WO2020168485A1 - 具有两种激发形式的活检针 - Google Patents

具有两种激发形式的活检针 Download PDF

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Publication number
WO2020168485A1
WO2020168485A1 PCT/CN2019/075576 CN2019075576W WO2020168485A1 WO 2020168485 A1 WO2020168485 A1 WO 2020168485A1 CN 2019075576 W CN2019075576 W CN 2019075576W WO 2020168485 A1 WO2020168485 A1 WO 2020168485A1
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Prior art keywords
button
excitation
winding
winding button
needle
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PCT/CN2019/075576
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English (en)
French (fr)
Inventor
王沁
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王沁
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Priority to PCT/CN2019/075576 priority Critical patent/WO2020168485A1/zh
Publication of WO2020168485A1 publication Critical patent/WO2020168485A1/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
    • A61B10/0266—Pointed or sharp biopsy instruments means for severing sample
    • A61B10/0275—Pointed or sharp biopsy instruments means for severing sample with sample notch, e.g. on the side of inner stylet
    • 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
    • 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
    • A61B2010/0208—Biopsy devices with actuators, e.g. with triggered spring mechanisms

Definitions

  • the present invention relates to the technical field of medical devices, in particular to a biopsy needle with two excitation forms.
  • Tissue tumors are diseases that seriously endanger human health and life. In recent years, the incidence rate has gradually increased, and the age of onset has gradually decreased. Correct judgment as soon as possible has an important impact. Correct diagnosis requires the combination of clinical, imaging and pathology. Among them, pathological diagnosis plays a key role in the choice of treatment plan, and needle biopsy is the main way to obtain tissue samples.
  • Biopsy products are divided into manual biopsy needle, motorized integrated type, and motorized assembly type.
  • the motorized integrated type is divided into two functional forms: two excitation and one excitation.
  • the existing mobile integrated biopsy needles function as a single one-shot or a single two-shot, in a variety of lesions, such as: thyroid, prostate, liver, kidney, breast, spleen, lymph node and soft tissue
  • lesions such as: thyroid, prostate, liver, kidney, breast, spleen, lymph node and soft tissue
  • the structure of the lesion is also different for each patient, and different emergencies may occur at any time during the operation, such as the distance from the blood vessel to the lesion in different parts, the distance from the nerve tissue to the lesion, the above factors will cause Surgeons have questions about the appropriateness of the selection of biopsy needles with different functions.
  • the present invention provides a biopsy needle with two excitation forms, so as to achieve the purpose of a biopsy needle that can provide multiple excitation forms.
  • a biopsy needle with two types of excitation which includes an inner needle and an outer needle sheathed outside the inner needle, and also includes a winding assembly and an excitation assembly;
  • the winding assembly includes The first winding button, the second winding button and the stop block, the first winding button is connected to the tail end of the outer needle, the second winding button is connected to the tail end of the inner needle, and the first winding button is connected to the tail end of the inner needle.
  • the end of the winding button and the second winding button away from the inner needle are respectively provided with hooks, and the limiting block is provided with two bayonet holes for engaging with the hooks, the first The winding button and the second winding button are respectively connected to the stop block by an excitation compression spring; the ejection direction of the excitation compression spring is consistent with the needle insertion direction of the biopsy needle; the excitation assembly includes a first pushing member , The second pushing member, the primary excitation device and the secondary excitation device; the first pushing member is provided with a pushing plate opposite to the hook on the first winding button, and the second pushing member is provided with A push plate disposed opposite to the hook on the second winding button, the push plate is used to push the hook to move to separate the hook from the bayonet, the first pushing member and the The bottom of the second pushing member is respectively connected to the slide rail, the front end of the slide rail is provided with an anti-dropping baffle, and the rear end is provided with a pushing plate.
  • the primary excitation device includes a post-excitation button for synchronous triggering of the first pusher and the second pusher, the post-excitation button is connected to the slide rail through a connecting device;
  • the secondary excitation device includes The first pressing part and the second pressing part are used to activate the first pushing member and the second pushing member successively.
