An interventional medical instrument

Abstract

The utility model discloses an interventional medical instrument relates to medical instrument technical field, including the guide wire body, the guide wire body is provided with the guide channel by the tail end to the head and along the radial extension, and the tail end of guide wire body is provided with the opening, at least one guide wire is provided in the guide channel, and the guide wire extends along the radial of guide wire body, and the head of guide wire extends to the outside through the guide wire body, and the tail end of guide wire extends to the outside by the opening of guide wire body tail end, in the first state, the head of guide wire is embedded in the guide wire body, in the second state, the head of guide wire is located outside the guide wire body and forms a plurality of support parts, in the utility model, the guide wire can move back and forth in the guide wire channel, in the first state, the guide wire body enters the aorta, and the guide wire does not cause the damage of blood vessel wall, in the second state, the head of guide wire body needs to be fixed, and the positioning effect is played through the guide wire.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an interventional medical device. Background Technology

[0002] The material used in interventional procedures for patent ductus arteriosus (PDA) is a PDA occluder, the most common being the mushroom-shaped occluder and the vascular plug occluder. Compared to traditional open-chest surgery, interventional occlusion surgery is less invasive, safer, simpler, and has fewer complications, effectively reducing patient pain.

[0003] During minimally invasive surgery, doctors use imaging technology to observe the location and size of the patent ductus arteriosus (PDA). After constructing a bridge through the guidewire to the lesion, an occluder is placed to close the lesion. The lesion is typically trapezoidal, funnel-shaped, window-shaped, or dumbbell-shaped, with a larger opening on the side closer to the aorta and a smaller opening on the side closer to the pulmonary artery. The doctor's manipulation of the guidewire tip through the unclosed lesion requires experience. However, the guidewire tip is relatively soft; excessive force can easily damage the tricuspid and pulmonary valves after passing through the lesion, while insufficient force can cause the guidewire to bend and fail to reach the lesion, leading to repeated friction and potentially iatrogenic injury. Another approach is to increase the guidewire diameter and stiffness, but improper operation can cause even greater damage to the lesion with the guidewire tip. Utility Model Content

[0004] To address the aforementioned technical problems, the present invention provides an interventional medical device comprising a guidewire body, wherein a guide channel is provided within the guidewire body extending radially from the tail end to the head end, and the tail end of the guidewire body is provided with an opening; at least one guidewire is provided within the guide channel, the guidewire extending radially along the guidewire body, the head end of the guidewire extending through the guidewire body to the outside, and the tail end of the guidewire extending to the outside from the opening at the tail end of the guidewire body.

[0005] Preferably, the diameter of the guide channel is larger than the outer diameter of the guide wire, and the guide wire can move axially along the guide channel; in the first state, the head end of the guide wire is embedded in the guide wire body; in the second state, the head end of the guide wire is located outside the guide wire body and forms multiple support portions.

[0006] Preferably, the guidewire body has at least one groove near the tip, the groove is located on the outer wall of the guidewire body, and the groove is used to accommodate the tip of the guidewire.

[0007] Preferably, the groove and the guide channel are connected by a guide wire hole, which extends radially along the guide wire body and is used to pass through the guide wire.

[0008] Preferably, a radiopaque area is provided near the tip of the guidewire body.

[0009] Preferably, it also includes a fastener connected to the opening at the tail end of the guidewire body for axial positioning of the guidewire.

[0010] Preferably, the fastener includes a limiting part and a fixing part, one end face of the fixing part is fixed to one end face of the limiting part, and the axis of the fixing part coincides with the axis of the limiting part.

[0011] Preferably, the fastener has at least one through hole along the axial direction, the through hole is used to pass through a guide wire, and the guide wire is interference-fitted with the inner wall of the through hole.

[0012] Preferably, a slot is provided at the opening at the tail end of the guidewire body, the slot extends radially along the guidewire body, and the slot communicates with the guide channel.

[0013] Preferably, the fixing part is frustum-shaped; the outer diameter of the limiting part is the same as the outer diameter of the guide wire body; The slot is adapted to the fixing part, and the fixing part is embedded in the slot, causing deformation at the through hole and increasing the friction between the inner wall of the through hole and the guide wire.

[0014] The technical effects and advantages of this invention are as follows: 1. In this invention, the guidewire can move back and forth in the guidewire channel. In the first state, the guidewire body enters the aorta and the guidewire will not cause damage to the blood vessel wall. In the second state, the tip of the guidewire body needs to be fixed, and the guidewire plays a positioning role.

