Adjustable device for eustachian tube indwelling in operation

Abstract

The invention relates to an adjustable device for eustachian tube indwelling in an operation. The adjustable device comprises a tube indwelling device body, a eustachian tube pharynx end of the tube indwelling device and a eustachian tube tympanic chamber opening end of the tube indwelling device. The two ends of the catheter device body are connected with the pharyngeal opening end of the Eustachian tube of the catheter device and the tympanic chamber opening end of the Eustachian tube of the catheter device respectively. The pharynx end of the Eustachian tube of the indwelling catheter device is composed of four pharynx end limiting flaps, and the tympanic chamber opening end of the Eustachian tube of the indwelling catheter device is composed of four tympanic chamber opening end limiting flaps. The Eustachian tube indwelling device has the advantages that the tube diameter can be adjusted through the tube indwelling device body, unnecessary waste is reduced, and meanwhile the effect of expanding the Eustachian tube is achieved through tube indwelling for a period of time; the pharyngeal opening end of the eustachian tube of the indwelling catheter device is not prone to injuring mucous membranes, the pharyngeal opening end of the eustachian tube of the indwelling catheter device and the tympanic cavity opening end of the eustachian tube of the indwelling catheter device play a limiting role, ventilation and drainage are easy, and liquid pumping and medicine injection of the tympanic cavity are convenient. And after catheterization, the connecting part is dissolved and is opened in a petal shape, so that the purposes of fixing and drainage are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of Eustachian tube placement, which uses a Eustachian tube support system to enhance the drainage and ventilation functions of the Eustachian tube during surgery, and more specifically, to an adjustable device for Eustachian tube placement during surgery. Background Art

[0002] The Eustachian tube is an important structure for maintaining the healthy physiological state of the middle ear cavity. Its function of balancing the air pressure in the middle ear mainly depends on the patency of the Eustachian tube cavity, the motor function of the muscles around the tube and the "pumping effect" of the cartilage.

[0003] Eustachian tube disease is a disease that has a great impact on the patient's daily living ability and hearing. For example, during surgery for patients with severe otitis media, when cleaning the tympanic opening and promontory mucosa, it is easy to cause postoperative epithelialization or scar formation, and the original ciliated columnar epithelium and the collective drainage function of the tympanic opening disappear, affecting the tympanic drainage dysfunction. If not treated in time, it may cause complications such as adhesive otitis media, tympanosclerosis, cholesterol granuloma, etc., threatening the patient's life and health. Therefore, during surgery, a Eustachian tube catheter can be implanted at the same time to facilitate the drainage and ventilation function of the Eustachian tube after surgery.

[0004] Most invention patents on the market currently use nasopharyngeal implantation of Eustachian tube catheterization devices. There is a lack of catheterization devices for Eustachian tube dysfunction found during surgery. The most commonly used one is the epidural catheter, which has a thinner diameter and a softer texture. The diameter is 1mm, which is small and has insufficient support. The inserted epidural catheter has no fixing device at the tympanic opening of the Eustachian tube, which is prone to tube dislocation. It often needs to be removed after surgery, which can easily cause secondary pain to the patient. And it cannot solve the problems of mucosal swelling and Eustachian tube stenosis.

[0005] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0006] The object of the present invention is to provide an adjustable device for Eustachian tube catheterization, which is used to implant a Eustachian tube stent system into the pharyngeal opening from the tympanic opening of the Eustachian tube during surgery to enhance the drainage and ventilation functions of the Eustachian tube. The adjustable device for Eustachian tube catheterization during surgery is environmentally friendly, soluble, drug-administered, adjustable, simple in technology and low in cost.

[0007] The present invention provides an adjustable device for Eustachian tube catheterization during surgery, comprising a catheterization device body, a Eustachian tube pharyngeal opening end of the catheterization device and a Eustachian tube tympanic opening end of the catheterization device; the catheterization device body is in the shape of a spiral tube, and the Eustachian tube pharyngeal opening end of the catheterization device and the Eustachian tube tympanic opening end of the catheterization device are respectively connected to the two ends of the catheterization device body; the Eustachian tube pharyngeal opening end of the catheterization device is composed of four pharyngeal opening end limiting flaps, and the four pharyngeal opening end limiting flaps are connected to each other to form a semi-ellipsoid shape with a smooth surface and a hollow interior; the Eustachian tube tympanic opening end of the catheterization device is composed of four tympanic opening end limiting flaps, and the four tympanic opening end limiting flaps are connected to each other to form a semi-ellipsoid shape with a smooth surface and a hollow interior.

