A rolling scored balloon

Abstract

The invention discloses a rolling scoring balloon, which relates to the technical field of medical devices, and includes a catheter and a balloon connected to the distal end of the catheter; the balloon is suitable for contraction and expansion, a guide rail is arranged on the outer wall of the balloon, a drug loading groove suitable for placing drugs is arranged in the guide rail, a scoring piece connected to the guide rail in a rolling manner is arranged on the guide rail, and a groove is arranged on the scoring piece. In this arrangement, drugs are placed in the guide rail, and delivered to the location of the diseased tissue in the state of balloon contraction, and the balloon is expanded after reaching the location of the diseased tissue, so that the scoring piece contacts the location of the diseased tissue, and the scoring piece is close to the location of the diseased tissue for rolling cutting, when the scoring piece rolls to make the groove located in the guide rail, the groove can be filled with drugs, the scoring piece continues to roll, the groove filled with drugs rotates and brings the drugs to the location of the diseased tissue, and extends into the cutting position to reach the middle membrane, so that the drugs of the existing scoring balloons are delivered to the diseased tissue deeper, and the treatment effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a rolling scored balloon. Background Art

[0002] The scored balloon is a special type of balloon that combines micro-cutting technology with balloon dilation. When the balloon is opened, the cutting component is propped outward, cutting the diseased tissue in the blood vessel to a certain extent, making it easier to open the balloon and prop up the blood vessel. The pressure used is lower, avoiding the rupture of the blood vessel due to the balloon being propped up too much. Compared with ordinary balloon dilation, the cut balloon can reduce inflammatory response, elastic retraction, vascular endothelial damage, vascular smooth muscle cell proliferation response and potential restenosis risk, and obtain more vascular lumen area. It has the potential to improve the success rate of the technology, increase vascular patency and better long-term results.

[0003] Existing scored balloons or drug-eluting balloons also form a drug coating on the balloon surface, release therapeutic drugs at the lesion site, and diffuse the drugs into the tissue of the lesion vessel wall to inhibit intimal hyperplasia. In the process of treating the lesion, it can effectively alleviate the subsequent possible restenosis problem and achieve a better lumen dilation effect. However, the arterial wall is composed of the intima, middle membrane, and outer membrane that fit closely together. Existing scored balloons or drug-eluting balloons can only deliver drugs to the intima of the vessel wall that the balloon surface can contact by forming a drug coating on the balloon surface, but cannot continue to deliver drugs deeply, and the treatment effect is not ideal. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the scored balloon or drug balloon in the prior art can only deliver drugs to the inner membrane on the inner surface of the blood vessel wall, but cannot continue to deliver drugs deeply, resulting in poor treatment effect, thereby providing a rolling scored balloon.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A rolling scored balloon comprises a catheter and a balloon connected to the distal end of the catheter; the balloon can expand relative to the radial direction of the catheter, a guide rail is arranged on the outer wall of the balloon, a drug loading groove suitable for placing drugs is arranged in the guide rail, a scoring piece rollingly connected to the guide rail is arranged on the guide rail, and a groove is arranged on the surface of the scoring piece; when the scoring piece rolls along the guide rail, the groove on the scoring piece passes through the drug loading groove and transfers the drugs in the drug loading groove.

[0007] Furthermore, the notching member includes a roller shaft rollingly connected to the guide rail and a rolling member connected to the roller shaft, and a plurality of grooves are arranged on the surface of the rolling member.

[0008] Furthermore, a traction member is connected to the roller shaft, and the traction member is suitable for pulling the rolling member to roll along the guide rail. The traction member includes two traction ropes, one end of the two traction ropes are respectively connected to the opposite ends of the roller shaft, and the other ends of the two traction ropes are merged and connected and extend toward the proximal end; fixing rings are provided on both ends of the roller shaft, and one end of the two traction ropes are respectively connected to the two fixing rings.

[0009] Furthermore, the roller shaft is a cylindrical roller shaft, the rolling element is a circular roller, and the plurality of grooves are evenly distributed along the circumference of the circular roller.

[0010] Furthermore, a rack is provided on the guide rail, the roller shaft is a gear, and the rack is meshed with the gear.

[0011] Furthermore, the rolling element is a multi-impeller, which includes a sleeve sleeved on the roller shaft and a plurality of teeth connected to the outer periphery of the sleeve, and each of the teeth is provided with the groove.

[0012] Furthermore, the tooth piece is in an inwardly curved arc shape, and the outer diameter of the tooth piece gradually decreases from the inside to the outside.

