Laser surgical catheter

Abstract

The invention discloses a laser operation catheter which comprises an outer sleeve with a first opening, an inner sleeve which is arranged in the outer sleeve in a penetrating mode and can move in the axial direction of the outer sleeve, an optical fiber which is arranged in the inner sleeve in a penetrating mode and can move in the axial direction of the inner sleeve, and at least two supporting claws. All the supporting claws are arranged at intervals in the circumferential direction of the inner sleeve and connected to the side, close to the first opening, of the inner sleeve, each supporting claw is provided with a supporting protrusion, all the supporting protrusions jointly define a supporting channel, and the diameter of the largest inscribed circle of the supporting channel is smaller than that of the optical fiber. According to the laser operation catheter, the optical fiber can be used for pushing the supporting claws to abut against the inner wall of the tube wall of a patient so as to be fixed relative to the tube wall of the patient, the optical fiber can be clamped through the supporting protrusions so that the optical fiber can be accurately aligned with a blocking object, and therefore the blocking object in the tube wall of the patient can be reliably removed; the risk that the tube wall of a patient is damaged due to the fact that laser irradiates the tube wall of the patient is reduced, and the reliability of the laser operation catheter is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a laser surgery catheter. Background Art

[0002] Fallopian tube obstruction has become a major cause of infertility. Among the current treatment options for fallopian tube obstruction, laser-induced cavitation therapy offers significant advantages and effectiveness. Laser energy is transmitted via optical fiber to the vicinity of the obstruction, inducing localized cavitation. When the cavitation bubbles collapse, they generate powerful shock waves and microjets, effectively removing the obstruction. Similar treatments have also been used to treat kidney and urinary stones, demonstrating their effectiveness.

[0003] However, since the fallopian tube structure is a long and narrow tubular muscle tissue and the fallopian tube wall is covered with finely structured cilia, when this scheme is used to treat fallopian tube obstruction, the soft changes in the tissue structure will cause the internal cavity to narrow and twist, and the laser energy will irradiate the surrounding tube wall tissue, or the shock wave jet generated by the cavitation bubble will deviate from the diseased tissue. Therefore, a fixing device is needed that can fix the optical fiber in the center of the fallopian tube and provide a certain support to the fallopian tube wall, thereby avoiding damage to the fallopian tube wall when the cavitation bubble collapses. Summary of the Invention

[0004] The present invention aims to address at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a laser surgical catheter that utilizes an optical fiber to push a support claw against the inner wall of a patient's tube, thereby securing the catheter relative to the patient's tube wall. Furthermore, the support protrusions clamp the optical fiber, allowing the optical fiber to be more accurately aligned with the obstruction, thereby reliably removing the obstruction from the patient's tube wall, reducing the risk of damage to the patient's tube wall caused by laser irradiation, and improving the reliability of the laser surgical catheter.

[0005] According to an embodiment of the present invention, a laser surgical catheter includes: an outer sleeve having a first channel, wherein the first channel has a first opening at one end in the axial direction of the outer sleeve; an inner sleeve having a second channel and being movably arranged in the first channel along the axial direction of the outer sleeve; an optical fiber being movably arranged in the second channel along the axial direction of the outer sleeve; at least two support claws, all of which are arranged at intervals along the circumference of the inner sleeve and are connected to the side of the inner sleeve close to the first opening, each of the support claws has a support protrusion on the side facing the second channel, and all of the support protrusions jointly define a support channel, and the diameter of the largest inscribed circle of the support channel is smaller than the diameter of the optical fiber, so that the optical fiber squeezes the support claw toward the radial outside of the inner sleeve to expand when passing through the support channel; wherein the inner sleeve is used to drive the support claw to extend out of the first channel and drive the support claw to retract into the first channel.

[0006] According to the laser surgical catheter of the present invention, a plurality of support claws are arranged at circumferential intervals along the inner sleeve, and the support protrusions of the plurality of support claws are used to define a support channel with a diameter smaller than the diameter of the optical fiber. When the laser surgical catheter is used for laser-induced cavitation therapy, when the front end of the laser surgical catheter reaches a preset position, the inner sleeve can be driven toward the first opening to push the support claws out of the first channel, and then the optical fiber is pushed through the support channel. The optical fiber is used to push the support claws against the inner wall of the patient's tube wall to fix it relative to the patient's tube wall, and the support protrusions are used to clamp the optical fiber so that the optical fiber can be more accurately aligned with the obstruction, thereby reliably removing the obstruction in the patient's tube wall, reducing the risk of damage to the patient's tube wall caused by laser irradiation, and improving the reliability of the laser surgical catheter.