[0008] By adopting the above technical scheme, the main body of the catheter placement device in the shape of a spiral tube is unfolded according to the diameters of different parts of the Eustachian tube. The diameters of the Eustachian tubes of different age groups are also different. The main body of the catheter placement device of the present invention can adjust the diameter of the tube to reduce unnecessary waste; at the same time, the four pharyngeal opening limit flaps are dissolved at the connection after the catheter is placed, which not only plays a limiting role, but also facilitates ventilation and drainage, and can also facilitate the tympanic cavity to draw liquid and inject drugs; the pharyngeal opening of the Eustachian tube of the catheter placement device is smooth and tough, and during the operation, the tympanic cavity opening of the Eustachian tube is easy to insert with gentle force, and it is not easy to damage the mucosa. At the same time, after a period of catheter placement, it also plays a role in expanding the Eustachian tube; in addition, the connection of the four tympanic cavity opening limit flaps is dissolved at the connection after the catheter is placed, and the tympanic cavity opening of the Eustachian tube of the catheter placement device opens in a petal shape, which plays a role in fixation and drainage.

[0009] Furthermore, the four pharyngeal end limiting flaps and the four tympanic end limiting flaps are connected by gelatin.

[0010] Furthermore, the diameter of the helical tube-shaped tube placement device body can be adjusted within a range of 1 mm to 2 mm.

[0011] Furthermore, the material of the tube placement device body is polylactic acid.

[0012] Furthermore, a lactide-glycolide copolymer is arranged in the tube of the catheter placement device body, and a drug coating is provided on the inner wall of the pharyngeal end of the Eustachian tube of the catheter placement device and the tympanic cavity end of the Eustachian tube of the catheter placement device, and the drug coating is a drug stent composed of mometasone furoate, lactide-glycolide copolymer and polyethylene glycol.

[0013] Furthermore, the length of the adjustable device for Eustachian tube placement during surgery is 30 mm-40 mm.

[0014] Furthermore, a first mark mark, a second mark mark and a third mark mark are respectively arranged on the body of the tube placement device, the first mark mark is 10-13 mm away from the tail end of the pharyngeal opening of the Eustachian tube of the tube placement device, the second mark mark is 18-20 mm away from the tail end of the pharyngeal opening of the Eustachian tube of the tube placement device, and the third mark mark is 35-40 mm away from the tail end of the pharyngeal opening of the Eustachian tube of the tube placement device.

[0015] The adjustable device provided by the present invention is used for patients with Eustachian tube stenosis found during middle ear surgery, and can be implanted with Eustachian tube catheter from the tympanic opening of the Eustachian tube at the same time, combining environmental protection and drug administration into one, the Eustachian tube pharyngeal opening end of the catheter placement device is smooth and tough, and can be easily inserted from the tympanic opening of the Eustachian tube with gentle force, without easily damaging the mucosa, and at the same time, after a period of catheter placement, it can also play a role in expanding the Eustachian tube, supplementing the Eustachian tube catheter placement device that is lacking in the market for Eustachian tube stenosis found during middle ear surgery, the operation steps are simpler, easy for beginners to use, saving operation time, and implantation of Eustachian tube through the natural tube is non-invasive treatment; the catheter placement device body is made of environmentally friendly and degradable food-grade materials, and does not need to be removed after the operation, but dissolves by itself, reducing the discomfort and economic burden of patients who have to undergo a second removal. The diameter of the catheter device body can be adjusted individually and at different parts of the Eustachian tube to reduce production costs; the adhesion material of the Eustachian tube pharyngeal end and the Eustachian tube tympanic cavity end of the catheter device is gelatin, which can open in a petal shape after dissolving in water after insertion, thereby achieving fixation and drainage purposes; the intraluminal stent drug can be slowly released to reduce mucosal edema and scar hyperplasia caused by inflammatory reactions, and reduce the probability of recurrence of stenosis; the surface of the catheter body is marked with an implantation depth mark, which is beneficial for the surgeon to clearly control the implantation position and depth, thereby reducing operation time and unnecessary complications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an adjustable device for Eustachian tube placement during surgery provided by an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Another perspective structural diagram of the adjustable device used for Eustachian tube placement during surgery.

