Guide wire assembly for abdominal aortic aneurysm interventional therapy

Abstract

The invention relates to the technical field of medical instruments, in particular to a guide wire assembly for abdominal aortic aneurysm interventional therapy, which comprises a guide wire, the guide wire is used for being inserted into an abdominal aorta to serve as a delivery track of a covered stent, two groups of iliac arteries are arranged at the bottom end of the abdominal aorta, a tumor body is arranged on the outer side of the abdominal aorta, and a delivery head is arranged at the outer end of the guide wire. The outer side of the guide wire is sleeved with a first handle, a first rod body and a guide head, the two ends of the first rod body are fixedly connected with the first handle and the guide head respectively, a memory alloy frame is arranged on the covered stent, the guide wire assembly comprises a stent mounting mechanism and a function conversion mechanism, and the stent mounting mechanism comprises a stent release module and a positioning expansion module. The covered stent can be stably conveyed to the corresponding position in the guide wire by pushing the first handle, the covered stent can conveniently release a tumor body in the guide wire, the feeding stability can be conveniently improved, the covered stent can be released by pulling the third handle, and rapid forming of the covered stent is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a guidewire assembly for interventional treatment of abdominal aortic aneurysm. Background Art

[0002] Abdominal aortic aneurysm is a common vascular disease in clinical practice. If not treated in time, it will lead to life-threatening due to the instantaneous rupture of the aortic aneurysm. With the continuous development of modern medical technology, interventional therapy, as an emerging treatment method, is constantly being used in various difficult and complicated diseases. The interventional treatment of abdominal aortic aneurysm is to place a self-expanding covered stent. It is a new technology used in clinical practice in recent years. Its principle is to put a covered stent with a diameter and length appropriate to the abdominal aorta into the delivery device in advance, and introduce it to the abdominal aortic aneurysm through the femoral artery. After the covered stent is released, the covered stent is tightly and firmly attached to the inner wall of the normal abdominal aorta at both ends of the aneurysm, and a new blood vessel is established in the vascular cavity, thereby separating the aneurysm from the blood circulation and achieving the purpose of intracavitary isolation. The covered stent usually has a tubular film and a memory alloy frame. This memory alloy frame is usually distributed in a circular and discontinuous manner on the surface of the tubular film. The covered stent currently used in the treatment of abdominal aortic aneurysm is usually made of nickel-titanium alloy material in a Y-shape. When placed, it is necessary to make incisions on the left and right femoral arteries at the same time, and introduce the covered stent in steps.

[0003] Blood leakage is prone to occur during the current treatment of abdominal aortic aneurysms. Internal leakage may cause the tumor tissue or stent material to fall off and move to the distal artery with the blood flow, causing distal artery embolism. Embolism can cause ischemia of the distal limbs, and in severe cases may cause necrosis, which needs to be solved in time. Blood leakage is mostly solved by introducing a spherical balloon for expansion, but the existing balloon device needs to be introduced separately through a guide wire. The insertion and removal process not only increases the damage to the abdominal aorta, but also increases the number of surgical steps, increases the operation time, and increases the risk of surgery. In addition, when the covered stent is just implanted, the blood between the covered stent and the inner wall of the abdominal aorta has not yet formed a relatively stable thrombus. The covered stent is prone to positional movement under the impact of internal blood flow, which will also affect the implantation effect.

[0004] To this end, a guidewire assembly for interventional treatment of abdominal aortic aneurysm is proposed. Summary of the invention

[0005] The object of the present invention is to provide a guidewire assembly for interventional treatment of abdominal aortic aneurysm, so as to solve the problems of inconvenient treatment of blood leakage and easy displacement of the coated stent proposed in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a guidewire assembly for interventional treatment of abdominal aortic aneurysm, comprising a guidewire, the guidewire is used to be inserted into the abdominal aorta as a delivery track of a covered stent, two groups of iliac arteries are arranged at the bottom end of the abdominal aorta, a tumor is arranged on the outside of the abdominal aorta, a delivery head is arranged at the outer end of the guidewire, a first handle, a first rod body and a guide head are sleeved on the outer side of the guidewire, the first handle and the guide head are fixedly connected at both ends of the first rod body, a memory alloy frame is arranged on the covered stent, the guidewire assembly comprises a stent installation mechanism and a function conversion mechanism, the stent installation mechanism comprises a stent release module and a positioning expansion module, the stent release module can release the covered stent into the abdominal aorta so that the covered stent covers the position of the tumor, the positioning expansion module can not only stably restrict the outer tube to the outside of the covered stent so that the outer tube will not separate from the outside of the covered stent during the delivery process, but also can expand the released covered stent so that the outside of the covered stent is more closely in contact with the inner wall of the abdominal aorta;

