Thrombus treatment device

Abstract

The utility model discloses a thrombus treatment device which comprises a blocking assembly used for blocking broken thrombus and a breaking assembly capable of doing reciprocating motion to cut and break the thrombus, the blocking assembly comprises a blocking mesh basket with a contraction state and an opening state, and the breaking assembly comprises a breaking mesh basket with a contraction state and an opening state. The blocking mesh basket and the breaking mesh basket are sequentially arranged from the far end to the near end, the thrombus treatment device further comprises a medicine injection assembly used for injecting thrombolysis medicine into blood vessels, the medicine injection assembly is communicated with the breaking assembly, and a plurality of thrombolysis holes allowing the thrombolysis medicine to enter the blood vessels are formed in the breaking assembly. According to the thrombus treatment device, floating thrombus can be blocked through the blocking net basket, and far-section embolism is prevented. Moreover, the crushing assembly can reciprocate at the thrombus occlusion section to realize thrombus crushing, during thrombus crushing, the crushing mesh basket can be in full contact with the thrombus, the thrombus is mechanically crushed, and meanwhile, the function of thrombolysis drugs is assisted, so that subacute and chronic thrombus crushing can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a thrombus treatment device. Background Art

[0002] Venous thromboembolism (VTE), including deep vein thrombosis (DVT) and arterial thromboembolism (ATE), is a common peripheral vascular thrombotic obstructive disease. With social development and changes in lifestyle, the incidence rate is increasing annually across all age groups. Deep vein thrombosis and the resulting pulmonary embolism (PE) are the third most common vascular disease after acute coronary syndrome and ischemic stroke, with an annual incidence of up to 0.1%, placing a significant burden on society and becoming a major global health issue.

[0003] Current treatments for thrombosis primarily include anticoagulation, local thrombus fragmentation, and mechanical thrombectomy. Mechanical thrombectomy is the most widely used. Aspiration thrombectomy is the most commonly used mechanical thrombectomy technique. Although similar devices such as separators can achieve thrombus fragmentation, they remain ineffective for treating subacute and chronic thrombi. Utility Model Content

[0004] The purpose of the utility model is to provide a thrombus treatment device with better thrombus treatment effect in order to solve the problems in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A thrombus treatment device includes a blocking component for intercepting a broken thrombus and a crushing component capable of reciprocating to cut and crush the thrombus, the blocking component includes a blocking basket having a contracted state and an open state, the crushing component includes a crushing basket having a contracted state and an open state, the blocking basket and the crushing basket are arranged sequentially from the distal end to the proximal end, the thrombus treatment device also includes a drug injection component for injecting thrombolytic drugs into the blood vessel, the drug injection component is connected to the crushing component, and the crushing component is provided with a plurality of thrombolytic holes for the thrombolytic drugs to enter the blood vessel.

[0007] In some embodiments, the thrombus treatment device further includes a shell, the blocking assembly further includes a blocking inner tube and a blocking outer tube sleeved on the outside of the blocking inner tube, one of the blocking inner tube and the blocking outer tube is fixedly arranged on the shell, the blocking inner tube and the blocking outer tube are relatively slidably arranged, the distal end of the blocking basket is arranged on the blocking inner tube, and the proximal end of the blocking basket is arranged on the blocking outer tube, and the relative sliding between the blocking inner tube and the blocking outer tube causes the blocking basket to contract or open;

[0008] The crushing assembly further includes a crushing inner tube and a crushing outer tube sleeved on the outer side of the crushing inner tube, wherein the crushing inner tube and the crushing outer tube are arranged to slide relative to each other, the distal end of the crushing basket is arranged on the crushing inner tube, and the proximal end of the crushing basket is arranged on the crushing outer tube, and the crushing inner tube and the crushing outer tube slide relative to each other to cause the crushing basket to contract or expand;

[0009] The crushing inner tube is sleeved on the outside of the blocking outer tube, and the two are arranged to be able to slide relative to each other.

[0010] In some embodiments, the thrombus treatment device also includes a first driving mechanism for driving the blocking inner tube and the blocking outer tube to slide relative to each other, the first driving mechanism including a first driving slider, the first driving slider being slidably disposed on the shell, and the first driving slider being fixedly connected to the blocking inner tube or the blocking outer tube.