[0018] Figure 3 for Figure 1 Schematic plan view of an adjustable device for intraoperative Eustachian tube cannulation.

[0019] Figure 4 for Figure 1 A schematic diagram of the structure of the catheter placement device body of the adjustable device used for Eustachian tube catheterization during surgery.

[0020] The reference numerals and components involved in the drawings are as follows:

[0021] 100. Catheterization device body

[0022] 110. First Sign

[0023] 120. Second mark and

[0024] 130. The third sign

[0025] 200. Tube placement device, pharyngeal end of Eustachian tube

[0026] 210. Pharyngeal stop flap

[0027] 300. Tube placement device Eustachian tube tympanic cavity end

[0028] 310, Tympanic cavity end limit flap

[0029] 400. Drug-eluting stent DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence.

[0032] Example 1

[0033] Figure 1 A schematic diagram of the structure of an adjustable device for Eustachian tube placement during surgery provided by an embodiment of the present invention, Figure 2 for Figure 1 Another perspective structural diagram of the adjustable device for Eustachian tube cannulation during surgery, Figure 3 for Figure 1 A schematic plan view of an adjustable device for intraoperative Eustachian tube cannulation, Figure 4 for Figure 1 Schematic diagram of the structure of the catheter placement device body of the adjustable device used for Eustachian tube catheterization during surgery. Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4The adjustable device for Eustachian tube catheterization during surgery provided by an embodiment of the present invention comprises a catheterization device body 100, a Eustachian tube pharyngeal end 200 of the catheterization device and a Eustachian tube tympanic end 300 of the catheterization device; the catheterization device body 100 is in the shape of a spiral tube, and the Eustachian tube pharyngeal end 200 of the catheterization device and the Eustachian tube tympanic end 300 of the catheterization device are respectively connected to the two ends of the catheterization device body 100; the Eustachian tube pharyngeal end 200 of the catheterization device is composed of four pharyngeal end limiting flaps 210, and the four pharyngeal end limiting flaps 210 are interconnected to form a semi-ellipsoid shape with a smooth surface and a hollow interior; the Eustachian tube tympanic end 300 of the catheterization device is composed of four tympanic end limiting flaps 310, and the four tympanic end limiting flaps 310 are interconnected to form a semi-ellipsoid shape with a smooth surface and a hollow interior.

[0034] It should be noted that the present invention is used for patients with Eustachian tube stenosis found during middle ear surgery. The device of the present invention can be implanted from the tympanic opening of the Eustachian tube at the same time, combining environmental protection and drug administration. The pharyngeal opening end 200 of the Eustachian tube placement device is smooth and tough, and it is easy to be placed from the tympanic opening of the Eustachian tube with gentle force, and it is not easy to damage the mucosa. At the same time, after a period of placement, it also plays a role in expanding the Eustachian tube, which supplements the lack of Eustachian tube placement devices found in middle ear surgery on the market. The operation steps are simpler, easy for beginners to use, saving operation time, and placement through the natural tube Eustachian tube belongs to non-invasive treatment;

[0035] The tympanic cavity opening end 300 of the Eustachian tube of the catheter placement device of the present invention not only plays a limiting role, but also facilitates ventilation and drainage, and can also facilitate tympanic cavity extraction of liquid and injection of drugs; the Eustachian tube pharyngeal opening end 200 of the catheter placement device is composed of four pharyngeal opening end limiting flaps 210, and the Eustachian tube tympanic cavity opening end 300 of the catheter placement device is composed of four tympanic cavity opening end limiting flaps 310; the connection between the four pharyngeal opening end limiting flaps 210 and the four tympanic cavity opening end limiting flaps 310 is dissolved after the catheter is placed, and the Eustachian tube pharyngeal opening end 200 of the catheter placement device opens in a petal shape, which plays a role in fixation and drainage. At the same time, when the Eustachian tube pharyngeal opening end 200 of the catheter placement device is opened, the spiral tube-shaped catheter placement device body 100 is unfolded according to the different diameters of the Eustachian tube. The diameters of the Eustachian tubes of different age groups are also different. The catheter placement device body 100 of the present invention can adjust the diameter of the tube to reduce unnecessary waste.

