WO2020135726A1 - 一种防转动活检针 - Google Patents

一种防转动活检针 Download PDF

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Publication number
WO2020135726A1
WO2020135726A1 PCT/CN2019/129242 CN2019129242W WO2020135726A1 WO 2020135726 A1 WO2020135726 A1 WO 2020135726A1 CN 2019129242 W CN2019129242 W CN 2019129242W WO 2020135726 A1 WO2020135726 A1 WO 2020135726A1
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Prior art keywords
needle
limit
handle
buckle
needle bar
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PCT/CN2019/129242
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English (en)
French (fr)
Inventor
李养晶
张健华
Original Assignee
南京畅丰生物科技有限公司
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Priority to EP19905536.9A priority Critical patent/EP3903686B1/en
Publication of WO2020135726A1 publication Critical patent/WO2020135726A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/025—Pointed or sharp biopsy instruments for taking bone, bone marrow or cartilage samples
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/02—Instruments for taking cell samples or for biopsy
    • A61B10/0233—Pointed or sharp biopsy instruments
    • A61B10/025—Pointed or sharp biopsy instruments for taking bone, bone marrow or cartilage samples
    • A61B2010/0258—Marrow samples
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/033—Abutting means, stops, e.g. abutting on tissue or skin
    • A61B2090/034—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03—Automatic limiting or abutting means, e.g. for safety
    • A61B2090/033—Abutting means, stops, e.g. abutting on tissue or skin
    • A61B2090/034—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself
    • A61B2090/035—Abutting means, stops, e.g. abutting on tissue or skin abutting on parts of the device itself preventing further rotation