[0007] The function conversion mechanism also includes a limit adjustment module and a drug delivery module. The limit adjustment module can allow the card block to be stuck on the memory alloy frame, so that the memory alloy frame can drive the coated stent to move slightly. The drug delivery module can inject various drugs required for the operation into the corresponding positions in the abdominal aorta in time.

[0008] Preferably, the stent release module includes a second handle sleeved on the outside of the first rod body, the side of the second handle is fixedly connected to the second rod body, the outside of the second rod body is sleeved with a third handle and an outer tube, the side of the third handle is fixedly connected to the outer tube, an annular chamber is opened on the outside of the second rod body, and a coated stent is placed between the annular chamber and the outer tube.

[0009] Preferably, the positioning expansion module comprises an expansion airbag sleeved on the end of the second rod body, the outer side of the expansion airbag is clamped in the annular clamping groove, and the annular clamping groove is provided on the inner wall of the outer tube.

[0010] Preferably, one end of the expansion airbag is connected to one end of the air supply channel, the other end of the air supply channel is connected to an air pump, the air pump is connected to a pressure relief valve through an air supply pipe, and the air supply channel is opened in the second handle and the second rod body.

[0011] Preferably, the limit adjustment module includes an annular handle rotatably connected to the outside of the first handle, the inside of the annular handle is provided with a first infusion channel and a second infusion channel, the outside of the first handle is provided with a drug inlet tube, the drug inlet tube can be threadedly connected with various drug delivery tubes, the right end of the first infusion channel can be connected to one end of the discharge channel, the other end of the discharge channel is connected to an annular channel, the annular channel is connected to several groups of piston chambers, a piston is provided inside the piston chamber, and a block is fixedly connected to the outside of the piston.

[0012] Preferably, the first infusion channel runs through both ends of the guide wire, the middle of the first infusion channel is connected to one end of the second infusion channel, and the other end of the second infusion channel extends to the left side of the first handle. Rotating the annular handle can switch the left ends of the first infusion channel and the second infusion channel to connect to the medicine tube.

[0013] Preferably, a return spring is sleeved on the outer side of the clamping block, and the return spring is arranged in the piston cavity.

[0014] Preferably, the entirety of the clamping block is in a rod shape, and the outer end of the clamping block is in a hemispherical shape.

[0015] Preferably, the drug delivery module includes a liquid delivery channel opened in the first handle, the first rod body and the guide head, one end of the liquid delivery channel can be connected to the first infusion channel, and the other end of the liquid delivery channel extends to the outside of the guide head.

[0016] Beneficial effects of the present invention:

[0017] 1. The present invention designs a stent release module, and pushing the first handle can stably transport the coated stent to the corresponding position in the guide wire, which is convenient for the coated stent to release the tumor inside the guide wire and improves the stability of delivery. The coated stent can be released by pulling the third handle, which is convenient for rapid molding of the coated stent, simplifies the operating steps, saves operation time, and reduces surgical risks.

[0018] 2. The present invention designs a positioning expansion module to cooperate with the stent release module, and uses the expansion balloon to control the sliding effect of the outer tube. It can not only stably transport the coated stent to the inside of the guide wire by limiting the movement of the outer tube to avoid accidents of accidental opening of the coated stent during transportation, but also quickly release the restriction on the movement of the outer tube without interfering with the normal release of the coated stent. When internal leakage occurs, external gas can be sent into the expansion balloon to expand it, thereby expanding different positions of the coated stent, making the coated stent more closely attached to the inner wall of the guide wire, and quickly solving the problem of internal leakage.

[0019] 3. The present invention designs a limit adjustment module, rotates the annular handle to connect the drug inlet tube to the drainage channel, and delivers medicine through the drug inlet tube to externally control the extension and retraction of the card block, so that the card block can make slight adjustments to the position of the coated stent with the help of the memory alloy frame, which is convenient for solving the displacement problem of the coated stent during surgery, improves the accuracy of the coated stent installation, and reduces the risk of surgery.

