Catheter device for taking out blood vessel thrombus

Abstract

The invention relates to the technical field of medical instruments, in particular to a catheter device for taking out blood vessel thrombus, which comprises a connector and a suction catheter body, one end of the suction catheter body is connected with a suction port of the connector, and a liquid suction pipe orifice communicated with an inner cavity is fixedly mounted on the side surface of the connector. A guide wire is inserted into the inner side of the suction catheter body in a penetrating mode and penetrates through an inner cavity of the connector. The thrombus aspiration catheter has the advantages that the aspiration catheter body is slowly inserted into a blood vessel, the aspiration opening of the aspiration catheter body is moved to the thrombus, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, and the thrombus can be aspirated. The guide wire is driven by the adjusting mechanism to extend forwards along the inner cavity of the suction catheter body, the guide wire firstly drives the telescopic mechanism to slide forwards, and the guide wire continues to move close to the suction opening of the suction catheter body.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a catheter device for removing vascular thrombus. Background Art

[0002] Thrombi, also known as blood clots, can attach to blood vessel walls and prevent blood from flowing through healthy vessels. Removing thrombi from blood vessels and reopening the blocked vessels is key to restoring blood vessels blocked by thrombi.

[0003] Currently, aspiration catheters are primarily used to clear thrombus obstruction and other issues. However, a potential risk with conventional aspiration catheters is high-viscosity thrombus obstruction. This thrombus obstruction can occur at the proximal aspiration opening of conventional aspiration catheters or in the delivery section of the catheter where the thrombus is transported. When large or bulky thrombi are drawn into the aspiration catheter by negative pressure, they can clog the aspiration opening or the delivery lumen, preventing further aspiration of thrombi into the catheter.

[0004] In order to solve the problem of blockage, an inner tube or guide wire is set in the suction catheter in the prior art, and the thrombus is removed through the inner tube or guide wire. However, the existing inner tube or guide wire is poor in the effect of thrombus removal and cannot solve the problem of thrombus blockage well. In addition, when the suction catheter moves, the inner tube or guide wire set inside it is likely to cause damage to the blood vessel wall, which is not conducive to practical use. Summary of the Invention

[0005] The object of the present invention is to provide a catheter device for removing vascular thrombus to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a catheter device for removing vascular thrombus, comprising a connector and an aspiration catheter body, one end of the aspiration catheter body being connected to the aspiration port of the connector, a side of the connector being fixedly mounted with a liquid extraction nozzle communicating with an inner lumen, a guide wire being inserted through the inner side of the aspiration catheter body, and the guide wire being inserted through the inner lumen of the connector; A protective shell is fixedly installed at the end of the connector away from the suction catheter body, one end of the guide wire extends to the inner cavity of the protective shell, an adjustment mechanism for guide wire extension and retraction is installed in the protective shell, and a rotating mechanism for driving the guide wire to rotate is installed in the inner cavity of the protective shell. A limiting sleeve is installed in the inner cavity of the suction catheter body away from the connector, and the side of the limiting sleeve is fixedly connected to a support block in an annular array, one end of the support block is fixedly connected to the inner cavity of the suction catheter body, and a telescopic mechanism is slidably installed on the inner side of the limiting sleeve, and a cutting mechanism for cutting off the thrombus is symmetrically installed in the telescopic mechanism, and one end of the two cutting mechanisms is fixedly connected to one end of the guide wire.

[0007] As a further solution of the present invention, a reinforcement strip is fixedly installed in the inner cavity of the suction catheter body, a fluid delivery cavity is opened on the inner side of the reinforcement strip, and a fluid outlet is opened at one end of the fluid delivery cavity close to the suction opening of the suction catheter body.

[0008] As a further solution of the present invention, a T-shaped slot is provided at the upper end of the protective shell, and slots are provided equidistantly on the left and right sides of the T-shaped slot. A concave seat is fixedly connected to the bottom of the inner cavity of the protective shell, and a circular slot is provided through the side of the concave seat close to the guide wire. The adjusting mechanism includes an adjusting column rotatably mounted in a circular groove, both ends of the adjusting column extending to the outside of the circular groove, one end of the adjusting column connected to the guide wire, an end of the adjusting column away from the guide wire having a polygonal groove, the rotating mechanism connected to the polygonal groove, an end of the adjusting column close to the guide wire fixedly sleeved with an annular plate, an outer side of the annular plate having an annular groove; A T-shaped adjustment seat is movably installed in the T-shaped groove, a push plate is fixedly installed at the lower end of the T-shaped adjustment seat, a U-shaped groove is opened at the lower end of the push plate, the U-shaped groove is clamped with the annular groove, and positioning components are symmetrically installed on the left and right ends of the T-shaped adjustment seat.

