Multifunctional thrombus suction device

Abstract

The present application relates to the technical field of medical tools, in particular to a multifunctional thrombus suction device, which comprises an outer catheter and an inner catheter movably arranged in the outer catheter, a collecting net is installed at the distal end of the inner catheter, a fixing block and a traction block are arranged on the inner wall of the inner catheter close to the collecting net, a plurality of triangular blocks are arranged between the fixing block and the traction block in sequence, the triangular blocks are provided with first sliding holes penetrating through both sides, the fixing block is provided with second sliding holes aligned with the first sliding holes, a traction wire is arranged in the inner catheter, and the traction wire is fixedly connected with the traction block after sequentially passing through the second sliding holes and all the first sliding holes. The present application solves the problem that most of the current steel wires are basically attached to the inner wall and the sliding of the steel wire is realized through the steel wire hole, thereby driving the adjustment of the bending of the end part. However, the bending adjustment mode has limited adjustment angle, and with the increase of the adjustment bending, the adjustment difficulty also increases, which is not conducive to the bending adjustment in complex blood vessel positions.

Description

Technical Field

[0001] This invention relates to the field of medical tool technology, specifically to a multifunctional thrombus aspiration device. Background Technology

[0002] A thrombus is an abnormal blood clot that forms at the site of damage or repair to the inner wall of a blood vessel in the cardiovascular system. It consists of insoluble fibrin, deposited platelets, accumulated white blood cells, and trapped red blood cells. When a thrombus forms and blocks a blood vessel, it interrupts blood flow and causes serious clinical consequences. For example, coronary artery blockage leads to myocardial infarction, cerebral artery blockage leads to cerebral infarction, pulmonary artery blockage causes pulmonary embolism, and arteriovenous embolism in the limbs causes limb infarction. All of these conditions can be life-threatening and require timely intervention.

[0003] Existing aspiration devices typically employ a wire pulling mechanism. The wire slides along the inner wall of the catheter, and the catheter is bent by pulling the corresponding wire position during adjustment. Currently, most wires are designed to fit snugly against the inner wall, and the wire slides through a hole to adjust the curvature of the end. However, this method has limited adjustment angles, and the difficulty of adjustment increases with the curvature, making it unsuitable for adjusting curvature in complex vascular locations. Summary of the Invention

[0004] The purpose of this invention is to provide a multifunctional thrombus aspiration device that solves the problem that most current steel wires are basically attached to the inner wall and slide through the wire holes to adjust the curvature of the end. However, this method of adjustment has limited adjustment angle, and the difficulty of adjustment increases with the increase of the curvature, which is not conducive to the curvature adjustment in complex vascular locations.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A multifunctional thrombus aspiration device includes an external catheter and an internal catheter movably disposed within the external catheter. An expandable, funnel-shaped collection net is installed at the distal end of the internal catheter. Fixing blocks and traction blocks are spaced apart along the length of the internal catheter near the collection net. Several triangular blocks are arranged sequentially between the fixing and traction blocks along the length of the internal catheter. A first sliding hole penetrating both sides is provided near the apex of each triangular block along the length of the internal catheter. A second sliding hole aligned with the first sliding hole is provided on the fixing block. A traction wire is disposed within the internal catheter, passing sequentially through the second sliding hole and all the first sliding holes before being fixedly connected to the traction block. A first control handle is provided on the internal catheter away from the collection net, and a control block for controlling the movement of the traction wire within the internal catheter is provided on the first control handle.

[0006] A further technical solution is that a connecting hole is provided in the first control handle, which extends through both ends. The proximal end of the inner catheter is installed in the connecting hole. A sliding groove is provided on the upper side of the first control handle along the length of the connecting hole. The bottom of the sliding groove is connected to the connecting hole through a strip hole. A control block is slidably arranged in the sliding groove. A connecting strip is provided in the strip hole. One end of the connecting strip is connected to the proximal end of the traction wire in the connecting hole. The other end of the connecting strip is connected to the control block. A sealing block for sealing the end of the inner catheter is provided at the distal end. A first sealing hole for allowing the traction wire to pass through is provided on the sealing block.

