CN215228885U - Self-expanding support suitable for intracranial venous sinus and conveying system thereof - Google Patents
Self-expanding support suitable for intracranial venous sinus and conveying system thereof Download PDFInfo
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- CN215228885U CN215228885U CN202022567474.8U CN202022567474U CN215228885U CN 215228885 U CN215228885 U CN 215228885U CN 202022567474 U CN202022567474 U CN 202022567474U CN 215228885 U CN215228885 U CN 215228885U
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Abstract
The utility model relates to the technical field of blood vessel stents, in particular to a self-expanding stent suitable for intracranial venous sinus, which comprises a plurality of tubular components, wherein each tubular component is provided with a front opening end and a rear opening end, and is provided with a first diameter for being inserted into a blood vessel and a second diameter for being unfolded in the blood vessel; the length of the tubular assembly at the first diameter is greater than the length of the tubular assembly at the second diameter; the tubular assembly comprises a plurality of annular supporting parts which are coaxially arranged and a connecting part which is used for connecting two adjacent supporting parts; the supporting part is a corrugated structure formed by surrounding metal wires; two branchesThe wave crests and the wave troughs on the adjacent sides of the supporting parts are oppositely arranged, and the connecting parts are used for connecting the wave crests and the wave troughs on the adjacent sides of the two supporting parts, so that hollow parts are formed; the unit area of the hollow part is 5.6-7.4mm2. The utility model discloses owing to adopt the crest and the trough of the adjacent one side of connecting portion with two supporting parts to be connected and form fretwork portion, can improve the compliance of the radial holding power that the support is fit for and support.
Description
Technical Field
The utility model relates to a blood vessel support technical field specifically is a self-expanding support and conveying system suitable for intracranial venous sinus.
Background
The stent implantation refers to a technique for expanding and recanalizing narrow and blocked blood vessels or cavities by utilizing the techniques of puncture, catheter, balloon catheter expansion formation, metal stent implantation and the like, and solves the problem of the traditional surgical blind area. The stenosis and occlusion of blood vessels and cavities are the strong treatment items of the interventional stent implantation technology. Has the advantages of small wound, high curative effect, low risk, less complication, short hospitalization time and the like, and creates a new way for the stenosis and the occlusion of blood vessels and cavities.
Existing stents are based on arterial vessel design, while fewer stents are targeted at intracranial venous sinus vessels. Because the venous sinus is thin and has no elasticity, the diameter of the venous sinus is larger than that of an intracranial cerebral artery, in the process of manufacturing the stent, factors such as the diameter and radial supporting force need to be considered, the expanded diameter of the stent is generally larger than the inner diameter of a blood vessel so as to ensure that the stent can be relatively fixed and expand a narrow blood vessel, meanwhile, the suitability of the radial supporting force of the stent needs to be considered, the resistance of the stent in advancing in the blood vessel needs to be considered, and the diameter of the stent during contraction is required to be as small as possible. The existing artery stent is not suitable for the vein sinus vessel.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a self-expanding stent suitable for use in the intracranial venous sinus and a delivery system therefor.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
in one aspect, the present invention provides a self-expanding stent suitable for intracranial venous sinus, comprising: a plurality of tubular assemblies, each tubular assembly having a front open end and a rear open end and having a first diameter for insertion into a blood vessel and a second diameter for deployment within the blood vessel; the first diameter is smallAt the second diameter, and the length of the tubular element at the first diameter is greater than the length of the tubular element at the second diameter; the tubular components are connected by metal wires; the tubular assembly is of an open-loop structure; the tubular assembly comprises a plurality of annular supporting parts which are coaxially arranged and a connecting part which is used for connecting two adjacent supporting parts; the supporting part is a corrugated structure formed by surrounding metal wires and is used for providing radial supporting force; the wave crests and the wave troughs on the adjacent sides of the two supporting parts are oppositely arranged, or the wave crests and the wave crests are oppositely arranged, or the wave troughs and the wave troughs are oppositely arranged, and the connecting parts are used for connecting the wave crests and the wave troughs on the adjacent sides of the two supporting parts, so that hollow parts are formed; the unit area of the hollow part is 5.6-7.4mm2。
Optionally, the tubular assembly is made of wire having a diameter of 0.148-0.162 mm.
Alternatively, the maximum particle diameter of the hollow parts is 0.8-1.1mm, and the number of the maximum particles passing through each hollow part is 3.