[0036] The adjustable device for Eustachian tube catheterization during surgery provided by the present invention combines environmental protection and drug administration. The Eustachian tube pharyngeal opening end 200 of the catheterization device is smooth and tough, and is easy to insert from the tympanic cavity opening with gentle force, and is not easy to damage the mucosa. At the same time, after a period of catheterization, it also plays a role in expanding the Eustachian tube, which supplements the Eustachian tube catheterization device that is lacking in the market for Eustachian tube dysfunction found in middle ear surgery. The operation steps are simpler, easy for beginners to use, and saves surgical time. Insertion through the tympanic cavity opening of the natural tube Eustachian tube is a non-invasive treatment; the catheterization device body 100 uses environmentally friendly and degradable food-grade materials, and does not need to be removed after the operation, and dissolves by itself, reducing the patient's discomfort and economic burden of secondary removal. When the pharyngeal opening 200 of the Eustachian tube and the tympanic opening 300 of the Eustachian tube of the catheter placement device are opened, the diameter of the catheter placement device body 100 can be adjusted individually and adjusted at different positions of the Eustachian tube, thereby reducing the production cost; the adhesion material of the pharyngeal opening 200 of the Eustachian tube and the tympanic opening 300 of the Eustachian tube of the catheter placement device is gelatin, which can be opened in a petal shape after being dissolved in water after insertion, thereby achieving the purpose of fixation and drainage; the intraluminal stent drug can be slowly released, thereby reducing the mucosal edema and scar hyperplasia caused by the inflammatory response, and reducing the probability of recurrence of stenosis; the surface of the catheter body is marked with an implantation depth mark, which is beneficial for the surgeon to clearly control the implantation position and depth, thereby reducing the operation time and unnecessary complications.

[0037] Furthermore, the four pharyngeal end limiting flaps 210 and the four tympanic end limiting flaps 310 are connected by gelatin.

[0038] It should be noted that gelatin is a protein colloid extracted from animal bones, skin, cartilage, etc. Gelatin is widely used in the food industry and can be used to make jelly candies, frozen drinks, meat products, etc., as a gelling agent and stabilizer; in addition, it is also widely used in the fields of pharmaceutical preparations, beauty and skin care products, etc.; and gelatin is a sol and gel thermoreversible substance. When the temperature is higher than its melting point, gelatin is in a fluid state; when the temperature is lower than the melting point, gelatin solidifies into a colloid. In order to maintain the stability of the catheter, the pharyngeal end limiting flap 210 and the tympanic end limiting flap 310 of the present invention are adhered by gelatin, and the pharyngeal end 200 of the catheter placement device enters the pharyngeal opening of the Eustachian tube. After the tympanic end 300 of the catheter placement device is at the tympanic opening, the gelatin dissolves and can be opened in the tympanic opening in the shape of petals, thereby fixing the device to prevent it from falling off.

[0039] Furthermore, the diameter of the helical tube-shaped tube placement device body 100 can be adjusted within a range of 1 mm to 2 mm.

[0040] It should be noted that the longitudinal diameter of the isthmus of the Eustachian tube is: 1.77±0.27mm on the left and 1.77±0.29mm on the right; the transverse diameter is 1.62±0.24mm on the left and 1.62±0.26mm on the right. Therefore, the diameter of the Eustachian tube can be adjusted between 1-2mm.

[0041] Furthermore, the material of the catheter placement device body 100 of the present invention is polylactic acid; the catheter placement device body 100 does not need to be removed after surgery and dissolves on its own, thereby reducing the patient's discomfort and economic burden of secondary removal.

[0042] It should be noted that polylactic acid, commonly known as PLA, is a thermoplastic made from renewable resources such as corn starch, cassava roots or sugarcane. It is a new type of biodegradable material, mainly composed of lactic acid polymerization, and has the characteristics of environmental protection, renewable and biodegradable.

[0043] Environmentally friendly features: PLA materials are derived from renewable plant resources such as corn starch, which is fermented into lactic acid and then polymerized into PLA. This process reduces dependence on fossil fuels, reduces greenhouse gas emissions, and is highly environmentally friendly.

