2) and breather (3) is as follows respectively:
Described sacculus (1), its contour structures is designed to sphere, elliposoidal, cylindrical, truncated cone-shaped is any shape wherein, sacculus (1) is arranged on breather (3) front end place, and wrap breather (3) front opening (3-5), sacculus (1) is fitted smooth-going with a circle groove of breather (3) inwall front end, the common annular air-pocket buffering opening that forms, it is inner to communicate sacculus (1) by an independent tract (3-3) of establishing in the perforate on breather (3) outer wall and the breather (3), breather (3), gas tube (5-1) and pressure indicator (7-1) form the inflated path of an independent completion jointly;
Described cover capsule (2), its contour structures is designed to oval, pyriform or elliposoidal is any shape wherein, cover capsule (2) top and breather (3) form airtight back air bag, it is inner to communicate by an independent tract (3-4) of establishing in the perforate on breather (3) inwall and the breather (3), airtight bonding common formation one blow vent of lower open end and breather (3) (2-2), and be provided with catch (2-1) in open end, catch (2-1) is shaped as semicircle, tongue shape, rail shape or any geometry, optional wherein a kind of, cover capsule (2), the independent tract (3-4) in the breather (3), gas tube (5-2) and pressure indicator (7-2) form the cover capsule gas fill port of an independent completion jointly;
Described breather (3), for being the multi-cavity road body of 100 °～180 ° of arcs, successively through sacculus (1) and cover capsule (2), its inside is provided with separate separately a plurality of independent tract, its front end is provided with a front opening (3-5), the inwall of its intermediate openings (3-6) is provided with brace table (3-8), its rear end is provided with an open rearward end (3-7), open rearward end (3-7) is connected with a dismountable plug (6), breather (3) sidewall is provided with a bypass channel opening and closely is connected with gas source connector (4), its sidewall rearward end is provided with gas tube (5), described gas tube (5) is designed to gas tube (5-1) and gas tube (5-2), described gas tube (5-1) and gas tube (5-2) are connected with pressure indicator (7-2) with the pressure indicator (7-1) that pressure indicator (7) is designed to respectively.
According to claim 1 described gastrointestinal endoscopy with two air bag intubating laryngeal mask airways, it is characterized in that: described independent tract, be designed to 2～8 independent tracts that connect, Gastrointestinal Endoscopes (8) enters human body esophagus and gastrointestinal section by the independent tract (3-1) that internal diameter is designed to 5mm ~ 20mm, being positioned at the independent tract (3-2) that breather (3) sidewall is provided with a branch is connected with gas source connector (4), and link to each other with respirator or anesthetic machine, blow vent by breather (3) middle part communicates with person's windpipe, forms airtight breathing path.
3. described gastrointestinal endoscopy is characterized in that with two air bag intubating laryngeal mask airways according to claim 1: described gastrointestinal endoscopy is with two air bag intubating laryngeal mask airways, and its material is medical grade silicon rubber or medical plastic cement.
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| CN2012104590723A CN102921083A (en) | 2012-11-14 | 2012-11-14 | Double-balloon laryngeal mask airway for gastroenterological endoscope examination |
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| CN2012104590723A CN102921083A (en) | 2012-11-14 | 2012-11-14 | Double-balloon laryngeal mask airway for gastroenterological endoscope examination |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203058A (en) * | 2013-04-12 | 2013-07-17 | 浙江曙光科技有限公司 | Multiple-cavity integrated laryngeal mask capable of being inserted by endoscope |
| CN104667396A (en) * | 2013-11-29 | 2015-06-03 | 广州耀远实业有限公司 | Novel safety three channel laryngeal mask |
| CN104998338A (en) * | 2015-07-13 | 2015-10-28 | 张敏 | Auxiliary air bag sleeve for gastroscopy |
| CN105561454A (en) * | 2016-01-28 | 2016-05-11 | 浙江曙光科技有限公司 | Drainage type bronchofiberscope laryngeal mask |
| CN106178209A (en) * | 2016-08-05 | 2016-12-07 | 罗强 | A kind of laryngeal mask airway device with transmission of video function |
| CN107174721A (en) * | 2017-07-03 | 2017-09-19 | 成都威力生生物科技有限公司 | A kind of pipe fitting on haemodialysis waterpipe and the pipeline |
| CN107737397A (en) * | 2017-11-29 | 2018-02-27 | 天津市塑料研究所有限公司 | The compound laryngeal mask respiratory system of zero dead space |
| CN108273171A (en) * | 2018-01-18 | 2018-07-13 | 葛俊辰 | Double-balloon laryngeal mask airway for gastroenterological endoscope examination |
| CN109675154A (en) * | 2017-10-19 | 2019-04-26 | 上海市第五人民医院 | A kind of laryngeal mask |
| CN110575592A (en) * | 2019-09-25 | 2019-12-17 | 夏敏 | Laryngeal mask with monitoring of perilaryngeal muscle relaxation and monitoring of backflow |
| WO2021158216A1 (en) * | 2020-02-05 | 2021-08-12 | Chang, Chia-Fang | Multi-tube adapter |
| CN113694331A (en) * | 2021-09-03 | 2021-11-26 | 无锡圣诺亚科技有限公司 | Air sac phlegm-sucking laryngeal mask |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103203058A (en) * | 2013-04-12 | 2013-07-17 | 浙江曙光科技有限公司 | Multiple-cavity integrated laryngeal mask capable of being inserted by endoscope |
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| CN104667396A (en) * | 2013-11-29 | 2015-06-03 | 广州耀远实业有限公司 | Novel safety three channel laryngeal mask |
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| CN104998338A (en) * | 2015-07-13 | 2015-10-28 | 张敏 | Auxiliary air bag sleeve for gastroscopy |
| CN105561454A (en) * | 2016-01-28 | 2016-05-11 | 浙江曙光科技有限公司 | Drainage type bronchofiberscope laryngeal mask |
| CN106178209A (en) * | 2016-08-05 | 2016-12-07 | 罗强 | A kind of laryngeal mask airway device with transmission of video function |
| CN107174721A (en) * | 2017-07-03 | 2017-09-19 | 成都威力生生物科技有限公司 | A kind of pipe fitting on haemodialysis waterpipe and the pipeline |
| CN109675154A (en) * | 2017-10-19 | 2019-04-26 | 上海市第五人民医院 | A kind of laryngeal mask |
| CN107737397A (en) * | 2017-11-29 | 2018-02-27 | 天津市塑料研究所有限公司 | The compound laryngeal mask respiratory system of zero dead space |
| CN108273171A (en) * | 2018-01-18 | 2018-07-13 | 葛俊辰 | Double-balloon laryngeal mask airway for gastroenterological endoscope examination |
| CN110575592A (en) * | 2019-09-25 | 2019-12-17 | 夏敏 | Laryngeal mask with monitoring of perilaryngeal muscle relaxation and monitoring of backflow |
| WO2021158216A1 (en) * | 2020-02-05 | 2021-08-12 | Chang, Chia-Fang | Multi-tube adapter |
| AU2020427543B2 (en) * | 2020-02-05 | 2023-03-16 | Joyeux Lab Company Limited | Multi-tube adapter |
| CN113694331A (en) * | 2021-09-03 | 2021-11-26 | 无锡圣诺亚科技有限公司 | Air sac phlegm-sucking laryngeal mask |
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Application publication date: 20130213 |
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| WD01 | Invention patent application deemed withdrawn after publication |