WO2022206836A1 - Spring coil delivery system and device - Google Patents

Spring coil delivery system and device Download PDF

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Publication number
WO2022206836A1
WO2022206836A1 PCT/CN2022/084059 CN2022084059W WO2022206836A1 WO 2022206836 A1 WO2022206836 A1 WO 2022206836A1 CN 2022084059 W CN2022084059 W CN 2022084059W WO 2022206836 A1 WO2022206836 A1 WO 2022206836A1
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Prior art keywords
diameter
ring
coil
push rod
recovery
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PCT/CN2022/084059
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French (fr)
Chinese (zh)
Inventor
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 WO2022206836A1 publication Critical patent/WO2022206836A1/en

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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

Definitions

  • 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 solution provided by the present invention is a coil delivery system.
  • the coil delivery system includes: a coil including a body portion having a first diameter and a proximal portion having a second diameter and connected to the body portion; a retrieval ring sleeved over the On the end of the proximal portion away from the main body portion, the outer diameter of the recovery ring is a third diameter, wherein the first diameter is greater than the third diameter, and the third diameter is greater than the second diameter; a microcatheter for insertion into a blood vessel a delivery device adapted to deliver the coil in a microcatheter, the delivery device comprising: a push rod for delivering the coil in the microcatheter Core wire; a tubular push rod suitable for being inserted into the microcatheter and sleeved on the push rod core wire, the end of the tubular push rod close to the spring coil includes a half-ring portion, and the inner surface of the half-ring portion is in clearance
  • the length of the first accommodating cavity is greater than or equal to the length of the recovery ring.
  • the inner diameters of the half ring portion and the snap ring are both equal to or greater than the third diameter, and when greater than the third diameter, the inner diameter of the half ring portion or the snap ring is not greater than the third diameter. 110% of the third diameter.
  • the diameter of the second accommodating cavity is equal to or larger than the second diameter, and when it is larger than the second diameter, the diameter of the second accommodating cavity is not larger than 110% of the second diameter.
  • the length of the second accommodating cavity is equal to or less than the length of the proximal end portion of the spring coil located between the recovery ring and the main body portion, and when the length of the proximal end portion is smaller than the length of the proximal end portion located between the recovery ring and the main body portion
  • the length of the second accommodating cavity is not less than 85% of the length of the portion of the proximal end portion located between the recovery ring and the main body 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.
  • a solution provided by the present invention is a coil delivery device, the coil includes a body portion having a first diameter and a proximal portion having a second diameter and connected to the body portion; the proximal portion has a A recovery ring is sleeved on the end away from the main body portion, and the outer diameter of the recovery ring is a third diameter, wherein the first diameter is larger than the third diameter, and the third diameter is larger than the second diameter; the delivery device includes: A push rod core wire for delivering spring coils in a microcatheter; a tubular push rod that is adapted to be inserted into the microcatheter and sleeved on the push rod core wire, the end of the tubular push rod close to the coil includes a half ring portion, the half ring The inner surface of the ring portion is in clearance fit with the recovery ring; and a snap ring, the snap ring is in the shape of a half ring and is adapted to be matched to the half ring portion,
  • the length of the first accommodating cavity is greater than or equal to the length of the recovery ring.
  • the inner diameters of the half ring portion and the snap ring are both equal to or greater than the third diameter, and when greater than the third diameter, the inner diameter of the half ring portion or the snap ring is not greater than the third diameter. 110% of the third diameter.
  • the diameter of the second accommodating cavity is equal to or larger than the second diameter, and when it is larger than the second diameter, the diameter of the second accommodating cavity is not larger than 110% of the second diameter.
  • the length of the second accommodating cavity is equal to or less than the length of the proximal end portion of the spring coil located between the recovery ring and the main body portion, and when the length of the proximal end portion is smaller than the length of the proximal end portion located between the recovery ring and the main body portion
  • the length of the second accommodating cavity is not less than 85% of the length of the portion of the proximal end portion located between the recovery ring and the main body 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 present invention has the advantages of simple structure and low cost, can stably transport the coil into the human body where the thrombus is required to be occluded, can realize instant release during release, and is easy to recover the coil through the recovery ring when needed. , the operation method is simple and convenient, and the damage to the blood vessels is avoided.
  • 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 an embodiment of the invention: Figure 3a shows the coil being fully pushed out of the microcatheter; Figure 3b shows the distal half-ring of the tubular push rod Disengaged from the coil; Figure 3c shows the coil disengaged from the delivery system.
  • Microcatheter 2. Push rod core wire; 3. Tubular push rod; 32, Half ring part; 4, snap ring; 5, spring coil; 52, main body part;
  • the first embodiment of the present invention relates to a coil delivery system.
  • the delivery system includes a microcatheter 1, a coil 5, a retrieval ring 6 and a delivery device.
