WO2020052484A1 - 一种取石网篮及用于取石网篮的双腔端帽 - Google Patents

一种取石网篮及用于取石网篮的双腔端帽 Download PDF

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Publication number
WO2020052484A1
WO2020052484A1 PCT/CN2019/104414 CN2019104414W WO2020052484A1 WO 2020052484 A1 WO2020052484 A1 WO 2020052484A1 CN 2019104414 W CN2019104414 W CN 2019104414W WO 2020052484 A1 WO2020052484 A1 WO 2020052484A1
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WO
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Prior art keywords
cavity
end cap
dual
basket
double
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PCT/CN2019/104414
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English (en)
French (fr)
Inventor
徐潮伟
李晓春
李常青
冷德嵘
刘春俊
Original Assignee
南微医学科技股份有限公司
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Application filed by 南微医学科技股份有限公司 filed Critical 南微医学科技股份有限公司
Priority to AU2019338014A priority Critical patent/AU2019338014B2/en
Priority to CA3111301A priority patent/CA3111301C/en
Priority to KR1020217004535A priority patent/KR102536177B1/ko
Priority to EP19859023.4A priority patent/EP3821831A4/en
Priority to US17/270,523 priority patent/US20220125448A1/en
Priority to JP2021506701A priority patent/JP7162727B2/ja
Publication of WO2020052484A1 publication Critical patent/WO2020052484A1/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
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00743—Type of operation; Specification of treatment sites
    • A61B2017/00818—Treatment of the gastro-intestinal system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22038—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire
    • A61B2017/22039—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with a guide wire eccentric
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B2017/22072—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for with an instrument channel, e.g. for replacing one instrument by the other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
    • A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
    • A61B2017/2212—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions having a closed distal end, e.g. a loop

Definitions

  • the present application relates to a stone extraction basket and a double-cavity end cap for the stone extraction basket.
  • ERCP Endoscopic RetroCholangio Pancreatography
  • endoscopic retrograde cholangiopancreatography refers to inserting a duodenum to the lower part of the duodenum, finding a duodenal papilla, and inserting it through a biopsy tube
  • the stone extraction basket is a commonly used stone extraction tool in ERCP accessories to remove stones in the bile duct. Stone baskets are divided into guided wire baskets, non-guided baskets, and integrated stone baskets. They can be divided into "hexagonal", "diamond” and "spiral” according to the shape of the basket.
  • the present application provides a stone extraction net basket, which includes a net basket, an outer tube, and an operation portion.
  • the net basket is connected to the operation portion, and the operation portion can control the movement of the net basket.
  • the proximal end of the outer tube is connected to the operation portion.
  • a double-lumen end cap is provided at the distal end of the outer tube, a guide wire can pass through a lumen of the double-lumen end cap, and the net basket can pass through the double-lumen The other channel of the end cap.
  • the operation portion includes a handle and a core rod, and the handle slides back and forth along the core rod to extend or retract the net basket.
  • the dual-cavity end cap includes a connecting portion and a dual-cavity portion.
  • the cavity of the dual-cavity end cap is a hollow structure, and the hollow structure and the outer tube together form a cavity in which the basket is extended and retracted.
  • the outer surface of one end of the connecting portion has a spiral barb structure for connecting with the outer tube, and the outer surface of the other end of the connecting portion has a protruding structure to connect with the double cavity portion.
  • the protruding structure is a four-corner, hexagonal or octagonal stop structure.
  • connection mode of the connection portion and the double cavity portion is plastic-covered, sticky, or hot-sleeve.
  • the distal end surface of the dual-cavity end cap has a guide bevel structure on one side of a lumen through which a guide wire passes.
  • the thickness of the outer contour of the channel passing through the net basket is greater than the thickness of the outer contour of the channel passing through the guide wire.
  • the present application also provides a dual-cavity end cap for taking a stone basket.
  • the dual-cavity end cap includes a connecting portion and a dual-cavity portion, the dual-cavity portion includes two channels, and a guide wire passes through the dual-cavity portion.
