CN113350034A - Lower nasal meatus eustachian tube tympanum ventilation drainage tube - Google Patents
Lower nasal meatus eustachian tube tympanum ventilation drainage tube Download PDFInfo
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- CN113350034A CN113350034A CN202110611384.0A CN202110611384A CN113350034A CN 113350034 A CN113350034 A CN 113350034A CN 202110611384 A CN202110611384 A CN 202110611384A CN 113350034 A CN113350034 A CN 113350034A
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- tube
- eustachian tube
- eustachian
- meatus
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- 210000002388 eustachian tube Anatomy 0.000 title claims abstract description 93
- 210000000959 ear middle Anatomy 0.000 title claims abstract description 30
- 238000009423 ventilation Methods 0.000 title abstract description 30
- 230000014759 maintenance of location Effects 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 4
- 206010033078 Otitis media Diseases 0.000 abstract description 19
- 208000005923 otitis media with effusion Diseases 0.000 abstract description 8
- 208000024036 serous otitis media Diseases 0.000 abstract description 8
- 206010067764 Eustachian tube stenosis Diseases 0.000 abstract description 7
- 230000000306 recurrent effect Effects 0.000 abstract description 7
- 241000973497 Siphonognathus argyrophanes Species 0.000 abstract description 6
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 208000021126 eustachian tube disease Diseases 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 5
- 230000001684 chronic effect Effects 0.000 abstract description 4
- 239000003814 drug Substances 0.000 abstract description 4
- 210000001989 nasopharynx Anatomy 0.000 description 8
- 206010015543 Eustachian tube dysfunction Diseases 0.000 description 5
- 210000003800 pharynx Anatomy 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 208000024035 chronic otitis media Diseases 0.000 description 3
- 210000003454 tympanic membrane Anatomy 0.000 description 3
- 208000025301 tympanitis Diseases 0.000 description 3
- 108090000317 Chymotrypsin Proteins 0.000 description 2
- 208000017119 Labyrinth disease Diseases 0.000 description 2
- 208000027530 Meniere disease Diseases 0.000 description 2
- 229920002614 Polyether block amide Polymers 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 206010061373 Sudden Hearing Loss Diseases 0.000 description 2
- 238000002399 angioplasty Methods 0.000 description 2
- 229960002376 chymotrypsin Drugs 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000010339 dilation Effects 0.000 description 2
- 229940088597 hormone Drugs 0.000 description 2
- 239000005556 hormone Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002504 physiological saline solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 201000002014 Suppurative Otitis Media Diseases 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000002695 general anesthesia Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000008506 pathogenesis Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Acoustics & Sound (AREA)
- Biophysics (AREA)
- Otolaryngology (AREA)
- Psychology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Medicinal Preparation (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a lower nasal meatus eustachian tube tympanum ventilation drainage tube, which comprises an indwelling hose and a fixing piece; the retention hose is integrally in a circular tube shape, one end of the retention hose is provided with a lower nasal meatus tube orifice, the other end of the retention hose is provided with a tympanum tube orifice, the edge of the tympanum tube orifice is provided with two fixing pieces, and a certain angle (generally 90 degrees) is prefabricated between each fixing piece and the retention hose; the lower nasal meatus tube orifice is positioned in the near anterior nares of the lower nasal meatus, most of the indwelling hose is positioned in the eustachian tube, and the fixing piece is positioned at the tympanogram tube mouth of the tympanogram. The lower nasal meatus eustachian tube tympanogram ventilation drainage tube has good eustachian tube ventilation and drainage effects; the medicine can be injected, the air can be injected and the eustachian tube can be washed through the lower nasal meatus from the anterior naris, and the recovery condition of the eustachian tube can be observed from the anterior naris; can be used for treating chronic exudative otitis media, intractable recurrent secretory otitis media, various sequelae caused by Eustachian tube disorder, abnormal opening of Eustachian tube, and eustachian tube stenosis.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a lower nasal meatus eustachian tube tympanogram ventilation drainage tube.
