WO2022206837A1 - 弹簧圈递送系统和弹簧圈递送装置 - Google Patents

弹簧圈递送系统和弹簧圈递送装置 Download PDF

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Publication number
WO2022206837A1
WO2022206837A1 PCT/CN2022/084065 CN2022084065W WO2022206837A1 WO 2022206837 A1 WO2022206837 A1 WO 2022206837A1 CN 2022084065 W CN2022084065 W CN 2022084065W WO 2022206837 A1 WO2022206837 A1 WO 2022206837A1
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diameter
coil
accommodating cavity
push rod
snap ring
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PCT/CN2022/084065
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English (en)
French (fr)
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刘安
崔亚飞
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上海励楷科技有限公司
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Publication of WO2022206837A1 publication Critical patent/WO2022206837A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord

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  • the present invention relates to a coil delivery system and a coil delivery device.
  • Embolization also known as embolization, is the controlled injection of plugs into the supply blood vessels of diseased organs through arterial or intravenous catheters to occlude them and interrupt blood supply in order to control bleeding, treat tumors and vascular lesions, and The purpose of eliminating the function of diseased organs.
  • Embolization is an important technique in interventional therapy and one of the three major techniques in interventional radiology.
  • Coils are commonly used emboli, which are mechanical emboli and can be used in large, medium and small arteries to permanently occlude blood vessels and have no active effect on the body.
  • the usual surgical strategy is to establish access first, then deliver instruments such as coils to the lesion, push out the coils, and complete the operation.
  • hydrolysis is the purpose of releasing the spring coil with its dissolving characteristics after filling the solvent into the delivery rod. It has the problem that the release method is unstable and the injection of the solvent is easy to increase the pressure of the blood vessel. If the solvent injection amount is insufficient, the spring coil cannot be released. position, it is difficult to achieve liberation.
  • Electrolysis is the welding between the spring coil and the guide wire by electric welding.
  • Hot melt release requires the introduction of current, wires and electrodes, etc., which generates heat through electrical energy. When the heat reaches a certain level, the thermal fuse is blown to realize the release of the coil. When hot-melting, it will cause local damage in the human body and increase the pain of the patient.
  • the current mainstream method of mechanical release is the ferrule type, that is to add a movable connecting rod, the end of the movable connecting rod is a spherical feature, the head end of the movable connecting rod is connected with the spring coil, and the release wire is assembled with the movable connecting rod and put into the conveying introduction. Sheath, coil release is achieved by retracting the release wire.
  • the purpose of the present invention is to provide a coil delivery system and device, which have simple structure, low cost, simple and convenient operation, and avoid damage to blood vessels.
  • the coil delivery system includes:
  • a spring coil comprising a body portion having a first diameter, a proximal portion having a second diameter, and a connecting portion connecting the body portion and the proximal portion, the connecting portion having a third diameter, wherein the first diameter is greater than the second diameter a diameter, the second diameter being greater than the third diameter; a microcatheter for insertion into a blood vessel to receive and guide the coil to a lesion in the blood vessel; and a delivery device adapted to deliver the coil in the microcatheter.
  • the delivery device comprises: a push rod core wire for delivering a spring coil in a microcatheter; a tubular push rod adapted to be inserted into the microcatheter and sheathed on the push rod core wire, and the distal end of the tubular push rod includes a half-ring portion, an inner surface of the half-ring portion adapted for clearance fit with the proximal portion; and a snap ring having a half-ring shape and adapted to mate to the half-ring portion, the snap ring being provided with a first accommodating cavity and a second accommodating cavity; the first accommodating cavity is suitable for clearance fit with the proximal end portion; the second accommodating cavity is suitable for clearance fit with the connecting portion; the push rod core wire and The snap ring is fixedly connected.
  • the length of the first accommodating cavity is greater than or equal to the length of the proximal portion of the coil.
  • the inner diameters of the half ring portion and the snap ring are both equal to or greater than the second diameter, and when greater than the second diameter, the inner diameter of the half ring portion or the snap ring is not greater than the second diameter. 110% of the second diameter.
  • the diameter of the second accommodating cavity is equal to or larger than the third diameter, and when larger than the third diameter, the diameter of the second accommodating cavity is not greater than 105% of the third diameter
  • the length of the second accommodating cavity is equal to or less than the length of the connecting portion of the spring coil, and when it is smaller than the length of the connecting portion of the spring coil, the length of the second accommodating cavity is not less than 85% of the length of the connecting portion.
