Laser balloon catheter system

Abstract

The invention discloses a laser balloon catheter system which comprises a balloon catheter provided with a far end opposite to a near end, and the balloon catheter comprises a balloon body located at the far end; the light-emitting assembly comprises a light-emitting part and a light source which are connected through a light path, the light-emitting part and the light source are fixed to each other, and the far end of the light-emitting part is provided with a light-emitting working section extending into the balloon body; the light source is mounted on the linkage piece; and the driving mechanism acts on the linkage piece and is used for driving the light-emitting piece to move. Compared with the prior art, the laser balloon catheter system can drive the light-emitting part to move through the driving structure, the illumination uniformity of a lesion area is improved, and the use requirements of different application scenes are met.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a laser balloon catheter system. Background Art

[0002] Vascular diseases are close to the top of the list of human causes of death. For most vascular diseases, whether organic or functional, the basic pathological change is ischemic changes in organs caused by stenosis or occlusion of the blood vessel lumen. For example, the proliferation of neointima caused by cell and tissue damage in the blood vessel wall can easily lead to restenosis of the blood vessel lumen.

[0003] The laser balloon catheter system is a commonly used interventional device in the treatment of vascular lesions. It uses a balloon body to expand to a specified position and / or apply a therapeutic substance, and emits light of a specific wavelength through an optical fiber. The light passes through the catheter and the balloon body and acts on the vascular lesion area to repair tissues and cells of the blood vessel or promote the formation of a vascular micro-stent by drugs on the blood vessel wall. Existing such balloon catheters can achieve a certain therapeutic effect, but there is a problem of uneven light emission, resulting in poor therapeutic effect on vascular diseases. Summary of the Invention

[0004] In view of the problems in the prior art, this application provides a laser balloon catheter system to improve the therapeutic effect on the vascular lesion area.

[0005] The laser balloon catheter system provided by this application includes:

[0006] A balloon catheter having opposite proximal and distal ends, and the balloon catheter includes a balloon body at the distal end;

[0007] A light-emitting component including a light-emitting element and a light source connected by an optical path, and the light-emitting element and the light source are fixed to each other. The distal end of the light-emitting element has a light-emitting working section extending into the balloon body;

[0008] A linkage member, and the light source is installed on the linkage member;

[0009] A driving mechanism acting on the linkage member for driving the light-emitting element to move.

[0010] The following also provides several optional ways, which are not additional limitations to the above overall solution, but are only further supplements or optimizations. Without technical or logical contradictions, each optional way can be combined with the above overall solution alone, or multiple optional ways can be combined with each other.

[0011] Optionally, the movement mode of the light-emitting element is axial movement and / or circumferential rotation relative to the balloon body.

[0012] Optionally, the laser balloon catheter system further comprises a shell, the driving mechanism and the linkage member are located within the shell, and the distal end portion of the linkage member can enter and exit the shell during movement.

[0013] Optionally, the linkage member is a double helical screw having a first mounting hole extending along its own axis;

[0014] The driving mechanism comprises:

[0015] A motor, wherein the motor has an output shaft, and the double-helical screw is slidably sleeved on the output shaft through the first mounting hole;

[0016] The guide seat is fixedly arranged relative to the motor, and the guide seat cooperates with the spiral groove of the double-helical screw to drive the double-helical screw to reciprocate along the axial direction of the output shaft.

[0017] Optionally, a keyway structure that cooperates with each other is provided between the output shaft and the inner wall of the first mounting hole to guide the double helical screw to slide and rotate synchronously.

[0018] Optionally, a second mounting hole is provided at the distal end of the double-helix screw, and the light source is fixed in the second mounting hole;

[0019] The first mounting hole and the second mounting hole are also connected via a first middle hole, and a power line of the light source passes through the first middle hole and extends out of the double-helix screw.

[0020] Optionally, the output shaft is a hollow shaft, and the interior is a second middle hole connected to the first middle hole, and the power line of the light source extends out of the motor through the first middle hole and the second middle hole in sequence.

[0021] Optionally, the distal end side of the second mounting hole is an open end, and a connecting sleeve is fixed to the open end;

[0022] The proximal end of the light emitting element is provided with an optical path plug, and a mutually matching anti-dropping joint is provided between the connecting sleeve and the optical path plug.

