CN115530924A - Thrombus taking device - Google Patents
Thrombus taking device Download PDFInfo
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- CN115530924A CN115530924A CN202211153128.2A CN202211153128A CN115530924A CN 115530924 A CN115530924 A CN 115530924A CN 202211153128 A CN202211153128 A CN 202211153128A CN 115530924 A CN115530924 A CN 115530924A
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- embolectomy
- support part
- thrombectomy
- embolus
- fixedly connected
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- 208000007536 Thrombosis Diseases 0.000 title abstract description 63
- 238000013156 embolectomy Methods 0.000 claims abstract description 121
- 208000005189 Embolism Diseases 0.000 claims abstract description 70
- 238000013151 thrombectomy Methods 0.000 claims abstract description 38
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 210000004204 blood vessel Anatomy 0.000 description 36
- 238000010586 diagram Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 206010014522 Embolism venous Diseases 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 208000004043 venous thromboembolism Diseases 0.000 description 4
- 230000003073 embolic effect Effects 0.000 description 3
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- 239000003146 anticoagulant agent Substances 0.000 description 2
- 229940127219 anticoagulant drug Drugs 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 2
- 230000001684 chronic effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000010102 embolization Effects 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 208000019553 vascular disease Diseases 0.000 description 2
- 208000004476 Acute Coronary Syndrome Diseases 0.000 description 1
- 206010051055 Deep vein thrombosis Diseases 0.000 description 1
- 206010014513 Embolism arterial Diseases 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 208000006011 Stroke Diseases 0.000 description 1
- 206010047249 Venous thrombosis Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 230000002685 pulmonary effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 210000005166 vasculature Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22001—Angioplasty, e.g. PCTA
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22079—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with suction of debris
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
- A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop
Abstract
An embodiment of the present specification provides a thrombus removal device, including: the conveying mechanism comprises a first conveying conduit, a second conveying conduit and a third conveying conduit which are coaxially arranged from inside to outside; the thrombectomy support comprises a first thrombectomy support part and a second thrombectomy support part, wherein the first thrombectomy support part and the second thrombectomy support part are different in shape, and the first thrombectomy support part and the second thrombectomy support part are different in shape, wherein: the first embolectomy support part is formed by cutting shape memory alloy and is suitable for taking out hardened embolus, the first end of the first embolectomy support part is fixedly connected with the first conveying conduit, and the second end of the first embolectomy support part is fixedly connected with the second conveying conduit; the second embolectomy support part is woven by shape memory alloy wires and is suitable for taking out flexible embolisms, the first end of the second embolectomy support part is fixedly connected with the second conveying conduit, and the second end of the second embolectomy support part is fixedly connected with the third conveying conduit. By adopting the scheme, various types of emboli can be effectively taken out, and the emboli can be more thoroughly removed.
Description
Technical Field
The embodiment of the specification relates to the technical field of medical instruments, in particular to a thrombus removal device.
Background
Pulmonary arterial Embolism (PE) and deep Venous thrombosis (PE) are collectively referred to as Venous Thromboembolism (VTE). Among vascular diseases, the incidence of VTE is second only to acute coronary syndrome and stroke, the third most common vascular disease. Due to the lack of specific clinical manifestations, misdiagnosis and missed diagnosis rates are high, which are now important causes of death of people.
Currently, anticoagulant therapy is the cornerstone of treating venous thromboembolism.
However, simple anticoagulant therapy is not ideal for the treatment of some high and moderate risk patients. In order to improve the treatment effect and reduce the treatment trauma and complications, the prior art proposes a stent embolectomy treatment mode, but the existing stent embolectomy system usually has a good effect only for one type of thrombus, and has a poor effect for other types of thrombus.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a embolectomy system in the prior art, the embolectomy system comprises a conveying device 1 and a embolectomy support 2, the conveying device 1 comprises a conveying outer tube 101 and a support fixing tube 102 which are coaxially arranged from outside to inside, the distal end of the support fixing tube 102 is fixed with at least one embolectomy support 2, and the distal end of the support fixing tube 102 is provided with a head end guide cap 103, wherein the embolectomy support 2 is made of a cylindrical woven wire frame with a shape memory effect, the distal end opening of the cylindrical woven wire frame is outwards rolled and heat-treated for shaping, the outwards rolled embolectomy support can be in close contact with the inner wall of a blood vessel, and emboli are collected in the curled space of the embolectomy support 2 after being scraped.