  • the biopsy needle further includes a housing, the housing includes a base and an upper cover, the base is buckled on the upper cover so as to enclose a cavity; the limit block, the excitation compression spring , The first pushing member and the second pushing member are both arranged in the cavity and located on the base; the first winding button and the second winding button partially extend into the cavity,
  • the housing is provided with a through hole for installing the rear activation button, and the first pressing portion and the second pressing portion are provided on the upper cover.
  • the connecting device includes a button spring and a push rod;
  • the push rod has two parallel arms, and the first ends of the two arms are connected to each other; the rear activation button and the limiting block pass through
  • the button compression spring is connected; the first ends of the two arms of the push rod are fixedly connected to the rear activation button, and the second ends of the two arms are respectively connected to the first pushing member and the second pushing member.
  • the slide rail connection is
  • a window is provided on the upper cover above the first pushing member and the second pushing member, and the window is provided with a first elastic sheet and a second elastic sheet; the first elastic The sheet is connected with the first pressing portion, and the second elastic sheet is connected with the second pressing portion.
  • the primary excitation device further includes a side excitation button, one of the arms of the push rod is provided with a connecting plate extending away from the rear excitation button, and the connecting plate is far from the push rod.
  • One end is connected with the side activation button, and the free end of the side activation button is located outside the casing.
  • an extension portion extending outward is provided on the base, the extension portion is located below the first winding button and the second winding button, and the extension portion is provided with a front cover and an end
  • the part is provided with a perforation;
  • the bottoms of the first winding button and the second winding button are respectively provided with a limiting plate, and there is a defined interval between the limiting plate and the first winding button and the second winding button ,
  • the front cover is inserted into the gap, the outer needle is connected with the limiting plate at the bottom of the first winding button, and the inner needle is connected with the limiting plate at the bottom of the second winding button, The inner needle and the outer needle pass through the perforation.
  • the first winding button and the second winding button are provided with a guide plate arranged along the direction of the sliding stroke, and a guide groove connected to the guide plate is provided on the base.
  • the surfaces of the first winding button, the second winding button, the first elastic sheet and the second elastic sheet are respectively provided with a lettering surface layer.
  • the first sliding stroke is 0.5 mm
  • the second sliding stroke is 0.1 mm.
  • first elastic sheet and the second elastic sheet are integrally formed with the upper cover, and the edge of the window is provided with a raised protective wall.
  • the present invention provides a biopsy needle with two excitation forms.
  • the inner needle and the outer needle are wound by the winding assembly, and then the inner needle and the outer needle in the winding state are excited by the excitation device to collect the human body
  • the excitation device For the purpose of tissue, during the biopsy operation, one or two excitations of the inner needle and the outer needle can be selected according to the operation requirements of the biopsy.
  • the biopsy needle integrates the functional form of one-shot and two-shot together.
  • the two excitation methods can be switched at any time, which solves the problem of which excitation method the doctor should choose when dealing with the cumbersome and complicated focus environment, and can be free at any time Provide the most timely and most suitable biopsy program for the patient.
  • Fig. 1 is a schematic structural diagram of a biopsy needle with two excitation forms according to an embodiment of the present invention
  • Figure 2 is an exploded view of a biopsy needle with two excitation forms according to an embodiment of the present invention
  • Fig. 3 is a front view of the inside of the housing in the stringed state of the biopsy needle with two excitation forms according to an embodiment of the present invention
  • Figure 4 is a partial enlarged view of the limit block in Figure 3;
  • Figure 5 is a cross-sectional view of the limiting block in Figure 3;
  • Fig. 6 is a schematic structural diagram of a push rod of a biopsy needle with two excitation forms according to an embodiment of the present invention
  • Figure 7 is a schematic structural view of the upper cover of the biopsy needle with two excitation forms according to an embodiment of the present invention.
