CN211749877U - Thrombectomy support device with near-end protection and far-end protection functions - Google Patents
Thrombectomy support device with near-end protection and far-end protection functions Download PDFInfo
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- CN211749877U CN211749877U CN202020153872.2U CN202020153872U CN211749877U CN 211749877 U CN211749877 U CN 211749877U CN 202020153872 U CN202020153872 U CN 202020153872U CN 211749877 U CN211749877 U CN 211749877U
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Abstract
The invention discloses a thrombus taking support device with functions of near-end protection and far-end protection, which comprises an outer sheath tube, a push rod, a near-end protection device, a thrombus taking support and a far-end protection device, wherein the push rod is connected with the outer sheath tube; the thrombus filter has the beneficial effects that in the thrombus taking process, the far-end protection device can filter blood clots or atherosclerotic plaques flowing along the blood flow direction, so that small thrombi or plaques are effectively prevented from continuously entering blood vessels; when the thrombus is withdrawn after the thrombus is caught, the thrombus caught on the thrombus taking support and the stent can be completely contained by the near-end protection device, so that the possibility of falling of the thrombus or plaque when the thrombus taking support is withdrawn into the micro catheter is effectively reduced, and the thrombus catching efficiency can be effectively improved; the thrombus removal support device can adjust the thrombus removal position without retracting the distal end protection device before releasing the thrombus removal support, and can effectively improve the positioning accuracy of the thrombus removal support.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a thrombus removal support device with functions of proximal end protection and distal end protection.
Background
Stroke is a common cerebrovascular disease with high morbidity, mortality, and disability, and it is reported that about 80% of patients with surviving cerebrovascular disease have varying degrees of limb dysfunction, with about 43.7% of patients unable to take care of their lives. rt-PA thrombolysis by intravenous injection is a commonly used treatment method for acute phase of cerebral infarction at present, but the treatment time is long, the damage to ischemic brain tissues is large, the bleeding risk is accompanied, and the recanalization rate is very low, wherein the recanalization rate of basilar artery thrombolysis is only about 30%, the recanalization rate of lesion thrombolysis at the tail end of carotid artery is only 6%, and the recanalization rate of total carotid artery thrombolysis is only 27%. It can be seen that the single use of venous thrombolysis for cerebral arterial occlusion is far from sufficient to meet the actual clinical needs. With the advance of medical science and technology, intravascular interventional therapy has become the first choice for treating cerebral apoplexy, and a method for recovering blood flow of blood vessels by taking out thrombus through a thrombus remover has become a common minimally invasive interventional operation method at present.
The thrombus taking device is a medical instrument tool for grabbing thrombus in blood vessels, a self-expanding thrombus taking support is pre-installed in a thrombus taking support device, when the thrombus taking device is used, the distal end head of an outer sheath tube is butted with the proximal end head of a catheter or a microcatheter, the thrombus taking support is pushed into the catheter or the microcatheter through certain acting force and then conveyed to an embolism position, the support is released to grab the thrombus, and then the thrombus is recovered through the microcatheter and taken out. However, during the thrombus extraction process, blood clots or atherosclerotic plaques may break and fall off, and especially when the thrombus extraction stent is withdrawn into a microcatheter after thrombus capture, large thrombi or plaques are easy to break, small thrombi or plaques are formed, are carried away by blood flow, enter blood vessels along the blood flow direction, may block a downstream distal vascular device, or enter the brain, the heart or other important organs along with the blood flow, and finally may cause problems such as cerebral infarction, myocardial infarction, pulmonary embolism, limb embolism and the like, and even death. To address this problem, prior solutions have been to implant additional distal protectors into the body in advance, prior to the embolectomy intervention, to capture the flowing thrombus and plaque. This solution additionally adds an interventional procedure, increases the risk of the patient during the procedure, and prolongs the procedure time.
