Laser ablation catheter device and laser ablation system
By designing a multi-cavity structure and imaging catheter probe in the laser ablation catheter, the problems of laser ablation damage to the blood vessel wall and aspiration blockage have been solved, achieving safer and more reliable ablation of intravascular lesions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2026-03-27
AI Technical Summary
In existing technologies, laser ablation catheters are prone to damaging the vessel wall when ablating lesions within blood vessels, and unreasonable design of the aspiration cavity leads to a high risk of blockage, affecting safety and reliability.
Design a laser ablation catheter device comprising a laser catheter, a handle, and a distal cannula, with multiple catheter lumens inside. The lumen of the third catheter is used as a suction chamber. Combined with real-time imaging using an imaging catheter probe, it can determine whether the laser is acting on the blood vessel wall and avoid damage.
It improves the safety and reliability of laser ablation, reduces the risk of damage to the blood vessel wall, and reduces the risk of blockage and improves ablation efficiency through real-time imaging and a large suction cavity design.
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Figure CN224039317U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of medical apparatus and instruments, especially to a laser ablation catheter device and an ablation system. BACKGROUND
[0002] For calcified tissue lesions, thrombus and chronic occlusion lesions in blood vessels, generally through the treatment of arterial intervention device, the instrument catheter is transported into the blood vessel, and the principle of laser ablation is used to eliminate plaque and hyperplasia tissue, so as to dredge the occluded or stenotic blood vessels. However, in practical application, the ablation laser may act on the blood vessel wall and cause damage to the blood vessel, resulting in poor safety.
[0003] When laser acts on biological tissue, a series of biological effects such as photochemical effect, thermal effect and mechanical effect will be produced. High peak power pulsed ultraviolet laser has high photon energy, which can directly destroy the chemical bonds between biological tissue molecules and break large molecular compounds into small fragments, and the tiny particles with a volume less than 25 μm are finally absorbed by the reticuloendothelial system, thereby avoiding the obstruction of microvessels. When the ultraviolet laser ablates thrombus and other lesion tissues, the shorter laser pulse (pulse width less than 15 ns) is more conducive to the effective range of ablation energy threshold, photochemical effect plays a major role, and thermal effect is small, otherwise, the longer laser pulse is used to heat the tissue.
[0004] In practical application, the ablation laser acts on the blood vessel wall and has the risk of damaging the blood vessel. Moreover, the blockage (small particles) produced by ablation needs to be sucked away. In the prior art, a separate suction cavity is arranged in the ablation catheter, which increases the outer diameter of the catheter, and at the same time, the small size of the suction cavity is not conducive to the suction of small particles produced by ablation, and is easy to cause secondary blockage and other adverse results, and the reliability is poor. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the defects of the prior art, and provides a laser ablation catheter device and an ablation system, which are safe and reliable.
[0006] The utility model discloses a technical scheme is: a kind of laser ablation catheter device, including laser catheter, handle and the distal sleeve connected to the handle, the handle has ablation optical fiber tube cavity proximal end entrance, the laser catheter passes through the ablation optical fiber tube cavity proximal end entrance and passes out the distal sleeve, first catheter, second catheter and third catheter are arranged in the distal sleeve, the first catheter, second catheter are arranged in the third catheter, and ablation optical fiber is arranged between the third catheter and the distal sleeve;The first catheter is provided with first lumen, and the second catheter is provided with second lumen, and the cavity except the first lumen and the second lumen in the lumen of third catheter is third lumen;First lumen is used for placing imaging catheter probe;The second lumen is used for wire guide wire to pass through;The third lumen is suction cavity.
[0007] Specifically, the diameter of the first lumen is greater than the diameter of the second lumen;The position of the first lumen and the second lumen in the third catheter is eccentrically arranged, and the first catheter and the second catheter are tangent to each other, and the first catheter and the second catheter are both inscribed in the third catheter.
[0008] Specifically, the laser ablation catheter device comprises an imaging catheter probe, and the imaging catheter probe comprises an illumination optical fiber and an imaging module;The imaging module is a video imaging catheter probe, an optical coherence tomography probe or an intravascular ultrasound probe.
