Thrombus extraction device special for brain blood vessels

Abstract

The invention relates to the technical field of blood vessel thrombus extraction, and discloses an intracerebral thrombus extraction device which comprises a sheathing canal and further comprises blocking mechanisms arranged on the outer wall of the sheathing canal and on the two sides of the sheathing canal and used for blocking blood vessels. The crushing mechanism is arranged between the two plugging mechanisms and is used for crushing thrombus at a focus; and the guiding mechanism is arranged at the end part of the sheathing canal and is used for guiding the sheathing canal to enter the blood vessel. The plugging mechanism comprises a first installation cavity, a second installation cavity, a third installation cavity and a fourth installation cavity, the two sliding rails are symmetrically installed in the first installation cavity, and an air bag is installed in the first installation cavity and used for expanding to block blood flow. According to the thrombus crushing device, by means of the arranged crushing mechanism, when the first sliding block is pushed to move, the distance between the first sliding block and the second sliding block is shortened through the arranged crushing wire, and therefore the crushing wire is extruded to be expanded, thrombus crushing is achieved, and thrombus suction is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of vascular thrombus removal, and in particular to a cerebrovascular thrombus removal device. Background Art

[0002] Cerebrovascular embolism, also known as cerebral embolism, is a cerebrovascular disease that refers to a clinical syndrome in which various emboli (such as plaques in the blood vessel wall, fat, tumor cells, air, etc.) enter the cerebral arteries with the blood flow, causing acute vascular occlusion or severe stenosis, causing local brain tissue ischemia, hypoxic necrosis, and rapid onset of corresponding neurological deficits (such as hemiplegia, aphasia, etc.).

[0003] For example, the announcement number CN 218128663 U discloses an interventional thrombectomy device for cerebral vascular embolism, comprising a tube body, a thrombectomy assembly is arranged in the tube body, and the thrombectomy assembly is composed of a support tube, a filter A, a cylinder A, a filter B, a cylinder B, a filter C and a guide head. The inner peripheries of the tube body, the cylinder A and the cylinder B are all sleeved with a support tube for protection. A filter A for filtering is detachably connected between the tube body and the cylinder A, a filter B for filtering is detachably connected between the cylinder A and the cylinder B, and a filter C for filtering is detachably connected between the cylinder B and the guide head. The thrombectomy assembly can effectively and conveniently extract thrombi from cerebrovascular patients, which is convenient to reduce the possibility of thrombi dispersing with blood when extracting thrombi, improve the stability and work efficiency of thrombectomy, thereby improving the safety efficiency of patients and facilitating the improvement of the practicality of the thrombectomy device.

[0004] However, when removing a thrombus, the above-mentioned thrombus removal device blocks the blood vessel through an airbag and absorbs the thrombus through a guide head. However, during the actual absorption, the absorption position needs to be constantly adjusted, and there may be stubborn thrombi attached that are difficult to be absorbed. Therefore, a special thrombus removal device for cerebral blood vessels is proposed to solve the above-mentioned problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a special thrombectomy device for cerebral blood vessels in view of the deficiencies in the above-mentioned prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a special thrombus removal device for cerebral blood vessels, including a sheath tube, and also including:

[0007] A blocking mechanism is arranged on the outer wall of the sheath tube and on both sides of the sheath tube, and is used to block the blood vessel;

[0008] A crushing mechanism, arranged between the two blocking mechanisms, for crushing the thrombus at the lesion;

[0009] A guiding mechanism, disposed at the end of the sheath tube, for guiding the sheath tube into the blood vessel;

[0010] Wherein, the blocking mechanism comprises:

[0011] An installation cavity 1 is provided on the outer wall of the sheath tube;

[0012] Two slide rails are symmetrically installed in the installation cavity one, and an air bag is installed in the installation cavity one for expanding to block blood flow.

[0013] Preferably, the blocking mechanism further comprises:

[0014] A slide groove is provided on the slide rail;

[0015] The sheath sleeve is sleeved on the outer wall of the sheath and moves in the slide groove through a slider fixedly connected to the inner wall of the sheath to limit the expansion of the airbag.

