CN106725996A - Vena cava filter - Google Patents

Vena cava filter Download PDF

Info

Publication number
CN106725996A
CN106725996A CN201611100007.6A CN201611100007A CN106725996A CN 106725996 A CN106725996 A CN 106725996A CN 201611100007 A CN201611100007 A CN 201611100007A CN 106725996 A CN106725996 A CN 106725996A
Authority
CN
China
Prior art keywords
struts
twisted
end
vena cava
cava filter
Prior art date
Application number
CN201611100007.6A
Other languages
Chinese (zh)
Other versions
CN106725996B (en
Inventor
张庭超
王永胜
李阳
Original Assignee
杭州唯强医疗科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 杭州唯强医疗科技有限公司 filed Critical 杭州唯强医疗科技有限公司
Priority to CN201611100007.6A priority Critical patent/CN106725996B/en
Publication of CN106725996A publication Critical patent/CN106725996A/en
Application granted granted Critical
Publication of CN106725996B publication Critical patent/CN106725996B/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01Filters implantable into blood vessels
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/01Filters implantable into blood vessels
    • A61F2002/016Filters implantable into blood vessels made from wire-like elements

Abstract

The invention discloses a vena cava filter. The vena cava filter comprises a plurality of support rods, wherein one end of each of the support rods is gathered, and the other end of each of the support rods is radially dispersed under a releasing state; at least one part of the support rods are twisting support rods which are respectively formed by twisting a plurality of metal wires; each twisting support rod is formed by twisting two or more metal wires; the diameters of the metal wires on the same twisting support rod are the same or are different; at least one metal wire of each twisting support rod is bent at a part close to the radial end to form an anchor hook. The vena cava filter has the advantages that the strength is higher, the compliance is better, the releasing and recycling process is smooth, and the falling and dislocation risks are avoided.

Description

一种腔静脉滤器 One kind of vena cava filter

技术领域 FIELD

[0001] 本发明涉及医疗器械领域,具体涉及一种腔静脉滤器。 [0001] The present invention relates to the field of medical devices, particularly, to a vena cava filter.

背景技术 Background technique

[0002] 肺栓塞(PE)是常见的健康问题,且是所有年龄群中导致死亡的主要原因。 [0002] pulmonary embolism (PE) is a common health problem, and is the leading cause of death in all age groups in the lead. 大多数肺栓塞由下肢或骨盆内的深静脉血栓(DVT)导致,在身体的某一个部位形成的血凝块可能通过静脉迀移回到心脏并进入肺中,由于血凝块堵塞使通向肺的部分血液和氧供给切断而导致肺梗塞。 Most pulmonary embolism caused by deep vein thrombosis (DVT) in the lower extremities or pelvis, blood clots in certain parts of the body formed may shift back to the heart through a vein Gan and into the lungs due to blood clots blocking the access to some of the blood and oxygen supply lungs cutting resulting pulmonary embolism.

[0003] 有资料统计,不经治疗的肺栓塞的死亡率为20%-30%,每年新增病例约占总人口的0.2%。 [0003] There are statistics, without treatment of pulmonary embolism mortality rate was 20% -30% annual new cases of the total population of 0.2%. 腔静脉滤器被证实在临床上可降低肺栓塞的发生率,滤器分为永久植入滤器和临时性滤器,滤器在植入体内时,若植入位置不当或滤器发生倾斜,需采用抓捕器回收滤器后再重新释放。 Vena cava filters is demonstrated in clinical can reduce the incidence of pulmonary embolism filter into permanently implanted filters and temporary filters, filters when implanted in vivo, when implanted in improper positions or a filter is tilted, requires the use of capture device recycling filter and re-released. 永久滤器是一种植入体内后不再取出,永久留在下腔静脉血管内的滤器;临时性滤器,也称可回收滤器,先把该滤器植入病人体内,当下肢血栓源消失或肺栓塞的发生风险降低或消失后,需及时将滤器从病人体内取出,以避免滤器支杆部分表面被内皮爬覆,导致取出滤器时牵拉和损伤血管组织,无法回收滤器。 Permanent filter after an implant body is no longer removed, remain permanently within the next chamber vein filters; temporary filters, also known as retrievable filters, put the filter into the patient, when the lower extremity thrombosis source disappear or pulmonary embolism the risk is reduced or eliminated, the need for timely filters were removed from the patient, to avoid filter strut portion surface of endothelial climb coating resulting when removing the filter is pulled and damaged vascular tissue can not be recovered filter.

[0004] 现有技术中,多支杆滤器(指由多根支杆呈放射状组装而成的滤器),是一种广泛应用的临时性滤器,如CookCelect®滤器,BradG2(?)x滤器,Bard Meridian™滤器和Boston Scientific TGF/SGF滤器等,多支杆滤器的特征在于至少有多根支杆的末端带有防止器械移位的锚形钩(器械上防止移位或者掉落的一类部件或者装置,通常为弯勾或者倒刺形状)。 [0004] The prior art multi-pole filter (defined by the plurality of struts radially assembled from filter), temporary filter a widely used, such as CookCelect® filter, BradG2 (?) X filter, Bard Meridian ™ filter and Boston Scientific TGF / SGF filter or the like, wherein a multi-pole filter that at least a plurality tip support rods with preventing prevent displacement or drop the anchor-shaped hook device displaceable (instrument a class components or apparatus, generally hook or barb shape is curved).

[0005] 锚形钩可以通过焊接的方式与支杆固定连接,如Brad Meridian™滤器,支杆的末端焊接有锚定勾,这种焊接结构为了达到焊接的物理强度和稳定性,会增大焊点的尺寸,因此增大滤器的尺寸。 [0005] The anchor-shaped hook may be fixedly connected by welding with a rod, such as Brad Meridian ™ filter, the end of the strut welded to the anchoring hook, this welded structure in order to achieve physical strength and stability of the welding increases pad size, thus increasing the size of the filter. 由于锚形钩的尺寸相对于支杆的直径较大,产生了凸台或者凸点,而当把滤器收入较小的鞘管时,会出现卡顿,严重时会难以回收;另外焊接的锚形钩由于较硬不容易变形,因此也不容易回收;滤器作为心血管植入医疗器械,植入体内后器械会随血管的搏动不停的运动,焊接部位的疲劳强度相对于非焊接部位会下降。 Since the size of the anchor-shaped hooks relative to the larger diameter of the struts, resulting in a projection or bump, while when the smaller filter revenue sheath will Caton, severe may be difficult to recover; additional welding anchor shaped hooks because hard not easily deformed, and therefore not easily recovered; filter cardiovascular implantable medical devices, after implantation instrument will vary with pulsating blood vessel constant motion, the fatigue strength of the welded portion with respect to the non-welded parts will decline.

[0006] 锚形钩也可以通过绕制的方式与支杆固定,如专利CN103079497B所涉及的方案, 在多支杆的末端绕制金属线圈,金属线圈的末端带有突出的细丝用于增强支撑件和血管壁的相互作用,这种方案的缺点在于支杆绕制金属线圈后,该部位的直径会大于支杆的直径形成一个台阶,把滤器收入较小的鞘管时,会出现卡顿,严重时会难以回收;同时金属线圈在光滑的支杆的上难以固定,在滤器收入鞘管中输送或回撤的过程中,金属线圈很容易移位,严重时甚至滑脱,遗留在患者体内。 [0006] The anchor-shaped hook can also wound manner struts fixed Scheme Patent CN103079497B involved, at the end of a multi-strut winding terminal metal coils, metal coils with projecting filaments for enhancing when the interaction of the support member and the vessel wall, disadvantage of this solution is that the rear strut wound metal coil, the diameter of this portion will be greater than the diameter of the strut is formed a stepped, the smaller filter revenue sheath will card Dayton, severe may be difficult to recover; while the metal coil is difficult to fix on a smooth struts, during transport or retracement in the filter its sheath tube, the metal coil is easily displaced, even when serious slip, left in the patient in vivo.

[0007] 锚形钩还可以通过支杆直接定型而成,如专利CN101031254A所涉及的方案,锚形钩为支杆的一部分,支杆末端直接弯曲定型形成锚形钩,这种方案的缺点在于若选择的丝杆较粗,则锚形钩回收力很大,难以回收至导管内,同时也容易撕裂血管内壁;若丝杆选择较细,则滤器径向支撑力不足,锚形钩难以与血管内壁形成锚定作用,在血流的冲击下很容易造成器械移位。 [0007] The anchor-shaped hook may also be shaped by the struts is directly formed, as shown in Scheme Patent CN101031254A involved, anchor-shaped hook as part of the struts, strut end directly curved shape forming an anchor-shaped hook disadvantage of this solution is that If the selected screw thick, the anchor large shaped hook recovery force, are difficult to recycle into the conduit, and also tear easily vascular wall; if screw selected smaller, then filter radially supporting force is insufficient, an anchor-shaped hook difficult an anchoring effect are formed with the blood vessel wall, under the impact of blood flow is likely to cause the instrument displaced.