  • a biopsy needle with two types of excitation including an inner needle 1 and an outer needle 2 sheathed outside the inner needle 1, also includes a winding component and an excitation component;
  • the winding component includes the first winding Button 3, second winding button 13 and limit block 17, the first winding button 3 is connected to the tail end of the outer needle 2, the second winding button 13 is connected to the tail end of the inner needle 1, the first winding button 3 and the second
  • the end of the winding button 13 away from the inner needle 1 is respectively provided with a hook 19, the limit block 17 is provided with two bayonet ports 20 for engaging with the hook 19, the first winding button 3 and the second winding button 13 are respectively
  • the activation compression spring 12 is connected with the limiting block 17; the ejection direction of the activation compression spring 12 is consistent with the needle insertion direction of the biopsy needle.
  • the excitation assembly includes a first pusher 9, a second pusher 10, a primary excitation device and a secondary excitation device; the first pusher 9 is provided with a push plate 18 opposite to the hook 19 on the first winding button 3.
  • the second pushing member 10 is provided with a push plate 18 opposite to the hook 19 on the second winding button 13.
  • the push plate 18 is used to push the hook 19 to move so that the hook 19 is separated from the bayonet 20.
  • the first push The bottom of the piece 9 and the second pushing piece 10 are respectively connected to the slide rail 21.
  • the front end of the slide rail 21 is provided with an anti-dropping baffle 22, and the rear end is provided with a pushing plate 23.
  • first sliding stroke between the plates 23, and the second pushing member 10 has a second sliding stroke between the anti-falling baffle 22 and the pushing plate 23; the first sliding stroke is greater than the second sliding stroke; the directions of the two sliding strokes are parallel In the needle entry direction; as shown in Figure 4, the first sliding stroke is d1, and the second sliding stroke is d2.
  • the primary excitation device includes a post-excitation button 7 for synchronous excitation of the first pusher 9 and the second pusher 10, the post-excitation button 7 is connected to the slide rail 21 through a connecting device; the secondary excitation device includes a first pusher 9 The first pressing part and the second pressing part are activated successively with the second pushing member 10.
  • the biopsy needle inner needle 1 and outer needle 2 have two excitation methods, which are divided into one excitation and two excitations.
  • the two excitation methods can be switched at will. When performing puncture operations, you can choose the appropriate one according to the needs of the puncture operation. Excitation method.
  • two hooks 19 are arranged in parallel up and down on the first winding button 3 and the second winding button 13 respectively, and two sets of bayonet 20 are respectively arranged up and down on the limit block 17, respectively, in the first pushing member 9 and Two push plates 18 are respectively provided on the second pusher 10.
  • This structure makes the winding state of the first winding button 3 and the second winding button 13 more stable and reduces the probability of false excitation.
  • the biopsy needle further includes a housing, the housing includes a base 6 and an upper cover 11, the base 6 is buckled on the upper cover 11 so as to enclose a chamber; a limit block 17, an excitation compression spring 12,
  • the first pushing member 9 and the second pushing member 10 are both arranged in the chamber and located on the base 6; the first winding button 3 and the second winding button 13 partially extend into the chamber, and the housing is provided with a button for activation after installation 7, the first pressing part and the second pressing part are provided on the upper cover 11.
  • the first winding button 3 and the second winding button 13 are arranged side by side.
  • the winding assembly and excitation assembly of the biopsy needle are mainly arranged in the chamber of the housing, and some parts that need to be operated are arranged outside the housing or on the housing, including part of the first winding button 3 and the second winding button 13,
  • the rear activation button 7, the first pressing part and the second pressing part by setting the shell structure, it is convenient to assemble various parts, and at the same time, the shell protects the parts; the shell is also convenient to hold and is in progress.
  • anti-skid patterns can be provided on the surface of the housing to avoid the phenomenon of hand-held slippage.
  • the connecting device includes a button spring and a push rod 25;
  • the push rod 25 has two parallel arms, the first ends of which are connected to each other; the rear activation button 7 and the stop block 17 pass between The button compression spring 8 is connected; the first ends of the two arms of the push rod 25 are fixedly connected to the rear activation button 7, and the second ends of the two arms are respectively connected to the slide rail 21 of the first pushing member 9 and the second pushing member 10, preferably ,
  • the second end of the push rod 25 and the slide rail 21 are integrally formed.
