CN111840758A - Eustachian tube balloon catheter - Google Patents
Eustachian tube balloon catheter Download PDFInfo
- Publication number
- CN111840758A CN111840758A CN202010636678.4A CN202010636678A CN111840758A CN 111840758 A CN111840758 A CN 111840758A CN 202010636678 A CN202010636678 A CN 202010636678A CN 111840758 A CN111840758 A CN 111840758A
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- Prior art keywords
- tube
- catheter
- balloon
- connector
- cavity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
- A61M2025/0046—Coatings for improving slidability
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
- A61M25/0045—Catheters; Hollow probes characterised by structural features multi-layered, e.g. coated
- A61M2025/0046—Coatings for improving slidability
- A61M2025/0047—Coatings for improving slidability the inner layer having a higher lubricity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/105—Balloon catheters with special features or adapted for special applications having a balloon suitable for drug delivery, e.g. by using holes for delivery, drug coating or membranes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M2025/1043—Balloon catheters with special features or adapted for special applications
- A61M2025/1075—Balloon catheters with special features or adapted for special applications having a balloon composed of several layers, e.g. by coating or embedding
Abstract
The invention relates to a medical instrument, in particular to a eustachian tube saccule catheter which comprises an elongated catheter, wherein the elongated catheter is provided with a near-end catheter body and a far-end catheter body, a connector is fixedly sleeved on the near-end catheter body, a saccule is fixedly sleeved on the far-end catheter body, the outer surface of the saccule is coated with a drug coating, the drug coating is liposome or cyclodextrin, and the peripheral surface of the elongated catheter is provided with a hydrophilic coating. According to the invention, the medicine coating is arranged on the outer surface of the balloon, so that the irritation and toxicity of the medicine to the pathological changes can be reduced, and the stability of the medicine is improved; the hydrophilic coating is arranged on the peripheral surface of the slender catheter, the lubrication degree of the hydrophilic coating is good, the surface friction coefficient of the balloon, the slender catheter and the eustachian tube is reduced, and the balloon catheter can more easily penetrate through a nasal passage of a patient and enter the eustachian tube.
Description
Technical Field
The invention relates to a medical instrument, in particular to a eustachian tube balloon catheter.
Background
The eustachian tube is the only pathway for the middle ear to communicate with the outside world, and a blockage or blockage of the eustachian tube can lead to various pathologies of the middle ear system and ultimately to hearing impairment and noise in the head, and if the blockage is too long, a condition known as secretory otitis media can develop. Eustachian tube dysfunction is mainly caused by factors such as mechanical stenosis caused by swelling of eustachian tube mucous membranes, lack of surfactant in the eustachian tube, and eustachian tube mucous membrane inflammation or allergic edema. Although the auditory sense level can be improved by reconstructing the tympanic cavity and connecting the auditory ossicle chain structure through increasingly perfect middle ear operation modes and advanced operation skills, the eustachian tube dysfunction is not effectively improved at present, so that the long-term effect after the middle ear operation cannot be ensured. At present, the eustachian tube and tympanogram lesions are treated by balloon catheter dilation, but the existing eustachian tube balloon catheter does not have any drug coating added on the surface of the balloon, has certain influence on the stability of the drug, and causes new trauma to patients due to the fact that the inner tube is easy to bend and the balloon is damaged in the operation process because of improper arrangement of the material and the structure of the inner tube.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a eustachian tube balloon catheter, wherein a drug coating is arranged on the outer surface of a balloon, and a hydrophilic coating is arranged on the outer peripheral surface of a slender catheter, wherein the drug coating can reduce the irritation and toxicity of drugs to a pathological change part and improve the stability of the drugs; the hydrophilic coating has better lubrication, so that the surface friction coefficient of the balloon, the slender catheter and the eustachian tube is reduced, and the balloon catheter can more easily pass through the nasal passage of a patient and enter the eustachian tube.
The invention adopts the following technical scheme: the utility model provides a eustachian tube sacculus pipe, includes long and thin pipe, and long and thin pipe has near-end body and distal end body, and fixed cover is equipped with the connector on the near-end body, and fixed cover is equipped with the sacculus on the distal end body, and the surface coating of sacculus has the medicine coating, and the medicine coating is liposome or cyclodextrin.
Further, the drug coating comprises one or more of microspheres, microcapsules, phospholipids, or bilichol bilayers.