[0023] Optionally, the light-emitting component is a light-emitting guidewire, which includes an optical fiber and a support member sleeved on the distal end of the optical fiber, and the distal end of the optical fiber has a light-emitting working section located within the balloon body.

[0024] Optionally, the light guide wire further includes a push rod, the push rod is a hollow tubular structure, the optical fiber is passed through the interior of the push rod and extends out of the distal end of the push rod, and the support member is fixed to the distal end of the push rod;

[0025] The optical path plug is fixed to the proximal end of the push rod, and the proximal end of the optical fiber extends out of the optical path plug.

[0026] Compared with the prior art, the laser balloon catheter system of the present application can drive the light-emitting member to move through the driving structure, which is beneficial to increasing the illumination uniformity of the lesion area to meet the usage requirements of different application scenarios, thereby improving the treatment effect on the vascular lesion area. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a laser balloon catheter system in an embodiment of the present application;

[0028] Figure 2 is Figure 1 an exploded view of

[0029] Figure 3 is Figure 2 a further exploded view of

[0030] Figure 4 is Figure 1 a cross-sectional view of

[0031] Figure 5 is a schematic structural diagram of an optical fiber in an embodiment;

[0032] Figure 6 is Figure 4 a partially enlarged view of

[0033] Figure 7 is a schematic structural diagram of a connecting sleeve in an embodiment;

[0034] Figure 8 is a schematic structural diagram of an optical path plug in an embodiment;

[0035] Figure 9 is a schematic structural diagram of a light-emitting guide wire in an embodiment;

[0036] Figure 10 is a partial cross-sectional view of a balloon catheter and a light-emitting guide wire in an embodiment;

[0037] Figure 11 is a partial cross-sectional view of the light-emitting guide wire.

[0038] The descriptions of the reference numerals in the drawings are as follows:

[0039] 100, balloon catheter; 110, balloon body; 120, outer tube; 130, inner tube; 140, catheter seat;

[0040] 200. Light-emitting component; 210. Light-emitting guide wire; 211. Optical fiber; 2111. Core; 2112. Cladding layer; 2113. Light-emitting working section; 2114. Protection tube; 212. Support member; 2121. First support section; 2122. Hollow section; 2123. Second support section; 213. Pushing rod; 2131. Reduced-diameter end; 214. Connecting member; 2141. Cone structure; 2142. Second necking structure; 215. Guide head; 2151. Spherical crown part; 2152. Cylindrical part; 220. Light source; 230. Optical path plug; 231. Support part; 2311. Contact end; 232. Expansion part; 2321. Second anti-disengagement; 2322. Second card slot;

[0041] 300. Linkage member; 310. Double-helical lead screw; 311. First mounting hole; 3111. First necking structure; 312. Second mounting hole; 313. First intermediate hole; 314. Helical groove; 320. Connecting sleeve; 321. First anti-disengagement; 322. First card slot;

[0042] 400. Driving mechanism; 410. Motor; 411. Output shaft; 4111. Second intermediate hole; 420. Guide seat;

[0043] 500. Housing;

[0044] L1. Span of the radial clearance in the axial direction of the optical fiber; L2. Span of the hollow section in the axial direction of the optical fiber. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0046] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] See Figures 1 to 11 In one embodiment of the present application, a laser balloon catheter system is provided, including a balloon catheter, a light-emitting assembly 200, a linkage member 300, and a driving mechanism 400. The balloon catheter 100 has opposite proximal and distal ends, including a balloon body 110 at the distal end. Here, the proximal and distal ends are with reference to the balloon catheter 100 itself. In the surgical state, the proximal end refers to the end of the balloon catheter facing the doctor, and the distal end refers to the end of the balloon catheter facing the patient's body. The light-emitting assembly 200 includes a light-emitting member and a light source 220 connected by an optical path, and the light-emitting member and the light source 220 are fixed to each other. The distal end of the light-emitting member has a light-emitting working section 2113 extending into the balloon body 110, and the light source 220 is installed on a transmission member. The driving mechanism 400 acts on the linkage member 300 to drive the light-emitting member to move.