  • Coil 5 includes a body portion 52 having a first diameter and a proximal portion 53 having a second diameter and connected to the body portion.
  • the recovery ring 6 is sleeved on the end of the proximal portion 53 away from the main body portion 52, and the outer diameter of the recovery ring 6 is a third diameter, wherein the first diameter is larger than the third diameter, and the third diameter is larger than the second diameter diameter.
  • 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 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 a clearance fit with the recovery ring 6 .
  • the snap ring 4 is in the shape of a half ring and is adapted to fit to 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 and the recovery ring 6 are in clearance fit, and the second accommodating cavity and the proximal end portion 53 located between the recovery ring 6 and the main body portion 52 Partial clearance fit.
  • the inner diameter of the half ring portion 32 is equal to or slightly larger than the diameter of the recovery ring 6 (ie the third diameter), and When larger than the diameter of the recovery ring 6 , the inner diameter of the half ring portion 32 is not greater than 110% of the diameter of the recovery ring 6 .
  • the diameter of the first accommodating cavity is equal to or slightly larger than the diameter of the recovery ring 6 (ie, the third diameter), and when it is larger than the diameter of the recovery ring 6 , the diameter of the first accommodating cavity is not greater than 110% of the diameter of the recovery ring 6 .
  • the diameter of the second accommodating cavity is equal to or slightly larger than the proximal end portion 53 of the spring 5
  • the diameter of the second accommodating cavity ie, the second diameter
  • the diameter of the second accommodating cavity is not greater than 110% of the diameter of the proximal end 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 recovery ring 6 , so that the first accommodating cavity can have enough space to accommodate the recovery ring 6 and the elbow of the push rod core wire 2 .
  • 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 recovery ring 6
  • a connection space may be reserved by means of a groove or the like 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 portion of the proximal end portion 53 of the spring coil 5 located between the recovery ring 6 and the main body portion 52 .
  • the second accommodating cavity is snapped between the recovery ring 6 and the main body portion 52 of the spring coil and fixed in the length direction, so as to accurately control the position of the spring coil 5 during delivery and release.
  • the length of the second accommodating cavity may also be slightly smaller than the length of the portion of the proximal end portion 53 of the spring coil 5 located between the recovery ring 6 and the main body portion 52.
  • the first The length of the two accommodating chambers is not less than 85% of the length of the portion of the proximal portion 53 located between the recovery ring 6 and the main body portion 52 .
  • 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 of the tubular push rod 3 are not greater than 110% of 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 recovery ring may be a closed annular member made of platinum-tungsten alloy, platinum-iridium alloy and other materials. Compared with general metal materials, such materials have higher density and better developability, which facilitates the positioning of the spring coil 5 , which is more conducive to the accurate delivery, release and recovery process of the spring coil 5 in the microcatheter 1 . .
  • the recovery ring 6 is easy to process and can be easily sleeved on the proximal end portion 53 of the spring coil 5 by means of snapping or the like, and helps to increase the stability of the spring coil 5 .
  • 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 recovery ring 6, and the second accommodating cavity of the snap ring 4 accommodates the portion between the recovery ring 6 and the main body portion 52 of the proximal end portion 53 of the spring coil 5 , the snap ring 4 is matched to the half-ring portion of the tubular push rod 3, and is snapped to each other by the restraining action of the microcatheter 1), and is 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 retaining ring 4 are 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.

Abstract

A spring coil delivery system and device. The system comprises a spring coil (5) comprising a body portion (52) having a first diameter and a proximal portion (53) having a second diameter and connected to the body portion (52); a recovery ring (6) sleeved on an end portion of the proximal portion (53), an outer diameter being a third diameter, the first diameter being greater than the third diameter, and the third diameter being greater than the second diameter; a microcatheter (1); and the delivery device adapted to deliver the spring coil (5) in the microcatheter (1), comprising: a push rod core wire (2), a tubular push rod (3) comprising a half ring portion (32) in a clearance fit with the recovery ring (6), and a snap ring (4) having a semi-ring shape and adapted to match the half ring portion (32), wherein a first accommodation cavity and a second accommodation cavity are provided in the snap ring (4), the first accommodation cavity is in clearance fit with the recovery ring (6), and the second accommodation cavity is in clearance fit with the portion of the proximal end portion (53) located between the recovery ring (6) and the body portion (52). The structure is simple and facilitates the release and recovery of the spring coil (5).

Description

弹簧圈递送***和弹簧圈递送装置Coil Delivery System and Coil Delivery Device
相关申请的交叉引用CROSS-REFERENCE TO RELATED APPLICATIONS
本申请要求2021年3月30日提交的申请号为202120651974.1的中国专利申请的优先权，其全部内容通过引用并入本文。This application claims priority to Chinese patent application No. 202120651974.1 filed on March 30, 2021, the entire contents of which are incorporated herein by reference.