However, in the above system, since the cylindrical woven net frame is likely to be shortened and the radial supporting force is weak, the chronic embolus strongly adhered to the blood vessel wall cannot be taken out efficiently.
Based on the above problems, how to remove different types of emboli in one intervention operation so that the emboli can be removed more completely needs to be solved by the technical personnel in the field.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide an embolectomy device, which can effectively remove multiple types of emboli, and more thoroughly remove the emboli.
An embodiment of the present specification provides a thrombus removal device, including:
the conveying mechanism comprises a first conveying conduit, a second conveying conduit and a third conveying conduit which are coaxially arranged from inside to outside;
the thrombectomy support comprises a first thrombectomy support part and a second thrombectomy support part, wherein the first thrombectomy support part and the second thrombectomy support part are different in shape, and the first thrombectomy support part and the second thrombectomy support part are different in shape, wherein:
the first embolectomy bracket part is formed by cutting shape memory alloy and is suitable for taking out hardened emboli, the first end of the first embolectomy bracket part is fixedly connected with the first conveying conduit, and the second end of the first embolectomy bracket part is fixedly connected with the second conveying conduit;
the second embolectomy support part is woven by shape memory alloy wires and is suitable for taking out flexible embolisms, the first end of the second embolectomy support part is fixedly connected with the second conveying conduit, and the second end of the second embolectomy support part is fixedly connected with the third conveying conduit.
Optionally, the relative positions of the first delivery catheter, the second delivery catheter and the third delivery catheter are adjustable, and the first delivery catheter, the second delivery catheter and the third delivery catheter are suitable for adjusting the shape of the embolectomy stent.
Optionally, the first embolectomy support part is of a spherical hollow structure, the distal end of the first embolectomy support part is fixedly connected with the first conveying catheter, and the proximal end of the first embolectomy support part is fixedly connected with the second conveying catheter.
Optionally, the spherical hollow structure includes: a first spherical region near the distal end and a second spherical region near the proximal end, wherein: the mesh density of the first spherical area is greater than the mesh density of the second spherical area.
Optionally, the first embolectomy support part is a basket hollow structure, and includes an opening structure facing the proximal end and a sac-like structure near the distal end, the distal end of the first embolectomy support part is fixedly connected with the first delivery catheter, and the proximal end of the first embolectomy support part is fixedly connected with the second delivery catheter.
Optionally, the second embolectomy support portion comprises:
a plurality of disc-shaped mesh structures adapted to hold emboli;
and the accommodating cavity is formed between the adjacent disc-shaped net structures and is suitable for accommodating the embolus.
Optionally, the second embolectomy support portion comprises:
a plurality of helical projections adapted to grip the embolus;
and the accommodating cavity is formed between the adjacent spiral line bulges and is suitable for accommodating the embolus.
Optionally, the embolectomy device further comprises: a sheath and a sheath base, wherein:
the sheath tube is coaxial with the first conveying catheter, the second conveying catheter and the third conveying catheter, is arranged on the outermost layer and is suitable for accommodating the embolus;
the sheath tube seat is fixedly connected with the sheath tube and is provided with a connecting tube and a connector.
Optionally, the thrombus removal device further comprises: and the first end of the peripheral interface is connected with the connecting pipe, and the second end of the peripheral interface is suitable for being connected with an external auxiliary suction device.
Optionally, the external auxiliary suction device comprises any one of:
an injector;
a suction device.
