Nasolacrimal duct expansion assembly and nasolacrimal duct expansion system

Abstract

The utility model discloses a nasolacrimal duct dilatation assembly and a nasolacrimal duct dilatation system.The nasolacrimal duct dilatation assembly comprises a sacculus body provided with a pressurizing cavity; the hard elastic piece is arranged on the balloon body, the hard elastic piece at least extends to the second end of the balloon body from the first end of the balloon body, the first end of the elastic piece is provided with a spherical part, and the spherical part is located at the first end of the balloon body; the catheter is arranged at the second end of the balloon body, the catheter is provided with a first communication port and a first channel, and the first channel is communicated with the pressurizing cavity and the first communication port.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a nasolacrimal duct dilation component and a nasolacrimal duct dilation system. Background Technology

[0002] In the treatment of nasolacrimal duct stenosis or obstruction, traditional nasolacrimal duct dilation balloons typically employ a rigid structure for support. However, this design is prone to jamming or colliding with the nasolacrimal duct wall during advancement, leading to tissue damage. Furthermore, uneven pressure distribution on the nasolacrimal duct wall during dilation can cause localized excessive compression, increasing the risk of tissue damage. In addition, the rigid structure cannot be flexibly adjusted to the shape of the nasolacrimal duct, making it difficult to adapt to complex anatomical structures and affecting surgical outcomes. Simultaneously, the lack of effective protective design at the tip of traditional nasolacrimal duct dilation instruments makes them susceptible to damage to surrounding tissues upon entry into the nasolacrimal duct, further reducing the safety and reliability of the procedure. Utility Model Content

[0003] The first objective of this invention is to provide a new technical solution for a nasolacrimal duct dilation component, which can at least solve the technical problem of poor safety in existing nasolacrimal duct dilation surgeries.

[0004] The second objective of this invention is to provide a new technical solution for a nasolacrimal duct dilation system.

[0005] According to a first aspect of the present invention, a nasolacrimal duct dilation assembly is provided, comprising:

[0006] A balloon body, wherein the balloon body is provided with an inflation chamber;

[0007] A rigid elastic element is disposed on the balloon body, the rigid elastic element extends at least from a first end of the balloon body to a second end of the balloon body, and the first end of the elastic element is provided with a spherical portion, the spherical portion being located at the first end of the balloon body;

[0008] The catheter is located at the second end of the balloon body. The catheter has a first connecting port and a first channel, and the first channel connects the inflation chamber and the first connecting port.

[0009] Optionally, the rigid elastic element is fixedly connected to the balloon body, and the second end of the rigid elastic element extends into the catheter.

[0010] Optionally, the balloon body has a through channel extending along its length, the catheter has a second connecting port and a second channel, the second channel connecting the through channel and the second connecting port, and the rigid elastic member is movably disposed in the through channel and the second channel along its length and extends out of the second channel from the second connecting port.

[0011] Optionally, the radial dimension of the spherical portion is larger than the radial dimension of the through channel near the end of the spherical portion.

[0012] Optionally, the pressurization chamber is located on the outer periphery of the through channel, the conduit includes a first tube layer and a second tube layer, the second tube layer is located inside the first tube layer, the first tube layer and the second tube layer define the first channel, and the inner wall surface of the second tube layer defines the second channel.

[0013] Alternatively, the rigid elastic element is configured as a guide wire or a spring.

[0014] Optionally, the balloon body includes a flexible guide segment, the first end of which is the first end of the balloon body, and the radial dimension of the flexible guide segment gradually decreases from its second end to its first end; and / or, the end of the balloon body away from the spherical portion is formed as an arc surface.

[0015] Optionally, the outer surface of the spherical portion is provided with a passivation layer; and / or, the outer side of the spherical portion is provided with a flexible protection.

[0016] Optionally, the spherical part is one of a multi-faceted spherical structure, a circular spherical structure, or an ellipsoidal spherical structure.