[0009] Specifically, the handle is provided with a guidewire lumen proximal end entrance for the guidewire to extend into and a suction lumen proximal end entrance for connecting an external suction device;The second lumen is communicated with the guidewire lumen proximal end entrance;The suction lumen proximal end entrance is communicated with the third lumen.
[0010] Specifically, the laser catheter comprises a laser ablation conductor, and the laser ablation conductor is connected to the ablation optical fiber for conducting laser to the ablation optical fiber;
[0011] The laser ablation conductor comprises a single optical fiber or a plurality of optical fiber bundles composed of ultraviolet multimode optical fibers;Alternatively, the laser ablation conductor is a fiber combiner assembly, the fiber combiner assembly comprises a first optical fiber and a plurality of second optical fibers, the core diameter of the first optical fiber is greater than the core diameter of the second optical fibers, each second optical fiber forms a bundled input optical fiber, and the bundled input optical fiber is fused to the first optical fiber.
[0012] Specifically, the fiber combiner assembly further comprises a tapered combiner optical fiber, the two ends of the tapered combiner optical fiber are a first end and a second end respectively, the diameter of the first end is smaller than the diameter of the second end, the first end is connected to the bundled input optical fiber, and the second end is connected to a bundled output optical fiber.
[0013] Or, the two ends of the fiber bundle assembly have the same diameter, a plurality of second optical fibers wrapped in the sleeve form a bundle input optical fiber, and the bundle input optical fiber is fused to the first optical fiber.
[0014] Each second optical fiber in the bundle input optical fiber is arranged in a honeycomb / hexagonal shape, and the second optical fiber on the outer layer of the bundle input optical fiber is inscribed in the sleeve.
[0015] Specifically, the cross section of each second optical fiber is circular, the second optical fiber is provided with at least 7, each second optical fiber is arranged in a honeycomb shape, each second optical fiber is tangent to the adjacent second optical fiber, and each second optical fiber is arranged in at least two layers.
[0016] Specifically, the front end of the third conduit is connected with a conduit distal end inner tube; the ablation optical fiber is connected with the second optical fiber to form an ablation optical fiber layer, and the ablation optical fiber layer is wrapped in the outer layer of the third conduit and the conduit distal end inner tube.
[0017] The distal end of the distal sleeve is provided with a developing member.
[0018] The utility model also provides a kind of laser ablation conduit device, including laser, still including above-mentioned laser ablation conduit device, and the laser ablation conduit device is connected to the laser.
[0019] The laser ablation conduit device and the ablation system provided by the utility model do not need to open a separate suction cavity, use the cavity in the inner cavity of the third conduit as the suction cavity except the first lumen and the second lumen, the suction effect is good, improve the efficiency of small particles generated after ablation being flushed and being taken away by suction cavity, the suction cavity is not easy to block, and the imaging conduit probe can be used to assist real-time imaging of the ablation situation in the blood vessel during laser ablation, to judge whether the ablation laser directly acts on the blood vessel wall by image, which can effectively reduce the risk of damage to the blood vessel caused by the ablation laser acting on the blood vessel wall, effectively improve the safety during ablation, and the reliability is good. BRIEF DESCRIPTION OF DRAWINGS
[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.
[0021] Figure 1 It is a plane schematic view of the laser ablation conduit device provided by the embodiments of the utility model;
[0022] Figure 2It is a longitudinal section schematic view of a distal end sleeve pipe in a laser ablation catheter device provided by the embodiment of the utility model;
[0023] Figure 3 It is a horizontal section schematic view of a distal end sleeve pipe in a laser ablation catheter device provided by the embodiment of the utility model;
[0024] Figure 4 It is a plane schematic view of a fiber bundle assembly in a laser ablation catheter device provided by the embodiment of the utility model;
[0025] Figure 5 It is a horizontal section schematic view of a fiber bundle assembly in a laser ablation catheter device provided by the embodiment of the utility model. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.
[0027] It should be noted that the terms "arrangement", "connection" should be understood broadly, for example, it can be directly arranged, connected, or indirectly arranged, connected through a centering component, a centering structure.