[0013] Furthermore, the two fixing rings are both sleeved on the gears, the fixing rings are gear shaft sleeves, and elastic members are both provided on the two gear shaft sleeves, and the elastic members extend toward the distal end and are fixed on the end wall of the guide rail.

[0014] Furthermore, the drug loading groove is V-shaped.

[0015] Furthermore, the balloon is a structure that is cylindrical in the middle and conical at both ends. The cylindrical structure in the middle of the balloon is a working section, and the cones at both ends of the balloon are non-working sections. At least two guide rails are provided, and the length direction of the guide rails is arranged along the axial direction of the balloon. One end of the guide rail is fixed to the terminal tube at the distal end of the catheter, and the other end of the guide rail is fixed to the proximal end of the working section of the balloon; the notched member is rollingly provided on each of the guide rails.

[0016] The technical solution of the present invention has the following advantages:

[0017] 1. The rolling scored balloon provided by the present invention places drugs in the drug loading groove of the guide rail, and the catheter transports the balloon in a contracted state to the location of the diseased tissue. After the balloon reaches the location of the diseased tissue, it expands radially so that the scored member contacts the diseased tissue, and the scored member rolls and cuts along the diseased tissue. At the same time, the setting of the guide rail can limit and guide the scored member. When the scored member rolls, the groove on the scored member passes through the drug loading groove in the guide rail, and the groove will be filled with the drug in the drug loading groove. When the scored member continues to roll, the groove filled with the drug is transferred to the outside of the guide rail, which just brings the drug to the location of the diseased tissue. In the process of rolling cutting of the scored member, the drug can be brought to the cutting site and extend into the cutting site to reach the middle membrane of the vascular wall of the diseased tissue, so that the drug can be delivered to a deeper level of the diseased tissue than the existing scored balloon, and the treatment effect is better.

[0018] 2. The rolling scored balloon provided by the present invention comprises a roller shaft rollingly connected to the guide rail and a rolling member connected to the roller shaft, and a plurality of grooves are arranged on the surface of the rolling member. In this arrangement, the rolling member is connected to the guide rail through the roller shaft, and the guide rail can limit the rolling member. The grooves are arranged on the rolling member, and when the rolling member rolls on the guide rail, the grooves can be filled with medicine, and the medicine in the grooves can be brought to the location of the diseased tissue during the rolling process, ensuring that the medicine accurately reaches the location of the diseased tissue.

[0019] 3. The rolling scoring balloon provided by the present invention has a traction member connected to the roller shaft, and the traction member is suitable for pulling the rolling member to roll along the guide rail. The traction member includes two traction ropes, one end of which is respectively connected to the opposite ends of the roller shaft, and the other ends of the two traction ropes are combined and connected and extend toward the proximal end. With such a configuration, the operator can move the rolling member on the guide rail by pulling the proximal end of the traction member, and the position of the rolling member on the guide rail is controlled by the traction member, thereby improving the accuracy of surgical cutting.

[0020] 4. The rolling scored balloon provided by the present invention has a cylindrical roller shaft, a circular roller, and a plurality of grooves evenly distributed along the circumference of the circular roller. By arranging a plurality of grooves evenly distributed along the circumference of the circular roller, the uniformity of cutting and drug administration can be improved, so that the diseased tissue location being cut can be provided with drugs, thereby inhibiting the proliferation of the intima at the diseased tissue location and preventing restenosis.

[0021] 5. The rolling scoring balloon provided by the present invention has two fixing rings which are sleeved on the gears, and the fixing rings are gear shaft sleeves. Both gear shaft sleeves are provided with elastic members, which extend to the distal end and are fixed to the end wall of the guide rail. With such a configuration, after the traction member pulls the rolling member to roll toward the proximal end, the force applied to the traction member can be reduced, so that the rolling member rolls toward the distal end under the restoring force of the elastic member, thereby realizing the bidirectional rolling of the rolling member, and further allowing more drugs to adhere to the location of the cut lesion tissue.