[0015] 2. In this invention, the tip of the guidewire body is less likely to shake or fall off from the lesion site, reducing the difficulty of interventional catheterization, reducing the time of interventional catheterization, reducing the operation time, avoiding prolonged exposure of patients to X-rays, and reducing the risk of cell damage.

[0016] 3. In this invention, the guide wire body has a slot design for connecting the fastener and the guide wire body. The guide wire body has a low manufacturing cost. By making the fastener and the slot similar in structure, it is convenient to connect the fastener and the slot. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an interventional medical device provided in one embodiment of this application; Figure 2 This is a cross-sectional view of an interventional medical device provided in an embodiment of this application; Figure 3 This application provides an embodiment of an interventional medical device. Figure 2Enlarged structural diagram at point A; Figure 4 This application provides an embodiment of an interventional medical device. Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the structure of the first fastener in an interventional medical device provided in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an interventional medical device provided in another embodiment of this application; Figure 7 This is a cross-sectional view of an interventional medical device provided in another embodiment of this application; Figure 8 In another embodiment of the interventional medical device provided in this application Figure 7 Enlarged schematic diagram of the structure at point C; Figure 9 This is a schematic diagram of the structure of the second fastener in an interventional medical device provided in another embodiment of this application; Figure 10 This is a schematic diagram of the interventional medical device provided in another embodiment of this application when the guidewire body reaches and is fixed at the lesion site during interventional surgery.

[0018] In the figure: 1. Guide wire body; 101. Guide channel; 102. First groove; 103. Guide wire body hole; 104. Slot; 105. Second groove; 106. First guide wire hole; 2. First guide wire; 3. Development area; 4. First fastener; 41. First limiting part; 401. First through hole; 42. First fixing part; 5. Second guide wire; 6. Second fastener; 61. Second limiting part; 62. Second fixing part; 621. Second through hole; 622. Third through hole. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0020] This embodiment provides an interventional medical device, including a guidewire body. A guide channel extending radially from the tail end to the head end is provided within the guidewire body, and the tail end of the guidewire body has an opening. At least one guidewire is provided within the guide channel, extending radially along the guidewire body. The head end of the guidewire extends through the guidewire body to the outside, and the tail end of the guidewire extends to the outside from the opening at the tail end of the guidewire body. In a first state, the head end of the guidewire is embedded within the guidewire body; in a second state, the head end of the guidewire is located outside the guidewire body and forms multiple support portions.

[0021] Specifically, a guidewire is placed inside the guidewire body, which can serve as a guide and a positioning tool. In the first state, the guidewire body enters the aorta without causing damage to the vessel wall. In the second state, the tip of the guidewire body needs to be fixed, and the guidewire serves as a positioning tool, increasing the stability of the tip of the guidewire body.

[0022] Furthermore, the diameter of the guide channel is larger than the outer diameter of the guide wire, allowing the guide wire to move axially along the guide channel.

[0023] Specifically, the guidewire can move back and forth within the guidewire channel.

[0024] Furthermore, at least one groove is provided near the tip of the guidewire body. The groove is located on the outer wall of the guidewire body and is used to accommodate the tip of the guidewire.

[0025] Specifically, the groove set at the tip of the guidewire body can accommodate the guidewire, which has a simple structural design and low manufacturing cost.

[0026] Furthermore, the groove and the guide channel are connected by a guide wire hole that extends radially along the guide wire body and is used to pass through the guide wire.

[0027] Specifically, when the doctor pushes or pulls the guidewire from the back end, the guidewire moves back and forth along the guidewire hole.

[0028] Furthermore, a contrast-enhancing zone is provided near the tip of the guidewire body.

[0029] Specifically, the role of the imaging zone is to provide X-ray imaging markers for the working area at the tip of the guidewire body when it is inserted into the aorta, thus providing doctors with accurate diagnostic and surgical positioning information.

[0030] Furthermore, it also includes fasteners that connect to the opening at the tail end of the guidewire body to limit the axial movement of the guidewire.

[0031] Specifically, in the first state, the guide wire is relatively fixed by fasteners to prevent the guide wire from shaking and displacing significantly in the aorta. In the second state, the guide wire is fixed by fasteners to prevent the guide wire from shaking and displacing significantly in the pulmonary artery.