  • the diameter of the snap ring and the half ring portion is equal to or greater than the first diameter, and when greater than the first diameter, the diameter of the snap ring and the half ring portion is not greater than the diameter of the snap ring and the half ring portion 110% of the first diameter.
  • one end of the push rod core wire close to the spring coil is provided with an elbow, and the inner wall of the first accommodating cavity of the snap ring close to one end of the tubular push rod is provided with a groove for accommodating and clamping the elbow.
  • a portion of the tubular push rod close to the half ring portion is provided with a helical cut groove.
  • the solution provided by the present invention is a coil delivery device, the coil includes a body portion having a first diameter, a proximal portion having a second diameter, and a connecting portion connecting the body portion and the proximal portion, The connecting portion has a third diameter, wherein the first diameter is greater than the second diameter, and the second diameter is greater than the third diameter.
  • the coil delivery device comprises: a push rod core wire for delivering the coil; a tubular push rod adapted to be inserted into the microcatheter and sheathed on the push rod core wire, the distal end of the tubular push rod includes a half-ring portion, the an inner surface of the half-ring portion adapted for clearance fit with the proximal portion; and a snap ring having a half-ring shape and adapted to mate to the half-ring portion, the snap ring having a first an accommodating cavity and a second accommodating cavity; the first accommodating cavity is suitable for clearance fit with the proximal end portion; the second accommodating cavity is suitable for clearance fit with the connecting portion; the push rod core wire and the The snap ring secures the connection.
  • the length of the first accommodating cavity is greater than or equal to the length of the proximal portion of the coil.
  • the inner diameters of the half ring portion and the snap ring are both equal to or greater than the second diameter, and when greater than the second diameter, the inner diameter of the half ring portion or the snap ring is not greater than the second diameter. 110% of the second diameter.
  • the diameter of the second accommodating cavity is equal to or larger than the third diameter, and when it is larger than the third diameter, the diameter of the second accommodating cavity is not larger than 110% of the third diameter.
  • the length of the second accommodating cavity is equal to or less than the length of the connecting portion of the spring coil, and when it is smaller than the length of the connecting portion of the spring coil, the length of the second accommodating cavity is not less than the length of the connecting portion of the spring coil. 85% of the length of the connecting section.
  • the diameter of the snap ring and the half ring portion is equal to or greater than the first diameter, and when greater than the first diameter, the diameter of the snap ring and the half ring portion is not greater than the diameter of the snap ring and the half ring portion 110% of the first diameter.
  • an end of the push rod core wire close to the spring coil is provided with a bend, and a groove is provided on the inner wall of the end of the first accommodating cavity of the snap ring away from the spring coil for accommodating and clamping the bend. head.
  • a portion of the tubular push rod close to the half ring portion is provided with a helical cut groove.
  • the present invention has simple structure and low cost, can stably transport the coil into the body where the thrombus is required to be occluded, can achieve instant release when released, the operation method is simple and convenient, and avoids causing damage to blood vessels. damage.
  • Figure 1 shows a coil delivery system according to one embodiment of the present invention
  • Figure 2 shows an assembled cross-sectional structure of a coil delivery system according to an embodiment of the present invention
  • Figures 3a-3c illustrate the disengagement process of a coil delivery system according to one embodiment of the present invention: wherein, Figure 3a shows the coil being completely withdrawn from the microcatheter; Figure 3b shows the tubular push rod distal half-ring Disengaged from the coil; Figure 3c shows the coil disengaged from the delivery system.
  • Micro catheter 2. Push rod core wire; 3. Tubular push rod; 32, Half ring part; 4, Snap ring; 5, Spring coil; 51, Proximal part;
  • the first embodiment of the present invention relates to a coil delivery system.
  • the delivery system includes a microcatheter 1, a coil 5 and a delivery device.
  • the microcatheter 1 is used to be inserted into a blood vessel to accommodate the coil 5 and guide the coil 5 to a lesion in the blood vessel.
  • the coil 5 includes a main body portion 52 having a first diameter, a proximal end portion 51 having a second diameter, and a connecting portion 53 connecting the main body portion and the proximal end portion, the connecting portion 53 having a third diameter, wherein the first diameter is larger than the second diameter diameter, the second diameter is larger than the third diameter.
  • the delivery device is adapted to deliver the coil 5 in the microcatheter 1 .
  • the delivery device includes a push rod core wire 2 , a tubular push rod 3 and a snap ring 4 .