[0008] 另外,这种弯曲的锚形钩通常为一光滑的丝杆,刺入血管壁后因为没有限位阻挡, 会导致锚形钩刺入血管壁更深,而导致滤器不能回收出体外,针对这一问题,美国专利US20130138137在支杆的末端焊接一个凸起,以防止刺入过深,但这种方案的缺点是,焊接工艺难度高,强度低,同时凸起在丝杆上形成一个台阶,不利于器械输送或者回收。 [0008] Further, the curved anchor-shaped hook is generally a smooth screw, piercing the vessel wall because there is no limit stop, will cause the anchor hook pierce the vessel wall deeper, resulting in a filter can not be recovered out of the body, to solve this problem, U.S. Patent No. US20130138137 welded a projection at the end of the strut to prevent piercing too deep, but the disadvantage of this solution is that the high welding process difficult, low intensity, while the projection on the screw forming a step, is not conducive instrument delivery or recovery.

[0009] 综上所述,多支杆滤器中的支杆末端一般带有锚形钩,但是不同结构的锚形钩都有不同的缺陷,具体如下: [0009] In summary, the strut end multi-pole filter is generally with an anchor-shaped hook, the anchor hook different structures have different drawbacks, as follows:

[0010] a、采用焊接的方式将锚形钩连接在支架上,会增大支杆的直径,滤器在收入鞘管和释放过程中会产生卡顿,且焊接部位也会成为滤器的强度薄弱处; Won] b、采用焊接、绕制等方式将锚形钩连接在支架上,可能有脱落、位移或者断裂的风险; [0010] a, welding manner anchor hook attached to the holder, increases the diameter of the struts of the filter in the income of the sheath and releasing process will produce Caton, and the welded portions will also become the filter strength is weak at; Won] b, welding, winding, etc. the anchor-shaped hook attached to the holder, may be depilated, displacement or the risk of breakage;

[0012] c、支杆直接定型而成的锚形钩由于没有限位措施,容易造成刺入过深,使滤器难以从血管壁中取出; [0012] c, struts directly stereotypes anchor-shaped hook since there is no limit measures, likely to cause piercing too deeply, so that the filter is difficult to remove from the vessel wall;

[0013] d、支杆直接定型而成的锚形钩在保证支杆的径向支撑力的同时,难以发生形变, 顺应性不足,造成滤器难以从血管中拔出收入鞘管中。 [0013] d, struts directly stereotypes of anchor hooks to ensure radial force strut, while it is difficult to deform, inadequate compliance, resulting in a filter is difficult to pull out his sheath tube from the vessel.

发明内容 SUMMARY

[0014] 本发明提供了一种腔静脉滤器,具有较高的强度以及较好的顺应性,释放以及回收过程顺畅,且没有脱落移位等风险。 [0014] The present invention provides a vena cava filter, having a higher strength and better compliance, the release and recovery was smooth, and no off displacement and other risks.

[0015] 一种腔静脉滤器,包括多根支杆,各支杆的一端相互聚拢,另一端在释放状态下辐射发散,至少一部分支杆为由多根金属丝捻绕而成的加捻支杆。 [0015] A vena cava filter, comprising a plurality of struts, one end of each strut of each gather, the other end of the radiation divergence in the released state, at least a portion of the struts by the plurality of wires twisting obtained by twisting branched bar.

[0016] 通常情况下,加捻支杆至少为两根,加捻支杆的长度可以相同也可以不同,每根加捻支杆由两根以上的金属丝捻绕而成。 [0016] Generally, twisted struts of at least two, the length of the twisted struts may be the same or different, each twisted struts around by more than two wires twisted together.

[0017] 各支杆的一端通过一连接件聚拢固定作为聚拢端,另一端在释放状态下辐射发散作为发散端。 [0017] One end of each strut through a connecting member gather fixed as gathered end and the other end in the released state radiated emissions as a divergent end.

[0018] 连接件可以为筒状,对于可回收的腔静脉滤器,连接件上设有回收钩。 [0018] The connecting member may be cylindrical, for recyclable vena cava filters, provided the recovery hook connection.

[0019] 腔静脉滤器在体内释放后,一方面需要具有足够的强度以提供支撑力,有效阻挡血栓的通过,另一方面,也需要具有良好的顺应性,能够顺畅地由鞘管中释放以及回收入鞘管中,在腔静脉滤器中使用加捻支杆,能够同时满足强度以及顺应性的需求。 [0019] vena cava filter after the release in the body, one needs to have sufficient strength to provide support force, effectively blocked by the thrombus, on the other hand, also required to have excellent conformability, can be smoothly released from the sheath as well as recovering the sheath tube, a twisted struts vena cava filter, it is possible to meet the strength and compliance requirements simultaneously.

[0020] 金属丝可以采用不锈钢、镍钛合金、钴铬合金或钛合金材质中的一种或多种,金属丝的丝径范围为0.05〜0.5mm。 [0020] The wire may be stainless steel, wire diameter range of nickel-titanium alloy, cobalt chromium alloy or titanium alloy material of one or more of the wire is 0.05~0.5mm.

[0021] 同一加捻支杆中的各金属丝的直径可以根据需要进行选择,通过调整丝径的不同,使加捻支杆满足强度以及顺应性的要求。 [0021] The diameter of each wire in the same twisted struts may be selected as desired, by various adjusting the wire diameter, the twist struts meet the strength and compliance requirements. 作为优选,同一加捻支杆的各金属丝等径或不完全等径。 Advantageously, the same twisted struts each metal wire diameter, or such as incomplete path.

[0022] 部分支杆上设有靠近发散端的锚形钩,优选地,每根加捻支杆的至少一根金属丝在靠近发散端处弯折形成锚形钩。 [0022] portion is provided on the pole near the discharge end of the anchor hooks, preferably, each twisted struts of the at least one wire is bent formed at the end near the diverging anchor-shaped hook.

[0023] 本发明提供的腔静脉滤器中的锚形钩并非通过局部安装或者焊接的方式固定在支杆上,因此,不会在支杆上形成直径增大的凸起部,进而避免因凸起部导致在释放或回收入鞘管的过程中发生卡顿现象。 [0023] vena cava anchor-shaped hook the filter of the present invention is provided not on the pole, therefore, does not form raised portions of increased diameter in the strut by way of a local installation or welding, and thus to avoid projections from the Department of lead Caton phenomenon in the process of releasing or recycling the sheath tube.

[0024] 加捻支杆沿轴向等径延伸,仅在加捻支杆的末端开捻弯折形成锚形钩,不仅连接可靠,没有脱落、移位或断裂的风险,而且具有较高的强度和很好的顺应性,能够顺畅地释放以及回收,不会产生卡顿现象。 [0024] twisted struts axially like path extending only at the end of the twisted struts open twist bent to form an anchor-shaped hook, is connected not only reliable, not worn, displacement, or the risk of breakage, but also having a high strength and good compliance, can be smoothly released and recovered, no Caton phenomenon.

[0025] 本发明中,加捻支杆可以提供沿滤器径向的支撑力,同时根据需要由其中一根或多根金属丝弯折形成锚形钩,优选地,锚形钩的尖端部分朝向各支杆的聚拢端方向弯翘。 [0025] the present invention, the twisted struts may provide support forces along the filter in the radial direction, while necessary, a wherein one or more wires bent to form an anchor-shaped hook, preferably, the anchor-shaped hook tip portion toward gather end direction of each strut to warp. 使得锚形钩尖端部分的切线方向与加捻支杆延伸方向的夹角为0〜180°,增加滤器的稳定性。 Angle so that the anchor-shaped tangential direction of the hook tip portion and the twisted struts extending direction of 0~180 °, increase the stability of the filter.

[0026] 优选地,锚形钩尖端部分的切线方向与加捻支杆延伸方向的夹角为90〜180°,使锚形钩能够刺入血管壁中,防止滤器的脱落。 [0026] Preferably, the tangential direction of the anchor-shaped hook tip portion and the twisted struts angle between the extending direction of 90~180 °, so that the anchor-shaped hook capable of penetrating the vessel wall, to prevent loss of the filter.

[0027] 在释放状态下,锚形钩沿腔静脉滤器的圆周向均匀或非均匀分布,优选地,加捻支杆与锚形钩位于同一平面上,且该平面通过腔静脉滤器的中轴线。 [0027] In the released state, the anchor-shaped hook along the circumference of the vena cava filter to the uniform or non-uniform distribution, preferably twisted struts with an anchor-shaped hook positioned on the same plane, and the plane through the vena cava filter axis .

[0028] 作为优选,每根加捻支杆的至少一部分金属丝在靠近支杆发散端处保持原延伸方向,且长出锚形钩部分作为限定锚形钩刺入血管深度的限位件。 [0028] Preferably, at least a portion of the metal wires of each twisted struts proximate struts diverging end to maintain the original extending direction, and grow anchor-shaped hook portion as defining an anchor-shaped hook piercing the blood vessel depth limiting member.

