Expandable thrombolysis stent and thrombolysis device

Abstract

The invention relates to the technical field of thrombolysis drug delivery instruments, and discloses an expandable thrombolysis stent and a thrombolysis device.The expandable thrombolysis stent is characterized in that a stent body which is formed by connecting a plurality of drug catheters in parallel and is in a quasi-cylindrical shape is arranged on the periphery of a central tube of a first slender tubular component; according to the expandable thrombolysis stent and the thrombolysis device, when thrombolysis medicine is poured, the expandable stent main body can be expanded in a thrombus, so that the thrombolysis medicine can be injected into the thrombus, and the thrombus can be injected into the thrombolysis medicine through the medicine catheter, and the thrombolysis medicine can be injected into the thrombus through the medicine injection through holes. Therefore, medicine perfusion can be carried out at the optimal position, full contact with thrombus is carried out, the thrombolysis efficiency is further improved, and efficient thrombolysis is achieved. According to the expandable thrombolysis stent and the thrombolysis device, when thrombolysis medicine is perfused, various thrombolysis point positions can be provided for thrombus due to the fact that the medicine injection through holes are formed in the medicine catheter, and therefore the thrombolysis targeting performance and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of thrombolytic drug delivery devices, and in particular to an expandable thrombolytic stent and a thrombolytic device. Background Art

[0002] Vascular diseases are important lethal diseases globally, and vascular embolism has become a major factor among vascular diseases. For vascular embolism, thrombolytic therapy can quickly dissolve thrombi, reopen blocked blood vessels, promptly restore blood perfusion of tissues and organs, and avoid irreversible damage caused by too long ischemia time. Moreover, due to its relatively convenient operation and high accessibility, it has become one of the main means of thromboembolism treatment. In the clinical practice of thrombolytic therapy, catheter-directed thrombolysis (CDT) can accurately deliver thrombolytic drugs to the thrombus site, improve the utilization efficiency of drugs, and better play the thrombolytic role.

[0003] Currently, the mainly used single-hole perfusion catheter or a multi-hole perfusion catheter similar to the "venous sinus thrombosis multi-side hole interventional catheter" described in the patent "CN117982198A". Since the drug delivery methods of the above two perfusion catheters are both to deliver drugs from the center of the thrombus, they have disadvantages such as single thrombolytic point and low thrombolytic efficiency for relatively large thrombi (such as pulmonary artery thrombi).

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the Invention

[0005] In view of the above deficiencies of the prior art, the purpose of the present invention is to provide an expandable thrombolytic stent and a thrombolytic device, aiming to solve the problems of single thrombolytic point and low thrombolytic efficiency of existing thrombolytic drug delivery devices for relatively large thrombi.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect, the present invention provides an expandable thrombolytic stent, which comprises: a first elongated tubular member including a central tube with a central cavity for facilitating the passage of a guide wire during surgery; a second elongated tubular member having one or more drug perfusion cavities formed in the wall thereof; a part of the central tube penetrating through the second elongated tubular member and being slidably connected to the second elongated tubular member, and another part of the central tube being exposed; and a stent body formed by connecting multiple drug conduits in parallel and having a quasi-cylindrical shape, with a plurality of drug injection through holes formed in the drug conduits; the stent body is sleeved around the other part of the central tube and the inner cavity of the drug conduit is communicated with the drug perfusion cavity, the proximal handle end of the stent body is fixedly connected to the distal handle end of the second elongated tubular member through a connecting rod, and the distal handle end of the stent body is in an expanded or contracted state. By arranging a stent body formed by connecting multiple drug conduits in parallel and having a quasi-cylindrical shape around the other part of the central tube of the first elongated tubular member, communicating the inner cavity of the drug conduit with the drug perfusion cavity of the first elongated tubular member, and forming a plurality of drug injection through holes in the drug conduits, the present invention enables: when the expandable thrombolytic stent of the present invention performs thrombolytic drug perfusion, due to the expandable stent body, it can be expanded inside a thrombus (such as a thrombus with a relatively large diameter), so that drug perfusion can be carried out at the optimal position, making full contact with the thrombus, thereby improving the thrombolytic efficiency and achieving efficient thrombolysis; when the expandable thrombolytic stent of the present invention performs thrombolytic drug perfusion, due to a plurality of drug injection through holes formed in the drug conduits, it can provide various thrombolytic points for the thrombus, thereby improving the targeting and efficiency of thrombolysis.