[0009] As a further solution of the present invention, the T-shaped adjustment seat is connected to the T-shaped slot in a front-rear sliding manner, the lower end of the T-shaped adjustment seat and the upper end of the protective shell cavity are in the same horizontal plane, and the upper end of the push plate is in sliding contact with the upper end of the protective shell cavity.

[0010] As a further solution of the present invention, the left and right ends of the T-shaped adjustment seat are symmetrically provided with contraction grooves, and convex spring pieces are installed in the two contraction grooves. The raised parts of the convex spring pieces pass through the contraction grooves and are engaged with the card slots.

[0011] As a further solution of the present invention, the rotating mechanism includes a polygonal column movably inserted in the polygonal groove, and the end of the polygonal column away from the adjusting column is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the concave seat. One end of the rotating shaft passes through the concave seat and is fixedly sleeved with a synchronous bevel gear. The upper end of the side of the synchronous bevel gear is engaged with a transmission bevel gear, and the upper end of the transmission bevel gear is fixedly connected to a round rod, and the upper end of the round rod passes through the top of the protective shell upward and is fixedly sleeved with a crank.

[0012] As a further solution of the present invention, the telescopic mechanism includes an adjusting pipe installed through the inner cavity of the limiting sleeve, and both ends of the adjusting pipe are fixedly sleeved with limiting rings. The inner cavity side wall of the adjusting pipe is provided with multiple sliding grooves in a circular array, and one end of the guide wire is movably inserted into the inner cavity of the adjusting pipe. The end of the guide wire in the inner cavity of the adjusting pipe is fixedly connected with multiple slides in a circular array, and each slide is respectively connected to the adjacent slide groove for sliding back and forth. A guide assembly is symmetrically installed at one end of the adjusting pipe close to the suction opening of the suction catheter body, and the two cutting mechanisms are respectively installed in the two guide assemblies.

[0013] As a further solution of the present invention, the guide wire is slidably connected to the inner cavity side wall of the regulating pipe, and the regulating pipe is slidably connected to the limiting sleeve back and forth.

[0014] As a further solution of the present invention, the guide assembly includes a guide tube symmetrically fixedly installed at one end of the inner cavity of the adjusting pipe, a guide groove is opened on the inner side of the guide tube, a storage groove is opened at the end of the guide groove away from the adjusting pipe, and the cutting mechanism is installed in the guide groove.

[0015] As a further solution of the present invention, the cutting mechanism includes a cutting rod slidably installed in the guide groove, one end of the cutting rod is fixedly connected to the guide wire, and a cutting head is fixedly installed on the end of the cutting rod away from the guide wire.

[0016] The beneficial effects of the present invention are: 1. Slowly insert the suction catheter body into the blood vessel, move the suction opening of the suction catheter body to the thrombus, and drive the guide wire to extend forward along the inner cavity of the suction catheter body through the adjustment mechanism. The guide wire first drives the telescopic mechanism to slide forward, and the guide wire continues to move closer to the suction opening of the suction catheter body. At this time, the guide wire drives the cutting rod to slide outward along the guide groove. The cutting rod bends outward along the guide groove and extends so that the cutting rod and cutting head extend into the thrombus. When one end of the guide wire contacts the guide tube, the guide wire cannot move further. At this time, stop pushing the T-shaped adjustment seat.

[0017] 2. The guide wire is driven to rotate by the rotating mechanism, and the guide wire drives the resection mechanism to rotate. The thrombus is cut into pieces by rotating the cutting rod and the cutting head to prevent the thrombus from blocking the suction opening or the inner cavity of the suction catheter body. The flushing fluid is injected into the fluid delivery cavity through the fluid injection tube. The flushing fluid flows along the fluid delivery cavity and finally flows into the inner cavity of the suction catheter body along the fluid outlet. At the same time, suction is drawn through the liquid extraction tube port to suck the cut thrombus into the inner cavity of the suction catheter body, so that the cut thrombus and fluid flow backward along the inner cavity of the suction catheter body. When the thrombus is cleared, the adjustment mechanism, guide wire, telescopic mechanism, guide assembly and resection mechanism are reset, and then the suction catheter body is removed from the blood vessel.

