Laser fiber catheter and medical equipment
By setting reinforcement and guidewire channels at the distal end of the laser fiber catheter, the problem of insufficient hardness of the existing catheter in complex blood vessels is solved, and the compliance and operational convenience of the catheter in complex blood vessels is achieved, reducing the risk of surgery.
Patent Information
- Application Number
- CN202422230352.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-09-11
AI Technical Summary
The existing laser fiber catheter of varicose veins in the lower limbs is insufficient in complex blood vessels, resulting in increased operational difficulty and increased surgical risk.
Reinforcements are provided at the distal end of the light transmission body to enhance the hardness of the catheter, and guide wire channels and liquid injection holes are provided on the reinforcement to improve the compliance and operational convenience of the catheter.
The reinforcement increases the hardness of the catheter, allowing it to adapt to complex vascular conditions, reduces the risk of surgery and difficulty of operation, and improves the operation convenience of medical staff.
Smart Images
Figure CN223232788U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a laser optical fiber catheter and medical equipment. Background Art
[0002] Varicose veins of the lower extremities are a common venous disease in vascular surgery, with an incidence rate of up to 20% in the general population. The incidence of varicose veins increases with age, severely impacting quality of life and increasing the economic burden on society. Patients with varicose veins often experience discomfort such as lumpy protrusions, soreness, heaviness, and fatigue. Left untreated, these conditions can progress to limb edema, eczema, hyperpigmentation, venous ulcers, and even thrombophlebitis, significantly impacting patients' work and daily lives.
[0003] Currently, the diagnosis and preoperative evaluation of varicose veins of the lower extremities primarily rely on color Doppler ultrasound and digital subtraction angiography (DSA). Color Doppler ultrasound is the preferred adjunctive examination for varicose veins of the lower extremities due to its safety, non-invasiveness, simplicity, and rapidity. Although antegrade venography is considered the gold standard for diagnosing varicose veins of the lower extremities, it is not currently used routinely in clinical practice due to its invasive nature. However, in some cases, such as congenital venous malformations of the lower extremities, complex communicating veins, deep venous dysfunction, and iliac vein entrapment or stenosis, lower extremity venography offers advantages in terms of visual acuity and accuracy, and is particularly indispensable for the primary management of comorbidities using DSA. However, relying solely on color Doppler ultrasound can lead to misdiagnosis or missed diagnosis in patients with comorbidities such as saphenous vein anatomy, Cockett syndrome, post-deep vein thrombosis syndrome, and KT syndrome. Conservative treatment of varicose veins of the lower extremities is ineffective. Traditional high ligation and stripping procedures are invasive and prone to recurrence.
[0004] Intracavitary laser therapy is minimally invasive, offers reliable results, and has a relatively low recurrence rate. Existing fiber-optic laser catheters for varicose veins of the lower extremities typically utilize a single optical fiber. To accommodate conventional blood vessels, these catheters are relatively soft. However, in more complex vascular conditions, these catheters are not rigid enough and have poor compliance. This makes it difficult for the catheter's application tip to enter the vessel, increasing operational complexity for medical personnel and posing certain surgical risks. Utility Model Content
[0005] The main purpose of the present utility model is to provide a laser fiber optic catheter and medical equipment, aiming to increase the hardness of the catheter, improve the compliance of the catheter, make it adaptable to more complex vascular conditions, improve the convenience of operation for medical staff, and reduce surgical risks.
[0006] To achieve the above objectives, the present invention provides a laser fiber catheter, comprising:
[0007] a light transmission body, wherein the proximal end of the light transmission body is suitable for connecting to a laser light source, and the distal end of the light transmission body is suitable for extending into a blood vessel; and
[0008] A reinforcing member is provided on the light transmission body and is at least used to enhance the hardness of the distal end of the laser optical fiber catheter. The length of the reinforcing member is smaller than the length of the light transmission body.
[0009] Optionally, the reinforcement is in the shape of a solid column; or the reinforcement is in the shape of a tube, and the reinforcement is provided with at least a guidewire channel for guiding a guidewire.
[0010] Optionally, the distal end of the light transmission body is an application head, and the reinforcement does not extend to the application head.
[0011] Optionally, when the reinforcement member is tubular, the cross-section of the light transmission body and the reinforcement member as a whole is arranged in the shape of an "8" or an "∞".
