A nasal cavity protection device for endoscopic surgical corridor

Abstract

The application relates to a nasal cavity protection device for a transnasal endoscopic surgery channel, which comprises an inner layer (1) and an outer layer (2) which are integrally arranged, wherein the outer layer (2) is sleeved on the surface of the inner layer, the transition section of the integral connection between the inner layer (1) and the outer layer (2) is a retractable and resilient structure, the inner layer (1) is used as an insertion end (3) which is inserted into the nasal cavity, the port at the other end of the inner layer (1) is outwardly folded and reversely sleeved to form a protective cover which is used as an extension end (4). Compared with the prior art, the device has good retractable and resilient performance, can be self-adapted to nasal cavities with different shapes and sizes, and can effectively protect the transnasal endoscopic surgery channel nasal cavity protection device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, and relates to a nasal cavity protection device for a transnasal endoscopic surgery channel. BACKGROUND

[0002] Transnasal endoscopic surgery is a minimally invasive surgical method, which is performed by entering the cranial base or the saddle area through the nasal cavity. During the surgery, surgical instruments need to be repeatedly inserted into the surgical area through the nasal cavity, which can easily cause damage to the nasal mucosa and cause complications such as bleeding and edema. In order to protect the nasal mucosa and reduce surgical complications, a nasal cavity protection device is usually used in clinical practice.

[0003] At present, there are various nasal cavity protection devices for transnasal endoscopic surgery channels on the market. For example, Chinese Patent Publication No. CN111436891A discloses a nasal cavity protection device for a transnasal endoscopic surgery channel, which includes a protection sheath, the inside of the protection sheath forms a channel, one end of the channel is an extension end, and the other end is an insertion end; the protection sheath includes a short cone part, a contraction part and a long cone part connected in sequence from the extension end to the insertion end; the protection sheath is woven by a single wire and has a grid structure. The device solves the problems of poor contractility and easy falling off to some extent through special structural design. However, the device needs to be put into the nasal cavity using a special tool, which is complicated to operate, and the use of the tool can also cause other damage. Moreover, although the rounded edge of the insertion end is designed to avoid scratching, the rounded edge is generally folded and bonded or bonded with an additional annular edge, which can easily fall off and fail.

[0004] Chinese Patent Publication No. CN109549712A discloses a nasal cavity mucosa protection device for a transnasal endoscopic surgery channel, which is formed by a nylon textile layer, an internal channel is formed, one end of the channel is an extension end, and the other end is an insertion end, and a gas bag for supporting in the nasal cavity is arranged between the extension end and the insertion end. The device can better decompose the impact force of the instrument through the weaving structure of the nylon textile layer, and can protect the inner wall of the nasal cavity. However, the device has poor contractility, can only be made to order for different nasal cavity structures in general, is easy to fall off, has insufficient expansion force or is difficult to put into the nasal cavity.

[0005] However, the existing nasal cavity protection devices for transnasal endoscopic surgery channels still have some problems. First, most of the devices have insufficient contractility, which makes it difficult to adapt to the nasal cavity structures of different patients, and often needs to be made to order for different nasal cavity structures, which increases the medical cost and the complexity of use. Second, the existing devices have insufficient or excessive expansion force in the nasal cavity. Insufficient expansion force can easily cause the device to fall off, while excessive expansion force makes it difficult to put into the nasal cavity. Third, some devices need to be put into the nasal cavity using a special tool, which is complicated to operate, and the use of the tool can cause other damage. SUMMARY

[0006] The present application aims to overcome the defects of the prior art and provide a nasal cavity protection device for a nasal endoscopic surgery channel, which has good shrinkage and rebound performance, can adapt to nasal cavities of different shapes and sizes, and can effectively protect the nasal cavity mucosa.

[0007] The present application can achieve the above-mentioned purposes by the following technical solutions: a nasal cavity protection device for a nasal endoscopic surgery channel, which comprises an inner layer and an outer layer arranged integrally, wherein the outer layer is sleeved on the surface of the inner layer, the transition section of the integrated connection between the inner layer and the outer layer is a structure capable of being contracted and rebounded, serves as an insertion end inserted into the nasal cavity, and the port at the other end of the inner layer is outwardly folded and reversely sleeved to form a protective cover, which serves as an extension end.