[0018] 3. When the suction catheter body moves along the blood vessel, the guide assembly and the cutting mechanism are both retracted in the inner cavity of the suction catheter body. At this time, the guide assembly and the cutting mechanism will not cause damage to the blood vessel wall. When the thrombus is cut into pieces, the cutting mechanism is extended, and the thrombus can be cut into pieces well by the set cutting mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a perspective view of the structure of the catheter device for removing vascular thrombus according to the present invention; Figure 2 This is a cross-sectional view of the structure of the catheter device for removing vascular thrombus according to the present invention; Figure 3 This is a cross-sectional view of the protective housing and adjustment mechanism structure of the present invention; Figure 4 This is an exploded view of the connector, protective housing, adjustment mechanism and rotating mechanism of the present invention; Figure 5 This is a cross-sectional view of the suction catheter body and the reinforcement strip structure of the present invention; Figure 6 This is a cross-sectional view of the suction catheter body, reinforcement strip, telescopic mechanism and guide assembly structure of the present invention; Figure 7 This is a schematic diagram of the structure of the cutting mechanism of the present invention being retracted into the guide assembly; Figure 8 An exploded view of the suction catheter body, telescopic mechanism, guide assembly, and resection mechanism of the present invention; Figure 9 This is a schematic diagram of the structure of the aspiration catheter body of the present invention when it is close to the thrombus and the resection mechanism is retracted into the guide assembly; Figure 10 This is a schematic structural diagram of the present invention when the suction catheter body is close to the thrombus and the cutting mechanism is extended outside the guide assembly.

[0020] In the figure: 1. connector; 11. suction tube outlet; 2. suction catheter body; 21. guide wire; 22. reinforcement strip; 23. fluid delivery chamber; 24. fluid outlet; 25. slide plate; 3. protective shell; 31. T-shaped slot; 32. card slot; 33. concave seat; 34. circular slot; 4. adjusting column; 41. polygonal slot; 42. annular plate; 43. annular slot; 44. polygonal column; 45. rotating shaft; 46. synchronous bevel gear; 47. transmission bevel gear; 48. round rod; 49. crank; 5. T-shaped adjusting seat; 51. contraction slot; 52. convex spring piece; 53. push plate; 54. U-shaped slot; 6. limiting sleeve; 61. support block; 62. adjusting pipe; 63. limiting ring; 64. slide groove; 65. guide tube; 66. guide groove; 67. storage tank; 7. cutting rod; 71. cutting head; 8. thrombus. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figures 1 to 10 The present invention provides a technical solution: a catheter device for removing vascular thrombus, comprising a connector 1 and a suction catheter body 2, one end of the suction catheter body 2 being connected to the suction port of the connector 1, a liquid extraction nozzle 11 communicating with the inner cavity being fixedly mounted on the side of the connector 1, a guide wire 21 being inserted through the inner side of the suction catheter body 2, and the guide wire 21 passing through the inner cavity of the connector 1; A protective shell 3 is fixedly installed at the end of the connector 1 away from the suction catheter body 2. The protective shell 3 is a hand-held shell. One end of the guide wire 21 extends to the inner cavity of the protective shell 3. An adjustment mechanism for the extension and retraction of the guide wire 21 is installed in the protective shell 3. The inner cavity of the protective shell 3 is installed with a rotating mechanism for driving the guide wire 21 to rotate. A limiting sleeve 6 is installed in the inner cavity of the suction catheter body 2 away from the connector 1. The side of the limiting sleeve 6 is fixedly connected to a support block 61 in an annular array. One end of the support block 61 is fixedly connected to the inner cavity of the suction catheter body 2. A telescopic mechanism is slidably installed on the inner side of the limiting sleeve 6. A cutting mechanism for cutting off the thrombus 8 is symmetrically installed in the telescopic mechanism. One end of the two cutting mechanisms is fixedly connected to one end of the guide wire 21.