[0028] In addition, in the embodiments of the utility model, the terms indicating the orientation or positional relationship such as "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" are based on the orientation or positional relationship shown in the drawings or the conventional placement state or use state, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated structure, feature, device or element must have a specific orientation or positional relationship, nor must be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0029] In the field of medical devices, the position close to the operator is usually defined as the proximal end, and the position away from the operator is defined as the distal end, the radial direction refers to the direction along the diameter or radius, the axial direction refers to the direction along the central axis, the radial direction and the axial direction are perpendicular to each other, and the circumferential direction refers to the circumferential direction around the central axis. Unless otherwise defined, all technical and scientific terms used in the utility model have the same meaning as understood by those skilled in the art to which the utility model belongs. The conventional terms used in the specification of the utility model are only for the purpose of describing the specific embodiments, and cannot be understood as a limitation on the utility model.
[0030] In addition, the description of "first", "second", etc. in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.
[0031] In the specific embodiments, various specific technical features and embodiments described in the specific embodiments can be combined in any appropriate manner without contradiction, for example, different specific technical features / embodiments can form different embodiments by combination. In order to avoid unnecessary repetition, various possible combinations of various specific technical features / embodiments in the present application will not be described again. Some embodiments of the present application will be described below with reference to the accompanying drawings. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.
[0032] Please refer to Figures 1 to 3The utility model provides a kind of laser ablation catheter device, including laser catheter, handle 400 and connect to the distal sleeve 410 of the handle 400, the handle 400 has ablation optical fiber lumen proximal inlet 450, the laser catheter passes through the ablation optical fiber lumen proximal inlet 450 and passes out the distal sleeve 410, first catheter 110, second catheter 120 and third catheter 130 are provided in the distal sleeve 410, the first catheter 110, second catheter 120 are arranged in the third catheter 130, and ablation optical fiber 310 is arranged between the third catheter 130 and the distal sleeve 410.The first catheter 110 is opened with first lumen 101, the second catheter 120 is opened with second lumen 102, and the cavity except the first lumen 101 and the second lumen 102 in the lumen of third catheter 130 is third lumen 103;First lumen 101 is used to place imaging catheter probe;The second lumen 102 is used for wire passage;The third lumen 103 is suction cavity, without opening separate suction cavity, avoid the diameter of laser catheter, distal sleeve 410 too big and affect use, by utilizing the cavity (i.e. third lumen 103) except first lumen 101 and second lumen 102 in the lumen of third catheter 130 as suction cavity, the diameter of laser catheter can be designed smaller, and suction effect is good, improve the efficiency of the small particles generated after ablation being flushed and being carried away by suction cavity, not easy to block, and imaging catheter probe can be set in first catheter 110, assist the ablation in laser ablation during real-time imaging in blood vessel, to judge whether ablation laser is directly acted on blood vessel wall by image, can effectively reduce the risk of ablation laser acting on blood vessel wall and causing damage to blood vessel, effectively improve the safety during ablation, and reliability is good.
[0033] Specifically, the diameter of the first lumen 101 can be greater than the diameter of the second lumen 102;The position of the first lumen 101 and the second lumen 102 in the third catheter 130 is eccentrically arranged, the first catheter 110 and the second catheter 120 are tangent, and the first catheter 110 and the second catheter 120 are inscribed in the third catheter 130, which has good structural stability, and the third lumen 103 will not be extruded and blocked when the laser catheter is bent, and has good reliability.
[0034] Specifically, the laser ablation catheter device includes an imaging catheter probe, which comprises an illumination fiber and an imaging module (imaging catheter system). The imaging module can be a video imaging catheter probe, an optical coherence tomography (OCT) probe, or an intravascular ultrasound (IVUS) probe. Through the handle 400 and the distal cannula 410 (multi-instrument inner tube), it can be compatible with other medical imaging catheter systems besides the video imaging catheter probe. The imaging catheter probe can be an OCT or IVUS catheter, inserted into the lumen of the multi-instrument inner tube, serving as an integrated laser ablation catheter system combining laser ablation and medical imaging, simplifying the switching between the imaging catheter and the ablation catheter during ablation. By using the imaging catheter system to assist in real-time imaging of the ablation process within the blood vessel during laser ablation, the system can determine whether the ablation laser is directly acting on the vessel wall, effectively reducing the risk of damage to the vessel wall caused by the ablation laser and significantly improving safety during ablation. The imaging module assists in real-time imaging of the ablation process within blood vessels during laser ablation, allowing for the determination of whether the ablation laser has acted on calcified tissue lesions, thrombi, and chronic occlusive lesions within the blood vessels. This improves the efficiency of laser ablation and enhances its practicality.