Definitions

  • the invention relates to a biopsy needle, in particular to an anti-rotation biopsy needle, which belongs to the technical field of medical instruments.
  • the biopsy needle is a more commonly used medical device. It can accurately locate the lesion with a small wound and quickly complete the sampling, reducing the pain of the patient during the operation.
  • the assembled biopsy needle When using a biopsy needle, first of all, the assembled biopsy needle needs to pass through the skin tissue to reach the sampling site and be inserted, rotate the needle bar assembly to remove the needle bar, connect the syringe through the Luer interface, and suck out the test sample through the syringe.
  • the sampling site of some biopsy needles is bone marrow.
  • a large force is required to insert the biopsy needle into the sampling site for sampling.
  • the operator will drill the bone marrow by repeatedly rotating the biopsy needle.
  • the needle bar handle may rotate due to friction with the palm of the hand, causing the needle bar blade surface to be misaligned with the needle tube blade surface, reducing the puncture strength of the biopsy needle, and possibly causing the needle tube to curl. It may even be damaged, causing the risk of surgery.
  • the present invention provides an anti-rotation biopsy needle, which adopts a design of a limiting device and an unlocking device to ensure that the needle bar does not rotate during the puncture process and needs to be removed
  • the needle bar assembly can be easily removed.
  • an anti-rotation biopsy needle of the present invention includes a needle tube assembly and a needle bar assembly
  • the needle tube assembly includes a needle tube 5 and a needle tube handle 1
  • the needle bar assembly includes a needle bar 6 and a needle bar handle 2
  • the tail of the needle tube 5 is connected with a needle handle 1
  • the top of the needle tube handle 1 is provided with a luer interface 103
  • the needle bar 6 passes through the needle tube handle 1 and the needle tube 5 from the luer interface 103
  • the needle bar 6 has a needle bar handle 2
  • a needle tube handle 1 is provided with a first limit device
  • the first limit device includes a rotary buckle 101 and a limit buckle 102 located on both sides of the Luer interface 103
  • the support portion 101-1 of the rotary buckle 101 is supported by a On the side, the support portion 101-1 extends upward from a hook portion 101-2 provided at a right angle to it.
  • the needle bar handle 2 is provided with a second limit device.
  • the second limit device includes a rotation groove 201 that cooperates with the rotating buckle 101.
  • the rotation groove 201 is used for the hook portion 101-2 to be screwed in and locked to restrict the needle bar handle.
  • the second limit device also includes a guide slot 202 that cooperates with the limit buckle 102, the end of the guide slot with a smaller diameter is connected to the limit slot 203, and the guide slot 202 is a section of a linearly reduced diameter notch.
  • the buckle 101 is inserted into the larger diameter end of the guide groove 202.
  • the limit buckle 101 slides along the guide groove 202 to the smaller diameter end into the limiting groove 203.
  • the limit buckle 102 Due to the diameter of the guide groove Keeping getting smaller, the limit buckle 102 will produce radial elastic deformation. When the limit buckle 102 rotates to the end of the guide slot 202, the limit buckle 102 springs back to the original state and enters the limit slot 203. At this time, the axial rotation of the needle bar handle 2 is restricted.
  • the needle bar handle 2 is also provided with an unlocking device.
  • the unlocking device includes an unlocking button 301 located on the side of the limit buckle 102. In the locked state, the limit buckle 102 is located in the limit slot. When unlocking is required, The unlocking button 301 is inclined toward the limit buckle 102, and the limit buckle is deformed, so that the limit buckle and the limit groove are misaligned. At this time, the limit function of the limit buckle disappears, and the needle bar handle can be turned.
  • the needle bar assembly further includes a needle bar handle cover 3, and a series of grooves are provided in the circumferential direction of the needle bar handle cover 3, which can play an anti-slip effect.
  • the needle tube 5 has a hollow structure, and the end of the needle tube has a puncture needle 501 with a slope.
  • the needle bar 6 has a solid core structure, and its end portion coincides with the inclined puncture needle 501, and forms a puncture blade when the biopsy needle enters the biopsy site.
  • the needle tube 5 is connected to the needle tube handle 1 through the adjustment handle 4.
  • the operator can rotate the nut on the adjustment handle 4 according to the needs of different puncture depths, so that the adjustment handle moves forward and backward, and the exposed length of the needle tube 5 is adjusted.
  • the operation is simple and convenient.
  • the anti-rotation structure of the biopsy needle handle of the present invention is simple in structure, and only some simple changes need to be made on the original biopsy needle structure, and the cost of the change is low; (2) The present invention can effectively prevent the operation process The rotation caused by accidentally touching the handle ensures the effectiveness of the instrument and reduces the risk of surgery; (3) The unlocking device in the present invention is easy to operate and the user experience is better.