[0023] In order to ensure that the guide wire 21 can be stably extended and retracted, a plurality of guide sleeves are equidistantly arranged in the inner cavity of the suction catheter body 2. The guide sleeves are sleeved on the guide wire 21 to guide and transmit the guide wire 21 so that the guide wire 21 can be stably extended and retracted along the suction catheter body 2. The guide sleeves are fixedly connected to the inner cavity side wall of the suction catheter body 2 through a connecting block.

[0024] The suction opening of the suction catheter body 2 is located at an ultra-soft end. The ultra-soft end prevents the suction catheter body 2 from causing damage to the blood vessel wall when it moves along the blood vessel.

[0025] See also Figure 6 A reinforcing strip 22 is fixedly installed in the inner cavity of the suction catheter body 2, and a fluid delivery cavity 23 is opened on the inner side of the reinforcing strip 22. A fluid outlet 24 is opened at one end of the fluid delivery cavity 23 close to the suction opening of the suction catheter body 2.

[0026] A fluid injection tube is fixedly installed at one end of the fluid delivery cavity 23 away from the fluid outlet 24. An air cavity can be opened in the reinforcing strip 22 as needed. A sealing bag is sleeved on the outside of the suction catheter body 2, and the air bag is connected to the sealing bag.

[0027] See also Figure 1 、 Figure 2 and Figure 4 A T-shaped slot 31 is provided on the upper end of the protective shell 3, and slots 32 are equidistantly provided on the left and right sides of the T-shaped slot 31. A concave seat 33 is fixedly connected to the bottom of the inner cavity of the protective shell 3, and a circular slot 34 is provided through the side of the concave seat 33 close to the guide wire 21; The adjusting mechanism includes an adjusting column 4 rotatably mounted in a circular groove 34, both ends of the adjusting column 4 extend to the outside of the circular groove 34, one end of the adjusting column 4 is connected to the guide wire 21, one end of the adjusting column 4 is provided with a docking groove, the guide wire 21 is inserted into the inner side of the docking groove, and then the docking groove is locked by a bolt and a nut, so that the adjusting column 4 and the guide wire 21 are relatively fixed, the end of the adjusting column 4 away from the guide wire 21 is provided with a polygonal groove 41, the rotating mechanism is connected to the polygonal groove 41, the end of the adjusting column 4 close to the guide wire 21 is fixedly sleeved with an annular plate 42, and the outer side of the annular plate 42 is provided with an annular groove 43; A T-shaped adjustment seat 5 is movably installed in the T-shaped groove 31, and a push plate 53 is fixedly installed at the lower end of the T-shaped adjustment seat 5. A U-shaped groove 54 is opened at the lower end of the push plate 53, and the U-shaped groove 54 is engaged with the annular groove 43. Positioning components are symmetrically installed on the left and right ends of the T-shaped adjustment seat 5.

[0028] The T-shaped adjustment seat 5 is connected to the T-shaped slot 31 for forward and backward sliding. The lower end of the T-shaped adjustment seat 5 is in the same horizontal plane as the upper end of the inner cavity of the protective shell 3. The upper end of the push plate 53 is in sliding contact with the upper end of the inner cavity of the protective shell 3.

[0029] The T-shaped adjusting seat 5 cooperates with the push plate 53 , so that the T-shaped adjusting seat 5 can stably slide back and forth along the T-shaped slot 31 , preventing the T-shaped adjusting seat 5 from separating from the T-shaped slot 31 .

[0030] See also Figures 2 to 4 The left and right ends of the T-shaped adjustment seat 5 are symmetrically provided with contraction grooves 51 , and convex spring pieces 52 are installed in the two contraction grooves 51 . The raised portion of the convex spring piece 52 passes through the contraction groove 51 and is engaged with the card slot 32 .

[0031] A recessed groove is provided at the upper end of the T-shaped adjustment seat 5 for placing fingers. The fingers push the T-shaped adjustment seat 5 to slide along the T-shaped groove 31, and the T-shaped adjustment seat 5 drives the push plate 53 to move synchronously, and the push plate 53 drives the annular plate 42 to move synchronously. By moving the T-shaped adjustment seat 5 back and forth, the annular plate 42 drives the adjusting column 4 to move back and forth synchronously, and the adjusting column 4 drives the guide wire 21 to move back and forth along the inner cavity of the suction catheter body 2.