  • the push rod core wire 2 is used to deliver the spring coil 5 in the microcatheter 1 and is fixedly connected with the snap ring 4 .
  • the tubular push rod 3 is suitable for being inserted into the microcatheter, and is sheathed on the push rod core wire 2 .
  • the distal end of the tubular push rod 3 includes a half-ring portion 32 whose inner surface is adapted for a clearance fit with the proximal portion 51 of the spring coil 5 .
  • the snap ring 4 is in the shape of a half ring and is adapted to fit into the half ring portion 32 of the tubular push rod 3 .
  • the snap ring 4 is provided with a first accommodating cavity and a second accommodating cavity.
  • the first accommodating cavity and the second accommodating cavity are both semi-cylindrical, and the first accommodating cavity is suitable for clearance fit with the proximal end portion 51 of the spring coil 5 , and the second accommodating cavity is suitable for the connection portion 53 of the spring coil 5 . Clearance fit.
  • the inner diameter of the half ring portion 32 is equal to or slightly larger than the diameter of the proximal end portion 51 (ie second diameter), and when larger than the diameter of the proximal portion 51 , the inner diameter of the half ring portion 32 is not greater than 110% of the diameter of the proximal portion 51 .
  • the diameter of the first accommodating cavity is equal to or slightly larger than the diameter of the proximal end portion 51 (ie, the second diameter), and when greater than As for the diameter of the proximal end portion 51 , the diameter of the first accommodating cavity is not greater than 110% of the diameter of the proximal end portion 51 .
  • the diameter of the second accommodating cavity is equal to or slightly larger than the diameter of the connecting portion 53 (ie, the third diameter), and when larger than the connecting portion 53 , the diameter of the second accommodating cavity is not greater than 110% of the diameter of the connecting portion 53 .
  • one end of the push rod core wire 2 close to the spring coil 5 is provided with an elbow
  • the inner wall of the first accommodation cavity of the snap ring 4 close to one end of the tubular push rod 3 is provided with an elbow.
  • the length of the first accommodating cavity in the snap ring 4 is greater than the length of the proximal end portion 51 of the spring coil 5, so that the first accommodating cavity can have enough space to accommodate the proximal end portion 51 of the spring coil 5 and the push rod core wire 2. elbow.
  • the fixed connection between the push rod core wire 2 and the snap ring 4 can also use other methods.
  • the push rod core wire 2 may be connected to the end of the snap ring 4 .
  • the length of the first accommodating cavity in the snap ring 4 may be equal to the length of the proximal end portion 51 of the spring coil 5 , and a connecting space may be reserved by arranging grooves on the tubular push rod 3 .
  • a half ring may refer to a substantially cylindrical half shape cut in the direction of the longitudinal axis.
  • the half-ring shape need not be a strictly half-shape without affecting the joint function.
  • the circumferential arc of the half ring of the snap ring 4 is slightly less than 180 degrees
  • the circumferential arc of the half ring portion 32 of the tubular push rod 3 may be slightly more than 180 degrees, so that the two can be joined to form a substantially cylindrical tube body part.
  • the length of the second accommodating cavity is equal to the length of the connecting portion of the spring coil.
  • the second accommodating cavity is snapped on the connecting portion and fixed in the longitudinal direction, so that the position of the spring coil 5 during delivery and release can be accurately controlled.
  • the length of the second accommodating cavity may also be slightly smaller than the length of the connecting portion 53 of the spring coil 5 .
  • the length of the second accommodating cavity is not less than 85% of the length of the connecting portion 53 .
  • the diameter of the snap ring 4 and the half ring portion 32 is equal to the first diameter.
  • the diameters of the tubular push rod 3, the snap ring 4 and the main body portion 52 of the spring coil 5 are substantially the same, which facilitates delivery in the microcatheter.
  • the diameters of the snap ring 4 and the half ring portion 32 of the tubular push rod 3 may also be slightly larger than the diameter (ie, the first diameter) of the main body portion 52 of the spring coil 5 .
  • the diameters of the snap ring 4 and the half ring portion 32 of the tubular push rod 3 are not greater than 110% of the diameter of the main body portion 52 of the spring coil 5 when larger than the diameter of the body portion 52 of the spring coil 5 .
  • the tubular push rod 3 may be a metal tube or a hypotube, and the metal tube may be made of a metal material such as a stainless steel tube, a nickel-titanium tube, or the like.
  • One end of the tubular push rod close to the half ring portion 32 may be partially provided with a helical cut groove to make the tubular push rod more flexible, the ability to bend in the blood vessel is enhanced, and the delivery resistance is reduced.
