Thrombus extraction support used in neurology surgery

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a thrombectomy stent for neurology surgery, which comprises a first stent body, a second stent body is integrally connected onto the first stent body, the first stent body and the second stent body are net-shaped, and catheters sleeve the first stent body and the second stent body. The first stent body and the second stent body are located in the catheter when stored, an air bag is arranged in the second stent body, an air pipe is arranged on the air bag, the air pipe is located in the first stent body and the catheter and extends out of the catheter to be connected with an injector, and the first stent body, the second stent body and the air bag penetrate through thrombus through the catheter. Then the first stent body, the second stent body and the air bag are released, the injector inflates the air bag through the air pipe, the air bag expands the second stent body, and therefore when thrombus is pulled out of the blood vessel, residues generated when the thrombus is pulled out by the first stent body and the second stent body can be removed, and the thrombus can be thoroughly removed.

Description

Technical Field

[0001] The invention belongs to the technical field of medical appliances, and in particular relates to a thrombectomy bracket used in neurological surgery. Background Art

[0002] Thrombosis is a common disease in neurology. The main causes include hardening of the blood vessel wall to form plaques, local roughness, blood flow forming vortices in rough places, and then forming thrombi, or damage to the arterial endothelium, which will attract platelets to gather here and form thrombi at the damaged site, or patients who are bedridden for a long time or after surgery. Thrombosis in different situations has a great impact on patients, including hemiplegia, hemianopsia, hemisensory disorders, and severe brain hernia leading to death. At present, the main treatment for thrombosis in hospitals is stent thrombectomy, which is a minimally invasive surgery that usually involves cutting a one or two-inch incision on the patient's thigh. A small incision of 1 cm is made, and catheter technology is used to put the catheter into the blood vessel to determine the location of the blood vessel blockage. The thrombectomy stent is placed at the location of the thrombus through a microcatheter. At the same time, precise imaging is used to determine that the stent and the thrombus are integrated, and then the stent is recovered using technology to remove the thrombus from the body, thus saving thousands of lives. However, stent thrombectomy still has defects. After thrombectomy, there are still residual thrombi on the blood vessel walls at the site of embolism. Although the patient's recovery is better, the remaining thrombi are a time bomb that may threaten the patient's life safety at any time. Therefore, the above problems need to be solved urgently, so a thrombectomy stent for use in neurological surgery is proposed. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a thrombectomy stent for use in neurological surgery, which can not only remove the thrombus from the body, but also remove the thrombus remaining on the blood vessel wall.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a thrombectomy stent for use in neurological surgery, comprising a stent body one, a stent body two being integrally connected to the stent body one, the stent body one and the stent body two being in a mesh shape, a catheter being sheathed on the outer side of the stent body one and the stent body two, the stent body one and the stent body two being located in the catheter when stored, an airbag being provided inside the stent body two, a trachea being provided on the airbag, the trachea being located inside the stent body one and the catheter and extending outside the catheter to be connected to a syringe.

[0005] The beneficial effects of the present invention are as follows: the catheter passes the stent body one, the stent body two and the airbag through the thrombus, and then releases the stent body one, the stent body two and the airbag, and the syringe pumps air into the airbag through the trachea, and the airbag expands the stent body two, so that when the thrombus is pulled out of the blood vessel, the residue left by the stent body one when the thrombus is pulled out can be cleared by the stent body two, thereby achieving complete removal of the thrombus.

[0006] To effectively remove blood clots;

[0007] As a further improvement of the above technical solution: the diameter of the airbag in the filled state is larger than the diameter of the stent body in the use state.

[0008] The beneficial effect of this improvement is that after the balloon is inflated, the stent body 2 is expanded so that the diameter of the stent body 2 is larger than the diameter of the stent body 1. Therefore, when the stent body 1 clears the thrombus, the residue on the blood vessel wall will be cleared by the stent body 2, thereby effectively clearing the thrombus.

[0009] To prevent the pressure in the airbag from being too high or too low;

[0010] As a further improvement of the above technical solution: a pressure gauge for detecting the air pressure of the airbag is provided at one end of the trachea close to the syringe.

[0011] The beneficial effects of this improvement are: the pressure gauge detects the pressure in the balloon to prevent excessive pressure from damaging the blood vessels, and to prevent insufficient pressure from expanding the stent body 2 and affecting the removal of residual thrombus.

