技术领域technical field
本实用新型涉及医疗技术领域，具体涉及一种用于下腔静脉阻塞治疗的支架。The utility model relates to the field of medical technology, in particular to a bracket used for treating inferior vena cava obstruction.
背景技术Background technique
布加综合征(Budd-Chiari syndrome,BCS)是由各种原因所致的肝静脉流出道阻塞，可以发生在从肝小静脉到肝后段下腔静脉入右心房处的任何部位。肝静脉流出道阻塞可导致肝窦充血，缺血，最终导致肝窦细胞坏死，进一步发展可导致小叶纤维化，结节再生性增生以及肝硬化。Budd-Chiari syndrome (BCS) is hepatic venous outflow obstruction caused by various reasons, which can occur anywhere from the hepatic venules to the retrohepatic inferior vena cava entering the right atrium. Hepatic venous outflow obstruction can lead to hepatic sinusoidal congestion, ischemia, and eventually necrosis of hepatic sinusoidal cells, and further development can lead to lobular fibrosis, nodular regenerative hyperplasia, and cirrhosis.
布加综合征按照其阻塞位置可分为单纯下腔静脉型(仅有下腔静脉受累)、单纯肝静脉型(仅有一支或多支肝静脉受累)和混合型(下腔静脉和一支及以上肝静脉受累)；按照阻塞处的病变特点则可分为膜性阻塞和节段性狭窄。膜性阻塞可能伴有或不伴有血栓形成，如图1所示。Budd-Chiari syndrome can be divided into simple inferior vena cava type (only the inferior vena cava is involved), simple hepatic vein type (only one or more hepatic veins are involved) and mixed type (the inferior vena cava and one and above hepatic vein involvement); according to the lesion characteristics of the obstruction, it can be divided into membranous obstruction and segmental stenosis. Membranous obstruction may or may not be accompanied by thrombosis, as shown in Figure 1.
肝静脉阻塞或下腔静脉阻塞后能自发缓解的极为少见。近年来，介入技术的使用使BCS的治疗进入微创时代，由于阻塞部位的不同，西方国家多采用经颈内静脉肝内门体分流术治疗BCS，而中国的BCS多接受血管成形术±支架植入治疗，亦可取得了较好的长期结果。但是，我国当前在临床上使用的下肢静脉支架，其存在的重大缺陷为：Spontaneous resolution of hepatic vein occlusion or inferior vena cava occlusion is rare. In recent years, the use of interventional techniques has brought the treatment of BCS into a minimally invasive era. Due to the difference in the location of the obstruction, transjugular intrahepatic portosystemic shunt is often used in Western countries to treat BCS, while BCS in China mostly accepts angioplasty ± stent Implant therapy can also achieve better long-term results. However, the major defects of the lower extremity venous stents currently used clinically in my country are:
现有的支架采用圆柱形结构，即支架各个节段的外径一致，这样的支架在介入手术中使用时，由于随膈肌的运动；释放支架时血管狭窄对支架本身反向径向支撑力作用；下腔静脉在冠状位和矢状位上均有一定程度的角度；下腔静脉阻塞段以下明显扩张，支架打开后末节支架与下腔静脉不能有效贴合等不良因素，易发生支架位移，存在巨大的隐患；因此术中及术后支架可能会过度伸入右心房或滑脱至下腔静脉狭窄段以下，而不能起到有效的支撑作用，由于支架外部不能形成卡止结构，并因此，正常情况下，即使放置过程完全正确，上述移位的情况也较容易发生。The existing stent adopts a cylindrical structure, that is, the outer diameter of each segment of the stent is the same. When such a stent is used in an interventional operation, due to the movement of the diaphragm; ; The inferior vena cava has a certain degree of angle in the coronal and sagittal positions; the inferior vena cava is obviously expanded below the obstructed segment, and after the stent is opened, the distal stent and the inferior vena cava cannot be effectively fitted and other adverse factors are prone to stent displacement. There are huge hidden dangers; therefore, the stent may over-extend into the right atrium or slip below the stenosis of the inferior vena cava during and after the operation, and cannot play an effective supporting role, because the outside of the stent cannot form a locking structure, and therefore, Under normal circumstances, even if the placement process is completely correct, the above-mentioned displacement is relatively easy to occur.
