CN109481805A - A kind of intranasal laryngeal airway conduit - Google Patents

A kind of intranasal laryngeal airway conduit Download PDF

Info

Publication number
CN109481805A
CN109481805A CN201811318529.2A CN201811318529A CN109481805A CN 109481805 A CN109481805 A CN 109481805A CN 201811318529 A CN201811318529 A CN 201811318529A CN 109481805 A CN109481805 A CN 109481805A
Authority
CN
China
Prior art keywords
air bag
snorkel
main body
conduit
intranasal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811318529.2A
Other languages
Chinese (zh)
Inventor
于洪涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou First Peoples Hospital
Original Assignee
Hangzhou First Peoples Hospital
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hangzhou First Peoples Hospital filed Critical Hangzhou First Peoples Hospital
Priority to CN201811318529.2A priority Critical patent/CN109481805A/en
Publication of CN109481805A publication Critical patent/CN109481805A/en
Pending legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003Accessories therefor, e.g. sensors, vibrators, negative pressure
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2202/00Special media to be introduced, removed or treated
    • A61M2202/02Gases
    • A61M2202/0208Oxygen

Landscapes

  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The invention discloses a kind of intranasal laryngeal airway conduits, airway includes main body snorkel, conduit throat air bag, catheter tip air bag, conduit throat air bag and the catheter tip air bag are connected to main body snorkel, snorkel remote stomidium is offered on main body snorkel pipeline section between the catheter tip air bag and conduit throat air bag, the conduit throat air bag gas is completely in the arc shape of expansion, and the tail portion of the main body snorkel is the inflating port for connecting ventilator and aerostatic press;It is effectively applicable to laryngeal mask and the indeterminable teeth clenched patient of trachea cannula, auxiliary control patient respiratory and a kind of clinical airway equipment for first aid.