[0022] 6. The rolling scoring balloon provided by the present invention is a structure with a cylindrical middle and conical ends. The cylindrical structure in the middle is the working section, and the conical ends are the non-working sections. Three guide rails are arranged, and the three guide rails are axially equidistantly distributed on the working section of the balloon. Each guide rail is rollingly provided with scoring elements. With such an arrangement, the lesion can be cut from multiple angles in the blood vessel through three scoring elements equidistantly distributed on the outer wall of the balloon. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a rolling scored balloon provided in Embodiment 1 of the present invention;

[0025] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0026] Figure 3 A front view of the rolling scored balloon provided in Example 1 of the present invention;

[0027] Figure 4 It is an enlarged view of B in the figure;

[0028] Figure 5 It is a three-dimensional structural diagram of the guide rail and the circular roller in the first embodiment;

[0029] Figure 6 This is a schematic diagram of the result of the guide rail and the circular roller in Example 1;

[0030] Figure 7 for Figure 6 Sectional view of aa in the figure;

[0031] Figure 8 It is a front view of the guide rail and the circular roller in the first embodiment;

[0032] Fig. 9 for Figure 8 Cross-sectional view of the middle bb;

[0033] Fig.10 for Figure 8 Sectional view of CC;

[0034] Fig.11 It is a three-dimensional structural diagram of the traction member and the circular roller in the first embodiment;

[0035] Fig.12 It is a schematic diagram of the structure of the traction member and the circular roller in the first embodiment;

[0036] Fig.13 for Fig.12 Cross-sectional view of dd;

[0037] Fig.14 It is a three-dimensional structural diagram of the guide rail and the multi-impeller in the second embodiment;

[0038] Fig.15 It is a schematic diagram of the structure of the guide rail and the multi-impeller in the second embodiment;

[0039] Fig.16 It is a front view of the guide rail and the multi-impeller in the second embodiment;

[0040] Fig.17 for Fig.16 Sectional view of middle ee;

[0041] Fig.18 It is a three-dimensional structural diagram of the traction member and the multi-impeller in the second embodiment;

[0042] Fig.19 It is a schematic diagram of the structure of the traction member and the multi-impeller in the second embodiment.

[0043] Explanation of the reference numerals in the accompanying drawings: 1. catheter; 2. balloon; 3. notched part; 4. guide rail; 5. drug loading groove; 6. locking ring; 7. cylindrical roller; 8. circular roller; 9. strip groove; 10. traction part; 11. traction rope; 12. rack; 13. gear; 14. multi-impeller; 15. gear plate; 16. arc groove; 17. blade; 18. elastic part; 19. fixing ring; 20. gear sleeve. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like 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 cannot be understood as a limitation on the present invention. The "proximal end" and "distal end" in the present invention refer to near and far relative to the operator. When the present invention is in use, the end close to the doctor or operator is the "proximal end", that is, the end where the operator is located, and the end away from the doctor or operator is the "distal end". In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0048] Embodiment 1:

[0049] like Figure 1-Figure 13 A rolling scored balloon shown in the figure comprises a catheter 1 and a balloon 2 connected to the distal end of the catheter 1; the balloon 2 can expand relative to the radial direction of the catheter 1, a guide rail 4 is arranged on the outer wall of the balloon 2, a drug loading groove 5 suitable for placing drugs is arranged in the guide rail 4, a scoring member 3 rollingly connected to the guide rail 4 is arranged on the guide rail 4, and a groove is arranged on the surface of the scoring member 3; when the scoring member 3 rolls along the guide rail 4, the groove on the scoring member 3 passes through the drug loading groove 5 and transfers the drug in the drug loading groove 5.

[0050] like Figure 1 As shown, the balloon 2 includes a working section in the middle and non-working sections at both ends of the working section in the axial direction. The non-working sections are connected between the working section and the catheter 1, and the working section and the non-working sections at both ends are an integrated structure. When the balloon 2 is in a filled state, the working section in the middle of the balloon 2 is cylindrical, and the non-working sections at both ends of the balloon 2 in the axial direction are truncated cone-shaped. In other alternative embodiments, the shape of the non-working section after the balloon 2 is expanded is not limited to a truncated cone, but can also be a parabola of revolution.

[0051] In this embodiment, a guide rail 4 is provided on the outer wall of the working section of the balloon 2, and the length direction of the guide rail 4 is provided along the axial direction of the balloon 2. One end of the guide rail 4 is fixed to the terminal tube at the distal end of the catheter 1, and the other end of the guide rail 4 is fixed to the proximal end of the working section of the balloon 2. A drug loading groove 5 suitable for placing drugs is provided at the bottom of the guide rail 4, and each guide rail 4 is provided with a scoring member 3 that is rollingly connected to the guide rail 4; the surface of the scoring member 3 is provided with a groove. When the scoring member 3 rolls along the guide rail 4, the groove on the scoring member 3 passes through the drug loading groove 5 and transfers the drug in the drug loading groove 5.