[0029] 金属丝开捻后分别制成限位件与锚形钩,限位件与锚形钩之间具有一定的相互靠拢或远离的自由度,在释放状态下,限位件抵靠血管内壁,防止锚形钩刺入血管壁的深度过深,在回收时,限位件与锚形钩相互靠拢,具有较好的顺应性,容易将腔静脉滤器从血管壁中拔出并回收。 After [0029] the wire opening twisting are made stopper member and the anchor-shaped hook, they have a mutual approach or freedom away between the stopper member and the anchor hook in the released state, the stopper member against the vessel an inner wall, to prevent the anchor-shaped hook pierce the vessel wall is too deep, in the recovery, the stopper member with the anchor-shaped hook closer to each other, having better compliance, easily vena cava filter withdrawn from the vessel wall and recovered.

[0030] 本发明中所述的原延伸方向均指:金属丝保持加捻状态下的延伸方向,即金属丝按照加捻状态下的扭转趋势继续扭曲。 [0030] The present invention is described in the original extending direction are by: wire holders extending direction in the twisted state, i.e., the wire continues twisted according to reverse in the twisted state.

[0031] 作为一种优选的实施方式,加捻支杆由两根金属丝捻绕而成,一根靠近发散端处弯折形成锚定钩,另一根靠近发散端处保持原延伸方向。 [0031] As a preferred embodiment, the twisted struts around the two wires twisted together, one close to the discharge end of the bent form an anchoring hook, the other near the discharge end of the holding original extending direction.

[0032] 作为另一种优选的实施方式,加捻支杆由三根金属丝捻绕而成,一根靠近发散端处弯折形成锚定钩,另两根靠近发散端处保持原延伸方向。 [0032] As another preferred embodiment, the twisted struts around three wires twisted together, one near the discharge end of the bent form an anchoring hook, the other two near the discharge end of the holding original extending direction.

[0033] 作为优选,加捻支杆在靠近发散端处为与血管壁相贴的抵靠段,加捻支杆的多根金属丝至少在抵靠段加捻。 [0033] Preferably, the twisted struts proximate diverging ends of the vessel wall relative to fit against the segment, twisting the struts of the plurality of wires at least in the abutting segment twisted. 即每根加捻支杆可以由聚拢端至发散端全部加捻,也可以局部加捻。 I.e. each twisted struts may be made to gather end to the discharge end of all the twisting, may be partially twisted. 为了保证加捻的稳定性,每个加捻段由金属丝至少互绕三圈。 In order to ensure the stability of twist, each twisted segment of wire of at least around each three times.

[0034] 为了减少内皮爬覆,加捻支杆所有加捻部位或与血管相贴的抵靠段部位涂覆抗癌细胞增殖药物(例如雷帕霉素或紫杉醇等)涂层;或加捻支杆所有加捻部位或与血管相贴的抵靠段部位包覆有隔离层,所述隔离层为覆膜(例如PTFE)或者润滑涂层。 [0034] In order to reduce endothelial climb cover, twisting the struts all twisted portion or vascular phase affixed abutment segment portion coated cancer cell proliferation drugs (e.g. et rapamycin or paclitaxel) coating; or twisted All struts twisted portion or vascular phase affixed abutment segment portion is coated with a release layer, said release layer is a coating (e.g. PTFE) or a lubricating coating. 加捻支杆间隙也可以填充抗癌细胞增殖药物。 Twisted struts gap may be filled with anti-cancer proliferation agent.

[0035] 为防止腔静脉滤器在体内发生偏斜,优选地,还设有辅助支杆,释放状态下各辅助支杆由聚拢端福射状向外延伸,且分布在各支杆聚拢端的外周。 [0035] To prevent the vena cava filter skewing, preferably in vivo, provides auxiliary struts, each secondary strut in the released state extending from bunching end Fu are radially outwardly, and distributed over the outer periphery of each strut gather ends .

[0036] 当腔静脉滤器发生偏斜时,辅助支杆首先贴靠血管壁,在一定程度上可以防止回收钩倾倒,同时也可以避免加捻支杆贴壁,减小内皮爬覆,延长腔静脉滤器的使用时间。 [0036] When the vena cava filter to deflect the auxiliary strut first against the vessel wall, to a certain extent be prevented recovered hook dumping, but also to avoid twisting the struts adherent, reducing endothelial climb cover, extended cavity cava filter usage time.

[0037] 腔静脉滤器通常设有4〜18根支杆,优选地,所有支杆沿周向间隔分布有多组,相邻两组支杆中,一组为加捻支杆,另一组为不加捻支杆。 [0037] The vena cava filter is typically provided with 4~18 support rods, preferably all struts circumferentially distributed spaced plurality of groups, two adjacent sets of struts, a group of twisted struts, the other group is not twisted rods. 每组支杆的数量为1根或多根。 The number of each strut is one or more. 各组支杆的数量可以相同,也可以不同。 Number of groups strut may be the same or different.

[0038] 为了减少各支杆的间隙尺寸,捕获更小的血栓,优选地,各加捻支杆在靠近聚拢端的部位,各金属丝开捻互绕编织成网格结构。 [0038] In order to reduce the gap dimension of each strut, and capture smaller thrombi, preferably, each of the twisted struts near the gathering end portions, each of the wires apart twisted around each woven into a mesh structure. 所述网格结构能够增加支杆之间的支撑力。 The mesh structure capable of increasing the supporting force between the struts.

[0039] 作为优选,加捻支杆的加捻方式为多根金属丝互绕,捻度由聚拢端至发散端均匀分布或非均匀分布。 [0039] Preferably, the twisted struts twisting manner to a plurality of wires around each other, twisting the gathered end to the discharge end of uniform or non-uniform distribution.

[0040] 每根加捻支杆的弹性模量可以通过加捻的致密程度来调节,优选地,每根加捻支杆上,聚拢端的捻度小于发散端的捻度。 [0040] The elastic modulus of each twisted struts can be adjusted by the degree of densification twist, preferably, on each twisted struts gathered end twist is smaller than the discharge end of the twist.

[0041] 聚拢端的捻度小,具有更好的柔顺性,发散端的捻度大,具有更好的强度以提供径向支撑力,且能够保证锚形钩与限位件的相对位置关系。 [0041] gather end twist is small, better flexibility, the discharge end of the large twist, having better strength to provide radial support force, and can ensure the relative positional relationship between the anchor-shaped hook and the stopper member.

[0042] 本发明中的加捻方式不限于多根金属丝互绕,也可以采用其他形式,例如,加捻支杆的加捻方式为:以若干根金属丝为芯丝,其余金属丝螺旋缠绕在芯丝外周,缠绕节距由聚拢端至发散端均匀分布或非均匀分布。 [0042] twisted embodiment of the present invention is not limited to the plurality of wires around each other, may be employed in other forms, e.g., twisting the struts twisting way: to a plurality of wires as the core wire, the remaining wire coil wound around the core wire an outer periphery, the winding pitch end to the discharge end of uniform or non-uniform distribution of bunching.

[0043] 为了调节加捻支杆的弹性模量以满足不同部位的强度和顺应性的要求,优选地, 每根加捻支杆上,聚拢端的缠绕节距大于发散端的缠绕节距。 [0043] In order to adjust the elastic modulus of the twisted struts to meet the strength of different parts and compliance requirements, preferably, on each twisted struts gathered end winding pitch greater than the discharge end of the winding pitch.

[0044] 作为优选,芯丝靠近发散端处保持原延伸方向,绕在芯丝外周的至少一根金属丝在发散端处弯折形成锚形钩。 [0044] Advantageously, core yarn near the discharge end of the holding original extension direction around the outer periphery of the core wire of the at least one wire at the diverging end is bent to form an anchor-shaped hook.

[0045] 本发明提供的腔静脉滤器相比现有技术具有以下优点: [0045] The vena cava filter according to the present invention provides the following advantages over the prior art:

[0046] (1)加捻支杆等径延伸,从鞘管中释放以及回收入鞘管的过程顺畅,不会产生卡顿现象; [0046] (1) twisted struts like path extending released from the sheath as well as the recovery process the sheath tube is smooth, no Caton phenomenon;

[0047] (2)锚形钩连接可靠,没有脱落、移位或断裂的风险; [0047] (2) anchor-shaped hook reliable connection, no shedding, displacement, or the risk of breakage;

[0048] (3)强度以及顺应性可以通过调整金属丝的数量,金属丝的丝径、金属丝的捻绕方式以及金属丝的捻绕部位来调整,能够充分满足各部位的不同需求; [0048] (3) strength, and compliance by adjusting the number of wire, wire diameter wire, twisting manner wire and wire twisting portion is adjusted, can fully meet the different needs of each site;

[0049] (4)能够兼顾径向支撑力和腔静脉滤器的锚定性能,控制锚形钩刺入血管壁的深度,锚形钩与限位件之间具有相对移动的自由度,容易从血管壁中拔出并回收入鞘管。 [0049] (4) capable of both radial force and anchoring performance vena cava filter, having a relative freedom of movement between the control anchor-shaped hook pierce the vessel wall depth, anchor-shaped hook and the stopper member, readily available from vascular wall removed and recovered into the sheath tube.