According to one technical scheme, the long and thin catheter is internally provided with a single cavity, specifically, a drug feeding cavity or an inflation cavity which is axially communicated is arranged in the long and thin catheter, the tail end of the drug feeding cavity or the inflation cavity is connected with an inner tube, the inner tube penetrates through a balloon, and the outlet end of the inner tube is connected with a polyurethane tube.
In other technical schemes of the invention, the slender catheter is internally provided with two channels, in particular to a medicine feeding cavity and an inflating cavity which are axially communicated and are arranged in the slender catheter, the medicine feeding cavity and the inflating cavity are arranged in a separated mode, the outlet end of the medicine feeding cavity is connected with an inner tube, the inner tube penetrates through the balloon, the outlet end of the inner tube is connected with a polyurethane tube, and the outlet end of the inflating cavity is positioned in the balloon.
Furthermore, the connector is a three-way connector, the three-way connector comprises a first connector end and a second connector end which are horizontally arranged, and a third connector end which is perpendicular to the first connector end and the second connector end, a heat shrink tube is sleeved on the near-end tube body and connected with the near-end tube body through a protective sleeve, the heat shrink tube is in a conical shape and provided with a reducing end and an expanding end, the expanding end is connected with the first connector end, a sealing sleeve is arranged between the second connector end and the first connector end, the third connector end is communicated with the administration cavity, and the second connector end is communicated with the inflation cavity.
Furthermore, a reinforcing mandrel is arranged in the inner pipe, and the outer diameter of the reinforcing mandrel is smaller than the inner diameter of the inner pipe.
Furthermore, the outer peripheral surface of the slender catheter is provided with a hydrophilic coating, and a lubricating coating is arranged in the administration cavity of the slender catheter.
Further, the hydrophilic coating includes a first solution and a second solution, the first solution is composed of an aminosilane, water, and an organic solvent, and the second solution is composed of a hydrophilic polymer and an organic solvent.
Further, the lubricating coating is a silicone oil lubricating coating.
Compared with the prior art, the invention has the beneficial effects that:
(1) the eustachian tube balloon catheter is characterized in that the outer surface of the balloon is provided with a drug coating, and the outer surface of the slender catheter is provided with a hydrophilic coating, wherein the drug coating can reduce the irritation and toxicity of drugs to pathological changes and improve the stability of the drugs; the hydrophilic coating has better lubrication, so that the surface friction coefficient of the balloon, the slender catheter and the eustachian tube is reduced, and the balloon catheter can more easily pass through the nasal passage of a patient and enter the eustachian tube.
(2) The polyurethane tube is connected with the outlet end of the inner tube of the eustachian tube saccule catheter, is positioned outside the saccule, has lower hardness, can reduce discomfort and pain of a patient in the operation process, and can avoid new trauma to the wound of the patient.
(3) The eustachian tube balloon catheter is provided with the medicine feeding cavity and the air charging cavity in the slender catheter at intervals in the axial direction, the outlet end of the air charging cavity is positioned inside the balloon and used for charging the balloon, the outlet end of the medicine feeding cavity is connected with the inner tube, the outlet end of the inner tube is positioned outside the balloon and used for injecting medicine into a tympanic cavity, the aim of opening the eustachian tube exactly can be achieved through the arrangement of the double-inner-cavity tube, meanwhile, the medicine can be injected into the tympanic cavity, and therefore the purpose of treating the eustachian tube obstructive disease caused by eustachian tube stenosis is achieved.
(4) The eustachian tube balloon catheter is provided with the reinforcing mandrel in the inner tube, so that the safety of the product during operation and control can be effectively improved, and the injury of a patient caused by the balloon damage caused by operation and control obstruction in clinical practice is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the general construction of a eustachian tube balloon catheter of the invention;
FIG. 2 is a view of the elongated catheter structure of the eustachian tube balloon catheter of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a cross-sectional view of an elongated catheter of the eustachian tube balloon catheter of the present invention;
FIG. 5 is a longitudinal cross-sectional view of the distal tube body of the eustachian tube balloon catheter of the present invention;
the medical device comprises a catheter 1, an elongated catheter 11, a proximal end tube body 12, a distal end tube body 13, a drug delivery cavity 131, a drug inlet 132, a drug delivery cavity port 14, an inflation cavity 2, a connector 21, a first interface end 22, a second interface end 23, a third interface end 3, a reinforcing mandrel 4, a balloon 5, an inner tube 6, a tapered heat shrink tube 61, a diameter reducing end 62, a polyurethane tube 7 and a handle 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-5, the invention provides a eustachian tube balloon catheter, which comprises an elongated catheter 1, wherein the elongated catheter 1 is provided with a proximal tube body 11 and a distal tube body 12, a connector 2 is fixedly sleeved on the proximal tube body 11, and the connector 2 is communicated with the elongated catheter 1 and is used for infusing liquid medicine into the eustachian tube; the far-end tube body 12 is fixedly sleeved with the sacculus 4, the outer surface of the sacculus 4 is coated with a medicine coating, the wound of a patient is treated through the medicine coating, and the medicine coating is liposome or cyclodextrin.
