Lacrimal duct prosthesis placement aid for lacrimal punctum stenosis

Abstract

This invention provides an auxiliary device for lacrimal duct prosthesis placement in cases of lacrimal punctum stenosis. The device includes a guide tube and a tapered guide head located at the lower end of the guide tube. The guide tube comprises a left half and a right half disposed opposite each other, with an elastic clamping portion connected above the left and right half tubes. The left and right half tubes are openable and closeable via the elastic clamping portion. An arc-shaped left groove and a right groove are formed along the length direction on opposite sides of the left and right half tubes, respectively. The left and right grooves can be joined to form a receiving cavity. The tapered guide head includes a left guide head and a right guide head connected to the lower ends of the left and right half tubes, respectively. The left and right guide heads can be closed and connected. Compared to existing lacrimal duct prosthesis implantation aids, this invention's lacrimal duct prosthesis placement auxiliary device is simple to operate and allows for gentle, stepwise expansion, effectively reducing damage to ocular tissues.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an auxiliary device for the placement of a lacrimal duct prosthesis for lacrimal punctum stenosis. Background Technology

[0002] For patients with lacrimal punctum stenosis, lacrimal punctum dilators are often used multiple times and dilation is required during lacrimal duct prosthesis placement. This is not only cumbersome, but also prone to causing lacrimal punctum tearing, tissue edema, and even scarring, affecting the effectiveness of the prosthesis placement. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a simple, easy-to-use, and non-damaging lacrimal duct prosthesis insertion auxiliary device for lacrimal punctum stenosis.

[0004] The present invention achieves the above objectives as follows: A lacrimal duct prosthesis insertion auxiliary device for lacrimal punctum stenosis is provided, comprising a guide tube and a tapered guide head located at the lower end of the guide tube. The guide tube includes a left half tube and a right half tube arranged opposite each other, with an elastic clamping part connected above the left half tube and the right half tube. The left half tube and the right half tube are foldable and connectable through the elastic clamping part. An arc-shaped left groove and a right groove are formed on opposite sides of the left half tube and the right half tube along the length direction, respectively. The left groove and the right groove can be joined to form a receiving cavity. The tapered guide head includes a left guide head and a right guide head respectively connected to the lower ends of the left half tube and the right half tube. The left guide head and the right guide head are foldable and connectable.

[0005] Furthermore, the left half-tube, the right half-tube, the left guide head, and the right guide head are all elastic thin-walled structures, and the outer surfaces of the tapered guide head and the guide tube are smooth.

[0006] Furthermore, the left and right halves of the tube can be in surface or line contact with the lacrimal duct prosthesis via the elastic clamping part.

[0007] Furthermore, the left guide head and the right guide head have a vertically connected left half groove and a right half groove on opposite sides. When the left guide head and the right guide head are closed, the left half groove and the right half groove are closed to form a flushing pipe. The flushing pipe is connected to the inside of the guide tube to connect to the receiving cavity or the lacrimal duct prosthesis.

[0008] Furthermore, the elastic clamping part is a U-shaped elastic clamp handle, with both ends of the elastic clamp handle connected to the upper ends of the left half tube and the right half tube, respectively.

[0009] Furthermore, the two ends of the elastic handle are semi-frustum-shaped and have reinforcing cavities. The outer diameter of the two ends of the elastic handle remains unchanged, while the inner diameter gradually decreases from the head end of the reinforcing cavity to the tail end of the reinforcing cavity.

[0010] Furthermore, a depth scale is also provided on the left half tube and / or the right half tube.

[0011] Furthermore, the outer walls of the left half-tube, right half-tube, and / or conical guide head are distributed with smooth protrusions.

[0012] Furthermore, a long groove is left in front of the guide tube, which is formed by the notch left between the front sides of the left and right halves of the tube.

