Adjustable soft clamp type device for protecting tympanic nerves in operation

Abstract

The invention relates to the technical field of medical instruments, in particular to an adjustable soft clamp type device for protecting drumhead nerves in an operation, which comprises a left side protection device and a right side protection device, the left side protection device and the right side protection device are both in a semi-cylindrical tubular shape, and one edge opening of the left side protection device is connected with one edge opening of the right side protection device. An insection groove is formed in the face, located inside the pipe, of the other edge opening of the left side protection device, and an insection protrusion is arranged on the face, located outside the pipe, of the other edge opening of the right side protection device. When the left side protection device and the right side protection device are folded, the insection protrusions are clamped in the insection grooves. The method has the advantages that the method is simple and easy to use, operation complexity is reduced, and operation time is saved; the drumhead nerve is highly protected, and the operation risk is reduced; the material has good biocompatibility, can protect the tympanic nerves during operation, and can prevent adhesion between the tympanic chamber and surrounding tissues after operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical appliances, and more particularly to an adjustable soft clamping device for protecting the chorda tympani nerve during surgery. Background Art

[0002] The chorda tympanic nerve (CTN) is a mixed nerve with sensory and motor functions. The sensory function is reflected in the fact that the CTN controls the taste of the anterior 2 / 3 of the tongue on the same side, increasing the sensitivity of taste cells to sweet and salty tastes; the motor function is that it contains preganglionic parasympathetic axons that control the submandibular gland and sublingual gland, which can promote the secretion of saliva by the salivary glands at the floor of the mouth.

[0003] CTN enters the middle ear at the level of the tympanic membrane ring, runs on the inner side of the handle of the malleus ossicle, and its tympanic segment is completely exposed in the middle ear. In otolaryngology surgery, with the widespread development of endoscopic surgery, intraoperative bone grinding is used in more and more surgeries, and intraoperative bone grinding can easily damage the chorda tympani nerve. Studies have shown that about 15%-22% of patients with non-inflammatory middle ear lesions will experience taste disorders after intraoperative CTN damage, typically manifested as intermittent metallic taste at the tip of the tongue on the same side. During the postoperative follow-up of patients undergoing middle ear surgery abroad, it was found that patients who had CTN severed during surgery would have persistent taste changes, accompanied by irreversible anatomical changes, such as a permanent decrease in the number and volume of mushroom-shaped taste buds on the severed side, a significant decrease in the number of neurons that innervate a single taste bud, and an imbalance between the volume of taste buds and the number of innervated nerves.

[0004] Secondly, the compensatory mechanism of the peripheral nerve cannot fully restore the function of the cut side of the nerve to the level of the uncut side. For patients who are chefs or sommeliers, even a mild taste disorder can have a serious impact on their careers and lives. During the recovery period of the patient, the decline in living standards caused by the loss of taste cannot be ignored. According to the main complaints of patients during postoperative follow-up, the risk of various complications after cutting the CTN is extremely high, including taste disorders, tongue paralysis and other symptoms, and there is currently no good treatment for this series of symptoms. Although some patients have recovered their taste after CTN cutting, this may be attributed to the adaptive changes of the patient's taste buds, not the actual recovery of the patient's taste function. Therefore, in middle ear surgery, attention should be paid to preserving the integrity of the CTN to reduce related disputes caused by taste changes after surgery. The protection of the chorda tympani nerve during surgery is an important but challenging task.

[0005] Due to the lack of protective devices, the operation can only rely on the surgeon's careful operation, which has certain risks and limitations. Therefore, a safer and more effective protective device is needed.

[0006] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0007] The object of the present invention is to provide an adjustable soft clamping device for protecting the chorda tympani nerve during surgery. The adjustable soft clamping device highly protects the chorda tympani nerve and reduces the risk of surgical damage to the chorda tympani nerve.

[0008] The present invention provides an adjustable soft clamping device for protecting the chorda tympani nerve during surgery, comprising a left side protection device and a right side protection device; the left side protection device and the right side protection device are both semi-cylindrical tube-shaped, and one side of the left side protection device is connected to one side of the right side protection device; a serrated groove is provided on the other side of the left side protection device located inside the tube, and a serrated protrusion is provided on the other side of the right side protection device located outside the tube; when the left side protection device and the right side protection device are closed, the serrated protrusion is snapped into the serrated groove.

[0009] Furthermore, the left side protection device and the right side protection device are in an open state in a natural state.

[0010] Furthermore, the left side protection device and the right side protection device are integrally connected.

[0011] Furthermore, the lengths of the left side protection device and the right side protection device are 7 mm-20 mm.

[0012] Furthermore, the left side protection device and the right side protection device are made of biocompatible materials.

[0013] Furthermore, the inner diameter of the adjustable soft clamping device for protecting the chorda tympani nerve during surgery is 0.5 mm-1.5 mm.

[0014] Furthermore, 20 to 60 of the tooth grooves are provided on one inner side of the tube of the left side protection device.