Description

A kind of intranasal laryngeal airway conduit
Technical field
The present invention relates to technical field of medical equipment, specially a kind of intranasal laryngeal airway conduit.
Background technique
It is insufficient in order to solve endotracheal intubation and mask ventilation in clinical operation, there is a kind of novel respiratory tract work Have " laryngeal mask ".Laryngeal mask ensures respiration unobstructed, avoids using that simply, can establish artificial airway, and placement success rate height rapidly Throat and tunica mucosa tracheae damage, are chiefly used in patient, the difficulty of patient with general anesthesia, emergency department, ICU and each department's first aid and recovery Air flue patient.Laryngeal mask is in clinical use, and the remote stomidium of enclosure portion, which occupies, to be swallowed in space and respiratory tract, and tube body is by oral cavity It is extend out to human external, oral cavity, pharynx, respiratory tract form a unobstructed airflow channel oxygen supply, and laryngeal mask is to protrude into pharynx along oral cavity And in respiratory tract, most Anesthetic Patients can be suitable for, when facing teeth clenched patient, the way of Anesthetist is logical It crosses instrument or manpower manual to open patient's supporting oral cavity, is easily damaged patient teeth in this way, or even cause gingival lesions flesh and blood It is fuzzy, secondary injury can be not only brought to patient, but also the problem of the patient having is due to temporomandibular joint, oral cavity of not opening at all. At this moment Anesthetist needs Bronchofiberscope to guide nasal trachea cannula, extend intubation rescue time, reduce the success rate of rescue, because This needs to assist a kind of intranasal of control and first aid to solve laryngeal mask and the indeterminable teeth clenched patient of trachea cannula Laryngeal airway equipment.
Summary of the invention
The purpose of the invention is to provide a kind of intranasal laryngeal airway conduit, it is effectively applicable to laryngeal mask and trachea cannula not The teeth clenched patient that can solve, auxiliary control patient respiratory and a kind of clinical airway equipment for first aid.
In order to achieve the above-mentioned object of the invention, the invention adopts the following technical scheme: a kind of intranasal laryngeal airway conduit, leads to Airway includes main body snorkel, conduit throat air bag, catheter tip air bag, conduit throat air bag and the catheter tip Air bag is connected to main body snorkel, is opened on the main body snorkel pipeline section between the catheter tip air bag and conduit throat air bag Equipped with snorkel remote stomidium, the conduit throat air bag gas is completely in the arc shape of expansion, and the tail portion of the main body snorkel is to connect Connect the inflating port of ventilator and aerostatic press.
Preferably, the arc shape after the conduit throat air bag gas is full is flat elliptic, and the shape and oropharynx physiology Curve is adapted.
Preferably, the main body snorkel is medical high polymer hose.
Preferably, the catheter tip air bag is the esophagus cuff being filled in esophagus, and conduit throat air bag is to fill out Fill the oropharynx cuff in oropharynx.
Preferably, catheter tip balloon contacts face is the conical surface of arc.
Preferably, four snorkel remote stomidiums, and snorkel distal end are at least offered on the main body snorkel pipeline section Hole uniformly surrounds.
Preferably, drainage tube remote stomidium is provided in the catheter tip air bag.
Preferably, drainage tube is mounted in the drainage tube remote stomidium, and the drainage tube prolongs along main body ventilation pipeline It extends to outside tail portion.
Preferably, charging valve hose is connected on the main body snorkel.
Compared with prior art, using a kind of intranasal laryngeal airway conduit of above-mentioned technical proposal, have following beneficial Effect:
First aid, ICU, operation, especially some teeth clenched patients because of situations such as disease or drug poisoning, thus occur Teeth clenched, if can not be protruded into throat by oral cavity using traditional laryngeal mask and trachea cannula, patient respiratory difficulty, Anoxic, operation can not be successfully progress, if being directed to this trismoid patient according to traditional mode, Anesthetist can pass through hand Art instrument or manpower manual open patient's supporting oral cavity, are easily damaged patient teeth in this way, or even cause gingival lesions flesh and blood It is fuzzy, secondary injury can be not only brought to patient but also influences Anesthetist's operation phychology, increase anesthesia workload, this programme In, Anesthetist can directly protrude into main body admittance pipe along patient's nasal cavity according to physiology of the nose curve, before inflation, conduit throat Without gas in air bag, catheter tip air bag, in its natural state in expandable contraction-like, in operation, catheter tip air bag is first It first stretches in human body esophagus, therewith, conduit throat air bag stretches in oropharynx, in the present solution, conduit is medical height Molecule hose, can reduce human body sense of discomfort to the full extent, and Anesthetist adjusts conduit throat air bag, catheter tip air bag It behind the position in oropharynx and esophagus, is inflated to main body snorkel, supplies oxygen demand to meet patient, conveying gas is oxygen Gas, gas are first filled with to catheter tip air bag, and catheter tip air bag gas, which is completely heaved, opens epiglottis support, due to the work of air pressure With catheter tip balloon surface is fitted tightly over esophageall obstruetion on esophagus tubing, continues to convey gas, gas into air bag Oral pharynx passageway is blocked into conduit throat air bag, Qi Man rear tube throat air bag heaves arc-shaped shape, contradicts in oral pharynx passageway Internal congestion, the conduit throat air bag of arc shape can satisfy the physiological curve of oropharynx, increase the airtightness of conduit throat air bag, face In bed, when extraneous gas conveying device adds air into main body snorkel, air pressure is not easy excessive, it may be assumed that air pressure indication range is protected It holds: 25cmH2It is best with gastight barometric minimum within 0.Conduit throat air bag forms one high volume low-pressure cavity Laryngeal tissue ischemic necrosis is prevented, gas makes conduit throat air bag, catheter tip air bag forms a closed gas exchanges Space, and the snorkel remote stomidium being located between two air bags is connected to respiratory tract, and oxygen, oxygen are conveyed in external persistent guide pipe Gas can be entered respiratory tract for patient respiratory needs, patients with respiratory tract, snorkel remote stomidium and main body by snorkel remote stomidium Snorkel forms unobstructed airflow channel, in the patient of patient with general anesthesia, emergency department, ICU and each department's first aid and recovery The teeth clenched situation of appearance can be resolved by intranasal laryngeal airway conduit, be clinically to assist control and urgency at present The new airway equipment of the one kind rescued.
Detailed description of the invention
Fig. 1 is that a kind of intranasal laryngeal airway conduit gas of the present invention expires the structural schematic diagram under state;
Fig. 2 is the structural schematic diagram under a kind of intranasal laryngeal airway duct cavity state of the present invention;
Fig. 3 is the structural schematic diagram of catheter tip inside air bag in the present embodiment;
Fig. 4 is intranasal laryngeal airway conduit clinical use schematic diagram of the present invention.