Optionally, the stent is formed of a plurality of tubular members having a length of 50-70mm and a diameter of 7-9 mm.
Optionally, the radial support force of the tubular assembly is 9-12N/mm.
Optionally, the stent further comprises at least one radiopaque tab mounted on at least one of the front and rear open ends, the tab for improving the radiopacity of the stent.
On the other hand, the utility model also provides a conveying system, include: the inner rod is provided with an inner rod far end and an inner rod near end, the inner rod far end is connected with the inner rod tip, and the inner rod near end is connected with the inner rod shunt; a guide wire cavity for inserting a guide wire is formed in the inner rod, and the guide wire is used for guiding the inner rod to move forwards in a blood vessel; the Y-shaped valve comprises a valve proximal end, a valve distal end and a Y-shaped connecting port; the near end of the valve is connected with the near end of the inner rod, and the far end of the valve is connected with the outer sheath; the Y-shaped connecting port is used for connecting an injector and is used for injecting liquid into the outer sheath; the sheath is provided with a sheath far end and a sheath near end, the sheath near end is connected with the sheath shunt, the sheath shunt is connected with the valve far end of the Y-shaped valve, the sheath far end is sleeved outside the inner rod far end, and the sheath far end is provided with a sheath X-ray-proof mark; the far end of the inner rod is provided with a bracket bed for sleeving the bracket; the two ends of the support bed are respectively provided with a far-end inner rod support mark and a near-end inner rod support mark which are used for blocking the movement of the support; the inner rod at the near end side of the mark of the near end inner rod support is sleeved with a coil, the inner rod at the near end side of the coil and the outer sheath are provided with guide wire outlets, and the guide wires penetrate into the guide wire cavity of the inner rod from the guide wire outlets on the outer sheath and the inner rod and penetrate out from the tip of the inner rod so as to guide the movement of the inner rod.
Optionally, the inner diameter of the guidewire lumen is the same as the diameter of the guidewire so that the guidewire does not displace relative to the inner shaft as it is advanced.
Optionally, the proximal end of the inner shaft tip has a diameter that is the same as the diameter of the distal end of the outer sheath, and the distal end of the inner shaft tip has a diameter that is less than the diameter of the distal end of the outer sheath.
Optionally, the outer sheath distal diameter is greater than the outer sheath proximal diameter.
(III) advantageous effects
The utility model has the advantages that: the utility model provides a self-expanding bracket which is suitable for intracranial venous sinus, and the flexibility of the bracket can be improved because the bracket adopts an open-loop structure; the wave crests and the wave troughs on the adjacent sides of the two supporting parts are connected by the connecting parts to form hollow parts, so that the suitable radial supporting force of the support can be improved. The unit area of the hollow part is 5.6-7.4mm2The size of the particulate matter passing through the stent can be made smaller.
The utility model provides a delivery system, which is characterized in that the distal part of the outer sheath and the distal part of the inner rod are provided with guide wire outlets, thereby ensuring that the guide wire can play a guiding role and simultaneously shortening the length of the guide wire; and the inner rods at the two ends of the support are respectively provided with a far-end inner rod support mark and a near-end inner rod support mark, so that the support can be marked on one hand, and the support can be prevented from moving on the inner rods on the other hand.
Drawings
Fig. 1 is a schematic structural view of a self-expanding stent suitable for intracranial venous sinus of the present invention.
Fig. 2 is a schematic structural diagram of a conveying system according to the present invention.
Fig. 3 is a schematic diagram of a far end structure of a conveying system according to the present invention.
[ description of reference ]
100: a tubular assembly; 110: a front open end; 120: a rear open end; 130: a support portion; 131: wave crest; 132: a trough of a wave; 140: a connecting portion; 150: a hollow-out section; 160: a radiopaque tab;
200: an inner rod; 210: a distal end of the inner rod; 220: the proximal end of the inner rod; 230: an inner rod tip; 240: an inner rod shunt; 250: a guidewire lumen; 260: a support bed; 270: marking a distal inner rod bracket; 280: marking a proximal inner rod bracket; 290: a coil; 291: a coil bushing;
300: a Y-shaped valve; 310: a valve proximal end; 320: a valve distal end; 330: a Y-shaped connecting port;
400: an outer sheath; 410: a distal sheath end; 420: a proximal end of the sheath; 430: a sheath shunt; 440: the sheath is not transparent to X-ray marks;
500: a guide wire; 510: a guidewire exit.