[0008] Further, the device is integrally woven from elastic material into a pipeline shape with a middle necking section and two end flaring sections, one end of the pipeline is folded and reversely sleeved along the middle necking section to form an inner-outer double-layer structure, the necking section constitutes a contractible and reboundable insertion end, and the other end is folded and reversely sleeved at the port of the outer layer to form a protective cover.

[0009] Further, the elastic material comprises nylon, polyester fiber or PET.

[0010] Further, the elastic material is woven into a grid-shaped pipeline, the grid is a rhombus, and the side length of the rhombus grid gradually increases from the necking section to the flaring section, so that the inner diameter of the pipeline before being folded gradually increases from the necking section to the flaring section.

[0011] Further, the pipeline before being folded comprises a first section as the inner layer, a second section as the outer layer, a necking section between the first section and the second section, a flaring section of the port of the first section, and the second section is folded and reversely sleeved on the surface of the first section to form the outer layer, the necking section is located at the folding position, and the necking section constitutes the insertion end after being folded, and the flaring section constitutes the protective cover after being folded.

[0012] Further, the side length L1 of the rhombus grid of the necking section is 0.1-1 mm, the side length L2 of the rhombus grid of the first section gradually increases from the necking section to the flaring section, L2 is 1-3 times of L1, the side length L3 of the rhombus grid of the flaring section is 3-5 times of L3, and the side length L4 of the rhombus grid of the second section gradually increases from the necking section to the flaring section, and L2 is 1-3 times of L1. By controlling the grid aperture size, the diameters of different sections of the pipeline are different, so that the double-layer structure formed after being folded has a gradually expanding inner diameter of the insertion end, the inner diameter gradually increases from the connection between the insertion end and the nasal cavity port to the end of the insertion end, and due to the mutual restraint force between the folded double-layer elastic materials, the insertion end is attached to the inner wall of the nasal cavity under the rebound force after being inserted into the nasal cavity, can expand the operation space of the channel as much as possible, and facilitates the development of the surgery.

[0013] The extended end is formed by folding the flared section, which can facilitate the rapid and accurate entry and exit of instruments, and can assist in guiding and supporting the entering instruments, making surgery easier.

[0014] After the neck section is folded, the elastic material naturally becomes a fluffy insertion end under the action of the folding force. When in use, the fluffy insertion end is squeezed and compressed and then inserted into the nasal cavity. After the pressure is released, the elastic material expands along the inner wall of the nasal cavity under the action of the rebound force.

[0015] Furthermore, the outermost diameter of the insertion end in a natural state is 10-30 mm.

[0016] Furthermore, after the flared section is folded, it is buckled back at the second section port and connected thereto to serve as a protruding end.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The device of the present invention features a double-layer structure composed of an integrated, folded elastic material. By varying the density of the elastic material at different locations, the inner diameter of the insertion end gradually increases from its junction with the nasal cavity entrance to its distal end. Furthermore, due to the mutual restraint between the folded double layers of elastic material, the insertion end adheres to the nasal cavity wall due to its rebound force after insertion, maximizing the operating space within the passage and facilitating surgical procedures. Furthermore, the double-layer elastic design effectively dissipates the impact force even if the instrument impacts the nasal passage, providing excellent protection for the nasal lining.

[0019] The extension is formed by folding the flared section, facilitating quick and accurate instrument entry and exit, and providing auxiliary guidance and support for entering instruments, facilitating surgical procedures. The double-layer elastic structure improves support compared to a single layer. Even if the extension is accidentally impacted by operation, the cushioning properties of the elastic material on both sides can mitigate the impact, thereby preventing subsequent damage.

[0020] The grid-like design can promote the rapid coagulation of nasal bleeding on the channel layer, preventing the bleeding from flowing quickly to the bottom of the nasal cavity, affecting the surgical field of view and contaminating the endoscope lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the device of the present invention.

[0022] Figure 2 The device of the present invention is a pipe structure woven from elastic materials before being folded.

