Catheter assembly and medical device

Abstract

The utility model provides a kind of catheter assembly and medical equipment.Catheter assembly includes first tube body and shock wave generation component.First tube body is formed with first accommodating cavity.Shock wave generation component includes at least two discharge parts, at least two discharge parts are spaced apart and set to the distal end in first accommodating cavity along the length direction of first tube body, at least two adjacent discharge parts form discharge region, to produce shock wave in liquid medium in first accommodating cavity.Wherein, discharge region is parallel to the central axis of first tube body, and at least part discharge region and the central axis of first tube body are overlapped.Such ensure that catheter assembly can have smaller size in radial direction, effectively improve the practicability of catheter assembly.In the treatment of blood vessel calcification lesion using catheter assembly, catheter assembly can directly pass through relatively narrow lesion site, effectively simplify the treatment step, reduce the cost required for treatment, and improve the experience of patient use.

Description

Technical Field

[0001] This utility model relates to the technical field of intravascular interventional devices, specifically to a catheter assembly and medical device. Background Technology

[0002] In the treatment of vascular stenosis, balloon catheter interventional surgery is increasingly accepted by doctors and patients due to its advantages of minimal invasiveness, good efficacy, and few side effects. However, for cases of severe vascular calcification, conventional balloon catheters, and even interventional devices such as cutting balloon catheters and rotational atherectomy devices, cannot achieve sufficiently satisfactory therapeutic results due to their respective limitations. For deep vascular calcification lesions, shockwave balloon catheters, because they can lyse deep calcified tissue without damaging blood vessels and other soft tissues, have a very good therapeutic effect on highly calcified vascular tissue, and therefore have a very broad prospect for development in interventional therapy.

[0003] However, current shockwave balloon catheters have the shockwave-emitting device located on the outer wall of the catheter, resulting in a large radial dimension. In actual use, this makes it difficult to pass through occlusive lesions or even lesions with high stenosis rates. Currently, in clinical practice, it is usually necessary to open the highly stenotic lesion site with a regular balloon catheter before use. This increases the complexity of the surgery and the cost of treatment, and leads to a poor user experience for patients. Utility Model Content

[0004] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a conduit assembly is provided. The conduit assembly includes a first tube body and a shock wave generating assembly. A first receiving cavity is formed within the first tube body. The shock wave generating assembly includes at least two discharge elements, which are spaced apart along the length of the first tube body at the distal end of the first receiving cavity. A discharge region is formed between at least two adjacent discharge elements to generate a shock wave in the liquid medium within the first receiving cavity. The discharge region is parallel to the central axis of the first tube body, and at least a portion of the discharge region overlaps with the central axis of the first tube body.

[0005] The catheter assembly of this invention includes a shock wave generating assembly comprising at least two discharge elements that are spaced apart along the length of the first tube body within a first receiving cavity. This reduces the radial dimension occupied by the shock wave generating assembly. Furthermore, the discharge area formed between the two discharge elements is parallel to the central axis of the first tube body, and at least a portion of the discharge area overlaps with the central axis. This ensures that the discharge area is close to the central axis of the first tube body, further guaranteeing a smaller radial dimension for the catheter assembly and effectively improving its practicality. When using the catheter assembly to treat vascular calcification lesions, the assembly can directly pass through relatively narrow lesion sites, effectively simplifying the treatment process, reducing treatment costs, and improving the patient's experience.

[0006] For example, at least two discharge devices include a first discharge device and a second discharge device, one of which is connected to the positive terminal of the power supply through a first conductive element, and the other is connected to the negative terminal of the power supply through a second conductive element.

[0007] For example, the first discharge element includes a first base and a first discharge part connected to each other, and the second discharge element includes a second base and a second discharge part connected to each other. The first discharge part is disposed on the side of the first base near the second base, and the second discharge part is disposed on the side of the second base near the first base.

[0008] For example, the shock wave generating assembly further includes a limiting member, the two ends of which are respectively connected to the first discharge member and the second discharge member to define the relative positional relationship between the first discharge member and the second discharge member.

[0009] For example, there are multiple limiting members, which are arranged at circumferential intervals along the first discharge member and the second discharge member.

[0010] For example, the first discharge element and the second discharge element are respectively provided with grooves adapted to the limiting element along their circumferential direction, and the two ends of the limiting element are respectively inserted into the grooves.

[0011] For example, the discharge region is an elongated region and is parallel to the central axis of the first tube.

