Multifunctional internal fistula thrombus extraction device

Abstract

The utility model provides a multifunctional internal fistula thrombus taking-out device which comprises a first pipe fitting, a second pipe fitting, a third pipe fitting and a fourth pipe fitting. A second pipe fitting; the thrombolysis pipe fitting is arranged on the outer side of the second pipe fitting in a sleeving mode and is internally hollow to form a medicine cavity, and a plurality of medicine outlet holes communicating with the medicine cavity are formed in the outer wall of the far end of the thrombolysis pipe fitting in a penetrating mode; the crushing mechanism comprises a positioning piece connected with the far end of the thrombolysis pipe fitting and movably arranged on the outer side of the second pipe fitting in a sleeving mode, a driving pipe movably arranged on the outer side of the thrombolysis pipe fitting in a sleeving mode and located on the near end side of the positioning piece, and a plurality of crushing pieces connected between the far end of the driving pipe and the positioning piece, and the positioning piece is limited by a limiting structure when moving towards the far end. A plurality of thrombus in the internal fistula blood vessel can be effectively treated, the incision of the thrombus extraction operation can be greatly reduced, and the damage to the blood vessel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to internal fistula thrombus removal device field, specifically point to a kind of multifunctional internal fistula thrombus removal device. BACKGROUND

[0002] Arteriovenous fistula is the "lifeline" of hemodialysis patients, including autologous arteriovenous fistula (AVF) and artificial vascular arteriovenous fistula (AVG). When thrombus is formed in the internal fistula and affects blood circulation, percutaneous transluminal angioplasty (PTA) combined with thrombectomy is needed to achieve internal fistula recanalization. Thrombectomy can be divided into direct incision thrombectomy and thrombectomy catheter thrombectomy.

[0003] Direct incision thrombectomy is to cut a wound on the blood vessel and remove the thrombus. This method has large trauma and poor thrombectomy effect, and can damage the venous valve. Thrombectomy catheter thrombectomy mainly pushes the thrombus out by pulling the balloon back after the balloon is inflated by water. However, the balloon cannot be inflated too much to avoid damaging the blood vessel wall, which leads to the fact that for internal fistula with a large number of thrombus, the balloon cannot be pulled back for a long distance while ensuring that the outer wall of the balloon is always completely attached to the blood vessel wall. Therefore, there may be some thrombus fragments in the internal fistula vessel after the operation, and the thrombus fragments can move to the heart, brain, lungs and other small blood vessels with blood flow and cause serious consequences.

[0004] Aiming at the problems existing in the prior art, the utility model provides a multifunctional internal fistula thrombus removal device, which can effectively solve the problems existing in the prior art. UTILITY MODEL CONTENTS

[0005] Aiming at the problems existing in the prior art, the utility model provides a multifunctional internal fistula thrombus removal device, which can effectively solve the problems existing in the prior art.

[0006] The technical scheme of the utility model is:

[0007] A multifunctional internal fistula thrombus removal device, comprising:

[0008] A first pipe element, a first balloon is connected to the distal end, the first pipe element is used to enter the blood vessel on one side through the corresponding incision and make the first balloon bulge and block on one side of the blood vessel;

[0009] A second pipe element, a second balloon is connected to the distal end, the second pipe element is used to enter the other side of the blood vessel through the incision and make the second balloon bulge and block on the other side of the blood vessel;

[0010] A thrombolytic pipe element is sleeved outside the second pipe element and has a hollow drug cavity inside, and a plurality of drug outlet holes are provided on the outer wall of the distal end of the thrombolytic pipe element and communicate with the drug cavity;

[0011] The breaking mechanism comprises a positioning member connected to the distal end of the thrombolytic tube and movably sleeved outside the second tube, a driving tube movably sleeved outside the thrombolytic tube and located on the proximal side of the positioning member, and a plurality of breaking members connected between the distal end of the driving tube and the positioning member, wherein the positioning member is limited by a limiting structure when moving distally; the driving tube is used for sliding distally to deform and expand the plurality of breaking members, and is used for rotating to helically deform the deformed and expanded breaking members.