[0020] 4. The present invention designs a drug delivery module to cooperate with a limit adjustment module, and utilizes an alignment block to assist the rotation of the annular handle, so as to facilitate the connection of the drug inlet tube to the liquid delivery channel, and facilitate the rapid delivery of different auxiliary drugs at different positions of the guide wire during the operation, thereby avoiding the insertion and removal of the delivery tube, greatly saving the operation time, and utilizing the second rod body to provide protection for the rotation of the first rod body, which can not only adjust the drug delivery angle and improve the accuracy of drug injection, but also reduce the vibration of the first rod body during rotation, thereby reducing the damage caused by the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is an overall stereoscopic schematic diagram of a guidewire assembly for interventional treatment of abdominal aortic aneurysm according to an embodiment of the present invention;

[0023] Figure 2 It is a cross-sectional schematic diagram of a stent graft delivery of a guidewire assembly for interventional treatment of abdominal aortic aneurysm according to an embodiment of the present invention;

[0024] Figure 3 It is a cross-sectional schematic diagram of a covered stent of a guidewire assembly for interventional treatment of abdominal aortic aneurysm after installation according to an embodiment of the present invention;

[0025] Figure 4 This is an overall exploded schematic diagram of a guidewire assembly for interventional treatment of abdominal aortic aneurysm according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic overall cross-sectional view of a guidewire assembly for interventional treatment of abdominal aortic aneurysm according to an embodiment of the present invention;

[0027] Figure 6 A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to an embodiment of the present invention Figure 5 The enlarged schematic diagram at A in the middle;

[0028] Figure 7 A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to an embodiment of the present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0029] Figure 8 A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to an embodiment of the present invention Figure 5 Enlarged schematic diagram at point C in the middle.

[0030] The markings in the figure are: 1. guide wire; 2. abdominal aorta; 3. iliac artery; 4. tumor; 5. delivery head; 6. first handle; 7. first rod; 8. guide head; 9. second handle; 10. second rod; 11. third handle; 12. outer tube; 13. annular chamber; 14. coated stent; 15. memory alloy frame; 16. expansion balloon; 17. annular groove; 18. gas delivery channel; 19. air pump; 20. pressure relief valve; 21. annular handle; 22. first infusion channel; 23. second infusion channel; 24. drug inlet tube; 25. liquid delivery channel; 26. liquid discharge channel; 27. annular channel; 28. piston chamber; 29. ​​piston; 30. block; 31. reset spring; 32. alignment block. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] See also Figures 1 to 8The present invention provides a technical solution: a guidewire assembly for interventional treatment of abdominal aortic aneurysm, comprising a guidewire 1, the guidewire 1 is used to be inserted into the abdominal aorta 2 as a delivery track for a stent graft 14, the bottom end of the abdominal aorta 2 is provided with two groups of iliac arteries 3, the outer side of the abdominal aorta 2 is provided with a tumor body 4, the outer end of the guidewire 1 is provided with a delivery head 5, the outer side of the guidewire 1 is provided with a first handle 6, a first rod body 7 and a guide head 8, the two ends of the first rod body 7 are respectively fixedly connected with the first handle 6 and the guide head 8, the stent graft 14 is provided with a memory alloy frame 15, the guidewire The component includes a stent installation mechanism and a function conversion mechanism. The stent installation mechanism includes a stent release module and a positioning expansion module. The stent release module can release the coated stent 14 into the abdominal aorta 2 so that the coated stent 14 covers the position of the tumor 4. The positioning expansion module can not only stably restrict the outer tube 12 to the outside of the coated stent 14 so that the outer tube 12 will not separate from the outside of the coated stent 14 during transportation, but also expand the released coated stent 14 so that the outer side of the coated stent 14 is more closely in contact with the inner wall of the abdominal aorta 2.

[0034] The function conversion mechanism also includes a limit adjustment module and a drug delivery module. The limit adjustment module can allow the block 30 to be clamped on the memory alloy frame 15, so that the memory alloy frame 15 can drive the coated stent 14 to move slightly. The drug delivery module can inject various drugs required for the operation into the corresponding positions in the abdominal aorta 2 in time.

