CN117918927A - Winding type thrombus taking device - Google Patents
Winding type thrombus taking device Download PDFInfo
- Publication number
- CN117918927A CN117918927A CN202410325932.7A CN202410325932A CN117918927A CN 117918927 A CN117918927 A CN 117918927A CN 202410325932 A CN202410325932 A CN 202410325932A CN 117918927 A CN117918927 A CN 117918927A
- Authority
- CN
- China
- Prior art keywords
- thrombus taking
- taking support
- thrombus
- support
- guide
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 208000007536 Thrombosis Diseases 0.000 title claims abstract description 112
- 238000004804 winding Methods 0.000 title claims abstract description 24
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 230000003446 memory effect Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 230000002537 thrombolytic effect Effects 0.000 claims description 4
- 239000003146 anticoagulant agent Substances 0.000 claims description 3
- 238000013151 thrombectomy Methods 0.000 claims 5
- 238000000605 extraction Methods 0.000 claims 3
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000004904 shortening Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 230000008901 benefit Effects 0.000 description 3
- 210000004204 blood vessel Anatomy 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000013156 embolectomy Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000002792 vascular Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007917 intracranial administration Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Surgical Instruments (AREA)
Abstract
The invention discloses a winding type thrombus taking device which comprises a pushing tube and a thrombus taking support, wherein the thrombus taking support is formed by winding a planar flexible substrate along a horizontal axis with a fixed winding radius, the flexible substrate is provided with two pairs of endpoints, one of the two pairs of endpoints is a winding starting end and is positioned at the innermost layer of the thrombus taking support, the other pair of endpoints is a winding ending end and is positioned at the outermost layer of the thrombus taking support, the other pair of endpoints respectively form the proximal end and the distal end of the thrombus taking support, the wound thrombus taking support is a spiral cylinder support with the proximal end and the distal end being open, a guide member and a guide shaft are arranged in the thrombus taking support, the proximal end of the guide shaft is slidably arranged in the pushing tube, the distal end of the guide shaft is connected with the guide member, and the guide member is arranged close to the distal end of the thrombus taking support and is used for blocking the distal end of the thrombus taking support and guiding the thrombus taking support to be spirally wound so as to realize the shortening and enlarging or lengthening and reducing, and thus the requirements of clinical safety and effectiveness of the thrombus taking support can be fully met.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a winding type thrombus taking device.
Background
Chinese patent No. 104068911a discloses a vascular embolectomy and embolectomy device, particularly for intracranial vascular embolectomy, which is of a mesh structure, is capable of being switched between a retracted position and an extended position, and is at least partially configured as a coiled structure, thus having the advantages of small volume and good flexibility. In the process of thrombus taking, the CN104068911A is required to block a distal blood vessel of a thrombus taking bracket by using a blocking balloon so as to avoid thrombus escaping phenomenon in the thrombus taking process, and the winding type thrombus taking device increases the flexibility of the thrombus taking device, but additionally increases the component structure of the thrombus taking device by means of the matching of the blocking balloon and the thrombus taking bracket, and simultaneously increases the operation difficulty of doctors, so that the time of the whole thrombus taking operation is prolonged, and the thrombus taking operation difficulty and risk are increased by phase change.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art has the defects and provides a winding type thrombus taking device.
According to the invention, a coiled thrombus taking device is provided, which comprises a push tube and a thrombus taking support, wherein the push tube is connected with the proximal end of the thrombus taking support, the thrombus taking support is formed by coiling a planar flexible substrate along a horizontal axis with a fixed coiling radius, the flexible substrate is provided with four end points and forms two pairs of end points, one of the end points is a coiling starting end and is positioned at the innermost layer of the thrombus taking support, the other end point is a coiling ending end and is positioned at the outermost layer of the thrombus taking support, the other pair of end points respectively form the proximal end and the distal end of the thrombus taking support, the coiled thrombus taking support is a spiral cylinder support with the proximal end and the distal end being open, a guide member and a guide shaft are arranged in the thrombus taking support, the proximal end of the guide shaft is slidably arranged in the push tube, the distal end of the guide shaft is connected with the guide member, and the guide member is close to the distal end of the thrombus taking support, and is used for plugging the distal end of the thrombus taking support and guiding the thrombus taking support to be spirally coiled so as to realize shortening and enlarging or lengthening.
Further, the guide member comprises a plurality of guide rods, the distal ends of the guide rods are fixedly connected with the inner wall of the thrombus taking support, and the proximal ends of the guide rods are biased towards the center of the thrombus taking support and are connected to the distal ends of the guide shafts.