[0012] Further, the second tube is provided with a plurality of clamping teeth along the length direction, the inner wall of the positioning member is provided with a plurality of elastic hooks corresponding to the clamping teeth, and the limiting structure comprises the plurality of clamping teeth and the plurality of elastic hooks; the plurality of clamping teeth are used for allowing the plurality of elastic hooks to move proximally and limiting the plurality of elastic hooks from moving distally.

[0013] Further, the end of the plurality of clamping teeth is inclined to the proximal side, the plurality of elastic hooks are bent downward and hooked on the proximal side of a clamping tooth after extending proximally, and the proximal side of the plurality of elastic hooks and the distal side of the plurality of clamping teeth are provided with inclined surfaces matching the inclination.

[0014] Further, the distal end of the driving tube is provided with a movable part connected to the proximal end of the plurality of breaking members and sleeved outside the thrombolytic tube, the inner wall of the movable part is recessed to form a limiting groove, and the outer wall of the thrombolytic tube is protruded to form a limiting ridge inserted into the limiting groove; the driving tube is used for driving the movable part to slide distally to the position where the limiting ridge abuts against the distal end of the limiting groove, so that the plurality of breaking members are deformed and expanded to an outer diameter matching the inner diameter of the blood vessel, the driving tube is used for driving the movable part to rotate to helically deform the deformed and expanded breaking members, and the driving tube is used for driving the movable part to slide proximally to the position where the limiting ridge abuts against the proximal end of the limiting groove, so that the plurality of breaking members are deformed and contracted to an outer diameter smaller than the outer diameter of the positioning member.

[0015] Further, the plurality of breaking members are divided into a plurality of groups and arranged in a ring array outside the distal end of the thrombolytic tube, the plurality of medicine outlet holes are arranged in a ring array on the outer wall of the distal end of the thrombolytic tube, and the plurality of groups of breaking members are arranged in a circumferential staggered manner with the plurality of medicine outlet holes.

[0016] Further, each group of breaking members comprises at least three breaking members, and the three breaking members in the same group are arranged in a spaced distribution away from the thrombolytic tube.

[0017] Further, the first tube and the second tube are both provided with a hole for threading a guide wire along the axial direction.

[0018] Further, the first pipe, the second pipe, the thrombolytic pipe and the driving pipe are driven to move distally or proximally by the corresponding operation handles, and the driving pipe is also driven to rotate by the corresponding operation handle, and the first pipe, the second pipe and the thrombolytic pipe are connected to the corresponding liquid supply device.

[0019] Therefore, the beneficial effects of the present application are:

[0020] 1. By the addition of the first and second capsules and the cooperation between the thrombolytic pipe and the crushing mechanism, during the thrombus removal operation, a plurality of thrombi in the blood vessel can be first blocked between the first and second capsules, then the driving pipe is slid distally to deform and expand the plurality of crushing pieces into the thrombi, and the driving pipe is rotated to spiral deform and crush the thrombi, at the same time, the drug cavity of the thrombolytic pipe is used to supply the thrombolytic drug through the plurality of drug outlets to complete the treatment of the thrombi, and the thrombolytic pipe is pulled back to the next thrombus, and the drug supply of the plurality of drug outlets, the in-and-out movement and rotation of the driving pipe are controlled to control the amount of thrombolytic drug and the expansion and spiral deformation of the plurality of crushing pieces, so that the plurality of thrombi in the internal fistula are crushed and dissolved one by one and then discharged through the incision, and finally, the blood vessel cavity between the first and second capsules is flushed with physiological saline through the incision and then sutured, thus completing the removal of the plurality of thrombi in the internal fistula blood vessel. The thrombus removal device can completely remove the thrombus and will not cause high-risk risks due to thrombus fragments remaining in the blood vessel, and can effectively treat the plurality of thrombi in the internal fistula blood vessel, and the incision of the thrombus removal operation can be greatly reduced, the damage to the blood vessel is reduced, the postoperative recovery of the internal fistula blood vessel and the service life of the internal fistula blood vessel are promoted, and the thrombus removal device has the functions of crushing and dissolving, and has multiple functions.

