Plaque resection catheter and plaque resection device

Abstract

The utility model discloses a plaque resection catheter and a plaque resection device.The plaque resection catheter comprises a multi-way connector and a sleeve, and the multi-way connector comprises a first connector, a second connector, a third connector and a fourth connector; a first open hole, a second open hole, a third open hole and a fourth open hole are respectively formed in the first connector, the second connector, the third connector and the fourth connector, and the first open hole is communicated with the second open hole; a first channel, a second channel and a third channel which are independently arranged are arranged in the sleeve, the first channel is communicated with the second opening, the second channel is communicated with the third opening, and the third channel is communicated with the fourth opening. In the embodiment of the invention, the multi-way connector and the sleeve are relatively simple in structure and relatively easy to process, and the multi-way connector and the sleeve are relatively simple and convenient to assemble, so that the manufacturing cost of the plaque excision catheter is reduced.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, specifically relating to a plaque resection catheter and a plaque resection device. Background Technology

[0002] Vascular plaques are lesions formed by the deposition of lipids in the vascular endothelium, which can lead to serious consequences such as vascular stenosis, thrombosis, and myocardial infarction or cerebral infarction. Plaque resection surgery can permanently remove vascular plaques through mechanical resection, restoring the lumen and access to the body's own blood vessels. Plaque resection catheters play an important role in plaque resection surgery, for example, for inserting guide wires or drive shafts, or for drug delivery and drainage. In related technologies, plaque resection catheters have a relatively complex structural design to meet various functional requirements, and their fabrication and assembly are quite challenging. Utility Model Content

[0003] This application aims to provide a plaque resection catheter and a plaque resection device to simplify the structure of the plaque resection catheter and reduce the difficulty of processing and assembly.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, embodiments of this application provide a plaque resection catheter, comprising:

[0006] A multi-port connector includes a first connector, a second connector, a third connector, and a fourth connector. The first connector has a first opening, the second connector has a second opening, the third connector has a third opening, and the fourth connector has a fourth opening. The first opening and the second opening are connected, and the inner diameter of the first opening is larger than the inner diameter of the second opening to form a transition surface between the first opening and the second opening. The third opening and the fourth opening independently penetrate the transition surface to connect to the first opening.

[0007] The sleeve has independently arranged first, second and third channels. One end of the sleeve is embedded in the first opening and abuts against the transition surface so that the first channel communicates with the second opening, the second channel communicates with the third opening, and the third channel communicates with the fourth opening.

[0008] Secondly, embodiments of this application also provide a plaque removal device, comprising:

[0009] Such as the plaque resection catheter shown in the first aspect;

[0010] The rotary cutting assembly includes a drive shaft and a rotating cutter head. The drive shaft passes through a first channel and a second opening, and the rotating cutter head is connected to the drive shaft.

[0011] The plaque resection catheter provided in this application embodiment can form a channel for multiple functions in the plaque resection catheter through the connection and cooperation of the multi-port connector and the sleeve. At the same time, the structure of the multi-port connector and the sleeve is relatively simple, the processing is relatively easy, and the assembly between the two is also relatively simple and convenient, which helps to reduce the manufacturing cost of the plaque resection catheter.

[0012] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is a schematic diagram of the structure of the plaque resection catheter and the rotary cutting component assembled according to an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of a multi-port connector;

[0016] Figure 3 This is a schematic diagram of the assembled structure of the multi-port connector, sleeve, inlet pipe, and outlet pipe;

[0017] Figure 4 This is a schematic diagram of the cross-section of the sleeve;

[0018] Figure 5 This is a partial three-dimensional schematic diagram of the connection between the sleeve and the drive shaft;

[0019] Figure 6 This is a schematic diagram of the plaque removal device provided in the embodiments of this application;

[0020] Figure 7 This is a partial structural diagram of the rotary cutting component.