Appended drawing reference: 1, main body snorkel;2, conduit throat air bag;3, catheter tip air bag;30, the conical surface;4, snorkel Remote stomidium;5, inflating port;6, drainage tube;7, charging valve hose.
Specific embodiment
The present invention is described further with reference to the accompanying drawing.
A kind of intranasal laryngeal airway conduit as shown in Figures 1 to 4, airway include main body snorkel 1, conduit throat gas Capsule 2, catheter tip air bag 3, conduit throat air bag 2 and catheter tip air bag 3 are connected to main body snorkel 1, catheter tip gas Snorkel remote stomidium 4,2 gas of conduit throat air bag are offered on 1 pipeline section of main body snorkel between capsule 3 and conduit throat air bag 2 The full arc shape in expansion, the tail portion of main body snorkel 1 are the inflating port 5 for connecting ventilator and aerostatic press.
As shown in Figure 1, in first aid, ICU art, especially some teeth clenched patients, due to disease or drug poisoning etc. Situation, thus lockjaw, if can not be protruded into throat by oral cavity using traditional laryngeal mask and trachea cannula, Anesthetic Patients expiratory dyspnea, anoxic, operation can not be successfully progress, if suffered from according to traditional mode for this trismoid Person, Anesthetist can be held patient's supporting oral cavity by surgical instrument or manpower manual, be easily damaged patient teeth in this way, very To causing gingival lesions badly mutilated, secondary injury can be not only brought to patient but also influences Anesthetist's operation phychology, is increased Surgical work amount, in the present solution, Anesthetist can directly stretch main body snorkel 1 along patient's nasal cavity according to physiology of the nose curve Enter, before inflation, without gas in conduit throat air bag 2, catheter tip air bag 3, in its natural state in expandable contraction-like, behaviour In work, catheter tip air bag 3 is stretched to first in human body esophagus, and therewith, conduit throat air bag 2 stretches in oropharynx, Yu Benfang In case, conduit is medical macromolecule hose, can reduce human body sense of discomfort to the full extent, and Anesthetist adjusts conduit Throat's air bag 2, catheter tip air bag 3 are inflated behind the position in oropharynx and esophagus to main body snorkel 1, are suffered to meet Person supplies oxygen demand, and conveying gas is oxygen, and gas is first filled with to catheter tip air bag 3, and 3 gas of catheter tip air bag is completely heaved Epiglottis support is opened, due to the effect of air pressure, 3 surface of catheter tip air bag, which is fitted tightly on esophagus tubing, hinders esophagus Plug, persistent guide pipe is interior to convey gas, and gas enters conduit throat air bag 2 and blocks oral pharynx passageway, Qi Man rear tube throat gas Capsule 2 heaves arc-shaped shape, contradicts in oral pharynx passageway internal congestion, the conduit throat air bag 2 of arc shape can satisfy the physiology of oropharynx Curve, increase conduit throat air bag 2 airtightness, clinic in, extraneous gas conveying device adds air into main body snorkel 1 When, air pressure is not easy excessive, it may be assumed that air pressure indication range is maintained at: 25cmH2Within 0, be with gastight barometric minimum it is best, lead Pipe throat air bag 2, which forms one high volume low-pressure cavity, prevents laryngeal tissue ischemic necrosis, gas make conduit throat air bag 2, Catheter tip air bag 3 forms a closed gas exchanges space, and the snorkel remote stomidium 4 being located between two air bags with exhale Road connection is inhaled, oxygen is conveyed in external persistent guide pipe, oxygen can be entered respiratory tract for patient respiratory by snorkel remote stomidium 4 It needs, patients with respiratory tract, snorkel remote stomidium 4 and main body snorkel 1 form unobstructed airflow channel, suffer from general anesthesia The teeth clenched situation occurred in the patient of person, emergency department, ICU and each department's first aid and recovery, can pass through nose laryngeal airway Conduit is resolved, and is the airway equipment that clinically auxiliary controls at present and one kind of first aid is new.
Arc shape after 2 gas of conduit throat air bag is full is flat elliptic, and this spherical is adapted with oropharynx physiological curve; Such design is to meet the physiological curve around oropharynx when Anesthetist operates and need very accurately by larynx conduit, nose Larynx conduit protrudes into oropharynx designated position, if excessively deviateing oropharynx designated position, balloon occlusion and ventilatory effect are bad, is easy Lead to patient's anoxic, even damage oropharynx tissue, cause ischemic, again and again extract, it is quiet enter to patient to cause secondary injury, it is right And workload more demanding in the surgical experience of Anesthetist increases, operating difficulties;The conduit throat air bag of flat elliptic 2 can dispose in oropharynx any position, and radian coverage area is also larger, also larger to the bearing area of oropharynx tissue, operation Simply, especially in acute disease, first aid, Anesthetist can quickly dispose nose laryngeal airway conduit, auxiliary control breathing.
Main body snorkel 1 is medical high polymer hose, considers that cost, main body snorkel 1 are medical silica-gel, on the one hand It can be easily placed in along nasal cavity and oropharynx physiological curve, then and, reduce human body sense of discomfort.
Catheter tip air bag 3 is the esophagus cuff being filled in esophagus, and conduit throat air bag 2 is the oropharynx for being filled in oropharynx Cuff;Compared to laryngeal mask, the cover of laryngeal mask is to be covered in swallow in space and respiratory tract, and gas is conveyed by intraoral conduit In laryngeal mask cover, then be delivered in respiratory tract and supplied oxygen by cover remote stomidium, until and in the present invention, in order to prevent gas through air bag into Entering esophagus reduces oxygen-supplying amount, is blocked esophagus and oropharynx by esophagus cuff and oropharynx cuff, two air bags form closed friendship Space is changed, and oxygen is then entered in respiratory tract by the snorkel remote stomidium 4 between two air bags, meets patient's oxygen to the full extent Gas demand.
3 contact surface of catheter tip air bag is the conical surface 30 of arc;When Anesthetist protrudes into conduit into nasal cavity, catheter tip The arc conical surface 30 of air bag 3 can reduce moving resistance, easy to operate, will not stab nasal cavity, oropharynx, the tissue in esophagus.
Four snorkel remote stomidiums 4 are at least offered on 1 pipeline section of main body snorkel, and the snorkel remote stomidium 4 uniformly encloses Around;Expiratory dyspnea patient such as clinically, oxygen-supplying amount is larger, and what four snorkel remote stomidiums 4 were capable of big flux will be in conduit Oxygen be delivered in respiratory tract.
Drainage tube remote stomidium is provided in catheter tip air bag 3;Drainage tube 6 is mounted in drainage tube remote stomidium, and this draws Flow tube 6 extends to outside tail portion along 1 pipeline of main body snorkel;In art, esophagus is wriggled the interior solution, molten in gastric reflux stomach function regulating of secretion Liquid can be sucked out by drainage tube 6, prevent from accidentally inhaling dangerous.
Charging valve hose 7 is connected on main body snorkel 1;Charging valve hose 7 to conduit throat air bag 2 and is led respectively Tip end air bag 3 is inflated.
It is the preferred embodiment of the present invention above, does not depart from original of the invention for those of ordinary skill in the art Under the premise of reason, several variations and modifications can also be made, these also should be regarded as protection scope of the present invention.

