Nasal cavity protection device for transnasal endoscopic surgery channel

Abstract

The nasal cavity protection device comprises an inner layer (1) and an outer layer (2) which are integrally arranged, the surface of the inner layer is sleeved with the outer layer (2), a transition section where the inner layer (1) and the outer layer (2) are integrally connected is of a retractable and rebounding structure and serves as an extending-in end (3) extending into the nasal cavity, and a port of the other end of the inner layer (1) is turned outwards and reversely sleeved to form a protection cover. And a protruding end (4). Compared with the prior art, the nasal cavity protection device for the transnasal endoscopic surgery channel has good contraction resilience performance, can adapt to nasal cavities of different shapes and sizes, and can effectively protect mucous membranes of the nasal cavities.

Description

Technical Field

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

[0002] Transnasal endoscopic surgery is a minimally invasive surgical method, which enters the skull base or the sella turcica through the nasal cavity for surgical operations. During the operation, surgical instruments need to repeatedly enter the surgical area through the nasal cavity, which is likely to cause damage to the nasal mucosa, leading to complications such as bleeding and edema. In order to protect the nasal mucosa and reduce surgical complications, nasal cavity protection devices are usually used clinically.

[0003] Currently, there are already 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. The device includes a protection sheath, a channel is formed inside the protection sheath, one end of the channel is an extending end, and the other end is an inserting end; the protection sheath includes a short cone part, a contraction part and a long cone part which are sequentially connected from the extending end to the inserting end; the protection sheath is woven by single filaments and has a grid structure. Through a special structural design, this device solves the problems of poor shrinkability and easy detachment to a certain extent. However, this device needs to use special tools to be placed into the nasal cavity, the operation is complex, and the use of the tools is also likely to cause other injuries. Moreover, although the blunt edge is designed at the inserting end to avoid scratching, the blunt edge generally adopts a folded and bonded or additionally bonded annular edge, and this structure is easy to fall off and fail.

[0004] Chinese Patent Publication No. CN109549712A discloses a nasal mucosa protection device for a transnasal endoscopic surgery channel, which is formed by surrounding a nylon textile layer, a channel is formed inside, one end of the channel is an extending end, and the other end is an inserting end, and further includes an airbag arranged between the extending end and the inserting end for supporting at the nasal cavity opening. Through the weaving structure of the nylon textile layer, this device can better decompose the impact force of the instrument and play a role in protecting the inner wall of the nasal cavity. However, the device has poor shrinkability, generally can only be customized for different nasal cavity structures, is easy to fall off, has insufficient opening force or is difficult to be placed into the nasal cavity.

[0005] However, the existing nasal cavity protection devices for transnasal endoscopic surgery channels still have some problems: First, most devices have insufficient shrinkage performance and are difficult to adapt to the nasal cavity structures of different patients. Often, they need to be customized for different nasal cavity structures, increasing the medical cost and the complexity of use; Second, the opening force of the existing devices in the nasal cavity is insufficient or too large. Insufficient opening force is likely to cause the device to fall off, while too large opening force makes it difficult to be placed into the nasal cavity; Third, some devices need to use special tools to be placed into the nasal cavity, the operation is complex, and the use of the tools may cause other injuries. Summary of the Invention

[0006] The object of the present invention is to overcome the defects existing in the above-mentioned prior art and provide a nasal cavity protection device for a transnasal endoscopic surgical channel, which has good shrinkage and rebound performance, can adapt to nasal cavities of different shapes and sizes, and can effectively protect the nasal mucosa.

[0007] The object of the present invention can be achieved by the following technical solutions: A nasal cavity protection device for a transnasal endoscopic surgical channel includes an inner layer and an outer layer which are integrally arranged, wherein the outer layer is sleeved on the surface of the inner layer, and the transition section where the inner layer and the outer layer are integrally connected is a structure that can shrink and rebound. As the insertion end extending into the nasal cavity, the port at the other end of the inner layer is turned outwards and reversely sleeved to form a protective cover, which serves as the protruding end.

[0008] Furthermore, the device is integrally woven from an elastic material. The elastic material is woven into a pipe shape with a constricted middle and widened ends. One end is turned over and reversely sleeved along the constricted middle to form a double-layer structure inside and outside. The constricted part constitutes the insertion end that can shrink and rebound, and the other end is turned over and reversely sleeved on the port of the outer layer to form a protective cover.