[0017] According to a second aspect of the present invention, a nasolacrimal duct dilation system is provided, comprising the nasolacrimal duct dilation component described in any of the preceding claims.

[0018] According to the nasolacrimal duct dilation assembly of this utility model, the rigid elastic element can provide elastic support for the balloon body, which helps the balloon body to enter the nasolacrimal duct smoothly and allows it to bend flexibly according to the shape of the nasolacrimal duct, thereby effectively avoiding damage to the nasolacrimal duct and its surrounding tissues and significantly improving the safety of the operation. In addition, the spherical part provided at the first end of the rigid elastic element can effectively prevent the instrument from getting stuck on the tissue surface, ensuring the smooth progress of the operation and further improving the safety of the operation.

[0019] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of a nasolacrimal duct dilation assembly according to an embodiment of the present invention;

[0022] Figure 2 This is a partial structural schematic diagram of a nasolacrimal duct dilation assembly according to an embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional view of a partial structure of a nasolacrimal duct dilation assembly according to an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of the conduit of a nasolacrimal duct dilation assembly according to an embodiment of the present invention;

[0025] Figure 5 This is a partial structural schematic diagram of the rigid elastic element of a nasolacrimal duct dilation assembly according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of a nasolacrimal duct dilation component and a part of the human body according to an embodiment of the present invention;

[0027] Figure 7 This is a structural schematic diagram of a pressurization device according to an embodiment of the present invention.

[0028] Figure label:

[0029] 100. Nasolacrimal duct dilation assembly;

[0030] 10. Balloon body; 11. Inflation chamber; 12. Flexible guide segment; 13. Main body segment;

[0031] 20. Rigid elastic component; 21. Spherical part; 21a. Flexible protective layer;

[0032] 30. Conduit; 30a. First tube layer; 30b. Second tube layer; 31. First channel; 32. First connecting port; 33. Second channel; 34. Second connecting port;

[0033] a. Nasolacrimal duct;

[0034] 200. Pressurization equipment; 210. Pressurization pipe; 211. Luer connector; 220. Pressure gauge. Detailed Implementation

[0035] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0037] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0038] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0040] The nasolacrimal duct dilation assembly 100 according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] like Figures 1 to 5 As shown, the nasolacrimal duct dilation assembly 100 according to an embodiment of the present invention includes: a balloon body 10, a rigid elastic element 20, and a conduit 30.

[0042] Specifically, the balloon body 10 is provided with a pressure chamber 11, the rigid elastic member 20 is provided on the balloon body 10, the rigid elastic member 20 extends at least from a first end of the balloon body 10 to a second end of the balloon body 10, the first end of the elastic member is provided with a spherical portion 21, the spherical portion 21 is located at the first end of the balloon body 10, the conduit 30 is provided at the second end of the balloon body 10, the conduit 30 is provided with a first connecting port 32 and a first channel 31, the first channel 31 connects the pressure chamber 11 and the first connecting port 32.

[0043] In other words, such as Figures 1 to 6 As shown, the nasolacrimal duct dilation assembly 100 according to an embodiment of the present invention mainly includes a balloon body 10, a rigid elastic element 20, and a conduit 30. The balloon body 10 can be made of a soft elastic material, such as silicone or rubber. The balloon body 10 has an elongated structure and an inflation chamber 11. The balloon body 10 has a first end (i.e., the front end) and a second end (i.e., the rear end) disposed opposite each other along its length. The first end of the conduit 30 is fixedly connected to the second end of the balloon body 10. The conduit 30 has a first connecting port 32 and a first channel 31. The first connecting port 32 is located at the second end of the conduit 30. The first end of the first channel 31 communicates with the inflation chamber 11, and the second end of the first channel 31 communicates with the first connecting port 32.