Disclosure of Invention
1. Technical problem to be solved
The invention solves the technical problem that the invention provides the thrombus taking stent device with the functions of proximal protection and distal protection, in the thrombus taking process, the distal protection device can filter small clots or atherosclerotic plaques flowing along the blood flow direction, so as to effectively prevent the small clots or plaques from continuously entering blood vessels to block downstream organs or entering brains, hearts or other important organs along the blood flow; when the thrombus is withdrawn after the thrombus is caught, the thrombus caught on the thrombus taking support and the thrombus on the support can be completely contained by the near-end protection device, so that the possibility of dropping the thrombus or plaque when the thrombus taking support is withdrawn into the micro catheter is effectively reduced, the thrombus catching efficiency can be effectively improved, and the operation time can be shortened.
2. Technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a thrombus removal support device with a proximal end protection function and a distal end protection function comprises an outer sheath tube, a push rod, a proximal end protection device, a thrombus removal support and a distal end protection device; the sheath tube is of a hollow tubular structure, the push rod is a slender rod, and the near end of the push rod is inserted into the sheath tube; the near-end protection device, the bolt taking bracket and the far-end protection device are sequentially arranged on the push rod from near to far along the axial direction of the push rod; the proximal end protection device and the distal end protection device can slide axially along the push rod, and the embolectomy support is fixedly installed on the push rod.
The thrombus removal stent device with the proximal protection function and the distal protection function is characterized in that the sheath tube is made of one or more of metal, PTFE, FEP, fluorinated ethylene propylene copolymer, POM, nylon, Pebax, polyimide, polyurethane, polyester, polyethylene and other high polymer materials.
The thrombus removal support device with the proximal protection function and the distal protection function is characterized in that the proximal protection device is slidably mounted on the push rod through a second fixing piece, and the proximal protection device is fixedly mounted on the second fixing piece in one or more of welding, bonding or mechanical connection modes.
The thrombus removal support device with the proximal protection function and the distal protection function is characterized in that the distal protection device is rotatably mounted at the distal end of the pushing rod through a fifth fixing piece, and the distal protection device is fixedly mounted on the fifth fixing piece by adopting one or more of welding, bonding or mechanical connection.
The thrombus removal stent device with the proximal protection function and the distal protection function is characterized in that the proximal protection device and the distal protection device are single-layer, double-layer or multi-layer braided fabrics formed by braiding slender filaments of elastic materials or memory materials; the included angle between two adjacent slender wires is less than 180 degrees.
The thrombus removal support device with the proximal protection function and the distal protection function comprises a first fixing piece, a second fixing piece, a third fixing piece, a pushing rod and a pushing rod, wherein the first fixing piece and the second fixing piece are arranged on the inner side of the pushing rod, the second fixing piece and the third fixing piece are arranged on the outer side of the pushing rod, and the pushing rod is sleeved with the third fixing piece in a sliding mode.
The thrombus removal stent device with the proximal end protection function and the distal end protection function is characterized in that the proximal end protection device and the distal end protection device are self-expanding structures; the proximal protection device and the distal protection device adopt one of the following shapes in a natural expansion state:
1) a bell shape; or
2) The far end is provided with a cylindrical bell shape; or
3) A circular truncated cone shape; or
4) The far end is provided with a cylindrical round table shape.
The thrombus removal stent device with the proximal protection function and the distal protection function is characterized in that the braided fabric for preparing the proximal protection device and the distal protection device can be a cylindrical composite structure, a cylindrical straight-edge conical composite structure, a straight-edge conical composite structure, an arc-transition cylindrical composite structure and the like;
the thrombus removal support device with the functions of proximal end protection and distal end protection is characterized in that the thrombus removal support is fixedly arranged on the push rod through a third fixing piece; the thrombus removal support is a self-expansion structure made of elastic materials or memory materials, the length of the thrombus removal support in a pressing and holding state is not more than that of the near-end protection device in a pressing and holding state, and the diameter of the thrombus removal support in a natural expansion state is not more than that of the far-end protection device in a natural expansion state.
The thrombus removal support device with the functions of proximal protection and distal protection is characterized in that one or more developing points are arranged at the distal ends of the proximal protection device and the distal protection device; the developing points are point-shaped, linear or annular.
The thrombus removal support device with the functions of proximal protection and distal protection further comprises a first fixing piece, a fourth fixing piece and a sixth fixing piece; first mounting, fourth mounting and sixth mounting fixed mounting are in on the push rod, just first mounting is installed anterior the second mounting, the fourth mounting is installed between third mounting and the fifth mounting, the sixth mounting is installed fifth mounting rear portion.