[0021] Reference numerals: 100-Multi-port connector, 110-First connector, 111-First opening, 120-Second connector, 121-Second opening, 130-Third connector, 131-Third opening, 140-Fourth connector, 141-Fourth opening, 150-Transition surface, 200-Sleeve, 210-First channel, 220-Second channel, 230-Third channel, 240-Opening groove, 311-Inlet pipe, 312-First pipe seat, 321-Outlet pipe, 322-Second pipe seat, 400-Vessel cutting assembly, 410-Drive shaft, 420-Rotating cutter head, 430-Drive motor, 440-Switch structure, 450-Power supply structure, 460-Coupling, 470-Housing, 510-Inlet drive component, 520-Outlet drive component. Detailed Implementation

[0022] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0024] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] like Figures 1 to 4 As shown in the embodiment of this application, a plaque resection catheter includes a multi-port connector 100 and a cannula 200.

[0027] The multi-port connector 100 includes a first connector 110, a second connector 120, a third connector 130, and a fourth connector 140. The first connector 110 has a first opening 111, the second connector 120 has a second opening 121, the third connector 130 has a third opening 131, and the fourth connector 140 has a fourth opening 141. The first opening 111 communicates with the second opening 121, and the inner diameter of the first opening 111 is larger than the inner diameter of the second opening 121, so that the first opening 111 and the second opening 121 communicate... A transition surface 150 is formed between the second openings 121. The third opening 131 and the fourth opening 141 penetrate the transition surface 150 independently to connect to the first opening 111. The sleeve 200 has independently arranged first channels 210, second channels 220 and third channels 230. One end of the sleeve 200 is embedded in the first opening 111 and abuts against the transition surface 150, so that the first channel 210 connects to the second opening 121, the second channel 220 connects to the third opening 131 and the third channel 231 connects to the fourth opening 141.

[0028] In some examples, the multi-port connector 100 may be integrally connected or otherwise linked together, comprising multiple connectors. Different connectors can be used to connect different structures to support different functions during plaque resection. For example, the first connector 110 and the second connector 120 can be used for the insertion and exit of the guide wire or the rotary cutting assembly 400; the third connector 130 can be used to connect to an external fluid delivery system to inject plaque-dissolving drugs or contrast agents into the blood vessel during the procedure; and the fourth connector 140 can be used to connect to a drainage system to remove the resected plaque outside the blood vessel. Of course, the above are some examples illustrating the possible functions of the various connectors of the multi-port connector 100. In practical applications, the functions of some connectors can be interchanged or used for other functions. Alternatively, in some feasible embodiments, the multi-port connector 100 may have even more connectors, which will not be listed here.

[0029] For the multi-port connector 100, each connector may have a corresponding opening. The correspondence between the connector and the opening has been defined above and will not be repeated here. In this embodiment, each opening in the multi-port connector 100 has a specific size and communication relationship. Specifically, the inner diameter of the first opening 111 is larger than the inner diameter of the second opening 121, so that a transition surface 150 is formed between the two openings. The transition surface 150 can be a plane perpendicular or substantially perpendicular to the axial direction of the first connector, or it can be a conical surface or an arc-shaped annular surface, etc., without specific limitation here. In some possible embodiments, the range of the transition surface 150 may also extend on the inner wall of the first opening 111 near the second opening 121.

[0030] The third opening 131 and the fourth opening 141 can each independently penetrate the transition surface 150 to communicate with the first opening 111. In this way, when the sleeve 200 is inserted into the first opening 111 of the multi-port connector 100, the third opening 131 and the second opening 121 can communicate with the corresponding channels in the sleeve 200. Specifically, in this embodiment, the cannula 200 may have three independently arranged channels. When one end of the cannula 200 is inserted into the first opening 111, the first channel 210 can be connected to the second opening 121 to form a channel through which, for example, a guide wire or a rotary cutting assembly 400 can pass. The second channel 220 is connected to the third opening 131. Thus, when the third connector 130 is connected to an external liquid delivery pipe, external liquid, such as a drug or contrast agent, can reach the blood vessel from the third opening 131 and the second channel 220. The third channel 230 is connected to the fourth opening 141. Thus, when the fourth connector 140 is connected to a drainage pipe, the shredded and dissolved plaque in the blood vessel can be discharged from the third channel 230 and the fourth opening 141.