[0044] Biodegradability: PLA materials can be decomposed into carbon dioxide and water by microorganisms under specific environments, such as industrial composting conditions or in soil, thus returning to the natural cycle without causing persistent pollution.

[0045] Widely used: Packaging materials: food packaging, beverage bottles, cling film, etc.; 3D printing materials: Due to its good formability and printability, PLA is one of the most commonly used materials for 3D printing, which promotes personalized manufacturing and innovative design; Medical field: With its biocompatibility and degradability, polylactic acid shows great potential in medical implants, tissue engineering, drug release systems, etc. Because it is a soluble material, it does not need to be removed after surgery, reducing the pain and economic burden of patients after surgery.

[0046] Furthermore, a lactide-glycolide copolymer is arranged in the tube of the catheter placement device body 100 of the present invention, and a drug coating is provided on the inner wall of the Eustachian tube pharyngeal end 200 of the catheter placement device and the Eustachian tube tympanic cavity end 300 of the catheter placement device, and the drug coating is a drug stent 400 composed of the drug mometasone furoate, lactide-glycolide copolymer and polyethylene glycol.

[0047] It should be noted that the drug coating is attached to the inner wall of the pharyngeal end 200 of the catheter device and the tympanic cavity end 300 of the catheter device in a mesh shape. When implanted in the tympanic cavity, the pharyngeal end 200 of the catheter device and the tympanic cavity end 300 of the catheter device are spread out like petals. After the catheter device body 100 is curled and unfolded, the drug coating is in a cross shape in the tube of the catheter device body 100, and the drug is slowly released (such as Figure 4 shown).

[0048] Furthermore, the length of the adjustable device for Eustachian tube placement during surgery of the present invention is 30 mm-40 mm.

[0049] Further references Figure 3 In the present invention, a first mark mark 110, a second mark mark 120 and a third mark mark 130 are respectively arranged on the catheter placement device body 100, the first mark mark 110 is 10-13mm away from the tail end of the Eustachian tube pharyngeal end 200 of the catheter placement device, the second mark mark is 18-20mm away from the tail end of the Eustachian tube pharyngeal end 200 of the catheter placement device, and the third mark mark 130 is 35-40mm away from the tail end of the Eustachian tube pharyngeal end 200 of the catheter placement device.

[0050] It should be noted that the distance from the center of the Eustachian tube pharyngeal opening to the end of the isthmus pharyngeal opening is: 17.89±1.28mm on the left and 17.91±1.11mm on the right; the length of the Eustachian tube isthmus is: 6.85±0.77mm on the left and 6.84±0.75mm on the right; the distance from the center of the Eustachian tube tympanic opening to the end of the isthmus tympanic opening is: 11.77±1.02mm on the left and 11.69±0.95mm on the right.

[0051] Therefore, a first mark mark 110 is set 10-13 mm away from the end of the Eustachian tube pharyngeal opening 200 of the catheter placement device, indicating that the Eustachian tube catheter has reached the tympanic cavity opening of the isthmus; a second mark mark is set 18-20 mm away from the end of the Eustachian tube pharyngeal opening 200 of the catheter placement device, indicating that the Eustachian tube catheter has passed the pharyngeal opening of the isthmus; a third mark mark 130 is set 35-40 mm away from the end of the Eustachian tube pharyngeal opening 200 of the catheter placement device, indicating that the Eustachian tube catheter has reached the pharyngeal Eustachian tube opening.

[0052] Based on the above description, it can be seen that the advantages of the present invention are:

[0053] 1. The adjustable device for Eustachian tube catheterization during surgery provided by the present invention combines environmental protection and drug administration. The end of the Eustachian tube pharyngeal opening of the catheterization device is smooth and tough. It is easy to insert the catheter from the tympanic opening of the Eustachian tube during surgery with gentle force, and it is not easy to damage the mucosa. At the same time, after a period of catheterization, it also plays a role in expanding the Eustachian tube, which supplements the lack of Eustachian tube catheterization devices on the market for the functional disorders caused by Eustachian tube stenosis found in middle ear surgery. The operation steps are simpler, easy for beginners to use, and saves surgical time. Insertion through the natural tube Eustachian tube tympanic opening belongs to non-invasive treatment;