  • the delivery and release process of the above-mentioned coil delivery system is as follows: insert the microcatheter 1 into a predetermined position in the blood vessel, and insert the snapped coil 5, the snap ring 4 and the tubular push rod 3 into Microcatheter 1 (at this time, the first accommodating cavity of the snap ring 4 accommodates the proximal end portion 51 of the spring coil 5, the second accommodating cavity of the snap ring 4 accommodates the connecting portion 53 of the spring coil 5, and the snap ring 4 is matched to the tubular push rod
  • the half ring portion 32 of 3 and are snapped to each other by the restraining action of the microcatheter 1), and are delivered to the human body through the push rod core wire 2 together with the tubular push rod 3 to the position where thrombus occlusion is required, until the spring coil 5 and the snap ring 4 is completely pushed out of the microcatheter 1 (as shown in Figure 3a).
  • proximal end refers to the end of the device or component away from the affected area
  • distal end refers to the end of the device or component toward the affected area
  • the coil delivery system described in the first embodiment has a simple structure and low cost, and can stably transport the coil into the human body where the thrombus needs to be occluded. Simple, convenient, and avoids damage to blood vessels.
  • the second embodiment is the delivery device in the coil delivery system described in the first embodiment.

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Abstract

一种弹簧圈递送系统和弹簧圈递送装置，该系统包括弹簧圈（5）、微导管（1）和递送装置；弹簧圈（5）包括具有第一直径的主体部分（52）、具有第二直径的近端部分（51）和连接主体部分（52）与近端部分（51）的连接部分（53），连接部分（53）具有第三直径，第一直径大于第二直径，第二直径大于第三直径；递送装置包括：推送杆芯丝（2）；适于插入微导管（1）中套在推送杆芯丝（2）上的管状推送杆（3），管状推送杆（3）的远端包括半环部分（32），半环部分（32）的内表面与近端部分（51）间隙配合；和卡环（4），卡环（4）为半环形状，并适于匹配到半环部分（32），卡环（4）内设有第一容纳腔和第二容纳腔；第一容纳腔与近端部分（51）间隙配合；第二容纳腔与连接部分（53）间隙配合；推送杆芯丝（2）与卡环（4）固定连接。该结构简单且便于弹簧圈（5）解脱。