[0032] Furthermore, the fastener includes a limiting part and a fixing part, one end face of the fixing part is fixed to one end face of the limiting part, and the axis of the fixing part coincides with the axis of the limiting part.

[0033] Specifically, the fastener has a simple structural design and is easy to operate.

[0034] Furthermore, the fastener has at least one through hole along the axial direction, through which a guide wire is passed, and the guide wire is interference-fitted with the inner wall of the through hole.

[0035] Specifically, the fastener features a through hole connected to a guide wire, resulting in a simple structural design and low cost.

[0036] Furthermore, a slot is provided at the opening at the tail end of the guidewire body, the slot extends radially along the guidewire body, and the slot is connected to the guide channel.

[0037] Specifically, the guide wire body has a slot design for fastening the guide wire body connection, and the manufacturing cost of the guide wire body is relatively low.

[0038] Furthermore, the fixing part is frustum-shaped; the outer diameter of the limiting part is the same as the outer diameter of the guide wire body.

[0039] The slot and the fixing part are adapted to each other. The fixing part is embedded in the slot, which causes deformation at the through hole and increases the friction between the inner wall of the through hole and the guide wire.

[0040] Specifically, by making the fasteners and the slots structurally similar, the connection between the fasteners and the slots is made easier.

[0041] Please see Figures 1-2 In one specific embodiment, the interventional medical device includes a guidewire body 1, which has a guide channel 101 extending radially from the tail end to the head end, and the tail end of the guidewire body 1 has an opening.

[0042] In this embodiment, the guide wire is a first guide wire 2, which extends radially along the guide wire body 1. The head end of the first guide wire 2 penetrates the guide wire body 1, and the tail end of the first guide wire 2 extends outward from the opening at the tail end of the guide wire body 1. It also includes a fastener that is connected to the opening at the tail end of the guide wire body 1 to limit the axial movement of the first guide wire 2.

[0043] In this embodiment, the tip of the first guidewire 2 is close to the tip of the guidewire body 1, and the tip of the first guidewire 2 is located inside the guidewire body 1. The tip of the first guidewire 2 can pass through the tip of the guidewire body 1. When the guidewire body 1 enters the aorta, the tip of the first guidewire 2 is located inside the guidewire body 1. The tip of the first guidewire 2 will not protrude from the outer surface of the guidewire body 1 and will not affect the advancement of the guidewire body 1.

[0044] In this embodiment, the diameter of the guide channel 101 is larger than the outer diameter of the first guidewire 2. The first guidewire 2 can move axially along the guide channel 101. The doctor operates from the tail end of the first guidewire 2. When the first guidewire 2 is pushed forward, the length of the head end of the first guidewire 2 extending to the outside of the guidewire body 1 increases. Because the strength of the first guidewire 2 is relatively low relative to the guidewire body 1, the forward movement of the first guidewire 2 will not drive the guidewire body 1 to move forward. When the first guidewire 2 is pulled backward, the tip of the first guidewire 2 enters the guidewire body 1. Because the tip of the first guidewire 2 is mosquito coil shaped, friction will occur between the bent part of the first guidewire 2 and the guidewire body 1. The positions of the first guidewire 2 and the guidewire body 1 are relatively fixed, causing the guidewire body 1 to bend in the direction of extension of the first guidewire 2. Therefore, it can be seen that the greater the force of pulling the first guidewire 2 backward, the greater the bending angle of the guidewire body 1. The bending angle of the guidewire body 1 can be adjusted by the first guidewire 2, thereby adjusting the direction of the guidewire body 1 in the aorta. The first guidewire 2 can play a guiding role.

[0045] Furthermore, a contrast-enhancing zone 3 is provided near the tip of the guidewire body 1. The contrast-enhancing zone 3 uses a contrast-enhancing ring or a contrast-enhancing coating. The function of the contrast-enhancing zone is to provide X-ray contrast marking of the working area at the tip of the guidewire body 1 when it is inserted into the aorta, so as to provide doctors with accurate diagnostic and surgical positioning information.

[0046] The imaging ring is made of precious metals such as platinum, gold, titanium, or iridium and their alloys, which have good absorption capacity for X-rays. When X-rays pass through human tissue and are projected onto the guidewire body 1, the metal imaging ring will form clear and identifiable high-contrast image points in the imaging system, thereby helping doctors to more accurately determine the position and movement trajectory of the guidewire body 1, and improve the success rate and safety of the operation.

