Nasolacrimal duct expansion assembly and nasolacrimal duct expansion system

Abstract

The invention discloses a nasolacrimal duct dilation assembly and a nasolacrimal duct dilation system.The nasolacrimal duct dilation assembly comprises a balloon 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] The present invention belongs to the technical field of medical devices, and in particular relates to a nasolacrimal duct dilation component and a nasolacrimal duct dilation system. Background Art

[0002] In the treatment of nasolacrimal duct stenosis or obstruction, traditional nasolacrimal duct dilation balloons are usually supported by a rigid structure. However, this design is prone to getting stuck or colliding with the nasolacrimal duct wall during the pushing process, causing tissue damage. The pressure distribution on the nasolacrimal duct wall during expansion is uneven, which may cause local excessive compression and increase the risk of tissue damage. In addition, the rigid structure cannot be flexibly adjusted according to the shape of the nasolacrimal duct, making it difficult to adapt to complex anatomical structures, affecting the surgical effect. At the same time, the front end of the traditional nasolacrimal duct dilation instrument lacks an effective protection design, which can easily cause damage to surrounding tissues when entering the nasolacrimal duct, further reducing the safety and reliability of the operation. Summary of the Invention

[0003] The first purpose of the present invention is to provide a new technical solution for a nasolacrimal duct dilation assembly, which can at least solve the technical problem of poor safety of existing nasolacrimal duct dilation surgery.

[0004] A second object of the present invention is to provide a new technical solution for the nasolacrimal duct dilation system.

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

[0006] A balloon body, wherein the balloon body is provided with a pressure-filled cavity;

[0007] a hard elastic member, the hard elastic member being provided on the balloon body, the hard elastic member extending at least from the first end of the balloon body to the second end of the balloon body, the first end of the elastic member being provided with a spherical portion, the spherical portion being located at the first end of the balloon body;

[0008] The catheter is arranged at the second end of the balloon body, and the catheter is provided with a first communication port and a first channel, wherein the first channel communicates with the inflation chamber and the first communication port.

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

[0010] Optionally, the balloon body is provided with a through channel extending along its length, the catheter is provided with a second connecting port and a second channel, the second channel connects the through channel and the second connecting port, and the hard elastic part is movably provided in the through channel and the second channel along its length, and extends the second channel from the second connecting port.

[0011] Optionally, a radial dimension of the spherical portion is larger than a radial dimension of an end of the through channel close to the spherical portion.

[0012] Optionally, the inflation chamber is located at the periphery of the through channel, the catheter includes a first tube body layer and a second tube body layer, the second tube body layer is located within the first tube body layer, the first channel is defined between the first tube body layer and the second tube body layer, and the inner wall surface of the second tube body layer defines the second channel.

[0013] Optionally, the hard elastic member is configured as a guide wire or a spring.

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

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

[0016] Optionally, the spherical portion is one of a polyhedral spherical structure, a spherical structure, and an ellipsoidal spherical structure.

[0017] According to a second aspect of the present invention, a nasolacrimal duct dilation system is provided, comprising any one of the above-mentioned nasolacrimal duct dilation components.

[0018] According to the nasolacrimal duct dilation component of the present invention, the hard elastic part is provided to elastically support the balloon body, which helps the balloon body to smoothly enter the nasolacrimal duct and enables it to flexibly bend according to the shape of the nasolacrimal duct, thereby effectively avoiding damage to the nasolacrimal duct and surrounding tissues, and significantly improving the safety of the operation; in addition, the spherical portion provided at the first end of the hard elastic part can effectively prevent the instrument from getting stuck with the tissue surface, ensuring the smooth progress of the operation and further improving the safety of the operation.

[0019] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 1 2. It is a schematic structural diagram of a nasolacrimal duct dilation assembly according to an embodiment of the present invention;

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

[0023] Figure 3 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 is a cross-sectional view of a catheter of a nasolacrimal duct dilation assembly according to one embodiment of the present invention;

[0025] Figure 5 1 is a partial structural diagram of a hard elastic member of a nasolacrimal duct dilation assembly according to an embodiment of the present invention;

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

[0027] Figure 7 Schematic diagram of the structure of a charging device according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 100. Nasolacrimal duct dilation component;

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

[0031] 20. Hard elastic member; 21. Spherical portion; 21a. Flexible protective layer;

[0032] 30, catheter; 30a, first tubular layer; 30b, second tubular layer; 31, first channel; 32, first communication port; 33, second channel; 34, second communication port;

[0033] a. Nasolacrimal duct;

[0034] 200. Charging equipment; 210. Charging tube; 211. Luer connector; 220. Pressure gauge. DETAILED DESCRIPTION

[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 of components and steps, numerical expressions and numerical values 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 in nature and is in no way intended to limit the invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

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

[0039] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] The nasolacrimal duct dilation assembly 100 according to an embodiment of the present invention will be described in detail below 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 hard elastic member 20 and a catheter 30 .