有文献报道，现有的支架置入后，支架移位发生率约为2～3％，支架移位可引起心脏压塞、心率失常、心房壁刺破、心房主动脉瘘形成等严重并发症，多数情况下需要开胸手术处理。It has been reported in the literature that after the existing stents are implanted, the incidence of stent displacement is about 2-3%. Stent displacement can cause serious complications such as cardiac tamponade, arrhythmia, atrial wall puncture, and atrial-aortic fistula formation. In most cases, open thoracotomy is required.
基于上述问题，对于临床确实需要行下腔静脉支架植入的患者，介入医生常由于担心支架移位而放弃采用支架置入的疗法，只进行多次球囊扩张治疗，但这种治疗方式预后不佳，给患者带来很大的经济负担，并且患者生活质量差，甚至丧失其他治疗的可能。Based on the above problems, for patients who really need inferior vena cava stent implantation, interventional doctors often give up the treatment of stent placement due to concerns about stent displacement, and only perform multiple balloon dilatation treatments, but the prognosis of this treatment is Poor, bring great economic burden to patients, and the quality of life of patients is poor, and even lose the possibility of other treatments.
发明内容Contents of the invention
针对上述现有技术中存在的问题，发明人根据临床经验总结分析了下腔静脉阻塞特点，提供一种用于下腔静脉阻塞治疗的支架，该支架能有效应对各类下腔静脉阻塞，避免支架置入后出现滑移等情况，以解决现有技术存在的问题。In view of the above-mentioned problems in the prior art, the inventor summarized and analyzed the characteristics of inferior vena cava obstruction based on clinical experience, and provided a stent for the treatment of inferior vena cava obstruction, which can effectively deal with various types of inferior vena cava obstruction and avoid Sliding occurs after the stent is placed, so as to solve the problems existing in the prior art.
为了实现上述任务，本实用新型采用以下技术方案：In order to achieve the above tasks, the utility model adopts the following technical solutions:
一种用于下腔静脉阻塞治疗的支架，包括第一支撑环和第二支撑环，第一支撑环和第二支撑环具有弹性且均可以在径向上压缩，第一支撑环和第二支撑环同轴且间隔设置，第一支撑环和第二支撑环均至少设置一个，第二支撑环的外径小于第一支撑环的外径。A stent for treating inferior vena cava occlusion, comprising a first support ring and a second support ring, the first support ring and the second support ring are elastic and can be compressed in the radial direction, the first support ring and the second support ring The rings are coaxial and arranged at intervals, and at least one of the first support ring and the second support ring is provided, and the outer diameter of the second support ring is smaller than that of the first support ring.
进一步地，所述的构成支架的第一支撑环和第二支撑环中，相邻的支撑环之间通过弹性的连接杆进行连接。Further, in the first support ring and the second support ring constituting the stent, adjacent support rings are connected by elastic connecting rods.
进一步地，所述的第一支撑环设置一对而第二支撑环设置一个，第二支撑环位于所述的一对第一支撑环的中部。Further, there is a pair of first support rings and one second support ring, and the second support ring is located in the middle of the pair of first support rings.
进一步地，所述的第一支撑环、第二支撑环均设置一对，所述的一对第二支撑环位于一对第一支撑环之间。Further, a pair of the first support ring and the second support ring is provided, and the pair of second support rings is located between the pair of first support rings.
进一步地，所述的第一支撑环设置三个而第二支撑环设置一个，排布方式为，在轴向上，依次为一个第一支撑环、第二支撑环和一对第一支撑环。Further, there are three first support rings and one second support ring, and the arrangement is, in the axial direction, sequentially a first support ring, a second support ring and a pair of first support rings .