技术领域technical field
本发明涉及一种弹簧圈递送***和弹簧圈递送装置。The present invention relates to a coil delivery system and a coil delivery device.
背景技术Background technique
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、***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。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.
使用弹簧圈动脉瘤时，弹簧圈和递送***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。When using a coil aneurysm, the coil and the delivery system need to be released to complete the release of the coil. At present, there are four main ways to release the coil: hydrolysis, electrolysis, thermal fusion and mechanical release. 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. After the electric welding is cooled, the welding part will be uneven, and it is easy to generate a relatively high voltage, which makes it difficult to control the time for the electrolytic detachment of the spring coil from the introduction sheath. 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.
本领域还缺少一种结构简单、操作简便、安全可靠、易于回收的弹簧圈递送***或装置。There is also a lack of a coil delivery system or device with a simple structure, simple operation, safety, reliability and easy recovery in the art.
因此，需要一种弹簧圈的递送***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，并且在需要 时易于回收弹簧圈。Therefore, there is a need for a coil delivery system and device that can stably deliver the coil into the human body at a location where thrombus occlusion is desired, then easily release the coil, and easily retrieve the coil when needed.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供一种弹簧圈的递送***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。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.
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***。所述弹簧圈递送***包括：弹簧圈，所述弹簧圈包括具有第一直径的主体部分和具有第二直径且与主体部分连接的近端部分；回收环，所述回收环套设于所述近端部分的远离所述主体部分的端部上，所述回收环的外部直径为第三直径，其中第一直径大于第三直径，第三直径大于第二直径；微导管，用于***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***微导管中套在推送杆芯丝上的管状推送杆，管状推送杆靠近弹簧圈的端部包括半环部分，所述半环部分的内表面与所述回收环间隙配合；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；所述第一容纳腔与所述回收环间隙配合；所述第二容纳腔与所述近端部分中位于回收环和主体部分之间的部分间隙配合；其中所述推送杆芯丝与所述卡环固定连接。In order to achieve the above object, on the one hand, the solution provided by the present invention is a coil delivery system. The coil delivery system includes: a coil including a body portion having a first diameter and a proximal portion having a second diameter and connected to the body portion; a retrieval ring sleeved over the On the end of the proximal portion away from the main body portion, the outer diameter of the recovery ring is a third diameter, wherein the first diameter is greater than the third diameter, and the third diameter is greater than the second diameter; a microcatheter for insertion into a blood vessel a delivery device adapted to deliver the coil in a microcatheter, the delivery device comprising: a push rod for delivering the coil in the microcatheter Core wire; a tubular push rod suitable for being inserted into the microcatheter and sleeved on the push rod core wire, the end of the tubular push rod close to the spring coil includes a half-ring portion, and the inner surface of the half-ring portion is in clearance fit with the recovery ring ; and a snap ring, the snap ring is in the shape of a half ring and is suitable for matching to the half ring portion, and a first accommodating cavity and a second accommodating cavity are arranged in the snap ring; the first accommodating cavity and the The recovery ring is in clearance fit; the second accommodating cavity is in clearance fit with a portion of the proximal end portion located between the recovery ring and the main body portion; wherein the push rod core wire is fixedly connected with the snap ring.
优选的，所述第一容纳腔的长度大于或等于所述回收环的长度。Preferably, the length of the first accommodating cavity is greater than or equal to the length of the recovery ring.
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三直径，且当大于所述第三直径时，所述半环部分或所述卡环的内径不大于所述第三直径的110％。Preferably, the inner diameters of the half ring portion and the snap ring are both equal to or greater than the third diameter, and when greater than the third diameter, the inner diameter of the half ring portion or the snap ring is not greater than the third diameter. 110% of the third diameter.
优选的，所述第二容纳腔的直径等于或大于所述第二直径，且当大于所述第二直径时，所述第二容纳腔的直径不大于所述第二直径的110％。Preferably, the diameter of the second accommodating cavity is equal to or larger than the second diameter, and when it is larger than the second diameter, the diameter of the second accommodating cavity is not larger than 110% of the second diameter.
优选的，所述第二容纳腔的长度等于或小于弹簧圈的所述近端部分中位于回收环和主体部分之间的部分的长度，且当小于近端部分中位于回收环和主体部分之间的部分的长度时，所述第二容纳腔的长度不小于所述近端部分中位于回收环和主体部分之间的部分的长度的85％。Preferably, the length of the second accommodating cavity is equal to or less than the length of the proximal end portion of the spring coil located between the recovery ring and the main body portion, and when the length of the proximal end portion is smaller than the length of the proximal end portion located between the recovery ring and the main body portion When the length of the intervening portion is determined, the length of the second accommodating cavity is not less than 85% of the length of the portion of the proximal end portion located between the recovery ring and the main body portion.
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％。Preferably, 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.