[0012] In order to prevent the resistance between the thrombus and the blood flow during the thrombus removal process, which may cause the thrombus to be dispersed and leak out from the mesh of the stent body 2;

[0013] As a further improvement of the above technical solution: the mesh of the second bracket body is smaller than the mesh of the first bracket body.

[0014] The beneficial effects of this improvement are: the mesh of the second stent body is smaller and can absorb smaller thrombi. When the thrombi are pulled out of the blood vessel, the direction of pulling the thrombi is opposite to the blood flow, and resistance is generated between the two. The thrombi may be dispersed, and the second stent body can block small thrombi.

[0015] To prevent the blood clot from disintegrating;

[0016] As a further improvement of the above technical solution: a plurality of spoon-shaped plates are provided on the circumferential outer wall of the trachea, and the plurality of spoon-shaped plates are arranged in a staggered manner.

[0017] The beneficial effect of this improvement is that when the thrombus is pulled outward, the spoon-shaped plate blocks the blood flow and prevents the thrombus from being dispersed by the blood flow.

[0018] In order to effectively block the activity of blood clots;

[0019] As a further improvement of the above technical solution: a side of the plurality of spoon-shaped plates away from the airbag is set as a recessed portion.

[0020] The beneficial effect of this improvement is that when the thrombus is pulled outward, the thrombus will enter the recessed portion, blocking the thrombus from flowing in the direction of the second stent body.

[0021] In order to clearly understand the active positions of the bracket body 1 and the bracket body 2;

[0022] As a further improvement of the above technical solution: a developing wire is connected between the second support body and the airbag.

[0023] The beneficial effect of this improvement is that the developing wire is not radiopaque in the contrast agent and has a good developing effect, which allows the doctor to see the situation inside the blood vessel and determine the placement position of the stent body 1 and the stent body 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a front view of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the spoon-shaped plate and the recessed portion of the present invention;

[0027] Figure 4 It is a schematic structural diagram of the developing filament of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the support body 1 and the support body 2 after being stored in the present invention.

[0029] In the figure: 1. support body 1; 2. support body 2; 3. catheter; 4. air bag; 5. trachea; 6. syringe; 7. pressure gauge; 8. spoon-shaped plate; 9. recessed part; 10. developing wire. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0031] like Figure 1-5As shown, a thrombectomy stent for neurological surgery includes a stent body 1, and a stent body 2 is integrally connected to the stent body 1, wherein the stent body 1 and the stent body 2 are nickel-titanium alloy, which is a shape memory metal with good plasticity. The stent body 1 and the stent body 2 are mesh-shaped, and a catheter 3 is sleeved on the outside of the stent body 1 and the stent body 2. When the stent body 1 and the stent body 2 are stored, the stent body 1 and the stent body 2 are located in the catheter 3. An air bag 4 is arranged in the stent body 2, and a trachea 5 is arranged on the air bag 4. The trachea 5 is located in the stent body 1 and the catheter 3 and extends to the outside of the catheter 3 and is connected to a syringe 6. The catheter 3. The stent body 1, the stent body 2 and the airbag 4 are passed through the thrombus, and then the stent body 1, the stent body 2 and the airbag 4 are released. The syringe 6 inflates the airbag 4 through the trachea 5. The airbag 4 expands the stent body 2, so that when the thrombus is pulled out of the blood vessel, the stent body 2 can remove the residue left when the stent body 1 pulls out the thrombus, thereby achieving complete removal of the thrombus. The diameter of the airbag 4 in the filled state is larger than the diameter of the stent body 1 in the use state. After the airbag 4 is filled, it expands the stent body 2, so that the diameter of the stent body 2 is larger than the diameter of the stent body 1. Therefore, when the stent body 1 removes the thrombus, the residue on the blood vessel wall will be removed. The support body 2 is cleared, thereby effectively clearing the thrombus; the end of the trachea 5 close to the syringe 6 is provided with a pressure gauge 7 for detecting the air pressure of the airbag 4, and the pressure gauge 7 detects the pressure in the airbag 4 to prevent excessive pressure from damaging the blood vessel, and prevents insufficient expansion of the support body 2 due to insufficient pressure, thereby affecting the removal of residual thrombus; the mesh of the support body 2 is smaller than the mesh of the support body 1, and the mesh of the support body 2 is smaller, which can absorb smaller thrombus. When the thrombus is pulled out of the blood vessel, the direction of pulling the thrombus is opposite to the blood flow, and resistance is generated between the two, and the thrombus may be dispersed. The support body 2 can block the small thrombus; the circumferential outer wall of the trachea 5 is provided with multiple A spoon-shaped plate 8 is provided, and the plurality of spoon-shaped plates 8 are staggered. When the thrombus is pulled outward, the spoon-shaped plates 8 block the blood flow to prevent the thrombus from being dispersed by the blood flow. A recess 9 is provided on the side of the plurality of spoon-shaped plates 8 away from the airbag 4. When the thrombus is pulled outward, the thrombus will enter the recess 9 to block the thrombus from flowing toward the stent body 2. A developing wire 10 is connected between the stent body 2 and the airbag 4, wherein the developing wire 10 can be made of a radiopaque metal material such as platinum-tungsten alloy, platinum-iridium alloy or tantalum alloy. The developing wire 10 is radiopaque in the contrast agent and has a good developing effect, which allows the doctor to see the situation in the blood vessel and determine the placement position of the stent body 1 and the stent body 2.