[0047] The developing coating is made of platinum-iridium alloy and tantalum, which has high density, high hardness and good corrosion resistance, and can produce clear images under X-ray or proton beam irradiation.

[0048] See Figure 3As shown, a first groove 102 is provided near the tip of the guidewire body 1. The first groove 102 is located on the outer wall of the guidewire body 1 and is used to accommodate the tip of the first guidewire 2. When the guidewire body 1 enters the aorta, the mosquito coil-shaped tip of the first guidewire 2 is located in the first groove 102, so as to avoid the tip of the first guidewire 2 from contacting the blood vessel wall as much as possible, and prevent the tip of the first guidewire 2 from causing iatrogenic damage to the blood vessel wall, thereby improving the safety of the operation.

[0049] Furthermore, the first groove 102 and the guide channel 101 are connected through the guide wire body hole 103. The guide wire body hole 103 extends radially along the guide wire body 1. The head end of the first guide wire 2 is embedded in the first groove 102, so that the head end of the first guide wire 2 is located on the inner side of the outer wall of the guide wire body 1.

[0050] When the first guide wire 2 is pulled backward, the tip of the first guide wire 2 enters the guide wire body 1. The first guide wire 2 rubs against the wall of the guide wire body hole 103. The positions of the first guide wire 2 and the guide wire body 1 are relatively fixed, causing the guide wire body 1 to bend in the direction of extension of the first guide wire 2.

[0051] See Figures 4-5 As shown, in this embodiment, the fastener is a first fastener 4, which includes a first limiting part 41 and a first fixing part 42. The first limiting part 41 is cylindrical, and its outer diameter is similar to that of the guidewire body 1. Preferably, the outer diameter of the first limiting part 41 is the same as that of the guidewire body 1. During interventional surgery, when the catheter is inserted into the aorta along the guidewire body 1, the first limiting part 41 will not obstruct the catheter.

[0052] The first fixing part 42 is frustum shaped. One end face of the first fixing part 42 is fixed to one end face of the first limiting part 41, and the axis of the first fixing part 42 coincides with the axis of the first limiting part 41. The end face of the first fixing part 42 with a smaller diameter is far away from the first limiting part 41.

[0053] The first fastener 4 has a through hole 401 along the axial direction. The first through hole 401 is used to pass through the first guide wire 2. The first guide wire 2 is interference-fitted with the inner wall of the first through hole 401.

[0054] Furthermore, a slot 104 is provided at the opening at the tail end of the guide wire body 1. The slot 104 extends radially along the guide wire body 1 and communicates with the guide channel 101. The slot 104 is adapted to the shape of the first fixing part 42. In this embodiment, the slot 104 is configured as a conical slot, and the larger opening of the conical slot faces outward.

[0055] Specifically, the tail end of the first guide wire 2 is inserted into one end of the first through hole 401 and exits at the other end. When the first guide wire 2 needs to be axially fixed, the first fixing part 42 is inserted into the slot 104. The first fixing part 42 is compressed and deformed, and the first through hole 401 is also deformed, increasing the friction between the inner wall of the first through hole 401 and the first guide wire 2. When the side wall of the first limiting part 41 contacts the tail end of the guide wire body 1, it stops, and the first fastener 4 is relatively fixed to the guide wire body 1, thereby fixing the first guide wire 2 to the guide wire body 1 and preventing the first guide wire 2 from axially displacing.

[0056] Furthermore, the first fastener 4 can be made of flexible materials such as silicone or PVC. When the first fastener 4 is inserted into the slot 104, it will deform, thereby fixing the first fastener 4.

[0057] Unlike existing technologies, in this embodiment, during the interventional procedure for patent ductus arteriosus, the doctor manipulates the guidewire body 1 from the artery to the lesion site of the patent ductus arteriosus. Since the lesion site is usually trapezoidal, funnel-shaped, window-shaped, or dumbbell-shaped, the opening at the aorta is larger and the opening at the pulmonary artery is smaller. By pulling the first guidewire 2 backward, the guidewire body 1 is bent, and the forward angle of the guidewire body 1 is adjusted, making it easier to pass through the lesion site from the aorta and enter the pulmonary artery, thus reducing iatrogenic injury.