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。Preferably, 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.
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。Preferably, a portion of the tubular push rod close to the half ring portion is provided with a helical cut groove.
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和具有第二直径且与主体部分连接的近端部分；所述近端部分的远离所述主体部分的端部上套设有回收环，所述回收环的外部直径为第三直径，其中第一直径大于第三直径，第三直径大于第二直径；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***微导管中套在推送杆芯丝上的管状推送杆，管状推送杆靠近弹簧圈的端部包括半环部分，所述半环部分的内表面与所述回收环间隙配合；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；所述第一容纳腔与所述回收环间隙配合；所述第二容纳腔与所述近端部分中位于回收环和主体部分之间的部分间隙配合；其中所述推送杆芯丝与所述卡环固定连接。In another aspect, a solution provided by the present invention is a coil delivery device, the coil includes a body portion having a first diameter and a proximal portion having a second diameter and connected to the body portion; the proximal portion has a A recovery ring is sleeved on the end away from the main body portion, and the outer diameter of the recovery ring is a third diameter, wherein the first diameter is larger than the third diameter, and the third diameter is larger than the second diameter; the delivery device includes: A push rod core wire for delivering spring coils in a microcatheter; a tubular push rod that is adapted to be inserted into the microcatheter and sleeved on the push rod core wire, the end of the tubular push rod close to the coil includes a half ring portion, the half ring The inner surface of the ring portion is in clearance fit with the recovery ring; and a snap ring, the snap ring is in the shape of a half ring and is adapted to be matched to the half ring portion, the snap ring is provided with a first accommodating cavity and a second Two accommodating cavities; the first accommodating cavity is in clearance fit with the recovery ring; the second accommodating cavity is in clearance fit with the portion of the proximal end portion located between the recovery ring and the main body portion; wherein the push rod core The wire is fixedly connected with the snap ring.
优选的，所述第一容纳腔的长度大于或等于所述回收环的长度。Preferably, the length of the first accommodating cavity is greater than or equal to the length of the recovery ring.
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三直径，且当大于所述第三直径时，所述半环部分或所述卡环的内径不大于所述第三直径的110％。Preferably, the inner diameters of the half ring portion and the snap ring are both equal to or greater than the third diameter, and when greater than the third diameter, the inner diameter of the half ring portion or the snap ring is not greater than the third diameter. 110% of the third diameter.
优选的，所述第二容纳腔的直径等于或大于所述第二直径，且当大于所述第二直径时，所述第二容纳腔的直径不大于所述第二直径的110％。Preferably, the diameter of the second accommodating cavity is equal to or larger than the second diameter, and when it is larger than the second diameter, the diameter of the second accommodating cavity is not larger than 110% of the second diameter.
优选的，所述第二容纳腔的长度等于或小于弹簧圈的所述近端部分中位于回收环和主体部分之间的部分的长度，且当小于近端部分中位于回收环和主体部分之间的部分的长度时，所述第二容纳腔的长度不小于所述近端部分中位于回收环和主体部分之间的部分的长度的85％。Preferably, the length of the second accommodating cavity is equal to or less than the length of the proximal end portion of the spring coil located between the recovery ring and the main body portion, and when the length of the proximal end portion is smaller than the length of the proximal end portion located between the recovery ring and the main body portion When the length of the intervening portion is determined, the length of the second accommodating cavity is not less than 85% of the length of the portion of the proximal end portion located between the recovery ring and the main body portion.
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％。Preferably, 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.
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。Preferably, 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.
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。Preferably, a portion of the tubular push rod close to the half ring portion is provided with a helical cut groove.
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，并且在 需要时易于通过回收环回收弹簧圈，操作方式简单、方便，避免了对血管造成损伤。Compared with the prior art, the present invention has the advantages of simple structure and low cost, can stably transport the coil into the human body where the thrombus is required to be occluded, can realize instant release during release, and is easy to recover the coil through the recovery ring when needed. , the operation method is simple and convenient, and the damage to the blood vessels is avoided.
附图说明Description of drawings
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：The accompanying drawings illustrate, by way of example and not limitation, embodiments of the present invention, and in which:
图1示出了根据本发明的一个实施例的弹簧圈递送***；Figure 1 shows a coil delivery system according to one embodiment of the present invention;
图2示出了根据本发明的一个实施例的弹簧圈递送***的组装后的剖视结构；Figure 2 shows an assembled cross-sectional structure of a coil delivery system according to an embodiment of the present invention;
图3a-3c示出了根据本发明的一个实施例的弹簧圈递送***的解脱过程：其中，图3a示出了弹簧圈被完全推出微导管；图3b示出了管状推送杆远端半环与弹簧圈脱离；图3c示出了弹簧圈从递送***脱离。Figures 3a-3c illustrate the disengagement process of a coil delivery system according to an embodiment of the invention: Figure 3a shows the coil being fully pushed out of the microcatheter; Figure 3b shows the distal half-ring of the tubular push rod Disengaged from the coil; Figure 3c shows the coil disengaged from the delivery system.