[0032] When the T-shaped adjustment seat 5 moves, the convex spring piece 52 moves synchronously. When the two ends of the T-shaped adjustment seat 5 move to align with the card slot 32, the raised portion of the convex spring piece 52 engages with the card slot 32, thereby positioning the T-shaped adjustment seat 5, and then positioning the push plate 53, the annular plate 42 and the adjustment column 4. The adjustment column 4 and the guide wire 21 are relatively fixed. When the adjustment column 4 is locked, the guide wire 21 is also locked synchronously. When the guide wire 21 is released, it can move freely. When the T-shaped adjustment seat 5 drives the convex spring piece 52 away from the card slot 32, the raised portion of the convex spring piece 52 abuts against the inner side wall of the T-shaped slot 31, so that the raised portion of the convex spring piece 52 shrinks into the shrinkage slot 51 until the two ends of the T-shaped adjustment seat 5 move to align with the card slot 32, so that the raised portion of the convex spring piece 52 is engaged with the card slot 32.

[0033] See also Figure 1 、 Figure 2 and Figure 4 The rotating mechanism includes a polygonal column 44 movably inserted in the polygonal groove 41. The end of the polygonal column 44 away from the adjusting column 4 is fixedly connected to a rotating shaft 45. The rotating shaft 45 is rotatably connected to the concave seat 33. One end of the rotating shaft 45 passes through the concave seat 33 and is fixedly sleeved with a synchronous bevel gear 46. The upper end of the side of the synchronous bevel gear 46 is engaged with a transmission bevel gear 47. The upper end of the transmission bevel gear 47 is fixedly connected to a round rod 48. The upper end of the round rod 48 penetrates the top of the protective shell 3 upward and is fixedly sleeved with a crank 49. The round rod 48 is rotatably connected to the protective shell 3. The crank 49 and the transmission bevel gear 47 are respectively rotatably connected to the inner and outer sides of the top of the protective shell 3, so that the crank 49 drives the transmission bevel gear 47 to rotate stably through the round rod 48.

[0034] When the guide wire 21 is required to drive the resection mechanism to rotate, the crank 49 is rotated, and the crank 49 drives the transmission bevel gear 47 to rotate through the round rod 48, and the transmission bevel gear 47 drives the synchronous bevel gear 46 to rotate, and the synchronous bevel gear 46 drives the polygonal column 44 to rotate through the rotating shaft 45, and the polygonal column 44 drives the adjustment column 4 to rotate along the circular groove 34. When the adjustment column 4 rotates, the annular plate 42 is driven to rotate synchronously, and the annular groove 43 of the annular plate 42 rotates along the U-shaped groove 54, so that the push plate 53 is always engaged with the annular plate 42; When the adjusting column 4 rotates, the guide wire 21 is driven to rotate synchronously, and the guide wire 21 drives the cutting mechanism to rotate, so that the cutting mechanism cuts the thrombus 8 and prevents the thrombus 8 from blocking the suction opening or inner cavity of the suction catheter body 2.

[0035] See also Figures 5 to 10The telescopic mechanism includes an adjusting pipe 62 installed through the inner cavity of the limiting sleeve 6, and both ends of the adjusting pipe 62 are fixedly sleeved with limiting rings 63. The inner cavity side wall of the adjusting pipe 62 is provided with a plurality of slides 64 in a circular array. One end of the guide wire 21 is movably inserted into the inner cavity of the adjusting pipe 62, and the end of the guide wire 21 in the inner cavity of the adjusting pipe 62 is fixedly connected with a plurality of slides 25 in a circular array. Each slide 25 is respectively connected to the adjacent slide 64 for sliding back and forth. The end of the adjusting pipe 62 close to the suction opening of the suction catheter body 2 is symmetrically installed with a guide assembly, and the two cutting mechanisms are respectively installed in the two guide assemblies.

[0036] In the initial state, the two guide components are in the inner cavity of the suction catheter body 2, and the resection mechanism is in the guide component. At this time, the slide 25 is at the rear end of the slide groove 64, the end of the slide groove 64 close to the guide component is the front end, and the end of the slide groove 64 away from the guide component is the rear end.

[0037] The guide wire 21 is slidably connected to the inner cavity side wall of the regulating pipe 62, and the regulating pipe 62 is slidably connected to the limiting sleeve 6 in a front-to-rear manner.