Description

弹簧圈递送系统和弹簧圈递送装置
相关申请的交叉引用
本申请要求2021年3月30日提交的申请号为202120652091.2的中国专利申请的优先权，其全部内容通过引用并入本文。
技术领域
本发明涉及一种弹簧圈递送系统和弹簧圈递送装置。
背景技术
栓塞术也称栓塞治疗，是经动脉或静脉内导管将塞物有控制地注入到病变器官的供应血管内，使之发生闭塞，中断血供，以期达到控制出血、治疗肿瘤和血管性病变以及消除患病器官功能之目的。栓塞术是介入治疗中的重要技术，也是介入放射学的三大技术之一。弹簧圈是常用的栓塞物，为机械性栓子，可用于大、中小动脉，永久闭塞血管，对机体无活性作用。通常的手术策略是先建立通路，然后将弹簧圈等器械输送到病变部位，推出弹簧圈，完成手术。
使用弹簧圈动脉瘤时，弹簧圈和递送系统需要解脱，完成弹簧圈的释放，目前弹簧圈解脱方式有水解脱、电解脱、热熔解脱和机械解脱四种主要的方式。水解脱是向输送杆内加注溶剂后，以溶解特性来实现释放弹簧圈的目的，它存在解脱方式不稳定的问题而且注入溶剂容易增加血管压力，若溶剂注入量不足又到达不了弹簧圈解脱的位置，难以实现解脱。电解脱是弹簧圈与导丝之间通过电焊焊接在一起。电焊冷却后焊接部分会不均匀，容易产生比较高的电压，导致弹簧圈从导入鞘上电解脱的时间不容易控制。热熔解脱则需要引入电流、电线和电极等，是通过电能产生热量，当热量达到一定程度的时候熔断热熔丝来实现弹簧圈解脱。热熔的时候会导致人体内的局部损伤，增加了患者的痛苦。机械解脱目前主流方法是套圈式，即增加一活动连接杆，活动连接杆末端是球形特征，活动连接杆首端是跟弹簧圈连接，解脱丝是与活动连接杆组装一并放入输送导入鞘，通过回撤解脱丝来实现弹簧圈解脱。
本领域还缺少一种结构简单、操作简便、安全可靠的弹簧圈递送系统或装置。
因此，需要一种弹簧圈的递送系统和装置，以能够稳定地将弹簧圈递送进人体内需要血栓闭塞的位置，然后轻易解脱弹簧圈。
发明内容
本发明的目的在于提供一种弹簧圈的递送系统和装置，其结构简单、成本较低，且操作方式简单、方便，避免了对血管造成损伤。
为达到上述目的，一方面，本发明提供的方案是一种弹簧圈递送系统。所述弹簧圈递送系统包括：
弹簧圈，所述弹簧圈包括具有第一直径的主体部分、具有第二直径的近端部分和连接主体部分与近端部分的连接部分，连接部分具有第三直径，其中第一直径大于第二直径，第二直径大于第三直径；微导管，用于插入血管以容纳弹簧圈并将弹簧圈引导到血管中的病变部位；和适于在微导管中递送所述弹簧圈的递送装置。所述递送装置包括：用于在微导管中递送弹簧圈的推送杆芯丝；适于插入微导管中套在推送杆芯丝上的管状推送杆，管状推送杆的远端包括半环部分，所述半环部分的内表面适于与所述近端部分间隙配合；和卡环，所述卡环为半环形状，并适于匹配到所述半环部分，所述卡环内设有第一容纳腔和第二容纳腔；所述第一容纳腔适于与所述近端部分间隙配合；所述第二容纳腔适于与所述连接部分间隙配合；所述推送杆芯丝与所述卡环固定连接。
优选的，所述第一容纳腔的长度大于或等于弹簧圈的所述近端部分的长度。
优选的，所述半环部分和所述卡环的内径均等于或大于所述第二直径，且当大于所述第二直径时，所述半环部分或所述卡环的内径不大于所述第二直径的110％。
优选的，所述第二容纳腔的直径等于或大于所述第三直径，且当大于所述第三直径时，所述第二容纳腔的直径不大于所述第三直径的105％
优选的，所述第二容纳腔的长度等于或小于弹簧圈的所述连接部分的长度，且当小于所述弹簧圈的所述连接部分的长度时，所述第二容纳腔的长度不小于所述连接部分的长度的85％。
优选的，所述卡环和所述半环部分的直径等于或大于所述第一直径，且当大于所述第一直径时，所述卡环和所述半环部分的直径不大于所述第一直径的110％。
优选的，所述推送杆芯丝靠近弹簧圈的一端设有弯头，所述卡环的第一容纳腔内靠近管状推送杆一端的内壁上设有凹槽，用于容纳并卡紧所述弯头。
优选的，所述管状推送杆的靠近所述半环部分的局部设有螺旋切槽。