  • FIG. 1 is a schematic structural diagram of an embodiment of the present invention.
  • FIG. 2 is a schematic view of the structure of a needle bar handle in an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the structure of the needle tube handle in the embodiment of the present invention.
  • FIG. 4a is a schematic diagram of the rotation buckle and the limit buckle in the initial stage in the embodiment of the present invention.
  • FIG. 4b is a schematic diagram of the rotation buckle and the limit buckle in the rotation stage in the embodiment of the present invention.
  • FIG. 4c is a schematic diagram of the rotating buckle and the limit buckle in the engaging stage in the embodiment of the present invention.
  • FIG. 5a is another schematic diagram of the rotating buckle in the initial stage in the embodiment of the present invention.
  • FIG. 5b is another schematic diagram of the rotating buckle at the completion stage in the embodiment of the present invention.
  • FIG. 6a is a schematic diagram of a limit buckle in a locked state according to an embodiment of the present invention.
  • FIG. 6b is a schematic diagram of the limit buckle in an unlocked state according to an embodiment of the present invention.
  • 6c is another schematic diagram of the limit buckle in the locked state in the embodiment of the present invention.
  • FIG. 6d is another schematic diagram of the limit buckle in the unlocked state in the embodiment of the present invention.
  • the invention provides an anti-rotation biopsy needle, which includes a needle tube assembly and a needle bar assembly.
  • the needle tube assembly includes a needle tube 5 and a needle tube handle 1.
  • the needle bar assembly includes a needle bar 6 and a needle bar handle 2.
  • a needle tube handle 1 is connected to the tail of the needle tube 5 ,
  • the needle tube handle 1 is provided with a Luer interface 103 on the top, the needle bar 6 is passed through the needle tube handle 1 and the needle tube 5 by the Luer interface 103, the needle bar 6 has a needle bar handle 2 at the tail, and the needle tube handle 1 is provided with a first limit device
  • the first limiting device includes a rotating buckle 101 and a limiting buckle 102 on both sides of the Luer interface 103.
  • the supporting portion 101-1 of the rotating buckle 101 is supported on one side of the Luer interface 103, and the supporting portion 101-1 extends upward
  • the hook portion 101-2 is provided at a right angle to it.
  • the hook portion 101-2 is screwed in and locked to restrict the axial movement of the needle bar handle;
  • the second limiting device further includes a guide groove 202 that cooperates with the limit buckle 102, and the end of the guide groove with a smaller diameter is connected to the limited groove 203.
  • the guide groove 202 is a notch whose diameter decreases linearly.
  • the limit buckle 101 is inserted into the larger diameter end of the guide groove 202 at the initial stage. As the needle bar handle is rotated, the limit buckle 101 slides along the guide groove 202 toward The end with the smaller diameter enters the limiting groove 203. Since the diameter of the guide groove becomes smaller and smaller, the limiting buckle 102 will produce radial elastic deformation. When the limit buckle 102 rotates to the end of the guide slot 202, the limit buckle 102 springs back to the original state and enters the limit slot 203. At this time, the axial rotation of the needle bar handle 2 is restricted.
  • the needle bar handle is also provided with an unlocking device.
  • the unlocking device includes an unlocking button 301 on the side of the limit buckle 102. In the locked state, the limit buckle 102 is located in the limit slot. When unlocking is required, the unlocking button 301 Inclined toward the limit buckle 102, the limit buckle is deformed, so that the limit buckle and the limit groove are misaligned. At this time, the limit function of the limit buckle disappears, and the needle bar handle can be turned.
  • the needle bar assembly further includes a needle bar handle cover 3, and a series of grooves are provided in the circumferential direction of the needle bar handle cover 3, which can play an anti-slip effect.
  • the needle tube 5 has a hollow structure, the end of which has a slanted puncture needle 501, and the needle shaft 6 has a solid core structure. Its end coincides with the slanted puncture needle 501, and forms a puncture blade when the biopsy needle enters the biopsy site.
  • the needle tube 5 is connected to the needle tube handle 1 through the adjustment handle 4.
  • the operator passes the assembled biopsy needle through the skin tissue to reach the sampling site.
  • the biopsy needle is vigorously rotated to drill into the sampling site, and the needle bar assembly will not rotate and loose due to the rotation of the hand Off.
  • the unlock button with your thumb and turn the needle bar handle cover, then the needle bar assembly can be removed.
  • the invention has good user experience, basically does not change the original user operation habits, and the difficulty of getting started is low; and can prevent the rotation of the needle rod during the biopsy needle puncture process, reduce the risk of surgery, and make the use of the instrument more reliable.