[0038] See also Figures 6 to 8 The guide assembly includes a guide tube 65 symmetrically fixedly installed at one end of the inner cavity of the regulating pipe 62. A guide groove 66 is provided on the inner side of the guide tube 65. The guide groove 66 is a curved groove. The curved ends of the two guide grooves 66 are distributed in an eight-shaped shape. A storage groove 67 is provided at the end of the guide groove 66 away from the regulating pipe 62, and the cutting mechanism is installed in the guide groove 66.

[0039] The cutting mechanism includes a cutting rod 7 slidably mounted in the guide groove 66 , one end of the cutting rod 7 is fixedly connected to the guide wire 21 , and a cutting head 71 is fixedly mounted on the end of the cutting rod 7 away from the guide wire 21 .

[0040] In the initial state, one end of the cutting rod 7 moves to the inner cavity of the regulating pipe 62 , and the cutting rod 7 shrinks into the guide groove 66 , while the cutting head 71 shrinks into the storage groove 67 .

[0041] Push the T-shaped adjustment seat 5 forward along the T-shaped slot 31, so that one end of the guide wire 21 moves close to the suction opening of the suction catheter body 2. The guide wire 21 drives the adjustment pipe 62 to slide forward along the limiting sleeve 6. When the limiting ring 63 at the rear end of the adjustment pipe 62 contacts the limiting sleeve 6, the adjustment pipe 62 cannot slide further forward along the limiting sleeve 6. The guide wire 21 continues to move closer to the suction opening of the suction catheter body 2. At this time, one end of the guide wire 21 moves along the inner cavity of the adjusting pipe 62 close to the guide tube 65, and the guide wire 21 drives the slide 25 to slide along the slide groove 64. When the slide 25 slides from the rear end of the slide groove 64 to the front end, the guide wire 21 drives the adjusting pipe 62 to move close to the suction opening of the suction catheter body 2 through the slide groove 25. At the same time, the guide wire 21 drives the cutting rod 7 to slide outward along the guide groove 66, and the cutting rod 7 drives the cutting head 71 to move out of the storage groove 67. At this time, the cutting rod 7 bends outward along the guide groove 66. When one end of the guide wire 21 contacts the guide tube 65, the slide 25 slides to the front end of the slide groove 64, thereby preventing the guide wire 21 from continuing to move, and then stops pushing the T-shaped adjusting seat 5.

[0042] Working principle: During operation, the suction catheter body 2 is slowly inserted into the blood vessel, and the suction opening of the suction catheter body 2 is moved to the thrombus 8. At this time, the T-shaped adjustment seat 5 is pushed forward along the T-shaped groove 31, and the push plate 53 drives the annular plate 42 to move forward synchronously. The annular plate 42 drives the adjustment column 4 to move forward, and the polygonal groove 41 of the adjustment column 4 slides along the polygonal column 44. The adjustment column 4 drives the guide wire 21 to extend forward along the inner cavity of the suction catheter body 2; The guide wire 21 first drives the adjusting pipe 62 to slide forward along the limiting sleeve 6. When the limiting ring 63 at the rear end of the adjusting pipe 62 contacts the limiting sleeve 6, the adjusting pipe 62 cannot continue to slide forward along the limiting sleeve 6. The guide wire 21 continues to move closer to the suction opening of the suction catheter body 2. At this time, the guide wire 21 drives the slide plate 25 to slide forward along the slide groove 64. At the same time, the guide wire 21 drives the cutting rod 7 to slide outward along the guide groove 66. The cutting rod 7 bends outward along the guide groove 66, so that the cutting rod 7 and the cutting head 71 extend into the thrombus 8. When one end of the guide wire 21 contacts the guide tube 65, the guide wire 21 cannot continue to move, and the pushing of the T-shaped adjusting seat 5 is stopped at this time.

[0043] By rotating the crank 49, the round rod 48 drives the transmission bevel gear 47 to rotate, and the transmission bevel gear 47 drives the synchronous bevel gear 46 to rotate. The synchronous bevel gear 46 drives the polygonal column 44 to rotate through the rotating shaft 45. The polygonal column 44 drives the guide wire 21 to rotate synchronously through the adjusting column 4. The guide wire 21 drives the resection mechanism to rotate. The thrombus 8 is cut into pieces by the rotation of the cutting rod 7 and the cutting head 71 to prevent the thrombus 8 from blocking the suction opening or the inner cavity of the suction catheter body 2.