[0058] In the first state, the first guidewire 2 is fixed relative to the guidewire body 1 by the first fastener 4 to prevent the first guidewire 2 from shaking or displacing significantly in the aorta. The tip of the first guidewire 2 is embedded in the guidewire body 1. The doctor manipulates the guidewire body 1 from the artery to the lesion site of the patent ductus arteriosus. The tip of the guidewire body 1 passes through the lesion site and enters the pulmonary artery. The first guidewire 2 is pushed forward, and the length of the tip of the first guidewire 2 extends into the pulmonary artery. After the tip of the first guidewire 2 contacts the pulmonary artery wall, the tail end of the first guidewire 2 is fixed to the guidewire body 1 by the first fastener 4. In the second state, the tip of the guidewire body 1 and the tip of the first guidewire 2 form two support parts. The first guidewire 2 plays a positioning role. When the doctor inserts the catheter along the guidewire body 1, the tip of the guidewire body 1 is less likely to shake or fall off from the lesion site, reducing the difficulty of the interventional catheter, reducing the interventional catheter time, reducing the operation time, avoiding prolonged exposure of the patient to X-rays, and reducing the risk of cell damage.

[0059] In another specific embodiment, see Figures 6-7 As shown, based on the above embodiment, the guide wire includes a first guide wire 2 and a second guide wire 5. The second guide wire 5 extends radially along the guide wire body 1. The head end of the second guide wire 5 extends through the guide wire body 1 to the outside, and the tail end of the second guide wire 5 extends from the opening at the tail end of the guide wire body 1 to the outside.

[0060] Furthermore, the fastener is a second fastener 6, which is connected to the opening at the tail end of the guide wire body 1 and is used to axially limit the first guide wire 2 and the second guide wire 5.

[0061] In this embodiment, the tip of the second guidewire 5 is close to the tip of the guidewire body 1, and the tip of the second guidewire 5 is located inside the guidewire body 1. The tip of the second guidewire 5 can pass through the tip of the guidewire body 1. When the guidewire body 1 enters the aorta, the tip of the second guidewire 5 will not protrude from the outer surface of the guidewire body 1 and will not affect the advancement of the guidewire body 1.

[0062] In this embodiment, the second guidewire 5 and the first guidewire 2 can be of the same size or different sizes. The diameter of the guide channel 101 is greater than the sum of the outer diameters of the first guidewire 2 and the second guidewire 5, so that both the first guidewire 2 and the second guidewire 5 can move axially along the guide channel 101. The doctor operates from the tail end of the first guidewire 2 or the second guidewire 5. When the first guidewire 2 or the second guidewire 5 is pushed forward, the length of the head end of the first guidewire 2 or the second guidewire 5 extending to the outside of the guidewire body 1 increases. Because the strength of the first guidewire 2 or the second guidewire 5 is relatively low relative to the guidewire body 1, the forward movement of the first guidewire 2 or the second guidewire 5 will not drive the guidewire body 1 to move forward. When the first guidewire 2 or the second guidewire 5 is pulled backward, the tip of the first guidewire 2 or the second guidewire 5 enters the guidewire body 1. Because the tip of the first guidewire 2 or the second guidewire 5 is mosquito coil shaped, friction will occur between the bent part of the first guidewire 2 or the second guidewire 5 and the guidewire body 1. The positions of the first guidewire 2 or the second guidewire 5 and the guidewire body 1 are relatively fixed, causing the guidewire body 1 to bend in the direction of extension of the first guidewire 2 or the second guidewire 5. Therefore, it can be seen that the greater the force of pulling the first guidewire 2 or the second guidewire 5 backward, the greater the bending angle of the guidewire body 1. The bending angle of the guidewire body 1 can be adjusted by the first guidewire 2 or the second guidewire 5, thereby adjusting the direction of the guidewire body 1 in the aorta. The first guidewire 2 or the second guidewire 5 can play a guiding role, allowing the guidewire body 1 to bend in two directions, making it easier for doctors to adjust the direction of advancement of the guidewire body 1.

[0063] See Figure 8 As shown, a second groove 105 is provided near the tip of the guidewire body 1. The second groove 105 is located on the outer wall of the guidewire body 1 and is used to accommodate the tip of the second guidewire 5. When the guidewire body 1 enters the aorta, the mosquito coil-shaped tip of the second guidewire 5 is located in the second groove 105 to avoid contact between the tip of the second guidewire 5 and the blood vessel wall as much as possible, thereby preventing iatrogenic damage to the blood vessel wall by the tip of the second guidewire 5 and improving the safety of the operation.