[0012] For example, the conduit assembly further includes a seal disposed in the first receiving cavity, and an exhaust port communicating with the first receiving cavity is formed on the distal end of the first tube body. The seal is disposed closer to the exhaust port than the shock wave generating assembly. The seal includes a magnetic attraction portion. The seal is configured such that when the magnetic attraction portion acts on the magnetic attraction portion, the magnetic attraction portion drives the seal to move from the first position to the second position to block the exhaust port.

[0013] For example, the seal also includes a blocking part, and a magnetic part is disposed at the distal end of the blocking part. The shape of the blocking part is adapted to the shape of the distal end of the first tube. When the magnetic part acts on the magnetic part, the blocking part blocks the exhaust port under the action of the magnetic part.

[0014] For example, the seal is connected to the shock wave generating assembly so as to drive the shock wave generating assembly to move via the seal.

[0015] For example, the seal is independent of the shock wave generating assembly, and the seal moves away from the shock wave generating assembly when subjected to force.

[0016] For example, there are multiple shock wave generating components, which are spaced apart in the first receiving cavity along the length direction of the first tube.

[0017] For example, the catheter assembly further includes a second tube body disposed within the first receiving cavity, the second tube body having a second receiving cavity formed therein, an inlet formed on the proximal sidewall of the first tube body, an outlet formed on the distal sidewall of the first tube body, and the two ends of the second receiving cavity communicating with the inlet and the outlet, respectively.

[0018] For example, a liquid injection port communicating with the first receiving cavity is provided on the proximal side wall of the first tube body, and the liquid medium fills the first receiving cavity through the liquid injection port.

[0019] According to another aspect of the present invention, a medical device is also provided, including a main unit and a catheter assembly as described above. The main unit is electrically connected to a shock wave generating assembly, and the main unit is used to send an electrical excitation signal to the shock wave generating assembly to excite the shock wave generating assembly to generate shock waves in a liquid medium.

[0020] The medical device of this invention has the beneficial effects of the aforementioned catheter assembly. In addition, the main unit can precisely control the timing and intensity of the shock wave emitted by the shock wave generating component, thereby achieving high-precision control of the catheter assembly.

[0021] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0022] The above and other objects, features, and advantages of this utility model will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this utility model and form part of the specification. They are used together with the embodiments of this utility model to explain the utility model and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0023] Figure 1 A schematic diagram of the structure of a medical device including a catheter assembly according to an exemplary embodiment of the present invention is shown;

[0024] Figure 2 A perspective view of a first tube body according to an exemplary embodiment of the present invention is shown;

[0025] Figure 3 A partial perspective view of a catheter assembly according to an exemplary embodiment of the present invention is shown.

[0026] The components indicated by the reference numerals in the figures are as follows:

[0027] 1. First tube body; 11. First receiving cavity; 12. Outlet; 13. Tube body; 14. Tube tip; 15. Exhaust port; 2. Shock wave generating assembly; 21. First discharge element; 211. First base; 212. First discharge section; 22. Second discharge element; 221. Second base; 222. Second discharge section; 231. First conductive element; 232. Second conductive element; 24. Limiting element; 3. Sealing element; 31. Magnetic suction part; 32. Blocking part; 4. Second tube body; 41. Second receiving cavity; 5. Main unit. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model more apparent, exemplary embodiments according to this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this utility model, and not all embodiments of this utility model. It should be understood that this utility model is not limited to the exemplary embodiments described herein. Based on the embodiments of this utility model described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this utility model.

[0029] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0030] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0031] One embodiment of this utility model provides a catheter assembly that can have a smaller size in the radial direction, effectively improving the practicality of the catheter assembly. The following will describe in detail a catheter assembly according to an embodiment of this utility model with reference to the accompanying drawings.

[0032] like Figure 1 and Figure 2 As shown, the conduit assembly includes a first tube body 1, a shock wave generating assembly 2, and a sealing element 3. A first receiving cavity 11 is formed within the first tube body 1. The shock wave generating assembly 2 includes at least two discharge elements, which are spaced apart along the length of the first tube body 1 at the distal end within the first receiving cavity 11. A discharge region is formed between at least two adjacent discharge elements to generate a shock wave in the liquid medium within the first receiving cavity 11. At least a portion of the discharge region overlaps with the central axis of the first tube body 1.

[0033] It should be noted that, Figure 1 The catheter assembly shown is a simplified depiction; the actual catheter assembly is a long tubular structure, with an overall length exceeding one meter, to allow for deep insertion into the blood vessel. During insertion, the proximal end of the catheter assembly can be outside the patient's body, while the distal end can be inside.