Optionally, the sheath is further adapted to receive the first and/or second embolectomy support portions.
The thrombus taking device comprises a conveying mechanism and a thrombus taking support, wherein the conveying mechanism comprises a first conveying conduit, a second conveying conduit and a third conveying conduit which are coaxially arranged from inside to outside, the thrombus taking support comprises a first thrombus taking support part and a second thrombus taking support part, the first thrombus taking support part and the second thrombus taking support part are different in shape, and the first thrombus taking support part is formed by cutting shape memory alloy and has good radial supporting force, so that the first thrombus taking support part is suitable for taking out hardened embolus, and the second thrombus taking support part is formed by weaving shape memory alloy wires and has good flexibility, so that the thrombus taking device is suitable for taking out flexible embolus, and different types of embolus can be taken out by the thrombus taking device in one intervention operation, so that the embolus can be more thoroughly removed.
Furthermore, the relative positions of the first conveying catheter, the second conveying catheter and the third conveying catheter are adjustable, so that the form of the thrombus extraction stent can be adjusted by changing the relative positions of the first conveying catheter, the second conveying catheter and the third conveying catheter, the thrombus extraction stent can be better adapted to the forms of different blood vessels clinically, and the damage to the blood vessel wall is reduced.
Further, can set up first thrombectomy support portion and be spherical hollow out construction, only need adjust spherical hollow out construction's diameter and can make the form of thrombectomy support matches with the form of blood vessel, is convenient for adjust the form of thrombectomy support consequently.
Further, the spherical hollow structure includes: the first spherical area close to the far end and the second spherical area close to the near end can prevent fine thrombus from escaping from the embolectomy device by setting the mesh density of the first spherical area to be greater than that of the second spherical area, thereby more thoroughly removing embolus.
Further, the second embolectomy support portion comprises a plurality of disc-shaped mesh structures which can be in sufficient contact with the embolus and are suitable for clamping the embolus, and the accommodating cavities formed between the adjacent disc-shaped mesh structures are suitable for accommodating the embolus, so that the embolus can be taken out under the condition of keeping the embolus intact, and the risk that the formed fine embolus escapes from the embolectomy support along with blood flow due to thrombus cutting is reduced.
Further, the second embolectomy support portion can include a plurality of helix bulges, and it can fully contact with the embolus, is suitable for centre gripping embolus, and because the holding chamber that forms between the adjacent helix bulges is suitable for the holding the embolus, consequently can further keep the integrality of embolus, avoid leading to the formation of fine crushing embolus because of the cutting thrombus, ensure that the embolus is clear away more thoroughly.
Further, the thrombus removal device can further comprise: the sheath tube is coaxial with the first conveying catheter, the second conveying catheter and the third conveying catheter, is arranged on the outermost layer and is suitable for containing the embolus; the sheath tube seat is fixedly connected with the sheath tube and is provided with a connecting tube and a connector. Based on this, on one hand, the clearing effect of the embolus can be improved by collecting the embolus into the sheath; on the other hand, the thrombus removal device can be connected with external equipment through the connecting pipe on the sheath pipe seat, so that the flexibility of the thrombus removal device can be improved.
Furthermore, the thrombus removal device can also comprise an external interface, the first end of the thrombus removal device is connected with the connecting pipe, the second end of the thrombus removal device is suitable for being connected with external auxiliary suction equipment, and due to the existence of the external interface, the thrombus removal device can be connected with the external equipment according to actual requirements, so that the flexibility of the thrombus removal device is improved, and the thrombus removal effect is further improved.
Further, the external auxiliary suction device can adopt a syringe or a suction device, and the syringe or the suction device can assist in sucking the embolus, so that the embolus removing effect can be further improved.