[0054] 2. The adjustable device for Eustachian tube placement during surgery provided by the present invention uses environmentally friendly and degradable food-grade materials for the tube placement device body. It does not need to be removed after surgery and dissolves on its own, reducing the discomfort and economic burden of patients who need to remove it twice;

[0055] 3. The adjustable device for Eustachian tube placement during surgery provided by the present invention can adjust the diameter of the tube placement device body individually and can be adjusted at different parts of the Eustachian tube, thereby reducing production costs;

[0056] 4. The adjustable device for Eustachian tube placement during surgery provided by the present invention has a pharyngeal end limiting flap 210 and a tympanic end limiting flap 310 made of gelatin, which can be opened in a petal shape after being dissolved in water after placement, thereby achieving the purpose of fixation and drainage;

[0057] 5. The adjustable device for Eustachian tube placement during surgery provided by the present invention can slowly release drugs from the stent in the lumen, thereby reducing mucosal edema and scar hyperplasia caused by inflammatory reactions and reducing the probability of recurrence of stenosis;

[0058] 6. The adjustable device for Eustachian tube placement during surgery provided by the present invention has an implantation depth mark on the surface of the tube body, which is helpful for the surgeon to clearly control the implantation position and depth, thereby reducing the operation time and unnecessary complications.

[0059] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An adjustable device for Eustachian tube placement during surgery, characterized in that: It comprises a tube placement device body (100), a pharyngeal opening end of the Eustachian tube of the tube placement device (200) and a tympanic cavity opening end of the Eustachian tube of the tube placement device (300); The tube placement device body (100) is in the shape of a spiral tube, and the two ends of the tube placement device body (100) are respectively connected to the pharyngeal opening end (200) of the tube placement device and the tympanic cavity opening end (300) of the Eustachian tube placement device; The pharyngeal opening end (200) of the Eustachian tube of the tube placement device is composed of four pharyngeal opening end limiting flaps (210), and the four pharyngeal opening end limiting flaps (210) are connected to each other to form a semi-ellipsoid shape with a smooth surface and a hollow interior; The Eustachian tube tympanic cavity opening end (300) of the tube placement device is composed of four tympanic cavity opening end limiting flaps (310), and the four tympanic cavity opening end limiting flaps (310) are interconnected to form a semi-ellipsoid shape with a smooth surface and a hollow interior.

2. The adjustable device for intraoperative Eustachian tube placement according to claim 1, characterized in that: The four pharyngeal end limiting flaps (210) and the four tympanic cavity end limiting flaps (310) are connected by gelatin.

3. The adjustable device for intraoperative Eustachian tube catheterization according to claim 1, characterized in that: The diameter of the helical tube-shaped tube placement device body (100) can be adjusted within a range of 1 mm to 2 mm.

4. The adjustable device for intraoperative Eustachian tube catheterization according to claim 1, characterized in that: The material of the catheter placement device body (100) is polylactic acid.

5. The adjustable device for intraoperative Eustachian tube placement according to claim 1, characterized in that: A lactide-glycolide copolymer is arranged in the tube of the catheter placement device body (100), and a drug coating is arranged on the inner wall of the Eustachian tube pharyngeal end (200) and the Eustachian tube tympanic cavity end (300) of the catheter placement device, wherein the drug coating is a drug stent (400) composed of mometasone furoate, lactide-glycolide copolymer and polyethylene glycol.

6. The adjustable device for intraoperative Eustachian tube catheterization according to claim 1, characterized in that: The length of the adjustable device for Eustachian tube placement during surgery is 30 mm-40 mm.

7. The adjustable device for intraoperative Eustachian tube placement according to claim 1, characterized in that: A first mark mark (110), a second mark mark (120) and a third mark mark (130) are respectively arranged on the body (100) of the tube placement device. The distance between the first mark mark (110) and the tail end of the Eustachian tube pharyngeal end (200) of the tube placement device is 10-13 mm, the distance between the second mark mark and the tail end of the Eustachian tube pharyngeal end (200) of the tube placement device is 18-20 mm, and the distance between the third mark mark (130) and the tail end of the Eustachian tube pharyngeal end (200) of the tube placement device is 35-40 mm.

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