CN105496615A - Covered airway stent - Google Patents
Covered airway stent Download PDFInfo
- Publication number
- CN105496615A CN105496615A CN201610048332.6A CN201610048332A CN105496615A CN 105496615 A CN105496615 A CN 105496615A CN 201610048332 A CN201610048332 A CN 201610048332A CN 105496615 A CN105496615 A CN 105496615A
- Authority
- CN
- China
- Prior art keywords
- airway stent
- skeleton
- overlay film
- stent
- airway
- 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
Links
Classifications
-
- 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
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- 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
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0069—Three-dimensional shapes cylindrical
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0095—Saddle-shaped
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
Abstract
The invention relates to a covered airway stent. The covered airway stent is characterized by comprising a framework of a tubular structure or a superior-arc-shaped structure and a membrane structure covering the outer wall of the framework, and an expansion portion is arranged at each of two ends of the framework. The covered airway stent can be prevented from displacement in a trachea to a certain degree and is capable of preventing retention of airway secretion and meeting the seven requirements of a satisfactory airway stent completely, thereby being a product with practical value and popularization value.
Description
Technical field
The present invention relates to a kind of overlay film airway stent, belong to medical instruments field.
Background technology
Benign tracheobronchial stenosis is a kind of common disease threatening patient vitals, there is no desirable Therapeutic Method at present, is the important method saving patient vitals at the tracheal strips placing rack of patient.Abroad desirable airway stent is defined as follows: 1. easily place; 2. ischesis is not caused; 3. cough is not caused; 4. the thin internal diameter of cradle wall is large; 5. be not shifted; 6. easily take out; 7. economical cheap.Airway stent comparatively conventional at present has three kinds:
The first is metal rack, it meets above-mentioned 1. 2. 3. 4. 5. 7. item requirement, but very crucial the 6. item can not meet, standing time is slightly long just can not take out, this is unacceptable to benign tracheobronchial stenosis patient, therefore has forbidden placing metal rack benign tracheobronchial stenosis patient at present.
The second is metal film coated support, and it meets 1. 3. 4. 6. 7. item requirement, but the 2. 5. item can not meet, especially the 5. item displacement problem this support cannot be applied in Most patients.
The third is silicon stent, only meets 3. 6. two requirements, but the of most critical 1. item can not meet, namely silicon stent must be placed by Rigid bronchoscope under general anesthesia, makes it be difficult at home popularize; In addition 7. 5. 4. article also can not to meet, and silicon stent wall thickness, relative tubular diameter are little, and high in tracheal strips displacement rate, often cause Endodontic failure, and in addition, the domestic current price of silicon stent is also very expensive.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of overlay film airway stent substantially meeting desirable airway stent requirements.
For achieving the above object, the present invention by the following technical solutions: a kind of overlay film airway stent, is characterized in that: comprise a skeleton and in tubular construction and overlay on membrane structure on described skeleton outer wall, be respectively arranged with a bulge at the two ends of described skeleton.
A kind of overlay film airway stent, is characterized in that: comprise a skeleton and in excellent arc structure and overlay on membrane structure on described skeleton outer wall, be respectively arranged with a bulge at the two ends of described skeleton.
Described bulge 0.5 ~ 1mm larger than the diameter of the main paragraph of described skeleton, the length of described bulge is 5 ~ 6mm.
At the outer surface of described membrane structure, multiple non-slip process is set.
Described membrane structure exceeds the end 1 ~ 1.5mm of described skeleton.
Described tubular structure is woven by niti-shaped memorial alloy silk material and forms.
Described membrane structure adopts pellosil.
The two ends of described skeleton adopt closing-in structure.
Described skeleton both ends open place is provided with bracing wire.
The central angle of excellent convex structure is 240 °.