Background
The eustachian tube is arranged on the upper part of the front wall of the tympanic cavity, one end of the eustachian tube enters the tympanic cavity from the front wall, the other end of the eustachian tube enters the nasopharynx, and is a channel for communicating the tympanic cavity with the nasopharynx, the channel is not only a necessary channel for maintaining the air pressure of the middle ear, but also a channel for discharging effusion of the tympanic cavity to the nasopharynx, plays an important role in the pathogenesis of secretory otitis media, and is one of important factors influencing the success rate of tympanoplasty, the position of the eustachian tube is hidden, and anatomical stenosis (the diameter is about 1mm) exists.
In the traditional myringotomy, the vent pipe is divided into a straight pipe type, a dumbbell type, an inclined opening type, a T type and the like according to the shape. The ventilating pipe is placed on the tympanic membrane for a long time, so that irreversible damage and even perforation of the tympanic membrane can be caused to the form of the tympanic membrane; the vent pipe is easy to block the pipe, is not beneficial to ventilation of the eustachian tube and the tympanic cavity, and is not easy to absorb the effusion in the tympanic cavity after the pipe is placed; in addition, the tympanostomy tube has the possibility of falling into the tympanic cavity; also, myringotomy has its limitations for persistent otitis media with secretion, as this problem may not be well addressed for eustachian tube dysfunction.
In 2010, European scientists begin to use balloon dilatation eustachian angioplasty for treating secretory otitis media, suppurative otitis media with merged eustachian tube dysfunction and the like, and the balloon dilatation eustachian angioplasty has good effects and has the characteristics of minimal invasion, easiness in operation, good safety and the like. However, the balloon dilatation tube is expensive and generally needs the general anesthesia operation to be completed; and the dilating tube must be taken out simultaneously after dilation, and the time can not be adjusted according to the disease condition of the patient; the dilation time is limited and the eustachian tube function of severe recurrent patients cannot be effectively improved.
The foregoing description is provided for general background information and is not admitted to be prior art.
Disclosure of Invention
The invention aims to provide a lower nasal meatus eustachian tube tympanogram ventilation drainage tube which can be used for treating chronic exudative otitis media, chronic otitis media operation accompanied with eustachian tube dysfunction, intractable recurrent secretory otitis media, various sequelae caused by eustachian tube disorder, abnormal opening of the eustachian tube, eustachian tube stenosis and the like.
The invention provides a lower nasal meatus eustachian tube tympanum ventilation drainage tube, which comprises an indwelling hose and a fixing piece; the retention hose is integrally in a circular tube shape, one end of the retention hose is provided with a lower nasal meatus tube orifice, the other end of the retention hose is provided with a tympanum tube orifice, two fixing pieces are arranged at the edges of the tympanum tube orifices, and a certain angle is prefabricated between each fixing piece and the retention hose; the lower nasal meatus tube orifice is positioned in a lower nasal meatus anterior naris, the remaining hose is mostly positioned in the eustachian tube, and the fixing piece is positioned at the eustachian tube tympanometry orifice of the tympanum.
Further, the two fixing pieces form an included angle of 90 degrees with the retention hose in the open state, and the two fixing pieces can also be in the closed state after being moved.
Further, two the stationary blade is axisymmetric, two stationary blade length is 3 mm.
Further, the indwelling hose and the fixing piece are connected in an integrated manner.
Furthermore, the mouth of the lower nasal passage on the indwelling hose is round and blunt, and the end of the fixing piece is round and blunt.
Furthermore, the outer side wall of the indwelling hose is provided with scale marks.
Further, the length of the indwelling hose is 8-10 cm.
Further, the inner diameter of the indwelling hose is greater than or equal to 0.5mm and smaller than 1mm, and the outer diameter is 1 mm.
Further, the fixing pieces are petal-shaped.
Furthermore, the number of the fixing pieces is 4, and the length of the fixing pieces is 2 mm.
The lower nasal passage eustachian tube tympanometry ventilation and drainage tube provided by the invention can be introduced into the eustachian tube from the eustachian tube tympanometry of the tympanitis at the same time of otitis media operation, is led out from the eustachian tube pharynx mouth of the side wall of the eustachian tube, enters the lower nasal passage at the same side from the back nostril, and has good ventilation and drainage effects of the eustachian tube, and the tube orifice of the lower nasal passage is arranged in the front nostril near the lower nasal passage and is arranged in the eustachian tube; the medicine can be injected, the air can be injected and the eustachian tube can be washed through the lower nasal meatus from the anterior naris, and the recovery condition of the eustachian tube can be observed from the anterior naris; after the patient is improved, the implanted lower nasal meatus eustachian tube tympanostomy ventilation drainage tube can be directly taken out from the anterior nostril; can be used for treating chronic exudative otitis media, chronic otitis media operation accompanied with eustachian tube dysfunction, intractable recurrent secretory otitis media, various sequelae caused by eustachian tube disorder, abnormal opening of eustachian tube, eustachian tube stenosis, etc.