[0044] like Figures 1 to 3As shown, a rigid elastic element 20 is disposed on the balloon body 10, and its length is not less than the length of the balloon body 10, for example, the same as the length of the balloon body 10, so that the rigid elastic element 20 can be distributed in various parts of the balloon body 10 in the length direction, that is, extending at least from the first end to the second end of the balloon body 10, thereby providing elastic support for the entire balloon body 10. Furthermore, a spherical portion 21 is fixedly connected to the first end of the rigid elastic element 20, and the spherical portion 21 is located at the first end of the balloon body 10.

[0045] According to the embodiment of this utility model, the nasolacrimal duct dilation assembly 100 is used by connecting the first connecting port 32 to the inflation tube 210 of the inflation device 200. The balloon body 10 is inserted into the patient's nasal cavity and aligned with the opening of the nasolacrimal duct a. Then, the balloon body 10 is pushed into the nasolacrimal duct a. Finally, liquid or gas is injected through the inflation device 200 to inflate the balloon body 10, thereby dilating the nasolacrimal duct a. During the pushing process, the spherical part 21 at the first end of the balloon body 10 can effectively avoid getting stuck with the tissue surface. When the spherical part 21 contacts the tissue surface, it can slide smoothly away, thereby protecting the tissue from damage and ensuring the safety and efficiency of the surgical procedure. Furthermore, during the pushing process, the rigid elastic element 20 can provide elastic support for the balloon body 10, which helps the balloon body 10 to enter the nasolacrimal duct a smoothly. Moreover, it can flexibly bend according to the shape of the nasolacrimal duct a, which can effectively avoid damage to the nasolacrimal duct a and its surrounding tissues, ensuring the safety of the surgical procedure.

[0046] Therefore, the nasolacrimal duct dilation assembly 100 according to this embodiment of the present invention, through the rigid elastic element 20, can elastically support the balloon body 10, which helps the balloon body 10 to smoothly enter the nasolacrimal duct a, and allows it to flexibly bend according to the shape of the nasolacrimal duct a, thereby effectively avoiding damage to the nasolacrimal duct a and its surrounding tissues, and significantly improving the safety of the operation; in addition, the spherical part 21 provided at the first end of the rigid elastic element 20 can effectively prevent the instrument from getting stuck on the tissue surface, ensuring the smooth progress of the operation, and further improving the safety of the operation.

[0047] According to one embodiment of the present invention, the rigid elastic member 20 is fixedly connected to the balloon body 10, and the second end of the rigid elastic member 20 extends into the catheter 30.

[0048] Specifically, such as Figure 2 and Figure 3 As shown, the balloon body 10 has a through channel extending along its length direction. A rigid elastic member 20 is fixedly connected in the through channel. The length of the rigid elastic member 20 is greater than the length of the balloon body 10. Its first end is flush with or protrudes from the first end of the balloon body 10, and its second end extends into the catheter 30.

[0049] In this embodiment, the second end of the rigid elastic element 20 extends into the catheter 30, which not only ensures the structural stability of the nasolacrimal duct dilation assembly 100, but also enables the rigid elastic element 20 to provide uniform elastic support to the balloon body 10 at the end, thereby effectively avoiding the risk of tissue damage caused by excessive rigidity in the part of the balloon body 10 near the end, and thus effectively improving the safety of the operation.

[0050] In some specific embodiments of this utility model, the balloon body 10 is provided with a through channel extending along its length direction, the catheter 30 is provided with a second connecting port 34 and a second channel 33, the second channel 33 connects the through channel and the second connecting port 34, and the rigid elastic member 20 is movably disposed in the through channel and the second channel 33 along its length direction, and extends out of the second channel 33 from the second connecting port 34.