[0015] The present invention provides an adjustable soft clamping device for protecting the chorda tympani nerve during surgery. The left side protective device and the right side protective device are made of biocompatible materials, have sufficient strength and flexibility, and can be placed in the tympanic cavity through the external auditory canal. During surgery, the left side protective device and the right side protective device are individually cut to a suitable length according to the length of the chorda tympani nerve, and the open left side protective device and the right side protective device are placed near the chorda tympani nerve through the external auditory canal, and the left side protective device and the right side protective device are clamped around the chorda tympani nerve by a clamping device. The left side protective device and the right side protective device are merged around the chorda tympani nerve, and the tooth-marked protrusions are clamped in the tooth-marked grooves, and are individually adjusted according to the diameter of the chorda tympani nerve to form a The invention forms a complete hollow cylinder that just embraces but does not clamp, thereby protecting the chorda tympani nerve from damage by surgical instruments. The gaps left in the multiple clamping grooves in the middle can ensure the blood supply of the chorda tympani and prevent ischemic necrosis of the chorda tympani nerve caused by complete embracing and clamping. After the operation, the biocompatible material does not need to be taken out, the material is soluble, and the adhesion of the chorda tympani nerve to the surrounding tissues after the operation is prevented. For some patients who need a second operation, it is easy to find and separate the chorda tympani nerve during the operation, which is beneficial for secondary protection and saves operation time. The invention is simple and easy to use, reduces the complexity of the operation, highly protects the chorda tympani nerve, and reduces the risk of the operation. The material has good biocompatibility and has no side effects on the patient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of an adjustable soft clamping device for protecting the chorda tympani nerve during surgery provided by an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the open state of the adjustable soft clamp device used to protect the chorda tympani nerve during surgery.

[0018] Figure 3 for Figure 1 Schematic diagram of the planar structure of the adjustable soft clamp device used to protect the chorda tympani nerve during surgery.

[0019] Figure 4 for Figure 1 Schematic diagram of the planar structure of the open state of the adjustable soft clamp device used to protect the chorda tympani nerve during surgery.

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

[0021] 100. Left side protection device

[0022] 200. Right side protection device

[0023] 300, Tooth groove

[0024] 400, tooth pattern raised

[0025] 500、Chadona tympani nerve DETAILED DESCRIPTION

[0026] 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.

[0027] 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.

[0028] Example 1

[0029] Figure 1 This is a schematic diagram of the structure of an adjustable soft clamping device for protecting the chorda tympani nerve during surgery provided by an embodiment of the present invention. Figure 2 for Figure 1 Schematic diagram of the structure of the open state of the adjustable soft clamp device used to protect the chorda tympani nerve during surgery, Figure 3 for Figure 1 Schematic diagram of the planar structure of the adjustable soft clamp device used to protect the chorda tympani nerve during surgery. Figure 4 for Figure 1 Schematic diagram of the planar structure of the open state of the adjustable soft clamp device used to protect the chorda tympani nerve during surgery. Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The adjustable soft clamp device for protecting the chorda tympani nerve during surgery provided by an embodiment of the present invention comprises a left side protection device 100 and a right side protection device 200; the left side protection device 100 and the right side protection device 200 are both semi-cylindrical tubes, and one side of the left side protection device 100 is connected to one side of the right side protection device 200; a toothed groove 300 is provided on the other side of the left side protection device 100 located inside the tube, and a toothed protrusion 400 is provided on the other side of the right side protection device 200 located outside the tube; when the left side protection device 100 and the right side protection device 200 are closed, the toothed protrusion 400 is snapped into the toothed groove 300. Furthermore, the left side protection device 100 and the right side protection device 200 are in an open state in a natural state; the left side protection device 100 and the right side protection device 200 are made of biocompatible materials. The device uses polylactic acid, commonly known as PLA, which is a thermoplastic made from renewable resources such as corn starch, cassava roots or sugarcane. It is a new type of biodegradable material with the characteristics of environmental protection, renewable and biodegradable. The inserted chorda tympani protection device does not need to be removed and can dissolve by itself, which can prevent the adhesion of the chorda tympani nerve to the surrounding tissues. For some patients who need a secondary operation, it is easy to find and separate the chorda tympani nerve, which plays a role in further protection and saving operation time.

[0030] The soft clip device for protecting the chorda tympani nerve during surgery provided by the present invention, the left side protection device 100 and the right side protection device 200 are made of biocompatible materials, have sufficient strength and flexibility, and can be placed in the tympanic cavity through the external auditory canal; during surgery, the left side protection device 100 and the right side protection device 200 are individually cut to a suitable length according to the length of the chorda tympani nerve, and the open left side protection device 100 and the right side protection device 200 are placed near the chorda tympani nerve through the external auditory canal, and the left side protection device 100 and the right side protection device 200 are merged around the chorda tympani nerve 500 by using an otologic microsurgery forceps According to the diameter of the individual chorda tympani nerve, the toothed protrusion 400 is snapped into the toothed groove 300 to form a complete hollow cylinder that just embraces but does not clamp, thereby protecting the chorda tympani nerve 500 from damage by surgical instruments. Gaps are left in multiple clamping grooves to ensure the blood supply of the chorda tympani and prevent ischemic necrosis of the chorda tympani nerve caused by complete embracing and clamping. After the operation, the biocompatible material does not need to be removed. The present invention is simple and easy to use, reduces the complexity of the operation, highly protects the chorda tympani nerve, and reduces the risk of surgery. The material has good biocompatibility and has no side effects on patients.