[0008] In a preferred embodiment, the first elongated tubular member further includes a tapered head with an open end; the distal handle end of the stent body is in a contracted state and is fixedly connected to the distal handle end of the central tube and the open end of the tapered head through a connecting rod. With such an arrangement, when the present invention controls the second elongated tubular member to slide along the central tube of the first elongated tubular member to change the displacement between the second elongated tubular member and the first elongated tubular member, the distance between the two ends of the stent body is changed, thereby controlling and adjusting the expansion and contraction of the stent body.

[0009] In a preferred embodiment, the expandable thrombolytic stent further includes one or more collars sleeved on the stent body for controlling the expansion and contraction of the stent body. With such an arrangement, the position of the collar on the stent body can be changed by sliding the collar, and the stent body can be partitioned into stent units, thereby further controlling and adjusting the expansion state of the stent body.

[0010] In a preferred embodiment, the collar is further configured to space the stent body into a plurality of stent units having the same or different expansion states, and each stent unit is independently cylindricoid-like, spheroid-like or disc-like. With such an arrangement, the position of the collar on the stent body can be changed by sliding the collar, so as to further control and adjust the expansion state of the stent body by changing the shape of the stent units.

[0011] In one or more embodiments, the drug catheter is a metal catheter, a plastic catheter or an alloy catheter.

[0012] In the existing catheter-directed thrombolysis operation, thrombolysis needs to be continuously performed for 2-3 days, and continuous monitoring and examinations are required to judge the thrombolysis progress and effect, so as to timely adjust the treatment plan. There are problems such as cumbersome operation and inability to guarantee timeliness. To solve this problem, in one or more embodiments, the expandable thrombolytic stent further includes an optical fiber pressure sensor and an optical fiber cloth; the optical fiber pressure sensor is disposed on the wall of the distal handle end of the second elongated tubular member or on the wall of another part of the central tube, and is configured to sense blood pressure and transmit it; the optical fiber cloth is disposed in the optical fiber connection cavity in the lumen of the second elongated tubular member and is connected to an external handle, and is configured to transmit blood pressure data. With such an arrangement, the expandable thrombolytic stent of the present invention realizes real-time monitoring of the pressure (i.e., blood pressure) in the blood vessel to be thrombolyzed; through real-time pressure monitoring, the thrombolysis progress is judged according to the pressure change, so as to realize real-time monitoring of the thrombolysis progress / effect.

[0013] In a preferred embodiment, the optical fiber pressure sensor is disposed on the wall of the proximal handle end of another part of the central tube.

[0014] In one or more embodiments, the expandable thrombolytic stent further includes an optical fiber sensor detection window, which is disposed on the wall of the second elongated tubular member and is configured to receive and display the blood pressure data sensed by the optical fiber pressure sensor.

[0015] In a second aspect, the present invention provides a thrombolysis device, which includes: the expandable thrombolytic stent according to any one of the first aspect and a handle, and the handle is connected to the proximal handle ends of the central tube and the second elongated tubular member.

[0016] In one or more embodiments, a drug injection joint, an evacuation catheter joint and a sensor joint are disposed on the handle. The drug injection joint is communicated with the drug perfusion cavity and is configured to connect an external drug delivery device for drug input; the evacuation catheter joint is communicated with the central cavity and is configured to evacuate air before thrombolysis; the sensor joint is configured to connect an external sensor connector for blood pressure data transmission.

[0017] Beneficial effects: The expandable thrombolytic stent and thrombolytic device of the present invention are provided with a stent body in a quasi-cylindrical shape formed by connecting multiple drug conduits in parallel around the central tube of the first elongated tubular member, and the inner cavity of the drug conduit is communicated with the drug perfusion cavity of the second elongated tubular member, and a plurality of drug injection through holes are provided on the drug conduit, so that: when the expandable thrombolytic stent and thrombolytic device of the present invention perform thrombolytic drug perfusion, due to the expandable stent body, it can expand inside a thrombus (such as a thrombus with a larger diameter), so that drug perfusion can be carried out at the optimal position, making full contact with the thrombus, thereby improving the thrombolytic efficiency and achieving efficient thrombolysis; when the expandable thrombolytic stent and thrombolytic device of the present invention perform thrombolytic drug perfusion, due to the plurality of drug injection through holes provided on the drug conduit, it can provide various thrombolytic points for the thrombus, thereby improving the targeting and efficiency of thrombolysis. Further, the expandable thrombolytic stent of the present invention further includes an optical fiber pressure sensor and an optical fiber cloth; the optical fiber pressure sensor is arranged on the wall of the far handle end of the second elongated tubular member or on the wall of another part of the central tube for sensing blood pressure and transmitting it; the optical fiber cloth is arranged in the optical fiber connection cavity in the cavity of the second elongated tubular member and is connected to an external handle for transmitting blood pressure data; thus arranged, the expandable thrombolytic stent and thrombolytic device of the present invention can realize real-time monitoring of the pressure (i.e., blood pressure) in the blood vessel to be thrombolyzed; through real-time pressure monitoring, the thrombolytic progress is judged according to the pressure change, so as to realize real-time monitoring of the thrombolytic progress / effect. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the expandable thrombolytic stent provided in Embodiment 1 of the present invention;