[0011] In some embodiments, a first sliding groove extending from the distal end to the proximal end is provided on the shell, and the first driving slider is partially located in the first sliding groove and can be slidably arranged along the length extension direction of the first sliding groove.

[0012] In some embodiments, the thrombus processing device also includes a second driving mechanism that drives the crushing component as a whole to slide relative to the shell and the blocking component to cut and crush the thrombus. The second driving mechanism includes a second driving slider that can be slidably arranged in the shell, and the second driving slider is fixedly connected to the crushing outer tube.

[0013] In some embodiments, the thrombus treatment device also includes a third driving mechanism for driving the relative sliding between the crushing inner tube and the crushing outer tube, and the third driving mechanism includes a third driving slider that can be slidably arranged in the shell, and the third driving slider is fixedly connected to the crushing inner tube.

[0014] In some embodiments, the third driving mechanism also includes a button rotatably provided on the third driving slider, and the thrombus treatment device also includes a first locking structure for locking the relative position between the crushed inner tube and the crushed outer tube, the first locking structure including a tooth block provided on one of the button and the second driving slider and a plurality of tooth grooves provided on the other to cooperate with the tooth block; when the first locking structure is in a locked state, the tooth block is inserted into one of the tooth grooves; when the first locking structure is in an unlocked state, the tooth block is disengaged from all the tooth grooves.

[0015] In some embodiments, the thrombus treatment device also includes a second locking structure for locking the relative position of the broken outer tube and the shell, the second locking structure includes a shift block rotatably arranged on the second driving slider and a slot arranged on the shell to match the shift block; when the second locking structure is in a locked state, the shift block is located in the slot; when the second locking structure is in an unlocked state, the shift block is disengaged from the slot.

[0016] In some embodiments, the shell is also provided with a second slide groove adapted to the shift block, the second slide groove extends from the distal end to the proximal end, the card slot is located on the side of the second slide groove, and the second slide groove and the card slot are connected, the shift block can be slidably set in the second slide groove, and the shift block can enter the card slot from the second slide groove, or enter the second slide groove from the card slot by rotating relative to the second driving slider.

[0017] In some embodiments, the broken outer tube includes a first tube and a second tube sleeved on the outside of the first tube, the first tube is sleeved on the outside of the broken inner tube, the first tube and the second tube have a gap in the radial direction, the gap forms a first channel for the circulation of thrombolytic drugs, the drug injection assembly includes a drug delivery tube seat connected to the broken outer tube, the drug delivery tube seat is provided with a second channel for the circulation of thrombolytic drugs, the drug delivery tube seat is respectively connected to the first tube and the second tube so that the first channel and the second channel are connected.

[0018] In some embodiments, the crushing basket includes a plurality of wire tubes, the thrombolysis hole is arranged on each of the wire tubes, and each of the thrombolysis holes is arranged toward the inner side of the crushing basket.

[0019] In some embodiments, the blocking basket includes a first blocking basket and a second blocking basket sequentially arranged from the distal end to the proximal end, and the proximal end of the first blocking basket and the distal end of the second blocking basket are fixedly connected or integrally arranged.

[0020] In some embodiments, when the blocking basket and the crushing basket are both in an open state, the maximum outer diameter of the blocking basket fits against the blood vessel wall, and the maximum outer diameter of the blocking basket is greater than the maximum outer diameter of the crushing basket.

[0021] Due to the application of the above technical solution, the thrombus treatment device of the present invention has the following advantages compared with the prior art:

[0022] (1) The thrombus treatment device can not only break up the thrombus through the reciprocating motion of the crushing component, but also block the thrombus that floats away through the blocking basket to prevent distal embolism.

[0023] (2) The crushing component of the thrombus treatment device can perform reciprocating motion in the thrombus occlusion segment to achieve thrombus crushing. During the thrombus crushing process, the crushing basket can fully contact the thrombus, and while mechanically crushing the thrombus, it can assist the action of thrombolytic drugs, thereby achieving the crushing of subacute and chronic thrombi, resulting in a better therapeutic effect on thrombi. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional schematic diagram of the thrombus treatment device of this embodiment;

[0025] Figure 2 is a front view schematic diagram of the thrombus treatment device of this embodiment;

[0026] Figure 3 is a schematic top view of the thrombus treatment device of this embodiment;

[0027] Figure 4 This is a front view schematic diagram of the thrombus treatment device of this embodiment after removing the housing and the blocking component;