附图标记：Reference number:
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；52、主体部分；53、近端部分；6、回收环。1. Microcatheter; 2. Push rod core wire; 3. Tubular push rod; 32, Half ring part; 4, snap ring; 5, spring coil; 52, main body part;
具体实施方式Detailed ways
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。The technical solutions of the present invention will be described in further detail below through the examples and in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.
实施例一Example 1
如图1所示，本发明实施例一涉及一种弹簧圈的递送***。该递送***包括微导管1、弹簧圈5、回收环6和递送装置。弹簧圈5包括具有第一直径的主体部分52和具有第二直径且与主体部分连接的近端部分53。回收环6套设于所述近端部分53的远离所述主体部分52的端部上，回收环6的外部直径为第三直径，其中第一直径大于第三直径，第三直径大于第二直径。微导管1用于***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。As shown in FIG. 1 , the first embodiment of the present invention relates to a coil delivery system. The delivery system includes a microcatheter 1, a coil 5, a retrieval ring 6 and a delivery device. Coil 5 includes a body portion 52 having a first diameter and a proximal portion 53 having a second diameter and connected to the body portion. The recovery ring 6 is sleeved on the end of the proximal portion 53 away from the main body portion 52, and the outer diameter of the recovery ring 6 is a third diameter, wherein the first diameter is larger than the third diameter, and the third diameter is larger than the second diameter diameter. 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.
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***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的内表面与回收环6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，且第一容纳腔与回收环6间隙配合，第二容纳腔与近端部分53中位于回收环6和主体部分52之间的部分间隙配合。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 a clearance fit with the recovery ring 6 . The snap ring 4 is in the shape of a half ring and is adapted to fit to 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 and the recovery ring 6 are in clearance fit, and the second accommodating cavity and the proximal end portion 53 located between the recovery ring 6 and the main body portion 52 Partial clearance fit.
其中，在管状推送杆3的半环部分32的内表面与回收环6的间隙配合中，优选的，半环部分32的内径等于或略大于回收环6的直径(即第三直径)，且当大于回收环6的直径时，半环部分32的内径不大于回收环6的直径的110％。Wherein, in the clearance fit between the inner surface of the half ring portion 32 of the tubular push rod 3 and the recovery ring 6, preferably, the inner diameter of the half ring portion 32 is equal to or slightly larger than the diameter of the recovery ring 6 (ie the third diameter), and When larger than the diameter of the recovery ring 6 , the inner diameter of the half ring portion 32 is not greater than 110% of the diameter of the recovery ring 6 .
其中，在第一容纳腔与回收环6的间隙配合中，优选的，第一容纳腔的直径等于或略大于回收环6的直径(即第三直径)，且当大于回收环6的直径时，第一容纳腔的直径不大于回收环6的直径的110％。Wherein, in the clearance fit between the first accommodating cavity and the recovery ring 6, preferably, the diameter of the first accommodating cavity is equal to or slightly larger than the diameter of the recovery ring 6 (ie, the third diameter), and when it is larger than the diameter of the recovery ring 6 , the diameter of the first accommodating cavity is not greater than 110% of the diameter of the recovery ring 6 .
其中，在第二容纳腔与近端部分53中位于回收环6和主体部分52之间的部分的间隙配合中，优选的，第二容纳腔的直径等于或略大于弹簧5的近端部分53的直径(即第二直径)，且当大于近端部分53的直径时，第二容纳腔的直径不大于近端部分53的直径的110％。Wherein, in the clearance fit between the second accommodating cavity and the portion of the proximal end portion 53 located between the recovery ring 6 and the main body portion 52, preferably, the diameter of the second accommodating cavity is equal to or slightly larger than the proximal end portion 53 of the spring 5 The diameter of the second accommodating cavity (ie, the second diameter), and when larger than the diameter of the proximal end portion 53 , the diameter of the second accommodating cavity is not greater than 110% of the diameter of the proximal end portion 53 .
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回收环6的长度，以使第一容纳腔能够有足够空间容纳回收环6和推送杆芯丝2的弯头。In order to realize the fixed connection between the push rod core wire 2 and the snap ring 4, one end of the push rod core wire 2 close to the spring coil 5 is provided with an elbow, and 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. There are grooves for receiving and clamping elbows. Meanwhile, the length of the first accommodating cavity in the snap ring 4 is greater than the length of the recovery ring 6 , so that the first accommodating cavity can have enough space to accommodate the recovery ring 6 and the elbow of the push rod core wire 2 .