[0007] A further technical solution is that the upper side of the control block is recessed with a pressing groove, an upper pressing block is movably arranged inside the pressing groove, an elastic groove is provided at the bottom of the pressing groove, a lower pressing block is movably arranged inside the elastic groove, the lower end of the lower pressing block is connected to the bottom of the elastic groove through a spring, and the upper end is connected to the upper pressing block. The groove wall of the sliding groove is recessed along the length direction with a positioning groove, the upper groove wall of the positioning groove is provided with a first friction layer, and the side wall of the control block is provided with a connecting hole at the position corresponding to the positioning groove, which is connected to the pressing groove. A card is movably arranged in the connecting hole, one end of the card is placed in the positioning groove and a second friction layer is provided on the upper side, and the other end of the card is connected to the upper pressing block.

[0008] A further technical solution includes a first guidewire, the proximal end of which is connected to a third control handle, and the distal end of the first guidewire enters the inner catheter through a connection hole. An expandable capture net is provided at the distal end of the first guidewire.

[0009] A further technical solution includes a second guidewire, with a fourth control handle connected to the proximal end of the second guidewire and a stripping element provided at the distal end of the second guidewire.

[0010] A further technical solution is to provide a second sealing hole on the sealing block that allows the first guide wire to pass through and a third sealing hole that allows the second guide wire to pass through.

[0011] A further technical solution is that the stripping component includes an arc-shaped rib, one side of which has an opening and closing groove along its length, and stripping pieces are provided on both sides of the opening and closing groove. The rib is made of an elastic material.

[0012] A further technical solution is that a control through hole is provided in the first guide wire, and a third guide wire is movably arranged in the control through hole. The proximal end of the third guide wire is placed in the fourth control handle, and an actuating block is provided on the fourth control handle to drive the third guide wire to move. The capture net is arranged at the distal end of the third guide wire.

[0013] A further technical solution is to connect the inner catheter to a negative pressure suction device via a suction tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are: when it is necessary to adjust the orientation of the distal end of the inner catheter, by pulling the traction wire, the traction block and the traction wire work together to drive the tips of the arranged triangular blocks to converge, thereby causing the distal end of the inner catheter to bend. Moreover, the bending direction is clear, and the bending angle can exceed 90 degrees, which can cope with complex vascular environments. Furthermore, based on the cooperation of the inner and outer catheters, the inner catheter can be rotated inside the outer catheter to adjust the bending orientation, without the need to set up multiple traction wires to control bending in different directions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a multifunctional thrombus aspiration device according to the present invention.

[0016] Figure 2 This is a schematic diagram of the inner catheter of a multifunctional thrombus aspiration device according to the present invention.

[0017] Figure 3 for Figure 2 A magnified view of the area marked A in the middle.

[0018] Figure 4 This is a schematic diagram of the first and second control handles of a multifunctional thrombus aspiration device of the present invention.

[0019] Figure 5 This is a cross-sectional schematic diagram of the control block of a multifunctional thrombus aspiration device according to the present invention.

[0020] Figure 6 This is a schematic diagram of the stripping component of a multifunctional thrombus aspiration device according to the present invention. Figure 7 This is a schematic diagram of the second and third guide wires of a multifunctional thrombus aspiration device of the present invention.

[0021] Icons: 1-Outer guide tube, 2-Inner guide tube, 3-Collection net, 4-Fixing block, 5-Traction block, 6-Triangle block, 7-First sliding hole, 8-Second sliding hole, 9-Traction wire, 10-First control handle, 11-Control block, 12-Second control handle, 13-Through hole, 16-Connecting hole, 17-Sliding groove, 18-Strip hole, 20-Connecting strip, 21-Sealing block, 22-Pressing groove, 23-Upper pressure block, 24-Elastic 25-Slot, 26-Pressure block, 27-Spring, 28-Positioning strip slot, 29-Connecting hole, 30-Card, 31-Second friction layer, 32-First guide wire, 33-Third control handle, 34-Capture net, 35-Second guide wire, 36-Fourth control handle, 37-Peeling component, 38-Bone rod, 39-Opening and closing slot, 40-Peeling piece, 41-Control through hole, 42-Third guide wire, 43-Suction tube, 44-Negative pressure suction device. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In thrombus aspiration surgery, a puncture is made in the leg to enter a blood vessel. Here, "proximal" and "distal" refer to the end closer to the leg during the procedure being the proximal end, and the end entering the blood vessel being the distal end.