Specifically, the drug coating of this embodiment includes one or more of microspheres, microcapsules, phospholipids, or bilichol bilayers. By adding liposome or cyclodextrin such as microsphere, microcapsule or phospholipid and bilichol bilayer, irritation and toxicity of the medicine to pathological changes can be reduced, and stability of the medicine can be improved. It can be understood that cyclamine is cyclic oligosaccharide containing 6-8 glucose units, and can form inclusion compound with fat-soluble medicine to increase their water-solubility and raise solubility of medicine, and cyclodextrin can directly act on epithelial cell so as to raise permeability of water-soluble medicine such as peptide and protein to mucosa; the liposome is a closed vesicle which is composed of lipid bilayers and has an aqueous phase inside, mainly composed of phospholipid and cholesterol, and the liposome can also reduce the toxicity of the medicine and improve the stability of the medicine. The cyclodextrin and the liposome described in the invention are absorption enhancers, which can increase the absorption of the nasal mucosa of the drug and improve the drug property.
Specifically, in one embodiment of the present invention, the elongated catheter 1 is a single lumen catheter, specifically, an axially through drug feeding lumen or inflation lumen is provided in the elongated catheter 1, the end of the drug feeding lumen or inflation lumen is connected with an inner tube, the inner tube penetrates through the balloon, and the outlet end of the inner tube is connected with a polyurethane tube 7; as can be known, the polyurethane tube has lower hardness, no pollution, no toxicity and no odor, can reduce the discomfort and pain of patients in the operation process, can avoid new wounds to the wounds of the patients and has better safety. The invention can respectively realize the purposes of expanding the eustachian tube and injecting medicine into the tympanic cavity by arranging the single cavity channel on the slender catheter 1, the balloon catheter arranged in the single cavity channel is a common product in the existing hospital, and the technical field can design according to the existing product and belongs to the protection scope of the invention.
Specifically, as shown in fig. 2 to 5, in a preferred embodiment of the present invention, the elongated catheter 1 is provided with two lumens, specifically, the elongated catheter 1 is provided with a drug administration lumen 13 and an inflation lumen 14 which are axially through, the drug administration lumen 13 and the inflation lumen 14 are adjacent to each other and are spaced apart from each other, the outlet end of the drug administration lumen 13 is connected with the inner tube 5, the inner tube 5 penetrates through the balloon 4, and the outlet end of the inner tube 5 is connected with the polyurethane tube 7, which has low hardness, is pollution-free, non-toxic and tasteless, can reduce discomfort and pain of a patient during an operation process, can avoid causing new trauma to a wound of the patient, and has good safety; the outlet end of inflation lumen 14 is located inside balloon 4. It should be noted that, the elongated catheter 1 of this embodiment is provided with the administration cavity 13 and the inflation cavity 14 at an axial interval, and an outlet end of the inflation cavity 14 is located inside the balloon 4 and is used for inflating the balloon 4, specifically, in use, the air pressure inside the balloon 4 needs to be ensured to be less than 16 atmospheres, otherwise, the balloon 4 may explode and cause injury to the patient; the outlet end of the medicine feeding cavity 13 is connected with an inner tube 5, and the outlet end of the inner tube 5 is positioned outside the balloon 4 and used for injecting medicine into the eustachian tube. The invention can achieve the purpose of opening the eustachian tube exactly by arranging the double cavities of the slender catheter 1, and can inject medicine into the eustachian tube, thereby achieving the purpose of treating the eustachian tube obstructive disease caused by eustachian tube stenosis.