[0044] A flushing fluid is injected into the fluid delivery lumen 23 through the fluid injection tube. The flushing fluid flows along the fluid delivery lumen 23 and finally flows into the inner cavity of the aspiration catheter body 2 through the fluid outlet 24. At the same time, suction is applied through the aspiration tube port 11 to draw the chopped thrombus 8 into the inner cavity of the aspiration catheter body 2, causing the chopped thrombus 8 and the fluid to flow backward along the inner cavity of the aspiration catheter body 2. When the thrombus 8 is cleared, the T-shaped adjustment seat 5 is first pushed backward along the T-shaped groove 31 to reset the adjustment mechanism. The adjustment mechanism drives the guide wire 21 to move backward along the inner cavity of the suction catheter body 2, and the guide wire 21 drives the telescopic mechanism, the guide assembly and the resection mechanism to reset, so that the resection mechanism is retracted into the guide assembly.

[0045] At this time, if there is no other thrombus 8 that needs to be removed, the suction catheter body 2 can be slowly moved out of the blood vessel to complete the operation; when the thrombus 8 in other positions needs to be removed, the suction opening of the suction catheter body 2 is moved to the position of the thrombus 8. If the thrombus 8 is not coagulated and will not cause obstruction of the inner cavity of the suction catheter body 2, there is no need to extend the resection mechanism, and the thrombus 8 can be directly suctioned and removed. If the thrombus 8 has a high viscosity and causes obstruction, the T-shaped adjustment seat 5 is pushed forward along the T-shaped groove 31, and the above operation is repeated to complete the chopping of the thrombus 8, and then the chopped thrombus 8 is suctioned and cleaned. After the cleaning is completed, the adjustment mechanism, guide wire 21, telescopic mechanism, guide assembly and resection mechanism are reset, and then the suction catheter body 2 is removed from the blood vessel.

[0046] The provided cutting mechanism can effectively cut up the thrombus 8. Initially, when the suction catheter body 2 moves along the blood vessel, the guide component and the cutting mechanism are both retracted in the inner cavity of the suction catheter body 2. At this time, the guide component and the cutting mechanism will not cause damage to the blood vessel wall.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A catheter device for removing vascular thrombus, comprising a connector (1) and a suction catheter body (2), one end of the suction catheter body (2) being connected to the suction port of the connector (1), a liquid extraction tube port (11) being fixedly mounted on the side of the connector (1) and communicating with the inner cavity, a guide wire (21) being inserted through the inner side of the suction catheter body (2), and the guide wire (21) passing through the inner cavity of the connector (1); Its characteristics are: The connector (1) is fixedly mounted with a protective shell (3) at one end away from the suction catheter body (2), one end of the guide wire (21) extends to the inner cavity of the protective shell (3), an adjustment mechanism for extending and retracting the guide wire (21) is installed in the protective shell (3), and a rotating mechanism for driving the guide wire (21) to rotate is installed in the inner cavity of the protective shell (3), and a limiting sleeve (6) is installed in the inner cavity of the suction catheter body (2) away from the connector (1), and the side of the limiting sleeve (6) is fixedly connected to a support block (61) in an annular array, one end of the support block (61) is fixedly connected to the inner cavity of the suction catheter body (2), and a telescopic mechanism is slidably mounted on the inner side of the limiting sleeve (6), and a cutting mechanism for cutting off the thrombus (8) is symmetrically installed in the telescopic mechanism, and one end of each of the two cutting mechanisms is fixedly connected to one end of the guide wire (21).

2. The catheter device for removing vascular thrombus according to claim 1, characterized in that: A reinforcing strip (22) is fixedly mounted on the inner cavity of the suction catheter body (2), a fluid delivery cavity (23) is provided on the inner side of the reinforcing strip (22), and a fluid outlet (24) is provided at one end of the fluid delivery cavity (23) close to the suction opening of the suction catheter body (2).