[0023] Figures 1 to 7 The image shows an embodiment of the present invention.

[0024] Example: A multifunctional thrombus aspiration device includes an external catheter 1 and an internal catheter 2 movably disposed within the external catheter 1. The distal end of the internal catheter 2 is fitted with an expandable, funnel-shaped collection net 3. The inner wall of the internal catheter 2, near the collection net 3, is spaced along its length by fixing blocks 4 and traction blocks 5. Between the fixing blocks 4 and traction blocks 5, a plurality of triangular blocks 6 are arranged sequentially along the length of the internal catheter 2. Near the apex of each triangular block 6, a first sliding hole 7 penetrating both sides is provided along the length of the internal catheter 2. The fixing block 4 is provided with a second sliding hole 8 aligned with the first sliding hole 7. A traction wire 9 is disposed within the internal catheter 2. The traction wire 9 passes sequentially through the second sliding hole 8 and all the first sliding holes 7 before being fixedly connected to the traction block 5. The internal catheter 2, located away from the collection net 3, is provided with a first control handle 10. The first control handle 10 is provided with a control block 11 for controlling the movement of the traction wire 9 within the internal catheter 2. When it is necessary to adjust the distal orientation of the inner catheter 2, pulling the traction wire 9, in conjunction with the traction block 5 and the traction wire 9, causes the tips of the arranged triangular blocks 6 to converge, thereby bending the distal end of the inner catheter 2. This bending direction is precise, and the bending angle can exceed 90 degrees, enabling it to handle complex vascular environments. Furthermore, based on the cooperation between the inner catheter 2 and the outer catheter 1, the inner catheter 2 can be rotated within the outer catheter 1 to adjust the bending direction, eliminating the need for multiple traction wires 9 to control bending in different directions. Both the outer catheter 1 and the inner catheter 2 are made of elastic material, allowing them to bend along with the vessel during insertion.

[0025] The proximal end of the outer conduit 1 is equipped with a second control handle 12. The second control handle 12 is provided with a through hole 13 that passes through both ends. The proximal end of the outer conduit 1 is connected to one end of the through hole 13. The inner conduit 2 passes through the through hole 13 into the outer conduit 1. A sealing ring is provided in the through hole 13 to seal the gap between the through hole 13 and the outer wall of the inner conduit 2.

[0026] The first control handle 10 has a connecting hole 16 extending through both ends. The proximal end of the inner catheter 2 is installed in the connecting hole 16. A sliding groove 17 is provided on the upper side of the first control handle 10 along the length of the connecting hole 16. The bottom of the sliding groove 17 is connected to the connecting hole 16 through a slot 18. A control block 11 is slidably disposed in the sliding groove 17. A connecting strip 20 is disposed in the slot 18. One end of the connecting strip 20 is connected to the proximal end of the traction wire 9 in the connecting hole 16, and the other end of the connecting strip 20 is connected to the control block 11. A sealing block 21 for sealing the end of the inner catheter 2 is provided at the distal end. A first sealing hole is provided on the sealing block 21 for allowing the traction wire 9 to pass through. By moving the control block 11 on the first control handle 10 along the sliding groove 17, the traction wire 9 is driven to bring the tip of the triangular block 6 together or separate, thus enabling rapid control of the distal end of the inner catheter 2 for bending. By providing the sealing block 21 and the first sealing hole, it is possible to prevent the traction wire 9 from communicating with the outside of the blood vessel during movement, thus avoiding bleeding.