The present invention is owing to taking above technical scheme, and it has the following advantages: 1, the present invention arranges a bulge, therefore, it is possible to prevent airway stent to be subjected to displacement in trachea to a certain extent respectively because of the two ends at skeleton.2, the present invention owing to being provided with multiple non-slip process on the outer surface of membrane structure, therefore, it is possible to prevent airway stent to be subjected to displacement in trachea further.3, skeleton of the present invention is woven by niti-shaped memorial alloy silk material and forms, and under external force, by its reduced to less than 50% of original size, support can be convenient to send into air flue, and after support feeding air flue, can return to original size by self-expansion.4, the present invention is due to the two ends employing closing-in structure of skeleton, therefore, it is possible to prevent from stimulating tracheal wall to produce granulation tissue.5, the present invention exceeds the end 1 ~ 1.5mm of skeleton due to membrane structure, therefore, it is possible to reduce airway stent end to the stimulation of tunica mucosa tracheae, thus prevents granulation tissue hyperplasia.6, the present invention is equipped with bracing wire due to the both ends open place at skeleton, therefore can be taken out from trachea by airway stent easily.7, the present invention adopts the skeleton of excellent arc structure, making skeleton is no longer closed tubular structure, the one side of major arc opening is positioned at the rear (being attached to trachea rear wall after inserting trachea) of support, therefore skeleton of the present invention feeding trachea after, the discharge of airway secretions can be promoted by the motion of indentation, there membrane structure, meet the requirement that desirable airway stent " does not cause ischesis ".8, due to the one side only overlay film of skeleton major arc opening of the present invention, (accounting for support all-round 1/3) is supported without metal structure, therefore the motion of trachea membranous part can not affect support support section structure, thus reduces the probability (this is triple anti-displacement mechanism of this support) of stent migration further.9, the present invention can meet whole seven requirements of desirable airway stent, is a kind of product with practical value and promotional value.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the embodiment of the present invention one;
Fig. 2 is the schematic top plan view of the embodiment of the present invention one;
Fig. 3 is the overall structure schematic diagram of the embodiment of the present invention two;
Fig. 4 is the schematic top plan view of the embodiment of the present invention two.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in detail.
Embodiment one:
As shown in Figure 1 and Figure 2, the present embodiment comprises the membrane structure 2 that a skeleton in tubular construction 1 and overlays on skeleton 1 outside, and the sidewall of tubular structure is the web frame woven by silk material.Skeleton 1 comprises equal diameter main paragraph 11 and is arranged on the bulge 12 at equal diameter main paragraph 11 two ends, wherein, bulge 12 0.5 ~ 1mm larger than the diameter of equal diameter main paragraph 11, the length of bulge 12 self is 5 ~ 6mm, for seamlessly transitting between bulge 12 and equal diameter main paragraph 11.The effect of bulge 12 prevents airway stent of the present invention to be subjected to displacement in trachea to a certain extent.
Further, membrane structure 2 adopts Silicon moulds, and the outer surface of membrane structure is uniformly distributed multiple non-slip process 13, non-slip process 13 is the second anti-displacement structure of airway stent of the present invention, under the double shield arranging bulge 12 and non-slip process 13, airway stent can not be subjected to displacement substantially in air flue.Non-slip process 13 can be set to rectangular protrusions, and can play two-way anti-skidding effect, non-slip process 13 also can adopt other shape, and its shape and density can change when customizing according to patient airway situation.
Further, the two ends of skeleton 1 adopt closing-in structure, and namely the diameter of the opening part at skeleton 1 two ends is less than the diameter of bulge 12, adopt closing-in structure can prevent from stimulating tracheal wall to produce granulation tissue.
Further, membrane structure 2 exceeds the end 1 ~ 1.5mm of skeleton 1, can reduce the stimulation of airway stent end to tunica mucosa tracheae, thus prevent granulation tissue hyperplasia.
Further, the inner side at the both ends open place of skeleton 1 is provided with bracing wire 14, for facilitating the taking-up of airway stent of the present invention.
Further, be also covered with one deck inner membrance at the inwall of skeleton 1, inner membrance is comparatively smooth, to reduce friction, is beneficial to the discharge of secretions.
Further, the silk material that skeleton 1 adopts is niti-shaped memorial alloy, and its chemical composition (wt%) is: Ni54.5 ~ 57.00, Fe≤0.05, C≤0.07; Tensile strength >=the 700MPa of silk material, percentage elongation >=6%.The material that membrane structure 2 adopts is medical grade silicon rubber, and its physical and mechanical properties is as follows: 1. hardness (Shao Er A) 50 ± 5; 2. elongation at break >=500%; 3. hot strength >=8.5Mpa; 4. rupture permanent deformation≤15%.
The airway stent that the present invention take niti-shaped memorial alloy as skeleton 1, silicone rubber is membrane structure 2, its physical property had is as follows: 1. alteration of form rate: support can under external force, by its reduced to less than 50% of original size; 2. shape recovery ratio: support at the temperature of 20 ~ 45 DEG C local radial flatten to original diameter 40% after, remove external force, support can return to more than 95% of original shape; 3. the radial support power of support: the radial support power of support at the temperature of 37 ± 2 DEG C should be not less than 3N; 4. support release performance: support should be able to discharge smoothly from supporting inserter.