进一步地，所述的第一支撑环由多根第一支杆在圆周方向上相互连接构成，每相邻的两根第一支杆均呈“八”字形结构，且相邻的两根第一支杆之间通过设置在第一支杆端部的第一承接环连接。Further, the first support ring is composed of a plurality of first support rods connected to each other in the circumferential direction, and each two adjacent first support rods have a "eight" shape structure, and two adjacent first support rods The rods are connected through the first receiving ring arranged at the end of the first rod.
进一步地，所述的第一承接环为圆形环或椭圆形环，在第一承接环上开设有缺口，所述的第一支杆连接在第一承接环的缺口上。Further, the first receiving ring is a circular ring or an elliptical ring, and a notch is opened on the first receiving ring, and the first support rod is connected to the notch of the first receiving ring.
进一步地，相邻的第一支撑环和第二支撑环之间的连接杆的一端固定在第一支撑环的内侧，另一端固定在第二支撑环的外侧。Further, one end of the connecting rod between the adjacent first support ring and the second support ring is fixed on the inside of the first support ring, and the other end is fixed on the outside of the second support ring.
进一步地，所述的第二支撑环的内径为20～25mm。Further, the inner diameter of the second supporting ring is 20-25 mm.
进一步地，所述的第一支撑环的内径为25～30mm，第一支撑环在支架轴向上的长度为10～25mm。Further, the inner diameter of the first support ring is 25-30 mm, and the length of the first support ring in the axial direction of the stent is 10-25 mm.
进一步地，所述的构成支架的第一支撑环和第二支撑环中，相邻的支撑环之间的间距为1～5mm。Further, in the first support ring and the second support ring constituting the stent, the distance between adjacent support rings is 1-5 mm.
本实用新型具有以下技术特点：The utility model has the following technical characteristics:
1.本实用新型的支架，采用了外径不一的结构设计，使得支架在置入后，可利用阻塞位置形成一种卡止结构，对支架位置进行有效的固定，防止支架置入后在静脉内发生滑移等情况，同时也对阻塞部位进行了有效的疏通和支撑；1. The bracket of this utility model adopts a structural design with different outer diameters, so that after the bracket is placed, it can use the blocking position to form a locking structure, effectively fix the position of the bracket, and prevent the bracket from being damaged after being placed. In the case of slippage in the vein, it also effectively dredged and supported the blocked part;
2.本实用新型可采用不同的节段性组合方式，对于不同类型的阻塞，可针对性地置入合适的支架，较现有的统一规格的直型支架结构相比，本实用新型的这种支架不仅有效避免了滑移的情况，而且针对性强、支撑效果好、预后佳；2. The utility model can adopt different segmental combinations. For different types of blockages, suitable brackets can be placed in a targeted manner. Compared with the existing straight bracket structure of uniform specifications, this utility model This kind of stent not only effectively avoids slippage, but also has strong pertinence, good support effect and good prognosis;
3.本实用新型结构简单，可应用在现有的介入器械上，操作方便；经发明人团队实际使用验证，该支架的多个置入例中，没有发生移位情况，取得了理想的长期效果。3. The utility model has a simple structure, can be applied to existing interventional instruments, and is easy to operate; it has been verified by the inventor's team that there is no displacement in multiple placement cases of the bracket, and an ideal long-term Effect.
