CN216439269U - Vascular opening device - Google Patents
Vascular opening device Download PDFInfo
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- CN216439269U CN216439269U CN202122817580.1U CN202122817580U CN216439269U CN 216439269 U CN216439269 U CN 216439269U CN 202122817580 U CN202122817580 U CN 202122817580U CN 216439269 U CN216439269 U CN 216439269U
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- cutting
- thrombus
- access device
- vascular access
- support
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- 230000002792 vascular Effects 0.000 title claims abstract description 32
- 208000007536 Thrombosis Diseases 0.000 claims abstract description 52
- 238000001914 filtration Methods 0.000 claims abstract description 31
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- 210000003128 head Anatomy 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000013151 thrombectomy Methods 0.000 claims description 6
- 210000005077 saccule Anatomy 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 238000009941 weaving Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 4
- 210000004204 blood vessel Anatomy 0.000 abstract description 20
- 230000017531 blood circulation Effects 0.000 abstract description 10
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- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000013156 embolectomy Methods 0.000 description 2
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- 239000007787 solid Substances 0.000 description 2
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- 206010008092 Cerebral artery thrombosis Diseases 0.000 description 1
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- 238000003698 laser cutting Methods 0.000 description 1
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- 210000003141 lower extremity Anatomy 0.000 description 1
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Abstract
The utility model relates to the technical field of medical instruments and discloses a vascular opening device. It comprises the following steps: taking the thrombus support and the balloon catheter; the thrombus taking stent is a self-expanding stent structure which can be contracted and expanded; the thrombus taking bracket comprises a collecting part and a cutting part which are sequentially connected from the far end to the near end; the far end of the collecting part is closed and the peripheral wall is provided with a plurality of filtering holes; the proximal end of the cutting part is provided with an opening; the distal end of the balloon catheter is connected to the proximal end of the cutting portion. According to the embodiment of the utility model, the balloon catheter and the thrombus taking support are combined, the thrombus is cut and collected by the thrombus taking support after the blood flow passage in the blood vessel is opened by the balloon, the operation is convenient, and the thrombus taking effect is better.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a vascular opening device.
Background
Vascular disease has become the first fatal disease in our country, and vascular embolism has become the main causative factor in vascular disease. Especially, the total annual new diseases of patients suffering from cerebral arterial thrombosis, pulmonary embolism and lower limb venous embolism is over 500 ten thousand.
The interventional thrombus taking device has the advantages of small wound, short postoperative recovery time, few complications after treatment, good operation effect and the like, and can be accepted by patients better. Aiming at the problems that the existing balloon adopted by plaque can only expand stenosis and has the risk of plaque falling, the doctor in the operation needs to prevent the blockage risk of plaque falling by means of a far-end protective umbrella, and the operation is complicated; for the slow and chronic thrombus, the existing direct suction, rheological suction or mechanical thrombus extraction effect is still to be improved.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims to provide a vascular opening device, which solves the problems of complex operation and poor thrombus removal effect of the conventional vascular opening device.
In order to solve the technical problems, the utility model adopts the following technical scheme:
an embodiment of the present invention provides a vascular opening device, including:
a thrombectomy stent, which is a self-expanding stent structure that is collapsible and expandable; the thrombus taking support comprises a collecting part and a cutting part which are sequentially connected from the far end to the near end; the far end of the collecting part is closed, and the peripheral wall of the collecting part is provided with a plurality of filtering holes; the proximal end of the cutting part is provided with an opening; and
a balloon catheter having a distal end connected to the proximal end of the cutting portion.
In addition, the collecting part is tapered, and the collecting part includes: the device comprises an expandable and contractible conical support and a filtering structure which is arranged on the periphery of the conical support in a covering manner; the filter structure peripheral wall has a plurality of filter holes.
Additionally, the tapered stent includes: a plurality of support rods; the far ends of the support rods are converged to form a closed end of the collecting part; the near ends of the support rods are connected to the far end of the cutting part at intervals in the circumferential direction.
In addition, the filter structure includes: the conical filter screen is formed by weaving braided wires; or a membrane filtering structure with a plurality of filtering holes arranged on the peripheral wall.
Additionally, the plurality of filter apertures includes: a plurality of filter hole groups are axially arranged at intervals, and each filter hole group comprises a plurality of filter holes which are circumferentially distributed at intervals; the aperture of the filter hole is gradually increased from the far end to the near end.
In addition, the cutting part is a support structure with a circumferential closed loop; the peripheral wall of the cutting part is provided with a plurality of cutting openings; wherein, the proximal end opening of the cutting part is an ellipse-like cutting opening.