[0016] Preferably, the crushing mechanism comprises:

[0017] A second installation cavity is provided on the outer wall of the sheath tube;

[0018] A slider 1, slidably connected to the outer wall of the installation cavity 2;

[0019] Slider 2 is fixedly connected to the outer wall of the second installation cavity;

[0020] A plurality of crushing wires are respectively connected between the slider 1 and the slider 2. When the distance between the slider 1 and the slider 2 is reduced, the crushing wires are opened to crush the thrombus.

[0021] Preferably, the crushing mechanism further comprises:

[0022] A spiral groove is provided on the outer wall of the second installation cavity, and the first slide block is spirally connected to the spiral groove;

[0023] When the slider 1 spirally approaches the slider 2, the plurality of crushing wires are twisted to crush the thrombus.

[0024] Preferably, the bottom of the slide groove extends to the inner wall of the sheath tube, the inner wall of the sheath tube is movably connected with a catheter, and the outer wall of the catheter is provided with an annular groove and connected with the slider, so as to pull the slider to move;

[0025] When the slider moves, it resists the movement of slider one, so as to push slider one to rotate in the spiral groove, so as to drive slider one to rotate, so as to expand the crushing wire and rotate to crush the thrombus.

[0026] Preferably, the guiding mechanism comprises:

[0027] A guide head, arranged at the right end of the sheath tube;

[0028] A rubber sleeve connected between the guide head and the sheath tube;

[0029] A mounting sleeve fixedly connected to the right end of the sheath tube;

[0030] A round ball, movably connected to the right side of the mounting sleeve, and connected to the guide head through a connecting rod;

[0031] The guide head is deflected on the mounting sleeve by the ball so as to pass through a curved blood vessel.

[0032] Preferably, the guiding mechanism further comprises:

[0033] A rotating shaft is mounted on the inner wall of the mounting sleeve via a micro bearing;

[0034] A plurality of guide rods, slidably connected to the inner wall of the mounting sleeve and connected to the outer wall of the miniature bearing;

[0035] a return spring, connected between the sheath and the rotating shaft, and used for pulling the rotating shaft away from the ball;

[0036] A baffle, fixedly connected to the outer wall of the sphere;

[0037] A push rod is fixedly connected to the outer wall of the rotating shaft and deviates from the side of the center of the circle, and contacts the baffle through the push rod;

[0038] The transmission rod is fixedly connected to the left side of the rotating shaft and slidably connected to the inner wall of the guide tube.

[0039] Preferably, a hexagonal groove is opened on the right side of the conduit, and the transmission rod is slidably connected in the hexagonal groove, and the rubber sleeve is in the shape of a bellows for deflection during guiding.

[0040] The present invention adopts the above technical solution to bring the following beneficial effects:

[0041] 1. The special thrombus removal device for cerebral blood vessels uses a crushing mechanism and a crushing wire to shorten the distance between the slider and the slider when the slider is pushed to move, thereby squeezing the crushing wire to expand it, thereby crushing the thrombus and facilitating the absorption of the thrombus.

[0042] 2. The special thrombectomy device for cerebral blood vessels uses a sealing mechanism to utilize an airbag blocked by a sheath sleeve in an installation cavity. After the sheath sleeve is moved, the airbag expands to seal the blood vessels at both ends of the lesion, so as to facilitate the crushing mechanism to crush the thrombus. At the same time, the thrombus is sucked out by a suction tube installed on the outer wall of the sheath tube during the crushing, so as to prevent the thrombus from flowing to other places with the blood.

[0043] 3. The special thrombectomy device for cerebral blood vessels uses a guide mechanism to deflect the guide head that can be deflected, thereby pushing the direction of the guide head to change, and can guide the deflection head by a push rod, thereby guiding the guide head, thereby facilitating the sheath to pass through, thereby improving the efficiency of the sheath entering the blood vessel during surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the present invention;

[0045] Figure 2 This is a schematic diagram of the structure of the present invention when breaking up a thrombus during tube penetration;

[0046] Figure 3 For the present invention Figure 2 Schematic diagram of the cross-sectional structure of the middle plugging mechanism;

[0047] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0048] Figure 5 It is a schematic diagram of the cross-sectional structure of the present invention;

[0049] Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle;

[0050] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point C in the middle.