[0028] Figure 5 This is a front view schematic diagram of the thrombus treatment device of this embodiment at the blocking component;

[0029] Figure 6 This is a front view schematic diagram of the thrombus treatment device of this embodiment at the crushing component;

[0030] Figure 7 is a front view schematic diagram of the internal structure of the housing of the thrombus treatment device of this embodiment;

[0031] Figure 8 For attachment Figure 7 A partial enlarged schematic diagram in the middle;

[0032] Figure 9 For attachment Figure 7 A partial enlarged schematic diagram of point B in the middle;

[0033] Figure 10 FIG. 1 is a perspective schematic diagram of the second driving slider of the thrombus treatment device of this embodiment.

[0034] Among them: 1. Shell; 11. Fixed seat; 12. First slide; 13. Second slide; 14. Slot; 2. Blocking basket; 21. First blocking basket; 22. Second blocking basket; 31. Blocking inner tube; 32. Blocking outer tube; 4. Crushing basket; 51. Crushing inner tube; 52. Crushing outer tube; 521. First tube; 522. Second tube; 523. First channel; 6. First driving slider; 71. Second driving slider; 711. Tooth groove; 712. Slot; 72. Shift block; 81. Third driving slider; 82. Button; 821. Tooth block; 83. Elastic member; 91. Dosing tube seat; 911. Second channel; 92. Connecting pipe; 93. Three-way valve. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the directions or positional relationships shown in the accompanying drawings, such as Figure 1 In the drawings, the left side is referred to as "front," the right side is referred to as "back," the upper side is referred to as "up," and the lower side is referred to as "down." Directions perpendicular to the paper in the drawings are referred to as "left" and "right." This is intended solely to facilitate the description of the present invention and to simplify the description. It does not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Unless otherwise specified, the proximal end and distal end mentioned in the present invention have the same meaning in terms of direction, that is, in use, the distal end is the end away from the operator, and the proximal end is the end close to the operator. The operator controls the thrombus treatment device at the proximal end.

[0038] like Figures 1 to 3 As shown, the thrombus treatment device of this embodiment includes a housing 1, a blocking component, a crushing component and a drug injection component.

[0039] like Figures 1 to 3 and Figure 5As shown, the blocking assembly includes a blocking basket 2, which has a contracted state and an open state. When the thrombus treatment device enters the blood vessel, the blocking basket 2 is in the contracted state. After the thrombus treatment device enters the blood vessel and reaches the set position, the blocking basket 2 is in the open state. When the blocking basket 2 is in the open state, the maximum outer diameter of the blocking basket 2 is in contact with the blood vessel wall, thereby positioning the blocking basket 2 and simultaneously sealing the blood vessel to prevent the fragmented thrombus from dislodging.

[0040] like Figures 1 to 3 and Figure 5 As shown, the blocking basket 2 includes a first blocking basket 21 and a second blocking basket 22, arranged sequentially from distal to proximal. The proximal end of the first blocking basket 21 and the distal end of the second blocking basket 22 are fixedly connected or integrally arranged. When the blocking basket 2 is in the open state, the outer diameter of the first blocking basket 21 gradually increases from distal to proximal, while the outer diameter of the second blocking basket 22 gradually increases from proximal to distal. The arrangement of the first blocking basket 21 and the second blocking basket 22 achieves a double-layer filtration effect, thereby improving the interception efficiency.

[0041] The mesh sizes of the first blocking basket 21 and the second blocking basket 22 can be the same. The mesh sizes of the first blocking basket 21 and the second blocking basket 22 can also be different. For example, the mesh size of the second blocking basket 22 is relatively large, while the mesh size of the first blocking basket 21 is relatively small. In this way, the second blocking basket 22 is used to intercept large thrombi, and the first blocking basket 21 is used to intercept small thrombi, so that the blocking basket 2 has a dual function of intercepting and capturing thrombi.

[0042] In this embodiment, the proximal end of the first blocking basket 21 and the distal end of the second blocking basket 22 are integrally arranged, and the first blocking basket 21 and the second blocking basket 22 are symmetrically arranged.

[0043] The blocking basket 2 includes a plurality of wires, and the material of the wires is one or more of nickel-titanium alloy, stainless steel wire, and high molecular polymer. In this embodiment, the blocking basket 2 is woven from 96-160 nickel-titanium wires.