The airway stent that the present invention take niti-shaped memorial alloy as skeleton 1, silicone rubber is membrane structure, its chemical property had is as follows: 1. reducing substances: same batch of blank liquid of test liquid and same volume contrasts, and the difference of potassium permanganate solution [(KMnO4)=0.002mol/L] consumption should be less than 6.5mL; 2. heavy metal total content: the color that test liquid presents is no more than the color of the blank liquid of mass concentration ρ (Pb2+)=1 μ g/mL; 3. acid-base value: test liquid compares with batch blank solution, difference≤1.5 of pH value.
The airway stent that the present invention take niti-shaped memorial alloy as skeleton 1, silicone rubber is membrane structure 2, its biocompatibility had is as follows: 1. cytotoxicity: cell-cytotoxic reaction is not more than 1 grade; 2. sensitization: should without sensitivity response; 3. intradermoreaction: answer vacuum response; 4. genetoxic: answer hereditary-less toxicity; 5. subacute toxicity: answer non-toxic reaction.
To sum up, airway stent of the present invention all meets instructions for use in physical property, chemical property and biocompatibility etc., simultaneously, structurally substantially can meet again the requirements (meeting 1. 3. 4. 5. 6. 7. bar requirement) of desirable airway stent, only do not meet the 2. article " not causing ischesis ", and be resolved about the Drug therapy that the retention of airway secretions can dispel airway secretions by application after placing rack.Therefore, the present invention is a kind of product with practical value, promotional value.
Embodiment two:
As shown in Figure 3, Figure 4, the difference of the present embodiment and embodiment one is only, skeleton 1 adopts excellent arc structure, and the central angle of excellent arc structure is about 240 °.Compared with the airway stent in embodiment one, the improvement that the present embodiment does can make airway stent meet the requirement of the 2. article " not causing ischesis " as far as possible.The trachea rear wall of normal person is the flexible structure supported without cartilage, airway stent described in the present embodiment in use, the one side of skeleton 1 major arc opening is just to trachea rear wall, promote that the discharge of airway secretions is (through repeatedly testing by the motion of trachea rear wall place membrane structure 2, when the central angle of excellent arc structure is about 240 °, the moving situation of trachea rear wall place membrane structure 2 is best), the airway stent therefore described in the present embodiment can meet 2. article requirement to a certain extent.Simultaneously, due to the one side only overlay film of skeleton major arc opening of the present invention, support without metal structure, therefore the motion of trachea membranous part can not affect support support section structure, thus reduce the probability of stent migration further, constitute triple anti-displacement mechanism of this support, airway stent can not be subjected to displacement substantially in air flue thus.
Therefore, the present invention is a kind of product that can meet the comprehensive index of desirable airway stent, has practical value and promotional value.
The various embodiments described above are only for illustration of the present invention, and wherein the structure, connected mode etc. of each parts all can change to some extent, and every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (10)
1. an overlay film airway stent, is characterized in that: comprise a skeleton and in tubular construction and overlay on membrane structure on described skeleton outer wall, be respectively arranged with a bulge at the two ends of described skeleton.
2. an overlay film airway stent, is characterized in that: comprise one and to overlay on membrane structure on described skeleton outer wall in the skeleton and of excellent arc structure, be respectively arranged with a bulge at the two ends of described skeleton.
3. a kind of overlay film airway stent as claimed in claim 1 or 2, is characterized in that: described bulge 0.5 ~ 1mm larger than the diameter of the main paragraph of described skeleton, and the length of described bulge is 5 ~ 6mm.
4. a kind of overlay film airway stent as claimed in claim 1 or 2, is characterized in that: arrange multiple non-slip process at the outer surface of described membrane structure.
5. a kind of overlay film airway stent as claimed in claim 1 or 2, is characterized in that: described membrane structure exceeds the end 1 ~ 1.5mm of described skeleton.
6. a kind of overlay film airway stent as claimed in claim 1 or 2, is characterized in that: described tubular structure is woven by niti-shaped memorial alloy silk material and forms.
7. a kind of overlay film airway stent as claimed in claim 1 or 2, is characterized in that: described membrane structure adopts pellosil.
8. a kind of overlay film airway stent as claimed in claim 1 or 2, is characterized in that: the two ends of described skeleton adopt closing-in structure.
9. a kind of overlay film airway stent as claimed in claim 1 or 2, is characterized in that: described skeleton both ends open place is provided with bracing wire.
