A multifunctional medical thrombectomy device

Abstract

This invention provides a multifunctional medical thrombectomy device. The variable-diameter guide wire, from distal to proximal, consists of a coarse-diameter distal winding wire, a fine-diameter distal winding wire, and a variable-diameter core wire. The delivery tube, from distal to proximal, consists of a distal marker, a collecting umbrella, a connecting marker, a thrombectomy net, a proximal marker, and the main body of the delivery tube. The variable-diameter core wire is inserted into the delivery tube. The coarse-diameter and fine-diameter distal winding wires exit from the distal end of the delivery tube. An inner limiter is fixed to the variable-diameter core wire at a position adjacent to the proximal end of the distal marker, and an inner limiter is fixed to the variable-diameter core wire at a position adjacent to the proximal end of the connecting marker. The outer diameter of the inner limiter is larger than the inner diameters of the distal and connecting markers, and the outer diameter of the inner limiter is larger than the inner diameters of the connecting and proximal markers. The outer diameter of the coarse-diameter distal winding wire is larger than the inner diameter of the distal marker. The length of the variable-diameter core wire is shorter than the length of the collecting umbrella, and the length of the collecting umbrella is shorter than the length of the thrombectomy net. This technical solution integrates the thrombectomy support, embolism protection system, and guide wire into one unit, simplifying the thrombectomy process and thus improving the success rate.

Description

Technical Field

[0001] This utility model relates to a thrombectomy device, and more particularly to a multifunctional medical thrombectomy device, belonging to the field of medical devices. Background Technology

[0002] Stroke is a serious and difficult-to-treat disease that severely endangers human health and life worldwide, characterized by high incidence, high disability rate, and high mortality rate. In recent years, the incidence rate among Chinese residents has been on the rise. The "China Stroke Prevention and Control Report (2023)" shows that on average, one person in my country experiences a first-time or recurrent stroke every 10 seconds, and one person dies from stroke every 28 seconds. The number of stroke patients aged 40 and above has reached 12.42 million, and the affected population is gradually becoming younger. According to data from the "China Health Statistics Yearbook (2020)," the number of discharged stroke patients, especially ischemic stroke patients, and the average inpatient medical expenses in my country both increased from 2010 to 2019. In 2019, the number of discharged ischemic stroke patients in my country was 4,335,072, and the number of hemorrhagic stroke patients was 611,709, representing increases of approximately four times and two times respectively compared to 2010.

[0003] In fact, during an acute cerebral infarction, neurons die at a rate of 1.9 million per minute, causing irreversible damage to the brain. Therefore, the earlier a stroke is treated, the lower the probability of disability. The longer the stroke lasts and the later the patient receives treatment, the greater the likelihood of death and subsequent disabilities such as speech difficulties, memory impairment, or limb paralysis.

[0004] Currently, mechanical thrombectomy has become one of the important methods for treating acute ischemic stroke. With the optimization of interventional devices, the clinical application of mechanical thrombectomy is becoming more and more widespread, becoming a first-line treatment for patients with large vessel occlusion. Different interventional devices are used depending on the type of lesion, but all carry the risk of thrombus escape, increasing the probability of distal small vessel occlusion. To address this, embolization protection systems have been developed. However, in routine interventional procedures, when these devices are used in conjunction with thrombectomy stents, the operation needs to be performed in stages and at different times, increasing the success rate of thrombectomy but also prolonging the thrombectomy time. Utility Model Content

[0005] To address the technical problem that "the embolization protection system, when used in conjunction with the thrombectomy stent, requires step-by-step and time-based operation, which increases the success rate of thrombectomy but also prolongs the thrombectomy time," this utility model provides a multifunctional medical thrombectomy device, the technical solution of which is as follows:

[0006] A multifunctional medical thrombectomy device comprises a variable-diameter guide wire consisting of a coarse-diameter distal winding wire, a fine-diameter distal winding wire, and a variable-diameter core wire, arranged from distal to proximal. A delivery tube consists of a distal marker, a collecting umbrella, a connecting marker, a thrombectomy net, a proximal marker, and the main body of the delivery tube, arranged from distal to proximal. The variable-diameter core wire is inserted into the delivery tube. The coarse-diameter distal winding wire and the fine-diameter distal winding wire exit from the distal end of the delivery tube. An inner limiter is fixed to the variable-diameter core wire at a position adjacent to the proximal end of the distal marker. An inner limiter is fixed to the variable-diameter core wire at a position adjacent to the proximal end of the connecting marker. The outer diameter of the inner limiter is larger than the inner diameters of the distal marker and the connecting marker. The outer diameter of the inner limiter is larger than the inner diameters of the connecting marker and the proximal marker. The outer diameter of the coarse-diameter distal winding wire is larger than the inner diameter of the distal marker. The length of the fine-diameter distal winding wire is 5-30 mm shorter than the length of the collecting umbrella, and the length of the collecting umbrella is 5-30 mm shorter than the length of the thrombectomy net.

[0007] The variable-diameter guidewire controls the expansion and contraction of the collection umbrella and the thrombectomy net. The collection umbrella collects escaped thrombus fragments. It can contract or expand synchronously with the collection umbrella under the control of the variable-diameter guidewire. The delivery tube provides a channel for the variable-diameter guidewire. The junction of the larger-diameter distal winding and the smaller-diameter distal winding is completed by welding or bonding. The thrombectomy net is made of woven or laser-cut metal. The collection umbrella and the thrombectomy net have the same outer diameter when compressed. The larger-diameter distal winding, in addition to its guiding function, also serves a limiting function, controlling the collection umbrella from compressed to expanded state during instrument expansion.

[0008] Optionally, the collecting umbrella is made of woven metal wire.

[0009] Optionally, an anchoring member is fixedly connected to the proximal end of the delivery pipe, and the anchoring member is provided with a tubular channel communicating with the delivery pipe.

[0010] Optionally, the proximal end of the variable diameter guide wire is connected to a movable component.

[0011] Optionally, the movable components, from far to near, are a stepping adjustment shaft and an anti-rotation device.

[0012] The stepper adjustment shaft and the variable diameter core wire are fixed together using adhesive or welding processes. The stepper adjustment shaft is made of an elastic material.

[0013] Optionally, the stepping adjustment shaft is disposed in the tubular channel via a threaded connection.

[0014] The distance the stepping adjustment shaft rotates in the tubular channel is matched with the length of the bolt mesh in its compressed state.

[0015] Optionally, the proximal end of the anti-rotation device is fixedly connected to the stepper adjustment shaft, and the distal end of the anti-rotation device is rotatably connected to the proximal end of the anti-rotation device.

[0016] Optionally, the distal marker, the link marker, and the proximal marker are all made of a radiopaque material.

[0017] Optionally, the main body of the delivery pipe is made of a polymer material.

[0018] Optionally, the main body of the conveying pipe is made of a composite of polymer and metal materials.

[0019] Compared to existing technologies, the advantages of this invention's technical solution are as follows: The multifunctional thrombectomy device of this invention can control the expansion or contraction of the collecting umbrella and thrombectomy net via a variable-diameter guidewire. The thrombectomy net is manually expandable, allowing the operator to control the cutting degree according to the vessel diameter and lesion type. This significantly simplifies the interventional surgical procedure. The thrombectomy stent, embolization protection system, and guidewire are integrated into one unit, simplifying the thrombectomy process and thus improving the success rate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the multifunctional thrombus removal device provided in the embodiment of this utility model in its compressed state;

[0021] Figure 2 This is a schematic diagram of the multifunctional thrombectomy device in its expanded state according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the variable diameter guide wire structure provided in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the anchoring component and the movable component provided in the embodiment of the present invention in the compressed state of the multifunctional bolt removal device;

[0024] Figure 5 This is a schematic diagram of the structure of the anchoring component and the movable component provided in the embodiment of the present invention in the expanded state of the multifunctional bolt removal device;

[0025] Figure 6 This is a schematic diagram of the movable component structure provided in an embodiment of the present utility model;

[0026] Figure 7 This is a schematic diagram simulating the functional thrombectomy device provided in this embodiment of the invention within a blood vessel;

[0027] In the diagram: 1. Variable diameter guide wire; 1001. Larger diameter distal winding wire; 1002. Smaller diameter distal winding wire; 103. Variable diameter core wire; 2. Distal end mark; 3. Collection umbrella; 4. Umbrella inner limit; 5. Link mark; 6. Seal net; 7. Net inner limit; 8. Proximal end mark; 9. Conveying pipe; 10. Anchoring component; 11. Movable component; 1110. Anti-rotation device; 1120. Stepping adjustment shaft. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art are within the protection scope of this utility model.