[0007] According to some embodiments of the present invention, the support claw includes a first support arm and a second support arm connected along the axial direction of the outer sleeve, the first support arm is connected between the second support arm and the inner sleeve, and in the direction away from the inner sleeve, the first support arm extends obliquely toward the radial inner side of the second channel, and the second support arm extends obliquely toward the radial outer side of the second channel.

[0008] In some embodiments of the present invention, part of the support claw is arranged in the second channel and is connected to the radial inner surface of the inner sleeve, and the inner sleeve has a first movement position and a second movement position relative to the outer sleeve, in the first movement position, the support claw is completely retracted into the first channel; in the second movement position, the second support arm extends out of the first channel; the optical fiber has a third movement position and a fourth movement position relative to the inner sleeve, in the third movement position, the optical fiber is located on the side of the support protrusion close to the inner sleeve; in the fourth movement position, the optical fiber is passed through the support channel, and the head of the optical fiber is located on the side of the free end of the second support arm close to the inner sleeve, and the first support arm is stopped against the radial inner surface of the inner sleeve.

[0009] In some embodiments of the present invention, the first support arm includes a limiting section and a first protruding section, the limiting section is connected between the inner sleeve and the first protruding section, the first protruding section is connected to the second support arm, and in the direction away from the inner sleeve, the first protruding section extends obliquely toward the radial inner side of the second channel; when the optical fiber is in the fourth movement position, the limiting section stops at the radial inner surface of the inner sleeve, and the first protruding section extends out of the first channel.

[0010] According to some other embodiments of the present invention, in a direction away from the inner sleeve, a size of the first support arm in a radial direction of the inner sleeve gradually increases.

[0011] According to some further embodiments of the present invention, the second support arm includes a second protruding section and a supporting section, the second protruding section is connected between the supporting section and the first support arm, and in a direction away from the inner sleeve, the second protruding section extends obliquely toward the radially outer side of the second channel, and the supporting section extends axially along the outer sleeve.

[0012] According to some optional embodiments of the present invention, the inner sleeve includes a front end section and a main body section which are arranged along its axial direction and are detachably connected, and the supporting claw is connected to the front end section.

[0013] According to some optional embodiments of the present invention, in a direction away from the inner sleeve, all of the supporting claws are arranged outside the second channel and connected to the end surface of the inner sleeve in the axial direction.

[0014] According to some other optional embodiments of the present invention, there are at least three supporting claws, and on the cross section of the inner sleeve, a triangle formed by connecting at least three supporting claws is an acute-angled triangle.

[0015] According to some specific embodiments of the present invention, the supporting claw is a polytetrafluoroethylene part; or, the supporting claw is a stainless steel part.

[0016] According to some specific embodiments of the present invention, the outer sleeve is made of polyvinyl chloride.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0019] Figure 1 is a schematic diagram of a laser surgical catheter according to some embodiments of the present invention, wherein the inner cannula is in a second movement position and the optical fiber is in a fourth movement position;

[0020] Figure 2 yes Figure 1 Schematic diagram of a laser surgical catheter in which the inner cannula is in a second movement position and the optical fiber is hidden;

[0021] Figure 3 yes Figure 1 Schematic diagram of the laser surgical catheter, wherein the inner cannula is in a first movement position and the optical fiber is hidden;

[0022] Figure 4 yes Figure 1 A schematic diagram of the structure when the inner sleeve and the supporting claw are connected together;

[0023] Figure 5 yes Figure 1 Schematic diagram of the structure of the supporting claw.