The thrombus removal support device with the functions of proximal protection and distal protection is characterized in that the proximal protection device can freely slide between the first fixing piece and the third fixing piece along the axial direction of the push rod;
the thrombus removal support device with the proximal protection function and the distal protection function is characterized in that the distance between the first fixing piece and the third fixing piece is not less than the length of the proximal protection device in a pressing and holding state;
the thrombus removal support device with the proximal end protection function is characterized in that the distal end protection device can freely slide between the fourth fixing piece and the sixth fixing piece along the axial direction of the push rod;
the thrombus removal support device with the proximal protection function and the distal protection function is characterized in that the distance between the fourth fixing piece and the third fixing piece is not less than the length of the thrombus removal support in a press-holding state;
in the thrombus removal stent device with the proximal protection function and the distal protection function, the first fixing member, the second fixing member, the third fixing member and the fifth fixing member are arranged in a developable manner, and can be prepared by adopting a developing material, or sprayed with the developing material, or provided with a developing element.
3 advantageous effects
In conclusion, the beneficial effects of the invention are as follows:
(1) the invention effectively reduces the volume of the thrombus extraction bracket and the conveying device, and can be matched with the microcatheter with the smallest size on the market for use, thereby entering the thinner cerebral vessels or cardiovascular vessels for thrombus extraction;
(2) the invention designs a near-end protection device and a far-end protection device, wherein in the thrombus taking process, the near-end protection device and the far-end protection device are respectively arranged at two ends of a thrombus taking support and two ends of thrombus or atherosclerotic plaque to be taken, both can freely rotate along a push rod, a doctor can randomly rotate the push rod in the thrombus taking process to enable the thrombus taking support to capture thrombus, and meanwhile, the far-end protection device can filter small thrombus or atherosclerotic plaque flowing along the blood flow direction, so that the small thrombus or plaque is effectively prevented from continuously entering blood vessels to block brains, hearts or other important organs; when the thrombus is withdrawn after the thrombus is captured, the proximal end protection device can completely contain the thrombus captured on the thrombus taking support and the stent, so that the possibility of dropping the thrombus or plaque when the thrombus taking support is withdrawn into the micro catheter is effectively reduced, the thrombus capturing efficiency can be effectively improved, and the operation time can be shortened;
(3) before the proximal end protection device is not released, the thrombus taking support device can withdraw the thrombus taking support into the micro catheter and reposition the thrombus taking; after the far-end protection device is released and before the embolectomy support is released, the pushing rod can still be operated to adjust the position of the embolectomy support, so that the positioning accuracy of the embolectomy support can be effectively improved, and the operation efficiency is improved.
Drawings
FIG. 1 is a schematic structural view of a thrombectomy support device according to the present invention;
FIG. 2 is a schematic longitudinal cross-sectional view of a distal portion of the embolic stent device of the present invention in a delivery configuration;
FIG. 3 is a schematic view of the connection of the proximal protector and the second fastener and the connection of the distal protector and the fifth fastener according to the present invention;
FIG. 4 is a side view of the bell shape of the proximal and distal guards of the present invention, shown in a naturally expanded state;
FIG. 5 is a side view of the proximal and distal guards of the present invention in the form of a bell with a cylindrical distal end, shown in a natural expanded configuration;
FIG. 6 is a side view of the proximal and distal guards of the present invention in the form of a truncated cone, shown in a naturally expanded state;
FIG. 7 is a side view of the proximal and distal protectors of the present invention in the form of a truncated cone with a cylindrical distal end, shown in a naturally expanded state;
FIG. 8 is a simplified schematic diagram of the shape of the original braid used to fabricate the proximal and distal end protectors of the thrombectomy stent device of the present invention;
FIG. 9 is a schematic view of a visualization wire and a distal visualization point of the thrombectomy stent of the present invention;
fig. 10-17 are simplified schematic diagrams of the embolectomy support device embolectomy process of the invention.