  • One cavity, the basket passes through the other cavity of the double cavity.
  • the outer surface of one end of the connecting portion has a spiral barb structure, and the outer surface of the other end of the connecting portion has a protruding structure.
  • the distal end surface of the double-lumen portion has a guide bevel structure on a side of a lumen through which a guide wire passes.
  • the thickness of the outer contour of the cavity passing through the mesh basket in the double-lumen portion is greater than the thickness of the outer contour of the cavity passing through the guide wire.
  • the connecting portion and the double cavity portion may be made of stainless steel or a medical polymer material.
  • the outer tube is relatively large in diameter, and parts such as a net basket are also provided inside, so the flexibility is relatively poor, and there are bends When the outer tube is pushed, it is easy to deviate from the predetermined line movement.
  • a distal end of the outer tube is provided with a dual cavity end cap, and the dual cavity end cap is close to the inner wall of the outer tube.
  • the guide wire can be pushed to a predetermined position using an incision knife.
  • the guide wire can be passed through the guide wire cavity in advance, the guide wire can be fixed, and the outer tube can be pushed to move the outer tube along the guide wire so that the outer tube can move according to a predetermined line.
  • FIG. 1 is a general schematic diagram of a stone basket
  • 2A is a cross-sectional view of a dual-cavity end cap
  • 2B is a schematic structural diagram of a dual-cavity end cap
  • FIG. 3 is a schematic diagram of a head end connecting piece of a dual cavity end cap
  • 4A is a schematic diagram of determining a stone position in a biliary tract with a stone basket
  • FIG. 4B is a schematic diagram when the stone basket is tightened
  • 4C is a schematic diagram when taking a stone from a stone basket
  • 1-net basket 2-outer tube; 3-sheathing tube; 4-guide wire; 5-double-lumen end cap; 6-lumen channel A; 7-lumen channel B; 8-connection portion; 9-double cavity portion 10-operation part 11-handle 12-mandrel 13-luer joint 14-connector 15-calculus 16-endoscope 17-biliary tract 18-duodenal papilla 19- Spiral barb structure; 20-protruding structure; 21-groove structure.
  • the end near the operator is defined as the proximal end
  • the end remote from the operator is defined as the far end.
  • FIG. 1 it is a general schematic diagram of a stone-taking net basket.
  • the stone-taking net basket of the present application includes a network basket 1, an outer tube 2, an operation unit 10, and the network basket 1 is connected to the operation unit, so that the operation unit 10 can operate the network basket.
  • the proximal end of the outer tube 2 is connected to the operation part, and extends axially from the proximal end to the distal end along the stone taking basket.
  • the operation part 10 includes a handle 11, a core rod 12, and the core rod 12 extends axially from the proximal end to the distal end along the stone extraction basket.
  • the handle 11 is located at the proximal end of the stone extraction basket and is provided on the core rod 12, and the handle 11 extends along the core.
  • the rod 12 can slide back and forth to make the net basket 1 extend or retract.
  • the proximal end of the outer tube 2 is provided with a protective sleeve 3, and the proximal end of the protective sleeve 3 is connected to the core rod 12 through a connecting member 14.
  • the distal end of the outer tube 2 of the stone extraction basket of the present application is provided with a double-cavity end cap 5.
  • the dual-cavity end cap 5 includes a connection portion 8 and a dual-cavity portion 9, and the guide wire 4 passes through one of the channels of the dual-cavity end cap 5, namely, the channel B7, and the net basket 1 passes through the double
  • the other cavity of the cavity end cap 5 is cavity A6.
  • the two channels of the double-cavity end cap are hollow structures, and the hollow structure and the outer tube 2 together form a channel in which the net basket 1 extends and retracts.
  • one end of the connecting portion 8 is connected to the double cavity portion 9 and the other end is connected to the outer tube 2.
  • the end of the connecting portion 8 connected to the outer tube 2 has a spiral barbed structure 19 on the outer surface;
  • the outer surface of the connecting portion 8 has a protruding structure 20, and the protruding structure 20 may also have a groove structure 21 around it.