[0032] The working principle and use process of the present invention are as follows: when using the device, first make a small incision on the patient's thigh, then insert the catheter 3 into the small incision and enter the blood vessel, then inject contrast agent into the blood vessel, the developing wire 10 at the head end of the catheter 3 determines the position of the catheter 3, then the catheter 3 is passed through the thrombus, and then the catheter 3 is withdrawn, releasing the stent body 2, the stent body 1, the airbag 4 and the trachea 5. The stent body 1 and the stent body 2 are made of nickel-titanium alloy, which is a shape memory metal with good plasticity. When not constrained by the catheter 3, it can expand by itself and then expand toward the blood vessel wall. At this time, the doctor holds the syringe 6 to pump air into the trachea 5, and then fills the airbag 4. The pressure gauge 7 measures the pressure in the airbag 4. Detection is performed to prevent the damage to the blood vessel caused by excessive or insufficient pressure of the airbag 4 and incomplete removal of residual thrombus. The filled airbag 4 expands the stent body 2. Because the diameter of the filled airbag 4 is larger than the diameter of the stent body 1 when in use, the diameter of the stent body 2 when in use is the same as that of the airbag 4 when filled. After waiting for a period of time, when the thrombus is integrated with the stent body 1 and the stent body 2, the thrombus is pulled outward, and the spoon-shaped plate 8 also moves outward of the blood vessel. Part of the thrombus enters the recessed portion 9, and the large thrombus on the stent body 1 is pulled out of the blood vessel, while the stent body 2 moves along the blood vessel wall to remove the residual thrombus that the stent body 1 cannot pull out out of the blood vessel, thereby completely removing the thrombus.

[0033] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A thrombectomy stent for use in neurological surgery, comprising a stent body (1), characterized in that: The support body one (1) is integrally connected with the support body two (2); the support body one (1) and the support body two (2) are in a mesh shape; a catheter (3) is sleeved on the outer side of the support body one (1) and the support body two (2); the support body one (1) and the support body two (2) are located in the catheter (3) when stored; an air bag (4) is arranged inside the support body two (2); a trachea (5) is arranged on the air bag (4); the trachea (5) is located inside the support body one (1) and the catheter (3) and extends to the outside of the catheter (3) and is connected to a syringe (6).

2. The thrombectomy stent for use in neurological surgery according to claim 1, characterized in that: The diameter of the airbag (4) in a filled state is greater than the diameter of the support body (1) in a use state.

3. The thrombectomy stent for use in neurological surgery according to claim 1, characterized in that: A pressure gauge (7) for detecting the air pressure of the air bag (4) is provided at one end of the air tube (5) close to the syringe (6).

4. The thrombectomy stent for use in neurological surgery according to claim 1, characterized in that: The mesh of the second support body (2) is smaller than the mesh of the first support body (1).

5. The thrombectomy stent for use in neurological surgery according to claim 1, characterized in that: A plurality of spoon-shaped plates (8) are provided on the circumferential outer wall of the air pipe (5), and the plurality of spoon-shaped plates (8) are arranged in a staggered manner.

6. The thrombectomy stent for use in neurological surgery according to claim 5, characterized in that: A side of the plurality of spoon-shaped plates (8) away from the airbag (4) is set as a recessed portion (9).

7. The thrombectomy stent for use in neurological surgery according to claim 1, characterized in that: A developing wire (10) is connected between the second support body (2) and the air bag (4).

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