[0024] Reference numerals:

[0025] 100. Laser surgical catheter;

[0026] 1. outer sleeve; 11. first passage; 12. first opening;

[0027] 2. Inner casing; 21. Second channel;

[0028] 3. Support claw; 31. Support protrusion; 32. Support channel; 33. First support arm; 331. Limiting section; 332. First protruding section; 34. Second support arm; 341. Second protruding section; 342. Support section;

[0029] 4. Fiber optic. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0031] The laser surgery catheter 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0032] Reference Figure 1-Figure 5 According to an embodiment of the present invention, a laser surgical catheter 100 includes: an outer sleeve 1, an inner sleeve 2 and a support claw 3. The outer sleeve 1 has a first channel 11, and the first channel 11 has a first opening 12 at one end in the axial direction of the outer sleeve 1; the inner sleeve 2 has a second channel 21, and the inner sleeve 2 is inserted into the first channel 11. The inner sleeve 2 can move along the axial direction of the outer sleeve 1, that is, the inner sleeve 2 can move relative to the outer sleeve 1 in its axial direction; that is, the inner sleeve 2 and the outer sleeve 1 are clearance-fitted, and the inner diameter of the outer sleeve 1 is larger than the outer diameter of the inner sleeve 2. Specifically, the difference between the inner diameter of the outer sleeve 1 and the outer diameter of the inner sleeve 2 is greater than or equal to 0.1 mm and less than or equal to 10 mm.

[0033] Reference Figure 1 The optical fiber 4 is passed through the second channel 21 and is movable along the axial direction of the outer sleeve 1; for example, the device for laser-induced cavitation therapy has a laser emitting device, and the end of the optical fiber 4 away from the first opening 12 is connected to the output port of the laser emitting device to guide the laser emitted by the laser emitting device to its end close to the first opening 12.

[0034] Reference Figures 1-4 There are at least two support claws 3. For example, there can be two, three, four, five, six, or more support claws 3. All support claws 3 are spaced apart along the circumference of the inner sleeve 2, that is, all support claws 3 are arranged in a ring shape and adjacent two support claws are spaced apart in the arrangement direction. For example, all support claws 3 can be evenly spaced apart, that is, the spacing between any two adjacent support claws 3 in the arrangement direction is the same.

[0035] All support claws 3 are connected to the side of the inner sleeve 2 near the first opening 12. For example, the support claws 3 can be connected to the inner sleeve 2 via rivets or bolts, or the support claws 3 can be integrally formed with the inner sleeve 2. For example, the support claws 3 can be connected to the end of the inner sleeve 2 near the first opening 12, or the support claws 3 can be partially disposed within the second channel 21 and connected to the radial inner surface of the inner sleeve 2.

[0036] Each supporting claw 3 is provided with a supporting protrusion 31 on the side facing the second channel 21, and all the supporting protrusions 31 jointly define a supporting channel 32. The diameter of the largest inscribed circle of the supporting channel 32 is smaller than the diameter of the optical fiber 4, so that the supporting claw 3 is squeezed to expand radially outward of the inner sleeve 2 when the optical fiber 4 passes through the supporting channel 32; that is, when the optical fiber 4 extends into the supporting channel 32, the optical fiber 4 and the supporting protrusion 31 stop in the radial direction of the inner sleeve 2.

[0037] The inner sleeve 2 is used to drive the supporting claw 3 to extend out of the first channel 11 and to drive the supporting claw 3 to retract into the first channel 11 .

[0038] When the laser surgical catheter 100 reaches a preset position, the inner sleeve 2 can be driven to move toward the first opening 12 to push the support claw 3 out of the first channel 11, and then the optical fiber 4 can be pushed through the support channel 32. The optical fiber 4 is used to squeeze the support claw 3 toward the radially outer side of the inner sleeve 2 to expand, and the support claw 3 is pushed to stop at the inner wall of the patient's tube wall (wherein the patient's tube wall can be the wall of the fallopian tube, the wall of the ureter or the wall of the blood vessel) to fix the support claw 3 relative to the patient's tube wall, so that the support claw 3 can play a certain protective role on the patient's tube wall, reduce the risk of damage to the patient's tube wall caused by shock waves or microjets generated by the collapse of cavitation bubbles, improve the reliability of the laser surgical catheter 100, and improve the safety of laser-induced cavitation bubble treatment surgery.

[0039] At the same time, when the optical fiber 4 squeezes the support claw 3 to expand radially outward from the inner sleeve 2, the support protrusion 31 can form a clamping effect on the optical fiber 4, so that the head of the optical fiber 4 can be roughly located at the center of the support channel 32, so that the head of the optical fiber 4 can be roughly located at the center of multiple support claws 3, so that the head of the optical fiber 4 can be roughly located at the center of the patient's tube wall, so that the laser energy can be reliably transmitted to the vicinity of the obstruction through the optical fiber 4, so that the shock wave or microjets generated by the collapse of cavitation bubbles can act on the obstruction more accurately, thereby removing the obstruction, reducing the risk of damage to the patient's tube wall caused by the shock wave or microjets generated by the collapse of cavitation bubbles, improving the reliability of the laser surgical catheter 100, and improving the safety of laser-induced cavitation bubble treatment surgery.