[0049] Among them, the light-emitting member includes an optical fiber 211. The optical fiber 211 generally includes a core 2111 and a cladding layer 2112 that wraps the core 2111. A part of the distal end of the optical fiber 211 is exposed to serve as the light-emitting working section 2113. Specifically in use, according to the axial length of the balloon body 110, the part of the optical fiber 211 located inside the balloon body 110 (the light-emitting working section 2113) has its cladding layer removed, and the removal length of the cladding layer of the optical fiber 211 is equal to the axial length of the balloon body 110. The removal method can be selected as physical removal (such as sandblasting, grinding, scraping, etc.) or chemical removal. The surface of the light-emitting working section 2113 is polished to make the surface more uniform and improve the uniformity of light emission.

[0050] However, since the optical fiber 211 is a device that transmits light from one end (proximal end) to the other end (distal end) using the principle of total internal reflection, the light-emitting intensity of the optical fiber 211 will decrease as the axial length increases, resulting in uneven illumination intensity of the light-emitting working section 2113. In addition, the balloon catheter 100 includes a tube body, and the optical fiber 211 generally extends and is fixed along the inner wall or outer wall of the tube body. Therefore, the optical fiber 211 is on one side of the balloon body 110, which will also cause uneven illumination.

[0051] In the present application, the driving mechanism 400 can drive the light-emitting member to move through the linkage member 300. The specific movement method can be axial movement and / or axial rotation relative to the balloon body 110. Applied to the treatment of vascular stenosis lesions, it is beneficial to improve the uniformity of illumination of the vascular lesion area, thereby improving the treatment effect.

[0052] See Figure 1 In the shown embodiment, the laser balloon catheter system further includes a housing 500. The driving mechanism 400 and the linkage member 300 are located inside the housing 500, and the distal part of the linkage member 300 can move in and out of the housing 500 during the movement process.

[0053] Among them, the linkage member 300 is a double lead screw 310, and the double lead screw 310 is provided with a first mounting hole 311 extending along its own axial direction. The driving mechanism 400 includes a motor 410 and a guide seat 420. The motor 410 is a rotary motor 410 and is provided with an output shaft 411. The double lead screw 310 is slidably sleeved on the output shaft 411 through the first mounting hole 311. The guide seat 420 is mounted on the housing 500 and is fixedly arranged relative to the motor 410. A spiral groove 314 is provided on the outer surface of the double lead screw 310, and the guide seat 420 cooperates with the spiral groove 314 to drive the double lead screw 310 to reciprocate axially along the output shaft 411. Refer to Figure 1 、 4 , the guide seat 420 is generally in a "Y" - shaped structure.

[0054] Furthermore, in order to guide the sliding and synchronous rotation of the double lead screw 310, a keyway structure that cooperates with each other is provided between the output shaft 411 and the inner wall of the first mounting hole 311. In addition, a first necking structure 3111 is also provided at the distal end of the first mounting hole 311, which is used to limit the limit of the axial sliding of the double lead screw.

[0055] A second mounting hole 312 is opened at the distal end of the double lead screw 310, and the light source 220 is fixed in the second mounting hole 312. In the present application, the driving mechanism 400 can drive the light - emitting member and the light source 220 to rotate circumferentially and move axially relative to the balloon body 110 through the double lead screw, so as to change the axial and circumferential positions of the light - emitting workpiece section relative to the vascular lesion area, which is beneficial to improving the illumination uniformity.

[0056] In order to facilitate the power connection of the light source 220, in one embodiment, the first mounting hole 311 and the second mounting hole 312 are also connected through a first intermediate hole 313, and the power cord of the light source 220 extends out of the double lead screw 310 through the first intermediate hole 313.

[0057] Furthermore, the output shaft 411 is a central shaft, and its interior is a second intermediate hole 4111 communicated with the first intermediate hole 313. The power cord of the light source 220 extends out of the motor 410 through the first intermediate hole 313 and the second intermediate hole 4111 in sequence. The linkage member 300 can drive the power cord and the light source 220 to rotate together during the rotation process, avoiding the power cord from getting knotted.

[0058] In order to facilitate the connection between the light - emitting member and the linkage member 300, in one embodiment, the distal - end side of the second mounting hole 312 is an open end, and a connecting sleeve 320 is fixed at the open end. An anti - detachment structure is provided between the connecting sleeve 320 and the optical path plug 230 of the light - emitting member.