[0035] Specifically, the handle 400 is provided with a guidewire lumen proximal inlet 430 for guidewire insertion and a suction lumen proximal inlet 440 for connecting an external suction device; the second lumen 102 is connected to the guidewire lumen proximal inlet 430; and the suction lumen proximal inlet 440 is connected to the third lumen 103. The external suction device may be a suction bag or other suction-related component.
[0036] Specifically, the laser conduit includes a laser ablation conductor for transmitting laser light to the ablation fiber 310. The laser ablation conductor includes a single fiber or a bundle of fibers composed of multiple ultraviolet multimode fibers.
[0037] Or, such as Figure 4 , Figure 5 As shown, the laser ablation conductor is an optical fiber bundler assembly, which includes a first optical fiber 4 and multiple second optical fibers 9. The core diameter of the first optical fiber 4 is larger than that of the second optical fibers 9, i.e., the first optical fiber 4 acts as a large-core fiber, and the second optical fibers 9 act as small-core fibers, so that the laser energy in a single first optical fiber 4 is transmitted to multiple second optical fibers 9. Each second optical fiber 9 forms a bundled input fiber 5, which is fused to the first optical fiber 4. In specific applications, the bundled input fiber 5 can be coaxially connected to the first optical fiber 4 to facilitate the smooth passage of the optical fiber bundler assembly through the conduit.
[0038] The fiber combiner assembly comprises a tapering combiner fiber 6, two ends of the tapering combiner fiber 6 are a first end and a second end respectively, the diameter of the first end is smaller than the diameter of the second end, the first end is connected to the combiner input fiber 5, and the second end is connected to the combiner output fiber 7, which can be used as an ablation fiber 310; in specific applications, the tapering combiner fiber 6 can be connected to the combiner input fiber 5 and the combiner output fiber 7 by laser welding or other methods. A plurality of second fibers 9 are sleeved in the sleeve (quartz capillary tube 8) to form the combiner input fiber 5, which has compact structure and good reliability. The second fibers 9 in the combiner input fiber 5 are fused to the first fiber 4.
[0039] Specifically, the diameters of the two ends of the fiber combiner assembly can also be the same, a plurality of second fibers 9 sleeved in the sleeve form the combiner input fiber 5, and the combiner input fiber 5 is fused to the first fiber 4. The fiber combiner assembly with the same diameter of the two ends is connected to the large-core fiber (first fiber 4) by fusion, so that the conductor can more effectively conduct laser energy, thereby improving the ablation treatment effect.
[0040] Specifically, the second fibers 9 in the combiner input fiber 5 are arranged in a honeycomb / hexagonal shape, and the second fibers 9 on the outer layer of the combiner input fiber 5 are all inscribed in the sleeve.
[0041] Specifically, the cross section of each second fiber 9 is circular, the second fiber 9 is provided with at least 7 second fibers 9, each second fiber 9 is arranged in a honeycomb shape, each second fiber 9 is tangent to the adjacent second fiber 9, and each second fiber 9 is arranged in at least two layers, and in specific applications, each second fiber 9 can also be arranged in at least three layers.
[0042] Specifically, the tapering combiner fiber 6 is sleeved in the quartz capillary tube 8, effectively transmitting laser energy from a single first fiber (large-core quartz fiber) 4 to a plurality of second fibers (small-core quartz fibers) 9, and the core diameter of the second fiber (small-core quartz fiber) 9 is less than 200 μm. The fiber bundle composed of a plurality of second fibers (small-core quartz fibers) 9 includes an input end (combiner input fiber 5), a tapering end (tapering combiner fiber 6), and an output end (combiner output fiber 7 in a ring shape), wherein the diameters of the two ends of the tapering end are different, the large end of the tapering end is connected to the output end, the small end of the tapering end is connected to the input end, the tapering end and the input end are located in the front end of the quartz capillary tube 8, and the output end is located in the rear end of the quartz capillary tube 8 and extends out of the quartz capillary tube 8.