[0021] 2. The limiting structure comprises a plurality of clamping teeth and a plurality of elastic hooks, and the plurality of clamping teeth are used to allow the plurality of elastic hooks to move proximally and limit the plurality of elastic hooks to move distally. Thus, the positioning member can be pulled proximally by the thrombolytic pipe to the next thrombus corresponding to the plurality of crushing pieces, and when the driving pipe is slid distally to deform and expand the plurality of crushing pieces and rotated to spiral deform and crush the deformed and expanded plurality of crushing pieces, the positioning member will not slide distally to reduce or fail the crushing effect of the plurality of crushing pieces on the thrombi, and the plurality of crushing pieces can crush the plurality of thrombi one by one, and the crushing stability and effect are ensured.

[0022] 3. With the axis of the second capsule and the second tube as the central axis, the drive tube drives the movable part to slide distally until the limiting rib abuts the distal end of the limiting groove, so that several fragments deform and expand outward until their outer diameter matches the inner diameter of the blood vessel. The drive tube also drives the movable part to rotate, so that the deformed and expanded fragments spirally deform, thereby avoiding damage to the inner wall of the blood vessel when the fragments deform and expand or spirally deform. The drive tube also drives the movable part to slide proximally until the limiting rib abuts the proximal end of the limiting groove, so that several fragments deform and shrink until their outer diameter is smaller than the outer diameter of the positioning piece. This allows medical staff to quickly adjust the fragments to a retracted or expanded state, facilitating their movement within the blood vessel. There is no need to constantly adjust and judge whether the fragments have completely shrunk or expanded through imaging structures, thus improving the ease of use, safety, and practicality of the thrombus removal device.

[0023] 4. The circular arrangement improves the thoroughness and uniformity of thrombus fragmentation by several fragmentation components and enhances the uniformity of drug delivery through several drug outlets. At the same time, by circumferentially staggering several sets of fragmentation components and several drug outlets, the fragmentation components can avoid obstructing the drug delivery through the drug outlets, ensuring the contact efficiency between the thrombus and the thrombolytic agent, and improving the fragmentation effect of the fragmentation components and the drug delivery effect of the drug outlets.

[0024] 5. Each fragmentation group includes at least three fragments, and the three fragments in the same group are spaced apart and arranged away from the thrombolysis tubing. This increases the fragmentation density of the fragments, improves the thoroughness of thrombus fragmentation, and further enhances the fragmentation effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a multifunctional arteriovenous fistula thrombus removal device.

[0026] Figure 2 This is a partial cross-sectional view of a multifunctional arteriovenous fistula thrombus removal device during operation.

[0027] Figure 3 for Figure 2 A partial structural diagram of the thrombus removal device.

[0028] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle. Detailed Implementation

[0029] To facilitate understanding by those skilled in the art, the structure of this utility model will now be described in further detail with reference to the accompanying drawings:

[0030] refer to Figures 1-4 A multifunctional arteriovenous fistula thrombus removal device, comprising:

[0031] A first tube 1 is communicated with a first balloon 11 at a distal end, and is used to enter one side of a blood vessel 6 through a corresponding incision 61 and inflate the first balloon 11 to block the one side of the blood vessel 6;

[0032] A second tube 2 is communicated with a second balloon 21 at a distal end, and is used to enter the other side of the blood vessel 6 through the incision 61 and inflate the second balloon 21 to block the other side of the blood vessel 6. Specifically, the first balloon 11 and the second balloon 21 are both balloons, the first tube 1 and the second tube 2 are both balloon tubes, the first tube 1 and the second tube 2 are respectively used to inflate the first balloon 11 and the second balloon 21, the blood vessel 6 is an internal fistula blood vessel 6 and has a plurality of thrombi therein, the incision 61 and the first balloon 11 are sequentially located at a proximal end side of the plurality of thrombi, and the second balloon 21 is located at a distal end side of the plurality of thrombi.