Additionally, the cutting portion comprises a plurality of cutting bars; the near ends of the cutting rods are connected pairwise to form a plurality of connecting ends, and the connecting ends are arranged at intervals in the circumferential direction;
the cutting rods are in forward and reverse spiral structures from the near end to the far end and are connected in a crossed mode to form a circumferential closed-loop support structure;
wherein the plurality of cutting bars comprises two long cutting bars;
the two long cutting rods are spirally wound in forward and reverse directions and are converged and connected at the near end to form the similar-ellipse cutting opening.
In addition, the balloon catheter includes: the inflatable and contractible balloon and a tube body fixedly arranged in the inner cavity of the balloon; the two ends of the tube body extend out of the saccule;
the thrombus removal support also comprises a fixing ring; the cutting part near-end with gu fixed ring links to each other, gu fixed ring cover is located the body distal end.
In addition, the vascular access device further comprises: a ball head guide wire;
the ball head guide wire comprises: the elastic propelling part and the head end are arranged at the far end of the elastic propelling part; the distal end of the collecting part is connected with the proximal end of the elastic propelling part.
In addition, the elastic propelling part is a spring, and the spring is made of stainless steel and/or shape memory metal.
According to the technical scheme, the embodiment of the utility model at least has the following advantages and beneficial effects:
according to the vascular opening device provided by the embodiment of the utility model, the intravascular blood flow path is opened through the balloon catheter, then the thrombus is cut through the cutting part of the thrombus taking support when the vascular opening device is withdrawn, and the broken thrombus is collected through the collecting part of the thrombus taking support, so that the thrombus taking effect is improved. Meanwhile, the collecting part can prevent the broken thrombus from escaping when the blood flow path in the blood vessel is opened by the balloon catheter, the operation is convenient, and the thrombus taking effect is good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, it is understood that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a vascular access device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embolectomy stent of a vascular access device according to an embodiment of the present invention;
fig. 3 is a structural schematic diagram of a stent structure of an embolectomy stent of a vascular access device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
Unless otherwise stated, the proximal and distal ends referred to in the present invention have the same meaning in the orientation, i.e. in the use state, the distal end is the end away from the operator, the proximal end is the end close to the operator, and the operator controls the vascular access device at the proximal end.
Referring to fig. 1-3, a vascular access device according to an embodiment of the present invention may be used with a delivery system to achieve rapid removal of blocking materials such as plaque and thrombus. The vascular opening device of the embodiment of the utility model mainly comprises: a ball head guide wire 1, a thrombus taking support 2 and a balloon catheter 3.
The ball head guide wire 1 is provided with a smooth blunt head end and an elastic retractable bent propelling structure, so that the injury of a blood vessel wall can be effectively prevented in the process of propelling the blood vessel opening device to a thrombus taking position.
The balloon catheter 3 is used to open an intravascular blood flow path. The thrombectomy stent 2 is used for preventing the broken thrombus from escaping to the distal end when the balloon catheter 3 is expanded to open the blood flow passage in the blood vessel, and is used for cutting and collecting the thrombus when the blood vessel opening device is withdrawn, thereby better removing the thrombus.
The ball-end guide wire 1 comprises an elastic propelling part 11 and a head end 12 arranged at the far end of the elastic propelling part 11. The head end 12 can be a smooth and blunt guiding structure such as a sphere, an ellipsoid and the like, which is convenient for pushing in the blood vessel without damaging the blood vessel intima. The elastic propelling part can be a spring, and the elastic propelling part can elastically retract or bend when the head end of the elastic propelling part is subjected to larger resistance in propelling, so that an operator can be reminded to adjust the propelling direction conveniently. The material of the spring may be stainless steel and/or a shape memory metal. That is, the spring may be a spring made of a memory metal, such as nitinol, or a spring made of stainless steel, or a spring made of two or more materials, such as stainless steel and a memory metal, and is not particularly limited herein.
The thrombectomy stent 2 is a self-expanding stent structure that is collapsible and expandable. When the vascular opening device is conveyed to the thrombus taking position, the thrombus taking support 2 is released to the thrombus far end and then expands and supports on the inner wall of the blood vessel by means of the elasticity of the thrombus. The self-expanding property of the thrombectomy stent 2 is the self-expanding property formed by using a memory material.