  • the protruding structure 20 and the groove structure 21 make the connecting portion 8 and the double cavity portion 9 more Good connection.
  • the connecting manner of the connecting portion 8 and the double-cavity portion 9 may be plastic molding, sticking, hot sleeve, or other methods.
  • the protruding structure 20 may be a stop structure such as a four corner, a hexagon or an octagon.
  • a double-cavity end cap is provided at the distal end of the stone extraction net basket of the present application to implement the guide wire function, enhance the strength of the guide wire cavity, avoid deformation or rupture of the guide wire cavity, and avoid interference with the guide wire after the net basket is opened. .
  • the stone net basket has a double-cavity end cap 5, and the guide wire 4 is passed through the channel B7 of the double-cavity end cap 5, and the net basket 1 is placed on Channel A6 of the double-lumen end cap 5. Insert the entire instrument along the guide wire 4 into the endoscope channel, push the outer tube 2 of the stone basket to the duodenal papilla 18, observe the duodenal papilla 18 under the endoscope 16, and take the outside of the stone net basket The distal end of the tube 2 is inserted into the biliary tract 17 through the duodenal papilla 18.
  • the distal end surface of the dual-cavity end cap 5 has a guide bevel structure on the side of the lumen through which the guide wire 4 passes.
  • the stone basket needs to be taken after passing through the duodenum, so that the double-cavity end cap 5 may contact the inner wall of the patient's bile duct or duodenum and other organs, so
  • a guiding bevel at the distal end surface of the double-lumen portion 9 of the double-lumen end cap 5, the tissue can be dredged, the inner wall of the tissue can be prevented from hindering the movement of the stone basket, and the tissue can be prevented from being scratched by the end surface of the double-lumen end cap 5.