[0033] A thrombolytic tube 3 is sleeved outside the second tube 2 and has a hollow drug cavity 31 inside, and a plurality of drug outlet holes 32 are formed on a distal end outer wall of the thrombolytic tube 3 and communicated with the drug cavity 31;

[0034] A breaking mechanism 4 includes a positioning member 41 connected to a distal end of the thrombolytic tube 3 and movably sleeved outside the second tube 2, a driving tube 42 movably sleeved outside the thrombolytic tube 3 and located at a proximal end side of the positioning member 41, and a plurality of breaking members 43 connected between the driving tube 42 and the positioning member 41. The positioning member 41 is limited by a limiting structure when moving distally. Specifically, the positioning member 41 is fixed to the distal end of the thrombolytic tube 3, and the plurality of breaking members 43 are made of a shape memory material. The driving tube 42 is used to slide distally to deform and expand the plurality of breaking members 43, and is used to rotate to helically deform the plurality of breaking members 43.

[0035] Specifically, a hole is formed on an inner side of each of the first tube 1 and the second tube 2 and communicated with the hole of the other tube along an axial direction, and is used to pass a guide wire 5. The first tube 1, the second tube 2, the thrombolytic tube 3, and the driving tube 42 are driven by corresponding operation handles to move distally or proximally. The driving tube 42 is also driven by the corresponding operation handle to rotate. The first tube 1, the second tube 2, the thrombolytic tube 3 are connected to corresponding liquid supply devices. The operation handle and the liquid supply device are prior art in the medical field and are not the main invention points of the present application. Therefore, the existing products can be referred to, and the specific structure is not described here.

[0036] The structure is provided by adding the first capsule 11 and the second capsule 21, and the cooperation between the thrombolytic pipe 3 and the breaking mechanism 4. During the thrombectomy, the guide wire 5 is first inserted into the blood vessel 6, and the first pipe 1 and the second pipe 2 are respectively moved to the corresponding position along the guide wire 5 through the guide wire 5 channel, so that the several medicine outlets 32 and the several breaking pieces 43 correspond to the most distal thrombus, so that the several thrombi in the blood vessel 6 are blocked between the first capsule 11 and the second capsule 21, and then the driving pipe 42 is slid to the distal end to make the several breaking pieces 43 deform and expand to embed the thrombus, and the driving pipe 42 is rotated to make the several breaking pieces 43 spiral deformation and break the thrombus. At the same time, the medicine cavity 31 of the thrombolytic pipe 3 is used to give medicine to the thrombus through the several medicine outlets 32, and the treatment of the thrombus is completed. As described above, the thrombolytic pipe 3 is pulled back to the next thrombus, and the drug amount of the several medicine outlets 32, the driving pipe 42, and the rotation are controlled to control the expansion and deformation of the several breaking pieces 43 and the spiral deformation, so that the several thrombi in the fistula are broken and dissolved one by one, and then discharged through the incision 61. Finally, the physiological saline is injected through the incision 61 to flush the blood vessel 6 between the first capsule 11 and the second capsule 21, and then the incision 61 is sutured, and the several thrombi in the fistula blood vessel 6 are removed. Therefore, the thrombus is completely removed, and the thrombus fragments are not left in the blood vessel 6 to cause high risk. The several thrombi in the fistula blood vessel 6 are effectively treated, and the several thrombi are broken and dissolved into liquid and then removed, so that the incision 61 of the thrombectomy can be greatly reduced, the damage to the blood vessel 6 is reduced, the postoperative recovery of the fistula blood vessel 6 is promoted, and the service life of the fistula blood vessel 6 is prolonged.

[0037] In order to improve the stability of the plurality of broken pieces 43 when spirally deforming and cutting the thrombus, the second tube 2 is provided with a plurality of clamping teeth 22 along the length direction, the inner wall of the positioning piece 41 is provided with a plurality of elastic hooks 411 corresponding to the clamping teeth 22, and the limiting structure comprises the clamping teeth 22 and the elastic hooks 411. Specifically, the end of the clamping tooth 22 is inclined towards the proximal end, the elastic hook 411 is bent downwards towards the distal end after extending towards the proximal end, and is arranged on the proximal end side of the clamping tooth 22, and the proximal end side of the elastic hook 411 and the distal end side of the clamping tooth 22 are provided with inclined surfaces matching the inclination. The clamping teeth 22 are used to allow the elastic hooks 411 to move towards the proximal end and limit the elastic hooks 411 from moving towards the distal end. Thus, the positioning piece 41 can be pulled by the thrombolytic tube 3 to move towards the proximal end to the corresponding next thrombus of the plurality of broken pieces 43, and when the driving tube 42 slides beyond the distal end to make the plurality of broken pieces 43 deform and expand, rotate to make the plurality of broken pieces 43 spirally deform, the positioning piece 41 will not slide towards the distal end, which will reduce or eliminate the broken effect of the plurality of broken pieces 43 on the thrombus, and the effect of breaking the plurality of thrombi one by one is achieved, and the breaking stability and effect are ensured.