附图说明 BRIEF DESCRIPTION

[0050] 图Ia为本发明实施例1的腔静脉滤器的示意图; [0050] The schematic embodiment vena cava filter in Example 1. FIG. Ia of the present invention;

[0051] 图Ib为本发明实施例1的腔静脉滤器的示意图(由套筒一端俯视); [0051] FIG Ib vena cava filter of Example 1 of the present invention, a schematic view (top view of the sleeve end);

[0052] 图Ic为本发明实施例1加捻支杆发散端的局部示意图; [0052] FIG. Ic is a partially schematic view of a twisted struts diverging ends of the embodiment of the invention;

[0053] 图IcU图le、图If、图Ig为本发明实施例1中加捻支杆不同加捻方式的示意图; A schematic diagram of a different twisted embodiment 1 of twisted struts Embodiment [0053] FIG IcU FIG le, FIG If, FIG Ig of the present invention;

[0054] 图2a为本发明实施例2的腔静脉滤器的示意图; [0054] The schematic embodiment vena cava filter of Example 2 Figure 2a of the present invention;

[0055] 图2b为图2a中的A部放大图; [0055] FIG. 2b an enlarged view of A portion in FIG. 2A;

[0056] 图3a为本发明实施例3的腔静脉滤器的示意图; [0056] FIG. 3a schematic vena cava filter according to the third embodiment of the present invention;

[0057] 图3b为图3a中的B部放大图; [0057] FIG. 3b is a B portion in FIG. 3a is an enlarged view;

[0058] 图4a为本发明实施例4的腔静脉滤器的示意图; [0058] FIG 4a is a schematic diagram vena cava filter 4 embodiment of the present invention;

[0059] 图4b为图4a中的C部放大图; [0059] Figure 4b is a C portion in FIG. 4a enlarged view;

[0060] 图5a为本发明实施例5的腔静脉滤器的示意图; [0060] FIG. 5a is a schematic diagram vena cava filter 5 embodiment of the invention;

[0061] 图5b为本发明实施例5的腔静脉滤器的示意图(由套筒一端俯视); A schematic view of the vena cava filter of Example 5 of [0061] FIG. 5b present invention (a top view of the sleeve end);

[0062] 图5c为图5a中的D部放大图; [0062] FIG. 5c is a D portion in FIG. 5a in an enlarged view;

[0063] 图5d为图5a中的E部放大图; [0063] FIG 5d is a part E in FIG. 5a in an enlarged view;

[0064] 图6a为本发明实施例6的腔静脉滤器的示意图; [0064] Figure 6a is a schematic diagram vena cava filter 6 the embodiment of the present invention;

[0065] 图6b为本发明实施例6的腔静脉滤器的示意图(由套筒一端俯视); A schematic view of the vena cava filter of Example 6 of [0065] FIG. 6b of the present invention (a top view of the sleeve end);

[0066] 图7a为本发明实施例7的腔静脉滤器的示意图; [0066] Figure 7a schematic vena cava filter according to a seventh embodiment of the present invention;

[0067] 图7b为图7a中的F部放大图; [0067] FIG. 7b is F portion of FIG. 7a an enlarged view;

[0068] 图7c为图7a中的G部放大图; [0068] Figure 7c is a G portion of FIG. 7a an enlarged view;

[0069] 图7d为本发明实施例7的腔静脉滤器的示意图(由套筒一端俯视)。 [0069] FIG. 7d schematic vena cava filter of Example 7 (top by a sleeve end) embodiment of the present invention.

具体实施方式 Detailed ways

[0070] 下面结合附图,对本发明腔静脉滤器做详细描述。 [0070] below with reference to the accompanying drawings, of vena cava filters according to the present invention, a detailed description.

[0071] 实施例1 [0071] Example 1

[0072] 如图la、图Ib所示,本实施例的腔静脉滤器1000包括多根支杆,多根支杆的一端聚拢束缚于2.Omm套筒1100内,并通过氩弧焊焊接固定形成聚拢端1210,多根支杆的另一端在释放状态下辐射发散形成发散端1220。 [0072] FIG La, Figure Ib, vena cava filters according to the present embodiment 1000 comprising a plurality of struts, a plurality of end strut bunching bound within 2.Omm sleeve 1100, and is fixed by TIG welding forming gather end 1210, the other end of the plurality of struts in the released state radiation diverging discharge end 1220 are formed.

[0073] 在释放状态下,多根支杆大致分布在同一锥形的锥面上,各支杆在发散端1220处围成的圆周直径最大。 [0073] In the released state, the plurality of struts is substantially distributed on the tapered surface of the same taper, the maximum each strut surrounded at the discharge end 1220 circular diameter. 各支杆的长度为30〜70mm,发散端1220围成的圆周最大直径约为20 〜80mm〇 The length of each strut is 30~70mm, discharge end 1220 surrounded by the circumferential maximum diameter of about 20 ~80mm〇

[0074] 支杆数量通常采用4〜18根,本实施例中支杆数量为6根,其中4根支杆为加捻支杆1230,2根支杆为非加捻支杆1240,在释放状态下,2根非加捻支杆1240与腔静脉滤器1000的中轴线确定一平面,4根加捻支杆1230对称布置在平面两侧,且6根支杆沿圆周方向等间距分布,加捻支杆1230和非加捻支杆1240在圆周方向上间隔分布。 [0074] The number of struts usually 4~18 root, in this embodiment the number of struts to 6, wherein four struts is twisted struts 1230,2 support rods non-twisted struts 1240, release state, the two non-twisted struts 1240 with the vena cava filter 1000 in an axis defining a plane, four twisted struts 1230 are arranged symmetrically at both sides of the plane, and the distance distribution six struts in the circumferential direction, plus twisted struts 1230 and a non-twisted struts 1240 are spaced in the circumferential direction. 相邻两根加捻支杆1230为一组,相邻两组加捻支杆1230之间为一根非加捻支杆1240,两根非加捻支杆1240之间为一组加捻支杆1230。 Adjacent two twisted struts 1230 is a group, as a non-twisted struts 1240, as a set of twisted branched between two non-twisted struts 1240 between the two sets of twisted struts 1230 adjacent lever 1230.

[0075] 本实施例中,加捻支杆1230从聚拢端1210至发散端1220均加捻,加捻支杆1230由两根金属丝捻绕而成,两根金属丝的丝径相同。 [0075] In this embodiment, twisted struts 1230 from the gathered end of 1210 to the discharge end 1220 are twisted, the twist rods 1230 about the two wires are twisted to the same wire diameter of two wires. 金属丝可以采用不锈钢、镍钛合金、钴铬合金或钛合金材质中的一种或多种,金属丝的丝径范围为0.05〜0.5mm。 The wire can be stainless steel, wire diameter range of nickel-titanium alloy, cobalt chromium alloy or titanium alloy material of one or more of the wire is 0.05~0.5mm. 同一根加捻支杆1230 可以选择同种或不同种的金属丝捻绕而成,以满足加捻支杆1230的强度以及柔顺性的要求。 With a twisted struts 1230 you can select the same or a wire twisting different kinds wound together, in order to meet the strength twisted struts 1230 and the compliance requirements. 金属丝加捻后通过模具热定型制成加捻支杆1230。 Shape formed twisted struts 1230 after the metal filament twist by mold hot.

[0076] 如图Ic所示,每根加捻支杆1230的一根金属丝在发散端1220处弯折形成锚形钩1251,锚形钩1251的尖端部分朝向各支杆的聚拢端1210方向弯翘,另一根在靠近发散端1220处保持原延伸方向。 [0076] As shown in FIG. Ic, each twisted struts a wire 1230 is bent at the discharge end 1220 form an anchor-shaped hook 1251, the tip portion of the anchor-shaped hook 1251 toward bunching end of each strut 1210 direction warped, the other to maintain the original extending direction near the discharge end 1220.

[0077] 在体内释放后,锚形钩1251刺入血管内壁2000,将腔静脉滤器1000锚固在血管中, 防止腔静脉滤器1000顺着血液冲刷的方向发生移位。 [0077] After releasing the body, an anchor-shaped hook 1251 piercing the vessel wall 2000, the vena cava filter 1000 is anchored in the vessel, preventing the vena cava filter 1000 along the blood flushing direction displaced. 保持原延伸方向的金属丝在加捻支杆1230的长度方向上超出锚形钩1251部分作为限位件1252,限位件1252用于限定锚形钩1251 刺入血管的深度。 Maintain the original extending direction of the wire beyond the anchor-shaped hook 1251 portion in the longitudinal direction of the twisted struts 1230 as 1252 depth for defining an anchor-shaped hook 1251 pierce the vessel stopper 1252, the stopper member.