  • the thickness of the outer contour of the cavity passing through the mesh basket in the dual-cavity end cap is greater than the thickness of the outer contour of the cavity passing through the guide wire.
  • the endoscope instrument generally inserts the size of the part of the instrument into the human body expressed in French, that is, the circumference of the cross section of the instrument insertion portion. Since the natural cavity of the human body is irregularly peristaltic, when a device with a special cross-sectional area is inserted into the natural cavity of the human body, the smaller the perimeter of the cross section, the better the insertability. The insertability of a device is a very important indicator for evaluating the performance of a device.
  • the thickness of the outer contour of the channel passing through the net basket in the double-lumen end cap is larger than that of the outer contour of the guide wire, which can reduce the size of the cross section of the catheter as much as possible to achieve better insertion performance and improve the stone extraction net Efficiency of basket insertion into duodenal nipples.

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Abstract

一种取石网篮，包括网篮(1)，外管(2)，操作部(10)，网篮(1)与操作部(10)相连接，操作部(10)可以控制网篮(1)移动。外管(2)的近端与操作部(10)相连接，且从近端向远端轴向延伸，外管(2)的远端设有双腔端帽(5)，导丝(4)通过双腔端帽(5)的一个腔道(B7)，网篮(1)通过双腔端帽(5)的另一个腔道(A6)。该取石网篮解决了导丝被网篮远端端帽带动而妨碍网篮套取结石和撤出胆道的现有技术问题。

Description

一种取石网篮及用于取石网篮的双腔端帽
本申请要求在2018年9月11日提交中国专利局、申请号为201821481534.0、名称为“一种取石网篮”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及一种取石网篮以及用于取石网篮的双腔端帽。
背景技术
ERCP手术(ERCP，Endoscopic Retrograde Cholangio pancreatography)，即经内镜逆行性胰胆管造影术是指将十二指肠镜插至十二指肠降部，找到十二指肠乳头，由活检管道内插入造影导管至乳头开口部，注入造影剂后X线摄片，以显示胰胆管的技术。由于ERCP不用开刀，创伤小，手术时间短，并发症较外科手术少，住院时间也大大缩短，深受患者欢迎。取石网篮作为ERCP配件中常用的取石工具，可以取出胆道内的结石。取石网篮分为有导丝引导网篮、无导丝引导网篮和取碎一体取石网篮，根据网篮形状可以分为“六边形”、“钻石型”和“螺旋形”。
传统的ERCP手术中器械的交换通过预留在人体内的长导丝(4.5m)进行，需要医生和护士配合进行，对医生和护士操作的配合的熟练程度有较高要求，而且手术耗时交长，为了节省手术时间并实现医生单人操作，ERCP手术发展出了可配合短导丝(2.6m)实现ERCP器械间快速交换的一套手术器械。目前常规的取石网篮因无导丝腔或导丝腔道过长，无法与短导丝ERCP手术实现快速交换。与短导丝配合使用的取石网篮技术处于发展阶段，目前存在导丝腔道入口受力拉伸变形，导丝插入困难，以及导丝被网篮远端端帽带动而妨碍网篮套取结石和撤出胆道等问题。
发明内容