[0027] The upper side of the control block 11 is recessed with a pressing groove 22. An upper pressing block 23 is movably disposed inside the pressing groove 22. An elastic groove 24 is provided at the bottom of the pressing groove 22. A lower pressing block 25 is movably disposed inside the elastic groove 24. The lower end of the lower pressing block 25 is connected to the bottom of the elastic groove 24 through a spring 26, and the upper end is connected to the upper pressing block 23. The wall of the sliding groove 17 is recessed along its length with a positioning groove 27. A first friction layer is provided on the upper wall of the positioning groove 27. The side wall of the control block 11 is provided with a connecting hole 28 at the position corresponding to the positioning groove 27, which is connected to the pressing groove 22. A card 29 is movably disposed inside the connecting hole 28. One end of the card 29 is placed inside the positioning groove 27, and a second friction layer 30 is provided on its upper side. The other end of the card 29 is connected to the upper pressing block 23. This configuration, when no adjustment is needed or after adjustment is complete, prevents the control block 11 from moving within the sliding groove 17 by having the spring 26 press against the lower pressure block 25, causing the lower pressure block 25 to bring the second friction layer 30 on the upper side of the card 29 into contact with the first friction layer of the positioning groove 27. When movement is required, pressing the upper pressure block 23 compresses the spring 26, separating the first and second friction layers 30, thus easily moving the control block 11 within the sliding groove 17 and adjusting the curvature of the distal end of the inner guide tube 2.

[0028] It also includes a first guidewire 31, the proximal end of which is connected to a third control handle 32. The distal end of the first guidewire 31 enters the inner catheter 2 through the connection hole 16. An expandable capture net 33 is provided at the distal end of the first guidewire 31. After the first guidewire 31 drives the converged capture net 33 through the thrombus, the capture net 33 expands and then moves towards the collection net 3 to push the thrombus into the collection net 3.

[0029] It also includes a second guidewire 34, with a fourth control handle 35 connected to the proximal end of the second guidewire 34 and a stripper 36 provided at the distal end of the second guidewire 34. For some large or highly coagulated thrombi, in order to avoid blocking the collection net 3 and preventing the collection net 3 from properly gathering and returning to the external catheter 1, the second guidewire 34 and the stripper 36 are used to strip the thrombus into smaller pieces or several parts, so that the thrombus can enter the collection net 3 and smoothly enter the external catheter 1.

[0030] The sealing block 21 is provided with a second sealing hole that allows the first guide wire 31 to pass through and a third sealing hole that allows the second guide wire 34 to pass through. By providing the first sealing hole and the second sealing hole, the smooth movement of the first guide wire 31 and the second guide wire 34 can be ensured while also providing a sealing function.

[0031] The dissecting member 36 includes an arc-shaped bony rod 37. One side of the bony rod 37 has an opening and closing groove 38 along its length. Dissecting tabs 39 are provided on opposite sides of the opening and closing groove 38. The bony rod 37 is made of an elastic material. This design allows the dissecting tabs 39 to close together via the opening and closing groove 38. When the dissecting member 36 is guided into the thrombus by the second guidewire 34, the thrombus compresses the two dissecting tabs 39, facilitating entry into the thrombus. When the dissecting member 36 is pulled out of the thrombus, the two dissecting tabs 39 will trap a portion of the thrombus, and as the pulling process continues, the two dissecting tabs 39 will gradually separate, thus dissecting part of the thrombus.

[0032] The first guide wire 31 has a control through hole 40 extending through both ends. A third guide wire 41 is movably disposed within the control through hole 40. The proximal end of the third guide wire 41 is placed within a fourth control handle 35. The fourth control handle 35 is equipped with a toggle block that drives the third guide wire 41 to move. The capture net 33 is disposed at the distal end of the third guide wire 41. When controlling the capture net 33, placing the capture net 33 within the control through hole 40 allows the capture net 33 to be in a contracted state. When the third guide wire 41 is pushed to move the capture net 33 out of the control through hole 40, the capture net 33 will automatically expand.

[0033] The inner catheter 2 is connected to a negative pressure suction device 43 via a suction tube 42.