1. An outer sheath tube; 2. a first fixing member; 3. a second fixing member; 4. a proximal end protection device; 5. a push rod; 6. a third fixing member; 7. a thrombus taking support; 8. a fourth fixing member; 9. A fifth fixing member; 10. a distal protection device; 11. a sixth fixing member; 12. a second/fifth fastener inner ring; 13. a second fixture/fifth fixture outer ring; 14. a microcatheter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a technical solution: a thrombus taking support device with the functions of proximal end protection and distal end protection comprises an outer sheath tube 1, a push rod 5, a proximal end protection device 4, a thrombus taking support 7 and a distal end protection device 10; the sheath tube 1 is of a hollow tubular structure, the push rod 5 is a slender rod, and the near end of the push rod is inserted into the sheath tube 1; the near-end protection device 4, the bolt taking bracket 7 and the far-end protection device 10 are sequentially arranged on the push rod 5 from near to far along the axial direction of the push rod 5; the near-end protection device 4 can be axially slid along the push rod 5, the far-end protection device 10 can be circumferentially rotated along the push rod 5, and the bolt taking support 7 is fixedly installed on the push rod 5.
Further, the material of the sheath tube 1 includes but is not limited to one or more of metal, PTFE, FEP, fluorinated ethylene propylene copolymer, POM, nylon, Pebax, polyimide, polyurethane, polyester, polyethylene and other high polymer materials; meanwhile, the inner wall of the far end of the outer sheath tube is designed to be round-angle transition smooth;
further, the proximal end protection device 4 is connected with the second fixing member 3 in a sleeved manner, a welding manner, a glue bonding manner and/or a mechanical connection manner, and is sleeved on the push rod 5 and can freely slide between the first fixing member 2 and the third fixing member 6 along the axial direction; the material of the second fixing part 3 comprises metal or macromolecule;
further, the first fixing member 2 is permanently fixed on the pushing rod 5, and the material of the first fixing member comprises metal or high polymer;
further, the distance between the first fixing part 2 and the third fixing part 6 is not less than the length of the proximal end protection device 4 in a pressing and holding state;
further, the embolectomy support 7 is permanently fixed on the pushing rod 5 by a third fixing piece 6; the third fixing member 6 is made of metal or polymer;
further, the distal end protection device 10 is connected to the fifth fixing member 9 in a manner of being sleeved outside, a welding manner, a glue bonding manner, and/or a mechanical connection manner, and is sleeved on the push rod 5 and can rotate radially around the push rod 5;
further, the distal protection device 10 and the fifth fixing element 9 can slide freely along the axial direction of the push rod 5 between the fourth fixing element 8 and the sixth fixing element 11;
further, the distance between the fourth fixing piece 8 and the third fixing piece 11 is not less than the length of the embolectomy support 7 in a pressing and holding state;
furthermore, the materials of the fourth fixing element 8 and the sixth fixing element 11 include metal or polymer;
further, the first fixing member 2, the second fixing member 3, the third fixing member 6 and the fifth fixing member 9 are all of a developing device, and can be made of a developing material, or sprayed with the developing material, or provided with a developing element;
when the thrombus removal stent device is in a delivery configuration as shown in fig. 2, the thrombus removal stent 7, the proximal end protection device 4 and the distal end protection device 10 are all in a pressing and holding state, are arranged on the push rod 5 in parallel along the axial direction, are not overlapped with each other, and are arranged in the lumen of the outer sheath tube 1;
further, after the thrombus is removed, the pushing rod 5 is retracted, the proximal protecting device 4 slides along the pushing rod 5 until reaching the third fixing piece 6, and further, the pushing rod 5 is further retracted to completely accommodate the thrombus removing support 7, and further, the proximal protecting device 4, the thrombus removing support 7 and the distal protecting device 10 are accommodated into the microcatheter 14 together;
as shown in fig. 3, the second fixing member 3 and the fifth fixing member 9 are composed of an inner ring 12 and an outer ring 13, the inner ring 12 is disposed inside the proximal end protection device 4 or the distal end protection device 10, the outer ring 13 is disposed outside the proximal end protection device 4 or the distal end protection device 10, and the inner ring and the outer ring are sleeved on the push rod 5 in a sliding manner;
further, as shown in fig. 4 to 7, the proximal protection device 4 and the distal protection device 10 are self-expandable, and when naturally expanded, the proximal protection device 4 and the distal protection device 10 adopt one of the following shapes:
1) a bell shape; or
2) The far end is provided with a cylindrical bell shape; or
3) A circular truncated cone shape; or
4) The far end is provided with a cylindrical round table shape.