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回收环6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。The fixed connection between the push rod core wire 2 and the snap ring 4 can also use other methods. For example, the push rod core wire 2 may be connected to the end of the snap ring 4 . In this case, the length of the first accommodating cavity in the snap ring 4 may be equal to the length of the recovery ring 6 , and a connection space may be reserved by means of a groove or the like on the tubular push rod 3 .
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。In the context of the present invention, 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. For example, when 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.
优选的，第二容纳腔的长度等于弹簧圈5的近端部分53中位于回收环6和主体部分52之间的部分的长度。在此情况下，第二容纳腔卡合在回收环6和弹簧圈的主体部分52之间并在长度方向上固定，从而准确控制弹簧圈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的近端部分53中位于回收环6和主体部分52之间的部分的长度，优选的，在这种情况下，第二容纳腔的长度不小于近端部分53中位于回收环6和主体部分52之间的部分的长度的85％。Preferably, the length of the second accommodating cavity is equal to the length of the portion of the proximal end portion 53 of the spring coil 5 located between the recovery ring 6 and the main body portion 52 . In this case, the second accommodating cavity is snapped between the recovery ring 6 and the main body portion 52 of the spring coil and fixed in the length direction, so as to accurately control the position of the spring coil 5 during delivery and release. In other embodiments, the length of the second accommodating cavity may also be slightly smaller than the length of the portion of the proximal end portion 53 of the spring coil 5 located between the recovery ring 6 and the main body portion 52. Preferably, in this case, the first The length of the two accommodating chambers is not less than 85% of the length of the portion of the proximal portion 53 located between the recovery ring 6 and the main body portion 52 .
优选的，卡环4和半环部分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的半环部分的直径不大于弹簧圈5的主体部分52的直径的110％。Preferably, the diameter of the snap ring 4 and the half ring portion 32 is equal to the first diameter. At this time, 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. In other embodiments, 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 . Preferably, when larger than the diameter of the body portion 52 of the spring coil 5 , the diameters of the snap ring 4 and the half ring portion of the tubular push rod 3 are not greater than 110% of the diameter of the body portion 52 of the spring coil 5 .
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。Preferably, 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.
优选的，回收环可以为由铂钨合金，铂铱合金等材料制成的封闭环形构件。这样的材料相对于一般金属材料具有更高的密度，且显影性更好，便于对弹簧圈5进行定位，从而能够更加有助于弹簧圈5在微导管1中的准确递送、解脱和回收过程。此外，回收环6易于加工且能够方便地通过卡合等方式套设在弹簧圈5的近端部分53上，并有助于增加弹簧圈5的稳定性。Preferably, the recovery ring may be a closed annular member made of platinum-tungsten alloy, platinum-iridium alloy and other materials. Compared with general metal materials, such materials have higher density and better developability, which facilitates the positioning of the spring coil 5 , which is more conducive to the accurate delivery, release and recovery process of the spring coil 5 in the microcatheter 1 . . In addition, the recovery ring 6 is easy to process and can be easily sleeved on the proximal end portion 53 of the spring coil 5 by means of snapping or the like, and helps to increase the stability of the spring coil 5 .
如图3a至图3c所示，上述弹簧圈的递送***的递送和解脱过程如下：将微导管1***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***微导管1(此时，卡环4的第一容纳腔容纳回收环6，卡环4的第二容纳腔容纳弹簧圈5的近端部分53中位于回收环6和主体部分52之间的部分，卡环4匹配到管状推送杆3的半环部分，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远端半环32与弹簧圈5脱离(如图3b所示)。管状推送杆3远端半环32与弹簧圈5脱离后，回收环6以及弹簧圈5的近端部分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***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。As shown in Figures 3a to 3c, 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 recovery ring 6, and the second accommodating cavity of the snap ring 4 accommodates the portion between the recovery ring 6 and the main body portion 52 of the proximal end portion 53 of the spring coil 5 , the snap ring 4 is matched to the half-ring portion of the tubular push rod 3, and is snapped to each other by the restraining action of the microcatheter 1), and is 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 retaining ring 4 are completely pushed out of the microcatheter 1 (as shown in Figure 3a). After the spring coil 5 is completely pushed out of the microcatheter 1, the tubular push rod 3 is pulled proximally relative to the push rod core wire 2 until the distal half ring 32 of the tubular push rod 3 is disengaged from the spring coil 5 (as shown in Figure 3b). After the distal half ring 32 of the tubular push rod 3 is disengaged from the spring ring 5, the recovery ring 6 and the proximal end portion 53 of the spring ring 5 will be released from the notch of the snap ring 4 because there is no radial restraint (as shown in Figure 3c). Show). After the spring coil 5 is separated from the delivery system, the tubular push rod 3 and the snap ring 4 are withdrawn from the microcatheter 1 together with the push rod core wire 2 to complete the delivery and release of the spring coil 5. Wherein, "proximal end" refers to the end of the device or component away from the affected area, and "distal end" refers to the end of the device or component toward the affected area.