[0040] It should be understood that, in order to prevent the head of the optical fiber 4 from extending too far out of the support channel 32 and thereby losing the support of the support protrusion 31, the distance between the head of the optical fiber 4 and the position where the support protrusion 31 abuts on the optical fiber 4 should be kept short. For example, after the head of the optical fiber 4 is pushed through the support channel 32, it is not necessary to continue pushing, or the optical fiber 4 is only pushed a short distance. However, in order to ensure that the laser energy transmitted through the optical fiber 4 can reliably remove the obstruction, the head of the optical fiber 4 should be pushed as close to the obstruction as possible, that is, as far away from the position where the support protrusion 31 abuts on the optical fiber 4. Therefore, when actually pushing the optical fiber 4, the head of the optical fiber 4 can be pushed to a position that is roughly flush with the end of the support claw 3 away from the inner sleeve, so as to ensure that the head of the optical fiber 4 can be more reliably located at the center of the tube wall, while also ensuring that the laser energy transmitted through the optical fiber 4 can reliably remove the obstruction.

[0041] For example, in order to prevent the laser surgical catheter 100 from scratching the patient's tube wall, the angular structures of the outer sleeve 1, the inner sleeve 2 and the support claw 3 can be rounded. Specifically, the end surface of the support claw 3 in the axial direction of the outer sleeve 1 away from the inner sleeve 2 can be formed into a spherical shape, and its diameter can be set to be greater than or equal to 1 mm and less than or equal to 20 mm.

[0042] For example, when selecting materials, a relatively soft material can be selected to make the outer tube 1 to reduce the risk of the outer tube 1 scratching the patient's tube wall. Specifically, the outer tube 1 can be a polyvinyl chloride member.

[0043] According to the laser surgical catheter 100 of the present invention, a plurality of support claws 3 are arranged at intervals along the circumference of the inner sleeve 2, and the support protrusions 31 of the plurality of support claws 3 are used to define a support channel 32 having a diameter smaller than the diameter of the optical fiber 4. When the laser surgical catheter 100 is used for laser-induced cavitation therapy, when the front end of the laser surgical catheter 100 reaches a preset position, the inner sleeve 2 can be driven toward the first opening 12 to push the support claws 3 out of the first channel 11, and then the optical fiber 4 can be pushed through the support channel 32. The optical fiber 4 is used to push the support claws 3 to stop against the inner wall of the patient's tube wall to fix it relative to the patient's tube wall, and the support protrusions 31 are used to clamp the optical fiber 4 so that the optical fiber 4 can be more accurately aligned with the obstruction, thereby reliably removing the obstruction in the patient's tube wall, reducing the risk of damage to the patient's tube wall caused by laser irradiation, and improving the reliability of the laser surgical catheter 100.

[0044] Reference Figure 2-Figure 5According to some embodiments of the present invention, the support claw 3 includes a first support arm 33 and a second support arm 34. In the axial direction of the outer sleeve 1, the first support arm 33 is connected between the second support arm 34 and the inner sleeve 2. In the direction away from the inner sleeve 2, the first support arm 33 extends obliquely toward the radial inner side of the second channel 21, and the second support arm 34 extends obliquely toward the radial outer side of the second channel 21. That is, the first support arm 33 and the second support arm 34 extend in opposite directions in the radial direction of the second channel 21. The first support arm 33 and the second support arm 34 form an angled structure that protrudes toward the radial inner side of the second channel 21. The support protrusion 31 includes a portion of the first support arm 33 and a portion of the second support arm 34.

[0045] By setting the first support arm 33 to extend obliquely toward the radial inner side of the second channel 21 in the direction away from the inner sleeve 2, when the optical fiber moves from the third movement position toward the fourth movement position, the first support arm 33 can guide the optical fiber 4, so that the optical fiber 4 can reliably penetrate into the support channel 32 along the guidance of the first support arm 33.