[0031] In some preferred embodiments, the first channel 210, the second channel 220, and the third channel 230 in the cannula 200 are not interconnected to avoid adverse situations such as the medication not being effectively delivered to the plaque area. In some possible implementations, the first channel 210 may also be connected to the third channel 230 to facilitate the effective extraction of the excised and dissolved plaque.

[0032] One end of the sleeve 200 is embedded in the first opening 111 and can abut against the transition surface 150. On the one hand, it can realize reliable communication between the second channel 220 and the third opening 131, and between the third channel 230 and the fourth opening 141, reducing the risk of liquid leakage. On the other hand, the transition surface 150 also provides axial positioning for the assembly of the sleeve 200 and the multi-port connector 100.

[0033] In some embodiments, the sleeve 200 and the multi-port connector 100 can be glued together. For example, glue can be applied to the outer circumferential surface of the sleeve 200 before the sleeve 200 is inserted into the multi-port connector 100, thereby gluing the two together. In other feasible embodiments, the sleeve 200 and the multi-port connector 100 can also be connected by a snap-fit ​​or threaded structure.

[0034] As can be seen from the above description, the plaque resection catheter provided in this application embodiment, through the connection and cooperation of the multi-port connector 100 and the sleeve 200, can form a channel in the plaque resection catheter to realize functions such as the insertion and exit of the guide wire or the rotary cutting component 400, the inlet and outlet of the fluid. At the same time, the structure of the multi-port connector 100 and the sleeve 200 is relatively simple, the processing is relatively easy, and the assembly between the two is also relatively simple and convenient, which helps to reduce the manufacturing cost of the plaque resection catheter.

[0035] In some embodiments, the sleeve 200 has a developing section (not shown in the figure). For example, a developing ring may be connected to the sleeve 200, or a developing block may be attached to it. In some feasible solutions, the sleeve 200 may also be made of a material containing a developing substance, that is, the entire sleeve 200 can serve as the developing section. In some cases, the developing substance may be barium sulfate or bismuth oxide, etc., without specific limitations.

[0036] By setting a contrast-enhancing section on the cannula 200, it is convenient to detect the position of the cannula 200 during the operation, determine whether the plaque resection catheter has been inserted into the blood vessel, and thus help to carry out the operation smoothly.

[0037] Optionally, such as Figure 5 As shown, a first opening groove and / or a second opening groove are provided on the outer peripheral surface of the end of the sleeve 200 away from the multi-port connector 100. The first opening groove is used to connect the second channel 220 with the external space, and the second opening groove is used to connect the third channel 230 with the external space.

[0038] The cannula 200 has two axially opposite ends, referred to as the first end and the second end, respectively. The first end is embedded in the first opening 111 of the multi-port connector 100, and the second end corresponds to the end away from the multi-port connector 100. In practical applications, the second end of the cannula 200 generally reaches or is close to the vascular plaque. An opening groove 240 is provided on the outer peripheral surface of the second end to better guide liquids such as drugs to the plaque, so as to dissolve the plaque or effectively export the dissolved plaque.

[0039] In this embodiment, the first opening groove and / or the second opening groove correspond to the opening groove 240 opened on the outer peripheral surface of the second end of the sleeve 200.

[0040] In some embodiments, the cannula 200 may only have a first opening groove for communicating the second channel 220 with the external space. The second channel 220 communicates with the third opening 131 of the multi-port connector 100. Through the path from the third opening 131, the second channel 220 to the first opening groove, external fluid can be effectively introduced to the vascular plaque. Of course, the cannula 200 may also only have a second opening groove for effectively exporting dissolved plaque.