Further, the guide rods are spirally distributed, and the spiral axes of the guide rods are coincident with the central axis of the thrombus taking support.
Further, the plurality of guide rods are all formed into arc rods, and the arc direction of the arc rods is consistent with the winding direction of the flexible matrix.
Further, a film is arranged among the guide rods.
Further, the proximal ends of the guide rods are fixedly connected with a support ring, and the support ring is sleeved at the distal end of the guide shaft and can rotate relative to the guide shaft.
Further, the proximal ends of the plurality of guide rods are fixedly connected to the distal ends of the guide shafts, and the guide shafts can also rotate relative to the pushing tube.
Further, the flexible matrix is diamond-shaped or square-shaped.
Further, the flexible matrix is a metal mesh with shape memory effect, and a plurality of deformable meshes are arranged on the metal mesh.
Further, the flexible matrix comprises a flexible skeleton and a coating film, and the coating film is coated on the flexible skeleton.
Compared with the prior art, the invention realizes the purpose of automatically plugging the distal end of the thrombus taking support by adding the guide member on the basis of the winding thrombus taking support, so that the operation process of doctors is simplified, and the purpose of spirally winding the automatic guide thrombus taking support is realized, thereby being beneficial to smoothly opening the thrombus taking support to capture thrombus and smoothly contracting the thrombus taking support to withdraw from human body, and being capable of fully meeting the clinical requirements on the safety and the effectiveness of the thrombus taking support.
Drawings
The invention will be more fully understood and its attendant advantages and features will be more readily understood by reference to the following detailed description, taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural view of a thrombus-removing holder of a thrombus-removing device according to the first embodiment in a contracted state.
Fig. 2 is a schematic structural view of a thrombus-removing stent of the thrombus-removing device according to the first embodiment in an expanded state.
Fig. 3 is a left side view of the thrombolytic stent of fig. 2.
Fig. 4 is a schematic structural view of a flexible substrate of the thrombus removal device of the first embodiment.
Fig. 5 to 10 are schematic views showing a process of winding the flexible substrate into the thrombus taking-out stand according to the first embodiment.
Fig. 11 is a schematic structural view of a flexible substrate of the thrombus removal device of the second embodiment.
In the accompanying drawings: 1 is a pushing tube, 2 is a thrombus taking support, 3 is a flexible matrix, 4 is a mesh, 5 is a guide member, 6 is a guide shaft, 7 is a guide rod, 8 is a supporting ring, 9 is a flexible framework, and 10 is a coating film.
It should be noted that the drawings are for illustrating the invention and are not to be construed as limiting the invention. Note that the drawings representing structures may not be drawn to scale. Also, in the drawings, the same or similar elements are denoted by the same or similar reference numerals.
Detailed Description
In order that the invention may be more readily understood, a detailed description of the invention is provided below along with specific embodiments and accompanying figures.
The terms "proximal" and "distal" in the sense of the present invention should be understood as meaning, viewed from the direction of the attending physician, the term "proximal" referring to the end proximal to the attending physician, i.e. corresponding to the "left end" referred to with reference to the accompanying drawings, and the term "distal" referring to the end distal to the attending physician, i.e. corresponding to the "right end" referred to with reference to the accompanying drawings.
Embodiment one: the structure of the thrombus removing device of the present embodiment includes a push tube 1 and a thrombus removing holder 2 as shown in fig. 1 to 4. The pushing tube 1 is connected with the proximal end of the thrombus taking support 2, for example, the distal end of the pushing tube 1 is fixedly connected with the proximal end of the thrombus taking support 2, so as to push and retract the thrombus taking support 2.
The thrombus taking support 2 is formed by winding a planar flexible substrate 3 along a horizontal axis with a fixed winding radius, the flexible substrate 3 is diamond-shaped, of course, the flexible substrate 3 is square, the flexible substrate 3 is provided with four endpoints and forms two pairs of endpoints, the two endpoints in each pair of endpoints are oppositely arranged, the connecting line of the two endpoints in one pair of endpoints is intersected with the connecting line of the two endpoints in the other pair of endpoints, one of the endpoints is a winding starting end and is positioned at the innermost layer of the thrombus taking support 2, the other of the endpoints is a winding ending end and is positioned at the outermost layer of the thrombus taking support 2, the other pair of endpoints respectively form the proximal end and the distal end of the thrombus taking support 2, the wound thrombus taking support 2 is a spiral cylinder support with the proximal end and the distal end being opened, and because the flexible substrate 3 is a metal mesh with a shape memory effect, a plurality of deformable meshes 4 are arranged on the metal mesh, and the wound thrombus taking support 2 can self-expand and has a radially contracted state and a radially expanded state.