The thrombectomy stent 2 comprises a collecting part 21, a cutting part 22 and a fixing ring 23 which are connected in sequence from the far end to the near end. The collecting portion 21 is closed at the distal end and connected to the proximal end of the elastic pushing portion 11. The proximal end of the collecting portion 21 is smoothly transitionally connected with the distal end of the cutting portion 22. The peripheral wall of the collecting section 21 has a plurality of filtering holes. The cutting portion 22 has an opening at a proximal end thereof. When the vascular access device is withdrawn, thrombus enters the collecting part 21 through the opening of the cutting part 22, and the filtering holes of the collecting part 21 can pass through the blood flow and intercept and filter the thrombus, so that the thrombus is prevented from escaping to the far end of the blood vessel.
The cutting portion 22 is a circumferentially closed loop stent structure. The cutting portion 22 has a plurality of cutting openings formed in the peripheral wall thereof. The near-end opening of the cutting part is an ellipse-like cutting opening, so that large thrombi can conveniently enter the collecting section 21 through the ellipse-like cutting opening. The cutting openings in the circumferential wall of the cutting portion 22 may cut thrombi, and the cut thrombi may enter the collecting section 21 through the cutting openings.
In particular, the cutting portion 22 may include a plurality of cutting bars. The proximal ends of the plurality of cutting bars are connected two by two to form a plurality of connecting ends 223 which are connected to the proximal end of the collecting section 21. A plurality of link is the circumference interval distribution around the center of getting the bolt support 2. The plurality of cutting rods are in forward and reverse spiral structures from the near end to the far end and are crossed and connected to form a circumferential closed-loop support structure. The peripheral wall of the cutting portion 22 has a plurality of cutting openings formed by intersecting cutting bars.
Wherein, a plurality of cutting poles include two long cutting poles 221, and two long cutting poles 221 are positive and negative two to spiral coiling and assemble at the near-end and connect and form similar oval cutting mouth, and the near-end of two long cutting poles 221 links to each other with solid fixed ring 23, and solid fixed ring 23 links to each other with sacculus pipe 3 near-end. The remaining cutting bars of the plurality of cutting bars may have a length less than the length of the long cutting bars, collectively referred to herein as short cutting bars, such as short cutting bars 222 shown in fig. 3. The near end of the short cutting rod is connected with the short cutting rod or the long cutting rod in pairs to form a connecting end. Each short cutting rod and other cutting rods adjacent to the short cutting rod in the circumferential direction are spirally wound in a forward and reverse direction and are intersected and connected with other cutting rods to form a plurality of cutting openings, the near ends of the short cutting rods can be axially connected to the two long cutting rods at intervals and can also be connected to the other intersected short cutting rods, and specific limitation is not required here. The stent structure which forms a circumferential closed loop by spirally intersecting and connecting a plurality of cutting rods enables the cutting part to be well supported on the inner wall of a blood vessel and provides a larger cutting opening.
In order to increase the number of connection ends, it is convenient for the cutting part 22 to be connected to the collecting part 21. The cutting section further comprises a plurality of V-shaped links 223, the V-shaped links 223 opening towards the proximal end and being connected to the cutting rod, respectively, and the distal ends of the V-shaped links being connected as connecting ends to the collecting section 21.
The collecting portion 21 may be tapered. The tip of the collecting part 21 is connected with the near end of the ball head guide wire. The tapered configuration of the trap portion 21 may facilitate collection of large thrombi at the proximal end of the trap portion. The collecting part 21 may include a conical stent that can expand and contract and a filtering structure 212 that covers the outer circumference of the conical stent, i.e., the filtering structure covers the outer circumferential surface of the conical stent. The peripheral wall of the filter structure 212 has a plurality of filter holes for filtering thrombus.
Specifically, the tapered stent may include: a plurality of support bars 211. The material of the support rod 211 includes, but is not limited to, a memory alloy, such as nitinol. The far ends of the supporting rods 211 are converged to form a closed end of the collecting part 21 and are connected with the near end of the ball guide wire 1, and the far ends of the supporting rods 211 can be fixedly connected to the near end of the elastic pushing part 11 of the ball guide wire 1. The proximal ends of the support rods 211 are circumferentially connected to the distal end of the cutting portion 22 at intervals, that is, the proximal ends of the support rods 211 are connected to the connecting end of the distal end of the cutting portion 22 one by one, and the support rods 211 are substantially straight from the distal end to the proximal end to form a conical support. The proximal end of each support rod 211 may have a smaller curvature to form the largest diameter of the tapered stent, which may facilitate the curved transition of the collecting section 21 with the cutting section 22.