附图说明Description of drawings
图1为背景技术中提到的肝静脉阻塞的不同分类示意图，其中图1(a)为膜性阻塞，图1(b)为节段性狭窄，图1(c)、图1(d)为膜性阻塞伴有血栓形成的两种情况，图1(e)为长段狭窄；Figure 1 is a schematic diagram of different classifications of hepatic vein obstruction mentioned in the background technology, wherein Figure 1(a) is membranous obstruction, Figure 1(b) is segmental stenosis, Figure 1(c), Figure 1(d) These are two cases of membranous obstruction accompanied by thrombus formation, and Figure 1(e) shows long-segment stenosis;
图2、图4和图5为本实用新型的结构示意图，其中，图2为一对第一支撑环和一个第二支撑环构成的支架，图4为一对第一支撑环和一对第二支撑环构成的支架，图5为三个第一支撑环和一个第二支撑环构成的支架；Fig. 2, Fig. 4 and Fig. 5 are structural schematic diagrams of the present utility model, wherein, Fig. 2 is the support that a pair of first support rings and a second support ring constitute, Fig. 4 is a pair of first support rings and a pair of second support rings The support that two support rings constitute, Fig. 5 is the support that three first support rings and a second support ring form;
图3为实施例1的结构展开示意图；Fig. 3 is the schematic diagram of the structure expansion of embodiment 1;
图中标号代表：1—第一支撑环，2—第二支撑环，3—连接杆，11—第一承接环，12—第一支杆，21—第二承接环，22—第二支杆。The symbols in the figure represent: 1—first support ring, 2—second support ring, 3—connecting rod, 11—first receiving ring, 12—first support rod, 21—second receiving ring, 22—second branch pole.
具体实施方式detailed description
目前临床上使用的下腔静脉支架在使用过程中由于存在位移的风险，使得支架的置入存在很大的危险性，一定程度上限制了医生的使用和介入技术的发展，然而通过介入治疗下腔静脉阻塞却是一种疗效显著的方法，并且支架置入的方法已经是中华医学会放射学分会介入学组布加综合征介入诊疗规范的专家共识。Due to the risk of displacement of the inferior vena cava stent currently used clinically, the placement of the stent is very risky, which limits the use of doctors and the development of interventional technology to a certain extent. However, vena cava occlusion is a method with significant curative effect, and the method of stent placement has been the expert consensus of the Interventional Diagnosis and Treatment Standards for Budd-Chiari Syndrome of the Interventional Group of the Radiology Branch of the Chinese Medical Association.
在医学上，通常将右心房至肾静脉汇入处的下腔静脉称为肝后段下腔静脉，可以分为心包内段[右心房至膈肌的下腔静脉裂孔]，长度大约为24±8mm，肝上膈下段[肝右静脉上缘至下腔静脉裂孔]，长度大约为11.4±5.7mm，肝后段[肝静脉注入下腔静脉处至肝右后下静脉间]，其长度大约为63±12mm。下腔静脉膜性阻塞或狭窄多发生在心包内段，这段的长度为24±8mm。In medicine, the inferior vena cava from the right atrium to the confluence of the renal vein is usually referred to as the posthepatic inferior vena cava, which can be divided into the intrapericardial segment [the right atrium to the inferior vena cava hiatus of the diaphragm], with a length of about 24± 8mm, the lower part of the suprahepatic diaphragm [from the upper edge of the right hepatic vein to the hiatus of the inferior vena cava], the length is about 11.4±5.7 mm, the posterior part of the liver [the place where the hepatic vein injects into the inferior vena cava to the right posterior inferior vein of the liver], the length is about It is 63±12mm. The membranous obstruction or stenosis of the inferior vena cava mostly occurs in the pericardial segment, and the length of this segment is 24±8mm.
发明人在长期的临床治疗过程中，充分分析各类病例、病因，并结合我国发病人群的发病特点，提出了一种能有效解决移位问题的支架，解决现有支架存在的问题，并取得了显著的疗效。具体结构介绍如下:In the course of long-term clinical treatment, the inventor fully analyzed various cases and causes, and combined with the characteristics of the diseased population in my country, proposed a stent that can effectively solve the problem of displacement, solve the problems existing in the existing stents, and obtain significant curative effect. The specific structure is introduced as follows:
如图2至图5所示，本实用新型提供了一种用于下腔静脉阻塞治疗的支架，包括第一支撑环1和第二支撑环2，第一支撑环1和第二支撑环2具有弹性且均可以在径向上压缩，第一支撑环1和第二支撑环2同轴且间隔设置，第一支撑环1和第二支撑环2均至少设置一个，第二支撑环2的外径小于第一支撑环1的外径。构成支架的第一支撑环1和第二支撑环2中，相邻的支撑环之间通过弹性的连接杆3进行连接。As shown in Figure 2 to Figure 5, the utility model provides a stent for the treatment of inferior vena cava obstruction, including a first support ring 1 and a second support ring 2, the first support ring 1 and the second support ring 2 It is elastic and can be compressed in the radial direction. The first support ring 1 and the second support ring 2 are coaxial and spaced apart. At least one of the first support ring 1 and the second support ring 2 is provided. The outer part of the second support ring 2 The diameter is smaller than the outer diameter of the first support ring 1. Among the first support ring 1 and the second support ring 2 constituting the stent, adjacent support rings are connected by elastic connecting rods 3 .