[0051] In other words, such as Figure 1 and Figure 3 As shown, the balloon body 10 has independent inflation chambers 11 and through channels, wherein the through channel extends along the length of the balloon body 10, and the inflation chambers 11 surround the outer periphery of the through channel. The catheter 30 has a second connecting port 34 and a second channel 33. The second connecting port 34 is located at the second end of the catheter 30, the first end of the second channel 33 is connected to one end of the through channel, and the second end of the second channel 33 is connected to the second connecting port 34. The second end of the rigid elastic member 20 passes through the through channel and the second channel 33, extends out of the second connecting port 34, and is located outside the catheter 30. The rigid elastic member 20 can move freely along the through channel and the second channel 33. When using the nasolacrimal duct dilation assembly 100, the rigid elastic member 20 can first be pushed into the nasolacrimal duct a. After the rigid elastic member 20 reaches the corresponding position, the catheter 30 is pushed, so that the balloon body 10 moves along the rigid elastic member 20 into the nasolacrimal duct a.

[0052] In this embodiment, the rigid elastic element 20 first enters the nasolacrimal duct a. Because the rigid elastic element 20 is smaller than the radial dimension of the balloon body 10, it encounters relatively less resistance when entering the nasolacrimal duct a, thus allowing it to reach the predetermined position more smoothly and be flexibly adjusted according to the anatomical shape of the nasolacrimal duct a during its advancement. Subsequently, guided by the rigid elastic element 20, the balloon body 10 is smoothly introduced into the nasolacrimal duct. This not only effectively improves the flexibility and controllability of the surgical procedure but also significantly reduces the resistance and potential risks that the balloon body 10 may encounter when directly entering the nasolacrimal duct a, thereby effectively ensuring the safety of the surgery.

[0053] According to one embodiment of the present invention, the radial dimension of the spherical portion 21 is greater than the radial dimension of the through channel near the end of the spherical portion 21.

[0054] In this embodiment, the spherical portion 21 is larger than the radial dimension of the rigid elastic member 20, and also larger than the radial dimension of the end of the through channel near the spherical portion 21. This allows the spherical portion 21 to effectively restrict the position of the balloon body 10, preventing it from sliding or shifting excessively during the push process, thereby ensuring that the balloon body 10 can remain stably in the predetermined position.

[0055] In some specific embodiments of this utility model, the pressurization chamber 11 is located on the outer periphery of the through channel, the conduit 30 includes a first tube layer 30a and a second tube layer 30b, the second tube layer 30b is located inside the first tube layer 30a, the first tube layer 30a and the second tube layer 30b define the first channel 31, and the inner wall surface of the second tube layer 30b defines the second channel 33.

[0056] like Figure 3 and Figure 4 As shown, the conduit 30 is configured as a concentric tube structure. Specifically, the conduit 30 mainly includes a first tube layer 30a and a second tube layer 30b. The second tube layer 30b is located inside the first tube layer 30a. A first channel 31 is defined between the inner wall surface of the first tube layer 30a and the outer peripheral surface of the second tube layer 30b. The first channel 31 connects the first connecting port 32 and the pressurization chamber 11 located on the outer periphery of the through channel. The inner wall surface of the second tube layer 30b defines a second channel 33, which connects the through channel and the second connecting port 34.

[0057] In this embodiment, the catheter 30 has a concentric tube structure, which is compact and significantly reduces the overall volume and outer diameter of the catheter 30, thus significantly improving the flexibility of surgical operations.

[0058] According to one embodiment of the present invention, the rigid elastic element 20 is configured as a guide wire or a spring.

[0059] When the rigid elastic element 20 is configured as a guidewire, its elongated structure allows it to easily enter the nasolacrimal duct a, providing a stable guiding path for the balloon body 10. The guidewire has a small radial dimension and a relatively small contact area with the tissue, thus minimizing irritation and damage to surrounding tissues upon entry into the nasolacrimal duct a.

[0060] When the rigid elastic element 20 is configured as a spring, its excellent elasticity provides stable elastic support for the balloon body 10 while ensuring that the balloon body 10 maintains good flexibility. The elastic properties of the spring allow it to flexibly adjust according to the anatomical structure of the nasolacrimal duct a during delivery, reducing pressure and damage to the tissue.