[0035] As an embodiment of the present invention, Figure 2 and Figure 3 as well as Figure 4As shown, the stent release module includes a second handle 9 sleeved on the outside of the first rod body 7, the side of the second handle 9 is fixedly connected to the second rod body 10, the outside of the second rod body 10 is sleeved with a third handle 11 and an outer tube 12, the side of the third handle 11 is fixedly connected to the outer tube 12, the outside of the second rod body 10 is provided with an annular chamber 13, and a coated stent 14 is placed between the annular chamber 13 and the outer tube 12. When in use, the guide wire 1 is first sent into the abdominal aorta 2 through the delivery head 5, and then the guide head 8 is sent into the guide wire 1 through the first handle 6, so that the coated stent 14 sleeved between the second rod body 10 and the outer tube 12 outside the first rod body 7 enters the guide wire 1, and then the third handle 11 is pulled to drive the outer tube 12 to slide on the second rod body 10, so that the coated stent 14 located at the second rod body 10 is The coated stent 14 between the rod body 10 and the outer tube 12 is released to the position of the tumor 4 inside the guide wire 1, and finally the first handle 6 is pulled, and the first handle 6 brings out the second rod body 10 through the guide head 8, and then the guide wire 1 is pulled out to complete the release of the coated stent 14 on one side, and similarly complete the release of the coated stent 14 on the other side, so that the coated stent 14 is combined into a Y shape to stably exert the blood flow delivery function, which is conducive to pushing the first handle 6 to stably transport the coated stent 14 to the corresponding position in the guide wire 1, and facilitate the coated stent 14 to release the tumor 4 inside the guide wire 1, so as to improve the stability of the delivery, and the third handle 11 can be pulled to release the coated stent 14, so as to facilitate the rapid molding of the coated stent 14, simplify the operation steps, save operation time, and reduce the operation risk.

[0036] As an embodiment of the present invention, Figure 4 and Figure 6 as well as Figure 7As shown, the positioning expansion module includes an expansion airbag 16 sleeved on the end of the second rod body 10, the outer side of the expansion airbag 16 is clamped in the annular clamping groove 17, the annular clamping groove 17 is opened on the inner wall of the outer tube 12, one end of the expansion airbag 16 is connected to one end of the gas delivery channel 18, the other end of the gas delivery channel 18 is connected to the air pump 19, the air pump 19 is connected to the pressure relief valve 20 through the gas delivery pipe, the gas delivery channel 18 is opened in the second handle 9 and the second rod body 10, and the guide head 8 drives the second rod During the process of the second rod body 10 and the outer tube 12 entering the guide wire 1, the outer side of the expansion balloon 16 on the second rod body 10 is clamped in the annular clamping groove 17 on the inner side of the outer tube 12, so that the outer tube 12 cannot move along the second rod body 10, thereby improving the stability of the delivery of the coated stent 14, and then the pressure relief valve 20 is started, and the pressure relief valve 20 discharges the gas in the expansion balloon 16 through the gas delivery channel 18, so that the outer side of the expansion balloon 16 is separated from the annular clamping groove 17 on the inner side of the outer tube 12, thereby releasing the restriction on the outer tube 12. , which facilitates the release of the coated stent 14, and finally pulls the second handle 9 to move the expansion balloon 16 to a position inside the coated stent 14 that is prone to internal leakage, and then starts the air pump 19, which delivers external gas into the expansion balloon 16 through the air supply channel 18, causing the outer side of the expansion balloon 16 to expand and expand the coated stent 14, thereby making the coated stent 14 more closely attached to the inside of the guide wire 1, which is beneficial for using the expansion balloon 16 to control the sliding effect of the outer tube 12. Not only can it limit the movement of the outer tube 12 and stably transport the coated stent 14 to the inside of the guide wire 1 to avoid the accident of accidentally opening the coated stent 14 during transportation, but it can also quickly release the restriction on the movement of the outer tube 12 without interfering with the normal release of the coated stent 14, and when internal leakage occurs, external gas can be sent into the expansion balloon 16 for expansion, expanding different positions of the coated stent 14, making the coated stent 14 more closely attached to the inner wall of the guide wire 1, and quickly solving the problem of internal leakage.