[0034] There are at least two discharge elements. If there are two discharge elements, a discharge area is formed between these two discharge elements. If there are three or more discharge elements, a discharge area can be formed between every two adjacent discharge elements, or a discharge area can be formed between some of the adjacent discharge elements. For example, when there are four discharge elements, a discharge area is formed between the first and second discharge elements, a discharge area is formed between the third and fourth discharge elements, and a discharge area may or may not be formed between the second and third discharge elements.

[0035] The distal end can be represented as the end furthest from the operator. Similarly, the proximal end can be represented as the end closest to the operator.

[0036] The first tube body 1 may include a tube body 13 and a tube tip 14. The first tube body 1 with the tube tip 14 can easily pass through the blood vessel. The tube body 13 and the tube tip 14 may be detachably connected or integrally formed. The detachable connection may include a plug connection or an adhesive connection, etc. This application does not make specific limitations in this regard.

[0037] The first tube 1 can be made of a flexible material, specifically linear nylon. This application does not impose any specific limitations; any flexible material with bio-friendly properties is acceptable.

[0038] The liquid medium can be a sodium chloride solution, a contrast agent solution, or a mixture of the two; this application does not specifically limit this.

[0039] Shock wave generating component 2 can generate a hydroelectric effect in a liquid medium. Specifically, the shock wave generating component 2 located in the liquid medium can output a high-voltage electric field under the action of a power source. When the high-voltage electric field passes through the liquid medium, it can generate energy and vaporize, expand, and cause an explosion in the nearby liquid medium, thereby achieving discharge and generating a shock wave.

[0040] Traditional balloon catheters are relatively large in the radial direction, making it difficult to pass through narrower blood vessels. The catheter assembly of this application eliminates the balloon and arranges at least two discharge elements for emitting shock waves along the length of the first tube 1, reducing the space occupied by the discharge elements in the radial direction and thus reducing the size of the catheter assembly in the radial direction. This allows the catheter assembly to pass through narrower blood vessels smoothly.

[0041] The catheter assembly of this invention includes a shock wave generating assembly 2 in which at least two discharge elements are spaced apart along the length of the first tube 1 within the first receiving cavity 11 of the first tube 1. This reduces the radial dimension occupied by the shock wave generating assembly 2. Furthermore, the discharge area formed between the two discharge elements is parallel to the central axis of the first tube 1, and at least a portion of the discharge area overlaps with the central axis. This ensures that the discharge area is close to the central axis of the first tube 1, further guaranteeing a smaller radial dimension for the catheter assembly and effectively improving its practicality. When using the catheter assembly to treat vascular calcification lesions, the catheter assembly can directly pass through relatively narrow lesion sites, effectively simplifying the treatment process, reducing treatment costs, and improving the patient's experience.

[0042] In some embodiments, the discharge region can be of any shape and position overlapping the central axis. It can be elongated, square, circular, etc. The central axis of the discharge region may or may not coincide with the central axis; if they do not coincide, they may be at a certain angle.

[0043] For example, the discharge region can be an elongated region parallel to the central axis of the first tube 1. Further, the width of the discharge region in the radial direction of the conduit can be very small, i.e., elongated, and the discharge region coincides with the central axis of the first tube 1. Alternatively, the discharge region can also have a certain width in the radial direction of the conduit, and the central axis of the discharge region is parallel to the central axis of the conduit. Further, the shape of the discharge region can be such that its center coincides with or deviates from the central axis, and the discharge region also includes a portion outside the central axis. The overlap of the discharge region with the central axis allows the discharge region to be positioned as centrally as possible, thereby achieving uniform radial discharge, and enabling the successful lysis of calcifications located around the conduit without rotating the conduit.

[0044] In some embodiments, such as Figure 3 As shown, at least two discharge devices include a first discharge device 21 and a second discharge device 22. One of the first discharge device 21 and the second discharge device 22 is connected to the positive terminal of the power supply through a first conductive element 231, and the other is connected to the negative terminal of the power supply through a second conductive element 232.

[0045] The shock wave generating component 2 can be connected to a power source through the first conductive element 231 and the second conductive element 232, thereby enabling the power source to supply electrical energy to the shock wave generating component 2. Specifically, the first discharge element 21 and the second discharge element 22 can be connected to the positive and negative terminals of the power source, respectively, to form a conductive path.