本申请提供一种取石网篮，包括网篮，外管，操作部，所述网篮与操作部相连接，所述操作部可以控制网篮移动；所述外管近端与操作部相连接，且从近端向远端轴向延伸，所述外管远端设有双腔端帽，导丝可通过所述双腔端帽的一个腔道，所述网篮可通过所述双腔端帽的另一个腔道。
可选的，所述操作部包括手柄和芯杆，所述手柄沿所述芯杆前后滑动可以使所述网篮伸出或收起。
可选的，所述双腔端帽包括连接部和双腔部。
可选的，所述双腔端帽的腔道是空心结构，所述空心结构与外管共同形成网篮伸出和收起的腔道。
可选的，所述连接部一端的外表面具有螺旋倒刺结构，用于与所述外管连接，连接部的另一端外表面具有突出结构，与所述双腔部连接。
可选的，所述突出结构周围具有凹槽结构。
可选的，所述突出结构为四角，六角或八角止动结构。
可选的，所述连接部和双腔部的连接方式为包塑，粘黏，热套。
可选的，所述双腔端帽的远端端面，在导丝通过的腔道一侧，具有导向斜角结构。
可选的，所述双腔端帽中通过网篮的腔道外轮廓厚度大于，通过导丝的腔道外轮廓厚度。
本申请还提供一种用于取石网篮的双腔端帽，所述双腔端帽包括连接部和双腔部，所述双腔部包括两个腔道，导丝通过所述双腔部的一个腔道，网篮通过所述双腔部的另一个腔道。
可选的，所述连接部一端的外表面具有螺旋倒刺结构，所述连接部的另一端的外表面具有突出结构。
可选的，所述突出结构周围具有凹槽结构。
可选的，所述双腔部的远端端面，在导丝通过的腔道一侧，具有导向斜角结构。
可选的，所述双腔部中通过网篮的腔道外轮廓厚度大于，通过导丝的腔道外轮廓厚度。
连接部和双腔部可以是由不锈钢、医用高分子材料制成。
由于人体胆道等器官并不是规则形状的管状结构，因此，在使用的过程中，由于外管直径相对较大，且内部还设置有网篮等部件，因此灵活度相对较差，在有弯曲处推送外管时很容易偏离预定线路运动，本申请的取石网篮，外管远端设置有双腔端帽，双腔端帽贴近外管内壁。使用时，可以使用切开刀将导丝推送到预定位置。需要使用取石网篮进行取石时，可以预先在导丝腔穿过导丝，固定导丝，推送外管，使外管沿着导丝运动，使得外管能够按照预定线路运动。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是取石网篮的总体示意图；
图2A是双腔端帽的剖视图；
图2B是双腔端帽的结构示意图；
图3是双腔端帽的头端连接件示意图；
图4A是取石网篮在胆道内确定结石位置示意图；
图4B是取石网篮收紧时的示意图；
图4C是取石网篮取石时的示意图；
图示说明：
1-网篮；2-外管；3-护套管；4-导丝；5-双腔端帽；6-腔道A；7-腔道B；8-连接部；9-双腔部；10-操作部；11-手柄；12-芯杆；13-鲁尔接头；14-连接件；15-结石；16-内窥镜；17-胆道；18-十二指肠乳头；19-螺旋倒刺结构；20-突出结构；21-凹槽结构。
具体实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
以下，将靠近操作者的一端定义为近端，将远离操作者的一端定义为远端。
如图1所示，是取石网篮的总体示意图，本申请的取石网篮包括网篮1，外管2，操作部10，网篮1与操作部相连接，从而操作部10可以操纵网篮移动，外管2近端与操作部连接，并沿着取石网篮从近端向远端轴向延伸。操作部10包括手柄11，芯杆12，芯杆12沿着取石网篮从近端向远端轴向延伸，手柄11位于取石网篮近端，设于芯杆12上，且手柄11沿芯杆12前后滑动可以使网篮1伸出或收起。外管2的近端设有护套管3，护套管3近端通过连接件14与芯杆12相连。本申请的取石网篮的外管2远端设有双腔端帽5。
如图1、2A-2B所示，双腔端帽5包括连接部8和双腔部9，导丝4通过双腔端帽5的其中一个腔道，即腔道B7，网篮1通过双腔端帽5的另一个腔道，即腔道A6。双腔端帽的两个腔道是空心结构，空心结构与外管2共同形成网篮1伸出和收起的腔道。
如图3所示，连接部8一端与双腔部9相连，另一端与外管2相连，连接部8与外管2相连的一端，其外表面具有螺旋倒刺结构19；连接部8与双腔部9相连的一端，连接部8的外表面具有突出结构20，突出结构20周围还可具有凹槽结构21，突出结构20以及凹槽结构21使得连接部8与双腔部9可以更好的连接。连接部8和双腔部9的连接方式可以为包塑，粘黏，热套，或其它方式。突出结构20可以是四角，六角或八角等止动结构。本申请的取石网篮远端设有双腔端帽实现过导丝功能，增强导丝腔道的强度，避免出现过导丝腔道变形或破裂，且避免网篮打开后与导丝的干涉。
如图1、2B、4A-4C所示，在实际使用过程中，取石网篮上具有双腔端帽5，将导丝4穿过双腔端帽5的腔道B7，网篮1放置于双腔端帽5的腔道A6。将整个器械沿导丝4插入内窥镜通道，将取石网篮的外管2推至十二指肠乳头18，在内窥镜16下观察十二指肠乳头18，将取石网篮的外管2远端通过十二指肠乳头18插入胆道17。使用注射器从取石网篮的鲁尔接头13注射造影剂，帮助确定网篮1与结石15的位置。把取石网篮的外管2向远端推进，越过想要捕获的结石15。通过向远端推动操作部10的手柄11，慢慢打开网篮1，通过拉动网篮1圈套结石15，网篮1套住结石15后，通过回撤拉动操作部10的手柄11，使结石15收紧固定在取石网篮的外管2远端端面。向近端回撤手柄11，撤回网篮1，直至结石15被拉出胆道17。如果有多颗结石，重复上述操作，直至所有的结石被取出为止。