[0044] like Figure 5As shown, the blocking assembly also includes a blocking inner tube 31 and a blocking outer tube 32. The blocking inner tube 31 and the blocking outer tube 32 both extend in the direction from the proximal end to the distal end, and the blocking outer tube 32 is sleeved on the outside of the blocking inner tube 31. One of the blocking inner tube 31 and the blocking outer tube 32 is fixedly arranged on the shell 1, and the blocking inner tube 31 and the blocking outer tube 32 can be relatively slidably arranged along the length extension direction thereof. The distal end of the blocking basket 2 is arranged on the blocking inner tube 31, that is, the distal end of the first blocking basket 21 is arranged on the blocking inner tube 31. The proximal end of the blocking basket 2 is arranged on the blocking outer tube 32, that is, the proximal end of the second blocking basket 22 is arranged on the blocking outer tube 32.

[0045] When the blocking inner tube 31 and the blocking outer tube 32 slide relative to each other, the blocking basket 2 switches between a retracted state and an open state. Specifically, when the blocking inner tube 31 slides toward the direction of retraction into the blocking outer tube 32, the blocking basket 2 opens. When the blocking inner tube 31 slides toward the direction of extension into the blocking outer tube 32, the blocking basket 2 retracts.

[0046] Moreover, when the relative sliding distances between the blocking inner tube 31 and the blocking outer tube 32 are different, the outer diameters of the blocking basket 2 can be made different, even when the blocking basket 2 is in different opening states. In this way, the blocking basket 2 can be adapted to blood vessels of different thicknesses.

[0047] The crushing component can reciprocate back and forth in the direction from the distal end to the proximal end, thereby cutting and crushing the thrombus.

[0048] like Figures 1 to 4 and Figure 6 As shown, the crushing assembly includes a crushing basket 4, which has a contracted state and an open state. When the thrombus treatment device enters the blood vessel, the crushing basket 4 is in the contracted state. When the thrombus treatment device reaches the set position after entering the blood vessel, the crushing basket 4 is in the open state. When the crushing basket 4 is in the open state, the crushing assembly as a whole reciprocates, cutting and crushing the thrombus through the crushing basket 4. When both the blocking basket 2 and the crushing basket 4 are in the open state, the maximum outer diameter of the blocking basket 2 is greater than the maximum outer diameter of the crushing basket 4.

[0049] The crushing basket 4 includes a plurality of wire tubes, and the material of the wire tubes is one or more of nickel-titanium alloy, stainless steel, and high molecular polymer. In this embodiment, the crushing basket 4 is formed by uniformly winding or braiding nickel-titanium alloy tubes.

[0050] like Figure 6As shown, the crushing assembly further includes a crushing inner tube 51 and a crushing outer tube 52, both extending from the proximal end to the distal end. The crushing outer tube 52 is sleeved onto the outer tube 51, and the crushing inner tube 51 and the crushing outer tube 52 are relatively slidable along their lengthwise extension. The crushing inner tube 51 is sleeved onto the outer blocking tube 32, and the crushing inner tube 51 and the blocking outer tube 32 are relatively slidable along their lengthwise extension.

[0051] The relative sliding between the inner crushing tube 51 and the outer crushing tube 52 causes the crushing basket 4 to switch between a retracted state and an open state. Specifically, when the inner crushing tube 51 slides toward the outer crushing tube 52, the crushing basket 4 opens. When the inner crushing tube 51 slides toward the outer crushing tube 52, the crushing basket 4 retracts.

[0052] Moreover, when the relative sliding distances between the crushing inner tube 51 and the crushing outer tube 52 are different, the outer diameters of the crushing basket 4 can be made different, even when the crushing basket 4 is in different opening states. In this way, the crushing basket 4 can be suitable for blood vessels of different thicknesses.

[0053] The thrombus treatment device further includes a first driving mechanism, which is used to drive the inner blocking tube 31 and the outer blocking tube 32 to slide relative to each other.

[0054] like Figures 1 to 3 As shown, the first drive mechanism includes a first drive slider 6, which is slidably disposed on the housing 1 and fixedly connected to the blocking inner tube 31 or the blocking outer tube 32. When the first drive slider 6 slides relative to the housing 1, it drives the blocking inner tube 31 or the blocking outer tube 32 to slide synchronously, thereby causing relative sliding between the blocking inner tube 31 and the blocking outer tube 32.