可见，实施例一中所述的一种弹簧圈的递送***，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。It can be seen that 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.
实施例二 Embodiment 2
实施例二为实施例一所描述的弹簧圈的递送***中的递送装置。The second embodiment is the delivery device in the coil delivery system described in the first embodiment.
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。The embodiments of the present invention are not limited to those described in the above-mentioned embodiments, without departing from the spirit and scope of the present invention, those skilled in the art can make various changes and improvements to the present invention in form and detail, and these All are considered to fall within the protection scope of the present invention.

Claims (16)

  1. 一种弹簧圈递送***，其特征在于，包括：A coil delivery system, comprising:
    弹簧圈，所述弹簧圈包括具有第一直径的主体部分和具有第二直径且与主体部分连接的近端部分；a spring coil including a body portion having a first diameter and a proximal portion having a second diameter and connected to the body portion;
    回收环，所述回收环套设于所述近端部分的远离所述主体部分的端部上，所述回收环的外部直径为第三直径，其中第一直径大于第三直径，第三直径大于第二直径；a recovery ring, the recovery ring is sleeved on the end of the proximal portion away from the main body portion, the outer diameter of the recovery ring is a third diameter, wherein the first diameter is larger than the third diameter, the third diameter greater than the second diameter;
    微导管，用于***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a microcatheter for insertion into a blood vessel to accommodate and guide the coil to a diseased site in the blood vessel; and
    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：A delivery device adapted to deliver the coil in a microcatheter, the delivery device comprising:
    用于在微导管中递送弹簧圈的推送杆芯丝；a push rod core wire for delivering coils in a microcatheter;
    适于***微导管中套在推送杆芯丝上的管状推送杆，管状推送杆靠近弹簧圈的端部包括半环部分，所述半环部分的内表面与所述回收环间隙配合；和a tubular push rod adapted to be inserted into the microcatheter and sheathed on the push rod core wire, the end of the tubular push rod close to the spring coil includes a half-ring portion, the inner surface of the half-ring portion is in clearance fit with the recovery ring; and
    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；所述第一容纳腔与所述回收环间隙配合；所述第二容纳腔与所述近端部分中位于回收环和主体部分之间的部分间隙配合；a snap ring, the snap ring is in the shape of a half ring and is suitable for matching to the half ring part, a first accommodating cavity and a second accommodating cavity are arranged in the snap ring; the first accommodating cavity and the recovery a ring clearance fit; the second receiving cavity is a clearance fit with a portion of the proximal end portion located between the recovery ring and the body portion;
    其中所述推送杆芯丝与所述卡环固定连接。The push rod core wire is fixedly connected with the snap ring.
  2. 根据权利要求1所述的弹簧圈递送***，其特征在于，所述第一容纳腔的长度大于或等于所述回收环的长度。The coil delivery system of claim 1, wherein the length of the first receiving cavity is greater than or equal to the length of the recovery ring.
  3. 根据权利要求1所述的弹簧圈递送***，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三直径，且当大于所述第三直径时，所述半环部分或所述卡环的内径不大于所述第三直径的110％。The coil delivery system of claim 1, wherein the inner diameter of the half ring portion and the snap ring are both equal to or greater than the third diameter, and when greater than the third diameter, the The inner diameter of the half ring portion or the snap ring is no greater than 110% of the third diameter.
  4. 根据权利要求1所述的弹簧圈递送***，其特征在于，所述第二容纳腔的直径等于或大于所述第二直径，且当大于所述第二直径时，所述第二容纳腔的直径不大于所述第二直径的110％。The coil delivery system of claim 1, wherein the diameter of the second accommodating cavity is equal to or greater than the second diameter, and when the diameter of the second accommodating cavity is larger than the second diameter, the diameter of the second accommodating cavity The diameter is not greater than 110% of the second diameter.
  5. 根据权利要求1所述的弹簧圈递送***，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近端部分中位于回收环和主体部分之间的部分的长度，且当小于近端部分中位于回收环和主体部分之间的部分的长度时，所述第二容纳腔的长度不小于所述近端部分中位 于回收环和主体部分之间的部分的长度的85％。The coil delivery system of claim 1, wherein the length of the second receiving cavity is equal to or less than the length of the proximal portion of the coil located between the retrieval ring and the body portion, and When being less than the length of the portion of the proximal end portion located between the recovery ring and the main body portion, the length of the second accommodating cavity is not less than 85 times the length of the portion of the proximal end portion located between the recovery ring and the main body portion %.
  6. 根据权利要求1-5中任一项所述的弹簧圈递送***，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％。The coil delivery system of any one of claims 1-5, wherein the snap ring and the half ring portion have diameters equal to or greater than the first diameter, and when greater than the first diameter In diameter, the diameter of the snap ring and the half ring portion is no greater than 110% of the first diameter.
