Laser emission structure, optical fiber catheter and ablation treatment device

Abstract

The utility model discloses a laser emission structure, an optical fiber catheter and an ablation treatment device, and relates to the technical field of vein ablation. The laser emission structure comprises a fiber core, a light transmitting piece and a heat shrink tube. The fiber core is provided with a light-emitting end; the light transmitting piece covers the light emitting end of the fiber core; the heat shrink tube is arranged on the peripheral wall of the fiber core and attached to the inner wall of the light-transmitting piece, and the fiber core, the heat shrink tube, the light-transmitting piece and the cut-off face of the protective layer of the optical fiber guide pipe are suitable for being defined to form a glue groove used for being filled with glue, so that the light-transmitting piece is fixed to the light-emitting end of the fiber core in an adhesive mode through the glue. According to the utility model, the structure of the transmitting end of the optical fiber catheter is improved, the coaxiality of the optical fiber and the capillary tube is ensured, glue can be effectively prevented from permeating into the cone, the firmness of the transmitting end of the optical fiber catheter is improved, the reliability is better, and the treatment effect and the operation safety are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of venous ablation, and in particular to a laser emission structure, an optical fiber catheter and an ablation treatment device. Background Art

[0002] Endovenous Laser Treatment (EVLT) is a procedure that uses a special wavelength of laser to insert into the great saphenous vein trunk through a disposable laser fiber catheter, and then perform thermal closure of the vein. The transmitter end of the fiber catheter has a tapered optical fiber that emits energy radially at 360 degrees. The laser irradiates the inner wall of the vein, which causes the vein to contract. The fiber catheter is then slowly withdrawn, and during this process, the great saphenous vein collapses and closes along its entire length.

[0003] In the prior art, the structure of the distal end of the laser fiber optic catheter has certain limitations. At the head end of the fiber optic catheter, the capillary is sleeved on the periphery of the fiber optic cone, and the capillary and the fiber optic protective layer are bonded only by glue. This technology may have the problem of glue leakage. The glue on one or more sides may flow to the cone surface of the optical fiber where light is emitted. When the optical fiber is in the light emitting state, the cone surface is the light emitting surface, and a large amount of heat will be generated on the light emitting surface, causing the glue to melt or even deform, resulting in damage to the treatment end. Utility Model Content

[0004] The main purpose of the utility model is to provide a laser emission structure, an optical fiber catheter and an ablation treatment device, which are intended to prevent glue from penetrating into the light-emitting surface of the optical fiber to avoid damage to the treatment end.

[0005] To achieve the above object, the utility model proposes a laser emission structure, comprising:

[0006] A fiber core having a light output end;

[0007] A light-transmitting member, which is covered on the light-emitting end of the fiber core; and

[0008] The heat shrink tube is arranged on the outer peripheral wall of the fiber core and abuts against the inner wall of the light-transmitting member. The fiber core, the heat shrink tube and the light-transmitting member are suitable for surrounding the cut surface of the protective layer of the optical fiber conduit to form a glue groove for filling glue, so that the light-transmitting member is fixed to the light-emitting end of the fiber core by glue bonding.

[0009] Optionally, the heat shrinkable tube is a circular tube or an annular coating, and the heat shrinkable tube is coaxially arranged with the fiber core to ensure the coaxiality of the fiber core and the light-transmitting member.

[0010] Optionally, there is a gap between the cross-section of the light-transmitting member and the protective layer to form an annular glue injection groove; or

[0011] The light-transmitting member abuts against the cut surface of the protective layer and a through hole or an opening is provided at the abutting position to form a glue injection hole or a glue injection port.

[0012] Optionally, the light-transmitting element is a capillary.

[0013] Optionally, the laser emitting structure further includes a reinforcement piece, which is coated on the outer peripheral wall of the fiber core, and the heat shrink tube is arranged on the reinforcement piece, and the reinforcement piece, the heat shrink tube, the light-transmitting member and the cut surface of the protective layer are surrounded to form the glue groove.

[0014] Optionally, the reinforcement member is adapted to be a portion of a coating layer of the optical fiber conduit extending into the light-transmitting member.

[0015] Optionally, the light-emitting end of the fiber core is tapered, and a distance is left between the end of the coating layer and the light-emitting end of the fiber core.

[0016] Optionally, the heat shrink tube is arranged on the outer periphery of one end of the reinforcement member close to the light emitting end of the fiber core.