Furthermore, the sheath is also suitable for accommodating the first embolectomy support part and/or the second embolectomy support part, and when only one type of embolus exists in a blood vessel, the embolus removal can be completed only by the embolus removal support matched with the type of the embolus.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 shows a schematic diagram of a prior art bolt removal system;
FIG. 2 is a schematic structural diagram of a thrombus removal device in an embodiment of the present disclosure;
FIG. 3 is a schematic diagram illustrating a configuration adjustment of an embolectomy support of an embodiment of the present disclosure;
FIG. 4 is a schematic view showing the configuration adjustment of another thrombectomy support according to the embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating an embolic removal process in an embodiment of the present disclosure;
FIG. 6 is a schematic view of a first embolic support portion in an embodiment of the present disclosure;
FIGS. 7-8 are schematic diagrams illustrating another embolic cleaning process in embodiments of the present disclosure;
fig. 9 shows a schematic structural view of a second thrombectomy support portion according to an embodiment of the present disclosure.
Detailed Description
As described in the background art, in the thrombus removal system in the prior art, because the cylindrical woven net rack is easy to shorten and has weak radial supporting force, the chronic thrombus materials firmly bonded with the blood vessel wall cannot be effectively removed, and the thrombus materials are not thoroughly removed.
In order to solve the above problems, an embodiment of the present specification provides a embolectomy device, including a conveying mechanism and a embolectomy support, where the embolectomy support includes a first embolectomy support portion and a second embolectomy support portion, and the first embolectomy support portion is cut from a shape memory alloy and has a good radial supporting force, so that it is suitable for taking out hardened emboli, and the second embolectomy support portion is woven from a shape memory alloy wire and has a good flexibility, so that it is suitable for taking out flexible emboli, and thus the embolectomy device can take out different types of emboli in one intervention operation, so as to more thoroughly remove emboli.
So that those skilled in the art can more clearly understand and practice the embodiments of the present disclosure, the conception, scheme, principle and advantages of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
For ease of description, the following description uses the terms "proximal" and "distal", where "proximal" refers to the end of the emboli removal process that is closer to the operator and "distal" refers to the end of the emboli removal process that is further from the operator.
It should be noted that the embodiments herein illustrate an embolectomy device employing the concepts of the present invention in a form suitable for removing emboli within a human vasculature. It will be appreciated that the device of the present invention is not limited to use in removing emboli from the human vascular system. The type of the embolus is not particularly limited in the embodiments of the present specification, and the embolus may include: thrombus, and/or other substances such as plaque, tumor, fat, etc.
First, the present specification provides a thrombus removal device, and referring to a schematic structural diagram of a thrombus removal device shown in fig. 2, the thrombus removal device M0 includes:
the conveying mechanism M1 includes a first conveying conduit M11, a second conveying conduit M12 and a third conveying conduit M13, which are coaxially arranged from inside to outside.
Thrombectomy support M2, including first thrombectomy support portion M21 and second thrombectomy support portion M22, first thrombectomy support portion M21 and second thrombectomy support portion M22's shape is different, wherein:
the first embolectomy support part M21 is formed by cutting shape memory alloy and is suitable for taking out hardened emboli, the first end of the first embolectomy support part M21 is fixedly connected with the first conveying conduit M11, and the second end of the first embolectomy support part M is fixedly connected with the second conveying conduit M12;
the second embolectomy support part M22 is woven from a shape memory alloy wire, is suitable for removing a flexible embolus, and has a first end fixedly connected to the second delivery catheter M12 and a second end fixedly connected to the third delivery catheter M13.
With the above embodiment, the first delivery catheter M11, the second delivery catheter M12 and the third delivery catheter M13 are used to fix the first thrombectomy support portion M21 and the second thrombectomy support portion M22, and since the first thrombectomy support portion M21 is formed by cutting shape memory alloy and has good radial support force, it can take out hardened embolus, and since the second thrombectomy support portion M22 is formed by weaving shape memory alloy wires and has good flexibility, it can take out flexible embolus, it is possible for the thrombectomy device M0 to take out embolus of different types in one interventional operation, thereby being able to more thoroughly remove embolus.