[0078] 如图Ic所示,在加捻支杆1230发散端1220锚形钩1251与限位件1252的开捻分离处,锚形钩1251的切线方向与加捻支杆1230延伸方向的夹角α为〇〜90°,即在锚形钩1251与限位件1252开捻分离处,锚形钩1251与限位件1252所在的金属丝的夹角为锐角,锚形钩1251末端的切线方向与加捻支杆1230延伸方向的夹角β为90〜180°,即锚形钩1251末端与限位件1252末端的指向相互背离。 [0078] As shown in FIG Ic, the twisted struts 1230 discharge end 1220 anchor opening twisting separation of the shaped hooks 1251 and the stopper member 1252 sandwiched tangential direction of the anchor-shaped hook 1251 and twisted struts 1230 extending direction angle α is 〇~90 °, i.e., an anchor-shaped hook 1251 and the stopper 1252 opened twisting separation, the angle of the wire anchor-shaped hook 1251 and the stopper 1252 where the tangent an acute angle, anchor-shaped hook 1251 terminus angle β direction and twisted struts 1230 extending direction of 90~180 °, point 1252 terminal, i.e. anchor-shaped hook 1251 tip and the stopper member facing away from each other.

[0079] 对每根加捻支杆1230而言,锚形钩1251与所在的加捻支杆1230处于同一平面内, 四根加捻支杆1230及其锚形钩1251确定的平面具有一交线,该交线为腔静脉滤器1000的中轴线。 [0079] for each of the twisted struts 1230, anchor-shaped hooks 1251 and twisted struts where 1230 is in the same plane, four twisted struts 1230 and planar anchor-shaped hook 1251 is determined to have a cross- line, the line of intersection is a vena cava filter axis 1000.

[0080] 对于同一腔静脉滤器1000的不同加捻支杆1230以及同一加捻支杆1230均可以通过加捻的疏密程度来满足不同位置处的强度和柔顺性的要求。 [0080] For the same vena cava filter different twisted struts 1000, 1230 and the same twisted struts 1230 can be used to meet the strength and flexibility requirements at different locations through-density twist. 如图Ia所示,同一加捻支杆1230由多根金属丝互绕而成,捻度由聚拢端1210至发散端1220均匀分布。 As shown in FIG Ia, the same twisted strut 1230 by a plurality of wires around each other together, twist the gathered end 1210 to the discharge end of 1220 evenly distributed.

[0081] 如图Id所示,同一加捻支杆1230由多根金属丝互绕而成,捻度由聚拢端1210至发散端1220逐渐变小,即单位长度上两根金属丝互绕的圈数由聚拢端1210至发散端1220逐渐变少。 [0081] FIG. Id, the same twisted strut 1230 by a plurality of wires around each other together, twist the gathered end 1210 to a discharge end 1220 becomes gradually smaller, i.e., two wires per unit length around each circle the number of the gathered end 1210 to the discharge end gradually become less 1220. 如图Ie所示,同一加捻支杆1230由多根金属丝互绕而成,捻度由聚拢端1210至发散端1220逐渐变大。 FIG Ie, the same twisted strut 1230 by a plurality of wires around each other together, twist the gathered end 1210 to a discharge end 1220 gradually increases.

[0082] 加捻支杆1230的加捻方式除了采用金属丝互绕的方式,也可以采用其他方式,如图If所示,以一根金属丝为不发生扭曲的芯丝,另一根金属丝螺旋缠绕在芯丝外周,缠绕节距由聚拢端1210至发散端1220均匀分布,芯丝的丝径可以大于、小于或者等于芯丝外缠绕的金属丝丝径。 Twisting manner [0082] twisted struts 1230 except that a wire around each other ways, may be used in other ways, as shown in FIG If shown, to a metal wire as the core wire is not distorted, and the other metal wire spiral wound on the outer periphery of the core wire, the winding pitch of bunching end 1210 to the discharge end of 1220 evenly distributed, the wire diameter of the core wire may be greater than, less than or equal to a metal trace diameter of the outer core wire wound. 芯丝靠近发散端1220处保持原延伸方向作为限位件1252,绕在芯丝外周的金属丝在发散端1220处弯折形成锚形钩1251。 Core wire near the discharge end of 1220 to maintain the original extending direction as the stopper member 1252 around the outer periphery of the core wire of the wire is bent to form an anchor-shaped hook 1251 at the discharge end 1220.

[0083] 采用金属丝螺旋缠绕的方式进行加捻,缠绕节距由聚拢端1210至发散端1220可以非均匀分布,如图Ig所示,每根加捻支杆1230上,聚拢端1210的缠绕节距大于发散端1220的缠绕节距。 [0083] by way of a wire wound helically twisting, winding pitch 1210 to the discharge end 1220 may be non-uniform distribution, as shown in FIG an Ig, on each twisted struts 1230 by the gathered end, gather the winding end 1210 pitch greater than the winding pitch 1220 of the discharge end. 绕在芯丝外周的金属丝在发散端1220处弯折形成锚形钩1251,芯丝背离锚形钩1251的方向略微弯折形成限位件1252。 Direction around the outer periphery of the core wire of the wire is bent to form an anchor-shaped hook 1251 at the discharge end of 1220, the core wire away from the anchor-shaped hook 1251 is slightly bent stopper member 1252 is formed.

[0084] 用作可回收腔静脉滤器1000时,在套筒1100背离支杆的一端固定回收钩。 When [0084] as retrievable inferior vena cava filter 1000, the end of the sleeve 1100 away from the strut with fixed hooks.

[0085] 本实施例提供的腔静脉滤器1000的输送可以现有技术,例如,将腔静脉滤器1000 压缩至导管后,经静脉输送至肾动脉以下,回撤鞘管,腔静脉滤器1000从导管内释放,并自膨展开,腔静脉滤器1000末端的锚形钩1251首先接触血管内壁2000,随着腔静脉滤器1000 的释放,直至支杆全部展开,在血管内形成过滤网,实现拦截血栓的作用,同时锚定钩处的径向支撑力达到最大,刺入血管内壁2000,实现腔静脉滤器1000在体内的锚定。 After the [0085] present delivery 1000 may be prior art vena cava filter according to an embodiment, e.g., the vena cava filter 1000 is compressed to a catheter, intravenous delivery to the renal arteries below retracement of the sheath, vena cava filter 1000 from the catheter the release, and the self-expanding deployment, anchor-shaped hook 12511000 terminus vena cava filter first contacts the vessel wall 2000, with the release of the vena cava filter 1000 until struts fully expanded, formed filter in a blood vessel, to achieve intercept thrombus effect, while the anchoring radial force hook at the maximum, the puncturing blood vessel wall 2000, to achieve vena cava filter 1000 in the body of the anchor.

[0086] 实施例2 [0086] Example 2

[0087] 如图2a、图2b所示,本实施例与实施例1的区别在于,加捻支杆2230的丝径不同。 [0087] FIG. 2a, 2b, the present embodiment and the embodiment differs from 1 in that the different twisted struts 2230 of the wire diameter. 加捻支杆2230由两根丝径不同的金属丝加捻而成,其中丝径较粗的金属丝2261不发生扭曲, 丝径较细的金属丝2262缠绕在丝径较粗的金属丝2261上,且聚拢端2210的缠绕节距小于发散端2220的缠绕节距。 Twisted struts 2230 of two wires of different diameter wire rod twisted together, wherein the wire diameter thick wire 2261 is not distorted, the wire diameter of fine wire 2262 wound around the wire diameter thick wire 2261 upper and gather end winding pitch 2210 is less than the diverging winding pitch end 2220.

[0088] 如图2b,在加捻支杆2230的发散端2220,丝径较粗的金属丝2261保持原延伸方向, 丝径较细的金属丝2262的末端朝向聚拢端2210弯翘形成锚形钩2251。 [0088] FIG. 2B, at the discharge end twisted struts 2230 2220, wire diameter thick wire 2261 to maintain the original direction of extension forming an anchor-shaped filament diameter fine wire tip 2262 toward bunching end 2210 warped hook 2251.

[0089] 本实施例的释放过程同实施例1。 [0089] This release process embodiment is the same as in Example 1.

[0090] 实施例3 [0090] Example 3

[0091] 如图3a、图3b所示,本实施例与实施例1的区别在于,加捻支杆由三根金属丝互绕而成,三根金属丝的丝径相同,捻度由聚拢端3210至发散端3220逐渐变小。 [0091] As shown in FIG 3a, FIG 3b, the present embodiment and the embodiment differs from 1 in that the twisted struts of three wires around each other from the same wire diameter three metal filaments, twist the gathered end 3210 to diverging end 3220 becomes gradually smaller. 加捻支杆的一根金属丝在靠近发散端3220处弯折形成锚定钩3251,另两根金属丝靠近发散端3220处并排保持原延伸方向。 Twisted struts one wire at near the discharge end 3220 is bent to form an anchoring hook 3251, the other two wires near the discharge end of the 3220 side by side to maintain the original extending direction.

[0092] 本实施例的释放过程同实施例1。 [0092] This release process embodiment is the same as in Example 1.