  • the purpose of the one-time activation device is to activate the inner needle 1 and the outer needle 2 at one time after the activation button 7 is pressed. Therefore, the pushing force of the button 7 is activated after the two arms of the push rod 25 are transmitted, and the first pushing member 9 can be simultaneously pushed And the second pusher 10 to achieve one excitation.
  • the inner needle 1 needs to be advanced in the needle and the outer needle 2 is advanced in the needle. That is, there is a time difference between the ejection timings of the two.
  • this embodiment proposes to The sliding stroke is set to be greater than the second sliding stroke; when the two arms of the push rod 25 move synchronously, the two sliding rails 21 are first pushed to move.
  • the sliding rail 21 on which the second pushing member 10 is located The pushing plate 23 first pushes the second pushing member 10 to move, so that the second pushing member 10 pushes the hook 19 of the second winding button 13 to separate from the bayonet 20, excites the inner needle 1, so that the inner needle advances in the needle, and then the push rod 25 The two arms continue to drive the slide rail 21 to move.
  • the push plate 23 on the slide rail 21 where the first pusher 9 is located first pushes the first pusher 9 to move, so that the first pusher 9 pushes the hook 19 of the first winding button 3 Separate from the bayonet 20, excite the outer needle 2, make the outer needle enter the needle, and complete the inner needle 1 and the outer needle 2.
  • the first sliding stroke d1 is 0.5mm
  • the second sliding stroke d2 is 0.1mm .
  • a window is provided on the upper cover 11 above the first pushing member 9 and the second pushing member 10, and a first elastic sheet 14 and a second elastic sheet 15 are provided on the windows;
  • the sheet 14 is connected to the first pressing portion, and the second elastic sheet 15 is connected to the second pressing portion.
  • the first elastic sheet 14 and the second elastic sheet 15 are integrally formed with the upper cover 11, and a raised protective wall 16 is provided on the edge of the window.
  • the purpose of the secondary excitation device is to activate the inner needle 1 and the outer needle 2 respectively.
  • the first elastic sheet 14 is connected to the first pressing part
  • the second elastic sheet 15 is connected to the second pressing part
  • the first elastic sheet 14 or the second elastic sheet is manually pressed down.
  • the first pressing part or the second pressing part is driven to move accordingly, and then the first pushing member 9 or the second pushing member 10 is pushed to realize the excitation of the inner needle 1 or the outer needle 2.
  • the first pressing part and the second pressing part are provided with inclined inclined surfaces
  • the first pressing part 9 and the second pressing part 10 are provided with inclined surfaces corresponding to the first pressing part and the second pressing part.
  • the primary excitation device further includes a side excitation button 5.
  • One arm of the push rod 25 is provided with a connecting plate extending away from the rear excitation button 7, and one end of the connecting plate away from the push rod 25 Connected to the side firing button 5, the free end of the side firing button 5 is located on the outside of the housing.
  • the side firing button 5 and the rear firing button 7 have the same function, they are both to achieve a firing of the inner needle 1 and the outer needle 2.
  • the difference between the two is that one is located at the end of the housing and the other is located at the side of the housing.
  • the button on one side is inconvenient to operate, the button on the other side can be operated.
  • the side activation button 5 can be operated to perform an activation operation.
  • the base 6 is provided with an extension portion 24 extending outward, the extension portion 24 is located below the first winding button 3 and the second winding button 13, and the extension portion 24 is provided with a front cover 4 and The end is provided with perforations; the bottoms of the first winding button 3 and the second winding button 13 are respectively provided with a limit plate, and there is a limited interval between the limit plate and the first winding button 3 and the second winding button 13.
  • the front cover 4 Inserted into the gap, the outer needle 2 is connected with the limiting plate at the bottom of the first winding button 3, the inner needle 1 is connected with the limiting plate at the bottom of the second winding button 13, and the inner needle 1 and the outer needle 2 are penetrated by the perforation.