[0046] like Figure 3 As shown, the first discharge element 21 is closer to the distal end of the first receiving cavity 11 than the second discharge element 22. In embodiments not shown, the second discharge element 22 may be closer to the distal end of the first receiving cavity 11 than the first discharge element 21, and this application does not specifically limit this.

[0047] The first discharge element 21 and the second discharge element 22 can be made of conductive metal materials such as stainless steel, platinum-iridium alloy or nickel-titanium alloy, or flexible conductive materials such as graphite. This application does not make specific limitations in this regard.

[0048] A discharge region can be formed between the first discharge element 21 and the second discharge element 22. When electrical energy is supplied to the conductive element 23 through the power source, the generated current can break down the liquid medium in the discharge region, thereby causing the liquid medium in the discharge region to undergo a hydroelectric effect and generate a shock wave.

[0049] The first conductive element 231 or the second conductive element 232 can be a wire, and the shape of the first conductive element 231 or the second conductive element 232 can be flat, thereby further reducing the size of the conduit assembly in the radial direction.

[0050] In the above embodiments, the first discharge element 21 and the second discharge element 22 can be spaced apart along the length of the first tube 1 to form a discharge area. This not only enables the shock wave generating component 2 to generate shock waves, but also simplifies the connection structure of the shock wave generating component 2, reduces the volume occupied by the shock wave generating component 2, and further improves the layout rationality of the conduit assembly.

[0051] In some embodiments, such as Figure 3 As shown, the first discharge element 21 includes a first base 211 and a first discharge part 212 connected to each other, and the second discharge element 22 includes a second base 221 and a second discharge part 222 connected to each other. The first discharge part 212 is disposed on the side of the first base 211 close to the second base 221, and the second discharge part 222 is disposed on the side of the second base 221 close to the first base 211.

[0052] The first base 211 and the second base 221 can be cylindrical in shape. The cylindrical shape of the first base 211 and the second base 221 can give the first discharge element 21 and the second discharge element 22 higher stability. The first discharge part 212 and the second discharge part 222 can be conical in shape, so that the first discharge part 212 and the second discharge part 222 can be close to each other to form a discharge area.

[0053] The ends of the first discharge section 212 and the second discharge section 222 that are close to each other can be formed with discharge ends. This application does not specifically limit the shape of the discharge ends of the first discharge section 212 and the second discharge section 222. When the first discharge element 21 is connected to the positive terminal of the power supply and the second discharge element 22 is connected to the negative terminal of the power supply, the shape of the discharge end of the first discharge section 212 can be needle-like, and the shape of the discharge end of the second discharge section 222 can be hemispherical. The needle-like positive terminal can concentrate the generated electric field, and the hemispherical negative terminal can reduce arc deviation and instability, effectively improving the discharge efficiency of the shock wave generating assembly 2. Exemplarily, the discharge ends of the first discharge section 212 and the second discharge section 222 can be located on the central axis of the conduit or deviated from the central axis.

[0054] In the above embodiment, the discharge region between the first discharge element 21 and the second discharge element 22 can be formed by the first discharge portion 212 and the second discharge portion 222 being close together. This can reduce the voltage required to break down the discharge region, thereby effectively reducing the voltage required for the input shock wave generating component 2, improving the safety of the conduit assembly and reducing energy consumption.

[0055] In some embodiments, such as Figure 3As shown, the shock wave generating assembly 2 also includes a limiting member 24, the two ends of which are connected to the first discharge member 21 and the second discharge member 22 respectively, so as to limit the relative positional relationship between the first discharge member 21 and the second discharge member 22.

[0056] The limiting member 24 can be made of insulating material and can be rod-shaped. The two ends of the rod-shaped limiting member 24 can be connected to the first discharge member 21 and the second discharge member 22 respectively, so that a fixed gap is formed between the first discharge member 21 and the second discharge member 22, avoiding the effect of the shock wave caused by the distance between the two being too large or too small.

[0057] In the above embodiments, the limiting member 24 can ensure that the discharge area between the first discharge member 21 and the second discharge member 22 remains constant, avoiding the shock wave generating component 2 from being unable to emit shock waves or having poor shock wave effects due to the offset or misalignment of the relative positions between the first discharge member 21 and the second discharge member 22, thus effectively improving the reliability of the shock wave generating component 2.

[0058] In some embodiments, such as Figure 3 As shown, there are multiple limiting members 24, which are spaced apart circumferentially along the first discharge member 21 and the second discharge member 22.