[0009] Furthermore, the elastic material includes nylon, polyester fiber or PET.

[0010] Furthermore, the elastic material is woven into a grid-shaped pipe, the grid is diamond-shaped, and the side length of the diamond-shaped grid gradually increases from the constricted part to the widened section, so that the inner diameter of the pipe before folding gradually increases from the constricted part to the widened part.

[0011] Furthermore, the pipe before folding includes a first section as the inner layer, a second section as the outer layer, a constricted section between the first section and the second section, a widened section at the port of the first section. The second section is turned over and reversely sleeved on the surface of the first section to form the outer layer. The constricted section is located at the folding place and forms the insertion end after folding. The widened section forms the protective cover after folding.

[0012] Furthermore, the side length L1 of the diamond-shaped grid in the constricted section is 0.1 - 1 mm. The side length L2 of the diamond-shaped grid of the first section gradually increases from the constricted section to the widened section, and L2 is 1 - 3 times of L1. The side length L3 of the diamond-shaped grid in the widened section is 3 - 5 times of L3. The side length L4 of the diamond-shaped grid of the second section gradually increases from the constricted section to the widened section, and L2 is 1 - 3 times of L1. By controlling the size of the grid aperture, the diameters of different sections of the pipe are different, so that a double-layer structure is formed after folding, and the inner diameter of the insertion end gradually expands. From the connection between the insertion end and the nasal cavity orifice end to the end of the insertion end, the inner diameter gradually increases. Moreover, due to the mutual restraint force between the folded double-layer elastic materials, after the insertion end is inserted into the nasal cavity, it fits against the inner wall of the nasal cavity under the action of the resilience force, which can widen the operation space of the channel as much as possible and facilitate the development of the operation.

[0013] The protruding end is formed by folding the flared section, which can facilitate the rapid and accurate entry and exit of instruments, and can provide auxiliary guidance and support for the entering instruments, facilitating the conduct of the operation.

[0014] After the necking section is folded, the elastic material extends into the end in a fluffy state under the action of the folding force. During use, the fluffy protruding end is compressed and inserted into the nasal cavity, and after the pressure is released, it unfolds along the inner wall of the nasal cavity under the action of the resilience force.

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

[0016] Furthermore, after the flared section is folded, it is buckled and connected to the port of the second section as the protruding end.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The device of the present invention is a double-layer structure formed by integrally braiding and folding an elastic material. By controlling the different weaving densities of the elastic material at different positions, the inner diameter of the protruding end gradually increases from the connection between the protruding end and the nasal cavity opening end to the end of the protruding end. Moreover, due to the mutual restraint force between the folded double-layer elastic materials, after the protruding end is inserted into the nasal cavity, it fits onto the inner wall of the nasal cavity under the action of the resilience force, which can widen the operating space of the channel as much as possible and facilitate the conduct of the operation. At the same time, due to the design of the double-layer elastic material, even if the instrument impacts the transnasal channel, the impact force can be well decomposed, providing a very high protection effect on the inner wall of the nasal cavity.

[0018] The protruding end is formed by folding the flared section, which can facilitate the rapid and accurate entry and exit of instruments, and can provide auxiliary guidance and support for the entering instruments, facilitating the conduct of the operation. The design of the double-layer elastic structure, compared with the single layer, greatly improves the support effect. Even if the protruding end is impacted due to accidental operation, the buffering performance of the bilateral elastic materials can also play a role in slowing down the impact, thus avoiding subsequent injuries.

[0019] The grid-like design can promote the rapid coagulation of nasal cavity bleeding on the channel layer, preventing the bleeding from quickly flowing to the bottom of the nasal cavity, affecting the surgical field of view and contaminating the endoscope lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the device of the present invention.

[0021] Figure 2 is a pipeline structure woven from an elastic material before folding of the device of the present invention.

[0022] Figure 3 is Figure 2 a schematic structural diagram of the second section of the pipeline structure in the figure being folded and sleeved reversely on the surface of the first section. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following describes the embodiments of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all embodiments. The present application can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0024] Embodiments of the present invention will be described in detail below. Throughout this specification, as used herein, the terms "substantially", "generally", "essentially" and "about" are used to describe and account for minor variations. When used in conjunction with an event or circumstance, the term can refer to instances where the event or circumstance occurs precisely and instances where the event or circumstance occurs very nearly.