[0046] By setting the second support arm 34 to extend obliquely toward the radial outside of the second channel 21 in the direction away from the inner sleeve 2, when the support claw 3 is retracted into the first channel 11, the tube wall at the first opening 12 of the outer sleeve 1 can slide relative to the second support claw 3, gradually squeezing the second support arm 34 toward the radial inside of the second channel 21, so that the second support arm 34 can be reliably received in the first channel 11.

[0047] At the same time, the first support arm 33 and the second support arm 34 are arranged to extend in opposite directions in the radial direction of the second channel 21, so that the first support arm 33 and the second support arm 34 can form an angle gap in the direction away from the second channel 21, so that the support claw 3 has a certain deformation space, which facilitates the clamping of the optical fiber 4 by the support claw 3 when the optical fiber 4 passes through the support channel 32, and the structure is simple and reliable.

[0048] Reference Figures 1-4 In some embodiments of the present invention, part of the support claw 3 is disposed in the second channel 21, and the support claw 3 is connected to the radial inner surface of the inner sleeve 2. The inner sleeve 2 has a first movement position and a second movement position relative to the outer sleeve 1. Figure 3 In the first movement position, the supporting claw 3 is completely retracted into the first channel 11; Figure 1 and Figure 2 In the second movement position, the second support arm 34 extends out of the first channel 11; for example, in the second movement position, the first support arm 33 may not extend out of the first channel 11, or the first support arm 33 may only partially extend out of the first channel 11.

[0049] Reference Figure 1 The optical fiber 4 has a third and fourth movement positions relative to the inner sleeve 2. In the third movement position, the optical fiber 4 is located on the side of the support protrusion 31 close to the inner sleeve 2. In the fourth movement position, the optical fiber 4 is inserted into the support channel 32, and the head of the optical fiber 4 is located on the side of the free end of the second support arm 34 close to the inner sleeve 2. The first support arm 33 abuts against the radial inner surface of the inner sleeve 2; that is, the portion of the first support arm 33 located within the second channel 21 abuts against the inner surface of the inner sleeve 2, that is, the first support arm 33 abuts against the inner wall of the second channel 21.

[0050] It should be noted that the free end of the second support arm 34 refers to the end of the second support arm 34 that is not connected to the first support arm 33 in the axial direction of the outer sleeve 1, that is, the end of the second support arm 34 that is axially away from the first support arm 33 in the outer sleeve 1. The head of the optical fiber 4 refers to the end of the optical fiber 4 that is axially closer to the first opening 12 when in the third movement position.

[0051] By setting the first support arm 33 to abut against the radial inner surface of the inner sleeve 2 when the optical fiber 4 is passed through the support channel 32, the inner sleeve 2 can limit the first support arm 33. When the first support arm 33 abuts against the radial inner surface of the inner sleeve 2, only the second support arm 34 of the support claw 3 can expand toward the radial outside of the first channel 11, making it easier to calculate the distance that the second support arm 34 expands outward in the radial direction of the first channel 11.

[0052] Specifically, the axial distance that the first support arm 33 extends in the outer sleeve 1 is L1, the axial distance that the second support arm 34 extends in the outer sleeve 1 is L2, and the difference between the diameter of the largest inscribed circle of the support channel 32 and the diameter of the optical fiber 4 is Δx. In the fourth movement position, the distance that the second support arm 34 expands outward in the radial direction of the first channel 11 is ΔL, where ΔL=Δx(L1+L2) / L1.

[0053] Moreover, by setting the first support arm 33 to abut against the radial inner surface of the inner sleeve 2 when the optical fiber 4 is passed through the support channel 32, when the second support arm 34 abuts against the patient's tube wall, the second support arm 34 can be mutually limited with the inner sleeve 2 through the first support arm 33, so that the laser surgical catheter 100 is reliably fixed relative to the patient's tube wall.

[0054] Optionally, the support claws 3 may be disposed entirely within and outside the second channel 21, with the support claws 3 connected to the axial end surface of the inner cannula 2. When the second support arm 34 abuts against the patient's tube wall, the second support arm 34 and the outer cannula 1 are mutually restrained via the first support arm 33. The outer cannula 1 restrains the inner cannula 2, thereby reliably securing the laser surgical catheter 100 relative to the patient's tube wall.