[0012] Optionally, a plurality of liquid injection holes connected to the guide wire channel are opened on the distal peripheral wall of the reinforcement component, and the guide wire channel is also used for infusing liquid.
[0013] Optionally, the diameter of the injection hole is smaller than the diameter of the guide wire channel.
[0014] Optionally, the laser optical fiber catheter further comprises a liquid injection connector connected to the proximal end of the reinforcement, and the liquid injection connector is suitable for connecting to a liquid storage container.
[0015] Optionally, the laser fiber catheter further comprises a blocking device for blocking a portion of the distal port of the guidewire channel, and the blocking device is movably inserted into the distal port of the guidewire channel along the axial direction of the reinforcement.
[0016] Optionally, the laser fiber catheter further includes a connector, which is provided at the proximal end of the light transmission body, and the light transmission body is connected to the laser light source via the connector.
[0017] To achieve the above-mentioned purpose, the present invention further proposes a medical device, comprising a laser host and the above-mentioned laser fiber catheter connected to the laser host, wherein the laser host is the laser light source, and the laser fiber catheter comprises:
[0018] a light transmission body, wherein the proximal end of the light transmission body is suitable for connecting to a laser light source, and the distal end of the light transmission body is suitable for extending into a blood vessel; and
[0019] A reinforcing member is provided on the light transmission body and is at least used to enhance the hardness of the distal end of the laser optical fiber catheter. The length of the reinforcing member is smaller than the length of the light transmission body.
[0020] In the technical solution of the present invention, the laser fiber catheter comprises a light transmission body and a reinforcement member. The proximal end of the light transmission body is adapted to be connected to a laser light source, and the distal end of the light transmission body is adapted to be inserted into a blood vessel. The reinforcement member is disposed on the light transmission body and serves to at least enhance the rigidity of the distal end of the laser fiber catheter. The length of the reinforcement member is shorter than the length of the light transmission body. It can be understood that the present invention improves the structure of the laser fiber catheter. By disposing a reinforcement member at the distal end of the light transmission body, the rigidity of the catheter is effectively increased without being too rigid to adapt to common blood vessel conditions. This effectively improves the catheter's compliance, enabling it to adapt to the varying conditions of various blood vessels, particularly those with more complex conditions. This significantly enhances the convenience of operation for medical personnel and helps reduce surgical risks. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.
[0022] Figure 1 This is a schematic structural diagram of an embodiment of the laser fiber catheter of the present utility model;
[0023] Figure 2 This is a schematic structural diagram of another embodiment of the laser fiber catheter of the present utility model;
[0024] Figure 3 This is a schematic structural diagram of another embodiment of the laser fiber catheter of the present utility model;
[0025] Figure 4 This is a structural diagram of a first arrangement of liquid injection holes in another embodiment of the laser optical fiber catheter of the present utility model;
[0026] Figure 5 for Figure 4 A cross-sectional view of the distal end of the laser fiber catheter;
[0027] Figure 6 This is a structural diagram of a second arrangement of liquid injection holes in another embodiment of the laser optical fiber catheter of the present utility model;
[0028] Figure 7 for Figure 6 A cross-sectional view of the distal end of the laser fiber catheter;
[0029] Figure 8 This is a structural diagram of another embodiment of the laser fiber catheter of the present utility model.
[0030] Description of Figure Numbers:
[0031] 10. Optical transmission body; 20. Reinforcement member; 30. Liquid injection joint; 40. Blocking device; 50. Connector; 11. Application head; 20a. Guidewire channel; 20b. Liquid injection hole.
[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.
[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such 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 in which A and B are satisfied at the same time. 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 mutually 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 present invention.
[0037] The utility model provides a laser optical fiber catheter which can be applied to intracavitary laser treatment surgery.
[0038] Reference Figures 1 to 3 In some embodiments of the present invention, the laser fiber optic catheter includes a light transmission body 10 and a reinforcement 20. The proximal end of the light transmission body 10 is suitable for connection with a laser light source, and the distal end of the light transmission body 10 is suitable for extending into a blood vessel; the reinforcement 20 is provided on the light transmission body 10 and is at least used to enhance the hardness of the distal end of the laser fiber optic catheter.