[0037] As an embodiment of the present invention, Figure 4 and Figure 6 as well as Figure 8As shown, because the blood between the coated stent 14 and the inner wall of the guide wire 1 has not formed a relatively stable thrombus when the coated stent 14 is just implanted, the coated stent 14 is prone to position movement under the impact of the internal blood flow, thereby affecting the implantation effect. The limit adjustment module includes an annular handle 21 rotatably connected to the outside of the first handle 6, and the inside of the annular handle 21 is provided with a first infusion channel 22 and a second infusion channel 23. The outside of the first handle 6 is provided with a drug feed tube 24, which can be threadedly connected to various drug delivery tubes. The right end of the first infusion channel 22 can be connected to one end of the drainage channel 26, and the other end of the drainage channel 26 is connected to the annular channel 27. The channel 27 is connected with a plurality of groups of piston chambers 28, a piston 29 is arranged inside the piston chamber 28, a block 30 is fixedly connected to the outside of the piston 29, the first infusion channel 22 passes through both ends of the guide wire 1, the middle of the first infusion channel 22 is connected to one end of the second infusion channel 23, the other end of the second infusion channel 23 extends to the left side of the first handle 6, and the left end of the first infusion channel 22 and the second infusion channel 23 can be switched to connect to the medicine inlet tube 24 by rotating the annular handle 21. A return spring 31 is sleeved on the outside of the block 30, and the return spring 31 is arranged in the piston chamber 28. The block 30 is arranged in a rod shape as a whole, and the outer end of the block 30 is arranged in a hemispherical shape. The drug delivery module package The liquid delivery channel 25 is provided in the first handle 6, the first rod body 7 and the guide head 8. One end of the liquid delivery channel 25 can be connected to the first infusion channel 22, and the other end of the liquid delivery channel 25 extends to the outside of the guide head 8. When in use, the annular handle 21 is rotated to make the drug inlet tube 24 communicate with the discharge channel 26 through the first infusion channel 22 and the second infusion channel 23, and then the medicine such as physiological saline is injected from the drug inlet tube 24, and then the medicine enters into the plurality of piston chambers 28 through the discharge channel 26 and the annular channel 27, and then the medicine in the piston chamber 28 drives the block 30 to separate from the piston chamber 28 and move to the outside of the guide head 8 through the piston 29, and after the liquid is discharged, the return spring 31 is reset. The restoring force can automatically collect the block 30 through the piston 29, and finally the block 30 extending to the outside of the guide head 8 is stuck on the memory alloy frame 15 set inside the coated stent 14, and then the third handle 11 drives the coated stent 14 to fine-tune the position through the block 30 and the memory alloy frame 15, which is conducive to rotating the annular handle 21 to connect the drug inlet pipe 24 to the drainage channel 26, and the drug is delivered through the drug inlet pipe 24 to control the extension and contraction of the block 30 externally, so that the block 30 can make slight adjustments to the position of the coated stent 14 with the help of the memory alloy frame 15, which is convenient for solving the displacement problem of the coated stent 14 during the operation, improving the accuracy of the installation of the coated stent 14, and reducing the risk of the operation.

[0038] As an embodiment of the present invention, Figure 5 and Figure 6 as well as Figure 8As shown, the drug delivery module includes a liquid delivery channel 25 opened in the first handle 6, the first rod body 7 and the guide head 8, one end of the liquid delivery channel 25 can be connected to the first infusion channel 22, and the other end of the liquid delivery channel 25 extends to the outside of the guide head 8. An alignment block 32 is arranged on the outside of the first handle 6. When the implantation process requires the delivery of drugs into the guide wire 1, the alignment block 32 is used to accurately rotate the annular handle 21 by 180 degrees, so that the drug inlet tube 24 is connected to the liquid delivery channel 25 through the first infusion channel 22, and then the drug is delivered from the drug inlet tube 24, so that the drug flows to the corresponding position in the guide wire 1 through the liquid delivery channel 25, and finally rotated. The first handle 6 enables the first rod body 7 to rotate inside the second rod body 10, and the guide head 8 follows the first rod body 7 to adjust the liquid outlet angle of the liquid delivery channel 25, which is beneficial to using the alignment block 32 to assist the rotation of the annular handle 21, and facilitates the connection of the drug inlet tube 24 to the liquid delivery channel 25, and is convenient for quickly delivering different auxiliary drugs at different positions of the guide wire 1 during the operation, avoiding the insertion and removal of the delivery tube, greatly saving the operation time, and using the second rod body 10 to provide protection for the rotation of the first rod body 7, which can not only adjust the drug outlet angle and improve the accuracy of injection, but also reduce the vibration of the first rod body 7 during rotation, thereby reducing the damage of the operation.