  • the extension part 24 is used to limit the first winding button 3 and the second winding button 13, and a limit plate is provided under the first winding button 3 and the second winding button 13, and the limit plate and the first winding button 3
  • a socket is formed between the two winding buttons 13 and is inserted into the front cover 4 to prevent the first winding button 3 and the second winding button 13 from moving in a direction perpendicular to the front cover 4.
  • the first winding button 3 and the second winding button 13 are provided with a guide plate arranged along the direction of the sliding stroke, and the base 6 is provided with a guide groove connected to the guide plate.
  • the horizontal position can be limited, and at the same time, the first winding button 3 and the second winding button 13 can be guided.
  • the winding and excitation can be performed within a prescribed range of movement, ensuring the normal puncture operation.
  • the surfaces of the first winding button 3, the second winding button 13, the first elastic sheet 14 and the second elastic sheet 15 are respectively provided with a lettering surface layer.
  • the biopsy needle has a sequence when used, that is, the inner needle 1 needs to be punched out first, and then the outer needle 2 is punched out.
  • a lettering surface can be set on the corresponding key position. Numbers are marked on the surface of the engraving to act as a reminder.
  • an activation operation manually press the activation button 7 or the side activation button 5, the two arms of the push rod 25 drive the slide rail 21 to move, and after offsetting the second sliding stroke and the first sliding stroke, the second pushing member 10 and The first pushing member 9 energizes the inner needle 1 and the outer needle 2 respectively to complete one excitation.
  • manually press the second elastic sheet 15 and the second pressing part pushes the second pushing member 10 to move to excite the inner needle 1.