在本申请的部分实施例中，双腔端帽5的远端端面，在导丝4通过的腔道一侧，具有导向斜角结构。通过在双腔端帽5的双腔部9远端端面增加导向斜角，可以提高取石网篮在十二指肠镜里的通过性能。即可以避免双腔端帽5与十二指肠镜远端出口位置的抬钳器干涉，当导管远端的头端帽经过抬钳器时，在斜角的导向作用下，导管会顺利滑过抬钳器。实际使用中，如果没有导向斜角结构，那么双腔端帽5通过导丝的腔道端面会最先接触到抬钳器，形成卡顿。
另外，由于在实际应用中，取石网篮要在通过十二指肠镜后，实施取物操作，使得双腔端帽5有可能接触到患者胆道或十二指肠等器官的组织内壁，因此，在双腔端帽5的双腔部9远端端面增加导向斜角，可以疏通组织，避免组织内壁阻碍取石网篮的动作，以及避免组织被双腔端帽5的端面划伤。
在本申请的部分实施例中，所述双腔端帽中通过网篮的腔道外轮廓厚度大于，通过导丝的腔道外轮廓厚度。在实际使用中，内窥镜器械一般都会将器械插入人体部分尺寸用 french表示，即器械插入部截面的周长。由于人体的自然腔道是不规则蠕动的，所以截面积为异形的器械插入人体自然腔道时，截面的周长越小，插入性越好。器械的可插入性能是评价一个器械性能的非常重要的指标。很多时候，人体中一些极小的孔道，例如乳头开口，需要器械能有更小的french，有更好的插入性，才能方便插入，并进行后续的手术操作。因此，所述双腔端帽中通过网篮的腔道外轮廓厚度大于，通过导丝的腔道外轮廓厚度的结构，可以尽可能减小导管截面的尺寸，达到更好的插入性能，提高取石网篮插入十二指肠乳头的效率。
上所述仅是本申请的优选实施方式，使本领域技术人员能够理解或实现本申请。对于这些实施例的多种修改及组合对于本领域的技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其他实施例中实现。因此，本申请将不会被限制在本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (15)

  1. 一种取石网篮，包括网篮，外管，操作部，所述网篮与操作部相连接，所述操作部可以控制网篮移动；所述外管近端与操作部相连接，且从近端向远端轴向延伸，所述外管远端设有双腔端帽，导丝可通过所述双腔端帽的一个腔道，所述网篮可通过所述双腔端帽的另一个腔道。
  2. 根据权利要求1所述的取石网篮，其中，所述操作部包括手柄和芯杆，所述手柄沿所述芯杆前后滑动可以使所述网篮伸出或收起。
  3. 根据权利要求1所述的取石网篮，其中，所述双腔端帽包括连接部和双腔部。
  4. 根据权利要求1所述的取石网篮，其中，所述双腔端帽的腔道是空心结构，所述空心结构与外管共同形成网篮伸出和收起的腔道。
  5. 根据权利要求3所述的取石网篮，其中，所述连接部一端的外表面具有螺旋倒刺结构，用于与所述外管连接，连接部的另一端外表面具有突出结构，与所述双腔部连接。
  6. 根据权利要求5所述的取石网篮，其中，所述突出结构周围具有凹槽结构。
  7. 根据权利要求5所述的取石网篮，其中，所述突出结构为四角，六角或八角止动结构。
  8. 根据权利要求3所述的取石网篮，其中，所述连接部和双腔部的连接方式为包塑，粘黏，热套。
  9. 根据权利要求1所述的取石网篮，其中，所述双腔端帽的远端端面，在导丝通过的腔道一侧，具有导向斜角结构。
  10. 根据权利要求1所述的取石网篮，其中，所述双腔端帽中通过网篮的腔道外轮廓厚度大于，通过导丝的腔道外轮廓厚度。
  11. 一种用于取石网篮的双腔端帽，其中，所述双腔端帽包括连接部和双腔部，所述双腔部包括两个腔道，导丝通过所述双腔部的一个腔道，网篮通过所述双腔部的另一个腔道。
  12. 根据权利要求11所述的双腔端帽，其中，所述连接部一端的外表面具有螺旋倒刺结构，所述连接部的另一端的外表面具有突出结构。
  13. 根据权利要求12所述的双腔端帽，其中，所述突出结构周围具有凹槽结构。
  14. 根据权利要求11所述的双腔端帽，其中，所述双腔部的远端端面，在导丝通过的腔道一侧，具有导向斜角结构。
  15. 根据权利要求11所述的双腔端帽，其中，所述双腔部中通过网篮的腔道外轮廓厚度大于，通过导丝的腔道外轮廓厚度。
PCT/CN2019/104414 2018-09-11 2019-09-04 一种取石网篮及用于取石网篮的双腔端帽 WO2020052484A1 (zh)

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