[0017] To achieve the above object, the utility model provides an optical fiber catheter, comprising:

[0018] A catheter, the distal end of which is provided with the above-mentioned laser emitting structure; and

[0019] A connector connected to the proximal end of the catheter and adapted to be connected to a laser source device;

[0020] Wherein, the laser emitting structure comprises:

[0021] A fiber core having a light output end;

[0022] A light-transmitting member, which is covered on the light-emitting end of the fiber core; and

[0023] The heat shrink tube is arranged on the outer peripheral wall of the fiber core and abuts against the inner wall of the light-transmitting member. The fiber core, the heat shrink tube and the light-transmitting member are suitable for surrounding the cut surface of the protective layer of the optical fiber conduit to form a glue groove for filling glue, so that the light-transmitting member is fixed to the light-emitting end of the fiber core by glue bonding.

[0024] To achieve the above objectives, the present invention also provides an ablation treatment device, comprising:

[0025] The optical fiber conduit; and

[0026] The laser source device is connected to the optical fiber conduit.

[0027] In the technical solution of the utility model, the laser emission structure includes a fiber core, a light-transmitting member and a heat shrink tube; the fiber core has a light-emitting end; the light-transmitting member is covered on the light-emitting end of the fiber core; the heat shrink tube is arranged on the outer peripheral wall of the fiber core and abuts on the inner wall of the light-transmitting member, and the fiber core, the heat shrink tube, and the light-transmitting member are suitable for surrounding the cut surface of the protective layer of the optical fiber conduit to form a glue groove for filling glue, so that the light-transmitting member is fixed to the light-emitting end of the fiber core by gluing. It can be understood that the utility model can prevent the glue from penetrating into the light-emitting surface of the optical fiber by setting the heat shrink tube to limit the glue in the glue groove, thereby preventing the glue from being melted by the large amount of heat generated by the light-emitting surface, thereby avoiding damage to the treatment end due to the melting of the glue due to heat. At the same time, since the heat shrink tube is a circular tube or coating, it can play a role in fixing and positioning the fiber core in the light-transmitting member, and can prevent the fiber core from being eccentric, thereby helping to ensure the coaxiality of the fiber core and the light-transmitting member. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 This is a schematic structural diagram of an embodiment of the laser emission structure of the utility model;

[0030] Figure 2 for Figure 1 The enlarged view of the local A in the middle;

[0031] Figure 3 It is a schematic diagram of the reinforcing principle of the reinforcing member when the light-transmitting member is misaligned in one embodiment of the laser emission structure of the utility model;

[0032] Figure 4 It is a structural schematic diagram of an embodiment of the optical fiber conduit of the utility model.

[0033] Description of Figure Numbers:

[0034] 10. Fiber core; 20. Light-transmitting member; 30. Heat shrink tube; 40. Reinforcement member; 101. Protective layer; 100. Laser emitting structure; 110. Catheter; 120. Connector; 10a. Glue groove.

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] The present invention provides a laser emitting structure 100 which can be applicable to an optical fiber catheter, but is not limited here.

[0041] Reference Figures 1 to 4In one embodiment of the utility model, the laser emitting structure 100 includes a fiber core 10, a light-transmitting member 20 and a heat-shrinkable tube 30; the fiber core 10 has a light-emitting end; the light-transmitting member 20 is covered on the light-emitting end of the fiber core 10; the heat-shrinkable tube 30 is directly or indirectly arranged on the outer peripheral wall of the fiber core 10 and abuts against the inner wall of the light-transmitting member 20, and the fiber core 10, the light-transmitting member 20, the heat-shrinkable tube 30 and the cut surface of the protective layer 101 suitable for the optical fiber conduit are surrounded to form a glue groove 10a for filling with glue, so that the light-transmitting member 20 is fixed to the light-emitting end of the fiber core 10 by glue bonding.

[0042] It should be specially explained that the heat shrink tube 30 is directly disposed on the outer peripheral wall of the fiber core 10, which means that the inner peripheral wall of the heat shrink tube 30 is in close contact with the outer peripheral wall of the fiber core 10; the heat shrink tube 30 is indirectly disposed on the outer peripheral wall of the fiber core 10, which means that other components or structural layers may be disposed between the inner peripheral wall of the heat shrink tube 30 and the outer peripheral wall of the fiber core 10.

[0043] That is to say, the technical solution claimed for protection by the utility model at least covers the following two structural forms:

[0044] 1) There is no component or structural layer between the heat shrink tube 30 and the fiber core 10, and the two are in direct contact;

[0045] 2) Other components or structural layers are provided between the heat shrink tube 30 and the fiber core 10 , and the two are in indirect contact.