[0013] The beneficial effects of this invention are as follows: This invention provides an auxiliary device for inserting a lacrimal duct prosthesis for punctal stenosis. It uses an elastic clamping part to connect the left and right halves of the prosthesis, allowing them to open and close. Left and right grooves, which can be joined together to form a receiving cavity, are provided on opposite sides of the left and right halves. A left guide head and a right guide head are connected to the lower ends of the left and right halves, respectively. During surgery, the elastic clamping part is operated to close the left and right guide heads, forming a conical guide head. The lacrimal duct prosthesis is then inserted into the receiving cavity. Because the conical guide head has a gradient contour, it can gently open and expand the narrowed lacrimal punctum. The conical guide head gently extends into the lacrimal punctum through its contour to gradually open the narrowed punctum. Once the implant has reached the required depth, the elastic clamping part can be operated to release the lacrimal duct prosthesis. After the lacrimal duct prosthesis is fixed, the insertion auxiliary device is removed. Alternatively, a different approach can be used first. The lacrimal punctum is opened and expanded using a tapered guide head. If necessary, the elastic clamping part can be operated to separate the left and right guide heads, thereby further expanding the lacrimal punctum. After the implanter is inserted into the lacrimal punctum to the required depth, the elastic clamping part is operated to open the left and right halves of the tube, and the lacrimal duct prosthesis is inserted between the left and right grooves. The left and right grooves are then used to clamp the lacrimal duct prosthesis. If necessary, a portion of the lacrimal duct prosthesis can be inserted first, then the lacrimal duct prosthesis can be clamped, and the insertion-clamping steps can be repeated until the lacrimal duct prosthesis is located at the corresponding treatment site. Afterward, the lacrimal duct prosthesis can be fixed by other components, while the elastic clamping part is operated to completely release the lacrimal duct prosthesis. Then, the insertion auxiliary device is removed. Thus, lacrimal punctum dilation and lacrimal duct prosthesis implantation are completed. Compared with previous lacrimal punctum dilators, the lacrimal duct prosthesis insertion auxiliary device of this application can be inserted into the lacrimal punctum to perform stepwise dilation without repeated insertion and adjustment, thus avoiding damage to ocular tissue. Attached Figure Description

[0014] To make the technical problem to be solved by the present invention, the technical means adopted, and the beneficial effects clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the closed state of a lacrimal duct prosthesis insertion auxiliary device for lacrimal punctum stenosis in one embodiment of the present invention; Figure 2 for Figure 1 Enlarged diagram of A in the middle; Figure 3 This is a schematic diagram of the open state of an auxiliary device for lacrimal duct prosthesis placement for lacrimal punctum stenosis in one embodiment of the present invention. Figure 4 These are schematic diagrams of two internal structures of the conical guide head in this invention. Figure 5 for Figure 3 Enlarged diagram of B in the diagram; Figure 6 for Figure 3 Enlarged diagram of C in the middle; Figure 7 This is a schematic diagram of the inner structure of an auxiliary device for lacrimal duct prosthesis placement for lacrimal punctum stenosis in one embodiment of the present invention; Figure 8 This is a partial schematic diagram of another embodiment of the guide tube and tapered guide head.

[0015] In the diagram, 1 is the guide tube, 2 is the receiving cavity, 3 is the elastic clamping part, 4 is the conical guide head, 11 is the left half tube, 12 is the right half tube, 111 is the left groove, 121 is the right groove, 13 is the long groove, 14 is the scale marking ruler, 41 is the left guide head, 42 is the right guide head, 411 is the left half groove, 421 is the right half groove, 31 is the reinforcing cavity, 5 is the flushing pipe, and 6 is the protrusion. Detailed Implementation

[0016] Figures 1-8 The present invention illustrates the specific structure of an auxiliary device for lacrimal duct prosthesis placement for lacrimal punctum stenosis, comprising a guide tube 1 and a tapered guide head 4 located at the lower end of the guide tube 1. The guide tube 1 includes a left half tube 11 and a right half tube 12 arranged opposite to each other. An elastic clamping part 3 is connected above the left half tube 11 and the right half tube 12. The left half tube 11 and the right half tube 12 can be opened and closed connected through the elastic clamping part 3. An arc-shaped left groove 111 and a right groove 121 are formed on opposite sides of the left half tube 11 and the right half tube 12 along the length direction, respectively. The left groove 111 and the right groove 121 can be joined to form a receiving cavity 2. The tapered guide head 4 includes a left guide head 41 and a right guide head 42 respectively connected to the lower ends of the left half tube 11 and the right half tube 12. The left guide head 41 and the right guide head 42 can be closed and connected.