10. a kind of overlay film airway stent as claimed in claim 2, is characterized in that: the central angle of excellent convex structure is 240 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048332.6A CN105496615A (en) | 2016-01-25 | 2016-01-25 | Covered airway stent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610048332.6A CN105496615A (en) | 2016-01-25 | 2016-01-25 | Covered airway stent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105496615A true CN105496615A (en) | 2016-04-20 |
Family
ID=55705185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610048332.6A Pending CN105496615A (en) | 2016-01-25 | 2016-01-25 | Covered airway stent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105496615A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618817A (en) * | 2016-12-23 | 2017-05-10 | 首都医科大学附属北京儿童医院 | 3D printing endotracheal stent for babies and preparation method and application thereof |
| CN107115165A (en) * | 2017-05-11 | 2017-09-01 | 常州大学 | A kind of technology of preparing of reinforcement silicone airway stent |
| CN107296669A (en) * | 2017-05-18 | 2017-10-27 | 西安交通大学 | A kind of outer suspension holdfast of degradable tracheae and its indirect 3D printing method |
| CN108720971A (en) * | 2018-01-28 | 2018-11-02 | 杭州市第人民医院 | A kind of controllable antibacterial trachea bracket |
| CN108992219A (en) * | 2018-08-25 | 2018-12-14 | 山东瑞安泰医疗技术有限公司 | A kind of overlay film esophageal stents of anti-displacement and preparation method thereof |
| CN115591026A (en) * | 2022-12-13 | 2023-01-13 | 山东百多安医疗器械股份有限公司（Cn） | Hydrogel porous silica gel airway stent and preparation method thereof |
| CN117179958A (en) * | 2023-10-18 | 2023-12-08 | 上海交通大学医学院附属瑞金医院 | Y-shaped tracheal stent and application thereof |
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| CN102715970A (en) * | 2012-05-28 | 2012-10-10 | 张�杰 | Removable multi-purpose medical airway stent |
| CN202960836U (en) * | 2012-11-16 | 2013-06-05 | 余少卿 | External type titanium-alloy trachea bracket |
| CN103505310A (en) * | 2013-10-12 | 2014-01-15 | 南京微创医学科技有限公司 | Integrated support convenient to recycle and weaving method thereof |
| CN203619727U (en) * | 2013-08-05 | 2014-06-04 | 韩新巍 | Tubular anti-skid membrane airway stent |
| CN203710192U (en) * | 2014-02-07 | 2014-07-16 | 王洪武 | Movable sieve pore enveloped metal rack |
| CN105055060A (en) * | 2015-08-04 | 2015-11-18 | 上海交通大学医学院附属上海儿童医学中心 | Tracheal stent and application thereof |
| CN105188790A (en) * | 2013-03-15 | 2015-12-23 | 波士顿科学国际有限公司 | Anti-migratory stent coating |
| CN205729575U (en) * | 2016-01-25 | 2016-11-30 | 首都医科大学附属北京天坛医院 | Overlay film airway stent |
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2016
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102715970A (en) * | 2012-05-28 | 2012-10-10 | 张�杰 | Removable multi-purpose medical airway stent |
| CN202960836U (en) * | 2012-11-16 | 2013-06-05 | 余少卿 | External type titanium-alloy trachea bracket |
| CN105188790A (en) * | 2013-03-15 | 2015-12-23 | 波士顿科学国际有限公司 | Anti-migratory stent coating |
| CN203619727U (en) * | 2013-08-05 | 2014-06-04 | 韩新巍 | Tubular anti-skid membrane airway stent |
| CN103505310A (en) * | 2013-10-12 | 2014-01-15 | 南京微创医学科技有限公司 | Integrated support convenient to recycle and weaving method thereof |
| CN203710192U (en) * | 2014-02-07 | 2014-07-16 | 王洪武 | Movable sieve pore enveloped metal rack |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618817A (en) * | 2016-12-23 | 2017-05-10 | 首都医科大学附属北京儿童医院 | 3D printing endotracheal stent for babies and preparation method and application thereof |
| CN107115165A (en) * | 2017-05-11 | 2017-09-01 | 常州大学 | A kind of technology of preparing of reinforcement silicone airway stent |
| CN107296669A (en) * | 2017-05-18 | 2017-10-27 | 西安交通大学 | A kind of outer suspension holdfast of degradable tracheae and its indirect 3D printing method |
| CN108720971A (en) * | 2018-01-28 | 2018-11-02 | 杭州市第人民医院 | A kind of controllable antibacterial trachea bracket |
| CN108992219A (en) * | 2018-08-25 | 2018-12-14 | 山东瑞安泰医疗技术有限公司 | A kind of overlay film esophageal stents of anti-displacement and preparation method thereof |
| CN115591026A (en) * | 2022-12-13 | 2023-01-13 | 山东百多安医疗器械股份有限公司（Cn） | Hydrogel porous silica gel airway stent and preparation method thereof |
| CN117179958A (en) * | 2023-10-18 | 2023-12-08 | 上海交通大学医学院附属瑞金医院 | Y-shaped tracheal stent and application thereof |
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Application publication date: 20160420 |