[0029] The present invention will now be described in detail with reference to the embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.

[0030] During the use of the thrombectomy device described below, the end furthest from the operator is the distal end, and the end closest to the operator is the proximal end. Example

[0031] This embodiment provides a multifunctional medical thrombectomy device. The variable-diameter guide wire 1 consists of, from distal to proximal, a coarse-diameter distal winding wire 1001, a fine-diameter distal winding wire 1002, and a variable-diameter core wire 103. The delivery tube 9 consists of, from distal to proximal, a distal marker 2, a collecting umbrella 3, a connecting marker 5, a thrombectomy net 6, a proximal marker 8, and the main body of the delivery tube. The variable-diameter core wire 103 is inserted into the delivery tube 9. The coarse-diameter distal winding wire 1001 and the fine-diameter distal winding wire 1002 exit from the distal end of the delivery tube 9. The variable-diameter core wire 103 is marked at the distal end. 2. An inner limiter 4 is fixed at the proximal adjacent position. An inner limiter 7 is fixed at the proximal adjacent position of the variable diameter core wire 103. The outer diameter of the inner limiter 4 is larger than the inner diameter of the distal mark 2 and the link mark 5. The outer diameter of the inner limiter 7 is larger than the inner diameter of the link mark 5 and the proximal mark 8. The outer diameter of the coarse diameter distal winding wire 1001 is larger than the inner diameter of the distal mark 2. The length of the fine diameter distal winding wire 1002 is 5 mm shorter than the length of the collecting umbrella 3. The length of the collecting umbrella 3 is 5 mm shorter than the length of the tethering net 6.

[0032] For example, when expansion is required, the proximal end of the variable diameter core wire 103 is pulled by 5 mm, and the proximal end of the coarse diameter distal winding wire 1001 approaches the distal end mark 2. The proximal end of the coarse diameter distal winding wire 1001 applies a force proximal to the collecting umbrella 3, causing the collecting umbrella 3 to expand. The inner limit 4 of the umbrella approaches the link mark 5, and the inner limit 4 applies a force proximal to the capping net 6, causing the capping net 6 to expand. When contraction is required, the proximal end of the variable diameter core wire 103 is pushed, and the inner limit 4 of the umbrella approaches the distal end mark 2. The inner limit 4 of the umbrella applies a force distal to the collecting umbrella 3, causing the collecting umbrella 3 to contract. The inner limit 7 of the net approaches the link mark 5, and the inner limit 7 applies a force distal to the capping net 6, causing the capping net 6 to contract.

[0033] For example, such as Figure 7The multifunctional thrombectomy device shown requires the use of a microcatheter. During use, the microcatheter is first placed inside the blood vessel, and the multifunctional thrombectomy device is pushed into the microcatheter through the connected guide sheath. The variable diameter guide wire 1 in the device can be used as a guide wire for guidance, and then the thrombectomy operation can be performed inside the blood vessel.

[0034] In some specific embodiments, the distal winding wire 1002 without a fine diameter is omitted, and the thrombectomy net 6 is designed for manual expansion. After the device is inserted into the blood vessel, the collecting umbrella expands according to the vessel size to achieve distal thrombus interception. Subsequently, the thrombectomy net 6 performs thrombectomy through the cooperation of the anchoring member 10 and the movable member 11. When retrieving the device, the inner limit 4 of the umbrella approaches the distal marker 2, and the inner limit 4 applies a distal force to the collecting umbrella 3, causing the collecting umbrella 3 to contract, thus completing the retrieval operation.

[0035] Among them, the umbrella inner limit 4 and the net inner limit 7 are designed to standardize the size of the collection umbrella 3 and the thrombectomy net 6. At the same time, the two limits are also set with extra margin, so that the operator can manually enhance the thrombectomy net 7's ability to cut thrombi.

[0036] Among them, the collecting umbrella 3 is a self-expanding design, which allows the collecting umbrella 3 to automatically adapt to the inner wall of the blood vessel.

[0037] In some specific embodiments, the collecting umbrella is made of woven metal wire.

[0038] In some specific embodiments, the near end of the delivery pipe 9 is fixedly connected to the anchoring member 10, and the anchoring member 10 is provided with a tubular channel communicating with the delivery pipe 9.