[0051] In the figure: 1. sheath; 2. blocking mechanism; 21. sheath sleeve; 22. airbag; 23. slider; 24. slide rail; 25. slide groove; 26. installation cavity one; 3. crushing mechanism; 31. installation cavity two; 32. slider one; 33. slider two; 34. crushing wire; 35. spiral groove; 36. catheter; 4. guiding mechanism; 41. guiding head; 42. rubber sleeve; 43. installation sleeve; 44. ball; 45. connecting rod; 46. baffle; 47. push rod; 48. rotating shaft; 49. miniature bearing; 410. guide rod; 411. reset spring; 412. transmission rod; 5. blood vessel. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0053] See also Figure 1-7One embodiment of the present invention is: a thrombus removal device for cerebral blood vessels, comprising a sheath tube 1, and further comprising:

[0054] The blocking mechanism 2 is arranged on the outer wall of the sheath tube 1 and on both sides of the sheath tube 1 to block the blood vessel 5;

[0055] The crushing mechanism 3 is arranged between the two blocking mechanisms 2 and is used to crush the thrombus at the lesion;

[0056] A guiding mechanism 4 is provided at the end of the sheath tube 1 and is used to guide the sheath tube 1 into the blood vessel 5;

[0057] Wherein, the blocking mechanism 2 comprises:

[0058] A mounting cavity 26 is provided on the outer wall of the sheath tube 1;

[0059] The two slide rails 24 are symmetrically installed in the installation cavity 26, and the air bag 22 is installed in the installation cavity 26 for expanding to block the blood flow.

[0060] The blocking mechanism 2 also includes:

[0061] A slide groove 25 is provided on the slide rail 24;

[0062] The sheath sleeve 21 is sleeved on the outer wall of the sheath 1 and moves in the slide groove 25 through a slider 23 fixedly connected to the inner wall of the sheath sleeve 21 to limit the expansion of the airbag 22 .

[0063] Working principle: When performing a vascular thrombectomy operation, the right end of the sheath 1 is guided by the guiding mechanism 4 and enters the interior of the blood vessel 5. At the same time, the two blocking mechanisms 2 are used. After moving to the lesion of the blood vessel 5, the catheter 36 is pulled to move, and then the slider 23 is driven to move at the same time, thereby driving the sheath sleeve 21 to move, and the airbag 22 set in the installation cavity 26 is inflated and expanded to achieve blocking of the blood vessels at both ends of the lesion, so as to facilitate the removal of the thrombus at the lesion using the crushing mechanism 3.

[0064] See also Figure 1-7 Based on the above embodiment, in another embodiment of the present invention, the crushing mechanism 3 includes:

[0065] The second installation cavity 31 is provided on the outer wall of the sheath tube 1;

[0066] Sliding block 1 32, slidably connected to the outer wall of mounting cavity 2 31;

[0067] The second slider 33 is fixedly connected to the outer wall of the second mounting cavity 31;

[0068] A plurality of crushing wires 34 are respectively connected between the slider 1 32 and the slider 2 33 . When the distance between the slider 1 32 and the slider 2 33 decreases, the crushing wires 34 open to crush the thrombus.

[0069] The crushing mechanism 3 also includes:

[0070] The spiral groove 35 is formed on the outer wall of the second mounting cavity 31, and the first slider 32 is spirally connected to the spiral groove 35;

[0071] When the slider 1 22 spirally approaches the slider 2 33 , the plurality of crushing wires 34 are twisted to crush the thrombus.

[0072] The bottom of the slide groove 25 extends to the inner wall of the sheath tube 1, and the inner wall of the sheath tube 1 is movably connected with a catheter 36, and the outer wall of the catheter 36 is provided with an annular groove and connected to the slider 23, which is used to pull the slider 23 to move;

[0073] When the slider moves, it resists the movement of the slider 1 32 to push the slider 1 32 to rotate in the spiral groove 35, so as to drive the slider 1 32 to rotate, so as to expand the crushing wire 34 to rotate and crush the thrombus.