[0019] Figure 2 is Figure 1 a partial enlarged view of.

[0020] Figure 3 It is a schematic structural diagram of an expandable thrombolytic stent provided in Embodiment 2 of the present invention.

[0021] Figure 4 It is a schematic structural diagram of another expandable thrombolytic stent provided in Embodiment 2 of the present invention.

[0022] Figure 5 It is an exploded structural diagram of the thrombolytic device provided in Embodiment 3 of the present invention.

[0023] Description of the reference numerals: 1. First elongated tubular member; 2. Second elongated tubular member; 3. Bracket body; 4. Slip ring; 5. Detection window of the fiber optic sensor; 10. Expandable thrombolytic stent; 11. Central tube; 12. Tapered head; 20. Handle; 21. Drug injection connector; 22. Drainage catheter connector; 23. Sensor connector; 31. Drug catheter; 32. Drug injection through hole; 100. Thrombolytic device. Detailed implementation manners

[0024] The present invention provides an expandable thrombolytic stent and a thrombolytic device. To make the objectives, technical solutions and effects of the present invention clearer and more definite, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] Embodiment 1

[0026] Refer to Figure 1-2 , this embodiment provides an expandable thrombolytic stent 10, which includes: a first elongated tubular member 1, including a central tube 11 with a central cavity, and the central cavity is used for facilitating the passage of a guide wire during surgery; a second elongated tubular member 2, and one or more drug perfusion cavities are provided on the tube wall of the second elongated tubular member 2; a part of the central tube 11 penetrates through the second elongated tubular member 2 and is slidably connected to the second elongated tubular member 2, and the other part of the central tube 11 is exposed; and a stent body 3, which is formed by connecting multiple drug catheters 31 in parallel and is in a cylindrical shape, and a plurality of drug injection through holes 32 are provided on the drug catheter 31; the stent body 3 is sleeved around the other part of the central tube 11 and the inner cavity of the drug catheter 31 is communicated with the drug perfusion cavity, the near handle end of the stent body 3 is fixedly connected to the far handle end of the second elongated tubular member 2 through a connecting rod, and the far handle end of the stent body 3 is in an expanded or contracted state.

[0027] The expandable thrombolytic stent provided in this embodiment is provided with a stent body formed by connecting multiple drug catheters in parallel and in a cylindrical shape around the central tube of the first elongated tubular member, and the inner cavity of the drug catheter is communicated with the drug perfusion cavity of the second elongated tubular member, and a plurality of drug injection through holes are provided on the drug catheter, so that: when the expandable thrombolytic stent of the present invention performs thrombolytic drug perfusion, due to the expandable stent body, it can be expanded inside a thrombus (such as a thrombus with a larger diameter), so that drug perfusion can be performed at the optimal position, enabling the drug to fully contact the thrombus, thereby improving the thrombolytic efficiency and achieving efficient thrombolysis; when the expandable thrombolytic stent of the present invention performs thrombolytic drug perfusion, due to the provision of a plurality of drug injection through holes on the drug catheter, diverse thrombolytic points can be provided for the thrombus, thereby improving the targeting and efficiency of thrombolysis.

[0028] Embodiment 2

[0029] See Figure 3-4 Figure 3-4 , this embodiment provides an expandable thrombolytic stent 10, which includes: a first elongated tubular member 1, including a central tube 11 with a central cavity and a tapered head 12 with an open end, and the central cavity is used to facilitate the passage of a guide wire during surgery; a second elongated tubular member 2, with one or more drug perfusion cavities opened on the wall of the second elongated tubular member 2; a part of the central tube 11 penetrates through the second elongated tubular member 2 and is slidably connected to the second elongated tubular member 2, and the other part of the central tube 11 is exposed; and a stent body 3, which is formed by connecting multiple drug conduits 31 in parallel and is in a cylindrical shape, and a plurality of drug injection through holes 32 are opened on the drug conduit 31; the stent body 3 is sleeved around the other part of the central tube 11 and the inner cavity of the drug conduit 31 is communicated with the drug perfusion cavity, the proximal handle end of the stent body 3 is fixedly connected to the distal handle end of the second elongated tubular member 2 through a connecting rod, and the distal handle end of the stent body 3 is in a contracted state and is fixedly connected to the distal handle end of the central tube 11 and the open end of the tapered head 12 through a connecting rod.