[0046] In this embodiment, the fiber core 10 is a device located in the center of the optical fiber conduit and used for light transmission. It is a double-layer concentric cylinder with a small cross-sectional area made of quartz glass. It is brittle and easy to break, and needs to be covered with an insulating layer for protection.

[0047] The light-transmitting member 20 may be made of a transparent material with good light transmittance, and may preferably be a common capillary tube, which is not limited here.

[0048] The heat shrink tube 30 can be preferably made of PET material, and can be a round tube or an annular coating, etc., which is not limited here. In the present application, by setting the heat shrink tube 30, when the light-emitting surface of the fiber core 10 generates a large amount of heat, the heat shrink tube 30 can better rely on its own properties to deform and shrink to fit closely to the fiber core 10, so that the effect of preventing glue from overflowing is better.

[0049] When installing the laser emitting structure 100, it is usually necessary to first remove the outer skin, i.e. the protective layer 101, of a small section of the distal end of the optical fiber conduit, retain the middle fiber core 10, and then put the heat shrink tube 30 on the appropriate position of the exposed fiber core 10 (when the heat shrink tube 30 is a coating, a coating of a certain thickness can be applied to the exposed fiber core 10 through a coating device, etc.), and then cover the light-transmitting component 20 on the outer peripheral wall of the exposed section of the fiber core 10 and reserve a gap of appropriate size between it and the cut surface of the protective layer 101 of the optical fiber conduit to form an annular glue injection groove, and then inject glue into the glue groove 10a through the annular glue injection groove, thereby completing the installation of the laser emitting structure 100.

[0050] It is worth mentioning that in addition to the method of injecting glue using an annular glue injection groove, the light-transmitting member 20 can also be set in abutment with the cut surface of the protective layer 101 and a number of through holes or openings can be set at the abutment to form a glue injection hole or a glue injection port, and then the glue groove 10a can be injected with glue through the glue injection hole or the glue injection port.

[0051] It should be noted that the position of the heat shrink tube 30 should not be too close to the light emitting cone surface of the fiber core 10 , nor too close to the end surface of the right protective layer 101 , and sufficient and appropriate space should be left for the glue.

[0052] It can be understood that the utility model sets a heat shrink tube 30 to confine the glue in the glue groove 10a, thereby preventing the glue from penetrating into the light-emitting surface of the fiber core 10, avoiding the large amount of heat generated by the light-emitting surface from melting the glue, and thus avoiding damage to the treatment end due to the melting of the glue due to heat.

[0053] In addition, the utility model sets a heat shrink tube 30, which is a circular tube or an annular coating. The heat shrink tube 30 is coaxially arranged with the fiber core 10, which can fix and position the fiber core 10 in the light-transmitting component 20, prevent the fiber core 10 from being eccentric, and thus help ensure the coaxiality of the fiber core 10 and the light-transmitting component 20.

[0054] In addition, in the prior art, when the fiber core 10 and the light-transmitting member 20 are fixed by welding, high temperature melting at the welding point can easily cause the lower fiber core 10 and the light-transmitting member 20 to break.

[0055] In the present invention, the heat shrink tube 30 is provided and glue is used to bond the fiber core 10 and the light-transmitting member 20 without welding, which can prevent the fiber core 10 and the light-transmitting member 20 from breaking at the welding point during the welding process, thereby reducing the treatment risk.

[0056] In order to further improve the robustness of the laser emitting structure 100 to ensure the treatment effect and the safety of the operation, refer to Figures 1 to 3In some embodiments, the laser emitting structure 100 may further include a reinforcement 40, which is coated on the outer periphery of the fiber core 10, and the heat shrink tube 30 is sleeved on the reinforcement 40, and the reinforcement 40, the heat shrink tube 30, the light-transmitting member 20 and the end of the protective layer 101 are surrounded to form a glue groove 10a.

[0057] In this embodiment, the reinforcing member 40 is suitable for being the portion of the coating layer of the optical fiber conduit extending into the light-transmitting member 20 (the coating layer is a structural layer inherent in the optical fiber conduit). Of course, in some other application scenarios, a separate reinforcing member 40 may also be provided, and the reinforcing member 40 may be directly sleeved or coated on the outer periphery of the exposed optical core 10. The reinforcing member 40 may be a sleeve made of acrylic resin or the like, which is not limited here.