  7. 根据权利要求1所述的弹簧圈递送***，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。The coil delivery system according to claim 1, wherein an elbow is provided at one end of the push rod core wire close to the coil, and an inner wall of the first accommodating cavity of the snap ring close to one end of the tubular push rod is provided A groove is provided for accommodating and clamping the elbow.
  8. 根据权利要求1所述的弹簧圈递送***，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。The coil delivery system of claim 1, wherein a portion of the tubular push rod near the half-ring portion is provided with a helical cut groove.
  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和具有第二直径且与主体部分连接的近端部分；所述近端部分的远离所述主体部分的端部上套设有回收环，所述回收环的外部直径为第三直径，其中第一直径大于第三直径，第三直径大于第二直径；所述递送装置包括：A coil delivery device, wherein the coil includes a body portion having a first diameter and a proximal portion having a second diameter and connected to the body portion; a portion of the proximal portion remote from the body portion A recovery ring is sleeved on the end, and the outer diameter of the recovery ring is a third diameter, wherein the first diameter is greater than the third diameter, and the third diameter is greater than the second diameter; the delivery device includes:
    用于在微导管中递送弹簧圈的推送杆芯丝；a push rod core wire for delivering coils in a microcatheter;
    适于***微导管中套在推送杆芯丝上的管状推送杆，管状推送杆靠近弹簧圈的端部包括半环部分，所述半环部分的内表面与所述回收环间隙配合；和a tubular push rod adapted to be inserted into the microcatheter and sheathed on the push rod core wire, the end of the tubular push rod close to the spring coil includes a half-ring portion, the inner surface of the half-ring portion is in clearance fit with the recovery ring; and
    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；所述第一容纳腔与所述回收环间隙配合；所述第二容纳腔与所述近端部分中位于回收环和主体部分之间的部分间隙配合；a snap ring, the snap ring is in the shape of a half ring and is suitable for matching to the half ring part, a first accommodating cavity and a second accommodating cavity are arranged in the snap ring; the first accommodating cavity and the recovery a ring clearance fit; the second receiving cavity is a clearance fit with a portion of the proximal end portion located between the recovery ring and the body portion;
    其中所述推送杆芯丝与所述卡环固定连接。The push rod core wire is fixedly connected with the snap ring.
  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所述回收环的长度。The coil delivery device according to claim 9, wherein the length of the first accommodating cavity is greater than or equal to the length of the recovery ring.
  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三直径，且当大于所述第三直径时，所述半环部分或所述卡环的内径不大于所述第三直径的110％。10. The coil delivery device of claim 9, wherein the inner diameter of the half ring portion and the snap ring are both equal to or greater than the third diameter, and when greater than the third diameter, the The inner diameter of the half ring portion or the snap ring is no greater than 110% of the third diameter.
  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二直径，且当大于所述第二直径时，所述第二容纳腔的直径不大于所述第二直径的110％。The coil delivery device according to claim 9, wherein the diameter of the second accommodating cavity is equal to or greater than the second diameter, and when the diameter of the second accommodating cavity is larger than the second diameter, the diameter of the second accommodating cavity is larger than the second diameter. The diameter is not greater than 110% of the second diameter.
  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近端部分中位于回收环和主体部分之间的部分的长度，且当小于近端部分中位于回收环和主体部分之间的部分的长度时，所述第二容纳腔的长度不小于所述近端部分中位于回收环和主体部分之间的部分的长度的85％。10. The coil delivery device of claim 9, wherein the length of the second receiving cavity is equal to or less than the length of the portion of the proximal end portion of the coil located between the retrieval ring and the body portion, and When being less than the length of the portion of the proximal end portion located between the recovery ring and the main body portion, the length of the second accommodating cavity is not less than 85 times the length of the portion of the proximal end portion located between the recovery ring and the main body portion %.
  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％。14. The coil delivery device of any one of claims 9-13, wherein 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 In diameter, the diameter of the snap ring and the half ring portion is no greater than 110% of the first diameter.
  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。The coil delivery device according to claim 9, wherein an elbow is provided at one end of the push rod core wire close to the coil, and an inner wall of the first accommodating cavity of the snap ring close to one end of the tubular push rod is provided A groove is provided for accommodating and clamping the elbow.
  16. 根据权利要求9所述的弹簧圈递送***，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。10. The coil delivery system of claim 9, wherein a portion of the tubular push rod near the half-ring portion is provided with a helical cut groove.
PCT/CN2022/084059 2021-03-30 2022-03-30 Spring coil delivery system and device WO2022206836A1 (en)

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CN214907580U (en) * 2021-03-30 2021-11-30 上海励楷科技有限公司 Coil delivery system and coil delivery device
CN114652394A (en) * 2022-04-06 2022-06-24 苏州恒瑞宏远医疗科技有限公司 Intravascular thrombus taking-out device

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