The thrombus taking support 2 is internally provided with a guide member 5 and a guide shaft 6, the proximal end of the guide shaft 6 is slidably arranged in the pushing tube 1, the distal end of the guide shaft 6 is connected with the guide member 5, for example, the distal end of the guide shaft 6 is rotationally connected with the proximal end of the guide member 5, namely, the guide member 5 is arranged close to the distal end of the thrombus taking support 2, and the guide member 5 is used for blocking the distal end of the thrombus taking support 2 and guiding the thrombus taking support 2 to be spirally wound so as to realize the increase or decrease of shortening. Therefore, according to the embodiment, the guide member 5 is added on the basis of the coiled thrombus taking support 2, so that the purpose of automatically plugging the distal end of the thrombus taking support 2 is realized, the operation process of doctors is simplified, the purpose of spirally coiling the automatic guided thrombus taking support 2 is realized, smooth opening of the thrombus taking support 2 is facilitated, smooth shrinkage of the thrombus taking support 2 is facilitated to withdraw from a human body, the requirements of clinic on the safety and effectiveness of the thrombus taking support can be fully met, and the defect that the distal end of the conventional coiled thrombus taking support cannot be automatically plugged and cannot be coiled in a guiding manner is overcome.
When in winding, as shown in fig. 5 to 10, a spiral cylindrical stent with openings at the proximal end and the distal end is formed after winding around a cylinder by taking one end point of the flexible substrate 3 as a winding starting end. The guide member 5 is close to the distal end setting of drum support, this guide member 5 includes a plurality of guide bars 7, a plurality of guide bars 7 are the wire that has shape memory effect, a plurality of guide bars 7 are the spiral distribution, its spiral axis coincides with the central axis of bolt taking support 2, the distal end of a plurality of guide bars 7 and drum support is the inner wall fixed connection of bolt taking support 2 promptly, the proximal end of a plurality of guide bars 7 is the center of bolt taking support 2 and fixedly connected with supporting ring 8, supporting ring 8 cup joints the distal end at guiding axle 6 and can rotate relative guiding axle 6, and a plurality of guide bars 7 all form the arc pole, the arc direction of arc pole is unanimous with the coiling direction of flexible base member 3, like this can drive guide bar 7 spiral shrink or expansion when bolt taking support 2 shrink or expand, so ensure that bolt taking support 2 spiral rolling in order is in order to realize shrink or expansion, the in-process guiding axle 6 has played the guide effect for the deformation of guide bar 7, do benefit to the guide bar 7 to adaptively produce deformation fast, moreover guide bar 7 also can drive out unordered shrink or expansion through self spiral shrink or expansion, take out or unordered bolt taking support 2 can't avoid. Of course, the proximal ends of the guide rods 7 may also be directly and fixedly connected to the distal ends of the guide shafts 6, and the guide shafts 6 may be configured to rotate relative to the push tube 1, that is, the guide shafts 6 may slide and rotate relative to the push tube 1, so that the guiding effect of the guide shafts 6 on the deformation of the guide rods 7 may be achieved.
In order to improve the blocking effect of the guide member 5 formed by the guide rods 7, a covering film can be arranged between the guide rods 7, namely, an elastic film is connected between the adjacent guide rods 7 to cover the gap formed between the adjacent guide rods 7, thereby effectively preventing thrombus from escaping.
In actual thrombus removal, referring to fig. 1, the thrombus removal stent 2 in a contracted state is firstly conveyed to the distal end of a vascular thrombosis formation part, and the thrombus removal stent 2 is in a minimum contracted state at this time; then the thrombus taking support 2 gradually expands under the self-expansion performance, in the process, the guide member 5 deforms along with the thrombus taking support 2 to guide the thrombus taking support 2 to spirally wind so as to be shortened and become larger, and meanwhile, the thrombus taking support 2 can be supported so that the thrombus taking support 2 is completely opened to be attached to the inner wall of a blood vessel, namely, the expanded state after release shown in fig. 2; then, the pushing tube 1 is pulled along the direction from the far end to the near end, the thrombus taking support 2 is driven to cut thrombus so as to separate the thrombus from the blood vessel wall, and the separated thrombus is collected; finally, the thrombus taking support 2 with thrombus is withdrawn from the human body, and in the process of withdrawing, the thrombus taking support 2 is compressed by external force and then contracts, in the process, the guide member 5 deforms along with the thrombus taking support 2 to guide the thrombus taking support 2 to spirally wind so as to elongate and reduce, and the thrombus taking support 2 is convenient to contract orderly and the volume after contraction is smaller.