[0030] In addition to the beneficial effects of the expandable thrombolytic stent provided in Embodiment 1, when the displacement between the second elongated tubular member and the first elongated tubular member is changed by controlling the second elongated tubular member along the central tube of the first elongated tubular member in this embodiment, the distance between the two ends of the stent body is changed, and then the expansion and contraction of the stent body are controlled and adjusted, that is, the expansion of the stent body is controllable.

[0031] It should be understood that the proximal handle end refers to the end close to the handle in the axial direction of the central tube and the second elongated tubular member when a handle is connected to the end of the central tube and the second elongated tubular member away from the stent body; similarly, the distal handle end refers to the end away from the handle in the axial direction of the central tube and the second elongated tubular member when a handle is connected to the end of the central tube and the second elongated tubular member away from the stent body.

[0032] In one or more preferred embodiments, the stent body 3 is formed by connecting 3 or more drug conduits 31 in parallel. In theory, the more the number of drug conduits constituting the stent body, the greater the coverage density of the thrombolytic points that the stent body can provide, and the better the thrombolytic effect; but currently, due to the influence of the diameter of the drug conduit, preferably, the thrombolytic effect is better when the stent body is composed of 3 - 6 drug conduits; more preferably, the thrombolytic effect is the best when the stent body is composed of 6 drug conduits; in the future, with the development of technology, the number of drug conduits constituting the stent body may be more.

[0033] In one or more preferred embodiments, the inner diameter of the second elongated tubular member 2 is greater than the outer diameter of the central tube 11; the inner diameter of the second elongated tubular member 2 is 1 to 10 mm; the outer diameter of the central tube 11 is 0.8 to 9.8 mm; the inner diameter of the drug catheter 31 is 0.1 to 1 mm.

[0034] In one or more preferred embodiments, the expandable thrombolytic stent 10 further includes one or more collars 4 sleeved on the stent body 3 for controlling the expansion and contraction of the stent body 3. With such an arrangement, the position of the collar on the stent body can be changed by sliding the collar, and the stent body can be spaced into stent units, thereby further controlling and adjusting the expansion state of the stent body. Exemplarily, Figure 3 In the shown expandable thrombolytic stent 10, there is one collar 4 which is currently located at the distal handle end of the stent body 3. When the collar 4 moves along the central tube towards the central position of the stent body 3, the expansion and contraction of the stent body 3 can be further controlled and adjusted.

[0035] Furthermore, the collar 4 is also used for spacing the stent body into multiple stent units with the same or different expansion states, and each stent unit is independently cylindroid-like, sphere-like or disc-like. With such an arrangement, the position of the collar on the stent body can be changed by sliding the collar, and thus the expansion state of the stent body can be further controlled and adjusted by changing the shape of the stent unit. Exemplarily, Figure 3 In the shown expandable thrombolytic stent 10, there is one collar 4 which is currently located at the distal handle end of the stent body 3. When the collar 4 moves along the central tube towards the central position of the stent body 3, the stent body 3 can be spaced into two stent units with the same or different expansion states, thereby further controlling and adjusting the expansion and contraction of the stent body 3. Another exemplarily, Figure 4 In the shown expandable thrombolytic stent 10, there are three collars 4, one of which is currently located at the distal handle end of the stent body 3, and the other two collars 4 are respectively located at the 1 / 3 and 2 / 3 positions of the length of the stent body 3. Thus, the stent body 3 can be spaced into three stent units with the same expansion state, and each of these stent units is sphere-like. Preferably, the number of the collars 4 is 1 to 5.