[0017] This invention provides an auxiliary device for inserting a lacrimal duct prosthesis for punctal stenosis. By using an elastic clamping part 3 to connect the left half-tube 11 and the right half-tube 12, the left half-tube 11 and the right half-tube 12 can be controllably opened and closed. The elastic clamping part 3 can be made of a long strip of hard rubber, heat-bent into an arc shape. Due to its certain length, it has a certain elasticity when pressed, and is naturally open when not under force, allowing it to elastically close when held with one hand. On opposite sides of the left half-tube 11 and the right half-tube 12, there are left grooves 111 and 121 that can be joined together to form a receiving cavity 2. The inner diameter of this receiving cavity 2 can be adapted to the outer diameter of a commonly used lacrimal duct prosthesis, specifically slightly larger than the outer diameter of the lacrimal duct prosthesis, to facilitate easy insertion and removal of the prosthesis. A left guide head 41 and a right guide head 42 are respectively connected to the lower ends of the left half-tube 11 and the right half-tube 12. During surgery, manipulating the elastic clamping part 3 allows the left guide head 41 and the right guide head 42 to close, forming a conical guide head 4. Because the conical guide head 4 has a gradient contour, it can gently open and expand the narrow lacrimal punctum. The contour of the conical guide head 4 gently extends into the lacrimal punctum to gradually widen the narrow punctum, driving the guide tube 1 into the lacrimal duct to the required depth. Since this auxiliary device consists of two sets of openable and closable structures, in specific surgeries, the auxiliary device can be used to clamp the lacrimal duct prosthesis for insertion, or the auxiliary device can be inserted first, followed by the lacrimal duct prosthesis. When the auxiliary device needs to be removed after insertion, the elastic clamping part 3 can be appropriately loosened. Its elasticity allows the guide tube 1 and the conical guide head 4 to separate and detach from the outer wall of the lacrimal duct prosthesis, making the auxiliary device easy to remove. Specifically, the conical guide head 4 can be used to open and expand the lacrimal punctum first. If necessary, the elastic clamping part 3 can be operated to separate the left guide head 41 and the right guide head 42 to further expand the lacrimal punctum. After the auxiliary device enters the lacrimal duct to the required depth, the elastic clamping part 3 is operated to open the left half tube 11 and the right half tube 12, and the lacrimal duct prosthesis is inserted between the left groove 111 and the right groove 121, and the left groove 111 and the right groove 121 cooperate to clamp the lacrimal duct prosthesis. Alternatively, a portion of the lacrimal duct prosthesis can be inserted first, then the prosthesis can be clamped, and the insertion-clamping steps can be repeated until the prosthesis is located at the corresponding treatment site. After that, the prosthesis can be fixed by other components, while the elastic clamping part 3 can be operated to completely release the prosthesis. Then, the insertion auxiliary device can be removed, thereby completing the punctal dilation and lacrimal duct prosthesis implantation. Compared with previous punctal dilators, the lacrimal duct prosthesis insertion auxiliary device of this application can be inserted into the punctum to perform stepwise dilation without repeated insertion and adjustment, thus avoiding damage to ocular tissue.

[0018] Furthermore, in this embodiment, as Figure 1 and Figures 3-6As shown, the left half-tube 11, the right half-tube 12, the left guide head 41, and the right guide head 42 are all elastic thin-walled structures, and the outer surfaces of the conical guide head 4 and the guide tube 1 are smooth.