另一方面，本发明提供的方案是一种弹簧圈递送装置，所述弹簧圈包括具有第一直径的主体部分、具有第二直径的近端部分和连接主体部分与近端部分的连接部分，连接部分具有第三直径，其中第一直径大于第二直径，第二直径大于第三直径。所述弹簧圈递送装置包括：用于递送弹簧圈的推送杆芯丝；适于插入微导管中套在推送杆芯丝上的管状推送杆，管状推送杆的远端包括半环部分，所述半环部分的内表面适于与所述近端部分间隙配合；和卡环，所述卡环为半环形状，并适于匹配到所述半环部分，所述卡环内设有第一容纳腔和第二容纳腔；所述第一容纳腔适于与所述近端部分间隙配合；所述第二容纳腔适于与所述连接部分间隙配合；所述推送杆芯丝与所述卡环固定连接。
优选的，所述第一容纳腔的长度大于或等于弹簧圈的所述近端部分的长度。
优选的，所述半环部分和所述卡环的内径均等于或大于所述第二直径，且当大于所述第二直径时，所述半环部分或所述卡环的内径不大于所述第二直径的110％。
优选的，所述第二容纳腔的直径等于或大于所述第三直径，且当大于所述第三直径时，所述第二容纳腔的直径不大于所述第三直径的110％。
优选的，所述第二容纳腔的长度等于或小于弹簧圈的所述连接部分的长度，且当小于弹簧圈的所述连接部分的长度时，所述第二容纳腔的长度不小于所述连接部分的长度的85％。
优选的，所述卡环和所述半环部分的直径等于或大于所述第一直径，且当大于所述第一直径时，所述卡环和所述半环部分的直径不大于所述第一直径的110％。
优选的，所述推送杆芯丝靠近弹簧圈的一端设有弯头，所述卡环的第一容纳腔内远离弹簧圈一端的内壁上设有凹槽，用于容纳并卡紧所述弯头。
优选的，所述管状推送杆的靠近所述半环部分的局部设有螺旋切槽。
与现有技术相比，本发明结构简单、成本较低，可以稳定地将弹簧圈输送进人体内需要血栓闭塞的位置，解脱时能实现瞬时解脱，操作方式简单、方便，避免了对血管造成损伤。
附图说明
附图通过示例性但非限制性的方式对本发明的实施例进行图示，且其中：
图1示出了根据本发明的一个实施例的弹簧圈递送系统；
图2示出了根据本发明的一个实施例的弹簧圈递送系统的组装后的剖视结构；
图3a-3c示出了根据本发明的一个实施例的弹簧圈递送系统的解脱过程：其中，图3a示出了弹簧圈被完全退出微导管；图3b示出了管状推送杆远端半环与弹簧圈脱离；图3c示出了弹簧圈与递送系统脱离。
附图标记：
1、微导管；2、推送杆芯丝；3、管状推送杆；32、半环部分；4、卡环；5、弹簧圈；51、近端部分；52、主体部分；53、连接部分。
具体实施方式
下面通过实施例，并结合附图，对本发明的技术方案作进一步详细的说明，但本发明不限于下面的实施例。
实施例一
如图1所示，本发明实施例一涉及一种弹簧圈的递送系统。该递送系统包括微导管1、弹簧圈5和递送装置。微导管1用于插入血管以容纳弹簧圈5并将弹簧圈5引导到血管中的病变部位。弹簧圈5包括具有第一直径的主体部分52、具有第二直径的近端部分51和连接主体部分与近端部分的连接部分53，连接部分53具有第三直径，其中第一直径大于第二直径，第二直径大于第三直径。
递送装置适于在微导管1中递送弹簧圈5。其中，递送装置包括推送杆芯丝2、管状推送杆3和卡环4。推送杆芯丝2用于在微导管1中递送弹簧圈5，且与卡环4固定连接。管状推送杆3适于插入微导管中，且套在推送杆芯丝2上。管状推送杆3的远端包括半环部分32，该半环部分32的内表面适于与弹簧圈5的近端部分51间隙配合。卡环4为半环形状，并适于匹配到管状推送杆3的半环部分32。卡环4内设有第一容纳腔和第二容纳腔。其中，第一容纳腔和第二容纳腔均呈半圆柱型，且第一容纳腔适于与弹簧圈5的近端部分51间隙配合，第二容纳腔适 于与弹簧圈5的连接部分53间隙配合。
其中，在管状推送杆3的半环部分32的内表面与弹簧圈5的近端部分51的间隙配合中，优选的，半环部分32的内径等于或略大于近端部分51的直径(即第二直径)，且当大于近端部分51的直径时，半环部分32的内径不大于近端部分51的直径的110％。
其中，在第一容纳腔与弹簧圈5的近端部分51的间隙配合中，优选的，第一容纳腔的直径等于或略大于近端部分51的直径(即第二直径)，且当大于近端部分51的直径时，第一容纳腔的直径不大于近端部分51的直径的110％。
其中，在第二容纳腔与弹簧圈5的连接部分53的间隙配合中，优选的，第二容纳腔的直径等于或略大于连接部分53的直径(即第三直径)，且当大于连接部分53的直径时，第二容纳腔的直径不大于连接部分53的直径的110％。