Clinically, different blood vessels usually have different morphologies, and if the morphologies of the first and second stent sections M21 and M22 do not match the morphology of the blood vessel, a large irritation may be generated to the blood vessel, resulting in damage to the blood vessel.
In order to solve the above problems, in a specific implementation, the relative positions of the first delivery catheter M11, the second delivery catheter M12 and the third delivery catheter M13 may be adjustable, so that the shapes of the first thrombus removal stent unit M21 and the second thrombus removal stent unit M22 may be adjusted by changing the relative positions of the first delivery catheter M11, the second delivery catheter M12 and the third delivery catheter M13, so that the thrombus removal stent unit may be better adapted to different blood vessel shapes, and damage to the blood vessel may be reduced.
As a specific example, referring to a schematic diagram of the form adjustment of the embolectomy stent shown in fig. 3, fig. 3 shows the form adjustment of the first embolectomy stent portion M21, wherein a first end of the first embolectomy stent portion M21 is fixedly connected with the first conveying conduit M11, and a second end is fixedly connected with the second conveying conduit M12, so that the form adjustment of the first embolectomy stent portion M21 can be realized by changing the relative positions of the first conveying conduit M11 and the second conveying conduit M12. For example, the first delivery catheter M11 may be pushed distally relative to the second delivery catheter M12 while maintaining the position of the second delivery catheter M12, and the first end of the first embolectomy stent portion M21 is fixedly connected to the first delivery catheter M11, so that the first embolectomy stent portion M21 may be pulled distally by the first delivery catheter M11, and its diameter is correspondingly reduced, thereby being adapted to a smaller diameter blood vessel.
It is understood that, in the specific implementation, when the form of the first embolectomy support portion M21 is adjusted, the form of the first embolectomy support portion M21 may be adjusted by adjusting the position of the second delivery catheter M12 relative to the first delivery catheter M11 while keeping the position of the first delivery catheter M11 unchanged, or the relative positions of the first delivery catheter M11 and the second delivery catheter M12 may be adjusted at the same time, and the embodiment of the present specification is not limited to a specific adjustment mode.
As another specific example, referring to another schematic form adjustment diagram of the embolectomy stent shown in fig. 4, fig. 4 shows the form adjustment of the second embolectomy stent portion M22, wherein a first end of the second embolectomy stent portion M22 is fixedly connected to the second delivery catheter M12, and a second end thereof is fixedly connected to the third delivery catheter M13, so that the form adjustment of the second embolectomy stent portion M22 can be achieved by changing the relative positions of the second delivery catheter M12 and the third delivery catheter M13. For example, the second delivery catheter M12 may be pushed in the distal direction with respect to the third delivery catheter M13 while keeping the position of the third delivery catheter M13 unchanged, and the first end of the second embolectomy stent portion M22 is fixedly connected to the second delivery catheter M12, so that the second embolectomy stent portion M22 may be pulled in the distal direction by the second delivery catheter M12, and its diameter is correspondingly reduced, thereby being adapted to a smaller diameter blood vessel.
It is understood that, in the specific implementation, when the form of the second embolectomy support portion M22 is adjusted, the form of the second embolectomy support portion M22 may be adjusted by adjusting the position of the third delivery catheter M13 relative to the second delivery catheter M12 while keeping the position of the second delivery catheter M12 unchanged, or the relative positions of the second delivery catheter M12 and the third delivery catheter M13 may be adjusted at the same time, and the embodiment of the present specification is not limited to a specific adjustment mode.
In a specific implementation, by adjusting the relative positions of the first delivery catheter M11, the second delivery catheter M12 and the third delivery catheter M13, not only the diameters of the first and second embolization stent portions M21 and M22 can be reduced to adapt to a smaller diameter blood vessel, but also the diameters of the first and second embolization stent portions M21 and M22 can be increased to adapt to a larger diameter blood vessel.