[0038] In order to improve the safety of the plurality of broken pieces 43 when breaking the thrombus, the distal end of the driving tube 42 is provided with a movable part 421 connected to the proximal end of the plurality of broken pieces 43 and sleeved on the outer side of the thrombolytic tube 3, the inner wall of the movable part 421 is recessed to form a limiting groove 422, and the outer wall of the thrombolytic tube 3 is protruded to form a limiting bead 33 inserted into the limiting groove 422. The axis of the second capsule 21 and the second tube 2 is taken as the central axis, the driving tube 42 is used to drive the movable part 421 to slide towards the distal end to make the limiting bead 33 abut against the distal end of the limiting groove 422, so that the plurality of broken pieces 43 deform and expand to an outer diameter matching the inner diameter of the blood vessel 6, the driving tube 42 is used to drive the movable part 421 to rotate to make the plurality of broken pieces 43 spirally deform, thereby avoiding damaging the inner wall of the blood vessel 6 when the plurality of broken pieces 43 deform and expand or spirally deform, the driving tube 42 is used to drive the movable part 421 to slide towards the proximal end to make the limiting bead 33 abut against the proximal end of the limiting groove 422, so that the plurality of broken pieces 43 deform and shrink to an outer diameter smaller than the outer diameter of the positioning piece 41, thereby facilitating the medical staff to quickly adjust the plurality of broken pieces 43 to the collapsed state or the expanded state, so as to facilitate the movement of the plurality of broken pieces 43 in the blood vessel 6, without the need to constantly adjust and judge whether the broken pieces 43 are completely collapsed or completely expanded through the imaging structure, thereby improving the use convenience, safety and practicality of the thrombus removal device.

[0039] In order to improve the crushing effect of the crushing pieces 43 and the drug delivery effect of the drug outlet holes 32, a plurality of the crushing pieces 43 are divided into a plurality of crushing groups 44 and are arranged in a ring array outside the distal end of the thrombolytic pipe 3, a plurality of the drug outlet holes 32 are arranged in a ring array outside the distal end of the thrombolytic pipe 3, and a plurality of the crushing groups 44 and the drug outlet holes 32 are arranged in a circumferential staggered manner. Thus, the crushing completeness and uniformity of the crushing pieces 43 on the thrombus are improved by the ring array arrangement, and the drug delivery uniformity of the drug outlet holes 32 is improved. At the same time, by arranging the crushing groups 44 and the drug outlet holes 32 in a circumferential staggered manner, the drug delivery of the drug outlet holes 32 is prevented from being blocked by the crushing pieces 43, the contact efficiency of the thrombus and the thrombolytic agent is ensured, and the crushing effect of the crushing pieces 43 and the drug delivery effect of the drug outlet holes 32 are improved.

[0040] In order to further improve the crushing effect of the crushing pieces 43, each of the crushing groups 44 includes at least three crushing pieces 43, and the three crushing pieces 43 in the same group are arranged in a spaced manner away from the thrombolytic pipe 3. Thus, the crushing density of the crushing pieces 43 is improved, the crushing completeness of the crushing pieces 43 on the thrombus is improved, and the crushing effect is further improved.