[0059] The aforementioned multiple limiting members 24 are arranged circumferentially around the first discharge member 21 and the second discharge member 22. The shock wave formed by the cooperation of the first discharge member 21 and the second discharge member 22 has diffraction characteristics. That is, when the first discharge member 21 and the second discharge member 22 generate shock waves and emit them outward, the shock waves can bypass the limiting members 24 and continue to propagate. Thus, the limiting members 24 will not interfere with the shock waves or cause their intensity to decrease. Of course, users should also determine the number or size of the limiting members 24 according to the actual usage to avoid the situation where the shock waves cannot bypass the limiting members 24 due to an excessive number of limiting members 24 or an excessively large width.

[0060] In the above embodiments, multiple limiting members 24 can be arranged circumferentially between the first discharge member 21 and the second discharge member 22, thereby effectively improving the overall structural strength of the shock wave generating component 2 and further improving the reliability of the shock wave generating component 2.

[0061] In some embodiments, such as Figure 3 As shown, the first discharge element 21 and the second discharge element 22 are respectively provided with grooves that are adapted to the limiting element 24 along their circumferential direction, and the two ends of the limiting element 24 are respectively inserted into the grooves.

[0062] The groove can be formed on the sidewalls of the first discharge element 21 and the second discharge element 22 in the circumferential direction. The two ends of the limiting member 24 can be partially inserted into the groove or entirely embedded in the groove. Preferably, the two ends of the limiting member 24 are entirely embedded in the groove so that the limiting member 24 does not protrude from the first discharge element 21 and the second discharge element 22 in the radial direction.

[0063] For example, the grooves may also be provided on the sidewalls of the first base 211 and the second base 221 in the circumferential direction, respectively.

[0064] In an embodiment not shown, the first base 211 and the second base 221 may each have insertion holes formed thereon. The two ends of the limiting member 24 may pass through the first discharge part 212 and the second discharge part 222 respectively and be inserted into the insertion holes, thereby connecting the first discharge member 21 and the second discharge member 22.

[0065] In the above embodiment, the two ends of the limiting member 24 are respectively inserted into the grooves in the circumferential direction of the first discharge member 21 and the second discharge member 22. In this way, not only can the first discharge member 21 and the second discharge member 22 be connected by the limiting member 24, but the limiting member 24 can also be prevented from protruding from the first discharge member 21 and the second discharge member 22, thus further ensuring the size of the shock wave generating assembly 2 in the radial direction.

[0066] In some embodiments, such as Figures 1 to 3 As shown, the conduit assembly also includes a sealing member 3 disposed in the first receiving cavity 11. An exhaust port 15 communicating with the first receiving cavity 11 is formed on the distal end of the first tube body 1. The sealing member 3 is disposed closer to the exhaust port 15 than the shock wave generating assembly 2. The sealing member 3 includes a magnetic suction part 31. The sealing member 3 is configured such that when the magnetic suction member acts on the magnetic suction part 31, the magnetic suction part 31 drives the sealing member 3 to move from the first position to the second position to block the exhaust port 15.

[0067] The exhaust port 15 can be located at the distal end of the first pipe body 1 or at the tip 14; this application does not specifically limit its location. For example, as shown... Figure 2 As shown, the exhaust port 15 can be provided on the tip of the pipe 14. Specifically, there can be a distance L between the exhaust port 15 and the far end of the first pipe body 1. The distance L can be 15 mm.

[0068] The first position and the second position can be respectively represented as different positional relationships between the seal 3 and the exhaust port 15. The first position is closer to the exhaust port 15 than the second position. When the seal 3 is in the first position, it can be separated from the exhaust port 15. When the seal 3 is in the second position, it can abut against the exhaust port 15.

[0069] When the seal 3 is in the first position, a gap can be formed between the seal 3 and the cavity wall of the first receiving cavity 11. When liquid medium is injected into the first receiving cavity 11, the liquid medium can flow into the distal end of the first receiving cavity 11 through the gap. After the seal 3 moves from the first position to the second position under magnetic attraction, the seal 3 can push the liquid medium to squeeze the gas in the distal end of the first receiving cavity 11 out through the exhaust port 15 and block the exhaust port 15. At this time, the liquid medium located in the proximal end of the first receiving cavity 11 can form a certain pressure on the seal 3, thereby confining the seal 3 to the second position. When the seal 3 is in the second position, liquid medium can be continuously added to the first receiving cavity 11 to increase the pressure in the first receiving cavity 11 to 4 standard atmospheres (atm) to meet the discharge requirements of the first discharge element 21 and the second discharge element 22.