[0055] Reference Figure 2-Figure 5 In some embodiments of the present invention, the first support arm 33 includes a limiting segment 331 and a first protruding segment 332. The limiting segment 331 is connected between the inner sleeve 2 and the first protruding segment 332. The first protruding segment 332 is connected to the second support arm 34. In a direction away from the inner sleeve 2, the first protruding segment 332 extends obliquely toward the radial inner side of the second channel 21.

[0056] When the optical fiber 4 is in the fourth movement position, the limiting section 331 abuts against the radial inner surface of the outer sleeve 1, that is, the surface of the limiting section 331 facing away from the second channel 21 abuts against the radial inner surface of the outer sleeve 1, and the first protrusion section 332 extends out of the first channel 11.

[0057] By setting the first protruding section 332 to extend out of the first channel 11, the first protruding section 332 can have a larger deformation space, so that the second support arm 34 has a larger expansion space in the radial direction of the outer tube 1, so that the second support arm 34 can reliably stop against the patient's tube wall, thereby improving the reliability of the laser surgical catheter 100.

[0058] Reference Figure 5 According to other embodiments of the present invention, the dimension of the first support arm 33 in the radial direction of the inner sleeve 2 gradually increases in the direction away from the inner sleeve 2. That is, in the axial direction of the outer sleeve 1, the dimension of the first support arm 33 at the end connected to the inner sleeve 2 in the radial direction of the inner sleeve 2 is the smallest. This facilitates the relative rotation of the first support arm 33 with respect to the inner sleeve 2. When the first support arm 33 abuts against the radial inner surface of the outer sleeve 1, the surface of the first support arm 33 facing the second channel 21 can be inclined and extended toward the radial inner side of the second channel 21 in the direction away from the inner sleeve 2, thereby guiding the movement of the optical fiber 4 from the third movement position to the fourth movement position, thereby realizing the guiding role of the support claw 3 in the movement of the optical fiber 4.

[0059] Reference Figure 2-Figure 5According to further embodiments of the present invention, the second support arm 34 includes a second protruding segment 341 and a supporting segment 342. The second protruding segment 341 is connected between the supporting segment 342 and the first support arm 33. In a direction away from the inner sleeve 2, the second protruding segment 341 extends obliquely toward the radially outward side of the second channel 21, and the supporting segment 342 extends axially along the outer sleeve 1. For example, the first protruding segment 332 and the second protruding segment 341 together constitute the supporting protrusion 31 of the supporting claw 3.

[0060] In this way, the surface of the support section 342 that is radially away from the first channel 11 of the outer sleeve 1 is roughly parallel to the patient's tube wall, so that the contact area between the support section 342 and the patient's tube wall is larger, and the purpose of reliably fixing the support claw 3 relative to the patient's tube wall is achieved, thereby improving the reliability of the laser surgical catheter 100.

[0061] Reference Figures 1-4 According to other optional embodiments of the present invention, there are at least three support claws 3, and in the cross-section of the inner cannula 2, the triangle formed by the at least three support claws 3 is an acute triangle. This allows the multiple support claws 3 to more reliably grip the optical fiber 4, allowing the optical fiber 4 to be securely fixed relative to the outer cannula 1 under the grip of the support claws 3, thereby improving the reliability of the laser surgical catheter 100.

[0062] According to some specific embodiments of the present invention, the support claw 3 is a polytetrafluoroethylene part; this allows the support claw 3 to have a certain degree of self-lubrication, so that the support claw 3 can be extended and retracted into the first channel 11 more reliably, reducing the damage caused by the support claw 3 to the patient's tube wall and improving the safety of laser-induced cavitation therapy surgery.

[0063] According to some specific embodiments of the present invention, the support claws 3 are made of stainless steel. This provides the support claws 3 with a high structural strength, allowing them to protect the patient's tube wall, effectively reducing or preventing the risk of shock waves or microjets generated by cavitation bubble collapse penetrating the support claws 3 and causing damage to the patient's tube wall, thereby improving the reliability of the laser surgical catheter 100. For example, when using the laser surgical catheter 100 to treat a patient's kidney stones, the support claws 3 can be made of stainless steel to ensure that they can withstand the impact energy generated by cavitation bubble collapse.

[0064] According to some optional embodiments of the present invention, the inner sleeve 2 includes a front end section and a main body section, which are arranged axially along the inner sleeve 2 and are detachably connected to the main body section. The support claw 3 is connected to the front end section. For example, the front end section and the main body section may be connected by a snap fastener or by a threaded connection.