Drawings
Fig. 1 is a schematic structural view of a lower nasal meatus eustachian tube tympanometry drainage tube according to a first embodiment of the invention.
FIG. 2 is a schematic view of another angle configuration of the draft tube of FIG. 1.
FIG. 3 is a schematic structural view of the fixing sheet of the draft tube of FIG. 1 in a closed state.
Fig. 4 is a schematic structural view of a lower nasopharynx tympanometry drainage tube according to a second embodiment of the present invention.
FIG. 5 is a schematic structural view of the fixing sheet of the draft tube of FIG. 4 in a closed state.
The reference numerals and components referred to in the drawings are as follows:
1. indwelling hose
11. Lower nasal meatus tube mouth
12. Tympanic cavity orifice
13. Graduation mark
2. Fixing sheet
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The terms first, second, third, fourth and the like in the description and in the claims of the present invention are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
First embodiment
Fig. 1 is a schematic structural view of a lower nasopharynx tympanometry drainage tube according to a first embodiment of the present invention, fig. 2 is a schematic structural view of another angle of the drainage tube in fig. 1, and fig. 3 is a schematic structural view of a fixing piece of the drainage tube in fig. 1 in a closed state. Referring to fig. 1, 2 and 3, the tympanogram ventilation drainage tube of the inferior nasal meatus eustachian tube provided by the embodiment of the invention comprises an indwelling hose 1 and a fixing piece 2; the indwelling hose 1 is integrally in a round tube shape, one end of the indwelling hose is provided with a lower nasal meatus tube orifice 11, the other end of the indwelling hose is provided with a tympanum tube orifice 12, two fixing pieces 2 are arranged at the edges of the tympanum tube orifice 12, and a certain angle is arranged between each fixing piece 2 and the indwelling hose 1; the lower nasal meatus tube orifice 11 is positioned in the lower nasal meatus (not shown in the figure), the indwelling hose 1 is mostly positioned in the eustachian tube (not shown in the figure), and the fixing piece 2 is positioned at the eustachian tube orifice (not shown in the figure) in the tympanic cavity.
The whole lower nasal meatus eustachian tube tympanogram ventilation drainage tube provided by the invention is in a T shape, and can be led into a eustachian tube from the eustachian tube tympanogram opening in the tympanogram during the otitis media operation, led out from the eustachian tube pharynx opening on the side wall of the eustachian tube and enter the lower nasal meatus on the same side from the back nostril, and the mouth 11 of the lower nasal meatus is arranged at the front end of the lower nasal meatus close to the front nostril. The lower nasal meatus eustachian tube tympanogram drainage tube can be used for spraying medicine to the tympanogram from the anterior nares through the lower nasal meatus tube orifice 11 (for example, chymotrypsin can be injected to treat refractory recurrent secretory otitis media, physiological saline can also be injected to flush the tympanogram, hormone can also be injected to treat inner ear diseases such as sudden deafness and Meniere disease); the indwelling hose 1 of the lower nasal meatus eustachian tube tympanometry ventilation drainage tube is arranged in the eustachian tube, which is beneficial to the recovery of the eustachian tube function of the eustachian tube stenosis and the abnormal opening of the eustachian tube for various eustachian tube diseases; after the illness is recovered, because the fixing piece 2 is movable, the lower nasal meatus orifice 11 of the lower nasal meatus eustachian tube tympanum ventilation drainage tube can be directly clamped by the vascular forceps from the anterior nasal meatus, and the lower nasal meatus orifice is taken out, so that the operation is convenient.