[0055] In this embodiment, a fixing seat 11 is provided on the housing 1, and the proximal end of the blocking inner tube 31 is fixedly provided on the fixing seat 11. The blocking inner tube 31 extends toward the distal end through the inner cavity of the housing 1. The proximal end of the blocking outer tube 32 extends into the inner cavity of the housing 1 and is fixedly connected to the first driving slider 6. Figures 1 to 3 shown.

[0056] like Figure 1 and Figure 2 As shown, the majority of the first drive slider 6 is located outside the housing 1 for easy operation. A first chute 12 extending from the distal end to the proximal end is provided on the housing 1. A small portion of the first drive slider 6 passes through the first chute 12, extends into the inner cavity of the housing 1, and connects to the proximal end of the blocking outer tube 32. The first drive slider 6 is slidably arranged along the length of the first chute 12. The cooperation between the first chute 12 and the first drive slider 6 guides and limits the sliding movement of the first drive slider 6.

[0057] The thrombus treatment device further includes a second driving mechanism, which is used to drive the entire crushing component to slide relative to the housing 1 and the blocking component, thereby cutting and crushing the thrombus.

[0058] like Figure 4 As shown, the second drive mechanism includes a second drive slider 71, which is slidably disposed within the inner cavity of the housing 1 and is fixedly connected to the outer crushing tube 52. When the second drive slider 71 slides back and forth relative to the housing 1, it drives the outer crushing tube 52 to slide synchronously. When the relative position between the outer crushing tube 52 and the inner crushing tube 51 is locked, the entire crushing assembly can slide back and forth synchronously.

[0059] like Figures 1 to 4 As shown, a shift block 72 is provided on the second driving slider 71 , and the shift block 72 extends to the outside of the housing 1 , thereby facilitating operation.

[0060] like Figure 1 and Figure 3 As shown, the housing 1 is provided with a second chute 13 extending from the distal end to the proximal end. A shift block 72 passes through the second chute 13 and extends outside the housing 1. The shift block 72 is slidable along the length of the second chute 13. When the shift block 72 is operated to slide along the second chute 13, it drives the second drive slider 71 to slide synchronously in the same direction. The cooperation between the second chute 13 and the shift block 72 guides and limits the sliding of the second drive slider 71.

[0061] The thrombus treatment device further includes a third driving mechanism, which is used to drive the inner crushing tube 51 and the outer crushing tube 52 to slide relative to each other.

[0062] like Figure 7 As shown, the third drive mechanism includes a third drive slider 81, which is slidably disposed within the housing 1 and fixedly connected to the crushing inner tube 51. When the third drive slider 81 is driven to slide relative to the housing 1, the crushing inner tube 51 is driven to slide synchronously, thereby causing relative sliding between the crushing inner tube 51 and the crushing outer tube 52 when the second drive slider 71 is fixed relative to the housing 1.

[0063] like Figure 7 As shown, a button 82 is provided on the third driving slider 81 , and the button 82 extends to the outside of the housing 1 , thereby facilitating operation.

[0064] The thrombus treatment device further includes a first locking structure, which is used to lock the relative position between the crushing inner tube 51 and the crushing outer tube 52, so that the crushing assembly forms an integral structure.

[0065] The first locking structure includes a tooth block 821 provided on one of the button 82 and the second drive slider 71, and a plurality of tooth grooves 711 provided on the other to cooperate with the tooth block 821. When the first locking structure is in the locked state, the tooth block 821 is inserted into one of the tooth grooves 711, thereby locking the relative position between the button 82, i.e., the third drive slider 81 and the second drive slider 71. When the relative position between the third drive slider 81 and the second drive slider 71 is fixed, the relative position between the crushed inner tube 51 and the crushed outer tube 52 is fixed, as shown in FIG. Figure 7 When the first locking structure is in the unlocked state, the tooth block 821 is disengaged from all the tooth grooves 711, and the third driving slider 81 can slide relative to the second driving slider 71, thereby causing the crushing inner tube 51 and the crushing outer tube 52 to slide relative to each other.

[0066] like Figure 7 and Figure 8 As shown, the button 82 is rotatably connected to the third drive slider 81. Rotating the button 82 relative to the third drive slider 81 switches the first locking structure between a locked state and an unlocked state. When the first locking structure is in the locked state, pressing the button 82 rotates in a first direction, disengaging the tooth block 821 from the tooth groove 711, thereby unlocking the first locking structure.