[0065] With such a design, the front end section and the supporting claw 3 can be replaced as a whole, thereby achieving the purpose of replaceable material of the supporting claw 3; for example, when it is necessary to treat a patient's kidney stones, the front end section of the supporting claw 3 connected with a stainless steel material can be connected to the main body section; when it is necessary to treat a patient's fallopian tube obstruction, the front end section of the supporting claw 3 connected with a tetrafluoroethylene part can be connected to the main body section.

[0066] In the description of the present invention, it is to be understood that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0067] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A laser surgical catheter, characterized in that: include: An outer sleeve having a first passage, wherein the first passage has a first opening at one end of the outer sleeve in the axial direction; an inner sleeve having a second passage and being movably disposed in the first passage along the axial direction of the outer sleeve; an optical fiber, movably disposed in the second channel along the axial direction of the outer sleeve; at least two supporting claws, all of which are spaced apart along the circumference of the inner sleeve and connected to a side of the inner sleeve near the first opening, each of which has a supporting protrusion on a side facing the second channel, and all of which jointly define a supporting channel, wherein the diameter of the largest inscribed circle of the supporting channel is smaller than the diameter of the optical fiber, so that the optical fiber squeezes the supporting claws to expand radially outward of the inner sleeve when passing through the supporting channel; Wherein, the inner sleeve is used to drive the supporting claw to extend out of the first channel and drive the supporting claw to retract into the first channel.

2. The laser surgical catheter according to claim 1, characterized in that: The support claw includes a first support arm and a second support arm connected along the axial direction of the outer sleeve, the first support arm is connected between the second support arm and the inner sleeve, and in the direction away from the inner sleeve, the first support arm extends obliquely toward the radial inner side of the second channel, and the second support arm extends obliquely toward the radial outer side of the second channel.

3. The laser surgical catheter according to claim 2, characterized in that: Part of the support claw is disposed in the second channel and is connected to the radial inner surface of the inner sleeve. The inner sleeve has a first movement position and a second movement position relative to the outer sleeve. In the first movement position, the support claw is completely retracted into the first channel. In the second movement position, the second support arm extends out of the first channel; The optical fiber has a third movement position and a fourth movement position relative to the inner sleeve. In the third movement position, the optical fiber is located on the side of the support protrusion close to the inner sleeve; in the fourth movement position, the optical fiber is passed through the support channel, and the head of the optical fiber is located on the side of the free end of the second support arm close to the inner sleeve, and the first support arm abuts against the radial inner surface of the inner sleeve.

4. The laser surgical catheter according to claim 3, characterized in that: The first support arm includes a limiting section and a first protruding section, the limiting section is connected between the inner sleeve and the first protruding section, the first protruding section is connected to the second support arm, and in a direction away from the inner sleeve, the first protruding section extends obliquely toward the radial inner side of the second channel; When the optical fiber is in the fourth movement position, the limiting section abuts against the radial inner surface of the inner sleeve, and the first protruding section extends out of the first channel.

5. The laser surgery catheter according to claim 2, characterized in that: In a direction away from the inner sleeve, a dimension of the first supporting arm in a radial direction of the inner sleeve gradually increases.

6. The laser surgery catheter according to claim 2, characterized in that: The second support arm includes a second protruding section and a supporting section. The second protruding section is connected between the supporting section and the first support arm. In the direction away from the inner sleeve, the second protruding section extends obliquely toward the radial outside of the second channel, and the supporting section extends along the axial direction of the outer sleeve.

7. The laser surgery catheter according to any one of claims 1 to 6, characterized in that: The inner sleeve comprises a front end section and a main body section which are arranged along the axial direction and are detachably connected, and the supporting claw is connected to the front end section.

8. The laser surgery catheter according to any one of claims 1 to 6, characterized in that: The entirety of the supporting claws is disposed outside the second passage and is connected to an end surface of the inner sleeve in the axial direction thereof.

9. The laser surgery catheter according to any one of claims 1 to 6, characterized in that: There are at least three supporting claws, and on the cross section of the inner sleeve, a triangle formed by connecting at least three supporting claws is an acute triangle; Or, the supporting claw is a polytetrafluoroethylene member; Alternatively, the supporting claw is made of stainless steel.

10. The laser surgery catheter according to any one of claims 1 to 6, characterized in that: The outer sleeve is a polyvinyl chloride part.

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