[0041] In other embodiments, the cannula 200 is provided with both a first opening groove and a second opening groove, which can improve the effectiveness of drug delivery and also effectively remove dissolved plaque.

[0042] like Figure 4 As shown, in some embodiments, the second channel 220 and the third channel 230 are arranged symmetrically on the cross-section of the sleeve 200.

[0043] In this embodiment, the shapes of the second channel 220 and the third channel 230 can be identical or substantially identical, and the two channels are centrally symmetrical. When assembling the sleeve 200 and the multi-port connector 100, the second channel 220 and the third channel 230 do not correspond absolutely to the channels in the sleeve 200, but are determined by the angle at which the sleeve 200 and the multi-port connector 100 are assembled. In other words, for a specific channel in the sleeve 200, if it connects to the third opening 131 after assembly, then that channel is the second channel 220; conversely, if it connects to the fourth opening 141 after assembly, then that channel is the third channel 230.

[0044] refer to Figure 4 The second channel 220 and the third channel 230 are arranged symmetrically about 180°. Inserting the sleeve 200 into the first opening 111 at 0° has the same effect as inserting the sleeve 200 into the first opening 111 at 180°. Based on this, when assembling the sleeve 200 and the multi-port connector 100, the need for adjusting the installation angle of the sleeve 200 can be effectively reduced, thereby reducing the assembly difficulty between the sleeve 200 and the multi-port connector 100.

[0045] Of course, in some implementations, the number of second channels 220 or the number of third channels 230 can be one, and the second channels 220 and the third channels 230 on the sleeve 200 can also be centrally symmetrical about other angles. Examples will not be given here.

[0046] In some preferred embodiments, the first channel 210 may be the central channel of the sleeve 200, and the second channel 220 and the third channel 230 may be arranged around the first channel 210.

[0047] In some possible scenarios, the second channel 220 and the third channel 230 can also be arranged in a non-centrally symmetrical manner, or there may be different requirements for the liquid flow rate of the two channels. In this case, the size or shape of the second channel 220 and the third channel 230 can also be different.

[0048] like Figure 3As shown, in some embodiments, the first channel 210 and the second opening 121 can be arranged coaxially to form a smoother channel, facilitating the passage of structures such as guide wires or rotary cutting components 400.

[0049] In some embodiments, the first channel 210 and the second opening 121 may have the same or approximately the same inner diameter. As shown above, the inner diameter of the first opening 111 is larger than the inner diameter of the second opening 121. By reasonably designing the size of the sleeve 200, the sleeve 200 can be inserted into the first opening 111. The inner diameters of the first channel 210 and the second opening 121 are basically equal, thereby obtaining a smoother internal channel, which facilitates the insertion and exit of the guide wire, the rotary cutting assembly 400 or other similar structures.

[0050] In some implementations, the inner diameters of the first channel 210 and the second opening 121 can be flexibly designed to ensure that structures such as the guide wire or the rotary cutting component 400 can pass through.

[0051] In some embodiments, the third connector 130 and the fourth connector 140 are both arranged at an angle relative to the first connector 110. In the axial extension direction of the first connector 110, the free ends of the third connector 130 and the fourth connector 140 face away from the first connector 110. This reduces the flow resistance of the liquid injected into the third opening 131, allowing the liquid to reach the location of the plaque better. At the same time, it also allows the dissolved plaque to flow out more smoothly along the fourth opening 141.

[0052] like Figure 1 As shown, in some embodiments, the plaque resection catheter further includes an inlet tube 311 and a first tube seat 312, one end of the inlet tube 311 being connected to a third connector 130, and the first tube seat 312 being connected to the end of the inlet tube 311 away from the third connector 130.

[0053] In conjunction with the embodiments described above, the third opening 131 in the third connector 130 can be used for liquid inlet. However, in practical applications, external liquid may need to travel through a relatively long channel to reach the blood vessel. In this embodiment, a separate liquid inlet pipe 311 is provided to meet the length requirements of the flow channel for external liquid.