Specifically, as shown in fig. 1, the connector 2 in the above preferred embodiment is a three-way joint, the three-way joint includes a first interface end 21 and a second interface end 22 which are horizontally arranged, and a third interface end 23 which is vertically arranged with respect to the first interface end 21 and the second interface end 22, the proximal tube 11 is sleeved with a tapered heat-shrinkable tube 6, the tapered heat-shrinkable tube 6 is connected with the proximal tube 11 through a protective sleeve (not shown), the tapered heat-shrinkable tube 6 has a reduced diameter end 61 and an expanded diameter end 62, the expanded diameter end 62 is connected with the first interface end 21, a sealing sleeve is arranged between the second interface end 22 and the first interface end 21, the third interface end is communicated with the administration cavity 13, and the second interface end 22 is communicated with the inflation cavity. The concrete arrangement of the connector 2 of the embodiment realizes the stable sealing connection of the elongated catheter 1 and the connector 2, and the structure is reasonable. Of course, the connector of the present invention may be a separate connector, for example, in other embodiments, the connector 2 includes a first connector and a second connector, the first connector is a three-way connector, the second connector is a straight two-way connector, the first connector is communicated with the administration cavity 13, the second connector is communicated with the inflation cavity 14, and the first connector and the second connector are connected in a sealing manner. The first connector and the second connector can simultaneously realize expansion of a narrow or blocked eustachian tube and infusion of liquid medicine, the whole structure is simple, the use is convenient, and the first connector and the second connector can be different types of connectors optionally, so that the invention belongs to the protection scope.
Specifically, as shown in fig. 3, in the above preferred embodiment, the outer peripheral surface of the proximal tube 11 is provided with a drug inlet 131, the drug inlet 131 is communicated with the administration cavity 13, and the drug inlet 131 is communicated with the third mouthpiece end 23. In order to realize that the medicine inlet part and the air inlet part do not interfere with each other, the medicine feeding cavity port 132 at the end part of the near-end tube body 11 is sealed by a sealing plug, the air inlet cavity port at the end part of the near-end tube body 11 is communicated with the second connector end 22, and the third connector end 23 and the second connector end 22 are not communicated with each other, so that the purpose that the independent work of each cavity channel does not interfere with each other is realized.
Specifically, as shown in fig. 5, the inner tube 5 in the above preferred embodiment is further provided with a reinforcing mandrel 3, and the outer diameter of the reinforcing mandrel 3 is smaller than the inner diameter of the inner tube 5. The safety when the product is controlled can be effectively improved by adding the reinforcing mandrel 3 in the inner tube 5, and the injury to a patient caused by the damage (easy bending) of the balloon caused by the control obstruction in clinical practice is reduced.
Specifically, still be equipped with handle 8 on the outer peripheral face of this embodiment connector 2, make things convenient for medical personnel to hand the device and operate.
Specifically, in all embodiments of the present invention, the outer circumferential surface of the elongated catheter 1 is provided with a hydrophilic coating, and the inner lumen of the elongated catheter 1 (i.e., the administration lumen 13) is provided with a lubricious coating. Wherein, the hydrophilic coating comprises a first solution and a second solution, and the components of the first solution are as follows: 1-2% of amino silanes, 8-10% of water, organic solvent and the balance; the composition of the second solution was: 2-3% of hydrophilic polymer, organic solvent and the balance, the outer surface of the slender catheter 1 is treated by the lubricating liquid reagent of the hydrophilic coating, the treated slender catheter 1 has better lubrication degree, the surface friction coefficient can be reduced by 80%, and the balloon catheter can more easily pass through the nasal passage of a patient and enter the eustachian tube. It is noted that all components in the reagent prepared by the invention have no adverse reaction to human bodies, and the reagent has good safety and long storage time.
Specifically, the lubricious coating in the administration lumen 13 of the elongate catheter 1 of this embodiment is a silicone oil lubricious coating. The silicone oil lubricating coating can prevent the liquid medicine from remaining and increase the conveying speed of the liquid medicine.
When the preferred embodiment is used, the eustachian tube balloon catheter is put into the large nasopharynx part through the nasal cavity, then is put into the bone part or the cartilaginous part of the eustachian tube through the eustachian tube pharyngeal opening of the nasopharynx part, then is connected with the port of the external filling device through the second mouthpiece end 22, is used for expanding the eustachian tube after being inflated by injecting gas into the balloon 4 through the filling device, enables the blocked eustachian tube to be opened, is connected with the port of the external infusion device through the third mouthpiece end 23, injects medicine into the administration cavity 13 through the infusion device, reaches the inside of the tympanic cavity through the polyurethane tube 7, and infuses liquid medicine into the position with pathological changes in the eustachian tube, so that related diseases caused by the breakdown of the eustachian tube are treated.