[0059] Refer to Figures 3 to 8, the connecting sleeve 320 is generally a cylindrical structure and has a first through hole penetrating axially. An anti - detachment head is fixed on the end of the distal end of the connecting sleeve 320. The optical path plug 230 is a cylindrical structure and has a second through hole penetrating axially. The proximal end of the optical path plug 230 is fitted with the connecting sleeve 320, and the distal end of the optical path plug 230 is fixed to the push rod 213. Specifically, the proximal end of the optical path plug 230 has a contact end 2311, and the proximal end of the optical fiber 211 extends to the contact end 2311. During assembly, the contact end 2311 extends into the first through hole to contact the light source 220, thereby realizing the optical path connection between the light - emitting component and the light source 220.

[0060] The anti - detachment structure includes a first anti - detachment buckle 321 and a first card slot 322 provided at the distal end of the connecting sleeve 320, and a second anti - detachment buckle 2321 and a second card slot 2322 provided at the proximal end of the optical path plug 230. Among them, the first anti - detachment buckle 321 cooperates with the second card slot 2322, and the second anti - detachment buckle 2321 cooperates with the first card slot 322. Further, the optical path plug 230 includes a support portion 231 and an extension portion extending radially along the support portion 231. The support portion 231 has a second through hole axially, the extension portion is open on the side facing the proximal end, and the second anti - detachment buckle 2321 and the second card slot 2322 are provided on the inner wall of the expansion portion 232.

[0061] In one embodiment, the balloon catheter 100 further includes an inner tube 130, and the optical fiber 211 extends along the inner wall or the outer wall of the inner tube 130. The balloon catheter 100 further includes a catheter seat 140, and the catheter seat 140 has an interface. One end of the optical path plug 230 slides through the interface.

[0062] See Figures 9 to 11 In another embodiment shown, the light - emitting component is a light - emitting guide wire 210. The light - emitting guide wire 210 specifically includes an optical fiber 211 and a support member 212. The support member 212 is sleeved on the distal end of the optical fiber 211, and the distal end of the optical fiber 211 has a light - emitting working section 2113 located inside the balloon body 110.

[0063] Further, the light - emitting guide wire 210 further includes a push rod 213. The push rod 213 is a hollow tubular structure. The optical fiber 211 passes through the inside of the push rod 213, and the light - emitting working section 2113 extends out of the distal end of the push rod 213. The support member 212 is fixed to the distal end of the push rod 213. The optical path plug 230 is fixed to the proximal end of the push rod 213. The proximal end of the optical fiber 211 extends out of the push rod 213 and extends into the second through hole to the contact end 2311. The contact end 2311 extends into the first through hole to contact the light source 220, thereby realizing the optical path connection between the light - emitting component and the light source 220. The fixing method between the optical path plug 230 and the push rod 213 can be screw fitting and / or snap - fitting.

[0064] In one embodiment, the light-emitting guide wire 210 further includes a guiding head 215 and a connecting member 214. The guiding head 215 is connected to the distal end of the optical fiber 211 and is used to guide the light-emitting guide wire 210 to travel in the lumen of human tissue. Both ends of the support member 212 are respectively connected to the guiding head 215 and the pushing rod 213 to provide corresponding support strength.

[0065] Reference Figure 11 In one embodiment shown for reference, the support member 212 is a spiral structure, such as a spiral spring. The support member 212 sequentially includes a first support section 2121, a hollowed section 2122, and a second support section 2123 from the proximal end to the distal end. The pitch of the hollowed section 2122 is greater than the pitches of the first support section 2121 and the second support section 2123. The pitches of the first support section 2121 and the second support section 2123 are 0.04 - 0.1 mm, for example, 0.05 - 0.06 mm; the pitch of the hollowed section 2122 is 0.1 - 0.4 mm, for example, 0.2 - 0.35 mm, or for example, 0.3 mm. The first support section 2121 and the second support section 2123 are respectively fixedly connected to the pushing rod 213 and the guiding head 215 to provide sufficient support strength. The axial position of the light-emitting working section 2113 corresponds to the hollowed section 2122 to ensure the effect of the light-emitting guide wire 210 emitting light. To ensure that the light transmittance after the light-emitting working section 2113 emits light is above 80%, the hollowing ratio of the hollowed section 2122 is at least 80%, for example, at least 90%, or for example, at least 95%.