[0031] Furthermore, the left side protection device 100 and the right side protection device 200 of the present invention are integrally connected.

[0032] Furthermore, the exposed length of the chorda tympani nerve 500 in the tympanic cavity is 10.28 mm on average, with a standard deviation of 2.10 mm. The diameter of the external auditory canal of a normal adult is approximately 7 to 8 mm. The length of the left protective device 100 and the right protective device 200 of the present invention is 7 mm-20 mm, and can be cut to length according to the length of the individual chorda tympani nerve.

[0033] Furthermore, the inner diameter of the adjustable soft clamping device for protecting the chorda tympani nerve during surgery of the present invention can be adjusted (by the combined length of the toothed protrusion 400 and the toothed groove 300), and the adjustment range of the inner diameter is 0.5mm-1.5mm.

[0034] Furthermore, in the present invention, 20-60 tooth grooves 300 are provided on one side of the inner tube of the left side protection device 100; it should be noted that the number of tooth grooves 300 can be used to calculate the circumference through the adjustment range of the inner diameter (0.5mm-1.5mm), and then the length of the local circumference occupied by each tooth groove 300 is calculated through the central angle of the tooth groove 300, and then half of the circumference value is divided by the length of the local circumference occupied by each tooth groove 300, so that the number of tooth grooves 300 can be calculated.

[0035] Based on the above description, it can be seen that the advantages of the present invention are:

[0036] The soft clamping device for protecting the chorda tympani nerve during surgery of the present invention, the left side protective device 100 and the right side protective device 200 are made of biocompatible materials, have sufficient strength and flexibility, can be placed in the tympanic cavity through the external auditory canal, can dissolve, can protect the chorda tympani nerve from damage during surgery, can prevent the chorda tympani nerve from adhesion to surrounding tissues after surgery, for some patients who need a second operation, can save the time of surgical search and separation of the chorda tympani nerve, and further reduce the probability of damage to the tympanic cavity nerve during the second operation; during the operation, the open left side protective device 100 and the right side protective device 200 are placed near the chorda tympani nerve through the external auditory canal, and the left side protective device 100 and the right side protective device 200 are surrounded by the chorda tympani nerve 500 through the clamping device; the left side protective device 100 and the right side protective device The serrated protrusions 400 are snapped into the serrated grooves 300, and a complete hollow cylinder that just embraces but does not clamp is formed according to the diameter of the individual chorda tympani nerve, thereby protecting the chorda tympani nerve 500 from damage by surgical instruments. After the operation, the biocompatible material does not need to be taken out and can dissolve on its own, thereby preventing the chorda tympani nerve from adhering to the surrounding tissues. For some patients who need a second operation, it is easy to find and separate the chorda tympani nerve, thereby further protecting the nerve and saving operation time. The present invention is simple and easy to use, reduces the complexity of the operation, saves operation time, performs individualized adjustment according to the length and diameter of the chorda tympani nerve, and reduces material waste. The chorda tympani nerve is highly protected and the surgical risk is reduced. The material has good biocompatibility and is absorbable, and has no side effects on patients.

[0037] 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 soft clamping device for protecting the chorda tympani nerve during surgery, characterized in that: It comprises a left side protection device (100) and a right side protection device (200); The left side protection device (100) and the right side protection device (200) are both in the shape of a semi-cylindrical tube, and one side of the left side protection device (100) is connected to one side of the right side protection device (200); A toothed groove (300) is provided on the other side of the left side protection device (100) located inside the tube, and a toothed protrusion (400) is provided on the other side of the right side protection device (200) located outside the tube; when the left side protection device (100) and the right side protection device (200) are closed, the toothed protrusion (400) is engaged in the toothed groove (300).

2. The adjustable soft clamp device for protecting the chorda tympani nerve during surgery according to claim 1, characterized in that: The left side protection device (100) and the right side protection device (200) are in an open state in a natural state.

3. The adjustable soft clamping device for protecting the chorda tympani nerve during surgery according to claim 1, characterized in that: The left side protection device (100) and the right side protection device (200) are integrally connected.

4. The adjustable soft clamp device for protecting the chorda tympani nerve during surgery according to claim 1, characterized in that: The lengths of the left side protection device (100) and the right side protection device (200) are 7 mm to 20 mm.

5. The adjustable soft clamp device for protecting the chorda tympani nerve during surgery according to claim 1, characterized in that: The left side protection device (100) and the right side protection device (200) are made of biocompatible materials.

6. The adjustable soft clamp device for protecting the chorda tympani nerve during surgery according to claim 1, characterized in that: The inner diameter of the adjustable soft clamping device for protecting the chorda tympani nerve during surgery is 0.5 mm-1.5 mm.

7. The adjustable soft clamp device for protecting the chorda tympani nerve during surgery according to claim 6, characterized in that: 20 to 60 tooth grooves (300) are provided on one side of the inner tube of the left side protection device (100).

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