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

[0043] In other words, if 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 hard elastic member 20 and a catheter 30. The balloon body 10 can be made of a soft elastic material, such as silicone or rubber. The balloon body 10 is an elongated structure and is provided with a pressure chamber 11. The balloon body 10 has a first end (i.e., a front end) and a second end (i.e., a rear end) that are relatively arranged in its length direction. The first end of the catheter 30 is fixedly connected to the second end of the balloon body 10. The catheter 30 is provided with a first communication port 32 and a first channel 31. The first communication port 32 is located at the second end of the catheter 30. The first end of the first channel 31 is connected to the pressure chamber 11, and the second end of the first channel 31 is connected to the first communication port 32.

[0044] like Figures 1 to 3As shown, the hard elastic member 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 hard elastic member 20 can be distributed in various portions of the balloon body 10 in the longitudinal 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. In addition, the first end of the hard elastic member 20 is fixedly connected to a spherical portion 21, which is located at the first end of the balloon body 10.

[0045] During use, the nasolacrimal duct dilation assembly 100 according to an embodiment of the present invention connects the first communication 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. The balloon body 10 is then 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 portion 21 at the first end of the balloon body 10 effectively prevents it from getting stuck with the tissue surface. When the spherical portion 21 contacts the tissue surface, it slides away smoothly, protecting the tissue from damage and ensuring the safety and efficiency of the surgical procedure. Furthermore, during the pushing process, the rigid elastic member 20 provides elastic support for the balloon body 10, facilitating smooth entry of the balloon body 10 into the nasolacrimal duct a. Furthermore, the rigid elastic member 20 can flexibly adapt to the shape of the nasolacrimal duct a, effectively preventing damage to the nasolacrimal duct a and surrounding tissue, ensuring the safety of the surgical procedure.

[0046] Therefore, the nasolacrimal duct dilation assembly 100 according to an embodiment of the present invention can elastically support the balloon body 10 through the hard elastic member 20, which helps the balloon body 10 to smoothly enter the nasolacrimal duct a, and enables 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 portion 21 provided at the first end of the hard elastic member 20 can effectively prevent the instrument from getting stuck with the tissue surface, ensure the smooth progress of the operation, and further improve the safety of the operation.

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

[0048] Specifically, if Figure 2 and Figure 3 As shown, the balloon body 10 is provided with a through channel extending along its length direction, and the hard elastic member 20 is fixedly connected in the through channel. The length of the hard elastic member 20 is greater than the length of the balloon body 10, and its first end is flush with the first end of the balloon body 10, 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 hard elastic member 20 extends into the catheter 30, which not only ensures the structural stability of the nasolacrimal duct dilation assembly 100, but also enables the hard elastic member 20 to provide uniform elastic support force for the balloon body 10 at the end, thereby effectively avoiding the risk of tissue damage caused by excessive rigidity of the part near the end of the balloon body 10, thereby effectively improving the safety of the operation.

[0050] In some specific embodiments of the present invention, 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 hard elastic member 20 is movably provided in the through channel and the second channel 33 along its length direction, and the second channel 33 extends from the second connecting port 34.

[0051] That is to say, if Figure 1 and Figure 3 As shown, the balloon body 10 is provided with a mutually independent inflation chamber 11 and a through-channel, wherein the through-channel extends along the length of the balloon body 10, and the inflation chamber 11 surrounds the outer circumference of the through-channel. The catheter 30 is provided with a second communication port 34 and a second channel 33. The second communication 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 communication port 34. The second end of the hard elastic member 20 passes through the through-channel and the second channel 33, extending from the second communication port 34 to the outside of the catheter 30, and the hard elastic member 20 is freely movable along the through-channel and the second channel 33. When using the nasolacrimal duct dilator assembly 100, the hard elastic member 20 can first be pushed toward the nasolacrimal duct a. When the hard elastic member 20 reaches the corresponding position, the catheter 30 is pushed, so that the balloon body 10 moves along the hard elastic member 20 to the nasolacrimal duct a.