[0054] The inlet pipe 311 has two ends in the axial direction, one end connected to the third connector 130 and the other end connected to the first pipe seat 312. In some examples, the inlet pipe 311 and the third connector 130 can be glued, snap-fitted, or threaded. In other examples, the inlet pipe 311 and the first pipe seat 312 can be integrally formed, glued, snap-fitted, or threaded. This embodiment does not specifically limit the connection method between the inlet pipe 311 and other structures, as long as it can effectively prevent liquid leakage in the flow channel.

[0055] The structure of the first tube seat 312 is not specifically limited here. In some examples, the first tube seat 312 can be used to match the port of the syringe, or in other examples, the first tube seat 312 can be used to match and connect the infusion tube, etc.

[0056] Optionally, such as Figure 1 As shown, the plaque resection catheter also includes an outlet tube 321 and a second tube seat 322. One end of the outlet tube 321 is connected to the fourth connector 140, and the second tube seat 322 is connected to the end of the outlet tube 321 that is away from the fourth connector 140.

[0057] The feasible implementation of the outlet pipe 321 and the second pipe seat 322 in this embodiment can be referred to the description of the inlet pipe 311 and the first pipe seat 312 in the previous embodiment. In practical applications, the outlet pipe 321 and the inlet pipe 311 can be the same or different, and the first pipe seat 312 and the second pipe seat 322 can be the same or different. The specific structure of these pipes and pipe seats can be designed or selected according to actual needs, and will not be described in detail here.

[0058] like Figure 6 As shown, this application embodiment also provides a plaque resection device, including the above-mentioned plaque resection catheter and rotary cutting assembly 400; wherein, the rotary cutting assembly 400 includes a drive shaft 410 and a rotating blade 420, the drive shaft 410 is disposed through the first channel 210 and the second opening 121, and the rotating blade 420 is connected to the drive shaft 410.

[0059] In this embodiment, the drive shaft 410 passes through the first channel 210 and the second opening 121, that is, through the plaque resection catheter. One end of the drive shaft 410 is connected to the rotating blade 420. During the operation, the rotating blade 420 can be delivered to the vascular plaque, and the vascular plaque is removed by rotating the blade 420. Correspondingly, the other end of the drive shaft 410 needs to be led out to facilitate connection to an external rotary drive mechanism.

[0060] In some examples, the rotary drive mechanism can be a motor, while in other possible implementations it can be a manually driven structure.

[0061] In this embodiment, the first channel 210 and the second opening 121 can provide better guidance and support for the drive shaft 410 in the radial direction, preventing the distal end of the drive shaft 410 and the rotating cutter head 420 from shifting, thus improving the stability of the plaque removal process. Simultaneously, the inner diameter of the first channel 210 and the second opening 121 can be slightly larger than the outer diameter of the drive shaft 410 to avoid obstructing the rotation of the drive shaft 410.

[0062] In some embodiments, a guidewire lumen (not shown in the figure) may be provided in the drive shaft 410. In actual plaque resection, a guidewire (not shown in the figure) is usually inserted into the location of the vascular plaque first. During the insertion of the drive shaft 410, the guidewire lumen will move along the guidewire until the drive shaft 410 is delivered to the target position.

[0063] like Figure 5 As shown, in some embodiments, the distal end of the drive shaft 410, i.e., the end used for insertion into the location of the vascular plaque, can be configured as a pointed cone to facilitate passage through the calcified site in the blood vessel. The rotating blade 420 can be located proximal to the pointed cone end, i.e., on the side close to the cannula 200.

[0064] In some embodiments, the surface of the tapered end face of the rotary cutting blade and / or drive shaft 410 can be plated with a radiopaque material, such as gold or tungsten, to facilitate observation of the location of these structures during the operation, thereby aiding in the precise execution of the surgery.

[0065] Of course, the developing element can also be set on the tapered end face of the rotary cutting blade and / or drive shaft 410 in other ways, such as being made directly from a material containing developing material, or fixing the developing ring or developing film in a specific position, etc.