As shown in fig. 1, the two fixing pieces 2 form an included angle of 90 ° with the indwelling hose 1 in the open state, and the two fixing pieces 2 may be in the closed state after being moved. The two fixing pieces 2 are in axial symmetry, and the length of each fixing piece 2 is 3 mm; the two fixing pieces 2 can be clamped at the mouth of the eustachian tube in the tympanic cavity in an opening state and are used for preventing the lower nasal meatus eustachian tube and the tympanogram ventilation drainage tube from falling off from the eustachian tube. In addition, the indwelling hose 1 and the fixing piece 2 are connected by integral molding.
The indwelling hose 1 and the fixing piece 2 can be made of medical silica gel, PVC, PA or polytetrafluoroethylene materials and are placed in the body for a long time (half a year to 1 year). The material of the PEBAX (block polyether amide resin) which can not penetrate X rays can also be adopted, the position of the lower nasal meatus eustachian tube tympanum ventilation drainage tube can be accurately positioned through a radiology department after operation, the follow-up visit is convenient, and the use for patients is safer.
As shown in fig. 1, the lower nasal meatus orifice 11 of the indwelling hose 1 is round and blunt, and the end of the fixing piece 2 is round and blunt. The round blunt design can reduce the harm to the body.
The outer side wall of the indwelling hose 1 is provided with scale marks 13 which can be used for determining the depth of the indwelling hose.
Specifically, the length of the indwelling hose 1 is 8-10cm, the inner diameter is greater than or equal to 0.5mm and smaller than 1mm, and the outer diameter is 1 mm.
Second embodiment
The lower nasal meatus eustachian tube tympanometry ventilation drainage tube that this embodiment provided is the same with the lower nasal meatus eustachian tube tympanometry ventilation drainage tube that first embodiment provided, and the difference lies in the shape of stationary blade 2, and second embodiment stationary blade 2 is the petal form, and the number of stationary blade 2 is 4.
Fig. 4 is a schematic structural view of a lower nasopharynx tympanometry drainage tube according to a second embodiment of the present invention, and fig. 5 is a schematic structural view of a fixing piece of the drainage tube in fig. 4 in a closed state. As shown in fig. 4 and 5, the fixing pieces 2 provided in this embodiment are petal-shaped, and the number of the fixing pieces 2 is 4, and the length thereof is 2 mm.
It should be noted that, the petal-shaped design of the fixing piece 2 is in a core type (prefabricated before) in the initial state, on one hand, the lower nasal meatus eustachian tube tympanometry ventilation drainage tube can be led into the eustachian tube from the eustachian tube mouth in the tympanitis chamber during the otitis media operation and led out from the eustachian tube mouth, and enters the lower nasal meatus on the same side from the posterior naris, and the lower nasal meatus tube mouth 11 is arranged at the front end of the lower nasal meatus as in the first embodiment; on the other hand, the eustachian tube and tympanic cavity ventilation and drainage tube of the lower nasal meatus can be reversely introduced into the tympanic cavity from the eustachian tube and the pharyngeal orifice of the lateral wall of the nasopharynx on the same side from the nasoscope through the posterior nostril; then the stamen is flushed by normal saline to become petal shape again.
Based on the above description, the present invention has the following advantages:
1. the lower nasal meatus eustachian tube tympanogram ventilation drainage tube provided by the invention is integrally T-shaped, can be guided into the eustachian tube from the eustachian tube tympanogram opening in the tympanogram during the operation of otitis media, is led out from the eustachian tube pharynx opening on the side wall of the eustachian tube, enters the lower nasal meatus on the same side from the back nostril, and the mouth 11 of the lower nasal meatus is arranged at the front end of the lower nasal meatus close to the front nostril. The lower nasal meatus eustachian tube tympanogram drainage tube can be used for spraying medicine to the tympanogram from the anterior nares through the lower nasal meatus tube orifice 11 (for example, chymotrypsin can be injected to treat refractory recurrent secretory otitis media, physiological saline can also be injected to flush the tympanogram, hormone can also be injected to treat inner ear diseases such as sudden deafness and Meniere disease); the indwelling hose 1 of the lower nasal meatus eustachian tube tympanometry ventilation drainage tube is arranged in the eustachian tube, which is beneficial to the recovery of the eustachian tube function of the eustachian tube stenosis and the abnormal opening of the eustachian tube for various eustachian tube diseases; after the illness is recovered, because the fixing piece 2 is movable, the lower nasal meatus orifice 11 of the lower nasal meatus eustachian tube tympanum ventilation drainage tube can be directly clamped by the vascular forceps from the anterior nasal meatus, and the lower nasal meatus orifice is taken out, so that the operation is convenient.