为实现推送杆芯丝2和卡环4的固定连接，推送杆芯丝2靠近弹簧圈5的一端设有弯头，卡环4的第一容纳腔内靠近管状推送杆3一端的内壁上设有凹槽，用于容纳并卡紧弯头。同时，卡环4中第一容纳腔的长度大于弹簧圈5的近端部分51的长度，以使第一容纳腔能够有足够空间容纳弹簧圈5的近端部分51和推送杆芯丝2的弯头。
推送杆芯丝2和卡环4的固定连接也可以使用其他方式。例如，推送杆芯丝2可以连接到卡环4的端部。在此情况下，卡环4中第一容纳腔的长度可以等于弹簧圈5的近端部分51的长度，可以通过在管状推送杆3上设置凹槽等方式来留出连接空间。
在本发明的上下文中，半环可以指大体上为圆筒沿着纵向轴线方向剖开的一半形状。在不影响接合功能情况下，半环形状不一定是严格的一半形状。例如，当卡环4的半环的圆周弧度略小于180度的情况下，管状推送杆3的半环部分32的圆周弧度可以略大于180度，使得两者可以接合形成基本上圆筒形管体部分。
优选的，所述第二容纳腔的长度等于弹簧圈的连接部分的长度。在此情况下，第二容纳腔卡合在连接部分上并将其在长度方向上固定，可以准确控制弹簧圈5在递送和解脱时的位置。在其他实施例中，第二容纳腔的长度也可以略小于弹簧圈5的连接部分53的长度。优选的，当小于弹簧圈5的连接部分53的长度时，第二容纳腔的长度不小于连接部分53的长度的85％。
优选的，所述卡环4和所述半环部分32的直径等于所述第一直径。此时，管状推送杆3、卡环4和弹簧圈5的主体部分52的直径基本一致，便于在微导管中的递送。在其他实施例中，卡环4和管状推送杆3的半环部分32的直径也可以略大于弹簧圈5的主体部分52的直径(即第一直径)。优选的，当大于弹簧圈5的主体部分52的直径时，卡环4和管状推送杆3的半环部分32的直径不大于弹簧圈5的主体部分52的直径的110％。
优选的，管状推送杆3可以为金属管或者海波管，金属管例如可以采用诸如不锈钢管、镍钛管等金属材料制成。管状推送杆的靠近半环部分32的一端局部可有螺旋切槽使管状推送杆更柔软，在血管中过弯能力变强，降低递送阻力。
如图3a至图3c所示，上述弹簧圈的递送系统的递送和解脱过程如下：将微导管1插入血管内预定位置，并将卡合的弹簧圈5、卡环4和管状推送杆3插入微导管1(此时，卡环4的第一容纳腔容纳弹簧圈5的近端部分51，卡环4的第二容纳腔容纳弹簧圈5的连接部分53，卡环4匹配到管状推送杆3的半环部分32，并通过微导管1的约束作用彼此卡合)，并通过推送杆芯丝2与管状推送杆3一起递送到人体内需要血栓闭塞的位置，直至弹簧圈5和卡环4被完全推出微导管1(如图3a所示)。弹簧圈5被完全推出微导管1之后，管状推送杆3相对于推送杆芯丝2往近端拉，直至管状推送杆3远端的半环部分32与弹簧圈5脱离(如图3b所示)。管状推送杆3远端半环部分32与弹簧圈5脱离后，弹簧圈5的第一端51以及连接部53由于没有径向约束，会从卡环4的槽口内脱离完成释放(如图3c所示)。弹簧圈5与输送系统脱离后，管状推送杆3和卡环4与推送杆芯丝2一起从微导管1中撤回，完成弹簧圈5的输送和释放。其中，“近端”均是指装置或部件远离患处的一端，“远端”均是指装置或部件趋向于患处一端。
可见，实施例一中所述的一种弹簧圈的递送系统，其结构简单、成本较低，可以稳定地将弹簧圈输送进人体内需要血栓闭塞的位置，解脱时能实现瞬时解脱，操作方式简单、方便，避免了对血管造成损伤。
实施例二
实施例二为实施例一所描述的弹簧圈的递送系统中的递送装置。
本发明的实施方式并不限于上述实施例所述，在不偏离本发明的精 神和范围的情况下，本领域普通技术人员可以在形式和细节上对本发明做出各种改变和改进，而这些均被认为落入了本发明的保护范围。

Claims (16)

  1. 一种弹簧圈递送系统，其特征在于，包括：
    弹簧圈，所述弹簧圈包括具有第一直径的主体部分、具有第二直径的近端部分和连接主体部分与近端部分的连接部分，连接部分具有第三直径，其中第一直径大于第二直径，第二直径大于第三直径；
    微导管，用于插入血管以容纳弹簧圈并将弹簧圈引导到血管中的病变部位；和
    适于在微导管中递送所述弹簧圈的递送装置，所述递送装置包括：
    用于在微导管中递送弹簧圈的推送杆芯丝；
    适于插入微导管中套在推送杆芯丝上的管状推送杆，管状推送杆的远端包括半环部分，所述半环部分的内表面适于与所述近端部分间隙配合；和