[0019] Furthermore, in this embodiment, the left half-tube 11 and the right half-tube 12 can be surface-contact or line-contact with the lacrimal duct prosthesis via the elastic clamping part 3. Specifically, to accommodate lacrimal duct prostheses of different sizes and to stably clamp them, the elastic clamping part 3 can be operated according to the outer diameter of the lacrimal duct prosthesis to control the degree of splicing of the left half-tube 11 and the right half-tube 12. If the inner diameter of the accommodating cavity 2 formed after the left half-tube 11 and the right half-tube 12 are fully spliced ​​matches the outer diameter of the lacrimal duct prosthesis, then the elastic clamping part 3 can be operated. The elastic clamping part 3 completely assembles the left half tube 11 and the right half tube 12, thereby making the surface of the receiving cavity 2 completely fit with the outer wall of the lacrimal duct prosthesis, thus clamping and fixing the lacrimal duct prosthesis. If the outer diameter of the lacrimal duct prosthesis is larger than the inner diameter of the receiving cavity 2, the elastic clamping part 3 can be operated to separate the left half tube 11 and the right half tube 12 by a certain distance, so that the two sides of the left groove 111 of the left half tube 11 and the two sides of the right groove 121 of the right half tube 12 contact the lacrimal duct prosthesis line, thereby applying pressure to the lacrimal duct prosthesis, thereby achieving clamping and fixing of the lacrimal duct prosthesis.

[0020] Furthermore, in this embodiment, as Figures 2-4 As shown, the left guide head 41 and the right guide head 42 have vertically connected left and right half-grooves 411 and 421 on opposite sides. When the left guide head 41 and the right guide head 42 are closed, the left and right half-grooves 411 and 421 close to form a flushing pipe 5. The flushing pipe 5 can connect to the inside of the guide tube 1 to connect to the receiving cavity 2 or the lacrimal duct prosthesis. The bottom of the flushing pipe can also be connected to a flushing syringe. The diameter of the flushing pipe 5 can be designed according to the flushing conditions, including... Figure 4 As shown, the flushing pipe 5 can be designed as a long, thin tube or a gradually tapered tube.

[0021] Furthermore, in this embodiment, as Figure 1 , Figure 2 and Figure 5 The elastic clamping part 3 shown is a U-shaped elastic clamp handle. The two ends of the elastic clamp handle are respectively connected to the upper ends of the left half tube 11 and the right half tube 12. In this embodiment, the elastic clamp handle is also integrated with the left half tube 11 and the right half tube 12. In other embodiments, the elastic clamp handle is detachably connected to the left half tube 11 and the right half tube 12 for easy replacement.

[0022] Furthermore, in this implementation, such as Figure 5and Figure 7 The elastic handle shown has two semi-frustum-shaped ends with reinforcing cavities 31. The outer diameter of the elastic handle remains unchanged at both ends, while the inner diameter gradually decreases from the head end to the tail end of the reinforcing cavity 31. In this way, when the two ends of the elastic handle come into contact with each other, they can achieve surface contact through the gradually decreasing inner diameter. The reinforcing cavity 31 can also deform appropriately, so that the gradually decreasing inner diameter can be completely fitted. This is beneficial to the stable fit between the left half tube 11 and the right half tube 12, thereby more firmly clamping the lacrimal duct prosthesis.

[0023] Furthermore, in this embodiment, a depth scale marker 14 is also provided on the left half tube 11 and / or the right half tube 12.

[0024] As attached Figure 1 As shown, the scale marking 14 can be set on the outer surface of the left half tube 11 and / or the right half tube 12. During operation, as the guide tube 1 holding the lacrimal duct prosthesis is inserted deeper, the operator can easily observe the change of the depth scale marking to confirm the depth of the lacrimal duct prosthesis insertion auxiliary device relative to the lacrimal duct, so as to accurately grasp the insertion depth.

[0025] Furthermore, the outer walls of the left half-tube 11, the right half-tube 12, and / or the conical guide head 4 are distributed with smooth protrusions 6.

[0026] As attached Figure 8 As shown, the protrusion 6 itself is smooth, and the connection with the outer wall is also a smooth transition. Its function is that when it comes into contact with the lacrimal duct wall, the protrusion 6 can form a local point contact, reducing the friction between them, so that the guide tube 1 and the conical guide head 4 can enter and exit the lacrimal duct more smoothly.

[0027] Furthermore, a long groove 13 is left in front of the guide tube 1, and the long groove 13 is formed by the notch left between the front sides of the left half tube 11 and the right half tube 12.