[0074] Working principle: When the thrombus needs to be cleared, the catheter 36 is pulled to move, which drives the slider 23 to move, and then pushes the slider 1 32 to move, thereby pushing the slider 1 32 closer to the slider 2 33, and at this time, the crushing wire 34 is squeezed, so that it expands to break the thrombus;

[0075] When the slider 32 moves, it is connected to the spiral groove 35, so that the slider 32 will produce a spiral rotation, thereby synchronously driving the crushing wire 34 to spirally expand, thereby expanding and spirally cutting the thrombus to achieve the effect of crushing the thrombus.

[0076] See also Figure 1-7 Based on the above embodiment, in another embodiment of the present invention, the guiding mechanism 4 includes:

[0077] A guide head 41 is arranged at the right end of the sheath tube 1;

[0078] A rubber sleeve 42 connected between the guide head 41 and the sheath tube 1;

[0079] A mounting sleeve 43 is fixedly connected to the right end of the sheath tube 1;

[0080] The ball 44 is movably connected to the right side of the mounting sleeve 43 and connected to the guide head 41 through a connecting rod 45;

[0081] The guide head 41 is deflected on the mounting sleeve 43 by the ball 44 so as to pass through the curved blood vessel 5 .

[0082] The guiding mechanism 4 also includes:

[0083] The rotating shaft 48 is mounted on the inner wall of the mounting sleeve 43 through a micro bearing 49;

[0084] A plurality of guide rods 410 are slidably connected to the inner wall of the mounting sleeve 43 and connected to the outer wall of the miniature bearing 49;

[0085] A return spring 411 is connected between the sheath tube 1 and the rotating shaft 48 and is used to pull the rotating shaft 48 away from the ball 44;

[0086] The baffle 46 is fixedly connected to the outer wall of the sphere 44;

[0087] A push rod 47 is fixedly connected to the outer wall of the rotating shaft 48 and deviates from the side of the center of the circle, and contacts the baffle 46 through the push rod 47;

[0088] The transmission rod 412 is fixedly connected to the left side of the rotating shaft 48 and slidably connected to the inner wall of the guide tube 36 .

[0089] A hexagonal groove is provided on the right side of the guide tube 36, and the transmission rod 412 is slidably connected in the hexagonal groove. The rubber sleeve 42 is in the shape of a bellows and is used for deflection during guidance.

[0090] Working principle: After the guiding sheath 1 enters the blood vessel 5, the sheath 1 is first pushed to move into the blood vessel 5. When the guiding head 41 needs to be adjusted to adjust the direction, the catheter 36 is pushed, which contacts the transmission rod 412 and pushes the rotating shaft 48 to move. When the push rod 47 on one side of the rotating shaft 48 contacts and abuts against the baffle 46, it is only necessary to rotate the catheter 36 and rotate it on the inner wall of the sheath 1 through the annular groove, and synchronously drive the rotating shaft 48 to rotate in the micro bearing 49, so that the baffle 46 can be deflected to change the deflection angle of the guiding head 41 through the ball 44, so as to achieve steering when crossing the blood vessel 5 and improve the guiding effect;

[0091] At the same time, after the catheter 36 is released, under the action of the return spring 411, the rotating shaft 48 and the micro bearing 49 are pulled to move on the inner wall of the mounting sleeve 43, so that the push rod 47 is out of contact with the baffle 46 to maintain a straight line when crossing.

[0092] The present invention provides a device for removing thrombi from cerebral blood vessels. There are many methods and approaches to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A thrombus removal device for use in cerebral blood vessels, comprising a sheath tube (1), characterized in that: Also includes: A blocking mechanism (2) is arranged on the outer wall of the sheath tube (1) and on both sides of the sheath tube (1) and is used to block the blood vessel (5); A crushing mechanism (3) is arranged between the two blocking mechanisms (2) and is used to crush the thrombus at the lesion; A guiding mechanism (4) is arranged at the end of the sheath tube (1) and is used to guide the sheath tube (1) into the blood vessel (5); Wherein, the blocking mechanism (2) comprises: A mounting cavity 1 (26) is provided on the outer wall of the sheath tube (1); Two slide rails (24) are symmetrically mounted in the first mounting cavity (26), and an air bag (22) is mounted in the first mounting cavity (26) for expanding to block blood flow.