Claims (9)

1. a kind of intranasal laryngeal airway conduit, it is characterised in that: airway includes main body snorkel (1), conduit throat air bag (2), catheter tip air bag (3), conduit throat air bag (2) and the catheter tip air bag (3) with main body snorkel (1) It is connected to, offers ventilation on main body snorkel (1) pipeline section between the catheter tip air bag (3) and conduit throat air bag (2) Pipe remote stomidium (4), the conduit throat air bag (2) gas are completely in the arc shape of expansion, and the tail portion of the main body snorkel (1) is to connect Connect the inflating port (5) of ventilator and aerostatic press.
2. a kind of intranasal laryngeal airway conduit according to claim 1, it is characterised in that: conduit throat air bag (2) Arc shape after gas is full is flat elliptic, and the shape is adapted with oropharynx physiological curve.
3. a kind of intranasal laryngeal airway conduit according to claim 1, it is characterised in that: the main body snorkel (1) is Medical high polymer hose.
4. a kind of intranasal laryngeal airway conduit according to claim 1, it is characterised in that: the catheter tip air bag (3) For the esophagus cuff being filled in esophagus, conduit throat air bag (2) is the oropharynx cuff for being filled in oropharynx.
5. a kind of intranasal laryngeal airway conduit according to claim 4, it is characterised in that: the catheter tip air bag (3) Contact surface is the conical surface (30) of arc.
6. a kind of intranasal laryngeal airway conduit according to claim 1, it is characterised in that: main body snorkel (1) pipe Four snorkel remote stomidiums (4) are at least offered in section, and the snorkel remote stomidium (4) uniformly surrounds.
7. a kind of intranasal laryngeal airway conduit according to claim 1, it is characterised in that: the catheter tip air bag (3) Inside it is provided with drainage tube remote stomidium.
8. a kind of intranasal laryngeal airway conduit according to claim 7, it is characterised in that: peace in the drainage tube remote stomidium It is equipped with drainage tube (6), and the drainage tube (6) extends to outside tail portion along main body snorkel (1) pipeline.
9. a kind of intranasal laryngeal airway conduit according to claim 1, it is characterised in that: on the main body snorkel (1) It is connected with charging valve hose (7).
CN201811318529.2A 2018-11-07 2018-11-07 A kind of intranasal laryngeal airway conduit Pending CN109481805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811318529.2A CN109481805A (en) 2018-11-07 2018-11-07 A kind of intranasal laryngeal airway conduit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811318529.2A CN109481805A (en) 2018-11-07 2018-11-07 A kind of intranasal laryngeal airway conduit