[0058] Furthermore, the light-emitting end of the fiber core 10 is tapered or in other shapes, and a distance is left between the end of the coating layer and the light-emitting end of the fiber core 10. The heat shrink tube 30 can be arranged on the outer periphery of one end of the reinforcement member 40 close to the light-emitting end of the fiber core 10. In this way, the length of the glue groove 10a tends to be moderate, which not only ensures the bonding strength, but also does not interfere with the laser emission from the light-emitting end of the fiber core 10.

[0059] It should be noted that, with regard to the technical solution of this embodiment, when installing the laser emitting structure 100, when removing a small section of the protective layer 101 at the distal end of the optical fiber conduit, the coating layer on the fiber core 10 should be retained while retaining the middle fiber core 10. In order not to affect the light output from the light output end of the fiber core 10, the retained length of the coating layer should be less than the exposed length of the distal end of the fiber core 10.

[0060] Reference Figures 1 to 4 The utility model further proposes an optical fiber catheter, which includes a catheter 110 and a connector 120. The connector 120 is connected to the proximal end of the catheter 110 and is suitable for connecting to a laser source device. The distal end of the catheter 110 is provided with the above-mentioned laser emitting structure 100. The specific structure of the laser emitting structure 100 refers to the above-mentioned embodiment. Since the optical fiber catheter proposed in the utility model includes all schemes of all embodiments of the above-mentioned laser emitting structure 100, it has at least the same technical effect as the above-mentioned laser emitting structure 100, which will not be elaborated here one by one.

[0061] The fiber optic catheter acts on the inferior vena cava of the human body, intervenes into the great saphenous vein trunk through the optical fiber, and then performs thermal closure of the vein.

[0062] The present invention also proposes an ablation treatment device, which includes a fiber optic catheter and a laser source device connected thereto. The specific structure of the fiber optic catheter refers to the above-mentioned embodiment. Since the ablation treatment device proposed by the present invention includes all schemes of all embodiments of the above-mentioned fiber optic catheter, it has at least the same technical effects as the above-mentioned fiber optic catheter, which will not be elaborated here one by one.

[0063] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A laser emitting structure, characterized in that: include: A fiber core having a light output end; A light-transmitting member, which is covered on the light-emitting end of the fiber core; as well as The heat shrink tube is arranged on the outer peripheral wall of the fiber core and abuts against the inner wall of the light-transmitting member. The fiber core, the heat shrink tube and the light-transmitting member are suitable for surrounding the cut surface of the protective layer of the optical fiber conduit to form a glue groove for filling glue, so that the light-transmitting member is fixed to the light-emitting end of the fiber core by glue bonding.

2. The laser emitting structure according to claim 1, characterized in that: The heat shrinkable tube is a circular tube or an annular coating, and the heat shrinkable tube is coaxially arranged with the fiber core to ensure the coaxiality of the fiber core and the light-transmitting member.

3. The laser emitting structure according to claim 1, characterized in that: There is a gap between the cross-section of the light-transmitting member and the protective layer to form an annular glue injection groove; or The light-transmitting member abuts against the cut surface of the protective layer and a through hole or an opening is provided at the abutting position to form a glue injection hole or a glue injection port.

4. The laser emitting structure according to claim 1, characterized in that: The light-transmitting element is a capillary tube.

5. The laser emitting structure according to any one of claims 1 to 4, characterized in that: The laser emitting structure also includes a reinforcement piece, which is coated on the outer peripheral wall of the fiber core. The heat shrink tube is arranged on the reinforcement piece. The reinforcement piece, the heat shrink tube, the light-transmitting member and the cut surfaces of the protective layer are surrounded to form the glue groove.

6. The laser emitting structure according to claim 5, characterized in that: The reinforcing member is suitably a portion of the coating layer of the optical fiber conduit extending into the light-transmitting member.

7. The laser emitting structure according to claim 6, characterized in that: The light-emitting end of the fiber core is tapered, and a distance is left between the end of the coating layer and the light-emitting end of the fiber core.

8. The laser emitting structure according to claim 7, characterized in that: The heat shrink tube is arranged on the outer periphery of one end of the reinforcement member close to the light-emitting end of the fiber core.

9. An optical fiber catheter, characterized in that: include: A catheter, wherein the distal end of the catheter is provided with a laser emitting structure as claimed in any one of claims 1 to 8; as well as The connector is connected to the proximal end of the catheter and is suitable for connecting to a laser source device.

10. An ablation treatment device, characterized in that: include: The optical fiber conduit of claim 9; and The laser source device is connected to the optical fiber conduit.

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