Further, in a pressing and holding state, the length of the proximal protection device 4 is not less than the length of the embolectomy bracket 7 at least and not more than the sum of the lengths of the embolectomy bracket 7 and the distal protection device 10 at most;
further, in a natural expansion state, the diameter of the far end of the near-end protection device 4 is larger than the maximum diameter of the embolectomy stent 7;
that is, when the stent is withdrawn, the proximal protection device 4 can completely store the embolectomy stent 7, can not store the distal protection device 10, and can partially or completely store the distal protection device;
further, as shown in fig. 4 to 7, the distal ends of the proximal protection device 4 and the distal protection device 10 are each provided with one or more visualization points, which may be in a point shape, a linear shape, or a ring shape;
as shown in fig. 8, the proximal end protector 4 and the distal end protector 10 are single-layer, double-layer or multi-layer braids formed by braiding or weaving elongated filaments of elastic material or memory material; and the included angle between the slender filaments is less than 180 degrees, preferably 120 degrees;
further, the braided fabric for preparing the proximal protector 4 and the distal protector 10 may be a cylindrical, cylindrical-straight-edged tapered composite structure, a straight-edged tapered, an arc-tapered cylindrical conforming structure, or the like;
as shown in fig. 9, the embolectomy stent 7 is self-expandable, and is composed of a plurality of identical or different grid cells cut or/and woven from an elastic material or a memory material, and the grid cell size of the embolectomy stent is larger than that of the woven grid cells of the proximal protection device and the distal protection device;
further, the embolectomy support 7 is in a roll shape, the near end and the far end of the embolectomy support are in a circular or arc design and are both in an open state, and the diameter of the near end is smaller than that of the far end;
further, the middle section of the embolectomy support 7 is designed by combining grid cells with different sizes;
furthermore, one or more sections of developing wires are arranged from the near end to the far end of the embolectomy support 7, and the shape of the developing wires naturally fluctuates with the embolectomy support grid to form a wave shape;
furthermore, the distal end of the embolectomy support 7 is provided with two or more development points, and the development points are point-shaped, linear or annular.
The using method comprises the following steps:
fig. 10 to 17 are schematic diagrams illustrating a thrombus removal process of the thrombus removal stent device, in which a doctor firstly abuts a proximal end of an outer sheath 1 of the thrombus removal stent device with a distal end of a micro-catheter 14, pushes a push rod 5, pushes a distal protection device 10, a thrombus removal stent 7 and a proximal protection device 4 into the micro-catheter 14, pushes the thrombus removal stent 7 to a thrombus or atherosclerotic plaque position through the micro-catheter 14, and positions the thrombus removal stent 7 through a development point of the thrombus removal stent 7, a development wire and a development element of a third fixing member 6, that is, the thrombus or atherosclerotic plaque is required to be located in the middle of the thrombus removal stent 7;
further, the microcatheter 14 is withdrawn, the distal protection device 10 is naturally and slowly released, and when the developing ring of the microcatheter 14 passes over the developing point of the fifth fixing member 9, the distal protection device 10 is completely released; in the process, if the doctor judges that the position of the thrombus taking support 7 is not proper, the pushing rod 5 can be moved back and forth slightly to adjust and position, or the pushing rod 5 is retracted until the distal development point of the distal protection device 10 crosses the development ring of the microcatheter 14, the distal protection device 10 is completely retracted into the microcatheter 14, and then the microcatheter 14 is adjusted back and forth to reposition the thrombus taking support 7;
further, the microcatheter 7 is continuously withdrawn, and the thrombus removal stent 7 is slowly released until the developing ring of the microcatheter 14 passes over the developing element of the third fixing member 6, which shows that the thrombus removal stent 7 is completely released;
further, continuing to withdraw the microcatheter 14, the proximal protector 4 slowly releases until the ring of visualization of the microcatheter 14 passes over the visualization element of the second mount 3, indicating that the proximal protector 4 is completely released;
further, the doctor can rotate the push rod 5, and the thrombus taking support 7 rotates along with the push rod, so that the capturing capacity of the thrombus taking support 7 on thrombus or atherosclerotic plaque is enhanced;