[0023] Figure 3 for Figure 2 Schematic diagram of the structure in which the second section of the middle pipe structure is folded over and sheathed on the surface of the first section. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will now be described in detail with specific reference being made to the figures. It is to be understood that the description of the embodiments is only by way of explanation and is not intended to limit the application. The application can be practiced in a variety of embodiments and implementations, some of which are described herein, without departing from the spirit or scope of the application. It is to be understood that the following examples and embodiments are merely illustrative and are not intended to limit the scope of the application. The following examples and embodiments can be combined with each other and with other embodiments described herein, without departing from the spirit or scope of the application.

[0025] Embodiments of the present application will be described in detail below. Throughout this specification, like reference numerals in different drawings represent the same or similar elements. As used herein, the terms "substantially", "generally", "essentially", and "approximately" are used to describe and account for small variations in the specified value. When used in connection with an event or circumstance, the terms can refer to instances in which the event or circumstance occurs exactly, as well as instances in which the event or circumstance occurs approximately.

[0026] In this specification, amounts, ratios, and other quantities are sometimes presented in range format. It is to be understood that the range format is used for convenience and brevity and should be construed as having been followed had each number from the range been individually listed. To be clear, this is not intended to limit the scope or application of the application in any way.

[0027] Embodiments

[0028] A nasal cavity protection device for endoscopic nasal surgery channel, as shown in Figure 1 which comprises an inner layer 1 and an outer layer 2 arranged integrally, wherein the outer layer 2 is sleeved on the surface of the inner layer 1, and the transition section of the integral connection between the inner layer 1 and the outer layer 2 is a retractable and resilient structure, which serves as an insertion end 3 extending into the nasal cavity. The port at the other end of the inner layer 1 is outwardly folded and reversely sleeved to form a protective cover, which serves as an extension end 4.

[0029] Specifically, the device is integrally woven from elastic material into a tubular shape with a narrowed middle section and widened ends, i.e., a grid-shaped tube woven from elastic material, with the grid being rhombic and the side length of the rhombic grid gradually increasing from the narrowed section to the widened section, so that the inner diameter of the tube gradually increases from the narrowed section to the widened section before being folded, as shown in Figure 2As shown, the pipeline before folding includes a first section 11 as the inner layer, a second section 12 as the outer layer, a necked section 13 between the first section 11 and the second section 12, and a flared section 14 at the port of the first section 11, wherein the second section 12 is folded back to cover the surface of the first section 11 to form the outer layer 2, and the necked section 13 is located at the folding position and forms the insertion end 3 after folding (as shown in Figure 3 As the material used is elastic and woven, the necked section 13 is fluffy in the natural state after folding under the action of the folding force. In use, the fluffy insertion end 3 is compressed and inserted into the nasal cavity, and then expands along the inner wall of the nasal cavity under the action of the elastic force after the pressure is released. This design allows the device to be easily inserted into the nasal cavity and automatically expand after insertion, tightly adhering to the inner wall of the nasal cavity, and can adapt to different shapes and sizes of the nasal cavity. The diameter of the insertion end 3 is 20mm in the natural state, which is suitable for the anatomical structure of most adult nasal cavities, providing sufficient protection without excessive pressure on the nasal cavity.

[0030] After the flared section 14 is folded back, it is buckled at the port of the second section 12 and connected thereto as the extension end 4. The connection can be adhesive or other means. This design makes the device more stable during use and less likely to fall off, and also facilitates the operation of medical personnel.

[0031] The elastic material includes nylon, polyester fiber or PET. In this embodiment, polyester fiber is preferably used as the woven material, which has good elastic recovery performance and biocompatibility, and is suitable for application in medical devices.

[0032] In this embodiment, the elastic material is woven with different densities at different positions to gradually increase the inner diameter of the insertion end from the connection between the insertion end and the port of the nasal cavity to the end of the insertion end. Due to the mutual restraint force between the folded double-layer elastic material, the insertion end adheres to the inner wall of the nasal cavity under the action of the elastic force after insertion into the nasal cavity, which can expand the operation space of the channel as much as possible and facilitate the operation. In this embodiment, the side length L1 of the diamond grid of the necked section 13 is 0.5mm, the side length L2 of the diamond grid of the first section 11 from the necked section to the flared section gradually increases, and L2 is twice L1, i.e. 1.0mm, the side length L3 of the diamond grid of the flared section 14 is four times L1, i.e. 2.0mm, and the side length L4 of the diamond grid of the second section 12 from the necked section to the flared section gradually increases, and L4 is twice L1, i.e. 1.0mm. This design of grid side length makes the device have different elasticity and support force at different positions, better adapting to the anatomical structure in the nasal cavity.