[0025] In this specification, quantities, ratios, and other numerical values are sometimes presented in a range format herein. It should be understood that such range formats are for convenience and brevity and should be interpreted flexibly to include not only the explicitly specified numerical values as range limits but also all individual numerical values or sub-ranges subsumed within the said range as if each numerical value and sub-range were explicitly specified.

[0026] Embodiment A nasal cavity protection device for a transnasal endoscopic surgical channel, the structure of which is as Figure 1 shown, including 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 1, and the transition section where the inner layer 1 and the outer layer 2 are integrally connected is a structure that can be contracted and rebounded, serving as the insertion end 3 extending into the nasal cavity, and the port at the other end of the inner layer 1 is turned outward and reversely sleeved to form a protective cover, serving as the extension end 4.

[0027] Specifically, the device is integrally woven from an elastic material, and the elastic material is woven into a pipe shape with a constricted middle and widened ends, that is, a grid-shaped pipe is woven from the elastic material, the grid is diamond-shaped, and the side length of the diamond-shaped grid gradually increases from the constricted part to the widened section, so that the inner diameter of the pipe before folding gradually increases from the constricted part to the widened part, as 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 reduced-diameter 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. Among them, the second section 12 is folded and sleeved backwards on the surface of the first section 11 to form the outer layer 2, and the reduced-diameter section 13 is located at the folding position and forms an insertion end 3 after folding (as Figure 3 shown). Since the material used is woven from elastic material, the elastic material of the reduced-diameter section 13 is in a fluffy state under the action of the folding force in its natural state. When in use, the fluffy insertion end 3 is compressed and inserted into the nasal cavity, and after the pressure is released, it unfolds along the inner wall of the nasal cavity under the action of the resilience force. This design enables the device to be easily inserted into the nasal cavity and automatically unfold after insertion, closely adhering to the inner wall of the nasal cavity, and can adapt to nasal cavities of different shapes and sizes. The diameter of the outermost end of the insertion end 3 in its natural state is 20 mm, and this size is suitable for the anatomical structure of most adult nasal cavities, which can not only provide sufficient protection but also not cause excessive pressure on the nasal cavity.

[0028] After the flared section 14 is folded, it is buckled backwards at the port of the second section 12 and connected to it as an extension end 4. The connection method can be bonding or other methods. This design makes the device more stable during use, not easy to fall off, and at the same time convenient for medical staff to operate.

[0029] The elastic material includes nylon, polyester fiber or PET. In this embodiment, polyester fiber is preferably used as the weaving material, which has good elastic recovery performance and biocompatibility and is suitable for application in medical devices.

[0030] In this embodiment, by controlling the different weaving densities of the elastic material at different positions, the inner diameter of the insertion end gradually increases from the connection between the insertion end and the nasal cavity opening end to the end of the insertion end. Moreover, due to the mutual restraint force between the folded double-layer elastic materials, after the insertion end is inserted into the nasal cavity, it fits against the inner wall of the nasal cavity under the action of the resilience force, which can widen the operation space of the channel as much as possible and facilitate the development of the operation. In this embodiment, the side length L1 of the diamond grid of the reduced-diameter section 13 is 0.5 mm, the side length L2 of the diamond grid of the first section 11 gradually increases from the reduced-diameter section to the flared section, and L2 is 2 times of L1, that is, 1.0 mm, the side length L3 of the diamond grid of the flared section 14 is 4 times of L1, that is, 2.0 mm, and the side length L4 of the diamond grid of the second section 12 gradually increases from the reduced-diameter section to the flared section, and L4 is 2 times of L1, that is, 1.0 mm. This design of the grid side length enables the device to have different elasticity and support forces at different parts and better adapt to the anatomical structure in the nasal cavity.

[0031] This design enables the device to adaptively adjust according to the anatomical structure of the nasal cavity in the nasal cavity and provide better protection effect.