[0039] Working principle: When in use, firstly, the guide wire 1 is delivered into the abdominal aorta 2 through the delivery head 5, and then the guide head 8 is delivered into the guide wire 1 through the first handle 6, so that the coated stent 14 between the second rod body 10 and the outer tube 12 outside the first rod body 7 enters the guide wire 1, and then the third handle 11 is pulled to drive the outer tube 12 to slide on the second rod body 10, and the coated stent 14 between the second rod body 10 and the outer tube 12 is released to the tumor 4 in the guide wire 1, and finally the first handle 6 is pulled, and the first handle 6 brings out the second rod body 10 through the guide head 8, and then the guide wire 1 is pulled out to complete the release of the coated stent 14 on one side, and similarly complete the release of the coated stent 14 on the other side, so that the coated stent 14 is combined into a Y shape to stably play the role of blood flow delivery;

[0040] When the guide head 8 drives the second rod body 10 and the outer tube 12 to enter the guide wire 1, the outer side of the expansion balloon 16 on the second rod body 10 is clamped in the annular clamping groove 17 on the inner side of the outer tube 12, so that the outer tube 12 cannot move along the second rod body 10, thereby improving the stability of the delivery of the coated stent 14. Then, the pressure relief valve 20 is started, and the pressure relief valve 20 discharges the gas in the expansion balloon 16 through the gas supply channel 18, so that the outer side of the expansion balloon 16 is separated from the annular clamping groove 17 on the inner side of the outer tube 12, thereby releasing the restriction on the outer tube 12 and facilitating the release of the coated stent 14. Finally, the second handle 9 is pulled to move the expansion balloon 16 to a position where the inside of the coated stent 14 is prone to internal leakage. Then, the air pump 19 is started, and the air pump 19 delivers external gas to the expansion balloon 16 through the gas supply channel 18, so that the outer side of the expansion balloon 16 expands to expand the coated stent 14, thereby making the coated stent 14 more closely attached to the inside of the guide wire 1.

[0041] The annular handle 21 is turned to connect the drug inlet tube 24 to the drainage channel 26 through the first infusion channel 22 and the second infusion channel 23, and then the medicine such as physiological saline is injected from the drug inlet tube 24, and then the medicine enters the plurality of piston chambers 28 through the drainage channel 26 and the annular channel 27, and then the medicine in the piston chamber 28 drives the block 30 to separate from the piston chamber 28 and move to the outside of the guide head 8 through the piston 29, and after the liquid is discharged, the restoring force of the return spring 31 can automatically collect the block 30 through the piston 29, and finally the block 30 extending to the outside of the guide head 8 is stuck to the memory alloy frame 15 provided inside the stent graft 14, and then the third handle 11 drives the stent graft 14 to fine-tune its position through the block 30 and the memory alloy frame 15;

[0042] When the implantation process requires delivering medicine into the guide wire 1, the annular handle 21 is rotated accurately one hundred and eighty degrees using the alignment block 32, so that the medicine inlet tube 24 is connected to the liquid delivery channel 25 through the first infusion channel 22, and then the medicine is delivered from the medicine inlet tube 24, so that the medicine flows to the corresponding position in the guide wire 1 through the liquid delivery channel 25, and finally the first handle 6 is rotated to make the first rod body 7 rotate inside the second rod body 10, and the guide head 8 follows the first rod body 7 to adjust the liquid outlet angle of the liquid delivery channel 25.