[0064] Furthermore, the second groove 105 and the guide channel 101 are connected through the first guide wire hole 106. The first guide wire hole 106 extends radially along the guide wire body 1. The head end of the second guide wire 5 is embedded in the second groove 105, so that the head end of the second guide wire 5 is located on the inner side of the outer wall of the guide wire body 1.

[0065] See Figure 9 As shown, the second fastener 6 includes a second limiting part 61 and a second fixing part 62. The second limiting part 61 is cylindrical, and the outer diameter of the second limiting part 61 is similar to the outer diameter of the guidewire body 1. Preferably, the outer diameter of the second limiting part 61 is the same as the outer diameter of the guidewire body 1. During interventional surgery, when the catheter is inserted into the aorta along the guidewire body 1, the second limiting part 61 will not obstruct the catheter.

[0066] The second fixing part 62 is frustum shaped. One end face of the second fixing part 62 is fixed to one end face of the second limiting part 61, and the axis of the second fixing part 62 coincides with the axis of the second limiting part 61. The end face of the second fixing part 62 with a smaller diameter is far away from the second limiting part 61.

[0067] The second fastener 6 has a through hole 621 and a third through hole 622 along the axial direction. The second through hole 621 is used to pass through the first guide wire 2. The first guide wire 2 is interference-fitted with the inner wall of the second through hole 621. The third through hole 622 is used to pass through the second guide wire 5. The second guide wire 5 is interference-fitted with the inner wall of the third through hole 622.

[0068] In this embodiment, a slot 104 is provided at the opening at the tail end of the guidewire body 1, and the slot 104 extends along the guidewire body 1. Extending radially, the slot 104 communicates with the guide channel 101. The slot 104 is adapted to the shape of the first fixing part 42. In this embodiment, the slot 104 is configured as a conical slot, and the larger opening of the conical slot faces outward.

[0069] Specifically, the tail end of the first guide wire 2 is inserted through one end of the second through hole 621 and exits through the other end. The tail end of the second guide wire 5 is inserted through one end of the third through hole 622 and exits through the other end. When the first guide wire 2 needs to be axially fixed, the second fixing part 62 is inserted into the slot 104. The second fixing part 62 is deformed by compression, and the second through hole 621 is also deformed, increasing the friction between the inner wall of the second through hole 621 and the first guide wire 2. When the side wall of the second fixing part 62 contacts the tail end of the guide wire body 1, it stops. The second fastener 6 is fixed relative to the guide wire body 1, thereby fixing the first guide wire 2 relative to the guide wire body 1 and preventing the first guide wire 2 from axially displacing.

[0070] Furthermore, the second fastener 6 can be made of flexible materials such as silicone or PVC. When the second fastener 6 is inserted into the slot 104, it will deform, thereby achieving the fixation of the second fastener 6.

[0071] It is understandable that if it is necessary to fix the axis of the second guide wire 5, the above method can be used to fix the second guide wire 5 relative to the guide wire body 1 to avoid axial displacement of the second guide wire 5. Alternatively, the first guide wire 2 and the second guide wire 5 can be fixed relative to the guide wire body 1 at the same time.

[0072] See Figure 10 As shown, in this embodiment, during the interventional procedure for patent ductus arteriosus, the doctor manipulates the guidewire body 1 from the artery to the lesion site of the patent ductus arteriosus. By pulling the first guidewire 2 or the second guidewire 5 backward, the guidewire body 1 is bent, and the forward angle of the guidewire body 1 is adjusted, making it easier to pass through the lesion site from the aorta and enter the pulmonary artery, thus reducing iatrogenic injury.

[0073] In the first state, the first guidewire 2 and the second guidewire 5 are fixed relative to the guidewire body 1 by the second fastener 6 to prevent large shaking and displacement of the first guidewire 2 and the second guidewire 5 in the aorta. The tips of the first guidewire 2 and the second guidewire 5 are both embedded in the guidewire body 1. The doctor operates the guidewire body 1 from the artery to the lesion site of the patent ductus arteriosus. After the tip of the guidewire body 1 passes through the lesion site and enters the pulmonary artery, the first guidewire 2 and the second guidewire 5 are pushed forward, increasing the length of the tips of the first guidewire 2 and the second guidewire 5 as they enter the pulmonary artery. After the tips of the first guidewire 2 and the second guidewire 5 contact the pulmonary artery wall, the second fastener 6 is used to secure the first guidewire 2 and the second guidewire 5. The tail end of the second guidewire 5 is fixed to the guidewire body 1. The tip of the first guidewire 2 and the tip of the second guidewire 5 are located in the pulmonary arteries on both sides of the lesion site. In the second state, the tip of the guidewire body 1, the tip of the first guidewire 2, and the tip of the second guidewire 5 form three support parts. The first guidewire 2 and the second guidewire 5 play a positioning role. When the doctor inserts the catheter along the guidewire body 1, the tip of the guidewire body 1 is less likely to shake or fall off from the lesion site, which further improves the stability of the tip of the guidewire body 1, further reduces the difficulty of the interventional catheter, reduces the interventional catheter time, reduces the operation time, avoids the patient being exposed to X-rays for a long time, and reduces the risk of cell damage.