本方案中所说的第一支撑环1和第二支撑环2，自然状态下，即未收到外力的状态下，第一支撑环1和第二支撑环2在圆周方向上均为环形或近似环形结构。第一支撑环1和第二支撑环2均采用医用金属材料制成，如不锈钢或镍钛合金等。这种材质的特点是韧性好，强度高，且具有较好的弹性。The first support ring 1 and the second support ring 2 mentioned in this program, in the natural state, that is, in the state of no external force, the first support ring 1 and the second support ring 2 are both ring-shaped or ring-shaped in the circumferential direction. Approximate ring structure. Both the first support ring 1 and the second support ring 2 are made of medical metal materials, such as stainless steel or nickel-titanium alloy. This material is characterized by good toughness, high strength, and good elasticity.
该支架通过微创的介入手术置入下腔静脉中，对下腔静脉阻塞段进行支撑，以保证血运通畅。为了和介入设备配合，本方案中第一支撑环1和第二支撑环2均可以在径向上压缩，即对第一支撑环1和第二支撑环2施加径向上的力度，支撑环将会向其轴心处收缩，内径减小。第一支撑环1、第二支撑环2的结构密度都比较低，因此可以在径向上进行大幅度压缩，便于放置到输送鞘管中；通过介入设备将支架输送到合适的位置后推出鞘管进行释放，此时支撑环失去束缚，将在径向上进行扩张，从而对阻塞位置进行支撑。The stent is placed into the inferior vena cava through a minimally invasive interventional operation to support the blocked segment of the inferior vena cava to ensure smooth blood supply. In order to cooperate with the interventional equipment, both the first support ring 1 and the second support ring 2 can be compressed in the radial direction in this solution, that is, the force in the radial direction is applied to the first support ring 1 and the second support ring 2, and the support ring will be Shrinking toward its axis, the inner diameter decreases. The structural density of the first support ring 1 and the second support ring 2 is relatively low, so they can be greatly compressed in the radial direction, which is convenient to be placed in the delivery sheath; the stent is delivered to a suitable position through the interventional device and then pushed out of the sheath Upon release, the support ring becomes unconstrained and expands radially to support the occlusion.
图1(a)至图1(e)给出了下腔静脉阻塞的典型分类，通过观察可以发现，以下腔静脉整体为观察对象，下腔静脉在阻塞段内径发生了明显的变化。直型结构的现有支架之所以发生移位，是由于支架除了与阻塞段接触的位置之外，其余部分均不能有效地与下腔静脉内壁贴合，而无法形成卡止样结构，因此固定不牢靠，在置入后支架容易发生移位。Figure 1(a) to Figure 1(e) show the typical classification of IVC obstruction. Through observation, it can be found that the IVC as a whole is the object of observation, and the inner diameter of the IVC in the obstructed segment has changed significantly. The reason why the existing stent with a straight structure is displaced is that except for the position where the stent is in contact with the obstructed segment, the rest of the stent cannot effectively adhere to the inner wall of the inferior vena cava and cannot form a locking structure. Unreliable, the stent is prone to shift after placement.