In this embodiment, the filtering structure 212 may include: the peripheral wall is provided with a membrane filtering structure with a plurality of filtering holes. The membrane filtering structure is coated and fixed on the periphery of the conical support to effectively filter thrombus. Materials of membrane filtration structures include, but are not limited to: polyethylene, ultra-high molecular weight polyethylene, polyester, nylon and polyurethane.
The plurality of filtering holes may include: a plurality of filter hole groups are arranged at intervals in the axial direction, and each filter hole group comprises a plurality of filter holes which are distributed at intervals in the circumferential direction. Wherein the aperture of the filtering holes is gradually increased from the far end to the near end. Furthermore, the aperture of the filtering holes of each filtering hole group can be the same, and the number of the filtering holes of each filtering hole group can be the same, which is convenient for the arrangement of the filtering holes. The aperture of the filtering hole at the far end is smaller, so that fine thrombus can be filtered conveniently.
It should be noted that, in some examples, the filtering structure may also be a conical filtering net formed by weaving braided wires, and dense filtering holes may be formed between the braided wires. The shape of the conical filter screen is matched with that of the conical support, and the conical filter screen is coated and fixed on the periphery of the conical support to realize effective interception of the broken bolt. The conical filter screen can be woven by metal wires or formed by weaving.
It should be noted that the cutting portion 22 can be made of a nickel-titanium tube by integrally laser cutting and heat setting. Of course, the cutting portion 22 may be formed by weaving a metal wire, and is not particularly limited.
The balloon catheter 3 may include: an inflatable and deflatable balloon 31 and a tube 32 fixedly arranged in the inner cavity of the balloon 31. Both ends of the tube 31 extend out of the balloon 31. The fixing ring 23 is sleeved on the distal end of the tube body 32, so that the thrombus removal support 2 is connected with the balloon catheter 3.
The balloon catheter 3 is also provided with a fluid passage (not shown) to inject fluid into the balloon 31 or withdraw fluid from the balloon 31, thereby inflating or deflating the balloon 31. The fluid passage of the balloon catheter 3 may be arranged in a manner well known to those skilled in the art and will not be described in further detail herein.
When the balloon 31 of the balloon catheter 3 is inflated, a strong radial expansion force can be provided, so that the blood vessel can be expanded, and blood flow in the blood vessel can be opened. It should be noted that the balloon catheter 3 may adopt a semi-compliant or non-compliant balloon to ensure the inflation performance and safety of the balloon.
Specifically, the balloon 31 of the balloon catheter 3 may have a cylindrical shape, and both ends of the balloon 31 may have a frustum shape when inflated. The barrel diameter between the two ends of the cylindrical balloon 31 may be the same. Alternatively, the diameter of cylindrical balloon 31 may be tapered from the distal end to the proximal end to accommodate the natural shape of the vessel.
With reference to fig. 1, the vascular access device of the embodiment of the present invention has the following application methods and steps:
in the thrombus clearing operation treatment, the blood vessel opening device is delivered to a specified target lesion part along a catheter, after the catheter is withdrawn to release the thrombus taking support 2, the blood vessel opening device is continuously withdrawn until the saccule 31 in the saccule catheter 3 is completely exposed, the saccule catheter 3 is filled for pre-expansion to open blood flow in the blood vessel, then the blood vessel opening device is integrally withdrawn, the thrombus is cut by the thrombus taking support 2 through the large cutting opening of the cutting part 22, the thrombus is intercepted and collected through the dense filtering holes of the collecting part 21, the blood vessel is continuously withdrawn until the blood vessel opening device is completely contained in the catheter, and then the catheter is completely pulled out of the body to clear the thrombus or plaque.
Based on the technical scheme, the embodiment of the utility model at least has the following advantages and positive effects:
according to the vascular opening device provided by the embodiment of the utility model, the intravascular blood flow path is opened through the balloon catheter, then the thrombus is cut through the cutting part of the thrombus taking support when the vascular opening device is withdrawn, and the broken thrombus is collected through the collecting part of the thrombus taking support, so that the thrombus taking effect is improved. Meanwhile, the collecting part can prevent the broken thrombus from escaping when the blood flow path in the blood vessel is opened by the balloon catheter, the operation is convenient, and the thrombus taking effect is good.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the utility model, and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model in practice.