[0061] In some specific embodiments of this utility model, the balloon body 10 includes a flexible guide section 12, the first end of the flexible guide section 12 is the first end of the balloon body 10, and the radial dimension of the flexible guide section 12 gradually decreases from its second end to its first end; and / or, the end of the balloon body 10 away from the spherical portion 21 is formed as an arc surface.

[0062] In other words, such as Figure 2 As shown, the balloon body 10 mainly includes a flexible guiding segment 12 and a main body segment 13 distributed along its length. The flexible guiding segment 12 can be made of a soft, elastic material, specifically medical-grade silicone or rubber. The material of the main body segment 13 can be the same as that of the flexible guiding segment 12. The first end of the flexible guiding segment 12 forms the first end of the balloon body 10, and the second end of the flexible guiding segment 12 connects to the first end of the main body segment 13, forming the second end of the balloon body 10. The radial dimension of the second end of the flexible guiding segment 12 is the same as the radial dimension of the first end of the main body segment 13. The radial dimension of the flexible guiding segment 12 gradually decreases from the second end to the first end, making the flexible guiding segment 12 a conical structure. This facilitates the insertion of the balloon body 10 into the nasolacrimal duct a and effectively prevents the balloon body 10 from damaging tissue. Furthermore, the second end of the main body segment 13 is formed as an arc surface, which effectively avoids damage to surrounding tissues when the balloon body 10 is withdrawn, thereby ensuring the safety of the procedure.

[0063] According to one embodiment of the present invention, the outer surface of the spherical portion 21 is provided with a passivation layer; and / or, the outer side of the spherical portion 21 is provided with a flexible protective layer 21a.

[0064] Specifically, the outer surface of the spherical portion 21 can be passivated using laser passivation or heat treatment to form a passivation layer. This effectively prevents corrosion caused by direct contact between the spherical portion 21 and body fluids, while reducing irritation and damage to surrounding tissues. Furthermore, such as Figure 5 As shown, a flexible protective layer 21a, such as a medical silicone layer, can also be provided on the outer side of the spherical part 21 to further prevent the spherical part 21 from directly contacting body fluids, thereby better avoiding the occurrence of corrosion reactions, while minimizing the stimulation and damage to surrounding tissues, and significantly improving the stability and safety of the spherical part 21 in the surgical and postoperative environment.

[0065] In some specific embodiments of this utility model, the spherical part 21 is a multi-faceted spherical structure or a circular spherical structure.

[0066] In other words, the spherical portion 21 can be a multifaceted spherical structure. When it touches the interior of the nasolacrimal duct a tissue, the shape of the multifaceted spherical structure can effectively change the direction of the forward thrust of the balloon body 10, preventing the balloon body 10 from getting stuck or bent during the push-out process, and also preventing perforation damage to the nasolacrimal duct a. In addition, the spherical portion 21 can also be a spherical structure. The spherical structure has a smooth surface, which can significantly reduce the risk of irritation and damage to surrounding tissues, while providing stable guiding performance, ensuring the smoothness and safety of the surgical operation.

[0067] In summary, the nasolacrimal duct dilation assembly 100 according to this embodiment of the present invention, through the provision of the rigid elastic element 20, can elastically support the balloon body 10, which helps the balloon body 10 to smoothly enter the nasolacrimal duct a, and allows it to flexibly bend according to the shape of the nasolacrimal duct a, thereby effectively avoiding damage to the nasolacrimal duct a and its surrounding tissues, and significantly improving the safety of the operation; in addition, the spherical part 21 provided at the first end of the rigid elastic element 20 can effectively prevent the instrument from getting stuck on the tissue surface, ensuring the smooth progress of the operation, and further improving the safety of the operation.