[0043] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0044] The present invention is intended to cover all such substitutions, modifications and changes that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A guidewire assembly for interventional treatment of abdominal aortic aneurysm, comprising a guidewire (1), the guidewire (1) being used to be inserted into the abdominal aorta (2) as a delivery track for a stent graft (14), two groups of iliac arteries (3) being arranged at the bottom end of the abdominal aorta (2), a tumor body (4) being arranged outside the abdominal aorta (2), a delivery head (5) being arranged at the outer end of the guidewire (1), a first handle (6), a first rod body (7) and a guide head (8) being sleeved on the outer side of the guidewire (1), the first handle (6) and the guide head (8) being fixedly connected at both ends of the first rod body (7), and a memory alloy frame (15) being arranged on the stent graft (14), characterized in that: The guidewire assembly comprises a stent installation mechanism and a function conversion mechanism, wherein the stent installation mechanism comprises a stent release module and a positioning expansion module, wherein the stent release module can release the coated stent (14) into the abdominal aorta (2) so that the coated stent (14) covers the position of the tumor (4), and the positioning expansion module can stably restrict the outer tube (12) to the outside of the coated stent (14) so ​​that the outer tube (12) will not separate from the outside of the coated stent (14) during transportation, and can also expand the released coated stent (14) so ​​that the outer side of the coated stent (14) is in closer contact with the inner wall of the abdominal aorta (2); The function conversion mechanism also includes a limit adjustment module and a drug delivery module. The limit adjustment module can allow the clamping block (30) to be clamped onto the memory alloy frame (15), so that the memory alloy frame (15) can drive the coated stent (14) to move slightly. The drug delivery module can timely inject various drugs required for the operation into the corresponding positions in the abdominal aorta (2).

2. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 1, characterized in that: The stent release module comprises a second handle (9) sleeved on the outside of a first rod body (7); the side of the second handle (9) is fixedly connected to a second rod body (10); the outside of the second rod body (10) is sleeved with a third handle (11) and an outer tube (12); the side of the third handle (11) is fixedly connected to the outer tube (12); an annular chamber (13) is provided on the outside of the second rod body (10); a coated stent (14) is placed between the annular chamber (13) and the outer tube (12).

3. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 2, characterized in that: The positioning expansion module comprises an expansion airbag (16) sleeved on the end of the second rod body (10), the outer side of the expansion airbag (16) is clamped in an annular clamping groove (17), and the annular clamping groove (17) is opened on the inner wall of the outer tube (12).

4. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 3, characterized in that: One end of the expansion airbag (16) is connected to one end of an air supply channel (18), the other end of the air supply channel (18) is connected to an air pump (19), and the air pump (19) is connected to a pressure relief valve (20) through an air supply pipe. The air supply channel (18) is opened in the second handle (9) and the second rod body (10).

5. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 1, characterized in that: The limit adjustment module comprises an annular handle (21) rotatably connected to the outside of the first handle (6); a first infusion channel (22) and a second infusion channel (23) are arranged inside the annular handle (21); a drug inlet tube (24) is arranged outside the first handle (6); the drug inlet tube (24) can be threadedly connected to various drug delivery tubes; the right end of the first infusion channel (22) can be connected to one end of a drainage channel (26); the other end of the drainage channel (26) is connected to an annular channel (27); the annular channel (27) is connected to a plurality of groups of piston chambers (28); a piston (29) is arranged inside the piston chamber (28); and a clamping block (30) is fixedly connected to the outside of the piston (29).

6. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 5, characterized in that: The first infusion channel (22) passes through both ends of the guide wire (1); the middle of the first infusion channel (22) is connected to one end of the second infusion channel (23); the other end of the second infusion channel (23) extends to the left side of the first handle (6); and by rotating the annular handle (21), the left ends of the first infusion channel (22) and the second infusion channel (23) can be switched to connect to the drug inlet tube (24).

7. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 5, characterized in that: A return spring (31) is sleeved on the outer side of the clamping block (30), and the return spring (31) is arranged in the piston chamber (28).

8. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 5, characterized in that: The entirety of the clamping block (30) is arranged in a rod shape, and the outer end of the clamping block (30) is arranged in a hemispherical shape.

9. A guidewire assembly for interventional treatment of abdominal aortic aneurysm according to claim 1, characterized in that: The drug delivery module comprises a liquid delivery channel (25) provided in the first handle (6), the first rod body (7) and the guide head (8); one end of the liquid delivery channel (25) is connectable to the first infusion channel (22), and the other end of the liquid delivery channel (25) extends to the outside of the guide head (8).

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