[0033] This design allows the device to adaptively adjust according to the anatomical structure of the nasal cavity, providing better protection.

[0034] The working principle of the device is: before the endoscopic surgery, the medical staff compresses the insertion end 3 of the device, inserts it into the patient's nasal cavity, and then releases the pressure. The insertion end 3 expands along the inner wall of the nasal cavity under the rebound force of the elastic material, forming a protective layer to prevent the endoscope and surgical instruments from directly contacting the nasal mucosa, reducing damage to the nasal cavity. At the same time, the antibacterial coating and the blood clotting coating on the outer layer 2 can reduce the risk of infection and bleeding. After the surgery is completed, the medical staff can easily remove the device from the nasal cavity, and the whole process causes little trauma to the patient and the patient recovers quickly.

[0035] The advantages of the device are: the integrated design makes the structure simple and easy to use; the use of elastic material makes the device adapt to the anatomical structure of different patients' nasal cavities; the grid design ensures sufficient support without hindering the surgical field and instrument operation.

[0036] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. Those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to go through creative labor. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art within the scope of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A nasal cavity protection device for endoscopic nasal surgery, characterized in that: The invention comprises an inner layer (1) and an outer layer (2) which are integrally arranged, wherein the outer layer (2) is sleeved on the surface of the inner layer, and a transition section where the inner layer (1) and the outer layer (2) are integrally connected is a retractable and resilient structure, which serves as an insertion end (3) that extends into the nasal cavity, and a port at the other end of the inner layer (1) is folded outward to form a protective cover, which serves as an extension end (4); The device is made of an elastic material woven into an integral shape, the elastic material is woven into a pipe shape with a middle constriction and flared ends, one end of which is folded back and sleeved along the middle constriction to form an inner and outer double-layer structure, the constriction forming a retractable and resilient insertion end (3), and the other end folded back and sleeved on the outer layer (2) port to form a protective cover; The elastic material is woven into a grid-like pipe, the grid is diamond-shaped, and the side length of the diamond-shaped grid gradually increases from the necking to the flaring section, so that the inner diameter of the pipe before folding gradually increases from the necking to the flaring section; The pipe before being folded comprises a first section (11) as an inner layer, a second section (12) as an outer layer, a constricted section (13) between the first section (11) and the second section (12), a flared section (14) at the end of the first section (11), the second section (12) being folded and sheathed on the surface of the first section (11) to form an outer layer (2), the constricted section (13) being located at the folded portion and forming an insertion end (3) after being folded, and the flared section (14) forming a protective cover after being folded; The side length L1 of the rhombus grid of the shrinking section (13) is 0.1-1 mm, the side length L2 of the rhombus grid of the first section (11) increases gradually from the shrinking section to the expanding section, and L2 is 1-3 times of L1, the side length L3 of the rhombus grid of the expanding section (14) is 3-5 times of L3, and the side length L4 of the rhombus grid of the second section (12) increases gradually from the shrinking section to the expanding section, and L2 is 1-3 times of L1; After the necking section (13) is folded, the elastic material naturally becomes fluffy and extends into the end (3) under the action of the folding force. When in use, the fluffy and extending end (3) is squeezed and compressed and then inserted into the nasal cavity. After the pressure is released, the elastic material expands along the inner wall of the nasal cavity under the action of the rebound force.

2. The nasal cavity protection device for endoscopic nasal surgery according to claim 1, characterized in that: The elastic material includes nylon, polyester fiber or PET.

3. The nasal cavity protection device for endoscopic nasal surgery according to claim 1, characterized in that: The distal end diameter of the insertion end (3) in a natural state is 10 to 30 mm.

4. The nasal cavity protection device for endoscopic nasal surgery according to claim 1, characterized in that: After the flared section (14) is folded, it is buckled at the end of the second section (12) and connected thereto to serve as the protruding end (4).

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