[0066] Both the support strength of the support member 212 and the light transmittance allowed after the light-emitting working section 2113 emits light are related to the specific structure of the spiral spring. The spiral spring can be made of a metal wire, and the diameter of the metal wire is 0.04 - 0.1 mm. Further preferably, it is spirally wound by a metal wire with a diameter of 0.05 - 0.06 mm. The material of the metal wire is one of platinum tungsten, platinum iridium, stainless steel, gold, and nickel titanium. The diameter of the spiral spring should be appropriate. If the diameter is too large, it will increase the radial size of the light-emitting guide wire 210. If the diameter is too small, it will affect the support strength of the spiral spring. The diameter of the spiral spring can be 0.2 - 0.5 mm, for example, 0.2 - 0.4 mm, or for example, 0.35 mm. In addition, the length of the hollowed section 2122 is 2 - 4 cm, for example, 2 - 3 cm, or for example, 3 cm, so that the light-emitting guide wire 210 can be adapted to the corresponding balloon body 110 during application.

[0067] The proximal end of the connecting member 214 is sleeved and fixed to the distal end of the pushing rod 213, and the distal end is a tapered structure 2141 with a gradually decreasing diameter. The first support section 2121 of the spiral spring is fixed to the tapered structure 2141. In addition, the guiding head 215 includes a spherical crown part 2151 at the distal end and a cylindrical part 2152 proximal to the spherical crown part 2151. The second support section 2123 of the spiral spring is sleeved and fixed to the cylindrical part 2152.

[0068] The distal end of the push rod 213 is a reduced-diameter end 2131. Inside the proximal end of the connecting member 214, a second necking structure 2142 is provided for the reduced-diameter end 2131 to extend into. The shape of the second necking structure 2142 is adapted to that of the reduced-diameter end 2131. During assembly, the reduced-diameter end 2131 of the push rod 213 is connected in cooperation with the second necking structure 2142 of the connecting member 214. Further, the surfaces of the connecting parts of the push rod 213 and the connecting member 214 are flush, making the structure of the light-emitting guide wire 210 compact, which is beneficial to the subsequent cooperative assembly with the balloon catheter 100. After the above components are connected, laser welding can be used for fixation.

[0069] See Figure 11 , the cone structure 2141 gradually reduces in diameter from the proximal end to the distal end. There is a radial gap between the first support section 2121 and the cone structure 2141, and the radial gap gradually increases from the proximal end to the distal end. The span of the radial gap in the axial direction of the optical fiber 211 is L1, and the axial span of the hollow section 2122 of the optical fiber 211 is L2, and L1:L2 = 1:1.2 - 3 times, for example 1:1.5 - 2.5, or for example 1:1.5 - 2, and further for example 1:1.8.

[0070] In the light-emitting guide wire 210, the material of the core 2111 can be a plastic optical fiber 211 or a quartz optical fiber 211, preferably a plastic optical fiber 211, which has good flexibility and elasticity and is suitable as a guide wire. The diameter of the optical fiber 211 can be 0.1 - 0.3 mm, for example 0.125 - 0.25 mm, or for example 0.125 mm. If the optical fiber 211 is too thin, it is easy to break during use; if the optical fiber 211 is too thick, it will cause the radial size of the light-emitting guide wire 210 to be too large, affecting the subsequent application of the light-emitting guide wire 210. A protective tube 2114 can also be wrapped around the outer periphery of the optical fiber 211 to protect the optical fiber 211.

[0071] The material of the push rod 213 can be a nitinol alloy, and the material of the connecting member 214 can be selected from plastics or stainless steels. The plastic is, for example, acrylonitrile-butadiene-styrene copolymer, and the stainless steel is, for example, 304 stainless steel. The connections between the push rod 213, the connecting member 214, the support member 212, and the guiding head 215 can all be fixed by laser welding.