[0041] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-functional internal fistula thrombus extraction device, characterized by, The application relates to a thrombolytic device, which comprises: a first pipe (1) with a first bag (11) at the distal end, which is used to enter one side of a blood vessel (6) through a corresponding incision (61) and make the first bag (11) bulge to block the other side of the blood vessel (6); a second pipe (2) with a second bag (21) at the distal end, which is used to enter the other side of the blood vessel (6) through the incision (61) and make the second bag (21) bulge to block the other side of the blood vessel (6); a thrombolytic pipe (3) which is sleeved outside the second pipe (2) and has a medicine cavity (31) inside, and a plurality of medicine outlet holes (32) are arranged on the outer wall of the distal end of the thrombolytic pipe (3) and are connected with the medicine cavity (31); a breaking mechanism (4) which comprises a positioning member (41) connected with the distal end of the thrombolytic pipe (3) and movably sleeved outside the second pipe (2), a driving pipe (42) movably sleeved outside the thrombolytic pipe (3) and located on the proximal end side of the positioning member (41), and a plurality of breaking members (43) connected between the distal end of the driving pipe (42) and the positioning member (41), wherein the positioning member (41) is limited by a limiting structure when moving towards the distal end, and the plurality of breaking members (43) are made of a shape memory material; the driving pipe (42) is used for sliding towards the distal end to make the plurality of breaking members (43) deform and expand outward, and is used for rotating to make the plurality of breaking members (43) spiral deform.

2. The multi-functional internal fistula thrombectomy device of claim 1, wherein, The second pipe (2) is provided with a plurality of clamping teeth (22) along the length direction, the inner ring wall of the positioning member (41) is provided with a plurality of elastic hooks (411) corresponding to the clamping teeth (22), and the limiting structure comprises the plurality of clamping teeth (22) and the plurality of elastic hooks (411); the plurality of clamping teeth (22) are used for allowing the plurality of elastic hooks (411) to move towards the proximal end and limiting the plurality of elastic hooks (411) from moving towards the distal end.

3. The multi-functional internal fistula thrombectomy device of claim 2, wherein, The end of the plurality of clamping teeth (22) is inclined towards the proximal end side, the plurality of elastic hooks (411) are bent downwards and hooked on the proximal end side of one clamping tooth (22) after extending towards the proximal end, and the proximal end side of the plurality of elastic hooks (411) and the distal end side of the plurality of clamping teeth (22) are provided with inclined surfaces which are adapted to the inclination.

4. The multi-functional internal fistula thrombectomy device of claim 1, wherein, The distal end of the driving tube (42) is provided with a movable part (421) connected to the proximal ends of the crushing pieces (43) and sleeved outside the thrombolytic tube (3). The inner wall of the movable part (421) is recessed to form a limiting groove (422), and the outer wall of the thrombolytic tube (3) is protruded to form a limiting ridge (33) inserted into the limiting groove (422). The driving tube (42) is used to drive the movable part (421) to slide towards the distal end until the limiting ridge (33) abuts against the distal end of the limiting groove (422), so that the crushing pieces (43) are deformed and expanded to an outer diameter matching the inner diameter of the blood vessel (6). The driving tube (42) is used to drive the movable part (421) to rotate so that the deformed and expanded crushing pieces (43) are helically deformed. The driving tube (42) is used to drive the movable part (421) to slide towards the proximal end until the limiting ridge (33) abuts against the proximal end of the limiting groove (422), so that the crushing pieces (43) are deformed and contracted to an outer diameter smaller than that of the positioning piece (41).

5. The multi-functional internal fistula thrombectomy device, as recited in claim 1, characterized by, The crushing pieces (43) are divided into groups of crushing groups (44) and arranged in a ring array outside the distal end of the thrombolytic tube (3). The medicine outlets (32) are arranged in a ring array on the outer wall of the distal end of the thrombolytic tube (3). The groups of crushing groups (44) and the medicine outlets (32) are arranged in a circumferential staggered manner.

6. The multi-functional internal fistula thrombectomy device, as recited in claim 5, characterized by, Each group of crushing groups (44) includes at least three crushing pieces (43), and the three crushing pieces (43) in the same group are arranged in a spaced distribution away from the thrombolytic tube (3).

7. The multi-functional internal fistula thrombectomy device of claim 1, wherein, The inner sides of the first tube (1) and the second tube (2) are provided with holes for threading the guide wire (5) in the axial direction.

8. The multi-functional internal fistula thrombectomy device of claim 1, wherein, The first tube (1), the second tube (2), the thrombolytic tube (3), and the driving tube (42) are driven by the corresponding operation handles to move towards the distal end or the proximal end. The driving tube (42) is also driven by the corresponding operation handles to rotate. The first tube (1), the second tube (2), and the thrombolytic tube (3) are connected to the corresponding liquid supply devices.

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