[0032] The working principle of this device is as follows: Before endoscopic sinus surgery, medical staff compress the insertion end 3 of the device and insert it into the patient's nasal cavity. Then, the pressure is released, and the insertion end 3 unfolds along the inner wall of the nasal cavity under the resilience of the elastic material, forming a protective layer to prevent the endoscope and surgical instruments from directly contacting the nasal mucosa and reducing damage to the nasal cavity. At the same time, the antibacterial coating and coagulation coating on the outer layer 2 can reduce the risk of infection and the amount of bleeding. After the surgery is completed, medical staff can easily remove the device from the nasal cavity. The whole process causes little trauma to the patient and has a quick recovery.

[0033] The advantages of this device are as follows: The integrated design makes the structure simple and easy to use; the use of elastic material enables the device to adapt to the nasal anatomical structures of different patients; the grid-like design not only ensures sufficient supporting force but also does not obstruct the surgical field of view and instrument operation.

[0034] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the invention. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present invention is not limited to the above embodiments, and all improvements and modifications made by those skilled in the art without departing from the scope of the present invention as disclosed should be within the protection scope of the present invention.

Claims

1. A nasal cavity protection device for a transnasal endoscopic surgery channel, characterized in that, It includes an inner layer (1) and an outer layer (2) which are integrally arranged, where the outer layer (2) is sleeved on the surface of the inner layer, and the transition section where the inner layer (1) and the outer layer (2) are integrally connected is a structure that can be contracted and rebounded, serving as the insertion end (3) extending into the nasal cavity. The port at the other end of the inner layer (1) is turned outwards and reversely sleeved to form a protective cover, serving as the protruding end (4).

2. The nasal cavity protection device for a transnasal endoscopic surgery channel according to claim 1, wherein, The described device is integrally woven from an elastic material. The elastic material is woven into a pipe shape with a constricted middle and flared ends. One end is turned over and reversely sleeved along the constricted middle to form a double-layer structure inside and outside. The constricted part constitutes the contractible and reboundable insertion end (3), and the other end is turned over and reversely sleeved on the port of the outer layer (2) to form a protective cover.

3. The nasal cavity protection device for a transnasal endoscopic surgery channel according to claim 2, wherein, The described elastic material includes nylon, polyester fiber or PET.

4. The nasal cavity protection device for a transnasal endoscopic surgical channel according to claim 2, wherein, The elastic material is woven into a grid-shaped pipe. The grid is diamond-shaped, and the side length of the diamond-shaped grid gradually increases from the constricted part to the flared section, so that the inner diameter of the pipe before turning over gradually increases from the constricted part to the flared part.

5. The nasal cavity protection device for a transnasal endoscopic surgery channel according to claim 4, characterized in that, The pipe before turning over includes a first section (11) serving as the inner layer, a second section (12) serving as the outer layer, a constricted section (13) between the first section (11) and the second section (12), a flared section (14) at the port of the first section (11). The second section (12) is turned over and reversely sleeved on the surface of the first section (11) to form the outer layer (2). The constricted section (13) is located at the turning-over position and forms the insertion end (3) after turning over. The flared section (14) forms the protective cover after turning over.

6. The nasal cavity protection device for a transnasal endoscopic surgery channel according to claim 5, wherein The side length L1 of the diamond-shaped grid in the constricted section (13) is 0.1 - 1 mm. The side length L2 of the diamond-shaped grid of the first section (11) gradually increases from the constricted section to the flared section, and L2 is 1 - 3 times of L1. The side length L3 of the diamond-shaped grid of the flared section (14) is 3 - 5 times of L3. The side length L4 of the diamond-shaped grid of the second section (12) gradually increases from the constricted section to the flared section, and L2 is 1 - 3 times of L1.

7. The nasal cavity protection device for a transnasal endoscopic surgery channel according to claim 5, characterized in that, After the constricted section (13) is turned over, the elastic material is in a fluffy insertion end (3) in its natural state under the action of the turning-over force. When in use, the fluffy insertion end (3) is compressed and inserted into the nasal cavity, and after the pressure is released, it unfolds along the inner wall of the nasal cavity under the action of the resilience force.

8. The nasal cavity protection device for a transnasal endoscopic surgery channel according to claim 1 or 5, characterized in that, The outermost diameter of the described insertion end (3) in its natural state is 10 - 30 mm.

9. The nasal cavity protection device for the transnasal endoscopic surgery channel according to claim 5, wherein, After the flared section (14) is turned over, it is reversely buckled at the port of the second section (12) and connected to it, serving as the protruding end (4).

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