[0068] An embodiment of this utility model also provides a nasolacrimal duct dilation system, including the nasolacrimal duct dilation component 100 described in any of the above embodiments. Since the nasolacrimal duct dilation component 100 according to the embodiments of this utility model has the above-mentioned technical effects, the nasolacrimal duct dilation system according to the embodiments of this utility model also has corresponding technical effects, which will not be repeated in this embodiment.

[0069] Specifically, such as Figure 7 As shown, the nasolacrimal duct dilation system also includes an inflator 200. One end of the inflator tube 210 of the inflator 200 is equipped with a Luer connector 211. During use, the Luer connector 211 is connected to the first connecting port 32 to inflate the inflator chamber 11. The inflator 200 is also equipped with a pressure gauge 220, which monitors the pressure value in real time during the inflator process to ensure that the inflator pressure is within a safe range, thereby effectively avoiding tissue damage or balloon rupture caused by excessive pressure.

[0070] It should be noted that the pressurizing device 200 can be a manual pressurizing device 200 or an automatic pressurizing device 200. The specific choice can be determined according to actual needs, and will not be elaborated in this embodiment.

[0071] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A nasolacrimal duct dilation assembly, characterized in that, include: The balloon body (10) is provided with a pressure chamber (11); A rigid elastic element (20) is disposed on the balloon body (10). The rigid elastic element (20) extends at least from a first end of the balloon body (10) to a second end of the balloon body (10). The first end of the elastic element is provided with a spherical portion (21), which is located at the first end of the balloon body (10). The catheter (30) is located at the second end of the balloon body (10). The catheter (30) has a first connecting port (32) and a first channel (31). The first channel (31) connects the inflation chamber (11) and the first connecting port (32).

2. The nasolacrimal duct dilation assembly according to claim 1, characterized in that, The rigid elastic element (20) is fixedly connected to the balloon body (10), and the second end of the rigid elastic element (20) extends into the catheter (30).

3. The nasolacrimal duct dilation assembly according to claim 1, characterized in that, The balloon body (10) is provided with a through channel extending along its length direction. The catheter (30) is provided with a second connecting port (34) and a second channel (33). The second channel (33) connects the through channel and the second connecting port (34). The rigid elastic member (20) is movably disposed in the through channel and the second channel (33) along its length direction and extends out of the second channel (33) from the second connecting port (34).

4. The nasolacrimal duct dilation assembly according to claim 3, characterized in that, The radial dimension of the spherical portion (21) is greater than the radial dimension of the through channel near the end of the spherical portion (21).

5. The nasolacrimal duct dilation assembly according to claim 3, characterized in that, The pressurization chamber (11) is located on the outer periphery of the through channel. The conduit (30) includes a first tube layer (30a) and a second tube layer (30b). The second tube layer (30b) is located inside the first tube layer (30a). The first channel (31) is defined between the first tube layer (30a) and the second tube layer (30b). The inner wall surface of the second tube layer (30b) defines the second channel (33).

6. The nasolacrimal duct dilation assembly according to claim 1, characterized in that, The rigid elastic element (20) is configured as a guide wire or a spring.

7. The nasolacrimal duct dilation assembly according to claim 1, characterized in that, The balloon body (10) includes a flexible guide segment (12), the first end of which is the first end of the balloon body (10), and the radial dimension of the flexible guide segment (12) gradually decreases from its second end to its first end; and / or, the end of the balloon body (10) away from the spherical portion (21) is formed as an arc surface.

8. The nasolacrimal duct dilation assembly according to claim 1, characterized in that, The outer surface of the spherical portion (21) is provided with a passivation layer; and / or, the outer side of the spherical portion (21) is provided with a flexible protective layer (21a).

9. The nasolacrimal duct dilation assembly according to claim 1, characterized in that, The spherical part (21) is one of a multi-faceted spherical structure, a circular spherical structure, or an ellipsoidal spherical structure.

10. A nasolacrimal duct dilation system, characterized in that, The nasolacrimal duct dilation assembly includes any one of claims 1 to 9.

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