[0072] See FIGS. 1 and 10. The balloon catheter 100 further includes an inner tube 130 and an outer tube 120 which are sleeved with each other, wherein the inner tube 130 provides a guide wire channel, and the light-emitting guide wire 210 is movably threaded through the guide wire channel. The balloon catheter 100 further includes a catheter hub 140 ( Figure 1 The position of the catheter hub 140 is indicated by the dashed box part, and the specific structure is prior art and will not be elaborated herein), and the catheter hub 140 has an interface, and one end of the optical path plug 230 is slidably threaded through the interface.

[0073] The material of the inner tube 130 can be selected from block polyetheramide resin (PEBAX), nylon, or thermoplastic polyurethane elastomer rubber (TPU), and the color is colorless and transparent, which is beneficial to the light transmission of the light-emitting guide wire 210. The material of the outer tube 120 can be selected from PEBAX or nylon.

[0074] The laser balloon catheter system of the present application can drive the light-emitting member to move through the linkage member 300 via the driving structure, change the position of the light-emitting member relative to the lesion area, which is beneficial to improving the light uniformity of the lesion area, and can meet the usage requirements of different application scenarios to enhance the treatment effect on the vascular lesion area.

[0075] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification. When the technical features in different embodiments are shown in the same drawing, the drawing can be regarded as also disclosing the combined examples of the various embodiments involved.

[0076] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A laser balloon catheter system, characterized in that, include: A balloon catheter having a proximal end and a distal end opposite to each other, the balloon catheter comprising a balloon body located at the distal end; A light-emitting assembly, comprising a light-emitting member and a light source connected in an optical path, wherein the light-emitting member and the light source are fixed to each other, and the distal end of the light-emitting member has a light-emitting working section extending into the balloon body; A linkage member, wherein the light source is mounted on the linkage member; The driving mechanism acts on the linkage member to drive the light-emitting member to move.

2. The laser balloon catheter system according to claim 1, wherein The movement mode of the light emitting element is axial movement and / or circumferential rotation relative to the balloon body.

3. The laser balloon catheter system according to claim 1, wherein It also includes a shell, the driving mechanism and the linkage member are located in the shell, and the distal end of the linkage member can enter and exit the shell during movement.

4. The laser balloon catheter system according to claim 1, wherein The linkage member is a double helical screw having a first mounting hole extending along its axis; The driving mechanism comprises: A motor, wherein the motor has an output shaft, and the double-helical screw is slidably sleeved on the output shaft through the first mounting hole; The guide seat is fixedly arranged relative to the motor, and the guide seat cooperates with the spiral groove of the double-helical screw to drive the double-helical screw to reciprocate along the axial direction of the output shaft.

5. The laser balloon catheter system according to claim 4, characterized in that, A keyway structure that cooperates with each other is provided between the output shaft and the inner wall of the first mounting hole to guide the double helical screw to slide and rotate synchronously.

6. The laser balloon catheter system according to claim 4, wherein, A second mounting hole is formed at the distal end of the double-helix screw, and the light source is fixed in the second mounting hole; The first mounting hole and the second mounting hole are also connected via a first middle hole, and a power line of the light source passes through the first middle hole and extends out of the double-helix screw.

7. The laser balloon catheter system according to claim 6, wherein, The output shaft is a hollow shaft, and the interior thereof is a second middle hole connected to the first middle hole. The power line of the light source extends out of the motor through the first middle hole and the second middle hole in sequence.

8. The laser balloon catheter system according to claim 6, wherein The distal end side of the second mounting hole is an open end, and a connecting sleeve is fixed to the open end; The proximal end of the light emitting element is provided with an optical path plug, and a mutually matching anti-dropping structure is provided between the connecting sleeve and the optical path plug.

9. The laser balloon catheter system according to claim 8, wherein The light-emitting component is a light-emitting guide wire, which includes an optical fiber and a support member sleeved on the distal end of the optical fiber. The distal end of the optical fiber is provided with a light-emitting working section located in the balloon body.

10. The laser balloon catheter system according to claim 9, wherein, The light-emitting guide wire also includes a push rod, which is a hollow tubular structure, the optical fiber is inserted into the push rod, and the light-emitting working section extends out of the distal end of the push rod, and the support member is fixed to the distal end of the push rod; The optical path plug is fixed to the proximal end of the pushing rod, and the proximal end of the optical fiber extends out of the optical path plug.

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