[0070] The aforementioned magnetic attractor can specifically be a metal rod. The metal rod can generate a magnetic attraction with the magnetic attractor 31. By using the metal rod to approach the magnetic attractor 31 of the sealing member 3, the sealing member 3 can be moved from the first position to the second position. When using the catheter assembly for interventional treatment of vascular calcification lesions, the metal rod can be used to perform the air venting operation of the catheter assembly before it is inserted into the patient's body. This not only facilitates the air venting operation of the catheter assembly but also reduces the time required for the interventional treatment process, effectively improving the patient's comfort and experience.

[0071] Of course, after the catheter assembly is placed into the patient's body, external means such as X-ray scanning or B-ultrasound scanning can be used to determine the specific location of the catheter assembly. After determining the specific location and long axis direction of the catheter assembly, a metal rod is placed close to the catheter assembly outside the patient's body to drive the seal 3 inside the catheter assembly to move along the long axis direction.

[0072] Compared to traditional balloon catheters, the catheter assembly of this application can expel gas from the catheter via the vent 15, thereby avoiding the degradation of the liquid medium's performance due to gas, which would reduce the effectiveness of the shock wave generated by the shock wave generating component 2, and improving the overall stability of the catheter assembly when generating shock waves. Furthermore, the venting operation of the catheter assembly can be performed outside the patient's body, significantly reducing the time required for interventional procedures and effectively improving the safety of interventional procedures and the patient's experience.

[0073] In the above embodiments, the seal 3 can be moved from the first position to the second position by the magnetic attraction part 31 under the magnetic attraction. Through the design of the magnetic attraction part 31, the displacement of the seal 3 can be achieved without complex mechanical devices or manual operation, which simplifies the process of venting the conduit assembly and effectively improves the convenience of using the conduit assembly.

[0074] In some embodiments, such as Figure 2 and Figure 3 As shown, the sealing member 3 also includes a blocking part 32, and a magnetic suction part 31 is disposed at the far end of the blocking part 32. The shape of the blocking part 32 is adapted to the shape of the far end of the first tube body 1. When the magnetic suction member acts on the magnetic suction part 31, the blocking part 32 blocks the exhaust port 15 under the drive of the magnetic suction part 31.

[0075] The magnetic part 31 and the sealing part 32 can be detachably connected or integrally formed. The detachable connection can include plug-in connection or adhesive connection, etc., and this application does not make specific limitations in this regard.

[0076] The shape of the sealing part 32 can be adapted to the shape of the distal end of the first tube 1, so that when the seal 3 is in the second position, the sealing part 32 can fit tightly against the inner wall of the distal end of the first tube 1 and seal the exhaust port 15. In this way, the gas at the distal end of the first tube 1 can be discharged through the exhaust port 15, which not only avoids the residual gas in the first receiving cavity 11, but also makes the pressure between the sealing part 32 and the inner wall of the distal end of the first tube 1 less than the pressure of the liquid medium acting on the sealing part 32, thereby more firmly fixing the seal 3 in the second position.

[0077] In the above embodiment, the shape of the sealing part 32 can be adapted to the shape of the distal end of the first tube 1. Thus, when the sealing part 32 moves to the second position under the action of the magnetic suction part 31, the outer wall of the sealing part 32 can be completely fitted with the inner wall of the distal end of the first tube 1, thereby achieving a better sealing effect, avoiding the residue of gas in the first receiving cavity 11, and effectively improving the reliability and safety of the catheter assembly.

[0078] In some embodiments, such as Figure 3 As shown, the seal 3 is connected to the shock wave generating component 2 so as to drive the shock wave generating component to move via the seal 3.

[0079] The seal 3 and the shock wave generating component 2 can be connected by adhesive bonding or snap-fit ​​connection, and this application does not make specific limitations in this regard.

[0080] In the above embodiment, when the sealing member 3 moves from the first position to the second position, it can drive the shock wave generating component 2 to move synchronously toward the distal end of the first tube 1. In this way, when using the catheter assembly for interventional surgery, the shock wave generating component 2 is closer to the distal end of the first tube 1, so that the shock wave generated by the shock wave generating component 2 can better act on the target position in the blood vessel, effectively improving the use effect of the catheter assembly.