本实用新型中为了解决这个问题，采用了变外径的设计方式，即构成支架的第一支撑环1和第二支撑环2的外径不同，其中，第一支撑环1用于支撑在下腔静脉内壁非阻塞段，而第二支撑环2支撑在阻塞段。这样的哑铃型结构，使得阻塞段两端形成了对于支架的卡止结构，第一支撑环1的端部将卡在阻塞位置的两端，因此支架置入后，在血管轴向上的运动趋势将能被有效抵消，即便受到各种外界因素的影响，支架的位置能始终保持稳固；加之支撑环具有弹性，因此能有效地和血管内壁、阻塞段贴合；而第二支撑环2将阻塞段支撑后，其内部为血流提供了通道。In order to solve this problem in the utility model, adopt the design mode of variable outer diameter, namely the outer diameters of the first support ring 1 and the second support ring 2 that constitute the bracket are different, wherein, the first support ring 1 is used to support in the lower cavity The inner wall of the vein is at the non-blocking section, while the second support ring 2 is supported at the blocking section. Such a dumbbell-shaped structure makes the two ends of the blocking section form a locking structure for the stent, and the end of the first support ring 1 will be stuck at the two ends of the blocking position, so after the stent is placed, the movement in the axial direction of the blood vessel The trend will be effectively counteracted, even if affected by various external factors, the position of the stent can always remain stable; in addition, the support ring has elasticity, so it can effectively fit the inner wall of the blood vessel and the blocked segment; and the second support ring 2 will After the obstructed segment is supported, its interior provides a channel for blood flow.
如图3所示，为图2所示支架展开后的结构示意图。从图中可以看到，第一支撑环1由多根第一支杆12在圆周方向上相互连接构成，每相邻的两根第一支杆12均呈“八”字形结构，且相邻的两根第一支杆12之间通过设置在第一支杆12端部的第一承接环11连接；具体地，第一承接环11为圆形环或椭圆形环，在第一承接环11上开设有缺口，缺口使第一支撑环1构成优弧结构，所述的第一支杆12连接在第一承接环11的缺口上。这样的结构，使得支架不仅结构轻巧，而且有利于支架材料发挥弹性性能，并且端部采用了第一承接环11这种钝圆形设计，使得整个支架无尖锐端，使用过程更加安全。第一承接环11使得相邻的第一支杆12的端部之间存在一定间隙，因此第一支撑环1在径向压缩时，将能有更大的压缩幅度，并且弹性更好。As shown in FIG. 3 , it is a schematic diagram of the structure of the stent shown in FIG. 2 after deployment. It can be seen from the figure that the first supporting ring 1 is composed of a plurality of first struts 12 connected to each other in the circumferential direction. The two first support rods 12 are connected by the first receiving ring 11 arranged at the end of the first support rod 12; specifically, the first receiving ring 11 is a circular ring or an oval ring, and the first receiving ring 11 is provided with a gap, the gap makes the first support ring 1 form a superior arc structure, and the first support rod 12 is connected to the gap of the first receiving ring 11 . Such a structure makes the bracket not only light in structure, but also conducive to the elastic performance of the bracket material, and the blunt round design of the first receiving ring 11 is adopted at the end, so that the whole bracket has no sharp end, and the use process is safer. The first receiving ring 11 allows a certain gap to exist between the ends of the adjacent first struts 12 , so that the first supporting ring 1 can have a larger compression range and better elasticity when compressed in the radial direction.
同样地，第二支撑环2和第一支撑环1的构成结构相同，由第二支杆22和第二承接环21构成，不同的是第二支杆22较第一支杆12端，且第二承接环21更小一些。在第一承接环11和第二承接环21中，相邻的第一支杆12之间、相邻的第二支杆22之间的夹角范围为30°～60°，夹角的大小决定了在周向上支杆的个数，过小则周向密度过大，影响压缩性能，而过大则影响整个支架的结构强度。Similarly, the second support ring 2 has the same structure as the first support ring 1, and is composed of a second support rod 22 and a second receiving ring 21. The difference is that the second support rod 22 is at the end of the first support rod 12, and The second receiving ring 21 is smaller. In the first receiving ring 11 and the second receiving ring 21, the included angle between adjacent first struts 12 and adjacent second struts 22 ranges from 30° to 60°, the size of the included angle Determines the number of struts in the circumferential direction. If it is too small, the circumferential density will be too large, which will affect the compression performance, and if it is too large, the structural strength of the entire support will be affected.