[0067] An elastic member 83 is further provided between the button 82 and the third driving slider 81 . The elastic force of the elastic member 83 is used to drive the button 82 to rotate in a second direction opposite to the first direction, thereby automatically resetting the first locking structure from the unlocked state to the locked state.

[0068] The thrombus treatment device further includes a second locking structure, which is used to lock the relative position between the broken outer tube 52 and the housing 1 .

[0069] like Figure 1 and Figure 3 As shown, the second locking structure includes the aforementioned shift block 72 and a slot 14 provided on the housing 1 that is compatible with the shift block 72. When the second locking structure is in the locked state, the shift block 72 is located in the slot 14, preventing it from sliding along the second chute 13. The second drive slider 71 and the crushing outer tube 52 are fixed relative to the housing 1. When the second locking structure is in the unlocked state, the shift block 72 is released from the slot 14 and can slide along the second chute 13, causing the second drive slider 71 and the crushing outer tube 52 to slide synchronously relative to the housing 1.

[0070] like Figure 1 and Figure 3As shown, the latching slot 14 is located to the side of the second chute 13, and the second chute 13 and the latching slot 14 are connected. The shifting block 72 is rotatably disposed on the second driving slider 71. When the shifting block 72 rotates relative to the second driving slider 71, the shifting block 72 enters the latching slot 14 from the second chute 13, or enters the second chute 13 from the latching slot 14.

[0071] In this embodiment, Figure 10 As shown, the second drive slider 71 is provided with a slot 712 extending in the circumferential direction, and the shift block 72 is rotatably disposed in the slot 712. The second drive slider 71 has a non-circular cross-section and cooperates with the housing 1 to limit the rotation of the second drive slider 71. When the shift block 72 rotates relative to the second drive slider 71, the second drive slider 71 does not rotate with it.

[0072] The drug injection component is used to inject thrombolytic drugs into the blood vessels. The drug injection component is connected to the crushing component. Each wire tube of the crushing basket 4 is provided with a plurality of thrombolytic holes 41 for the thrombolytic drugs to enter the blood vessels. The thrombolytic drugs are sprayed into the blood vessels through the thrombolytic holes 41 to dissolve the thrombus. Through the combined action of the thrombolytic drugs and the crushing basket 4, the thrombus treatment effect can be better, and the treatment of subacute and chronic thrombi can be achieved.

[0073] like Figure 6 、 Figure 7 and Figure 9 As shown, the crushing outer tube 52 includes a first tube 521 and a second tube 522 sleeved on the outside of the first tube 521. The first tube 521 is sleeved on the outside of the crushing inner tube 51. The first tube 521 and the second tube 522 have a gap in the radial direction, and the gap forms a first channel 523 for the circulation of thrombolytic drugs. The first channel 523 is connected to the tube cavity of each wire tube of the crushing basket 4.

[0074] like Figure 7 and Figure 9 As shown, the drug injection assembly includes a drug delivery tube seat 91, which is arranged in the shell 1 and fixedly arranged on the second driving slider 71. The drug delivery tube seat 91 is provided with a second channel 911 for the circulation of thrombolytic drugs. The drug delivery tube seat 91 is respectively connected to the first tube 521 and the second tube 522, so that the first channel 523 and the second channel 911 are connected.

[0075] like Figures 1 to 3 As shown, the drug injection assembly further includes a connecting tube 92 disposed on the drug delivery tube holder 91 and communicating with the second channel 911, and a three-way valve 93 disposed on the connecting tube 92. Medical personnel can inject thrombolytic drugs into the connecting tube 92 through the three-way valve 93. The thrombolytic drugs enter the first channel 523 through the second channel 911, then enter the wire tubes of the crushing basket 4, and are ejected from the thrombolytic holes 41 on the wire tubes.

[0076] The thrombolytic holes 41 on each wire tube are all arranged toward the inner side of the crushing basket 4. In this way, the thrombolytic drug can better contact the thrombus, thereby more effectively dissolving the thrombus.

[0077] The thrombus treatment device also includes a suction component. After the thrombus is broken by the crushing component, the crushing basket 4 is in a contracted state, and the crushed thrombus is extracted from the body by the suction component. The suction component can adopt the structure of the existing technology and will not be described in detail here.