[0036] In one or more embodiments, the drug catheter 31 is a metal catheter, a plastic catheter, or an alloy catheter. Exemplarily, the metal catheter may be a tantalum catheter, a tungsten catheter, a titanium catheter, a cobalt catheter, a chromium catheter, etc.; the plastic catheter may be a silicone rubber catheter, a polyurethane (PU) catheter, a polytetrafluoroethylene (PIFE) catheter, a polyethylene (PE) catheter, a polypropylene (PP) catheter, a polyvinyl chloride (PVC) catheter, a polymethyl methacrylate (PMMA) catheter, a polyethylene terephthalate (PET) catheter, a nylon (PA) catheter, a polycarbonate (PC) catheter, etc.; the alloy catheter may be a nitinol alloy catheter, a cobalt-chromium alloy catheter, a titanium alloy catheter, a stainless steel catheter, etc. In a preferred embodiment, the drug catheter is a nitinol alloy catheter; this nitinol alloy catheter has better biocompatibility, corrosion resistance, strength, and flexibility, and when used as a drug catheter for thrombolytic administration, it may cause fewer side effects to the organism.

[0037] In one or more embodiments, the expandable thrombolytic stent 10 further includes an optical fiber pressure sensor and an optical fiber cloth; the optical fiber pressure sensor is disposed on the wall of the distal handle end of the second elongated tubular member, or on the wall of another part of the central tube (the other part is the area covered by the stent body), for sensing blood pressure and transmitting it; the optical fiber cloth is disposed in the optical fiber connection cavity in the lumen of the second elongated tubular member 2 and is connected to an external handle, for transmitting blood pressure data. When thrombolysis is successful, the blood pressure will change instantaneously when the blood flow becomes unobstructed. For example, the blood pressure at the proximal handle end of the stent body will fluctuate downward due to the sudden unobstructed blood flow, while the center and the distal handle end of the stent body will generate upward fluctuations. With such a setting, the expandable thrombolytic stent of the present invention can achieve real-time monitoring of the pressure (i.e., blood pressure) inside the blood vessel to be thrombolyzed; through real-time pressure monitoring, the thrombolysis progress can be judged according to the pressure change, so as to achieve real-time monitoring of the thrombolysis progress / effect (the expandable thrombolytic stent of the present invention can monitor the thrombolysis situation in real time); in addition, such a setting can solve the problems existing in the existing catheter-directed thrombolysis operation, such as cumbersome operation and inability to ensure timeliness.

[0038] In a preferred embodiment, the optical fiber pressure sensor is disposed on the wall of the proximal handle end of another part of the central tube. As described above, when thrombolysis is successful, the blood pressure will change instantaneously when the blood flow becomes unobstructed, and the blood pressure in the area covered by the proximal handle end of the stent body changes first. Therefore, setting the optical fiber pressure sensor at this defined position will sense the blood pressure change in the first time.

[0039] See Figure 1 , in one or more embodiments, the expandable thrombolytic stent 10 further includes an optical fiber sensor detection window 5, which is disposed on the wall of the second elongated tubular member 2 for receiving and displaying the blood pressure data sensed by the optical fiber pressure sensor.

[0040] Example 3

[0041] An embodiment of the present invention provides a thrombolytic device 100, which includes: an expandable thrombolytic stent 10 as described in any one of the above-mentioned Embodiments 1-2 ( Figure 5 the expandable thrombolytic stent in the shown thrombolytic device is an expandable thrombolytic stent provided in Embodiment 2) and a handle 20, and the handle 20 is connected to the proximal handle ends of the central tube 11 and the second elongated tubular member 2.

[0042] In one or more embodiments, a drug injection joint 21, an evacuation catheter joint 22, and a sensor joint 23 are provided on the handle 20; the drug injection joint 21 communicates with the drug perfusion cavity and is used to connect an external drug delivery device for drug input; the evacuation catheter joint 22 communicates with the central cavity and is used to evacuate air before thrombolysis; the sensor joint 23 is used to connect an external sensor connector for blood pressure data transmission. Exemplarily, the evacuation catheter joint 22 can be used to inject physiological saline before the expandable thrombolytic stent of the present invention enters the blood vessel to evacuate the air inside the device.