    卡环，所述卡环为半环形状，并适于匹配到所述半环部分，所述卡环内设有第一容纳腔和第二容纳腔；所述第一容纳腔适于与所述近端部分间隙配合；所述第二容纳腔适于与所述连接部分间隙配合；
    其中所述推送杆芯丝与所述卡环固定连接。
  2. 根据权利要求1所述的弹簧圈递送系统，其特征在于，所述第一容纳腔的长度大于或等于弹簧圈的所述近端部分的长度。
  3. 根据权利要求1所述的弹簧圈递送系统，其特征在于，所述半环部分和所述卡环的内径均等于或大于所述第二直径，且当大于所述第二直径时，所述半环部分或所述卡环的内径不大于所述第二直径的110％。
  4. 根据权利要求1所述的弹簧圈递送系统，其特征在于，所述第二容纳腔的直径等于或大于所述第三直径，且当大于所述第三直径时，所述第二容纳腔的直径不大于所述第三直径的110％。
  5. 根据权利要求1所述的弹簧圈递送系统，其特征在于，所述第二容纳腔的长度等于或小于弹簧圈的所述连接部分的长度，且当小于所述弹簧圈的所述连接部分的长度时，所述第二容纳腔的长度不小于所述连接部分的长度的85％。
  6. 根据权利要求1-5中任一项所述的弹簧圈递送系统，其特征在 于，所述卡环和所述半环部分的直径等于或大于所述第一直径，且当大于所述第一直径时，所述卡环和所述半环部分的直径不大于所述第一直径的110％。
  7. 根据权利要求1所述的弹簧圈递送系统，其特征在于，所述推送杆芯丝靠近弹簧圈的一端设有弯头，所述卡环的第一容纳腔内靠近管状推送杆一端的内壁上设有凹槽，用于容纳并卡紧所述弯头。
  8. 根据权利要求1所述的弹簧圈递送系统，其特征在于，所述管状推送杆的靠近所述半环部分的局部设有螺旋切槽。
  9. 一种弹簧圈递送装置，其特征在于，所述弹簧圈包括具有第一直径的主体部分、具有第二直径的近端部分和连接主体部分与近端部分的连接部分，连接部分具有第三直径，其中第一直径大于第二直径，第二直径大于第三直径；所述递送装置包括：
    用于递送弹簧圈的推送杆芯丝；
    适于插入微导管中套在推送杆芯丝上的管状推送杆，管状推送杆的远端包括半环部分，所述半环部分的内表面适于与所述近端部分间隙配合；和
    卡环，所述卡环为半环形状，并适于匹配到所述半环部分，所述卡环内设有第一容纳腔和第二容纳腔；所述第一容纳腔适于与所述近端部分间隙配合；所述第二容纳腔适于与所述连接部分间隙配合；
    其中所述推送杆芯丝与所述卡环固定连接。
  10. 根据权利要求9所述的弹簧圈递送装置，其特征在于，所述第一容纳腔的长度大于或等于弹簧圈的所述近端部分的长度。
  11. 根据权利要求9所述的弹簧圈递送装置，其特征在于，所述半环部分和所述卡环的内径均等于或大于所述第二直径，且当大于所述第二直径时，所述半环部分或所述卡环的内径不大于所述第二直径的110％。
  12. 根据权利要求9所述的弹簧圈递送装置，其特征在于，所述第二容纳腔的直径等于或大于所述第三直径，且当大于所述第三直径时， 所述第二容纳腔的直径不大于所述第三直径的110％。
  13. 根据权利要求9所述的弹簧圈递送装置，其特征在于，所述第二容纳腔的长度等于或小于弹簧圈的所述连接部分的长度，且当小于弹簧圈的所述连接部分的长度时，所述第二容纳腔的长度不小于所述连接部分的长度的85％。
  14. 根据权利要求9-13中任一项所述的弹簧圈递送装置，其特征在于，所述卡环和所述半环部分的直径等于或大于所述第一直径，且当大于所述第一直径时，所述卡环和所述半环部分的直径不大于所述第一直径的110％。
  15. 根据权利要求9所述的弹簧圈递送装置，其特征在于，所述推送杆芯丝靠近弹簧圈的一端设有弯头，所述卡环的第一容纳腔内靠近管状推送杆一端的内壁上设有凹槽，用于容纳并卡紧所述弯头。
  16. 根据权利要求9所述的弹簧圈递送装置，其特征在于，所述管状推送杆的靠近所述半环部分的局部设有螺旋切槽。
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CN214907580U (zh) * 2021-03-30 2021-11-30 上海励楷科技有限公司 弹簧圈递送系统和弹簧圈递送装置
CN214907579U (zh) * 2021-03-30 2021-11-30 上海励楷科技有限公司 弹簧圈递送系统和弹簧圈递送装置

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