2. The lower nasal meatus eustachian tube tympanogram ventilation drainage tube provided by the invention is arranged in the eustachian tube, so that the ventilation of the tympanogram is ensured, and the function recovery of the eustachian tube is assisted; can be used for treating chronic exudative otitis media, chronic otitis media operation accompanied with eustachian tube dysfunction, intractable recurrent secretory otitis media, various sequelae caused by eustachian tube disorder, abnormal opening of eustachian tube, eustachian tube stenosis, etc.
3. The invention provides a lower nasal meatus eustachian tube tympanometry ventilation drainage tube, and the petal-shaped design of the fixing piece 2, the initial state is a flower core type (prefabricated before), on one hand, the lower nasal meatus eustachian tube tympanometry ventilation drainage tube can be led into a eustachian tube from the eustachian tube mouth in the tympanitis chamber at the same time of otitis media operation, led out from the eustachian tube throat, and enters the lower nasal meatus at the same side from the posterior naris, and the lower nasal meatus mouth is arranged at the front end of the lower nasal meatus; on the other hand, the eustachian tube and tympanic cavity ventilation and drainage tube of the lower nasal meatus can be reversely introduced into the tympanic cavity from the eustachian tube and the pharyngeal orifice of the lateral wall of the nasopharynx on the same side from the nasoscope through the posterior nostril; then, the pistils are flushed by normal saline to become petal-shaped again; can be used for outpatient service during non-otitis media operation.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The utility model provides a lower nasal passage eustachian tube tympanogram drainage tube of ventilating which characterized in that: comprises a retention hose (1) and a fixing piece (2); the indwelling hose (1) is integrally in a circular tube shape, one end of the indwelling hose (1) is provided with a lower nasal meatus tube orifice (11), the other end of the indwelling hose is provided with a tympanic tube orifice (12), two fixing pieces (2) are arranged at the edges of the tympanic tube orifice (12), and a certain angle is prefabricated between each fixing piece (2) and the indwelling hose (1);
the lower nasal meatus tube orifice (11) is positioned in a lower nasal meatus near anterior nares, the remaining hose (1) is mostly positioned in the eustachian tube, and the fixing piece (2) is positioned at the eustachian tube tympanometry orifice of the tympanum.
2. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: the included angle that appears between two stationary blade (2) under the open mode and keep somewhere hose (1) is 90, two stationary blade (2) also can be closed state after the activity.
3. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: two stationary blade (2) are axisymmetric, two stationary blade (2) length is 3 mm.
4. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: the indwelling hose (1) and the fixing piece (2) are connected in an integrated forming way.
5. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: the lower nasal meatus tube orifice (11) on the indwelling hose (1) is in a round blunt shape, and the end part of the fixing piece (2) is in a round blunt shape.
6. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: the outer side wall of the indwelling hose (1) is provided with scale marks (13).
7. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: the length of the indwelling hose (1) is 8-10 cm.
8. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: the inner diameter of the indwelling hose (1) is more than or equal to 0.5mm and less than 1mm, and the outer diameter is 1 mm.
9. The lower meatus eustachian tube tympanometry drainage tube of claim 1, wherein: the fixing piece (2) is petal-shaped.
10. The lower meatus eustachian tube tympanometry drainage tube of claim 7, wherein: the number of the fixing pieces (2) is 4, and the length of the fixing pieces is 2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110611384.0A CN113350034A (en) | 2021-06-01 | 2021-06-01 | Lower nasal meatus eustachian tube tympanum ventilation drainage tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110611384.0A CN113350034A (en) | 2021-06-01 | 2021-06-01 | Lower nasal meatus eustachian tube tympanum ventilation drainage tube |
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| Publication Number | Publication Date |
|---|---|
| CN113350034A true CN113350034A (en) | 2021-09-07 |
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|---|---|---|---|
| CN202110611384.0A Pending CN113350034A (en) | 2021-06-01 | 2021-06-01 | Lower nasal meatus eustachian tube tympanum ventilation drainage tube |
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| CN (1) | CN113350034A (en) |
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Application publication date: 20210907 |