Detailed Description
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
For ease of description, the following description uses the terms "proximal" and "distal", where "proximal" refers to the end proximal to the operating end and "distal" refers to the end distal to the operating end.
Example (b): referring to fig. 1, the present invention provides a self-expanding stent suitable for use in an intracranial venous sinus, comprising a plurality of tubular assemblies 100, each tubular assembly 100 having an anterior open end 110 and a posterior open end 120, and having a first diameter for insertion into a blood vessel and a second diameter for deployment within the blood vessel; the first diameter is less than the second diameter and the length of the tubular assembly 100 at the first diameter is greater than the length of the tubular assembly 100 at the second diameter. The tubular members 100 are connected by wires. Because the cross section of the sinus cavity is triangular, the tubular assembly 100 is designed into an uninterrupted open-loop structure, so that the flexibility of the pre-installed stent in the implantation process can be improved, and the adherence of the stent after release can be better. Of course, while ensuring the compliance of the tubular assembly 100, the present invention may also be used with tubular assemblies 100 of closed-loop design.
The tubular assembly 100 includes a plurality of coaxially arranged annular support portions 130, and a connecting portion 140 for connecting two adjacent support portions 130.
The supporting portion 130 is a corrugated structure formed by metal wires, and is used for providing radial supporting force to the tubular assembly 100. The connecting portion 140 is also made of a metal wire. The utility model discloses in, the wire of supporting part 130 and connecting portion 140 can be nickel titanium alloy, still can be for metal tantalum, cobalt chromium alloy or can absorb metal material, can absorb the material and can be for materials such as magnesium alloy or zinc-based alloy. The nickel titanium alloy is selected to the wire of this embodiment, mainly because nickel titanium alloy is memory alloy, has from the expanded advantage, the compression of being convenient for, and the adherence is better after the expansion moreover, has better corrosion resistance and fatigue resistance, and radial holding power is strong, and the shrinkage rate of support after the inflation is little, and the visibility is better under the perspective, and the holistic compliance of nickel titanium alloy support is good, compares with other materials, resumes the shape more easily after the extrusion.
The connecting portion 140 is designed as a curved U-like structure, which may achieve the advantage of facilitating compression and distraction of the stent.
In the middle portion of the tubular assembly 100, the peaks 131 and the valleys 132 of the adjacent sides of the two supporting portions 130 are opposite to the peaks 131 and the valleys 132 are opposite to the valleys 132. Since the two end portions of the tubular assembly 100 have a larger diameter than the middle portion when they are unfolded, the number of corrugations of the supporting portions 130 at the two end portions of the tubular assembly 100 is greater than that of the supporting portions 130 at the middle portion, so that the peaks 131 or the valleys 132 of the supporting portions 130 at the two end portions may be in contact therewithThe valleys 132 or the peaks 131 of the adjacent supporting parts 130 are opposite. The connecting part 140 is used for connecting the peaks 131 and 131 or the troughs 132 and 132 of adjacent sides of the two supporting parts 130, so as to form a hollow part 150; the unit area of the hollow part 150 is 5.6-7.4mm2。
In this embodiment, the supporting portion 130 and the supporting portion 130 on the adjacent side thereof connect the wave crest 131 with the wave trough 132 through the connecting portion 140; the wave crest 131 is arranged between the two connecting parts 140 on one side of the wave crest 131 of the supporting part 130 at intervals, the flexibility of the stent can be improved by adopting the structure, the radial supporting force of the stent can not be too large or too small, the effect of supporting the blood vessel wall can be achieved, and the injury to the blood vessel wall can not be caused after the operation.
In this embodiment, the connecting portion 140 is a U-shaped metal wire, and the radial supporting force of the stent can be increased by designing the connecting portion 140 to be a U-shaped structure; and the connection part 140 of the U-shaped structure can reduce the foreshortening rate of the stent with respect to the connection part 140 of the straight-line structure.
The utility model discloses a venous sinus is from expanding support, owing to adopt the peak and the trough of connecting portion with the adjacent one side of two supporting parts to be connected and form fretwork portion, can improve the compliance of the radial holding power of support and support. The unit area of the hollow part is 5.6-7.4mm2The size of the particulate matter passing through the stent can be made smaller.