further, after the thrombectomy stent 7 and the distal protection device 10 are released, before the proximal protection device 4 is released, the microcatheter 14 can be pushed until the microcatheter 14 visualization ring passes the distal visualization point of the distal protection device 10, the thrombectomy stent 7 and the distal protection device 10 are retracted into the microcatheter 14, and then the microcatheter 14 is adjusted back and forth to reposition the thrombectomy stent 7;
in the thrombus taking process, the far-end protection device 10 can filter small blood clots or atherosclerotic plaques flowing along the blood flow direction, and effectively prevent the small thrombus or plaques from continuously entering blood vessels to block the brain, the heart or other important organs;
after the thrombus is removed, the pushing rod 5 is withdrawn, and when the second fixing piece 3 slides to the position of the developing ring of the microcatheter 14, the near-end protection device 4 is temporarily fixed at the far-end head end of the microcatheter 14 due to friction and the pushing force of the microcatheter 14 to the near-end protection device;
further, the pushing rod 5 continues to be withdrawn, and when the third fixing piece 6 passes over the far-end developing point of the near-end protection device 4, the near-end protection device 4 starts to slowly wrap the thrombus on the thrombus removal support 7;
further, the pushing rod 5 continues to be withdrawn, and when the third fixing piece 6 reaches the position of the second fixing piece 3, the proximal end protection device 4 is wrapped by the thrombus removal support 7 and is collected into the microcatheter 14;
further, in the process of recovering the thrombus stent 7 into the micro catheter 14, the package of the near-end protection device 4 effectively reduces the possibility of thrombus or plaque falling off when the thrombus stent 7 is withdrawn into the micro catheter 14, and can effectively improve the thrombus capture efficiency;
further, in the process of recovering the thrombus taking support 7 to the micro catheter 14, small blood clots or atherosclerotic plaques which cannot be avoided can be filtered by the distal protection device 10, so that the small thrombus or plaques can be effectively prevented from entering blood vessels along the blood flow direction to block the brain, the heart or other important organs;
further, when the pushing rod 5 is continuously withdrawn and the developing element of the fifth fixing member 9 passes over the developing ring of the micro-catheter 14, the distal end protection device 10 starts to be retracted into the micro-catheter 14; when the distal visualization point of the distal protection device 10 crosses the visualization ring of the microcatheter 14, the distal protection device 10 is shown fully stowed within the microcatheter 14, as shown in FIG. 14;
further, withdrawing the microcatheter 14 and the push rod 5, and withdrawing the microcatheter 14 and the whole thrombus removal stent device from the human body;
in conclusion, the distal protection device 10 designed by the invention can filter small blood clots or atherosclerotic plaques flowing along the blood flow direction in the thrombus removal process, and effectively prevent the small blood clots or plaques from continuously entering blood vessels to block the brain, the heart or other important organs; the proximal end protection device 4 can completely contain the thrombus captured on the thrombus-capturing stent 7 and the stent, so that the possibility of falling of thrombus or plaque when the thrombus-capturing stent 7 is withdrawn into the micro catheter is effectively reduced, the thrombus-capturing efficiency can be effectively improved, and the operation time can be shortened.
Further, the thrombectomy stent device of the present invention can withdraw the thrombectomy stent 7 into the micro-catheter 14 before the proximal protection device 4 is not released, and reposition the thrombectomy; after the distal end protection device 10 is released and before the embolectomy support 7 is released, the pushing rod can still be operated to adjust the position of the embolectomy support 7, so that the positioning accuracy of the embolectomy support 7 can be effectively improved, and the operation efficiency is improved;
furthermore, the forming process and the performance of the thrombus removal support device are easy to control and guarantee.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A thrombus extraction support device with functions of proximal end protection and distal end protection is characterized in that: comprises an outer sheath tube (1), a push rod (5), a near-end protection device (4), a thrombus removal bracket (7) and a far-end protection device (10); the sheath tube (1) is of a hollow tubular structure, the push rod (5) is a slender rod, and the near end of the push rod is inserted into the sheath tube (1); the near-end protection device (4), the bolt taking support (7) and the far-end protection device (10) are sequentially arranged on the push rod (5) from near to far along the axial direction of the push rod (5); the near-end protection device (4) and the far-end protection device (10) can axially slide along the push rod (5), and the bolt-removing support (7) is fixedly installed on the push rod (5).