本方案中如图2所示，支撑环之间通过弹性的连接杆3连接。相邻的支撑环之间只需要保证连接强度即可，因此本方案中精简了连接方式，采用支撑杆进行连接，使整个支架结构更加轻巧，且不影响支架在周向性能的发挥。In this solution, as shown in FIG. 2 , the support rings are connected by elastic connecting rods 3 . It is only necessary to ensure the connection strength between adjacent support rings. Therefore, in this scheme, the connection method is simplified and the support rods are used for connection, which makes the entire support structure lighter and does not affect the performance of the support in the circumferential direction.
如图所示，相邻的第一支撑环1和第二支撑环2之间的连接杆3的一端固定在第一支撑环1的内侧，另一端固定在第一支撑环1的外侧。这样设置的目的是，第一支撑环1和第二支撑环2的外径之间存在差距，采用这样的固定方式能尽量减小连接杆3在轴向上的偏移，从而使得第二支撑环2能处于正中位置。As shown in the figure, one end of the connecting rod 3 between the adjacent first supporting ring 1 and the second supporting ring 2 is fixed on the inner side of the first supporting ring 1 , and the other end is fixed on the outer side of the first supporting ring 1 . The purpose of this setting is that there is a gap between the outer diameters of the first support ring 1 and the second support ring 2, and such a fixing method can minimize the offset of the connecting rod 3 in the axial direction, so that the second support ring Ring 2 can be in a neutral position.
经过发明人对大量实例的统计、分析以及结合本实用新型的支架结构，关于支架的具体涉及参数：对于第二支撑环2，其内径为20～25mm，可保证第二支撑环2的支撑强度，同时能很好地适用于各类阻塞段，对于不同类型的阻塞，均可建立有效的血流通道；第一支撑环1的内径为25～35mm，第一支撑环1在支架轴向上的长度为10～25mm，其中，当某个第一支撑环1位于近心端时，该第一支撑环1的长度较其他第一支撑环1的长度短一些，长度选择范围为10～20mm，例如15mm、18mm等；而构成支架的第一支撑环1和第二支撑环2中，相邻的支撑环之间的间距为1～5mm。Through statistics and analysis of a large number of examples by the inventor and in combination with the bracket structure of the present invention, the specific parameters related to the bracket: for the second support ring 2, its inner diameter is 20-25mm, which can ensure the support strength of the second support ring 2 , at the same time, it can be well applied to various occlusion segments, and effective blood flow channels can be established for different types of occlusion; the inner diameter of the first support ring 1 is 25-35mm, and the first support ring 1 is in the axial direction of the stent The length of the first support ring 1 is 10-25mm, wherein, when a certain first support ring 1 is located at the proximal end, the length of the first support ring 1 is shorter than the length of other first support rings 1, and the length selection range is 10-20mm , such as 15 mm, 18 mm, etc.; and in the first support ring 1 and the second support ring 2 constituting the stent, the distance between adjacent support rings is 1-5 mm.