Based on the above embodiments, the wire diameter of the tubular assembly 100 of the present invention is 0.148-0.162 mm. The reduced diameter of the wire relative to the prior art may improve the flexibility of the stent.
Based on the above embodiments, the tubular member 100 of the present invention has a length of 50-70mm and a diameter of 7-9mm, which is the diameter of the stent when it is deployed. The length and diameter of the tubular assembly 100 is selected according to the condition of the patient. In the present embodiment, it is preferable to design the tubular assembly 100 to have lengths of three sizes of 50mm, 60mm and 70 mm; the diameters are 7mm, 8mm and 9 mm. The tubular assembly 100 of the present invention can be released through an inner diameter 0.726F Navien intermediate catheter.
On the basis of the above embodiment, the maximum diameter of the hollow-out part 150 of the utility model is 0.8-1.1mm, and the number of the maximum particles of each hollow-out part 150 is 3. Because the area of fretwork portion reduces for prior art's area, can reduce the passing through of particulate matter on the one hand, on the other hand can improve the radial holding power of support.
On the basis of the above embodiments, the radial supporting force of the tubular assembly 100 of the present invention is 9-12N/mm. Because the used position of support is different, the requirement to the radial holding power of support is completely different, the utility model discloses mainly be applied to the venous sinus. The utility model discloses a radial holding power of tubulose subassembly 100 will be littleer than the holding power of artery support, because the radial holding power of carotid artery support is too big, if use at the venous sinus, then can cause the injury to venous vessel, endanger patient's life safety. The radial supporting force of the tubular component 100 of the utility model is in the range of the intracranial aneurysm auxiliary embolism support and the carotid artery self-expanding support, namely, the radial supporting force of the peripheral blood vessel and the carotid artery self-expanding support is lower than the radial supporting force of the intracranial aneurysm auxiliary embolism support.
In addition to the above embodiments, the stent of the present invention further comprises at least one radiopaque tab 160 mounted on at least one of the front open end 110 and the rear open end 120, the tab being configured to improve the radiopacity of the stent to provide good visualization of the stent. This embodiment provides three radiopaque tabs 160 on the anterior and posterior open ends 110 and 120, respectively, of the stent.
The present invention also provides a delivery system for delivering the self-expanding stent suitable for use in an intracranial venous sinus as described above, with reference to fig. 2 and 3, the system comprising: an inner shaft 200, a Y-shaped valve 300, an outer sheath 400, and a guidewire 500.
An inner rod 200 having an inner rod distal end 210 and an inner rod proximal end 220, the inner rod distal end 210 connected to an inner rod tip 230, the inner rod proximal end 220 connected to an inner rod shunt 240; the inner rod 200 is provided with a guide wire cavity 250 for inserting a guide wire 500 inside, and the guide wire 500 is used for guiding the inner rod 200 to advance in the blood vessel. The guidewire lumen 250 is capable of passing at least over a guidewire having a diameter of 0.014 mm. In this embodiment, the guidewire lumen 250 is capable of passing over a guidewire of 0.018mm diameter.
A Y-valve 300 including a proximal valve end 310, a distal valve end 320, and a Y-port 330; the proximal valve end 310 is attached to the proximal inner shaft end 220 and the distal valve end 320 is attached to the outer sheath 400; the Y-port 330 is used to connect a syringe for injecting fluid into the outer sheath 400.
The outer sheath 400 has a distal sheath end 410 and a proximal sheath end 420, the proximal sheath end 420 is coupled to the sheath shunt 430, the sheath shunt 430 is coupled to the valve distal end 320 of the Y-valve 300, the distal sheath end 410 is disposed outside the distal inner shaft end 210, and the distal sheath end 410 is provided with a sheath radiopaque marker 440. The diameter of the outer sheath 400 is smaller than the inner diameter of the existing 6F intermediate catheter to allow the release of a 6F 115mm length of intermediate catheter; the length of the sheath 400 needs to be long enough, and the length of the sheath 400 is greater than the sum of the lengths of the intermediate catheter and the Y-valve 300 plus about 50 mm.