  • manually press the first elastic sheet 14, and the first pressing part pushes the first pushing member 9 moves to excite the outer needle 2 to complete the second excitation.
  • the biopsy needle integrates the functional form of one-shot and two-shot together.
  • the two excitation methods can be switched at any time, which solves the problem of which excitation method the doctor should choose when dealing with the cumbersome and complicated focus environment, and can be free at any time Provide the most timely and most suitable biopsy program for the patient.

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Abstract

一种具有两种激发形式的活检针，涉及医疗器械技术领域，活检针包括上弦组件和激发组件；上弦组件包括第一上弦按钮（3）、第二上弦按钮（13），第一上弦按钮（3）与外针（2）连接，第二上弦按钮（13）与内针（1）连接，激发组件包括第一推动件（9）、第二推动件（10），一次激发装置和二次激发装置；一次激发装置包括用于第一推动件（9）和第二推动件（10）同步触发的后激发按钮（7）；二次激发装置包括用于第一推动件（9）和第二推动件（10）逐步触发的第一按压部和第二按压部。活检针集一次激发和两次激发的功能形式于一起，两种激发方式可以随时切换，解决了医生在应对繁琐复杂病灶环境时，该选择何种激发方式的活检针的问题，可以随时自如地提供最及时最适合病人的活检方案。

Description

具有两种激发形式的活检针 技术领域
本发明涉及医疗器械技术领域，特别地涉及一种具有两种激发形式的活检针。
背景技术
组织肿瘤是严重危害人类健康及生命的疾病，近年来发病率逐渐上升，且发病年龄逐渐下降，尽早正确的判断有重要的影响。正确的诊断需要临床、影像及病理三结合，其中，病理诊断对治疗方案的选择起着关键作用，穿刺活检是获取组织样本的主要途径。
活检产品分为手动式活检针、机动一体式、机动装配式，其中，机动一体式又分为两次激发和一次激发两种功能形式。目前，现有的机动一体式的活检针，其功能是单一的一次激发或者是单一的两次激发，在繁多的病灶部位，如：甲状腺、前列腺、肝脏、肾脏、乳腺、脾脏淋巴结软组织等部位，每个病人的病灶部位结构也是不尽相同，而且手术过程中也会随时出现不同的突发情况，如不同部位血管到病灶距离的远近，神经组织到病变部位的距离，以上各因素都会导致手术人员在不同功能的活检针的选择上出现是否合适的问题。
由此可知，为满足繁多的病灶部位使用以及适用各种突发情况，目前亟需一种兼顾多种激发形式的活检枪。
发明内容
有鉴于此，本发明提供一种具有两种激发形式的活检针，以达到一种活检针能够提供多种激发形式的目的。
为实现上述目的，根据本发明提供了一种具有两种激发形式的活检针，包括内针和套设在所述内针外部的外针，还包括上弦组件和激发组件；所述上弦组件包括第一上弦按钮、第二上弦按钮和限位块，所述第一上弦按钮与所述外针的尾端连接，所述第二上弦按钮与所述内针的尾端连接，所述第一上弦按钮和所述第二上弦按钮的远离所述内针的一端分别设有卡钩，所述限位块上设有两个用于与所述卡钩卡接的卡口，所述第一上弦按钮和所述第二上弦按钮分别通过激发压簧与所述限位块连接；所述激发压簧的弹出方向与所述活检针的进针方向一致；所述激发组件包括第一推动件、第二推动件，一次激发装置和二次激发装置；所述第一推动件上设有与所述第一上弦按钮上的卡钩相对设置的推板，所述第二推动件上设有与所述第二上弦按钮上的卡钩相对设置的推板，所述推板用于推动所述卡钩移动，使所述卡钩与所述卡口分离，所述第一推动件和所述第二推动件的底部分别连接滑轨，所述滑轨的前端设有防脱挡板，尾端设有推动板，所述第一推动件在所述防脱挡板和所述推动板之间具有第一滑动行程；所述第二推动件在所述防脱挡板和所述推动板之间具有第二滑动行程；所述两个滑动行程的方向平行于所述进针方向；所述一次激发装置包括用于所述第一推动件和所述第二推动件同步触发的后激发按钮，所述后激发按钮通过连接装置与所述滑轨连接；所述二次激发装置包括用于所述第一推动件和所述第二推动件先后激发的所述第一按压部和第二按压部。