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Abstract

一种防转动活检针，包括针管组件和针杆组件，针管组件包括针管（5）和针管手柄（1），针杆组件包括针杆（6）和针杆手柄（2），针管（5）的尾部连接有针管手柄（1），针管手柄（1）的顶部连接有针杆（6），针杆（6）的尾部连接有针杆手柄（2），针管手柄（1）上设置有第一限位装置，针杆手柄（2）上设置有第二限位装置，第一限位装置和第二限位装置相配合使用。活检针手柄防转结构只需在原有活检针结构上做一些简单的改动，结构简单，改动成本较低；可以有效的防止手术过程中因误触手柄产生的转动，保证器械的有效性，降低了手术风险。

Description

一种防转动活检针 技术领域
本发明涉及一种活检针，尤其涉及一种防转动活检针，属于医疗器械技术领域。
背景技术
在临床诊断中，活检针是一种较为常用的医疗器械，它可以以较小的创口精准的定位病灶，快速完成取样，减轻了病人手术过程中的痛苦。
使用活检针时，首先需使组装好的活检针穿过皮肤组织达到取样部位并插入，旋转针杆组件来移除针杆，通过鲁尔接口连接注射器，通过注射器将检测样本吸出。
部分活检针的取样部位为骨髓，此时需要用较大的力才能将活检针插入取样部位进行取样，通常手术人员会通过反复用力旋转活检针的方式来钻入骨髓中。在这种情况下，针杆手柄有可能会因为和手掌之间的摩擦而产生转动，导致针杆刃面与针管刃面错位，降低了活检针的穿刺强度，有可能会使针管产生卷刃甚至损坏，造成手术风险的发生。
发明内容
发明目的：为了克服现有技术中存在的不足，本发明提供一种防转动活检针，采用限位装置和解锁装置的设计，能够保证活检针在穿刺过程针杆不发生转动，且在需要取出针杆组件时可以很便捷的取下。
技术方案：为解决上述技术问题，本发明的一种防转动活检针，包括针管组件和针杆组件，针管组件包括针管5和针管手柄1，针杆组件包括针杆6和针杆手柄2，针管5的尾部连接有针管手柄1，针管手柄1的顶部设有鲁尔接口103，针杆6由鲁尔接口103贯穿针管手柄1和针管5，针杆6尾部有针杆手柄2，针管手柄1上设置有第一限位装置，第一限位装置包括位于鲁尔接口103两侧的旋转扣101和限位扣102，旋转扣101的支撑部 101-1支撑于鲁尔接口103的一侧，支撑部101-1向上延伸出与其呈直角设置的钩部101-2。
针杆手柄2上设置有第二限位装置，第二限位装置包括与旋转扣101相配合的旋转槽201，旋转槽201供钩部101-2旋进并锁紧，限制针杆手柄的轴向移动；第二限位装置还包括与限位扣102相配合的导向槽202，导向槽直径较小的一端连接有限位槽203，导向槽202为一段直径线性减小的槽口，限位扣101在初始阶段插入导向槽202直径较大的一端，随着旋转针杆手柄，限位扣101沿着导向槽202滑向直径较小的一端进入限位槽203，由于导向槽的直径不断变小，限位扣102将会产生径向的弹性变形。当限位扣102转至导向槽202末端时，限位扣102弹回原状并进入限位槽203。此时，针杆手柄2的轴向转动被限制。
进一步地，针杆手柄2上还设置有解锁装置，解锁装置包括位于限位扣102一侧的解锁按钮301，在锁紧状态时，限位扣102位于限位槽内，当需要解锁时，解锁按钮301朝限位扣102方向倾斜，限位扣产生形变，从而限位扣与限位槽产生错位，此时限位扣的限位作用消失，即可转动针杆手柄。
进一步地，针杆组件还包括针杆手柄盖3，针杆手柄盖3的周向设置有一组凹槽，可以起到防滑作用。
进一步地，针管5为中空结构，其端部具有斜面穿刺针头501。
进一步地，针杆6为实芯结构，其端部与斜面穿刺针头501重合，在活检针进入活检部位时，形成穿刺刃。