[0034] Although the invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter arrangement within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. A multifunctional thrombus aspiration device, characterized in that, The device includes an outer conduit (1) and an inner conduit (2) movably disposed within the outer conduit (1). The distal end of the inner conduit (2) is fitted with an expandable, funnel-shaped collecting net (3). The inner wall of the inner conduit (2) near the collecting net (3) is provided with fixed blocks (4) and traction blocks (5) spaced apart along its length. Between the fixed blocks (4) and traction blocks (5), a plurality of triangular blocks (6) are arranged sequentially along the length of the inner conduit (2). Near the apex of each triangular block (6), a through-hole is provided along the length of the inner conduit (2). The first sliding hole (7) on the side, the fixed block (4) is provided with a second sliding hole (8) aligned with the first sliding hole (7), the inner tube (2) is provided with a traction wire (9), the traction wire (9) passes through the second sliding hole (8) and all the first sliding holes (7) in sequence and is fixedly connected to the traction block (5); the inner tube (2) is provided with a first control handle (10) at a position away from the collection net (3), the first control handle (10) is provided with a control block (11) for controlling the movement of the traction wire (9) in the inner tube (2).

2. The multifunctional thrombus aspiration device according to claim 1, characterized in that: The first control handle (10) is provided with a connecting hole (16) that passes through both ends. The proximal end of the inner conduit (2) is installed in the connecting hole (16). A sliding groove (17) is provided on the upper side of the first control handle (10) along the length direction of the connecting hole (16). The bottom of the sliding groove (17) is connected to the connecting hole (16) through a strip hole (18). A control block (11) is slidably provided in the sliding groove (17). A connecting strip (20) is provided in the strip hole (18). One end of the connecting strip (20) is connected to the proximal end of the traction wire (9) in the connecting hole (16). The other end of the connecting strip (20) is connected to the control block (11). A sealing block (21) for sealing the end of the inner conduit (2) is provided at the distal end of the inner conduit (2). A first sealing hole for allowing the traction wire (9) to pass through is provided on the sealing block (21).

3. The multifunctional thrombus aspiration device according to claim 2, characterized in that: The upper side of the control block (11) is recessed with a pressing groove (22). An upper pressing block (23) is movable up and down inside the pressing groove (22). An elastic groove (24) is provided at the bottom of the pressing groove (22). A lower pressing block (25) is movable up and down inside the elastic groove (24). The lower end of the lower pressing block (25) is connected to the bottom of the elastic groove (24) via a spring (26), and its upper end is connected to the upper pressing block (23). The sliding groove (17) has a recessed groove wall along its length. The positioning groove (27) has a first friction layer on its upper wall. The control block (11) has a connecting hole (28) on its side wall at the position corresponding to the positioning groove (27) that communicates with the pressing groove (22). A card (29) is movably disposed in the connecting hole (28). One end of the card (29) is placed in the positioning groove (27) and a second friction layer (30) is disposed on its upper side. The other end of the card (29) is connected to the upper pressing block (23).

4. The multifunctional thrombus aspiration device according to claim 2, characterized in that: It also includes a first guidewire (31), the proximal end of which is connected to a third control handle (32), the distal end of which enters the inner catheter (2) through the connection hole (16), and the distal end of which is provided with an expandable capture net (33).

5. A multifunctional thrombus aspiration device according to claim 4, characterized in that: It also includes a second guidewire (34), the proximal end of which is connected to a fourth control handle (35), and the distal end of which is provided with a stripper (36).

6. A multifunctional thrombus aspiration device according to claim 5, characterized in that: The sealing block (21) is provided with a second sealing hole that allows the first guide wire (31) to pass through and a third sealing hole that allows the second guide wire (34) to pass through.

7. A multifunctional thrombus aspiration device according to claim 5, characterized in that: The peeling member (36) includes an arc-shaped bone rod (37), one side of which is provided with an opening and closing groove (38) along the length direction, and peeling pieces (39) are provided on both sides of the opening and closing groove (38) of the bone rod (37), and the bone rod (37) is made of an elastic material.

8. A multifunctional thrombus aspiration device according to claim 5, characterized in that: The first guide wire (31) is provided with a control through hole (40) that passes through both ends. A third guide wire (41) is movably disposed in the control through hole (40). The proximal end of the third guide wire (41) is placed in the fourth control handle (35). The fourth control handle (35) is provided with a toggle block that drives the third guide wire (41) to move. The capture net (33) is disposed at the distal end of the third guide wire (41).

9. A multifunctional thrombus aspiration device according to claim 1, characterized in that: The inner catheter (2) is connected to a negative pressure suction device (43) via a suction tube (42).

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