Clinically, emboli in a blood vessel can contain multiple types of emboli or only contain a single type of emboli, and in order to reduce damage to the blood vessel, in a specific implementation, when only one type of emboli exists in the blood vessel, only a thrombus removal support matched with the type of the emboli is needed to complete emboli removal. For example, when only hardened emboli exist in the blood vessel, the diameter of the second embolectomy stent part M22 can be adjusted to be minimum by adjusting the relative positions of the second delivery catheter M12 and the third delivery catheter M13, and the emboli extraction operation can be performed only through the first embolectomy stent part M21, so as to avoid the irritation of the second embolectomy stent part M22 to the blood vessel and reduce the damage to the blood vessel.
Clinically, emboli are also different in shape, and by adjusting the relative positions of the first delivery catheter M11, the second delivery catheter M12 and the third delivery catheter M13, the shapes of the first embolectomy support portion M21 and the second embolectomy support portion M22 can be more favorable for maintaining the integrity of emboli, so that emboli can be more thoroughly removed.
In some embodiments of the present invention, with continued reference to fig. 2, the first embolectomy support portion M21 may be a spherical hollow structure, the distal end of which is fixedly connected to the first delivery catheter M11, and the proximal end of which is fixedly connected to the second delivery catheter M12.
In specific implementation, referring to a schematic diagram of an embolectomy procedure shown in fig. 5, the embolectomy device M0 is accessed into a blood vessel to a desired position through a minimally invasive interventional operation, the first embolectomy stent portion M21 is deployed at an embolectomy position, and the configuration of the first embolectomy stent portion M21 is adjusted to match the diameter of the blood vessel (for a detailed example of adjusting the configuration of the first embolectomy stent portion M21, refer to the foregoing embodiments, and will not be described herein). Since the first thrombus removal stent section M21 is cut from the shape memory alloy, and has a good radial support force, it is possible to peel off the thrombus material hardened and adhered to the blood vessel wall, and then withdraw the first delivery catheter M11 and the second delivery catheter M12 in the proximal direction to remove the thrombus material.
In some embodiments of the present invention, with continued reference to fig. 5, the spherical cutout structure comprises: a first spherical area M211 near the distal end and a second spherical area M212 near the proximal end, wherein the mesh density of the first spherical area M211 is set to be greater than that of the second spherical area M212 in order to prevent fine thrombi from escaping from the thrombectomy device M0. When some fine emboli escape in the distal direction, the fine emboli can be effectively blocked due to the larger mesh density of the first spherical region M211, so that the emboli in the blood vessel can be more thoroughly removed.
In other embodiments of the present invention, referring to a schematic structural view of a first embolectomy supporting frame portion shown in fig. 6, the first embolectomy supporting frame portion may also be a basket hollow structure S1, which includes an opening structure S12 facing to a proximal end and a sac structure S11 near to a distal end, the distal end of the first embolectomy supporting frame portion is fixedly connected to the first delivery conduit M11, the mesh density is high, so as to effectively prevent fine emboli from escaping in a distal direction, and the proximal end of the first embolectomy supporting frame portion is fixedly connected to the second delivery conduit M12.
It will be appreciated that the embodiments of the present disclosure are not limited to the specific configuration of the first stent section, as long as it has good radial support to remove emboli that have hardened and adhered to the vessel wall.
In a specific implementation, with continued reference to fig. 2, the second embolectomy support portion M22 may include a plurality of disc-shaped mesh structures (e.g., disc-shaped mesh structure M22-1 through disc-shaped mesh structure M22-3), and a housing cavity formed between adjacent disc-shaped mesh structures (e.g., housing cavity MH1 formed between disc-shaped mesh structures M22-1 and M22-2), wherein any one of the plurality of disc-shaped mesh structures is adapted to retain an embolus; the accommodating cavity is suitable for accommodating the embolus.