2. The embolectomy support device of claim 1, wherein: the near-end protection device (4) is slidably mounted on the push rod (5) through a second fixing piece (3), and the near-end protection device (4) is fixedly mounted on the second fixing piece (3) in one of the modes of welding, bonding or mechanical connection.
3. The embolectomy support device of claim 2, wherein: the far-end protection device (10) is rotatably mounted on the pushing rod (5) through a fifth fixing piece (9), and the far-end protection device (10) is fixedly mounted on the fifth fixing piece (9) in one of the modes of welding, bonding or mechanical connection.
4. A thrombectomy support device with proximal and distal protection according to claim 3, wherein: the near-end protection device (4) and the far-end protection device (10) are single-layer, double-layer or multi-layer braided fabrics formed by braiding slender wires made of elastic materials or memory materials; the included angle between two adjacent slender wires is less than 180 degrees.
5. The thrombectomy support device of claim 4, wherein: the second fixing piece (3) and the fifth fixing piece (9) are composed of an inner ring (12) and an outer ring (13), the inner ring (12) is arranged on the inner side of the near-end protection device (4) or the far-end protection device (10), the outer ring (13) is arranged on the outer side of the near-end protection device (4) or the far-end protection device (10), and the inner ring (12) and the outer ring (13) are sleeved on the push rod (5) in a sliding mode.
6. The thrombectomy support device of claim 5, wherein: the proximal protection device (4) and the distal protection device (10) are self-expanding structures; the proximal protection device (4) and the distal protection device (10) adopt one of the following shapes:
1) a bell shape; or
2) The far end is provided with a cylindrical bell shape; or
3) A circular truncated cone shape; or
4) The far end is provided with a cylindrical round table shape.
7. The thrombectomy support device of claim 6, wherein: the thrombus taking support (7) is fixedly arranged on the pushing rod (5) through a third fixing piece (6); the thrombus removal support (7) is of a self-expansion type structure made of elastic materials or memory materials, the length of the thrombus removal support in a pressing and holding state is not more than that of the near-end protection device (4) in a pressing and holding state, and the diameter of the thrombus removal support in a natural expansion state is not more than that of the far-end protection device (10) in a natural expansion state.
8. The embolectomy support device of claim 7, wherein: one or more developing points are arranged at the far ends of the near-end protection device (4) and the far-end protection device (10); the developing points are point-shaped, linear or annular.
9. The embolectomy support device of claim 8, wherein: the fixing device also comprises a first fixing piece (2), a fourth fixing piece (8) and a sixth fixing piece (11); first mounting (2), fourth mounting (8) and sixth mounting (11) fixed mounting are in on push rod (5), just first mounting (2) is installed second mounting (3) are anterior, fourth mounting (8) are installed between third mounting (6) and fifth mounting (9), sixth mounting (11) are installed fifth mounting (9) rear portion.
10. The embolectomy support device of claim 9, wherein: the first fixing piece (2), the second fixing piece (3), the third fixing piece (6) and the fifth fixing piece (9) are arranged in a developing mode, and can be made of developing materials, or spraying the developing materials, or installing developing elements.
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| CN202020153872.2U CN211749877U (en) | 2020-02-06 | 2020-02-06 | Thrombectomy support device with near-end protection and far-end protection functions |
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| CN202020153872.2U CN211749877U (en) | 2020-02-06 | 2020-02-06 | Thrombectomy support device with near-end protection and far-end protection functions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114886506A (en) * | 2022-07-13 | 2022-08-12 | 苏州中天医疗器械科技有限公司 | Embolectomy system and embolectomy method |
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2020
- 2020-02-06 CN CN202020153872.2U patent/CN211749877U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114886506A (en) * | 2022-07-13 | 2022-08-12 | 苏州中天医疗器械科技有限公司 | Embolectomy system and embolectomy method |
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