[0093] 实施例4 [0093] Example 4

[0094] 本实施例与实施例1的区别在于,每根加捻支杆4230仅在靠近发散端4220的抵靠段局部加捻。 This embodiment differs from Example 1 of Embodiment [0094] present in that each twisted struts 4230 only near the diverging abutting end 4220 by segment partially twisted. 如图4a、图4b所示,每根加捻支杆4230由两根金属丝组成,在靠近发散端4220 处的抵靠段为加捻段,其余为非加捻段,在非加捻段,两根金属丝并行设置且相互之间不固定,加捻段靠近发散端4220处且与血管内壁相贴。 FIG 4a, FIG. 4b, each twisted struts 4230 consisting of two metal filaments in contact near the discharge end 4220 of the bearing portion is twisted section, the remaining non-twisting section, the non-twisted sections , two wires disposed in parallel and with each other is not fixed, twisting section near the discharge end of the 4220 and the blood vessel inner wall affixed.

[0095] 在加捻段中,为了保证金属丝不开捻,互绕圈数至少为3圈,金属丝的末端利用模具热定型,其中一根金属丝沿原延伸方向延伸,另一根金属丝朝向聚拢端4210弯翘形成锚形钩4251。 [0095] In the twisted section in order to ensure the wire does not open twist, mutual turns number is at least 3 turns, the end of the metal wire using a mold heat set, wherein a wire extending along the original extending direction, the other metal 4210 warping yarn towards bunching end forming anchor-shaped hook 4251.

[0096] 本实施例的释放过程同实施例1。 [0096] This release process embodiment is the same as in Example 1.

[0097] 实施例5 [0097] Example 5

[0098] 为了防止腔静脉滤器发生偏斜,减少内皮爬覆,在腔静脉滤器生增设辅助支杆5270,如图5a、图5b所示,多根支杆以及辅助支杆5270的一端聚拢束缚于2.5mm套筒5100内, 并通过氩弧焊焊接固定形成聚拢端5210,多根支杆以及辅助支杆5270的另一端在释放状态下辐射发散形成发散端。 [0098] In order to prevent the vena cava filter skewing, reducing endothelial climb cover, the vena cava filter raw additional auxiliary strut 5270, as shown in FIG. 5a, 5b, one end of the plurality of struts and the secondary struts 5270 bunching Bound within 2.5mm sleeve 5100 and fixed to form a gathered end by TIG welding 5210, the other end of the plurality of struts and the secondary struts 5270 in the released state radiation diverging form diverging end.

[0099] 支杆的数量为4〜18根,在释放状态下,各支杆大致位于同一锥面上,各支杆的发散端5220绕成的圆直径Dl为最大。 [0099] The number of struts is 4~18 root, in the released state, each strut is located substantially on the same tapered surface, the discharge end 5220 of each strut wound circle diameter Dl of the maximum. 各支杆均为加捻支杆5230,在释放状态下,绕圆周方向均勾分布。 Each strut are twisted struts 5230, in the released state, around the circumferential direction of both the hook profile.

[0100] 各加捻支杆5230全部或部分由至少两根金属丝加捻而成,金属丝可以采用不锈钢、镍钛合金、钴络合金或钛合金中的一种或多种,金属丝的丝径范围为0.05〜0.5mm。 [0100] Each twisted struts 5230 in whole or in part by at least two metal filament twisted together, the wire can be stainless steel, one or more of wires of nickel titanium alloy, cobalt Cr alloy or titanium alloy the wire diameter range 0.05~0.5mm. 同一根加捻支杆5230可以选择同种或不同种的金属丝捻绕而成,以满足加捻支杆5230的强度以及柔顺性的要求。 With a twisted struts 5230 you can select the same or a wire twisting different kinds wound together, in order to meet the strength twisted struts 5230 and the compliance requirements. 金属丝加捻后通过模具热定型制成加捻支杆5230。 After the metallic filament twist setting made twisted struts 5230 by mold hot.

[0101] 本实施例中,加捻支杆5230为6根,各加捻支杆5230均由两根金属丝捻绕而成,每根金属丝为丝径〇. 45mm的镍钛丝,靠近加捻支杆5230发散端5220处的金属丝开捻。 [0101] In this embodiment, twisted struts 5230 is six, each of the twisted struts 5230 two wires twisting by made, each wire of wire diameter square. 45mm nickel titanium wire, close wire twisted struts 5230 discharge end 5220 of the open-twisted.

[0102] 辅助支杆5270为6根,辅助支杆5270采用直径为0.40mm的镍钛丝定型而成,辅助支杆5270间隔分布在各支杆之间,即每两根支杆之间设置一根辅助支杆5270,每两根辅助支杆5270之间设置一根支杆。 [0102] Auxiliary strut 5270 is 6, the auxiliary yoke 5270 with a diameter NiTi wire was 0.40mm of stereotypes, the auxiliary struts 5270 are spaced between each strut, i.e. disposed between each two struts an auxiliary strut 5270 is provided a strut between each of the two auxiliary struts 5270.

[0103] 在释放状态下,各辅助支杆5270大致处于同一半球面上,各辅助支杆5270分布在各加捻支杆5230聚拢端5210的外周。 [0103] In the released state, each of the auxiliary strut 5270 is substantially in the same hemispherical surface, each of the auxiliary strut 5270 distributed about the periphery of each of the twisted struts 5230 gathered end of 5210. 辅助支杆5270的发散端围成的圆直径为D2,且D2不大于加捻支杆5230发散端5220围成的圆直径Dl。 Diverging end of the auxiliary strut 5270 enclosed circle diameter D2, and D2 is not greater than twisted struts 52305220 enclosed circle diameter Dl discharge end.

[0104] 如图5b所示,各加捻支杆5230的长度均大于辅助支杆5270的长度,各加捻支杆5230中长度较长的2根为一组,该组加捻支杆5230的发散端5220如图5c所示,金属丝5261和金属丝5262的末端指向均背离加捻支杆5230的延伸方向,在金属丝开捻处,金属丝5261的切线方向与加捻支杆5230延伸方向的夹角αΐ为〇〜90°,金属丝5262的切线方向与加捻支杆5230延伸方向的夹角€(2为0〜90°,金属丝5261的末端切线方向与加捻支杆5230延伸方向的夹角βΐ为〇〜90°,金属丝5262的末端切线方向与加捻支杆5230延伸方向的夹角02为〇〜 90。。 [0104] Figure 5b, the twist length of each strut 5230 is greater than the average length of the auxiliary struts 5270, 5230 in each of the struts twisting two longer length as a set, the set of twisted struts 5230 diverging end 5220 terminal shown in FIG. 5C, the wire 5261 and a wire 5262 points are away from the extending direction of the twisted struts 5230, open twist at the wire, the tangential direction of the wire 5261 and the twisted struts 5230 It is the angle between the extending direction αΐ 〇~90 °, the angle between the tangential direction of the wire € 5262 and 5230 twisted struts extending direction (2 0~90 °, the wire end twisted with the tangential direction of the struts 5261 angle βΐ 5230 extending direction of 〇~90 °, the wire tip tangential direction twisted struts 5230 extending in a direction 5262 angle 02 〇~ 90 ..

[0105] 各加捻支杆5230中长度较短的4根为一组,该组加捻支杆5230的发散端5220如图5d所示,其中一根金属丝5263朝向腔静脉滤器的聚拢端5210弯翘形成锚形钩5251,另外一根金属丝5264沿原延伸方向延伸。 [0105] Each twisted struts 5230 in a shorter length of 4 as a set, the set of twisted struts diverging end 5220 5230 As shown in FIG 5D, in which a wire 5263 towards the end of the vena cava filter bunching 5210 warping anchor-shaped hook 5251 is formed, an additional wire 5264 extends in the extending direction of the original. 在金属丝开捻处,金属丝5263切线方向与加捻支杆5230 延伸方向的夹角αΐ为0〜90°,金属丝5264切线方向与加捻支杆5230延伸方向的夹角α2为0 〜90°,金属丝5263末端切线方向与加捻支杆5230延伸方向的夹角β为90〜180°。 Open the wire twisting, the wire 5263 αΐ angle tangential direction twisted struts 5230 extending direction of 0~90 °, the angle between the wire struts 5264 5230 tangential direction of twisting extending in the direction α2 is 0 ~ 90 °, an angle β wire terminal 5263 and the tangential direction twisted struts 5230 extending direction of 90~180 °.

[0106] 腔静脉滤器在血管内存在顺着血流方向移位的可能,当患者站立时,也有逆着血流方向运动的可能,如图5d所示,金属丝5263的末端插入血管壁后,能够防止滤器沿顺着血流方向运动;如图5c所示,金属丝5262的末端插入血管壁后,能够阻止滤器沿逆着血流方向运动。 After [0106] vena cava filter in a blood vessel in the memory may be shifted along the direction of blood flow, when the patient is standing, it is also possible movement against the direction of blood flow, the end shown in FIG. 5D, a wire 5263 is inserted into the blood vessel wall , in the filter can be prevented from moving along the direction of blood flow; the terminal shown in FIG. 5C, the wire 5262 is inserted into the blood vessel wall, the filter can be prevented from moving in the direction counter to the blood flow. 采用两种不同方向弯折的金属丝,保证腔静脉滤器在血管内支撑的稳定性。 Metal wire bent in two different directions, to ensure the stability of the vena cava filters supported within the vessel.