[0043] Specifically, the front end of the third catheter 130 is connected with a catheter distal end inner tube 140; the ablation optical fibers are arranged with one or at least two layers of ablation optical fiber layers (clustered output optical fibers 7) in the circumference, which are coated outside the third catheter 130 and the catheter distal end inner tube 140. The ablation optical fibers 310 reach the catheter distal end 411 from the catheter proximal end connector 470 through the ablation optical fiber lumen proximal end entrance 450.
[0044] Specifically, the distal end of the distal end sleeve 410 is provided with a developing element 220, which can be a metal ring, coated outside the ablation optical fiber layer and the catheter distal end inner tube 140, which is used for developing function to determine the position of the catheter distal end 411.
[0045] In specific applications, the effective energy density of the ultraviolet laser ablation system needs to reach 30-70mJ / mm 2 For the high peak value energy of the pulse width nanosecond 355nm ultraviolet laser, the small core diameter fiber is used as the transmission body of the catheter, which is soft and has a smaller bending radius, and can be applied to intravascular laser ablation. In the embodiment, the fiber combiner is used as the final transmission body, and the front end can be a single large core diameter fiber, which is better to conduct the uniformed laser energy to the small core diameter fiber (second optical fiber 9), and avoid directly damaging the end face of the multi-beam fiber.
[0046] Specifically, the ablation optical fibers can be a single large core diameter fiber (first optical fiber 4), or a fiber bundle composed of multiple ultraviolet multimode fibers. The single large core diameter fiber has high structural strength and is not easy to break during use; while the ultraviolet multimode fiber used in the fiber bundle can effectively ensure the stability of its working performance, each has its own advantages, and can be selected according to the actual situation.
[0047] Specifically, the imaging catheter probe is placed at the distal end 411 of the catheter, and the proximal inlet 420 of the multi-instrument lumen is arranged inside the shell of the tree-shaped handle 400. The first lumen 101 can be connected to the proximal inlet 420 of the multi-instrument lumen, and the catheter probe can be extended into the first catheter 110 from the proximal inlet 420 of the multi-instrument lumen, so that the imaging catheter is connected with the imaging engine to complete the setting of the imaging function. The imaging catheter probe is arranged at the distal end of the first catheter 110, and can include an illumination optical fiber and an imaging module for forming real-time imaging. The proximal inlet 430 of the guide wire lumen is used for the guide wire to pass through; the shell of the handle 400 is also provided with a proximal inlet 440 of a suction lumen, which can be connected with an external pressurized bag to complete the suction function; the ablation optical fiber 310 reaches the distal end of the catheter from the proximal connector of the catheter through the proximal inlet 450 of the ablation optical fiber lumen. The proximal connector is connected to the imaging probe located at the distal end of the catheter and occupies the first lumen 101 of the catheter. In specific applications, the ablation optical fiber 310 can be coated on the outer layer of the third catheter 130 and the inner tube 140 of the distal end of the catheter by an adhesive and fixed together with the metal ring (developing element 220). The ablation optical fiber 310 can be arranged in multiple layers in a ring shape around the outer periphery of the inner tube 140 of the distal end of the catheter, so as to realize the function of intravascular laser ablation therapy. The second catheter 120 is arranged between the proximal inlet 430 of the guide wire lumen and the distal outlet of the second lumen 102 (guide wire lumen), and the proximal inlet of the guide wire lumen is located at the inlet of the distal sleeve 410. The position of the distal outlet of the guide wire lumen is close to the position of the imaging catheter probe. Preferably, the distance from the proximal inlet 430 of the guide wire lumen to the distal outlet of the guide wire lumen (the second lumen 102) is 150-250 cm. Preferably, the outer diameter of the distal sleeve 410 is 0.9-2.8 mm, which is suitable for percutaneous coronary intervention. Preferably, the imaging module is an optical coherence tomography (OCT) or intravascular ultrasound (IVUS) catheter, which is introduced into the first lumen 101 of the first catheter 110 to realize real-time scanning imaging.