图2给出的这个实施例中，第一支撑环1设置一对而第二支撑环2设置一个，第二支撑环2位于所述的一对第一支撑环1的中部，该支架结构适用于膜性阻塞、节段性狭窄；In the embodiment shown in Figure 2, a pair of first support rings 1 is provided and one second support ring 2 is provided, and the second support ring 2 is located in the middle of the pair of first support rings 1. This support structure is suitable for Due to membranous obstruction and segmental stenosis;
如图4给出的这个实施例中，第一支撑环1、第二支撑环2均设置一对，所述的一对第二支撑环2位于一对第一支撑环1之间，这种支架适用于膜性阻塞伴有血栓形成、长段狭窄的情况；In this embodiment shown in Figure 4, a pair of first support rings 1 and second support rings 2 are provided, and the pair of second support rings 2 is located between a pair of first support rings 1. The stent is suitable for cases of membranous obstruction accompanied by thrombosis and long-segment stenosis;
图5给出的这个实施例中，第一支撑环设置三个而第二支撑环2设置一个，排布方式为，在轴向上，依次为一个第一支撑环1、第二支撑环2和一对第一支撑环1，可以适用于膜性阻塞、节段性狭窄或其他情况。In the embodiment shown in Figure 5, three first support rings are provided and one second support ring 2 is provided. The arrangement is, in the axial direction, one first support ring 1 and one second support ring 2. And a pair of first support rings 1, can be applicable to membranous obstruction, segmental stenosis or other situations.
上述的三种支架结构可以适用于绝大多数阻塞情况，需要说明的是，手术医生可以根据下腔静脉阻塞的实际情况，选择最为合适的一种支架结构；并且支架结构也不限于上述三种，第一支撑环1和第二支撑环2在轴向上也可以有其他形式的排布。The above three stent structures can be applied to most obstruction situations. It should be noted that the surgeon can choose the most suitable stent structure according to the actual situation of inferior vena cava obstruction; and the stent structure is not limited to the above three , the first support ring 1 and the second support ring 2 may also be arranged in other forms in the axial direction.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621384816.XUCN206651896U (en) | 2016-12-16 | 2016-12-16 | A kind of support for inferior vena cava obstruction treatment |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621384816.XUCN206651896U (en) | 2016-12-16 | 2016-12-16 | A kind of support for inferior vena cava obstruction treatment |
| Publication Number | Publication Date |
|---|---|
| CN206651896Utrue CN206651896U (en) | 2017-11-21 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621384816.XUExpired - Fee RelatedCN206651896U (en) | 2016-12-16 | 2016-12-16 | A kind of support for inferior vena cava obstruction treatment |
| Country | Link |
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| CN (1) | CN206651896U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107951601A (en)* | 2017-12-08 | 2018-04-24 | 成都迈德克科技有限公司 | A kind of reducing type intravascular stent, erecting device and its installation method |
| CN112153946A (en)* | 2018-04-04 | 2020-12-29 | 因库麦迪斯有限公司 | Embolization device with improved neck coverage |
| CN112472360A (en)* | 2020-11-25 | 2021-03-12 | 四川大学华西医院 | Vena cava stent |
| CN114269296A (en)* | 2019-05-08 | 2022-04-01 | Dp控股(英国)有限公司 | Methods and devices for the treatment of syndromes and morbidities caused by compression, occlusion, venous caliber, and occlusion of the iliac cavity |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107951601A (en)* | 2017-12-08 | 2018-04-24 | 成都迈德克科技有限公司 | A kind of reducing type intravascular stent, erecting device and its installation method |
| CN112153946A (en)* | 2018-04-04 | 2020-12-29 | 因库麦迪斯有限公司 | Embolization device with improved neck coverage |
| CN112153946B (en)* | 2018-04-04 | 2024-05-28 | 因库麦迪斯有限公司 | Embolic device with improved neck coverage |
| CN114269296A (en)* | 2019-05-08 | 2022-04-01 | Dp控股(英国)有限公司 | Methods and devices for the treatment of syndromes and morbidities caused by compression, occlusion, venous caliber, and occlusion of the iliac cavity |
| CN112472360A (en)* | 2020-11-25 | 2021-03-12 | 四川大学华西医院 | Vena cava stent |
| Publication | Publication Date | Title |
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| CN206651896U (en) | A kind of support for inferior vena cava obstruction treatment | |
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| Date | Code | Title | Description |
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| CF01 | Termination of patent right due to non-payment of annual fee | Granted publication date:20171121 |