可选地，所述活检针还包括壳体，所述壳体包括底座和上盖，所述底座扣于所述上盖上从而围成腔室；所述限位块、所述激发压簧、所述第一推动件和所述第二推动件均设于所述腔室内，且位于所述底座上；所述第一上弦按钮和所述第二上弦按钮部分伸入所述腔室内，所述壳体上设有用于安装所述后激发按钮的通孔，所述第一按压部和第二按压部设于所述上盖上。
可选地，所述连接装置包括按钮弹簧和推杆；所述推杆具有平行 的两臂，该两臂的第一端互相连接；所述后激发按钮与所述限位块之间通过所述按钮压簧连接；所述推杆两臂的第一端与所述后激发按钮固定连接，所述两臂的第二端分别与所述第一推动件和所述第二推动件的所述滑轨连接。
可选地，所述上盖上位于所述第一推动件和所述第二推动件的上方设有窗口，所述窗口上设有第一弹性片和第二弹性片；所述第一弹性片与所述第一按压部连接，所述第二弹性片与所述第二按压部连接。
可选地，所述一次激发装置还包括侧激发按钮，所述推杆的其中一臂上设有向远离所述后激发按钮方向延伸的连接板，所述连接板的远离所述推杆的一端与所述侧激发按钮连接，所述侧激发按钮的自由端位于所述壳体的外侧。
可选地，所述底座上设有向外延伸的延伸部，所述延伸部位于所述第一上弦按钮和所述第二上弦按钮的下方，所述延伸部上设有前盖板并且端部设有穿孔；所述第一上弦按钮和所述第二上弦按钮的底部分别设置限位板，所述限位板与所述第一上弦按钮和所述第二上弦按钮之间具有限定间隔，所述前盖板插接于所述间隔内，所述外针与所述第一上弦按钮底部的限位板连接，所述内针与所述第二上弦按钮底部的限位板连接，所述内针和所述外针由所述穿孔穿出。
可选地，所述第一上弦按钮和所述第二上弦按钮上设有沿所述滑动行程的方向设置的导向板，所述底座上设有与所述导向板连接的导向槽。
可选地，所述第一上弦按钮、第二上弦按钮、所述第一弹性片和所述第二弹性片的表面分别设有刻字表层。
可选地，所述第一滑动行程为0.5mm，所述第二滑动行程为0.1mm。
可选地，所述第一弹性片和所述第二弹性片与所述上盖一体成型，所述窗口的边缘设有凸起的保护壁。
本发明提供的一种具有两种激发形式的活检针，使用时，利用上弦组件对内针和外针进行上弦，之后，利用激发装置将处于上弦状态的内针和外针激发，达到采集人体组织的目的，活检手术过程中，可根据穿刺活检的操作需求选择内针和外针的一次激发或两次激发。
该活检针集一次激发和两次激发的功能形式于一起，两种激发方式可以随时切换，解决了医生在应对繁琐复杂病灶环境时，该选择何种激发方式的活检针的问题，可以随时自如的提供最及时最适合病人的活检方案。
附图说明
附图用于更好地理解本发明，不构成对本发明的不当限定。其中：
图1是根据本发明实施例的具有两种激发形式的活检针的结构示意图；
图2是根据本发明实施例的具有两种激发形式的活检针的爆炸图；
图3是根据本发明实施例的具有两种激发形式的活检针上弦状态的壳体内部的主视图；
图4是图3中的限位块处的局部放大图；
图5是图3中的限位块处的剖视图；
图6是根据本发明实施例的具有两种激发形式的活检针的推杆的结构示意图；
图7是根据本发明实施例的具有两种激发形式的活检针的上盖的结构示意图；。
其中，1、内针；2、外针；3、第一上弦按钮；4、前盖板；5、侧激发按钮；6、底座；7、后激发按钮；8、按钮压簧；9、第一推动件； 10、第二推动件；11、上盖；12、激发压簧；13、第二上弦按钮；14、第一弹性片；15、第二弹性片；16、保护壁；17、限位块；18、推板；19、卡钩；20、卡口；21、滑轨；22、防脱挡板；23、推动板；24、延伸部；25、推杆。
具体实施方式
以下结合附图对本发明的示范性实施例做出说明，其中包括本发明实施例的各种细节以助于理解，应当将它们认为仅仅是示范性的。因此，本领域普通技术人员应当认识到，可以对这里描述的实施例做出各种改变和修改，而不会背离本发明的范围和精神。同样，为了清楚和简明，以下的描述中省略了对公知功能和结构的描述。
如图1-7所示，一种具有两种激发形式的活检针，包括内针1和套设在内针1外部的外针2，还包括上弦组件和激发组件；上弦组件包括第一上弦按钮3、第二上弦按钮13和限位块17，第一上弦按钮3与外针2的尾端连接，第二上弦按钮13与内针1的尾端连接，第一上弦按钮3和第二上弦按钮13的远离内针1一端分别设有卡钩19，限位块17上设有两个用于与卡钩19卡接的卡口20，第一上弦按钮3和第二上弦按钮13分别通过激发压簧12与限位块17之间连接；激发压簧12的弹出方向与活检针的进针方向一致。