Specifically, the distal end 210 of the inner rod is fixedly provided with a stent bed 260 for sleeving a stent; a far-end inner rod support mark 270 and a near-end inner rod support mark 280 which are fixed on the inner rod 200 are respectively arranged at two ends of the support bed 260 and used for blocking the movement of the support on the support bed 260; a coil 290 is sleeved on the inner rod 200 at the proximal side of the proximal inner rod stent marker 280, a guide wire outlet 510 is arranged on the inner rod 200 at the proximal side of the coil 290 and the outer sheath 400, and a guide wire 500 is inserted into the guide wire cavity 250 of the inner rod 200 from the guide wire outlet 510 on the outer sheath 400 and the inner rod 200 and is penetrated out from the tip 230 of the inner rod to guide the movement of the inner rod 200. The coil 290 is also externally sleeved with a coil sleeve 291 for wrapping the coil 290 to prevent it from spreading in a radial direction.
The delivery system of the utility model is provided with the guide wire outlet at the distal part of the outer sheath and the distal part of the inner rod, thereby ensuring that the guide wire has the guiding function and simultaneously shortening the length of the guide wire; and the inner rods at the two ends of the support are respectively provided with a far-end inner rod support mark and a near-end inner rod support mark, so that the support can be marked on one hand, and the support can be prevented from moving on the inner rods on the other hand.
On the basis of the above embodiment, the inner diameter of the guide wire cavity 250 of the present invention is the same as the diameter of the guide wire 500, so that the guide wire 500 does not displace relative to the inner rod 200 when advancing.
On the basis of the above embodiment, the diameter of the proximal end of the inner rod tip 230 of the present invention is the same as the diameter of the distal end 410 of the outer sheath, which can prevent the distal end 410 of the outer sheath from sliding toward the distal end of the inner rod tip 230; the diameter of the distal end of the inner shaft tip 230 is smaller than the diameter of the outer sheath distal end 410 to help guide the outer sheath distal end 410 along with the inner shaft tip 230 within the blood vessel.
On the basis of the above embodiment, the diameter of the distal end 410 of the sheath of the present invention is larger than the diameter of the proximal end 420 of the sheath, and the present invention is mainly used for loading the stent, and is convenient for the operator to observe the condition of the stent in the blood vessel.
The utility model discloses transfer system's work flow does:
firstly, assembling a conveying system, and conveying a support into the conveying system in a compression manner;
then, the inner shaft 500, the outer sheath 400 and the stent in the outer sheath 400 of the distal portion of the delivery system are delivered to the vascular lesion through the guidance of the guide wire 500;
after the stent is delivered to the vascular lesion, the operator holds the inner rod shunt 240, and pulls the outer sheath 400 at the operating end to move the outer sheath 400 to the outside of the body, at which time the distal portion of the stent begins to expand; as the outer sheath 400 is moved outside the body, the stent is fully deployed at the vascular lesion, at which time the outer sheath radiopaque marker 440 is located proximal to the proximal inner rod stent marker 280;
finally, the inner rod shunt 240 and the outer sheath 400 are pulled again, the inner rod 200 and the outer sheath 400 are pulled out of the body, and the stent is left at the pathological change part of the blood vessel to play a role in supporting the blood vessel.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that modifications, alterations, substitutions and variations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A self-expanding stent suitable for use in an intracranial venous sinus, comprising: a plurality of tubular assemblies (100),
each of said tubular assemblies (100) having a front open end (110) and a rear open end (120) and having a first diameter for insertion into a blood vessel and a second diameter for deployment within the blood vessel; the first diameter is smaller than the second diameter, and the length of the tubular assembly (100) at the first diameter is greater than the length of the tubular assembly (100) at the second diameter;
the tubular components (100) are connected by metal wires; the tubular assembly (100) is of an open-loop structure;
the tubular assembly (100) comprises a plurality of annular supporting parts (130) which are coaxially arranged, and a connecting part (140) for connecting two adjacent supporting parts (130);
the supporting part (130) is a corrugated structure formed by surrounding metal wires and is used for providing radial supporting force;
the wave crests (131) and the wave troughs (132) on the adjacent sides of the two supporting parts (130) are oppositely arranged, or the wave crests (131) and the wave troughs (131) are oppositely arranged, or the wave troughs (132) and the wave troughs (132) are oppositely arranged, and the connecting part (140) is used for connecting the wave crests (131) and the wave troughs (132) on the adjacent sides of the two supporting parts (130), so that hollow parts (150) are formed;
the unit area of the hollow part (150) is 5.6-7.4mm2。
2. The self-expanding stent for use in an intracranial venous sinus as recited in claim 1,
the tubular assembly (100) is made of wire having a diameter of 0.148-0.162 mm.