In an implementation, referring to another schematic diagram of an embolectomy procedure shown in fig. 7 to 8, the embolectomy device M0 is accessed into a blood vessel through a minimally invasive interventional operation to reach a desired position, the second embolectomy stent portion M22 is deployed at an embolectomy position, the shape of the second embolectomy stent portion M22 is adjusted to match the diameter of the blood vessel with the size of the blood vessel (for a detailed example of adjusting the shape of the second embolectomy stent portion M22, see the previous embodiment, which is not described herein), the second embolectomy stent portion M22 is allowed to stand in the blood vessel for a period of time to be attached to an embolus in sufficient contact therewith, and then the second delivery catheter M12 and the third delivery catheter M13 are withdrawn in a proximal direction to remove the embolus. Because the second thrombus taking support part M22 is formed by weaving shape memory alloy wires and has good flexibility, the integrity of the thrombus can be kept in the process of taking out the thrombus, and the risk that the fine-crushed thrombus formed by cutting the thrombus escapes from the thrombus taking support along with blood flow is reduced, so that the thrombus can be more thoroughly removed.
In other embodiments of the present invention, referring to a schematic structural diagram of a second thrombus-taking support portion shown in fig. 9, the second thrombus-taking support portion may also adopt a spiral support S2, and the spiral support S2 includes a plurality of spiral protrusions (e.g., spiral protrusion S2-1 to spiral protrusion S2-6), and accommodating cavities (e.g., accommodating cavity SH 1-accommodating cavity SH 5) formed between adjacent spiral protrusions. Any one of the spiral line bulges is suitable for clamping embolus, and any one of the accommodating cavities is suitable for accommodating the embolus. The spiral structure can further keep the integrity of the embolus, avoid the formation of fine embolus caused by cutting thrombus and ensure that the embolus is removed more thoroughly.
In a specific implementation, with continued reference to fig. 8, the embolectomy device M0 may further include a sheath M3 and a sheath seat M4, wherein:
the sheath M3 is coaxial with the first delivery catheter M11, the second delivery catheter M12, and the third delivery catheter M13, is disposed at the outermost layer, and is adapted to receive the embolus.
The sheath tube seat M4 is fixedly connected with the sheath tube M3 and is provided with a connecting tube M41 and a connector M42.
After the embolus is stripped by the first and second embolectomy support portions M21 and M22, the embolus may be deformed or even broken by pressure during the process of being taken out, and the broken embolus may escape in the distal direction, resulting in embolus residue.
By adopting the embodiment, on one hand, the stripped embolus is collected into the sheath tube M3 and then taken out, and the embolus can be effectively prevented from being deformed or cracked under the action of pressure, so that the clearing effect of the embolus can be improved, on the other hand, the embolus taking device M0 can be connected with external equipment through the connecting tube M41 on the sheath tube seat M4, and the flexibility of the embolus taking device M0 is improved.
In a specific implementation, with continued reference to fig. 8, the thrombus removal device M0 may further include an external interface M5, a first end of which is connected to the connecting pipe M41, and a second end of which is adapted to be connected to an external auxiliary suction device, and the thrombus removal device M0 may be connected to an external device through the external interface M5 according to actual requirements, so as to improve flexibility of the thrombus removal device, and facilitate further improvement of the thrombus removal effect.
In some embodiments of the present invention, the external auxiliary suction device may adopt a syringe or a suction device, and the syringe or the suction device can assist in sucking the embolus, so as to further improve the removal effect of the embolus.
In an implementation, with continued reference to fig. 5, in order to further reduce the damage to the blood vessel, the sheath M3 is further adapted to accommodate the first and/or second embolectomy stent portions M21 and M22, when there is only one type of embolus in the blood vessel, for example, when there is only a hardened embolus in the blood vessel, the second embolectomy stent portion M22 can be placed in the sheath M3 by adjusting the relative positions of the second delivery catheter M12 and the third delivery catheter M13, and the embolus extraction operation can be performed only through the first embolectomy stent portion M21, so that the irritation to the blood vessel by the second embolectomy stent portion M22 can be avoided, the damage to the blood vessel can be further reduced, and the postoperative recovery of the patient can be facilitated.