[0048] In specific applications, the lumen of the laser catheter includes an ablation optical fiber 310 and a guide wire. The ablation optical fiber 310 is used to transmit a target energy density, and the guide wire can be used to guide the front end of the laser catheter to a specified position in the blood vessel by controlling the guide wire. The diameter of the ablation optical fiber 310 is smaller than the diameter of the guide wire, and the ablation optical fiber 310 and the guide wire are arranged in a non-coaxial manner in the lumen of the third catheter 130, i.e. the ablation optical fiber 310 is arranged eccentrically relative to the guide wire in the lumen of the catheter. The core diameter of the ablation optical fiber 310 is less than 100 μm, and the numerical aperture ranges from 0.12 to 0.50, which effectively enlarges the laser ablation treatment area.
[0049] In this embodiment, the conductor includes a fiber combiner that connects a large core quartz optical fiber to a combiner optical fiber by fusion splicing, and the combiner optical fiber is covered in a quartz glass tube, effectively transmitting laser energy from a single large core optical fiber (fiber core diameter range can be above 600 μm) to multiple small core optical fibers (fiber core diameter range can be below 100 μm). The optical fiber bundle is composed of multiple optical fibers, and the small core optical fibers include input ends and output ends.
[0050] During the ablation operation of the lesion tissue in the blood vessel assisted by the image catheter system, the distal end of the laser catheter is guided to the lesion tissue position in the blood vessel by controlling the guide wire; then, the lesion tissue is ablated by the ablation optical fiber 310, while the imaging catheter shuttles in the cavity of the catheter distal end inner tube 140 and the imaging catheter probe reaches the imaging position (the distal end face of the catheter), so as to realize real-time imaging of the situation in the blood vessel and the ablation situation, and then it can be judged according to the imaging image whether the ablation optical fiber 310 acts on the blood vessel wall or not; if the ablation optical fiber 310 does not act on the blood vessel wall, the ablation is continued; if the ablation optical fiber 310 acts on the blood vessel wall, the ablation is stopped; in this way, the risk of the ablation optical fiber 310 acting on the blood vessel wall and causing damage to the blood vessel wall can be effectively reduced, the safety during ablation is effectively improved, and then through the additional sheath tube, the physiological saline is flushed to the distal end of the catheter during laser ablation, so as to realize real-time imaging of the situation in the blood vessel and the ablation situation, and the large-area suction lumen (the third lumen 103) effectively guarantees and improves the applicability of the imageable laser ablation catheter.
[0051] The utility model also provides a kind of laser ablation system, including laser, still including above-mentioned laser ablation catheter device, laser ablation catheter device can be connected in laser, and fiber combiner assembly is set on the light path of laser.The specific laser ablation catheter device further includes light uniformity component, and the fiber combiner assembly is set on the light path of the light uniformity component.Light uniformity component is used to carry out beam flat top shaping or / and beam superposition to the laser emitted by laser.
[0052] Specifically, the light uniformity component includes a microlens group and a focusing lens, which are sequentially arranged along the light path of the laser. The microlens group is arranged on the exit light path of the laser for shaping the laser to obtain a shaped beam. The focusing lens is arranged on the exit light path of the shaped beam. The focusing lens can be a plano-convex lens or a biconvex lens.
[0053] The utility model provides a kind of laser ablation catheter device, ablation system, it does not need to open separate suction cavity, utilize the cavity of the inner cavity of third catheter 130 except first lumen 101 and second lumen 102 as suction cavity, suction effect is good, improve the efficiency of the small particles generated after ablation being washed and being taken away by suction cavity, suction cavity is not easy to block, and can be imaged catheter probe, assist the ablation situation in blood vessel during laser ablation to carry out real-time imaging, to judge whether ablation laser is directly acted on the blood vessel wall by image, can effectively reduce the ablation laser to be acted on the blood vessel wall and cause damage risk to blood vessel, effectively improve the safety during ablation, reliability is good.
[0054] Those skilled in the art of the present technology should realize that the above embodiments are only used to illustrate the utility model, and are not used as a limitation on the utility model, and as long as the above embodiments are appropriately changed and changed within the essential spirit range of the utility model, it falls within the scope of the utility model.