3. The self-expanding stent for use in an intracranial venous sinus as recited in claim 1,
the maximum particle diameter of the hollow-out parts (150) is 0.8-1.1mm, and the number of the maximum particles which can pass through each hollow-out part (150) is 3.
4. The self-expanding stent for use in an intracranial venous sinus as recited in claim 1,
the stent formed by the plurality of tubular components (100) has the length of 50-70mm and the diameter of 7-9 mm.
5. The self-expanding stent for use in an intracranial venous sinus as recited in claim 1,
the radial supporting force of the tubular assembly (100) is 9-12N/mm.
6. The self-expanding stent for use in an intracranial venous sinus as recited in claim 1,
the stent also includes at least one radiopaque tab (160) mounted on at least one of the front open end (110) and the rear open end (120), the tab for improving the radiopacity of the stent.
7. A delivery system for delivering the self-expanding scaffold suitable for use in the intracranial venous sinus of any one of claims 1-6, comprising:
the inner rod (200) is provided with an inner rod far end (210) and an inner rod near end (220), the inner rod far end (210) is connected with an inner rod tip (230), and the inner rod near end (220) is connected with an inner rod shunt (240); a guide wire cavity (250) for inserting a guide wire (500) is formed in the inner rod (200), and the guide wire (500) is used for guiding the inner rod (200) to move forwards in a blood vessel;
a Y-valve (300) comprising a proximal valve end (310), a distal valve end (320), and a Y-port (330); the valve proximal end (310) is connected to the inner shaft proximal end (220), and the valve distal end (320) is connected to the outer sheath (400); the Y-shaped connecting port (330) is used for connecting a syringe and injecting liquid into the sheath (400);
the sheath (400) is provided with a sheath far end (410) and a sheath near end (420), the sheath near end (420) is connected with the sheath shunt (430), the sheath shunt (430) is connected with the valve far end (320) of the Y-shaped valve (300), the sheath far end (410) is sleeved outside the inner rod far end (210), and the sheath far end (410) is provided with a sheath X-ray-proof mark (440);
the far end (210) of the inner rod is provided with a bracket bed (260) for sleeving a bracket; a far-end inner rod support mark (270) and a near-end inner rod support mark (280) are respectively arranged at two ends of the support bed (260) and used for blocking the movement of the support; the inner rod (200) at the near end side of the near end inner rod support mark (280) is sleeved with a coil (290), the inner rod (200) at the near end side of the coil (290) and the outer sheath (400) are provided with guide wire outlets (510), a guide wire (500) penetrates into a guide wire cavity (250) of the inner rod (200) from the outer sheath (400) and the guide wire outlets (510) on the inner rod (200) and penetrates out from an inner rod tip (230) to guide the movement of the inner rod (200).
8. The transfer system of claim 7,
the inner diameter of the guide wire cavity (250) is the same as the diameter of the guide wire (500), so that the guide wire (500) does not displace relative to the inner rod (200) during advancing.
9. The transfer system of claim 7,
the diameter of the proximal end of the inner shaft tip (230) is the same as the diameter of the distal end (410) of the outer sheath, and the diameter of the distal end of the inner shaft tip (230) is smaller than the diameter of the distal end (410) of the outer sheath.
10. The transfer system of claim 7,
the sheath distal end (410) diameter is greater than the sheath proximal end (420) diameter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022567474.8U CN215228885U (en) | 2020-11-09 | 2020-11-09 | Self-expanding support suitable for intracranial venous sinus and conveying system thereof |
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| CN202022567474.8U CN215228885U (en) | 2020-11-09 | 2020-11-09 | Self-expanding support suitable for intracranial venous sinus and conveying system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112353535A (en) * | 2020-11-09 | 2021-02-12 | 首都医科大学附属北京天坛医院 | Self-expanding support suitable for intracranial venous sinus and conveying system thereof |
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- 2020-11-09 CN CN202022567474.8U patent/CN215228885U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112353535A (en) * | 2020-11-09 | 2021-02-12 | 首都医科大学附属北京天坛医院 | Self-expanding support suitable for intracranial venous sinus and conveying system thereof |
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