[0078] The working principle of the thrombus treatment device is as follows:

[0079] When the thrombus treatment device enters a blood vessel, both the blocking basket 2 and the crushing basket 4 are in a retracted state. The shifting block 72 is located within the retaining slot 14 of the housing 1, locking the second locking structure. This secures the second driving slider 71 and the outer crushing tube 52 relative to the housing 1. The elastic force of the resilient member 83 locks the first locking structure, securing the inner crushing tube 51 and the outer crushing tube 52 relative to each other.

[0080] When the thrombus treatment device enters the blood vessel and reaches the set position, the first driving slider 6 is pushed toward the distal direction, so that the first driving slider 6 drives the blocking outer tube 32 to slide toward the distal direction. Since the blocking inner tube 31 is fixed on the shell 1 and remains stationary, the blocking basket 2 is opened and adheres to the blood vessel wall. The first blocking basket 21 and the second blocking basket 22 of the blocking basket 2 form a double-layer filter to begin to intercept the thrombus.

[0081] Pressing button 82 causes it to rotate relative to third drive slider 81, disengaging tooth block 821 from tooth slot 711 and unlocking the first locking mechanism. Pushing button 82 proximally causes third drive slider 81 and crushing inner tube 51 to slide synchronously in the same direction. Because the crushing outer tube 52 and housing 1 are locked by the second locking mechanism, the crushing outer tube 52 remains stationary. The crushing inner tube 51 slides proximally, opening the crushing basket 4. When the crushing basket 4 reaches the desired size, releasing button 82 causes it to rotate in the second direction under the elastic force of elastic member 83, relocking the first locking mechanism and securing the crushing inner tube 51 and outer tube 52 relative to each other.

[0082] The shifting block 72 rotates relative to the second drive slider 71, disengaging the locking slot 14 and entering the second chute 13. This pushes the shifting block 72 to reciprocate along the second chute 13, driving the first drive slider 71 and the crushing assembly along the second chute 13. This reciprocates the crushing basket 4 in the open position, breaking up the embolus. During this process, the position of the occluding basket 2 within the blood vessel remains fixed.

[0083] If the thrombus-breaking effect is unsatisfactory, the button 82 is pressed again to fully open the thrombus-breaking basket 4. A thrombolytic drug is then injected into the three-way valve 93. The drug enters the first channel 523 through the second channel 911 and then enters the thrombus-breaking basket 4. The thrombus-breaking basket 4 sprays the drug into its interior, dissolving the clot. The shifting block 72 is then pushed to reciprocate along the second chute 13. The thrombus-breaking basket 4 reciprocates in its open state, achieving the desired thrombus-breaking effect.

[0084] After the thrombus crushing operation is completed, the operating button 82 unlocks the second locking structure, causing the crushing inner tube 51 to slide distally, thereby converting the crushing basket 4 to a contracted state. The suction component is activated to suck the thrombus out of the body.

[0085] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A thrombus treatment device, characterized in that: The device comprises a blocking component for intercepting the broken thrombus and a crushing component capable of reciprocating motion to cut and crush the thrombus, the blocking component comprises a blocking basket having a contracted state and an open state, the crushing component comprises a crushing basket having a contracted state and an open state, the blocking basket and the crushing basket are sequentially arranged from the distal end to the proximal end, the thrombus treatment device further comprises a drug injection component for injecting thrombolytic drugs into the blood vessel, the drug injection component is connected to the crushing component, and the crushing component is provided with a plurality of thrombolytic holes for the thrombolytic drugs to enter the blood vessel.

2. The thrombus treatment device according to claim 1, characterized in that: The thrombus treatment device further includes a housing, and the blocking assembly further includes a blocking inner tube and a blocking outer tube sleeved on the outside of the blocking inner tube. One of the blocking inner tube and the blocking outer tube is fixedly arranged on the housing, and the blocking inner tube and the blocking outer tube are arranged to slide relative to each other. The distal end of the blocking basket is arranged on the blocking inner tube, and the proximal end of the blocking basket is arranged on the blocking outer tube. The blocking inner tube and the blocking outer tube slide relative to each other to shrink or expand the blocking basket. The crushing assembly further includes a crushing inner tube and a crushing outer tube sleeved on the outer side of the crushing inner tube, wherein the crushing inner tube and the crushing outer tube are arranged to slide relative to each other, the distal end of the crushing basket is arranged on the crushing inner tube, and the proximal end of the crushing basket is arranged on the crushing outer tube, and the crushing inner tube and the crushing outer tube slide relative to each other to cause the crushing basket to contract or expand; The crushing inner tube is sleeved on the outside of the blocking outer tube, and the two are arranged to be able to slide relative to each other.