[0052] Specifically, the drug loading groove 5 is a V-shaped groove, and after the scoring member 3 rolls once in the V-shaped groove, the drug in the V-shaped groove is partially transferred to the groove on the surface of the scoring member 3. The V-shaped groove is used as the design of the drug loading groove 5, so that the drug loading groove 5 can still have the drug after multiple rolling and medication, avoiding the situation that the drug cannot be transferred to the scoring member 3 after multiple rolling. In an alternative embodiment, the drug loading groove 5 can also be a U-shaped groove or a rectangular groove.

[0053] In this embodiment, in the initial state, the balloon 2 is in a contracted and folded state, at which time the notched member 3 is located at the farthest end of the guide rail 4. The notched member 3 located here can make the overall outer diameter of the entire balloon 2 smaller, which is beneficial to the movement of the balloon 2 in the blood vessel.

[0054] This rolling scored balloon places medicine in the guide rail 4 and delivers it to the location of the diseased tissue when the balloon 2 is in a contracted state. After reaching the location of the diseased tissue, the scored member 3 is pulled along the guide rail 4 to the working end of the balloon 2, and then the balloon 2 is radially expanded to make the scored member 3 contact the location of the diseased tissue, so that the scored member 3 rolls and cuts along the location of the diseased tissue. At the same time, the setting of the guide rail 4 can limit and guide the scored member 3. When the scored member 3 rolls to make the groove located in the guide rail 4, the groove can be filled with medicine. When the scored member 3 continues to roll, the groove filled with medicine is transferred to the outside of the guide rail 4, just bringing the medicine to the location of the diseased tissue. During the rolling cutting process of the scored member 3, the medicine can be brought to the cutting site and extend into the cutting site to reach the middle membrane of the vascular wall of the diseased tissue, so that the medicine can be delivered to deeper into the diseased tissue than the existing scored balloon, and the treatment effect is better.

[0055] In some embodiments, three guide rails 4 are evenly spaced along the outer wall of the working section of the balloon 2. With this arrangement, the diseased area can be cut from multiple angles in the blood vessel through three evenly spaced notching members 3 on the outer wall of the balloon 2.

[0056] In this embodiment, the scoring member 3 includes a cylindrical roller shaft 7 rollingly mounted on the guide rail 4 and a circular roller 8 connected to the cylindrical roller shaft 7, and a plurality of grooves are arranged on the disc-shaped surface of the circular roller 8. In this arrangement, the circular roller 8 is connected to the guide rail 4 through the cylindrical roller shaft 7, and the guide rail 4 can limit the circular roller 8. The grooves are arranged on the surface of the circular roller 8, and the grooves can be filled with medicine when the rolling member rolls on the guide rail 4. During the rolling process, the medicine in the groove can be brought to the location of the diseased tissue, ensuring that the medicine accurately reaches the location of the diseased tissue. Specifically, grooves are arranged on both opposite sides of the circular roller 8. In an alternative embodiment, the grooves on the circular roller 8 can also be arranged to be through.

[0057] In this embodiment, a plurality of grooves are evenly distributed along the circumference of the circular roller 8. Such arrangement can improve the uniformity of the circular roller 8 when cutting and administering drugs, so that the cut lesion tissue can be loaded with drugs, inhibit the intimal hyperplasia at the lesion tissue, and prevent restenosis. Specifically, the grooves on the circular roller 8 are strip grooves 9 extending along its radius, the length direction of the strip grooves 9 is arranged along the radial direction of the circular roller 8, one end of the strip grooves 9 extends to the middle of the side of the circular roller 8, and the other end extends to the side edge of the circular roller 8; the end of the strip groove 9 farther from the center of the circular roller 8 can flow to the end closer to the center of the circular roller 8 after loading the drugs, so as to increase the contact area between the strip grooves 9 and the lesion tissue and increase the drug administration treatment effect.

[0058] In this embodiment, a traction member 10 is connected to the cylindrical roller shaft 7. The traction member 10 is suitable for pulling the circular roller 8 to roll along the guide rail 4. The traction member 10 includes two traction ropes 11. One end of the two traction ropes 11 is respectively connected to the opposite ends of the cylindrical roller shaft 7, and the other ends of the two traction ropes 11 are connected and extended toward the proximal end. With such a configuration, the operator can move the circular roller 8 on the guide rail 4 by pulling the proximal end of the traction member 10, and the position of the circular roller 8 on the guide rail 4 can be controlled by the traction member 10, thereby improving the accuracy of surgical cutting. Specifically, the length of the unmerged ends of the two traction ropes 11 extending to the merged position exceeds the radius of the circular roller 8. With such a configuration, the circular roller 8 can be prevented from touching the traction rope 11 when rolling, thereby affecting the rolling of the circular roller 8.