[0039] Because existing laser fiber catheters using a single optical fiber are relatively flexible and difficult for medical personnel to deliver to the target location in complex vascular conditions, this embodiment primarily focuses on optical transmission body 10 using a single optical fiber. Of course, to meet the catheter's adaptability and therapeutic efficacy requirements in certain special vascular conditions, optical transmission body 10 may also utilize two or more laser fibers, and the number of laser fibers is not limited herein.
[0040] It's worth noting that optical fibers are typically made of quartz. By extending the fiber forward to form an independent, ring-shaped light-emitting section, light is evenly scattered in all directions. During laser treatment, single- or dual-wavelength light is transmitted through the quartz fiber to the surrounding areas of the ring-shaped light-emitting section.
[0041] In this embodiment, the reinforcement 20 can be made of medical plastic materials such as nylon and polyurethane, and can be the same as or different from the material of the outer protective tube of the optical transmission body 10, which is not limited here. Figure 1 As shown, the reinforcement 20 can be a short section of solid columnar structure or hollow tubular plastic structure; Figure 2 As shown, the reinforcement 20 can also be a longer solid columnar structure or a hollow tubular plastic structure; in addition, it can also be an annular or arc-shaped coating structure coated on the distal peripheral wall of the outer tube of the light transmission body 10, which is not limited here.
[0042] In order to facilitate the connection of the laser light source, in this embodiment, Figures 1 to 3 As shown, the laser fiber catheter further includes a connector 50 , which is disposed at the proximal end of the light transmission body 10 , and the light transmission body 10 is connected to the laser light source via the connector 50 .
[0043] It can be understood that the present invention improves the structure of the laser fiber catheter. By setting a reinforcement part 20 at the distal end of the light transmission body 10, the hardness of the catheter is effectively increased without being too hard to adapt to ordinary blood vessel conditions. The compliance of the catheter is effectively improved so that it can adapt to the different conditions of various blood vessels, especially more complex blood vessel conditions, which greatly improves the convenience of operation for medical staff and helps to reduce surgical risks.
[0044] like Figures 1 to 3 As shown, the distal end of the optical transmission body 10 is the application head 11. In order to prevent the reinforcement 20 from affecting the treatment of the application head 11, the reinforcement 20 of this embodiment should not extend to the application head 11, and the length of the reinforcement 20 should be less than the length of the optical transmission body 10. This also helps to save material costs, and will not make the overall hardness of the catheter too high and greatly reduce the flexibility of the catheter. It can make the compliance of the laser fiber catheter in a moderate state to adapt to the different conditions of various blood vessels.
[0045] In order to make the laser fiber catheter adapt to more vascular conditions, the main reference Figures 4 to 8 In some embodiments, the reinforcement 20 is provided with at least a guidewire channel 20a for guiding a guidewire, that is, the reinforcement 20 is a tubular structure.
[0046] During the procedure, once the optical transmission device 10 enters the inferior vena cava, a guidewire can be used to pass through the guidewire channel 20a and insert the application head 11 of the optical transmission device 10 into the target blood vessel. This guidewire guidance facilitates the medical staff's manipulation of the optical transmission device 10, allowing it to be quickly and safely delivered to the target treatment site.
[0047] Furthermore, if Figures 4 to 8 As shown, the cross-section of the optical transmission body 10 and the reinforcement 20 as a whole can be set in the shape of "8" or "∞", so that the protective tube of the optical transmission body 10 and the reinforcement 20 can be integrally formed, which is more convenient to process, effectively ensures the reliability of the overall structure of the catheter, and prevents the reinforcement 20 from falling off and remaining in the body.
[0048] Reference Figures 1 to 8 In some embodiments, the distal wall of the reinforcement member 20 may be provided with a plurality of injection holes 20b connected to the guidewire channel 20a. The guidewire channel 20a is also used for infusing liquids. The laser fiber catheter of this embodiment may also include an injection connector 30, such as a Luer connector, connected to the proximal end of the reinforcement member 20. The injection connector 30 is suitable for connecting to a liquid storage container.
[0049] In this embodiment, the guidewire channel 20a is connected to a liquid supply container or device such as an infusion bottle or medicine bag through the injection connector 30, thereby realizing the infusion function. The infused drugs include but are not limited to contrast agents, saline, anesthetics, etc.