[0081] In some embodiments, the seal 3 is independent of the shock wave generating component 2, and the seal 3 moves away from the shock wave generating component 2 when subjected to force.

[0082] The shock wave generating component 2 can be fixed to the inner wall of the first tube 1 by adhesive connection or snap-fit ​​connection. This application does not specify the fixing method of the shock wave generating component 2.

[0083] In the above embodiments, the independent arrangement between the seal 3 and the shock wave generating component 2 can reduce the influence and interference of the seal 3 on the shock wave generating component 2 when it moves, so that the shock wave generating component 2 is not affected by the position change of the seal 3, thereby achieving more precise control over the shock wave generated by the shock wave generating component 2, and further improving the reliability and safety of the conduit assembly.

[0084] In some embodiments, there are multiple shock wave generating components 2, and the multiple shock wave generating components 2 are spaced apart in the first receiving cavity 11 along the length direction of the first tube body 1.

[0085] When the catheter assembly is used to treat intravascular calcified lesions, the operator can determine the number of shock wave generating components 2 according to actual needs and usage scenarios. For example, when a strong shock wave needs to be emitted towards the intravascular calcified lesion, multiple shock wave generating components 2 can be spaced apart on the first receiving cavity 11. The intensity of the emitted shock wave is increased by superimposing the shock waves generated by multiple shock wave generating components 2. Alternatively, when the area of ​​the intravascular calcified lesion is large, multiple shock wave generating components 2 can be used to emit shock waves simultaneously to improve the ability to treat multiple calcified lesions at the same time.

[0086] In the above embodiments, multiple shock wave generating components 2 can be spaced apart on the first receiving cavity 11 to improve the intensity of the generated shock waves and the efficiency of treating intravascular calcified lesions. This allows the catheter assembly to be applied to different usage scenarios and needs, further enhancing its practicality and versatility.

[0087] In some embodiments, such as Figure 1 As shown, the catheter assembly also includes a second tube 4, which is disposed within the first receiving cavity 11. A second receiving cavity 41 is formed within the second tube 4. An inlet (not shown in the figure) is formed on the proximal sidewall of the first tube 1, and an outlet 12 is formed on the distal sidewall of the first tube 1. The two ends of the second receiving cavity 41 are connected to the inlet and the outlet 12, respectively.

[0088] The aforementioned second receiving cavity 41 can be used to insert an interventional device with a slender shape. Specifically, the interventional device can be a guide wire, a puncture needle, or a sampling needle, etc. This application does not make any specific limitation on this.

[0089] When using the catheter assembly for vascular interventional treatment, the second receiving lumen 41 can be used to insert a guidewire. Specifically, the guidewire is first inserted into the target location within the blood vessel, and then the catheter assembly is inserted onto the guidewire through the inlet and outlet 12. The guidewire can then be used to guide the catheter assembly to the target location.

[0090] In the above embodiments, the catheter assembly can be conveniently inserted into the interventional device through the inlet and outlet 12 provided on the first tube 1, and then the interventional device can transport the catheter assembly to the target position, which effectively simplifies the operation steps when using the catheter assembly for treatment and improves the convenience of using the catheter assembly.

[0091] In some embodiments, a liquid injection port (not shown in the figure) communicating with the first receiving cavity 11 is provided on the proximal side wall of the first tube 1, and the liquid medium fills the first receiving cavity 11 through the liquid injection port.

[0092] In the above embodiments, liquid media can be directly injected into the first receiving cavity 11 through the injection port, which effectively simplifies the operation process of adding liquid media and improves the efficiency of the catheter assembly.

[0093] According to another aspect of this utility model, such as Figure 1 As shown, a medical device is also provided, including a host 5 and a catheter assembly as described above. The host 5 is electrically connected to the shock wave generating assembly 2. The host 5 is used to send an electrical excitation signal to the shock wave generating assembly 2 to excite the shock wave generating assembly 2 to generate shock waves in a liquid medium.

[0094] The catheter assembly can be electrically connected to the main unit 5 via wires. The main unit 5 can send an electrical excitation signal to the shock wave generating component 2, thereby providing a basis for the stable operation of the catheter assembly and effectively ensuring the accuracy and reliability of medical device control.

[0095] In some embodiments, a power supply is provided in the host, which is electrically connected to the shock wave generating component 2 to send an electrical excitation signal to the shock wave generating component 2.

[0096] The medical device of this invention has the beneficial effects of the aforementioned catheter assembly. In addition, the host 5 can precisely control the timing and intensity of the shock wave emitted by the shock wave generating component 2, thereby achieving high-precision control of the catheter assembly.