2. The device for removing thrombi from cerebral blood vessels according to claim 1, characterized in that: The blocking mechanism (2) further comprises: A slide groove (25) is provided on the slide rail (24); The sheath sleeve (21) is sleeved on the outer wall of the sheath (1) and moves in the slide groove (25) through a slider (23) fixedly connected to the inner wall of the sheath sleeve, so as to limit the expansion of the airbag (22).

3. The device for removing thrombi from cerebral blood vessels according to claim 2, characterized in that: The crushing mechanism (3) comprises: A second mounting cavity (31) is provided on the outer wall of the sheath tube (1); Sliding block 1 (32) is slidably connected to the outer wall of the mounting cavity 2 (31); Sliding block 2 (33) is fixedly connected to the outer wall of mounting cavity 2 (31); A plurality of crushing wires (34) are respectively connected between the slider 1 (32) and the slider 2 (33). When the distance between the slider 1 (32) and the slider 2 (33) decreases, the crushing wires (34) open to crush the blood clot.

4. The device for removing thrombi from cerebral blood vessels according to claim 3, characterized in that: The crushing mechanism (3) further comprises: A spiral groove (35) is provided on the outer wall of the second installation cavity (31), and the first sliding block (32) is spirally connected to the spiral groove (35); When the slider 1 (32) spirally approaches the slider 2 (33), the plurality of crushing wires (34) are twisted to crush the thrombus.

5. The device for removing thrombi from cerebral blood vessels according to claim 4, characterized in that: The bottom of the slide groove (25) extends to the inner wall of the sheath tube (1), the inner wall of the sheath tube (1) is movably connected with a catheter (36), and the outer wall of the catheter (36) is provided with an annular groove and connected to the slider (23) for pulling the slider (23) to move; When the slider moves, it resists the movement of slider one (32) to push slider one (32) to rotate in the spiral groove (35), thereby driving slider one (32) to rotate and expand the crushing wire (34) to rotate and crush the thrombus.

6. The device for removing thrombi from cerebral blood vessels according to claim 5, characterized in that: The guiding mechanism (4) comprises: A guide head (41) is arranged at the right end of the sheath tube (1); A rubber sleeve (42) connected between the guide head (41) and the sheath tube (1); A mounting sleeve (43) fixedly connected to the right end of the sheath tube (1); A round ball (44) is movably connected to the right side of the mounting sleeve (43) and is connected to the guide head (41) via a connecting rod (45); The guide head (41) is deflected on the mounting sleeve (43) by a spherical ball (44) so ​​as to pass through a curved blood vessel (5).

7. The device for removing thrombi from cerebral blood vessels according to claim 6, characterized in that: The guiding mechanism (4) further comprises: A rotating shaft (48) is mounted on the inner wall of the mounting sleeve (43) via a micro bearing (49); A plurality of guide rods (410) are slidably connected to the inner wall of the mounting sleeve (43) and connected to the outer wall of the miniature bearing (49); A return spring (411) is connected between the sheath tube (1) and the rotating shaft (48) and is used to pull the rotating shaft (48) away from the ball (44); A baffle (46) fixedly connected to the outer wall of the sphere (44); A push rod (47) is fixedly connected to the outer wall of the rotating shaft (48) and is offset from the center of the circle, and is in contact with the baffle (46) through the push rod (47); The transmission rod (412) is fixedly connected to the left side of the rotating shaft (48) and slidably connected to the inner wall of the guide tube (36).

8. The device for removing thrombi from cerebral blood vessels according to claim 7, characterized in that: A hexagonal groove is provided on the right side of the guide tube (36), and the transmission rod (412) is slidably connected in the hexagonal groove. The rubber sleeve (42) is in the shape of a bellows and is used for deflection during guidance.

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