[0043] In summary, the expandable thrombolytic stent and thrombolytic device provided by the present invention are provided with a stent body in a shape of a quasi-cylindrical formed by parallel connection of multiple drug conduits around the central tube of the first elongated tubular member, and the inner cavity of the drug conduit communicates with the drug perfusion cavity of the first elongated tubular member, and a plurality of drug injection through holes are provided on the drug conduit, so that: when the expandable thrombolytic stent and thrombolytic device of the present invention perform thrombolytic drug perfusion, due to the expandable stent body, it can expand inside the thrombus (such as a thrombus with a larger diameter), so that drug perfusion can be performed at the optimal position, making full contact with the thrombus, thereby improving the thrombolytic efficiency and achieving efficient thrombolysis; when the expandable thrombolytic stent and thrombolytic device of the present invention perform thrombolytic drug perfusion, due to the plurality of drug injection through holes provided on the drug conduit, diverse thrombolytic positions can be provided for the thrombus, thereby improving the targeting and efficiency of thrombolysis. Further, the expandable thrombolytic stent of the present invention further includes an optical fiber pressure sensor and an optical fiber cloth; the optical fiber pressure sensor is arranged on the wall of the distal handle end of the second elongated tubular member or on the wall of another part of the central tube for sensing blood pressure and transmitting it; the optical fiber cloth is arranged in the optical fiber connection cavity in the cavity of the second elongated tubular member and is connected to the external handle for transmitting blood pressure data; thus arranged, the expandable thrombolytic stent and thrombolytic device of the present invention can realize real-time monitoring of the pressure (i.e., blood pressure) inside the blood vessel to be thrombolyzed; through real-time pressure monitoring, the thrombolysis progress is judged according to the pressure change, so as to realize real-time monitoring of the thrombolysis progress / effect.

[0044] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or modifications can be made according to the above description, and all such improvements and modifications should fall within the protection scope of the appended claims of the present invention.

Claims

1. An expandable thrombolytic stent, characterized in that, Comprising: A first elongated tubular member including a central tube with a central cavity for facilitating the passage of a guide wire during surgery; A second elongated tubular member having one or more drug perfusion cavities formed in the wall thereof; A portion of the central tube penetrates through the second elongated tubular member and is slidably connected thereto, and another portion of the central tube is exposed; and A stent body formed by connecting a plurality of drug conduits in parallel and having a cylindrical shape, with a plurality of drug injection through-holes formed in the drug conduits; the stent body is sleeved around the other portion of the central tube and the inner cavity of the drug conduit is communicated with the drug perfusion cavity, the proximal handle end of the stent body is fixedly connected to the distal handle end of the second elongated tubular member through a connecting rod, and the distal handle end of the stent body is in an expanded or contracted state.

2. The expandable thrombolytic stent according to claim 1, wherein The first elongated tubular member further includes a tapered head with an open end; The distal handle end of the stent body is in a contracted state and is fixedly connected to the distal handle end of the central tube and the open end of the tapered head through a connecting rod.

3. The expandable thrombolytic stent according to claim 2, wherein The expandable thrombolytic stent further includes one or more collars sleeved on the stent body for controlling the expansion and contraction of the stent body.

4. The expandable thrombolytic stent according to claim 3, wherein The collar is further used for separating the stent body into a plurality of stent units having the same or different expansion states, and each stent unit is independently cylindrical, spherical or disc-shaped.

5. The expandable thrombolytic stent according to claim 1, characterized in that, The drug conduit is a metal conduit, a plastic conduit or an alloy conduit.

6. The expandable thrombolytic stent according to any one of claims 1-5, characterized in that, The expandable thrombolytic stent further includes an optical fiber pressure sensor and an optical fiber cloth; the optical fiber pressure sensor is disposed on the wall of the distal handle end of the second elongated tubular member or on the wall of the other portion of the central tube for sensing blood pressure and transmitting it; the optical fiber cloth is disposed in the optical fiber connection cavity in the cavity of the second elongated tubular member and is connected to an external handle for transmitting blood pressure data.

7. The expandable thrombolytic stent according to claim 6, wherein The optical fiber pressure sensor is disposed on the wall of the proximal handle end of the other portion of the central tube.

8. The expandable thrombolytic stent according to claim 6, wherein, The expandable thrombolytic stent further includes an optical fiber sensor detection window disposed on the wall of the second elongated tubular member for receiving and displaying the blood pressure data sensed by the optical fiber pressure sensor.

9. A thrombolytic device, characterized in that, Comprising: The expandable thrombolytic stent according to any one of claims 1-8 and a handle, the handle being connected to the proximal handle ends of the central tube and the second elongated tubular member.

10. The thrombolytic device according to claim 9, wherein, The handle is provided with a drug injection joint, an evacuation catheter joint and a sensor joint. The drug injection joint is communicated with the drug perfusion cavity for connecting an external drug delivery device for drug input; the evacuation catheter joint is communicated with the central cavity for evacuating air before thrombolysis; and the sensor joint is used for connecting an external sensor connector for blood pressure data transmission.

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