[0039] In some specific embodiments, the variable diameter guide wire 1 is connected to the movable member 11 at its proximal end.

[0040] In some specific embodiments, the movable components 11, from far to near, are a stepping adjustment shaft 1120 and an anti-rotation device 1110.

[0041] Among them, the anti-rotation device 1110 ensures that the remote end of the device will not wag its tail during the rotation of the movable component 11.

[0042] In some specific embodiments, the stepping adjustment shaft 1120 is disposed in the tubular channel via a threaded connection.

[0043] In some specific embodiments, the proximal end of the anti-rotation device 1110 is fixedly connected to the stepping adjustment shaft 1120, and the distal end of the anti-rotation device 1110 is rotatably connected to the proximal end of the anti-rotation device 1110.

[0044] In some specific embodiments, the distal marker 2, the link marker 5, and the proximal marker 8 are all made of a non-transparent material.

[0045] In some specific embodiments, the main body of the delivery pipe is made of polymer material. Example

[0046] like Figures 1 to 3 As shown, this embodiment provides a medical multifunctional thrombectomy device. The variable-diameter guide wire 1, from distal to proximal, consists of a coarse-diameter distal winding wire 1001, a fine-diameter distal winding wire 1002, and a variable-diameter core wire 103. The delivery tube 9, from distal to proximal, consists of a distal marker 2, a collecting umbrella 3, a connecting marker 5, a thrombectomy net 6, a proximal marker 8, and the main body of the delivery tube. The variable-diameter core wire 103 is inserted into the delivery tube 9. The coarse-diameter distal winding wire 1001 and the fine-diameter distal winding wire 1002 exit from the distal end of the delivery tube 9. The variable-diameter core wire 103 is located proximal to the distal marker 2. An inner limiter 4 is fixed at an adjacent position. An inner limiter 7 is fixed at the adjacent position near the link mark 5 of the variable diameter core wire 103. The outer diameter of the inner limiter 4 is greater than the inner diameter of the far end mark 2 and the link mark 5. The outer diameter of the inner limiter 7 is greater than the inner diameter of the link mark 5 and the near end mark 8. The outer diameter of the coarse diameter far end winding wire 1001 is greater than the inner diameter of the far end mark 2. The length of the fine diameter far end winding wire (1002) is less than the length of the collecting umbrella (3) by 30 mm. The length of the collecting umbrella (3) is less than the length of the tethering net (6) by 30 mm.

[0047] For example, when expansion is required, the proximal end of the variable diameter core wire 103 is pulled 30mm, and the proximal end of the coarse diameter distal winding wire 1001 approaches the distal end mark 2. The proximal end of the coarse diameter distal winding wire 1001 applies a force proximal to the collecting umbrella 3, causing the collecting umbrella 3 to expand. The inner limit 4 of the umbrella approaches the link mark 5, and the inner limit 4 applies a force proximal to the capping net 6, causing the capping net 6 to expand. When contraction is required, the proximal end of the variable diameter core wire 103 is pushed, and the inner limit 4 of the umbrella approaches the distal end mark 2. The inner limit 4 of the umbrella applies a force distal to the collecting umbrella 3, causing the collecting umbrella 3 to contract. The inner limit 7 of the net approaches the link mark 5, and the inner limit 7 applies a force distal to the capping net 6, causing the capping net 6 to contract.

[0048] For example, such as Figure 7 The multifunctional thrombectomy device shown requires the use of a microcatheter. During use, the microcatheter is first placed inside the blood vessel, and the multifunctional thrombectomy device is pushed into the microcatheter through the connected guide sheath. The variable diameter guide wire 1 in the device can be used as a guide wire for guidance, and then the thrombectomy operation can be performed inside the blood vessel.

[0049] In some specific implementations, the collecting umbrella 3 is a self-expanding design, and the tethering net 6 is a manually expanding design.

[0050] Among them, the umbrella inner limit 4 and the net inner limit 7 are designed to standardize the size of the collection umbrella 3 and the thrombectomy net 6. At the same time, the two limits are also set with extra margin, so that the operator can manually enhance the thrombectomy net 7's ability to cut thrombi.

[0051] Among them, the collecting umbrella 3 is a self-expanding design, which allows the collecting umbrella 3 to automatically adapt to the inner wall of the blood vessel.