[0052] In this embodiment, the hard elastic member 20 first enters the nasolacrimal duct a. Because the hard elastic member 20 is smaller than the radial dimension of the balloon body 10, it encounters relatively little resistance upon entering the nasolacrimal duct a, allowing it to more smoothly reach the desired position and flexibly adjust according to the anatomical morphology of the nasolacrimal duct a during the advancement process. Subsequently, guided by the hard elastic member 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 may be encountered when the balloon body 10 directly enters the nasolacrimal duct a, thereby effectively ensuring the safety of the procedure.

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

[0054] In this embodiment, the spherical portion 21 is larger than the radial dimension of the hard elastic part 20, and is also larger than the radial dimension of one end of the through channel close to the spherical portion 21, so that the spherical portion 21 can effectively limit the position of the balloon body 10, preventing it from excessive sliding or displacement during the pushing process, thereby ensuring that the balloon body 10 can stay stably in the predetermined position.

[0055] In some specific embodiments of the present invention, the pressure chamber 11 is located at the periphery of the through channel, and the catheter 30 includes a first tube body layer 30a and a second tube body layer 30b, the second tube body layer 30b is located within the first tube body layer 30a, the first tube body layer 30a and the second tube body layer 30b define the first channel 31, and the inner wall surface of the second tube body layer 30b defines the second channel 33.

[0056] like Figure 3 and Figure 4 As shown, the catheter 30 is configured as a concentric tube structure. Specifically, the catheter 30 mainly includes a first tube layer 30a and a second tube layer 30b. The second tube layer 30b is located within the first tube layer 30a. The inner wall surface of the first tube layer 30a and the outer peripheral surface of the second tube layer 30b define a first channel 31, which connects the first communication port 32 with the pressure chamber 11 located on the 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 with the second communication port 34.

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

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

[0059] When the hard elastic member 20 is configured as a guidewire, its slender structure can easily enter the nasolacrimal duct a, providing a stable guide path for the balloon body 10. The guidewire has a small radial dimension and a relatively small contact area with the tissue, so it causes less irritation and damage to the surrounding tissue when entering the nasolacrimal duct a.

[0060] When the hard elastic member 20 is configured as a spring, its excellent elasticity can provide stable elastic support for the balloon body 10 while ensuring that the balloon body 10 maintains good flexibility. The elastic properties of the spring enable it to flexibly adjust to the anatomical structure of the nasolacrimal duct a during the pushing process, reducing pressure and damage to the tissue.

[0061] In some specific embodiments of the present invention, the balloon body 10 includes a flexible guide segment 12, the first end of the flexible guide segment 12 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 the first end; and / or, the end of the balloon body 10 away from the spherical part 21 is formed into an arc surface.

[0062] That is to say, if Figure 2 As shown, the balloon body 10 primarily comprises a flexible guide segment 12 and a main body segment 13, which are arranged along its length. The flexible guide segment 12 can be made of a soft elastic material, specifically medical silicone or rubber, while the main body segment 13 can be made of the same material as the flexible guide segment 12. The first end of the flexible guide segment 12 forms the first end of the balloon body 10, while the second end of the flexible guide segment 12 is connected to the first end of the main body segment 13, with the second 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 guide segment 12 is the same as the radial dimension of the first end of the main body segment 13, and the radial dimension of the flexible guide segment 12 gradually decreases from the second end to the first end, forming a tapered structure for the flexible guide segment 12. This facilitates 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 into a circular arc surface, effectively preventing damage to surrounding tissue during withdrawal of the balloon body 10, thereby ensuring surgical safety.

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

[0064] Specifically, the outer surface of the spherical portion 21 can be passivated by laser or heat treatment to form a passivation layer, thereby effectively avoiding the corrosion reaction caused by direct contact between the spherical portion 21 and body fluids, while reducing the stimulation and damage to the surrounding tissues. Figure 5 As shown, a flexible protective layer 21a, such as a medical silicone layer, can also be provided on the outside of the spherical portion 21 to further prevent the spherical portion 21 from direct contact with 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 portion 21 in surgical and postoperative environments.