进一步地，针管5贯穿调节手柄4与针管手柄1连接。手术人员可根据不同穿刺深度的需求，旋转调节手柄4上的螺母，从而使调节手柄前后移动，调节针管5的外露长度，操作简单、方便。
有益效果：(1)本发明活检针手柄防转结构，结构简单，只需在原有活 检针结构上做一些简单的改动，改动成本较低；(2)本发明可有效的防止手术过程中因误触手柄产生的转动，保证器械的有效性，降低了手术风险；(3)本发明中的解锁装置易于上手操作，用户体验较好。
附图说明
图1为本发明实施例的结构示意图。
图2为本发明实施例中针杆手柄结构示意图。
图3为本发明实施例中针管手柄结构示意图。
图4a为本发明实施例中旋转扣和限位扣在初始阶段的示意图。
图4b为本发明实施例中旋转扣和限位扣在旋转阶段的示意图。
图4c为本发明实施例中旋转扣和限位扣在啮合阶段的示意图。
图5a为本发明实施例中旋转扣在初始阶段的另一示意图。
图5b为本发明实施例中旋转扣在完成阶段的另一示意图。
图6a为本发明实施例中限位扣在锁定状态时的示意图。
图6b为本发明实施例中限位扣在解锁状态时的示意图。
图6c为本发明实施例中限位扣在锁定状态时的另一示意图。
图6d为本发明实施例中限位扣在解锁状态时的另一示意图。
具体实施方式
下面结合附图对本发明作更进一步的说明。
实施例
本发明提供一种防转动活检针，包括针管组件和针杆组件，针管组件包括针管5和针管手柄1，针杆组件包括针杆6和针杆手柄2，针管5的尾部连接有针管手柄1，针管手柄1的顶部设有鲁尔接口103，针杆6由鲁尔接口103贯穿针管手柄1和针管5，针杆6尾部有针杆手柄2，针管手柄1上设置有第一限位装置，第一限位装置包括位于鲁尔接口103两侧的旋转扣101和限位扣102，旋转扣101的支撑部101-1支撑于鲁尔接口103的一 侧，支撑部101-1向上延伸出与其呈直角设置的钩部101-2。
钩部101-2旋进并锁紧，限制针杆手柄的轴向移动；第二限位装置还包括与限位扣102相配合的导向槽202，导向槽直径较小的一端连接有限位槽203，导向槽202为一段直径线性减小的槽口，限位扣101在初始阶段插入导向槽202直径较大的一端，随着旋转针杆手柄，限位扣101沿着导向槽202滑向直径较小的一端进入限位槽203，由于导向槽的直径不断变小，限位扣102将会产生径向的弹性变形。当限位扣102转至导向槽202末端时，限位扣102弹回原状并进入限位槽203。此时，针杆手柄2的轴向转动被限制。
针杆手柄上还设置有解锁装置，解锁装置包括位于限位扣102一侧的解锁按钮301，在锁紧状态时，限位扣102位于限位槽内内，当需要解锁时，解锁按钮301朝限位扣102方向倾斜，限位扣产生形变，从而限位扣与限位槽产生错位，此时限位扣的限位作用消失，即可转动针杆手柄。
针杆组件还包括针杆手柄盖3，针杆手柄盖3的周向设置有一组凹槽，可以起到防滑作用。针管5为中空结构，其端部具有斜面穿刺针头501，针杆6为实芯结构，其端部与斜面穿刺针头501重合，在活检针进入活检部位时，形成穿刺刃。针管5贯穿调节手柄4与针管手柄1连接。
本发明在使用时，手术人员将组装好的活检针穿过皮肤组织到达取样部位，此时用力旋转活检针钻入取样部位，针杆组件并不会因为手部的旋转动作而产生转动并松脱。待活检针完全插入取样部位后，拇指按下解锁按钮后转动针杆手柄盖，此时即可取下针杆组件。本发明用户体验好，基本不改变原有的用户操作习惯，上手难度较低；并且可以防止活检针在穿刺过程中针杆转动的产生，降低了手术的风险，使得器械的使用更加可靠。
以上显示和描述了本发明的基本原理、主要特征和优点。本行业的技术人员应该了解，上述实施例不以任何形式限制本发明，凡采用等同替换 或等效变换的方式所获得的技术方案，均落在本发明的保护范围内。