[0074] It is important to understand that when the tip of the first guidewire 2 or the second guidewire 5 is closer to the tip of the guidewire body 1, the guidewire body 1 is more likely to bend when the first guidewire 2 or the second guidewire 5 is pulled, making it easier to adjust the direction of the guidewire body 1. Therefore, different guidewire bodies 1 can be produced according to the actual surgical needs, that is, the positions of the first guidewire 2 or the second guidewire 5 are different, and the distance between the tip of the first guidewire 2 or the tip of the second guidewire 5 and the tip of the guidewire body 1 is different, thereby meeting the needs of intervention at different depths of lesions.

[0075] In this embodiment, the first guidewire 2 and the second guidewire 5 are made of materials such as stainless steel or nickel-titanium alloy. Stainless steel guidewires have high strength and good corrosion resistance, but relatively low flexibility; while nickel-titanium alloy guidewires have higher flexibility and are more suitable for curved blood vessels. The material selection of the guidewire can be determined according to the specific surgical needs and the patient's vascular condition.

[0076] Furthermore, the surfaces of the first guidewire 2 and the second guidewire 5 are coated with a coating, including but not limited to polytetrafluoroethylene (Teflon), to increase their lubricity and biocompatibility, further avoiding damage to the aortic wall or pulmonary artery wall by the first guidewire 2 and the second guidewire 5, and improving the safety of the operation.

[0077] Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model. Structures, devices, and operating methods not specifically described and explained in this utility model, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. An interventional medical device, comprising a guidewire body, characterized in that, The guidewire body is provided with a guide channel extending radially from the tail end to the head end, and the tail end of the guidewire body is provided with an opening. At least one guide wire is provided in the guide channel. The guide wire extends radially along the guide wire body. The head end of the guide wire extends through the guide wire body to the outside, and the tail end of the guide wire extends from the opening at the tail end of the guide wire body to the outside. In the first state, the tip of the guidewire is embedded in the guidewire body; In the second state, the tip of the guidewire is located outside the guidewire body and forms multiple support portions.

2. The interventional medical device according to claim 1, characterized in that, The diameter of the guide channel is larger than the outer diameter of the guide wire, and the guide wire can move axially along the guide channel.

3. The interventional medical device according to claim 1, characterized in that, The guidewire body has at least one groove near the tip, the groove being located on the outer wall of the guidewire body, and the groove is used to accommodate the tip of the guidewire.

4. The interventional medical device according to claim 3, characterized in that, The groove and the guide channel are connected by a guide wire hole, which extends radially along the guide wire body and is used to pass through the guide wire.

5. The interventional medical device according to claim 1, characterized in that, A contrast-enhancing zone is provided near the tip of the guidewire body.

6. The interventional medical device according to claim 1, characterized in that, It also includes fasteners that connect to the opening at the tail end of the guidewire body for axial positioning of the guidewire.

7. An interventional medical device according to claim 6, characterized in that, The fastener includes a limiting part and a fixing part. One end face of the fixing part is fixed to one end face of the limiting part, and the axis of the fixing part coincides with the axis of the limiting part.

8. An interventional medical device according to claim 7, characterized in that, The fastener has at least one through hole along the axial direction, the through hole is used to pass through a guide wire, and the guide wire is interference-fitted with the inner wall of the through hole.

9. An interventional medical device according to claim 8, characterized in that, A slot is provided at the opening at the tail end of the guidewire body. The slot extends radially along the guidewire body and is connected to the guide channel.

10. An interventional medical device according to claim 9, characterized in that, The fixing part is truncated cone-shaped; the outer diameter of the limiting part is the same as the outer diameter of the guide wire body; the slot is adapted to the fixing part, and the fixing part is embedded in the slot, causing deformation at the through hole and increasing the friction between the inner wall of the through hole and the guide wire.

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