[0097] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that these exemplary embodiments are merely illustrative and are not intended to limit the scope of the invention. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as claimed in the appended claims.

[0098] For ease of description, the term "connection" may be used herein to describe the relationship between one or more elements or features shown in the figure and other elements or features. It should be understood that "connection" may include direct connections or indirect connections via other elements or features, and this document is intended to encompass all such cases.

[0099] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0100] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0101] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A catheter assembly, characterized in that, include: A first tube body, wherein a first receiving cavity is formed within the first tube body; as well as A shock wave generating assembly includes at least two discharge elements, which are spaced apart along the length of the first tube and located at the distal end of the first receiving cavity. A discharge region is formed between at least two adjacent discharge elements to generate a shock wave in the liquid medium within the first receiving cavity. At least a portion of the discharge region overlaps with the central axis of the first tube.

2. The catheter assembly according to claim 1, characterized in that, The at least two discharge devices include a first discharge device and a second discharge device, wherein one of the first discharge device and the second discharge device is connected to the positive terminal of the power supply through a first conductive element, and the other is connected to the negative terminal of the power supply through a second conductive element.

3. The catheter assembly according to claim 2, characterized in that, The first discharge element includes a first base and a first discharge part connected to each other, and the second discharge element includes a second base and a second discharge part connected to each other. The first discharge part is disposed on the side of the first base near the second base, and the second discharge part is disposed on the side of the second base near the first base.

4. The catheter assembly according to claim 2, characterized in that, The shock wave generating component also includes a limiting member, the two ends of which are respectively connected to the first discharge member and the second discharge member to limit the relative positional relationship between the first discharge member and the second discharge member.

5. The catheter assembly according to claim 4, characterized in that, There are multiple limiting members, which are arranged at intervals along the circumference of the first discharge member and the second discharge member.

6. The catheter assembly according to claim 4, characterized in that, The first discharge element and the second discharge element are respectively provided with grooves that are adapted to the limiting element along their circumferential direction, and the two ends of the limiting element are respectively inserted into the grooves.

7. The catheter assembly according to claim 1, characterized in that, The discharge region is an elongated region and is parallel to the central axis of the first tube.

8. The catheter assembly according to claim 1, characterized in that, The conduit assembly further includes a sealing element disposed within the first receiving cavity. An exhaust port communicating with the first receiving cavity is formed on the distal end of the first tube body. The sealing element is disposed closer to the exhaust port than the shock wave generating assembly. The sealing element includes a magnetic suction part. The sealing element is configured such that when the magnetic suction part acts on the magnetic suction part, the magnetic suction part drives the sealing element to move from a first position to a second position to block the exhaust port.

9. The catheter assembly according to claim 8, characterized in that, The sealing element also includes a blocking part, and the magnetic suction part is disposed at the distal end of the blocking part. The shape of the blocking part is adapted to the shape of the distal end of the first tube body. When the magnetic suction element acts on the magnetic suction part, the blocking part blocks the exhaust port under the action of the magnetic suction part.

10. The catheter assembly according to claim 8, characterized in that, The seal is connected to the shock wave generating component so as to drive the shock wave generating component to move via the seal.

11. The catheter assembly according to claim 8, characterized in that, The seal is independent of the shock wave generating component, and the seal moves away from the shock wave generating component when subjected to force.

12. The catheter assembly according to claim 1, characterized in that, The shock wave generating components are multiple, and the multiple shock wave generating components are spaced apart in the first receiving cavity along the length direction of the first tube.

13. The catheter assembly according to claim 1, characterized in that, The catheter assembly also includes a second tube body disposed within the first receiving cavity. A second receiving cavity is formed within the second tube body. An inlet is formed on the proximal sidewall of the first tube body, and an outlet is formed on the distal sidewall of the first tube body. The two ends of the second receiving cavity are respectively connected to the inlet and the outlet.

14. The catheter assembly according to claim 1, characterized in that, The first tube has a liquid injection port on its proximal side wall that communicates with the first receiving cavity, and the liquid medium fills the first receiving cavity through the liquid injection port.

15. A medical device, characterized in that, The device includes a host and a conduit assembly as described in any one of claims 1 to 14, wherein the host is electrically connected to the shock wave generating assembly, and the host is configured to send an electrical excitation signal to the shock wave generating assembly to excite the shock wave generating assembly to generate a shock wave in a liquid medium.

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