Embodiment two: as shown in fig. 11, the difference between the present embodiment and the embodiment is that the structure of the flexible substrate 3 is different, the flexible substrate 3 of the present embodiment includes a flexible skeleton 9 and a covering film 10, the flexible skeleton 9 has elasticity, specifically, a planar structure formed by connecting wires with shape memory effect end to end, and is substantially diamond-shaped, the covering film 10 covers the flexible skeleton 9 and can deform along with the flexible skeleton 9, the covering film 10 is specifically an elastic film with micropores, and the flexible substrate 3 can be formed by covering a layer of elastic film on the planar structure.
Other structures and advantageous effects of the present embodiment are the same as those of the first embodiment, and will not be described here again.
It will be appreciated that although the invention has been described above in terms of preferred embodiments, the above embodiments are not intended to limit the invention. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art without departing from the scope of the technology, or the technology can be modified to be equivalent. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a coiling formula thrombus taking device, including push tube (1) and thrombus taking support (2), push tube (1) and thrombus taking support (2) proximal end hookup, a serial communication port, thrombus taking support (2) are formed by coiling of planar form flexible base member (3) with fixed coiling radius along the horizontal axis, flexible base member (3) have four extreme points and form two pairs of extreme points, one of them is the winding beginning and is located the innermost layer of thrombus taking support (2) for one of them, the other is the winding termination and is located the outermost layer of thrombus taking support (2), the other is the extreme point and forms the proximal end and the distal end of thrombus taking support (2) respectively, make the thrombus taking support (2) that the coiling formed be the spiral cylinder support of proximal end and distal end for opening all, be equipped with guide member (5) and guiding axle (6) in thrombus taking support (2), the proximal end of guiding axle (6) slidably sets up in push tube (1), the distal end and guide member (5) hookup, guide member (5) are close to distal end that guide member (5) set up and are used for realizing the great plug taking support (2) and become the extension of thrombus taking support (2) and become the shutoff of taking support (2) and the extension is become.
2. The thrombectomy device according to claim 1, wherein the guiding member (5) comprises a plurality of guiding rods (7), distal ends of the guiding rods (7) being fixedly connected to an inner wall of the thrombectomy stent (2), proximal ends of the guiding rods (7) being biased towards a center of the thrombectomy stent (2) and coupled to distal ends of the guiding shafts (6).
3. The thrombus extraction device according to claim 2, wherein the plurality of guide bars (7) are spirally distributed, and the spiral axis of the plurality of guide bars (7) coincides with the central axis of the thrombus extraction holder (2).
4. The thrombolysis device according to claim 2, characterized in that the plurality of guide bars (7) are each formed as an arc-shaped bar, the arc-shaped direction of which coincides with the winding direction of the flexible substrate (3).
5. The thrombolytic device according to claim 2, characterized in that a coating is provided between the plurality of guide bars (7).
6. The thrombus taking device according to claim 2, wherein the proximal ends of the plurality of guide rods (7) are fixedly connected with a support ring (8), and the support ring (8) is sleeved at the distal end of the guide shaft (6) and can rotate relative to the guide shaft (6).
7. The thrombectomy device according to claim 2, wherein the proximal ends of the plurality of guide rods (7) are fixedly connected to the distal end of the guide shaft (6), the guide shaft (6) being further rotatable with respect to the push tube (1).
8. The thrombectomy device according to claim 1, wherein the flexible substrate (3) is diamond-shaped or square-shaped.
9. The thrombus extraction device according to claim 1, characterized in that said flexible matrix (3) is a metal mesh with shape memory effect, on which a number of deformable meshes (4) are provided.
10. The thrombolytic device according to claim 1, wherein said flexible matrix (3) comprises a flexible skeleton (9) and a coating (10), the coating (10) being coated on the flexible skeleton (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410325932.7A CN117918927B (en) | 2024-03-21 | 2024-03-21 | Winding type thrombus taking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410325932.7A CN117918927B (en) | 2024-03-21 | 2024-03-21 | Winding type thrombus taking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117918927A true CN117918927A (en) | 2024-04-26 |
| CN117918927B CN117918927B (en) | 2024-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410325932.7A Active CN117918927B (en) | 2024-03-21 | 2024-03-21 | Winding type thrombus taking device |
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| CN (1) | CN117918927B (en) |
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2024
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Also Published As
| Publication number | Publication date |
|---|---|
| CN117918927B (en) | 2024-06-11 |
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