[0065] In some specific embodiments of the present invention, the spherical portion 21 is a multi-faceted spherical structure or a round spherical structure.

[0066] In other words, the bulbous portion 21 can be a multifaceted spherical structure. When it contacts the interior of the nasolacrimal duct A, the multifaceted spherical shape can effectively change the direction of the forward propulsion force of the balloon body 10, preventing the balloon body 10 from getting stuck or buckling during the pushing process, and preventing perforation and damage to the nasolacrimal duct A. Furthermore, the bulbous 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 smooth guidance performance, ensuring smooth and safe surgical operations.

[0067] In summary, the nasolacrimal duct dilation assembly 100 according to an embodiment of the present invention can elastically support the balloon body 10 through the hard elastic part 20, which helps the balloon body 10 to smoothly enter the nasolacrimal duct a, and enables 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, significantly improving the safety of the operation; in addition, the spherical portion 21 set at the first end of the hard elastic part 20 can effectively prevent the instrument from getting stuck with the tissue surface, ensuring the smooth progress of the operation, and further improving the safety of the operation.

[0068] Embodiments of the present invention further provide a nasolacrimal duct dilation system, comprising the nasolacrimal duct dilation assembly 100 described in any of the aforementioned embodiments. Since the nasolacrimal duct dilation assembly 100 according to embodiments of the present invention has the aforementioned technical effects, the nasolacrimal duct dilation system according to embodiments of the present invention also has corresponding technical effects, which will not be further described in this embodiment.

[0069] Specifically, if Figure 7 As shown, the nasolacrimal duct dilation system also includes a charging device 200. A Luer connector 211 is provided at one end of a charging tube 210 of the charging device 200. During use, the Luer connector 211 is connected to the first communication port 32 to pressurize the charging chamber 11. The charging device 200 is also equipped with a pressure gauge 220, which monitors the pressure during the charging process in real time to ensure that the charging pressure is within a safe range, thereby effectively preventing tissue damage or balloon rupture caused by excessive pressure.

[0070] It should be noted that the charging device 200 can be a manual charging device 200 or an automatic charging device 200. The specific selection can be determined according to actual needs and will not be described in detail in this embodiment.

[0071] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may 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 dilator assembly, characterized in that: include: A balloon body (10), wherein the balloon body (10) is provided with a pressure-filling chamber (11); a hard elastic member (20), the hard elastic member (20) being provided on the balloon body (10), the hard elastic member (20) extending at least from the first end of the balloon body (10) to the second end of the balloon body (10), the first end of the elastic member being provided with a spherical portion (21), the spherical portion (21) being located at the first end of the balloon body (10); A catheter (30) is provided at the second end of the balloon body (10), and the catheter (30) is provided with a first communication port (32) and a first channel (31), wherein the first channel (31) communicates with the inflation chamber (11) and the first communication port (32).

2. The nasolacrimal duct dilation assembly according to claim 1, characterized in that: The hard elastic member (20) is fixedly connected to the balloon body (10), and the second end of the hard elastic member (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 communication port (34) and a second channel (33), the second channel (33) is connected to the through channel and the second communication port (34), and the hard elastic member (20) is movably provided in the through channel and the second channel (33) along its length direction, and the second channel (33) extends from the second communication port (34).

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

5. The nasolacrimal duct dilation assembly according to claim 3, characterized in that: The pressure chamber (11) is located at the periphery of the through-channel, and the catheter (30) comprises a first tube body layer (30a) and a second tube body layer (30b), wherein the second tube body layer (30b) is located within the first tube body layer (30a), the first channel (31) is defined between the first tube body layer (30a) and the second tube body layer (30b), and the inner wall surface of the second tube body layer (30b) defines the second channel (33).

6. The nasolacrimal duct dilation assembly according to claim 1, characterized in that: The hard elastic member (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 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 the first end; and / or, the end of the balloon body (10) away from the spherical portion (21) is formed into an arc surface.

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

9. The nasolacrimal duct dilator assembly according to claim 1, wherein: The spherical portion (21) is one of a polyhedral spherical structure, a spherical structure, and an ellipsoidal spherical structure.

10. A nasolacrimal duct dilation system, characterized in that: The invention comprises the nasolacrimal duct dilation assembly according to any one of claims 1 to 9.

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