The eustachian tube balloon catheter has the advantages of simple structure, convenience in use and lower cost, and can realize dilation of a narrow or blocked eustachian tube and infusion of liquid medicine, so that diseases caused by eustachian tube disorders can be more effectively treated.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.
Claims (9)
1. The eustachian tube balloon catheter is characterized by comprising an elongated catheter, wherein the elongated catheter is provided with a near-end catheter body and a far-end catheter body, a connector is fixedly sleeved on the near-end catheter body, a balloon is fixedly sleeved on the far-end catheter body, a medicine coating is coated on the outer surface of the balloon, and the medicine coating is liposome or cyclodextrin.
2. The eustachian tube balloon catheter of claim 1, wherein the drug coating comprises one or more of microspheres, microcapsules, phospholipids, or bilichol bilayers.
3. The eustachian tube balloon catheter according to claim 1, wherein an axially through administration cavity or inflation cavity is arranged in the elongated catheter, the end of the administration cavity or inflation cavity is connected with an inner tube, the inner tube penetrates through the balloon, and the outlet end of the inner tube is connected with a polyurethane tube.
4. The eustachian tube balloon catheter according to claim 1, wherein a drug feeding cavity and an inflation cavity which are axially communicated are arranged in the elongated catheter, the drug feeding cavity and the inflation cavity are arranged in a separated mode, an inner tube is connected to an outlet end of the drug feeding cavity, the inner tube penetrates through the balloon, a polyurethane tube is connected to an outlet end of the inner tube, and an outlet end of the inflation cavity is located inside the balloon.
5. The eustachian tube balloon catheter according to claim 4, wherein the connector is a three-way connector, the three-way connector comprises a first connector end and a second connector end which are horizontally arranged, and a third connector end which is vertically arranged with the first connector end and the second connector end, a heat shrink tube is sleeved on the proximal tube body and connected with the proximal tube body through a protective sleeve, the heat shrink tube is in a conical shape and provided with a reducing end and an expanding end, the expanding end is connected with the first connector end, a sealing sleeve is arranged between the second connector end and the first connector end, the third connector end is communicated with the administration cavity, and the second connector end is communicated with the inflation cavity.
6. The eustachian tube balloon catheter according to claim 3 or 4, wherein a reinforcing mandrel is further provided in the inner tube, the reinforcing mandrel having an outer diameter smaller than the inner diameter of the inner tube.
7. The eustachian tube balloon catheter according to claim 1, wherein the outer peripheral surface of the elongated catheter is provided with a hydrophilic coating and the administration lumen of the elongated catheter is provided with a lubricious coating.
8. The eustachian tube balloon catheter according to claim 7, wherein the hydrophilic coating comprises a first solution consisting of an aminosilane-based compound, water and an organic solvent, and a second solution consisting of a hydrophilic polymer and an organic solvent.
9. The eustachian tube balloon catheter according to claim 7, wherein the lubricious coating is a silicone oil lubricious coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010636678.4A CN111840758A (en) | 2020-07-03 | 2020-07-03 | Eustachian tube balloon catheter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010636678.4A CN111840758A (en) | 2020-07-03 | 2020-07-03 | Eustachian tube balloon catheter |
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| CN111840758A true CN111840758A (en) | 2020-10-30 |
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| CN202010636678.4A Pending CN111840758A (en) | 2020-07-03 | 2020-07-03 | Eustachian tube balloon catheter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112618928A (en) * | 2020-12-31 | 2021-04-09 | 曼陀罗(乳源)医药制造有限公司 | Human body cavity expansion and camera system based on balloon pressure pump assembly |
| CN112957593A (en) * | 2021-01-18 | 2021-06-15 | 宁波汉科医疗器械有限公司 | Eustachian tube balloon catheter imbedding device |
| CN114870225A (en) * | 2022-05-30 | 2022-08-09 | 上海交通大学医学院附属第九人民医院 | Transnasopharyngeal tympanic tube temporary loading administration device |
| WO2022217398A1 (en) * | 2021-04-12 | 2022-10-20 | Orbusneich Medical (Shenzhen) Co., Ltd | Expandable balloon catheter |
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Application publication date: 20201030 |