Publications (1)

Publication Number Publication Date
CN109481805A true CN109481805A (en) 2019-03-19

Family

ID=65694061

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811318529.2A Pending CN109481805A (en) 2018-11-07 2018-11-07 A kind of intranasal laryngeal airway conduit

Country Status (1)

Country Link
CN (1) CN109481805A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111569213A (en) * 2020-05-18 2020-08-25 浙江省科技宣传教育中心 Safe type endotracheal tube subassembly structure
CN111632247A (en) * 2020-06-10 2020-09-08 东营市人民医院 Gastrointestinal surgery honeycomb duct
CN114748768A (en) * 2021-09-13 2022-07-15 王江河 Air sac type dilating catheter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402717A (en) * 1965-08-12 1968-09-24 George O. Doherty Endotracheal tube with valved balloon having a removable inflation stylet insert therein
US3565079A (en) * 1968-04-09 1971-02-23 Richard Robert Jackson Self-inflating endotracheal tube
JPH10179677A (en) * 1996-12-24 1998-07-07 Noboru Sato Air way in esophagus for first aid resuscitation
CN201798985U (en) * 2010-04-20 2011-04-20 蔡铁良 Esophagus and nasopharyngeal cavity catheter
CN206745712U (en) * 2016-12-15 2017-12-15 张岳农 A kind of intranasal esophagus blocks laryngeal mask

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3402717A (en) * 1965-08-12 1968-09-24 George O. Doherty Endotracheal tube with valved balloon having a removable inflation stylet insert therein
US3565079A (en) * 1968-04-09 1971-02-23 Richard Robert Jackson Self-inflating endotracheal tube
JPH10179677A (en) * 1996-12-24 1998-07-07 Noboru Sato Air way in esophagus for first aid resuscitation
CN201798985U (en) * 2010-04-20 2011-04-20 蔡铁良 Esophagus and nasopharyngeal cavity catheter
CN206745712U (en) * 2016-12-15 2017-12-15 张岳农 A kind of intranasal esophagus blocks laryngeal mask

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111569213A (en) * 2020-05-18 2020-08-25 浙江省科技宣传教育中心 Safe type endotracheal tube subassembly structure
CN111632247A (en) * 2020-06-10 2020-09-08 东营市人民医院 Gastrointestinal surgery honeycomb duct
CN114748768A (en) * 2021-09-13 2022-07-15 王江河 Air sac type dilating catheter

Similar Documents

Publication Publication Date Title
JP3251589B2 (en) Oropharyngeal ventilation tube with sleeves
JP2931988B2 (en) Artificial respirator
US6626169B2 (en) Anatomical airway ventilation intubating and resuscitation device
US4848331A (en) Apparatus and method for pulmonary ventilation of a patient concurrent with fiberoptic respiratory tract examination and tracheal intubation
CN104994899A (en) Reversible airway device and related method for ventilating a subject
CN207520428U (en) Laryngeal mask and assisted respirator
CN102921083A (en) Double-balloon laryngeal mask airway for gastroenterological endoscope examination
CN109481805A (en) A kind of intranasal laryngeal airway conduit
CN109939320A (en) A kind of nasopharyngeal airway road
JP2007521044A (en) Combination of artificial airway device and esophageal obturator
JP3503730B2 (en) Emergency Resuscitation Esophageal Airway
CN208081628U (en) A kind of double balloon oropharyngeal airway
CN202961408U (en) Dual-airbag laryngeal mask airway for gastrointestinal endoscopy
CN108452411A (en) Visual intubatton type positive pressure mask and respiratory system
CN205569479U (en) Air -breather based on esophagus shutoff gastrointestinal decompression
CN209734689U (en) Visual intubation type positive pressure mask and respiratory system
CN201832255U (en) Laryngeal mask for blocking esophagus
CN107308532A (en) Oropharyngeal airway with closed airbag
CN2910241Y (en) Novel two-way throat cover for respiratory tract and esophagus
CN209221233U (en) A kind of double bolloon Medical throat cover
CN204319455U (en) Endoscopy anesthesia laryngeal mask
CN202777407U (en) Esophagus and throat dual chamber closing ventilation conduit
CN205127036U (en) Disposable two -chamber laryngeal mask air flue pipe
CN216394980U (en) Anti-biting flat tracheal cannula
CN215135195U (en) Air duct capable of introducing oxygen

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190319

RJ01 Rejection of invention patent application after publication