[0028] Specifically, the adjacent anterior sides of the left half-tube 11 and the right half-tube 12 are both radially constricted, thus leaving a long groove 13 in front of the guide tube 1. This facilitates easy access to the inner wall of the lacrimal duct even without further dilation when performing intraoperative irrigation or medication with a syringe.

[0029] In the detailed description of this invention, the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and do not indicate or imply that the device or element referred to must have a specific orientation or positional relationship. Therefore, they should not be construed as limitations on the invention. It is understood that the above embodiments only illustrate preferred embodiments of the invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can freely combine the above technical features and make various modifications and improvements without departing from the inventive concept of the invention; all of these fall within the protection scope of the invention. Therefore, all equivalent transformations and modifications made to the claims and scope of the invention should be covered by the claims of the invention.

Claims

1. An auxiliary device for lacrimal duct prosthesis placement in cases of lacrimal punctum stenosis, characterized in that: The device includes a guide tube (1) and a tapered guide head (4) located at the lower end of the guide tube (1). The guide tube (1) includes a left half tube (11) and a right half tube (12) arranged opposite to each other. An elastic clamping part (3) is connected above the left half tube (11) and the right half tube (12). The left half tube (11) and the right half tube (12) can be opened and closed by the elastic clamping part (3). An arc-shaped left groove (111) and a right groove (121) are formed on opposite sides of the left half tube (11) and the right half tube (12) along the length direction, respectively. The left groove (111) and the right groove (121) can be assembled to form a receiving cavity (2). The tapered guide head (4) includes a left guide head (41) and a right guide head (42) connected to the lower ends of the left half tube (11) and the right half tube (12), respectively. The left guide head (41) and the right guide head (42) can be closed and connected.

2. The lacrimal duct prosthesis insertion auxiliary device for lacrimal punctum stenosis according to claim 1, characterized in that: The left half tube (11), the right half tube (12), the left guide head (41), and the right guide head (42) are all elastic thin-walled structures, and the outer surfaces of the conical guide head (4) and the guide tube (1) are smooth.

3. The lacrimal duct prosthesis placement auxiliary device for lacrimal punctum stenosis according to claim 1, characterized in that: The left half tube (11) and the right half tube (12) can be in surface contact or line contact with the lacrimal duct prosthesis through the elastic clamping part (3).

4. The lacrimal duct prosthesis placement auxiliary device for lacrimal punctum stenosis according to claim 1 or 2, characterized in that: The left guide head (41) and the right guide head (42) are provided with a vertically connected left half groove (411) and a right half groove (421) on opposite sides. When the left guide head (41) and the right guide head (42) are closed, the left half groove (411) and the right half groove (421) are closed to form a flushing pipe (5). The flushing pipe (5) is connected to the inside of the guide tube (1) so as to be connected to the receiving cavity (2) or the lacrimal duct prosthesis.

5. The lacrimal duct prosthesis placement auxiliary device for lacrimal punctum stenosis according to claim 1, characterized in that: The elastic clamping part (3) is a U-shaped elastic clamp handle, and the two ends of the elastic clamp handle are respectively connected to the upper ends of the left half tube (11) and the right half tube (12).

6. The lacrimal duct prosthesis placement auxiliary device for lacrimal punctum stenosis according to claim 5, characterized in that: The two ends of the elastic handle are semi-conical and have reinforcing cavities (31). The outer diameter of the two ends of the elastic handle remains unchanged, while the inner diameter gradually decreases from the head end of the reinforcing cavity (31) to the end end of the reinforcing cavity (31).

7. The lacrimal duct prosthesis insertion auxiliary device for lacrimal punctum stenosis according to claim 1, characterized in that: A depth scale marker (14) is also provided on the left half tube (11) and / or the right half tube (12).

8. The lacrimal duct prosthesis placement auxiliary device for lacrimal punctum stenosis according to claim 1, characterized in that: The outer walls of the left half tube (11), the right half tube (12) and / or the conical guide head (4) are covered with smooth protrusions (6).

9. The lacrimal duct prosthesis placement auxiliary device for lacrimal punctum stenosis according to claim 1, characterized in that: The guide tube (1) has a long groove (13) in front of it. The long groove (13) is formed by the gap left between the front sides of the left half tube (11) and the right half tube (12).

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