[0107] 用作可回收腔静脉滤器时,在套筒5100背离支杆的一端固定回收钩5300。 [0107] When used as a retrievable inferior vena cava filter, the strut facing away from the end of the sleeve 5100 with fixed hooks 5300.

[0108] 本实施例的释放过程同实施例1,当腔静脉滤器出现偏斜时,辅助支杆5270首先贴覆血管内壁2000,在一定程度上可以防止回收钩倾倒,同时也可以避免加捻支杆5230贴覆血管内壁2000,减小内皮爬覆,延长滤器的使用时间。 [0108] Examples of the release process of the present embodiment in Example 1, when the deflection occurs vena cava filters, first auxiliary strut 5270 is pasted vessel wall 2000, to some extent possible to prevent the hook dumping recovered, but also to avoid twisting struts 5230 2000 overlying the blood vessel wall, reducing endothelial climb cover, extended filter life.

[0109] 实施例6 [0109] Example 6

[0110] 为了减小支杆间的间隙尺寸,捕获更小的血栓,如图6a、6b所示,各加捻支杆在靠近聚拢端6210的部位,各金属丝6260开捻互绕编织成网格结构。 [0110] In order to reduce the size of the gap between the struts, thrombi captured less, FIG. 6a, 6b, each of the twisted struts gather near the end portions 6210, 6260 of each wire twisted around each opening woven grid structure. 金属丝的丝径以及材质选择同实施例1,本实施例中金属丝为镍钛丝。 Wire diameter and a wire material selection as in Example 1, the present embodiment the wire is a nickel titanium wire embodiment.

[0Ί1Ί] 本实施例中,支杆由16根0.35mm金属丝6260编织而成,金属丝6260的一端聚拢束缚于2.Omm套筒6100内,并通过氩弧焊焊接固定,金属丝6260的另一端辐射状扩散,沿金属丝6260的延伸方向划分为第一加捻段、非加捻段和第二加捻段,在第一加捻段中,相邻两根金属丝6260划分为一组,同组的两根金属丝6260相互捻绕;在非加捻段,各组金属丝6260开捻后各自独立;在第二加捻段,同组的各金属丝6260分别跟相邻的不同组的其中一根金属丝6260相互捻绕,第一加捻段和非加捻段的各金属丝6260形成菱形的网格结构。 [0Ί1Ί] In this embodiment, the struts 16 by a braided wire 6260 made of 0.35mm, one end of the wire is gathered to be bound by the 6260 2.Omm sleeve 6100, and secured by TIG welding, wire 6260 the other end of radial diffusion, twisted into a first segment, a second segment and a non-twist twisting section 6260 extending direction of the wire, the twisting in the first section, two adjacent wires is divided into a 6260 group, the same group of two wires each twisting 6260; a non-twisting section, each group of twisted metal wires each independently after opening 6260; twisting in a second section, the wires 6260 are respectively the same group with the adjacent wherein a different set of wires 6260 from each other about a twist, a first twisted wire segments and each segment 6260 is formed of non-twisted rhombic mesh structure. 菱形的网格结构能够增加支杆的支撑力,也能够减小支杆的间隙,增加血栓的捕获效率。 Rhombic mesh structure capable of increasing the supporting force of the strut, the strut can be reduced gaps, thrombus capture efficiency increases.

[0112] 具体来说,16根金属丝分别编号并分组,沿周向依次为(1,2)、(3,4)、(5,6)、(7, 8)、(9,10)、(11,12)、(13,14)、(15,16)、在第一加捻段,同组金属丝加捻;在非加捻段,各组金属丝各自独立;在第二加捻段,两相邻分组中,各自抽取任意一根金属丝进行加捻,比如: 依据如下分组进行加捻,(16,1)、(2,3)、(4,5)、(6,7)、(8,9)、(10,11)、(12,13)、(14,15)。 [0112] Specifically, metal wires 16 are numbered and grouped in sequence in the circumferential direction (1,2), (3,4), (5,6), (7,8), (9,10) , (11,12), (13,14), (15,16), twisting in a first section, the same set of metal filament twist; in the non-twisting section, the wire groups independently; adding a second twist sections, two adjacent packets, each extract any twisting a wire, such as: twisting based on the following packet, (16,1), (2,3), (4,5), (6, 7), (8,9), (10,11), (12,13), (14,15).

[0113] 用作可回收腔静脉滤器时,在套筒6100背离支杆的一端固定回收钩6300。 [0113] When used as a retrievable inferior vena cava filter, the strut facing away from the end of the sleeve 6100 with fixed hooks 6300. 本实施例的释放过程同实施例1。 Release process according to the present embodiment is the same as in Example 1.

[0114] 实施例7 [0114] Example 7

[0115] 本实施例与实施例5的区别在于,各加捻支杆7230上覆有PTFE薄膜7280。 The difference between Example 5 [0115] Example embodiment of the present embodiment that the PTFE film coated on each of the twisted struts 7280 7230.

[0116] 如图7a、7d所示,本实施例中加捻支杆7230为4根,辅助支杆7270为8根,在释放状态下,加捻支杆7230以及辅助支杆7270分别绕周向均匀分布,每两根加捻支杆7230之间设有2根辅助支杆7270。 [0116] FIG. 7a, 7d, the present embodiment is twisted struts 7230 Embodiment 4, the auxiliary strut 7270 is 8, in the released state, twisting the struts 7230 and 7270, respectively, around the circumferential auxiliary strut uniformly distributed, has two secondary struts twisted 7270 between two struts 7230 each.

[0117] 如图7b所示,每根加捻支杆7230由2根金属丝相互捻绕而成,如图7a、7c所示,各加捻支杆7230上除了发散端处的锚形钩7251和限位件7252外,其余部位覆有PTFE薄膜7280, PTFE薄膜7280的厚度为0.05mm JTFE薄膜7280可以阻止内皮爬覆,延长腔静脉滤器的使用寿命,易于腔静脉滤器的回收。 [0117] 7b, each strut 7230 by two twisted wires each formed by twisting, as shown in FIG 7a, as shown, strut 7230 except that each twisted anchor-shaped hook at the end of the diverging 7c 7251 and the stopper member 7252, the remaining portion covered with PTFE film 7280, the film thickness of the PTFE film 7280 is 0.05mm JTFE cover 7280 may prevent endothelial climb, extend the life of the vena cava filter, easy recycling of vena cava filters.

[0118] 本实施例的释放过程同实施例1。 Release process [0118] according to the present embodiment is the same as in Example 1.

Claims (17)