[0059] Specifically, fixing rings 19 are provided on both ends of the cylindrical roller shaft 7 , and one end of the two traction ropes 11 is connected to the two fixing rings 19 respectively.

[0060] In this embodiment, a fastening ring is sleeved on the outer wall of one end of the catheter 1 close to the balloon 2, and the traction member 10 is inserted into the fastening ring. In this way, the traction member 10 can be fixed to the outer wall of the catheter 1 by the fixing ring 19 to prevent the traction member 10 from moving during the operation.

[0061] Embodiment 2:

[0062] like Figure 14-Figure 19 As shown, in this embodiment, the difference from the first embodiment is that two parallel racks 12 are provided on the upper surface of the guide rail 4, the roller is a gear 13 with a toothed structure on the outer surface, and the gear 13 is meshed with the rack 12 on the guide rail 4. The rolling element is a multi-impeller 14, which includes an annular sleeve sleeved on the gear 13 and a plurality of tooth pieces 15 integrally connected to the outer periphery of the annular sleeve, and each tooth piece 15 is provided with a groove. In this way, through the meshing of the gear 13 and the rack 12, the stability and accuracy of the rotation of the multi-impeller 14 can be improved, and the reliability is higher than that of the cylindrical roller 7.

[0063] In this embodiment, the multi-impeller 14 has four teeth 15, which are evenly distributed in the circumferential direction, and are in an arc shape that bends inward. The outer diameter of the teeth 15 gradually decreases from the inside to the outside, and a blade 17 is provided on the edge of the teeth 15 to facilitate cutting of the diseased tissue. By providing the arc-shaped teeth 15, the contact distance between the blade and the diseased tissue in the blood vessel can be increased, the cutting resistance can be reduced, and the tissue at the location of the diseased tissue can be cut more smoothly, thereby improving the cutting efficiency.

[0064] Specifically, the groove on the tooth piece 15 is an arc groove 16, and the curvature of the arc groove 16 changes with the curvature of the tooth piece 15. Specifically, each tooth piece 15 is provided with four arc grooves 16, and the four arc grooves 16 are respectively distributed on two opposite sides of the tooth piece 15. In an alternative embodiment, the number of tooth pieces 15 and arc grooves 16 can be increased or decreased according to demand.

[0065] Specifically, the side of the tooth piece 15 gradually bulges from the edge blade 17 to the middle of the tooth piece 15 to form a cone, the highest point of the cone is provided with a blade, and arc-shaped grooves 16 are provided on the inclined surfaces on both sides of the cone. Such a configuration can increase the contact surface of the tooth piece 15 for cutting the lesion tissue in the blood vessel, and further improve the cutting efficiency of the multi-impeller 14 for the lesion tissue in the blood vessel; and the cone-shaped tooth piece 15 can improve the structural strength of the tooth piece 15, make the tooth piece 15 harder, avoid unnecessary damage such as stretching and twisting of the tooth piece 15, ensure cutting efficiency, and at the same time, more drugs in the arc-shaped groove 16 can be delivered to the cut lesion tissue, improving the treatment effect.

[0066] In this embodiment, the fixing rings at both ends of the gear 13 are connected with elastic members 18, and the fixing ring sleeved on the gear 13 is a gear sleeve 20, and the elastic member 18 extends to the distal end and is fixed to the end wall of the guide rail 4. In this way, after the traction member 10 pulls the rolling member to roll toward the proximal end, the force applied to the traction member 10 can be reduced, so that the rolling member rolls toward the distal end under the restoring force of the elastic member 18, thereby realizing the bidirectional rolling of the multi-impeller 14, and then more drugs are adhered to the position of the cut lesion tissue.

[0067] Specifically, the elastic member 18 includes two elastic ropes, one end of each of which is connected to the gear sleeves 20 at the opposite ends of the gear 13, and the other ends of the two elastic ropes are connected and extended to the far end. Specifically, the unconnected ends of the two elastic ropes extend to a length of the connection point when not stretched that exceeds the radius of the multi-impeller 14. This arrangement can prevent the gears 15 from touching the elastic ropes when the multi-impeller 14 rotates and thus affecting the rolling of the multi-impeller 14. In an alternative embodiment, the unconnected part of the elastic member 18 can also be set as a non-elastic connecting rope, the length of which also exceeds the radius of the multi-impeller 14, and the connection point is set as an elastic elastic rope.