[0066] like Figure 6 and Figure 7 As shown, in some embodiments, the rotary cutting assembly 400 further includes a drive motor 430 connected to the drive shaft 410, and the drive motor 430 and the rotary blade 420 are located on opposite sides of the plaque resection catheter, respectively.

[0067] In this embodiment, the rotation drive mechanism of the drive shaft 410 can be a drive motor 430. The drive motor 430 is located on the proximal side of the plaque resection catheter, that is, the end close to the surgeon. One end of the drive shaft 410 is connected to the drive motor 430, and the other end passes through the plaque resection catheter, which can reach the location of the vascular plaque. The rotating blade 420 is installed at the distal end of the drive shaft 410 and is located outside the first channel 210.

[0068] like Figure 7As shown, in some examples, the output shaft of the drive motor 430 is connected to the transmission shaft 410 via a coupling 460. The drive motor 430 drives the transmission shaft 410 to rotate, which in turn drives the rotary blade 420 to rotate, thereby removing vascular plaques during surgery. The drive motor 430 provides stable and reliable power to the rotary blade 420, improving the efficiency of vascular plaque removal.

[0069] Optionally, such as Figure 6 and Figure 7 As shown, the rotary cutting assembly 400 also includes a switch structure 440 and a power supply structure 450, with the drive motor 430, switch structure 440 and power supply structure 450 connected in sequence.

[0070] The motor is connected to the power supply structure 450 via the switch structure 440. In some examples, the power supply structure 450 may be a battery or a plug for connecting to mains power.

[0071] In some examples, the switch structure 440 can be divided into two states: on and off. In the on state, the power supply structure 450 is connected to the drive motor 430, and the drive motor 430 works; while in the off state, the drive motor 430 stops working.

[0072] In other examples, the switch structure 440 can be divided into multiple positions, such as a forward position, a reverse position, and a stop position. When the switch structure 440 is in the forward position, the drive motor 430 rotates forward and causes the rotating blade head 420 to open, so as to remove vascular plaque. When the switch structure 440 is in the reverse position, the drive motor 430 reverses and causes the rotating blade head 420 to close, so as to allow the rotating blade head 420 to pass through the blood vessel. When the switch structure 440 is in the stop position, the drive motor 430 and the rotating blade head 420 stop rotating.

[0073] In some other examples, the switch structure 440 can be divided into a stop position and multiple working positions. In different working positions, the drive motor 430 can have different speeds to adjust the rotation speed of the rotary cutter head 420 to meet different plaque removal requirements.

[0074] In some embodiments, the rotary cutting assembly 400 further includes a housing 470, in which the drive motor 430 is housed. The housing 470 can protect the drive motor 430, preventing contamination of the drive motor 430 during the procedure and extending the service life of the drive motor 430.

[0075] Optionally, such as Figure 6 As shown, the plaque removal device may include a liquid inlet drive 510, which is connected to a third connector 130.

[0076] In some examples, the inlet actuator 510 can be a syringe or a liquid pump, such as a micro-pump. The inlet actuator 510 can be directly or indirectly connected to the third connector 130 via a conduit, thereby delivering, for example, medication or contrast agent into the blood vessel.

[0077] Optionally, such as Figure 6 As shown, the plaque removal device may include a liquid discharge drive 520, which is connected to a fourth connector 140.

[0078] The fluid extraction drive 520 can also be a syringe or a liquid pump, depending on the requirements. The fluid extraction drive 520 can effectively extract fluids such as dissolved plaque, improving the outcome of plaque excision surgery.