Claims
1. A laser ablation catheter device, characterized by, The laser ablation catheter device comprises a laser catheter, a handle and a distal sleeve connected to the handle, the handle has an ablation optical fiber lumen proximal inlet, the laser catheter passes through the ablation optical fiber lumen proximal inlet and out of the distal sleeve, the distal sleeve is provided with a first catheter, a second catheter and a third catheter, the first catheter and the second catheter are arranged in the third catheter, and an ablation optical fiber is arranged between the third catheter and the distal sleeve; the first catheter is provided with a first lumen, the second catheter is provided with a second lumen, and the cavity in the third catheter lumen except the first lumen and the second lumen is a third lumen; The first lumen is used for placing an imaging catheter probe; the second lumen is used for passing a guide wire; and the third lumen is a suction cavity, and the ablation optical fiber is arranged between the third catheter and the distal sleeve.
2. The laser ablation catheter device of claim 1, wherein, The diameter of the first lumen is greater than the diameter of the second lumen; the positions of the first lumen and the second lumen in the third catheter are eccentric; the first catheter and the second catheter are tangent to each other; and the first catheter and the second catheter are both inscribed in the third catheter.
3. The laser ablation catheter device of claim 1, wherein, The laser ablation catheter device comprises an imaging catheter probe, the imaging catheter probe comprises an illumination optical fiber and an imaging module; and the imaging module is a video imaging catheter probe, an optical coherence tomography probe or an intravascular ultrasound probe.
4. The laser ablation catheter device of claim 1, wherein, The handle is provided with a guide wire lumen proximal inlet for the guide wire to extend into and a suction lumen proximal inlet for connecting an external suction device; the second lumen is communicated with the guide wire lumen proximal inlet; and the suction lumen proximal inlet is communicated with the third lumen.
5. The laser ablation catheter device of any one of claims 1 to 4, wherein, The laser ablation catheter device comprises a laser ablation conductor connected to the ablation optical fiber for conducting laser to the ablation optical fiber; The laser ablation conductor comprises a single optical fiber or a plurality of optical fiber bundles composed of ultraviolet multimode optical fibers; or the laser ablation conductor is a fiber bundle assembly, the fiber bundle assembly comprises a first optical fiber and a plurality of second optical fibers, the core diameter of the first optical fiber is greater than the core diameter of the second optical fibers, each of the second optical fibers forms a bundle input optical fiber, and the bundle input optical fiber is fused to the first optical fiber.
6. The laser ablation catheter device of claim 5, wherein, The fiber bundle assembly further comprises a tapered bundle fiber, two ends of the tapered bundle fiber are a first end and a second end respectively, the diameter of the first end is smaller than the diameter of the second end, the first end is connected to the bundle input optical fiber, and the second end is connected to a bundle output optical fiber which is the ablation optical fiber.
7. The laser ablation catheter device of claim 5, wherein, The fiber bundle assembly has the same diameter at both ends, a plurality of second optical fibers wrapped in a sleeve form a bundle input optical fiber, and the bundle input optical fiber is fused to the first optical fiber; Each of the second optical fibers in the bundle input optical fiber is arranged in a honeycomb / hexagonal shape, and each of the second optical fibers on the outer layer of the bundle input optical fiber is inscribed in the sleeve.
8. The laser ablation catheter device of claim 5, wherein, The cross section of each of the second optical fibers is circular, the second optical fibers are provided in at least 7, each of the second optical fibers is arranged in a honeycomb shape, each of the second optical fibers is tangent to the adjacent second optical fiber, and each of the second optical fibers is arranged in at least two layers.
9. The laser ablation catheter device of claim 5, wherein, The front end of the third catheter is connected with a catheter distal end inner tube; the ablation optical fiber forms an ablation optical fiber layer, which is coated on the outer layer of the third catheter and the catheter distal end inner tube; The distal end of the distal end sleeve is provided with a developing member.
10. A laser ablation system comprising a laser, characterized in that, Also included is a laser ablation catheter device as claimed in any one of claims 1 to 9, which is connected to the laser.