[0050] In order to improve the uniformity of drug dispersion and further enhance the therapeutic effect, refer to Figures 4 to 8 In this embodiment, the aperture of the injection hole 20b can be set to be smaller than the diameter of the guide wire channel 20a, and multiple injection holes 20b can be evenly arranged along the circumference of the reinforcement 20, or arranged in a spiral shape along the length direction of the reinforcement 20, which is not limited here.
[0051] During the procedure, laser fiber therapy can be initiated after the liquid is sprayed to achieve better therapeutic effects. Alternatively, while the catheter is being inserted into the blood vessel, liquid can be simultaneously injected into the guidewire channel 20a, allowing the liquid to be ejected through the injection hole 20b. This can help break up blood clots and facilitate smoother delivery of the catheter to the target treatment site.
[0052] In addition, the main reference Figure 8 In some embodiments, the laser fiber catheter may further include a blocking device 40 for partially blocking the distal end of the guidewire channel 20a. The blocking device 40 is movably inserted into the distal end of the guidewire channel 20a along the axial direction of the reinforcement member 20. This arrangement can prevent the entire drug from gushing out of the distal end of the guidewire channel 20a, thereby weakening the drug's efficacy and even affecting the laser treatment effect at the application end of the laser fiber catheter.
[0053] When liquid needs to be injected through the guide wire channel 20a, the distal port of the guide wire channel 20a can be blocked with the help of the blocking device 40. In this way, all or most of the injected liquid will flow out from the injection hole 20b on the periphery of the reinforcement 20 and be sprayed out from multiple directions at the same time, which is more conducive to the uniformity of liquid spraying.
[0054] The present invention also proposes a medical device, which includes a laser host and a laser fiber optic catheter connected to the laser host. The laser host is a laser light source. The specific structure of the laser fiber optic catheter refers to the above embodiment. Since the medical device proposed by the present invention includes all schemes of all embodiments of the above-mentioned laser fiber optic catheter, it has at least the same technical effects as the above-mentioned laser fiber optic catheter, which will not be elaborated here one by one.
[0055] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by utilizing the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A laser fiber catheter, characterized in that: include: a light transmission body, wherein the proximal end of the light transmission body is adapted to be connected to a laser light source, and the distal end of the light transmission body is adapted to be inserted into a blood vessel; as well as A reinforcing member is provided on the light transmission body and is at least used to enhance the hardness of the distal end of the laser optical fiber catheter. The length of the reinforcing member is smaller than the length of the light transmission body.
2. The laser fiber catheter according to claim 1, wherein: The reinforcement member is in the shape of a solid column; or the reinforcement member is in the shape of a tube, and the reinforcement member is provided with a guidewire channel at least for guiding a guidewire.
3. The laser fiber catheter according to claim 2, wherein: The distal end of the light transmission body is an application head, and the reinforcement does not extend to the application head.
4. The laser fiber catheter according to claim 2, wherein: When the reinforcement member is tubular, the cross section of the light transmission body and the reinforcement member as a whole is arranged in the shape of "8" or "∞".
5. The laser fiber catheter according to claim 2, wherein: A plurality of liquid injection holes connected to the guide wire channel are opened on the distal peripheral wall of the reinforcement component, and the guide wire channel is also used for infusing liquid.
6. The laser fiber catheter according to claim 5, characterized in that: The diameter of the injection hole is smaller than the diameter of the guide wire channel.
7. The laser fiber catheter according to claim 5, wherein: The laser optical fiber catheter further comprises a liquid injection joint communicated with the proximal end of the reinforcement member, and the liquid injection joint is suitable for connecting to a liquid storage container.
8. The laser fiber catheter according to claim 5, wherein: The laser optical fiber catheter further comprises a blocking device for blocking a portion of the distal end port of the guide wire channel. The blocking device is movably inserted into the distal end port of the guide wire channel along the axial direction of the reinforcement.
9. The laser fiber catheter according to claim 1, wherein: The laser fiber catheter further includes a connector, which is provided at the proximal end of the light transmission body, and the light transmission body is connected to the laser light source via the connector.
10. A medical device, characterized in that: The invention comprises a laser host and a laser fiber catheter according to any one of claims 1 to 9 connected to the laser host, wherein the laser host is the laser light source.