3. The catheter device for removing vascular thrombus according to claim 1, characterized in that: The upper end of the protective shell (3) is provided with a T-shaped groove (31), and the left and right sides of the T-shaped groove (31) are equidistantly provided with slots (32). The bottom of the inner cavity of the protective shell (3) is fixedly connected with a concave seat (33), and a circular groove (34) is provided through the side of the concave seat (33) close to the guide wire (21); The adjusting mechanism includes an adjusting column (4) rotatably mounted in a circular groove (34), both ends of the adjusting column (4) extend to the outside of the circular groove (34), one end of the adjusting column (4) is connected to the guide wire (21), and an end of the adjusting column (4) away from the guide wire (21) is provided with a polygonal groove (41), the rotating mechanism is connected to the polygonal groove (41), and an end of the adjusting column (4) close to the guide wire (21) is fixedly sleeved with an annular plate (42), and an annular groove (43) is provided on the outer side of the annular plate (42); A T-shaped adjustment seat (5) is movably mounted in the T-shaped groove (31), a push plate (53) is fixedly mounted at the lower end of the T-shaped adjustment seat (5), a U-shaped groove (54) is formed at the lower end of the push plate (53), the U-shaped groove (54) is engaged with the annular groove (43), and positioning components are symmetrically mounted on the left and right ends of the T-shaped adjustment seat (5).

4. The catheter device for removing vascular thrombus according to claim 3, characterized in that: The T-shaped adjustment seat (5) is connected to the T-shaped groove (31) in a forward and backward sliding manner. The lower end of the T-shaped adjustment seat (5) and the upper end of the inner cavity of the protective shell (3) are in the same horizontal plane, and the upper end of the push plate (53) is in sliding contact with the upper end of the inner cavity of the protective shell (3).

5. The catheter device for removing vascular thrombus according to claim 3, characterized in that: The T-shaped adjustment seat (5) has contraction grooves (51) symmetrically formed at both left and right ends. Convex spring pieces (52) are installed in the two contraction grooves (51). The raised portions of the convex spring pieces (52) pass through the contraction grooves (51) and are engaged with the clamping grooves (32).

6. The catheter device for removing vascular thrombus according to claim 3, characterized in that: The rotating mechanism includes a polygonal column (44) movably inserted into the polygonal groove (41), and one end of the polygonal column (44) away from the adjusting column (4) is fixedly connected to a rotating shaft (45), and the rotating shaft (45) is rotatably connected to the concave seat (33). One end of the rotating shaft (45) passes through the concave seat (33) and is fixedly sleeved with a synchronous bevel gear (46). The upper end of the side of the synchronous bevel gear (46) is engaged with a transmission bevel gear (47), and the upper end of the transmission bevel gear (47) is fixedly connected to a round rod (48). The upper end of the round rod (48) passes upward through the top of the protective shell (3) and is fixedly sleeved with a crank (49).

7. The catheter device for removing vascular thrombus according to claim 1, characterized in that: The telescopic mechanism includes an adjusting pipe (62) installed through the inner cavity of the limiting sleeve (6), and both ends of the adjusting pipe (62) are fixedly sleeved with limiting rings (63). The inner cavity side wall of the adjusting pipe (62) is provided with a plurality of slides (64) in a circular array. One end of the guide wire (21) is movably inserted into the inner cavity of the adjusting pipe (62), and one end of the guide wire (21) in the inner cavity of the adjusting pipe (62) is fixedly connected with a plurality of slides (25) in a circular array. Each slide (25) is respectively connected to the adjacent slide (64) in a forward and backward sliding manner. A guide assembly is symmetrically installed at one end of the adjusting pipe (62) close to the suction opening of the suction catheter body (2), and the two cutting mechanisms are respectively installed in the two guide assemblies.

8. The catheter device for removing vascular thrombus according to claim 7, characterized in that: The guide wire (21) is slidably connected to the inner cavity side wall of the regulating pipe (62), and the regulating pipe (62) is slidably connected to the limiting sleeve (6) in a front-to-back manner.

9. The catheter device for removing vascular thrombus according to claim 7, characterized in that: The guide assembly includes a guide tube (65) symmetrically fixedly mounted at one end of the inner cavity of the regulating pipe (62), a guide groove (66) is provided on the inner side of the guide tube (65), a storage groove (67) is provided at one end of the guide groove (66) away from the regulating pipe (62), and the cutting mechanism is mounted in the guide groove (66).

10. The catheter device for removing vascular thrombus according to claim 9, characterized in that: The cutting mechanism comprises a cutting rod (7) slidably mounted in a guide groove (66), one end of the cutting rod (7) being fixedly connected to the guide wire (21), and a cutting head (71) being fixedly mounted on the end of the cutting rod (7) away from the guide wire (21).

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