[0052] In some specific embodiments, the collecting umbrella is made of woven metal wire.

[0053] In some specific embodiments, the near end of the delivery pipe 9 is fixedly connected to the anchoring member 10, and the anchoring member 10 is provided with a tubular channel communicating with the delivery pipe 9.

[0054] In some specific embodiments, the variable diameter guide wire 1 is connected to the movable member 11 at its proximal end.

[0055] In some specific embodiments, the movable components 11, from far to near, are a stepping adjustment shaft 1120 and an anti-rotation device 1110.

[0056] Among them, the anti-rotation device 1110 ensures that the remote end of the device will not wag its tail during the rotation of the movable component 11.

[0057] In some specific embodiments, the stepping adjustment shaft 1120 is disposed in the tubular channel via a threaded connection.

[0058] In some specific embodiments, the proximal end of the anti-rotation device 1110 is fixedly connected to the stepping adjustment shaft 1120, and the distal end of the anti-rotation device 1110 is rotatably connected to the proximal end of the anti-rotation device 1110.

[0059] In some specific embodiments, the distal marker 2, the link marker 5, and the proximal marker 8 are all made of a non-transparent material.

[0060] In some specific embodiments, the main body of the conveying pipe is made of a composite of polymer and metal materials.

[0061] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A medical multifunctional thrombectomy device, characterized by, The variable diameter guide wire (1) consists of, from far to near, a thicker diameter distal winding wire (1001), a thinner diameter distal winding wire (1002), and a variable diameter core wire (103). The delivery pipe (9) consists of, from far to near, a distal marker (2), a collecting umbrella (3), a linking marker (5), a tethering net (6), a proximal marker (8), and the main body of the delivery pipe. The variable diameter core wire (103) is threaded through the delivery pipe (9). The thicker diameter distal winding wire (1001) and the thinner diameter distal winding wire (1002) emerge from the distal end of the delivery pipe (9). The variable diameter core wire (103) is fixed to the umbrella at a position adjacent to the proximal end of the distal marker (2). Limit (4), the variable diameter core wire (103) is fixed with an inner limit (7) at the position adjacent to the near end of the link mark (5), the outer diameter of the inner limit (4) is greater than the inner diameter of the far end mark (2) and the link mark (5), the outer diameter of the inner limit (7) is greater than the inner diameter of the link mark (5) and the near end mark (8), the outer diameter of the thick diameter far end winding wire (1001) is greater than the inner diameter of the far end mark (2), the length of the thin diameter far end winding wire (1002) is 5-30mm less than the length of the collecting umbrella (3), and the length of the collecting umbrella (3) is 5-30mm less than the length of the tethering net (6).

2. The medical multifunctional thrombectomy device, as claimed in claim 1, wherein, The collecting umbrella (3) is woven from metal wire.

3. The medical multifunctional thrombectomy device according to claim 1, characterized in that, The near end of the delivery pipe (9) is fixedly connected to the anchoring member (10), and the anchoring member (10) is provided with a tubular channel communicating with the delivery pipe (9).

4. A medical multifunctional thrombectomy device according to claim 3, characterized in that, The variable diameter guide wire (1) is connected to the movable component (11) at its proximal end.

5. A medical multifunctional thrombectomy device according to claim 4, characterized in that, The movable components (11) from far to near are a step adjustment shaft (1120) and an anti-rotation device (1110).

6. A multifunctional medical thrombectomy device according to claim 5, characterized in that, The stepping adjustment shaft (1120) is installed in the tubular channel via a threaded connection.

7. A multifunctional medical thrombectomy device according to claim 5, characterized in that, The anti-rotation device (1110) is fixedly connected to the stepping adjustment shaft (1120) at its proximal end, and the anti-rotation device (1110) is rotatably connected to the proximal end of the anti-rotation device (1110) at its distal end.

8. A multifunctional medical thrombectomy device according to claim 1, characterized in that, The distal marker (2), the link marker (5), and the proximal marker (8) are all made of a non-transparent material.

9. A multifunctional medical thrombectomy device according to claim 1, characterized in that, The main body of the delivery pipe is made of polymer material.

10. A medical multifunctional thrombectomy device according to claim 1, characterized in that, The main body of the conveying pipe is made of a composite of polymer and metal materials.

Images