3. The thrombus treatment device according to claim 2, characterized in that: The thrombus treatment device also includes a first driving mechanism for driving the blocking inner tube and the blocking outer tube to slide relative to each other, the first driving mechanism including a first driving slider, the first driving slider being slidably disposed on the shell, and the first driving slider being fixedly connected to the blocking inner tube or the blocking outer tube.

4. The thrombus treatment device according to claim 3, characterized in that: The housing is provided with a first sliding groove extending from the distal end to the proximal end. The first driving slider is partially located in the first sliding groove and can be slidably arranged along the length extension direction of the first sliding groove.

5. The thrombus treatment device according to claim 2, characterized in that: The thrombus treatment device also includes a second driving mechanism that drives the crushing assembly as a whole to slide relative to the shell and the blocking assembly to cut and crush the thrombus. The second driving mechanism includes a second driving slider that can be slidably arranged in the shell, and the second driving slider is fixedly connected to the crushing outer tube.

6. The thrombus treatment device according to claim 5, characterized in that: The thrombus treatment device further includes a third driving mechanism for driving the crushing inner tube and the crushing outer tube to slide relative to each other. The third driving mechanism includes a third driving slider slidably disposed in the housing, and the third driving slider is fixedly connected to the crushing inner tube.

7. The thrombus treatment device according to claim 6, characterized in that: The third driving mechanism further includes a button rotatably disposed on the third driving slider. The thrombus treatment device further includes a first locking structure for locking the relative position between the crushing inner tube and the crushing outer tube. The first locking structure includes a tooth block disposed on one of the button and the second driving slider, and a plurality of tooth grooves disposed on the other of the tooth block and cooperating with the tooth block. When the first locking structure is in a locked state, the tooth block is inserted into one of the tooth grooves. When the first locking structure is in the unlocked state, the tooth block is disengaged from all the tooth grooves.

8. The thrombus treatment device according to claim 5, characterized in that: The thrombus treatment device further includes a second locking structure for locking the relative position of the outer shredder tube and the housing, the second locking structure including a shifting block rotatably disposed on the second driving slider and a slot disposed on the housing and adapted to fit the shifting block; When the second locking structure is in a locked state, the shift block is located in the slot; When the second locking structure is in the unlocked state, the shift block is disengaged from the slot.

9. The thrombus treatment device according to claim 8, characterized in that: The shell is also provided with a second slide groove adapted to the shift block, the second slide groove extends from the distal end to the proximal end, the clamping slot is located on the side of the second slide groove, and the second slide groove and the clamping slot are connected, the shift block can be slidably set in the second slide groove, and the shift block can enter the clamping slot from the second slide groove, or enter the second slide groove from the clamping slot, by rotating relative to the second driving slider.

10. The thrombus treatment device according to claim 2, characterized in that: The broken outer tube includes a first tube and a second tube sleeved on the outside of the first tube, the first tube is sleeved on the outside of the broken inner tube, the first tube and the second tube have a gap in the radial direction, the gap forms a first channel for the circulation of thrombolytic drugs, the drug injection assembly includes a drug delivery tube seat connected to the broken outer tube, the drug delivery tube seat is provided with a second channel for the circulation of thrombolytic drugs, the drug delivery tube seat is respectively connected to the first tube and the second tube so that the first channel and the second channel are in communication.

11. The thrombus treatment device according to claim 1, characterized in that: The crushing basket includes a plurality of wire tubes, the thrombolysis hole is arranged on each of the wire tubes, and each of the thrombolysis holes is arranged toward the inner side of the crushing basket.

12. The thrombus treatment device according to claim 1, characterized in that: The blocking basket comprises a first blocking basket and a second blocking basket sequentially arranged from the distal end to the proximal end, wherein the proximal end of the first blocking basket and the distal end of the second blocking basket are fixedly connected or integrally arranged.

13. The thrombus treatment device according to claim 1, characterized in that: When the blocking basket and the crushing basket are both in an open state, the maximum outer diameter of the blocking basket fits against the blood vessel wall, and the maximum outer diameter of the blocking basket is greater than the maximum outer diameter of the crushing basket.

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