1. 一种腔静脉滤器,包括多根支杆,各支杆的一端相互聚拢,另一端在释放状态下辐射发散,其特征在于,至少一部分支杆为由多根金属丝捻绕而成的加捻支杆。 A vena cava filter, comprising a plurality of struts, each strut of each gather one end, the other end of the radiation divergence in the released state, characterized in that at least a portion of the struts by the plurality of wires obtained by twisting twisting strut.
2. 如权利要求1所述的腔静脉滤器,其特征在于,加捻支杆由两根以上的金属丝捻绕而成。 2. Vena Cava Filter according to claim 1, characterized in that the struts twisted about by more than two wires twisted together.
3. 如权利要求1所述的腔静脉滤器,其特征在于,同一加捻支杆的各金属丝等径或不完全等径。 Vena cava filter according to claim 1, wherein the wires of the same twisted struts Equal Equal or incomplete.
4. 如权利要求1所述的腔静脉滤器,其特征在于,每根加捻支杆的至少一根金属丝在靠近发散端处弯折形成锚形钩。 4. A Vena Cava Filter according to claim 1, wherein each strut at least one twisted wire bent to form hook-shaped end anchored near the divergence.
5. 如权利要求4所述的腔静脉滤器,其特征在于,锚形钩的尖端部分朝向各支杆的聚拢端方向弯翘。 5. vena cava filter according to claim 4, characterized in that the anchor-shaped hook portion toward the tip end of each strut bunching warping direction.
6. 如权利要求5所述的腔静脉滤器,其特征在于,每根加捻支杆的至少一部分金属丝在靠近支杆发散端处保持原延伸方向,且长出锚形钩部分作为限定锚形钩刺入血管深度的限位件。 6. A Vena Cava Filter according to claim 5, wherein at least a portion of each twisted wire rods are retained at the end close to the extending direction of the struts diverging, and grow as the anchor portion defines an anchor-shaped hook shaped hooks piercing the blood vessel depth limiting member.
7. 如权利要求4所述的腔静脉滤器,其特征在于,加捻支杆由两根金属丝捻绕而成,一根靠近发散端处弯折形成锚定钩,另一根靠近发散端处保持原延伸方向。 7. vena cava filter according to claim 4, characterized in that the struts twisted about the two wires are twisted to a bend formed near the discharge end of the anchor hooks, the other near the discharge end original extending direction of the holding.
8. 如权利要求4所述的腔静脉滤器,其特征在于,加捻支杆由三根金属丝捻绕而成,一根靠近发散端处弯折形成锚定钩,另两根靠近发散端处保持原延伸方向。 8. vena cava filter according to claim 4, characterized in that the struts twisted about three wires twisted together, a bent is formed near the discharge end of the anchor hooks, the other two near the discharge end of the maintain the original extending direction.
9. 如权利要求1所述的腔静脉滤器,其特征在于,加捻支杆在靠近发散端处为与血管壁相贴的抵靠段,加捻支杆的多根金属丝至少在抵靠段加捻。 9. A Vena Cava Filter according to claim 1, characterized in that the twisted rod is affixed to the vessel wall with abutting section, a plurality of twisted wire struts abutting against at least proximate diverging ends twisting section.
10. 如权利要求1所述的腔静脉滤器,其特征在于,还设有辅助支杆,释放状态下各辅助支杆由聚拢端福射状向外延伸,且分布在各支杆聚拢端的外周。 10. Vena Cava Filter according to claim 1, wherein further an auxiliary struts, each secondary strut extending from the released state are radially outwardly gather end-fu, and distributed in the arms of the outer peripheral end bunching .
11. 如权利要求1〜10任一项所述的腔静脉滤器,其特征在于,所有支杆沿周向间隔分布有多组,相邻两组支杆中,一组为加捻支杆,另一组为不加捻支杆。 11. The vena cava filter according to any of claims 1~10, characterized in that all struts circumferentially spaced plurality of groups, two adjacent sets of struts, struts twisting a group, another group is not twisted rods.
12. 如权利要求11所述的腔静脉滤器,其特征在于,各加捻支杆在靠近聚拢端的部位, 各金属丝开捻互绕编织成网格结构。 12. Vena Cava Filter according to claim 11, wherein each of the twisted struts gather near the end parts of the wires twisted around each other to open woven mesh structure.
13. 如权利要求11所述的腔静脉滤器,其特征在于,加捻支杆的加捻方式为多根金属丝互绕,捻度由聚拢端至发散端均匀分布或非均匀分布。 13. Vena Cava Filter according to claim 11, characterized in that the twisted struts twisting manner to a plurality of wires around each other, twist bunching from the end to the discharge end of uniform or non-uniform distribution.
14. 如权利要求13所述的腔静脉滤器,其特征在于,每根加捻支杆上,聚拢端的捻度小于发散端的捻度。 14. The vena cava filter according to claim 13, characterized in that, on each twisted struts is smaller than the twist bunching end of the discharge end of the twist.
15. 如权利要求11所述的腔静脉滤器,其特征在于,加捻支杆的加捻方式为:以若干根金属丝为芯丝,其余金属丝螺旋缠绕在芯丝外周,缠绕节距由聚拢端至发散端均匀分布或非均匀分布。 15. Vena Cava Filter according to claim 11, characterized in that the twisted struts twisting way: a plurality of wires to a core wire, the rest of the wire wound around the outer periphery of the coil core wire, a winding pitch end-to-end gather diverging uniform or non-uniform distribution.
16. 如权利要求15所述的腔静脉滤器,其特征在于,每根加捻支杆上,聚拢端的缠绕节距大于发散端的缠绕节距。 16. The vena cava filter according to claim 15, characterized in that, on each twisted struts gathered end winding pitch greater than the pitch of the discharge end of the winding.
17. 如权利要求15所述的腔静脉滤器,其特征在于,芯丝靠近发散端处保持原延伸方向,绕在芯丝外周的至少一根金属丝在发散端处弯折形成锚形钩。 17. The vena cava filter according to claim 15, characterized in that, near the discharge end of the core wire extending in the direction of the original holder, the outer periphery of the core wire wound around at least one wire bent to form an anchor-shaped hook at the discharge end.
CN201611100007.6A 2016-12-02 2016-12-02 A kind of vena cava filter CN106725996B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611100007.6A CN106725996B (en) 2016-12-02 2016-12-02 A kind of vena cava filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611100007.6A CN106725996B (en) 2016-12-02 2016-12-02 A kind of vena cava filter

Publications (2)

Publication Number Publication Date
CN106725996A true CN106725996A (en) 2017-05-31
CN106725996B CN106725996B (en) 2019-06-18

Family

ID=58884408

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611100007.6A CN106725996B (en) 2016-12-02 2016-12-02 A kind of vena cava filter

Country Status (1)

Country Link
CN (1) CN106725996B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108992202A (en) * 2018-08-14 2018-12-14 内蒙古工业大学 Damage-free recyclable vena cava filter
WO2019000513A1 (en) * 2017-06-28 2019-01-03 上海宏普医疗器械有限公司 Semi-closed double-supporting recyclable type vena cava filter

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6214025B1 (en) * 1994-11-30 2001-04-10 Boston Scientific Corporation Self-centering, self-expanding and retrievable vena cava filter
US6258026B1 (en) * 1998-09-25 2001-07-10 Nitinol Medical Technologies, Inc. Removable embolus blood clot filter and filter delivery unit
US20060015137A1 (en) * 2004-07-19 2006-01-19 Wasdyke Joel M Retrievable intravascular filter with bendable anchoring members
US20060095068A1 (en) * 2004-11-03 2006-05-04 Wasdyke Joel M Retrievable vena cava filter
CN103815984A (en) * 2014-03-11 2014-05-28 科塞尔医疗科技(苏州)有限公司 Thrombus filter and release system thereof
CN104825247A (en) * 2009-07-29 2015-08-12 C·R·巴德公司 Tubular filter
CN105726158A (en) * 2016-04-19 2016-07-06 上海形状记忆合金材料有限公司 Woven type vena cava filter and weaving method
CN206499550U (en) * 2016-12-02 2017-09-19 杭州唯强医疗科技有限公司 Vena cava filter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6214025B1 (en) * 1994-11-30 2001-04-10 Boston Scientific Corporation Self-centering, self-expanding and retrievable vena cava filter
US6258026B1 (en) * 1998-09-25 2001-07-10 Nitinol Medical Technologies, Inc. Removable embolus blood clot filter and filter delivery unit
US20060015137A1 (en) * 2004-07-19 2006-01-19 Wasdyke Joel M Retrievable intravascular filter with bendable anchoring members
US20060095068A1 (en) * 2004-11-03 2006-05-04 Wasdyke Joel M Retrievable vena cava filter
CN104825247A (en) * 2009-07-29 2015-08-12 C·R·巴德公司 Tubular filter
CN103815984A (en) * 2014-03-11 2014-05-28 科塞尔医疗科技(苏州)有限公司 Thrombus filter and release system thereof
CN105726158A (en) * 2016-04-19 2016-07-06 上海形状记忆合金材料有限公司 Woven type vena cava filter and weaving method
CN206499550U (en) * 2016-12-02 2017-09-19 杭州唯强医疗科技有限公司 Vena cava filter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019000513A1 (en) * 2017-06-28 2019-01-03 上海宏普医疗器械有限公司 Semi-closed double-supporting recyclable type vena cava filter
CN108992202A (en) * 2018-08-14 2018-12-14 内蒙古工业大学 Damage-free recyclable vena cava filter

Also Published As

Publication number Publication date
CN106725996B (en) 2019-06-18

Similar Documents

Publication Publication Date Title
US9011521B2 (en) Methods and apparatus for endovascularly replacing a patient's heart valve
US8246678B2 (en) Methods and apparatus for endovascularly replacing a patient's heart valve
US9801744B2 (en) Methods and apparatus for luminal stenting
JP5506193B2 (en) Prosthetic valve assembly
JP5222290B2 (en) Vascular filter
US9526609B2 (en) Methods and apparatus for endovascularly replacing a patient's heart valve
CA2403613C (en) Repositionable and recapturable vascular stent/graft
US7329279B2 (en) Methods and apparatus for endovascularly replacing a patient's heart valve
RU2446773C2 (en) Multilayered woven constructions for occlusion of vascular defects
US10258465B2 (en) Methods and apparatus for endovascular heart valve replacement comprising tissue grasping elements
US9510845B2 (en) Methods for maintaining a filtering device within a lumen
US9408728B2 (en) Procedures for vascular occlusion
AU2007329243B2 (en) System and method for transapical delivery of an annulus anchored self-expanding valve
US6402777B1 (en) Radiopaque stent markers
US7445631B2 (en) Methods and apparatus for endovascularly replacing a patient's heart valve
AU2008347264B2 (en) Endoluminal filter with fixation
JP5154799B2 (en) Vascular implant
EP2237749B1 (en) Stent designs for use with one or more trigger wires
US4781177A (en) Blood clots filtering device
US20040193209A1 (en) Retrievable filter
CN102176870B (en) Device for opening occluded blood vessels
CN101605509B (en) Stent systems
CA2636419C (en) Removable blood conduit filter
EP2192878B1 (en) Flexible stent with torque-absorbing connectors
JP5778183B2 (en) Semi-flexible annuloplasty ring

Legal Events

Date Code Title Description
PB01 Publication
SE01 Entry into force of request for substantive examination