Claims (10)
1. A vascular access device, comprising:
a thrombectomy stent, which is a self-expanding stent structure that is collapsible and expandable; the thrombus taking support comprises a collecting part and a cutting part which are sequentially connected from the far end to the near end; the far end of the collecting part is closed, and the peripheral wall of the collecting part is provided with a plurality of filtering holes; the proximal end of the cutting part is provided with an opening; and
a balloon catheter having a distal end connected to the proximal end of the cutting portion.
2. The vascular access device of claim 1, wherein the collecting portion is tapered, the collecting portion comprising: the device comprises an expandable and contractible conical support and a filtering structure which is arranged on the periphery of the conical support in a covering manner; the filter structure peripheral wall has a plurality of filter holes.
3. The vascular access device of claim 2, wherein the tapered stent comprises: a plurality of support rods; the far ends of the support rods are converged to form a closed end of the collecting part; the near ends of the support rods are connected to the far end of the cutting part at intervals in the circumferential direction.
4. The vascular access device of claim 2, wherein the filter structure comprises: the conical filter screen is formed by weaving braided wires; or a membrane filtering structure with a plurality of filtering holes arranged on the peripheral wall.
5. The vascular access device of claim 2, wherein the plurality of filtering apertures comprises: a plurality of filter hole groups are axially arranged at intervals, and each filter hole group comprises a plurality of filter holes which are circumferentially distributed at intervals; the aperture of the filter hole is gradually increased from the far end to the near end.
6. The vascular access device of claim 1, wherein the cutting portion is a circumferentially closed loop stent structure; the peripheral wall of the cutting part is provided with a plurality of cutting openings; wherein, the proximal end opening of the cutting part is an ellipse-like cutting opening.
7. The vascular access device of claim 6, wherein the cutting portion comprises a plurality of cutting rods; the near ends of the cutting rods are connected pairwise to form a plurality of connecting ends, and the connecting ends are arranged at intervals in the circumferential direction;
the cutting rods are in forward and reverse spiral structures from the near end to the far end and are connected in a crossed mode to form a circumferential closed-loop support structure;
wherein the plurality of cutting bars comprises two long cutting bars;
the two long cutting rods are spirally wound in forward and reverse directions and are converged and connected at the near end to form the similar-ellipse cutting opening.
8. The vascular access device of claim 1, wherein the balloon catheter comprises: the inflatable and contractible balloon and a tube body fixedly arranged in the inner cavity of the balloon; the two ends of the tube body extend out of the saccule;
the thrombus removal support also comprises a fixing ring; the cutting part near-end with gu fixed ring links to each other, gu fixed ring cover is located the body distal end.
9. The vascular access device of claim 1, further comprising: a ball head guide wire;
the ball head guide wire comprises: the elastic propelling part and the head end are arranged at the far end of the elastic propelling part; the distal end of the collecting part is connected with the proximal end of the elastic propelling part.
10. The vascular access device of claim 9, wherein the resilient advancement member is a spring made of stainless steel and/or a shape memory metal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122817580.1U CN216439269U (en) | 2021-11-17 | 2021-11-17 | Vascular opening device |
| PCT/CN2021/138240 WO2023087459A1 (en) | 2021-11-17 | 2021-12-15 | Vascular recanalization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122817580.1U CN216439269U (en) | 2021-11-17 | 2021-11-17 | Vascular opening device |
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| Publication Number | Publication Date |
|---|---|
| CN216439269U true CN216439269U (en) | 2022-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122817580.1U Active CN216439269U (en) | 2021-11-17 | 2021-11-17 | Vascular opening device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116058922A (en) * | 2022-12-26 | 2023-05-05 | 上海心弘生命科学有限公司 | Ultrasonic-assisted thrombolysis device and system |
| CN117224197A (en) * | 2023-11-13 | 2023-12-15 | 泓欣科创(北京)科技有限公司 | Vascular dredging and flushing device and vascular dredging and flushing method |
-
2021
- 2021-11-17 CN CN202122817580.1U patent/CN216439269U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116058922A (en) * | 2022-12-26 | 2023-05-05 | 上海心弘生命科学有限公司 | Ultrasonic-assisted thrombolysis device and system |
| CN116058922B (en) * | 2022-12-26 | 2024-04-30 | 上海心弘生命科学有限公司 | Ultrasonic-assisted thrombolysis device and system |
| CN117224197A (en) * | 2023-11-13 | 2023-12-15 | 泓欣科创(北京)科技有限公司 | Vascular dredging and flushing device and vascular dredging and flushing method |
| CN117224197B (en) * | 2023-11-13 | 2024-02-06 | 泓欣科创(北京)科技有限公司 | Vascular dredging and flushing device and vascular dredging and flushing method |
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