It will be appreciated that in the embodiments of the present description, the location of the first and second stent sections on the delivery mechanism is not essential, for example, the second stent section may be located at the distal end while the first stent section is located at the proximal end.
Although the embodiments of the present specification are disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (11)
1. A thrombectomy device, comprising:
the conveying mechanism comprises a first conveying conduit, a second conveying conduit and a third conveying conduit which are coaxially arranged from inside to outside;
the thrombectomy support comprises a first thrombectomy support part and a second thrombectomy support part, wherein the first thrombectomy support part and the second thrombectomy support part are different in shape, and the first thrombectomy support part and the second thrombectomy support part are different in shape, wherein:
the first embolectomy bracket part is formed by cutting shape memory alloy and is suitable for taking out hardened emboli, the first end of the first embolectomy bracket part is fixedly connected with the first conveying conduit, and the second end of the first embolectomy bracket part is fixedly connected with the second conveying conduit;
the second embolectomy support part is woven by shape memory alloy wires and is suitable for taking out flexible embolisms, the first end of the second embolectomy support part is fixedly connected with the second conveying conduit, and the second end of the second embolectomy support part is fixedly connected with the third conveying conduit.
2. The embolectomy device of claim 1, wherein the relative positions of the first, second, and third delivery catheters are adjustable and adapted to adjust the configuration of the embolectomy stent.
3. The embolectomy device of claim 2, wherein the first embolectomy support portion is a spherical hollow structure, and has a distal end fixedly connected to the first delivery catheter and a proximal end fixedly connected to the second delivery catheter.
4. The embolectomy device of claim 3, wherein the spherical hollowed-out structure comprises: a first spherical region near the distal end and a second spherical region near the proximal end, wherein: the mesh density of the first spherical area is greater than the mesh density of the second spherical area.
5. The embolectomy device of claim 2, wherein the first embolectomy support portion is a basket-like hollow structure comprising a proximally-facing open structure and a balloon-like structure proximal to a distal end, the distal end being fixedly attached to the first delivery catheter and the proximal end being fixedly attached to the second delivery catheter.
6. The embolectomy device of claim 2, wherein the second embolectomy support portion comprises:
a plurality of disc-shaped mesh structures adapted to hold emboli;
and the accommodating cavity is formed between the adjacent disc-shaped net structures and is suitable for accommodating the embolus.
7. The embolectomy device of claim 2, wherein the second embolectomy support portion comprises:
a plurality of helical projections adapted to grip the embolus;
and the accommodating cavity is formed between the adjacent spiral line bulges and is suitable for accommodating the embolus.
8. The embolectomy device of claim 1, further comprising: a sheath and a sheath base, wherein:
the sheath tube is coaxial with the first conveying catheter, the second conveying catheter and the third conveying catheter, is arranged on the outermost layer and is suitable for accommodating the embolus;
the sheath tube seat is fixedly connected with the sheath tube and is provided with a connecting tube and a connector.
9. The embolectomy device of claim 8, further comprising: and the first end of the peripheral interface is connected with the connecting pipe, and the second end of the peripheral interface is suitable for being connected with an external auxiliary suction device.
10. The embolectomy device of claim 9, wherein the external auxiliary suction device comprises any one of:
an injector;
and (4) a suction device.
11. The embolectomy device of claim 10, wherein the sheath is further adapted to receive the first and/or second embolectomy support portions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211153128.2A CN115530924A (en) | 2022-09-21 | 2022-09-21 | Thrombus taking device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211153128.2A CN115530924A (en) | 2022-09-21 | 2022-09-21 | Thrombus taking device |
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| CN115530924A true CN115530924A (en) | 2022-12-30 |
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| CN202211153128.2A Pending CN115530924A (en) | 2022-09-21 | 2022-09-21 | Thrombus taking device |
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