[0068] To sum up, this rolling scored balloon places medicine in the guide rail 4 and delivers it to the location of the diseased tissue when the balloon 2 is in a contracted state. After reaching the location of the diseased tissue, the scored member 3 is pulled along the guide rail 4 to the working end of the balloon 2, and then the balloon 2 is radially expanded so that the scored member 3 contacts the location of the diseased tissue, and the scored member 3 is rolled and cut along the location of the diseased tissue. At the same time, the setting of the guide rail can limit and guide the scored member 3. When the scored member 3 rolls to make the groove located in the guide rail 4, the groove can be filled with medicine. When the scored member 3 continues to roll, the groove filled with medicine is transferred to the outside of the guide rail 4, which just brings the medicine to the location of the diseased tissue. During the rolling cutting process of the scored member 3, the medicine can be brought to the cutting site and extend into the cutting site to reach the middle membrane of the vascular wall of the diseased tissue, so that the medicine can be delivered to deeper into the diseased tissue than the existing scored balloon, and the treatment effect is better.

[0069] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A rolling scored balloon, characterized in that: The invention comprises a catheter (1) and a balloon (2) connected to the distal end of the catheter (1); the balloon (2) can expand relative to the radial direction of the catheter (1); a guide rail (4) is arranged on the outer wall of the balloon (2); a drug loading groove (5) suitable for placing drugs is arranged in the guide rail (4); a notched member (3) is provided on the guide rail (4) and is connected to the guide rail (4) in a rolling manner; a groove is arranged on the surface of the notched member (3); when the notched member (3) rolls along the guide rail (4), the groove on the notched member (3) passes through the drug loading groove (5) and transfers the drug. The medicine in the medicine loading groove (5); the scoring member (3) comprises a roller shaft rollingly connected to the guide rail (4) and a rolling member connected to the roller shaft, and a plurality of grooves are arranged on the surface of the rolling member; a traction member (10) is connected to the roller shaft, and the traction member (10) is suitable for pulling the rolling member to roll along the guide rail (4), and the traction member (10) comprises two traction ropes (11), one end of the two traction ropes (11) is respectively connected to the opposite ends of the roller shaft, and the other ends of the two traction ropes (11) are combined and connected and extend toward the proximal end.

2. The rolling scored balloon according to claim 1, characterized in that: Both ends of the roller shaft are provided with fixing rings (19), and one end of the two traction ropes (11) is respectively connected to the two fixing rings (19).

3. The rolling scored balloon according to claim 1, characterized in that: The roller shaft is a cylindrical roller shaft (7), the rolling element is a circular roller (8), and the plurality of grooves are evenly distributed along the circumference of the circular roller (8).

4. The rolling scored balloon according to claim 2, characterized in that: A rack (12) is provided on the guide rail (4), the roller shaft is a gear (13), and the rack (12) is meshed with the gear (13).

5. The rolling scored balloon according to claim 4, characterized in that: The rolling element is a multi-impeller (14), which comprises a sleeve mounted on the gear (13) and a plurality of tooth plates (15) connected to the outer periphery of the sleeve, and each of the tooth plates (15) is provided with the groove.

6. The rolling scored balloon according to claim 5, characterized in that: The tooth piece (15) is in an arc shape that bends inwardly, and the outer diameter of the tooth piece (15) gradually decreases from the inside to the outside.

7. The rolling scored balloon according to claim 4, characterized in that: The two fixing rings are both sleeved on the gear (13), the fixing ring is a gear shaft sleeve (20), and the two gear shaft sleeves (20) are both provided with elastic members (18), and the elastic members (18) extend toward the far end and are fixed on the end wall of the guide rail (4).

8. The rolling scored balloon according to any one of claims 1 to 7, characterized in that: The drug loading groove (5) is V-shaped.

9. The rolling scored balloon according to any one of claims 1 to 7, characterized in that: The balloon (2) is a structure with a cylindrical middle and conical ends. The cylindrical structure in the middle of the balloon (2) is a working section, and the conical ends of the balloon (2) are non-working sections. At least two guide rails (4) are provided. The length direction of the guide rails (4) is arranged along the axial direction of the balloon (2). One end of the guide rail (4) is fixed to the terminal tube at the distal end of the catheter (1), and the other end of the guide rail (4) is fixed to the proximal end of the working section of the balloon (2); each guide rail (4) is rollably provided with the notched member (3).

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