[0079] In some feasible embodiments, the plaque removal device may include both an inlet drive 510 and an outlet drive 520. The structures of the two can be the same or different, and no specific limitation is made here.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An atherectomy catheter comprising: The application relates to a multi-way connector (100) and a sleeve (200) matched with the multi-way connector (100). The multi-way connector (100) comprises a first connecting head (110), a second connecting head (120), a third connecting head (130) and a fourth connecting head (140), the first connecting head (110) is provided with a first opening (111), the second connecting head (120) is provided with a second opening (121), the third connecting head (130) is provided with a third opening (131), the fourth connecting head (140) is provided with a fourth opening (141), the first opening (111) and the second opening (121) are communicated, the inner diameter of the first opening (111) is larger than that of the second opening (121), a transition surface (150) is formed between the first opening (111) and the second opening (121), and the third opening (131) and the fourth opening (141) independently penetrate the transition surface (150) to communicate with the first opening (111). The sleeve (200) is provided with a first channel (210), a second channel (220) and a third channel (230) arranged independently, one end of the sleeve (200) is embedded and installed in the first opening (111) and abuts against the transition surface (150), so that the first channel (210) is communicated with the second opening (121), the second channel (220) is communicated with the third opening (131), and the third channel (230) is communicated with the fourth opening (141).

2. The atherectomy device of claim 1, wherein the cutting head is configured to rotate about the longitudinal axis of the cutting head. A first opening groove and / or a second opening groove are arranged on the outer circumferential surface of the end of the sleeve (200) far away from the multi-way connector (100), the first opening groove is used for communicating the second channel (220) with an external space, and the second opening groove is used for communicating the third channel (230) with an external space.

3. The atherectomy device of claim 1, wherein the cutting head is configured to rotate about the longitudinal axis of the cutting head. The second channel (220) and the third channel (230) are arranged in a central symmetry on the cross section of the sleeve (200).

4. The atherectomy device of claim 1, wherein the cutting head is configured to rotate about the longitudinal axis of the cutting head. The second opening (121) and the first channel (210) are coaxially arranged.

5. The atherectomy device of claim 1, wherein the cutting head is configured to rotate about the longitudinal axis of the cutting head. The application further comprises a liquid inlet pipe (311) and a first pipe base (312), one end of the liquid inlet pipe (311) is connected to the third connecting head (130), and the first pipe base (312) is connected to the end of the liquid inlet pipe (311) far away from the third connecting head (130).

6. The atherectomy device of claim 1, wherein the cutting head is configured to rotate about the longitudinal axis of the cutting head. The application further comprises a liquid outlet pipe (321) and a second pipe base (322), one end of the liquid outlet pipe (321) is connected to the fourth connecting head (140), and the second pipe base (322) is connected to the end of the liquid outlet pipe (321) far away from the fourth connecting head (140).

7. An atherectomy device, comprising: The application relates to a plaque removal catheter. The plaque removal catheter comprises the multi-way connector (100) and the sleeve (200) matched with the multi-way connector (100), and a rotary cutting assembly (400) which comprises a transmission shaft (410) and a rotary cutter head (420), the transmission shaft (410) is arranged through the first channel (210) and the second opening (121), and the rotary cutter head (420) is connected to the transmission shaft (410). ​ 8. The atherectomy device of claim 7, wherein, The rotary cutting assembly (400) further comprises a driving motor (430) connected with the transmission shaft (410), and the driving motor (430) and the rotary cutter head (420) are located on opposite sides of the plaque removal catheter respectively.

9. The atherectomy device of claim 8, wherein, The rotary cutting assembly (400) further comprises a switch structure (440) and a power supply structure (450), and the driving motor (430), the switch structure (440) and the power supply structure (450) are sequentially connected. The switch structure (440) at least works in a forward rotation gear and a reverse rotation gear, in the forward rotation gear, the driving motor (430) rotates forward to drive the rotary cutter head (420) to open, and in the reverse rotation gear, the driving motor (430) rotates reversely to drive the rotary cutter head (420) to close.

10. The atherectomy device of claim 7, wherein, Further comprising at least one of the following: A liquid inlet driving member (510) connected to the third connecting head (130); A liquid outlet driving member (520) connected to the fourth connecting head (140).

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