Claims (13)

  1. 一种防转动活检针，包括针管组件和针杆组件，所述针管组件包括针管(5)和针管手柄(1)，所述针杆组件包括针杆(6)和针杆手柄(2)，所述针管的尾部连接有针管手柄(1)，针杆(6)的尾部连接针杆手柄(2)，其特征在于：
    所述针管手柄(1)上设置有第一限位装置，所述第一限位装置包括限位扣(102)；
    所述针杆手柄(2)上设置有第二限位装置，所述第二限位装置包括与限位扣(102)相配合的导向槽(202)，所述导向槽直径较小的一端为限位槽(203)，所述限位扣(102)在初始阶段插入导向槽(202)直径较大的一端，随着旋转针杆手柄(2)，限位扣(102)的外侧面沿着贴合导向槽(202)内侧面转动并受力向内侧变形，当限位扣(102)完全进入限位槽(203)时恢复形变，进而啮合，以限制针杆手柄(2)的轴向转动。
  2. 根据权利要求2所述的一种防转动活检针，其特征在于：所述导向槽(202)为一段直径线性减小的槽口。
  3. 根据权利要求1所述的一种防转动活检针，其特征在于：所述第一限位装置还包括旋转扣(101)，所述旋转扣(101)的支撑部(101-1)连接针管手柄(1)，所述支撑部(101-1)向上延伸出钩部(101-2)；
    所述第二限位装置还包括与旋转扣(101)相配合的旋转槽(201)，所述旋转槽(201)供钩部(101-2)旋进并锁紧，限制针杆手柄的轴向移动。
  4. 根据权利要求3所述的一种防转动活检针，其特征在于：所述支撑部(101-1)向上延伸出与其呈直角设置的钩部(101-2)。
  5. 根据权利要求3所述的一种防转动活检针，其特征在于：所述针管手柄(1)的顶部设有鲁尔接口(103)，所述针杆(6)由鲁尔接口(103)贯穿针管手柄(1)和针管(5)。
  6. 根据权利要求5所述的一种防转动活检针，其特征在于：所述限位 扣(102)与旋转扣(101)位于鲁尔接口(103)的两侧。
  7. 根据权利要求1所述的一种防转动活检针，其特征在于：还包括解锁装置，所述解锁装置包括位于限位扣(102)外侧的解锁按钮(301)，在锁紧状态时，所述限位扣(102)位于限位槽(203)内，当需要解锁时，解锁按钮(301)朝限位扣(102)方向倾斜，限位扣(102)产生形变，从而限位扣(102)与限位槽(203)产生错位，此时限位扣(102)的限位作用消失，即可转动针杆手柄(2)。
  8. 一种防转动活检针，包括针管组件和针杆组件，所述针管组件包括针管(5)和针管手柄(1)，所述针杆组件包括针杆(6)和针杆手柄(2)，所述针管的尾部连接有针管手柄(1)，所述针管手柄(1)的顶部设有鲁尔接口(103)，所述针杆(6)的尾部连接针杆手柄(2)，其特征在于：所述针管手柄(1)上设置有第一限位装置，所述第一限位装置包括位于鲁尔接口(103)一侧的旋转扣(101)以及与旋转扣(101)相对的限位扣(102)，所述旋转扣(101)的支撑部(101-1)支撑于鲁尔接口(103)的一侧，所述支撑部(101-1)向上延伸出与其呈直角设置的钩部(101-2)；
    所述针杆手柄(2)上设置有第二限位装置，所述第二限位装置包括与旋转扣(101)相配合的旋转槽(201)，所述旋转槽(201)供钩部(101-2)旋进并锁紧，限制针杆手柄的轴向转动；所述第二限位装置还包括与限位扣(102)相配合的导向槽(202)，所述导向槽直径较小的一端为限位槽(203)，所述导向槽(202)为一段直径线性减小的槽口，所述限位扣(102)在初始阶段插入导向槽(202)直径较大的一端，随着旋转针杆手柄，所述限位扣(102)的外侧面沿着贴合导向槽(202)内侧面转动并受力向内侧变形，限位扣(102)完全进入限位槽(203)时恢复形变，进而啮合，以限制针杆手柄的轴向转动。
  9. 根据权利要求8所述的一种防转动活检针，其特征在于：所述针杆 手柄上还设置有解锁装置，所述解锁装置包括位于限位扣(102)外侧的解锁按钮(301)，在锁紧状态时，所述限位扣(102)位于限位槽(203)内，当需要解锁时，解锁按钮(301)朝限位扣(102)方向倾斜，限位扣(102)产生形变，从而限位扣(102)与限位槽(203)产生错位，此时限位扣(102)的限位作用消失，即可转动针杆手柄。
  10. 根据权利要求8所述的一种防转动活检针，其特征在于：所述针杆组件还包括针杆手柄盖(3)，所述针杆手柄盖(3)的周向设置有一组凹槽。
  11. 根据权利要求8所述的一种防转动活检针，其特征在于：所述针管(5)为中空结构，其端部具有斜面穿刺针头(501)。
  12. 根据权利要求8所述的一种防转动活检针，其特征在于：所述针杆(6)为实芯结构，其端部具有与穿刺针头(501)同角度的斜面并保持齐平，组成穿刺刃。
  13. 根据权利要求8所述的一种防转动活检针，其特征在于：所述针管(5)贯穿调节手柄(4)并与针管手柄(1)连接。
PCT/CN2019/129242 2018-12-28 2019-12-27 一种防转动活检针 WO2020135726A1 (zh)

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