激发组件包括第一推动件9、第二推动件10，一次激发装置和二次激发装置；第一推动件9上设有与第一上弦按钮3上的卡钩19相对设置的推板18，第二推动件10上设有与第二上弦按钮13上的卡钩19相对设置的推板18，推板18用于推动卡钩19移动，使卡钩19与卡口20分离，第一推动件9和第二推动件10的底部分别连接滑轨21，滑轨21的前端设有防脱挡板22，尾端设有推动板23，第一推动件9在防脱挡板22和推动板23之间具有第一滑动行程，第二推动件10在防脱挡板22和推动板23之间具有第二滑动行程；第一滑动行程大于第二滑动行程；两个滑动行程的方向平行于进针方向；如图4所示，第 一滑动行程为d1，第二滑动行程为d2。
一次激发装置包括用于第一推动件9和第二推动件10同步激发的后激发按钮7，后激发按钮7通过连接装置与滑轨21连接；二次激发装置包括用于第一推动件9和第二推动件10先后激发的第一按压部和第二按压部。
该活检针内针1和外针2的激发方式包括两种，分为一次激发和两次激发，两种激发方式可以随意切换使用，在进行穿刺手术时，可根据穿刺操作的需求选择适合的激发方式。
优选地，在第一上弦按钮3和第二上弦按钮13上分别上下平行设置两个卡钩19，相应的在限位块17上分别上下设置两组卡口20，在第一推动件9和第二推动件10上分别设置两个推板18，此结构使第一上弦按钮3和第二上弦按钮13上弦状态更稳定，降低误激发的几率。
作为本实施例的优选实施方式，活检针还包括壳体，壳体包括底座6和上盖11，底座6扣于上盖11上从而围成腔室；限位块17、激发压簧12、第一推动件9和第二推动件10均设于腔室内，且位于底座6上；第一上弦按钮3和第二上弦按钮13部分伸入腔室内，壳体上设有用于安装后激发按钮7的通孔，第一按压部和第二按压部设于上盖11上，优选地，第一上弦按钮3和第二上弦按钮13并排设置。
活检针的上弦组件和激发组件主要集中设置在壳体的腔室中，部分需要操作的部件设置在壳体外，或设置在壳体上，包括部分第一上弦按钮3和第二上弦按钮13、后激发按钮7、第一按压部和第二按压部；通过设置壳体结构，方便对各零部件拼装，同时，壳体对零部件起到保护作用；再有壳体利于手握，在进行穿刺手术时方便医护人员手持，便于穿刺操作；优选地，可在壳体的表层设置防滑纹，避免出现手持打滑的现象。
作为本实施例的优选实施方式，连接装置包括按钮弹簧和推杆25；推杆25具有平行的两臂，该两臂的第一端互相连接；后激发按钮7与限位块17之间通过按钮压簧8连接；推杆25两臂的第一端与后激发按钮7固定连接，两臂的第二端分别与第一推动件9和第二推动件10的滑轨21连接，优选地，推杆25的第二端与滑轨21一体成型。
一次激发装置的目的是按下后激发按钮7后一次性地激发内针1和外针2，因此，通过推杆25的两臂传动后激发按钮7的推力，可同时推动第一推动件9和第二推动件10，实现一次激发，在一次激发过程中，需要内针1先进针，外针2后进针，即两者弹出时机存在时间差，为达该目的，本实施例提出将第一滑动行程设置大于第二滑动行程；当推杆25的两臂同步移动时，首先推动两个滑轨21移动，由于第二滑动行程相对较短，第二推动件10所在的滑轨21上的推动板23先推动第二推动件10移动，使第二推动件10推动第二上弦按钮13的卡钩19与卡口20分离，激发内针1，使内针先进针，之后，推杆25的两臂继续带动滑轨21移动，第一推动件9所在的滑轨21上的推动板23先推动第一推动件9移动，使第一推动件9推动第一上弦按钮3的卡钩19与卡口20分离，激发外针2，使外针后进针，完成内针1、外针2的先后进针，优选地，第一滑动行程d1为0.5mm，第二滑动行程d2为0.1mm。
作为本实施例的优选实施方式，上盖11上位于第一推动件9和第二推动件10的上方设有窗口，窗口上设有第一弹性片14和第二弹性片15；第一弹性片14与第一按压部连接，第二弹性片15与第二按压部连接。优选地，第一弹性片14和第二弹性片15与上盖11一体成型，窗口的边缘设有凸起的保护壁16。
二次激发装置的目的分别激发内针1和外针2，第一弹性片14连接第一按压部，第二弹性片15连接第二按压部，手动按下第一弹性片 14或第二弹性片15后，带动第一按压部或第二按压部产生相应的移动，进而推动第一推动件9或第二推动件10，实现内针1或外针2的激发。如，第一按压部和第二按压部上设置倾斜的斜面，第一推动件9和第二推动件10上设有第一按压部和第二按压部对应的斜面，当第一按压部或第二按压部移动时，即产生向下的移动，竖直方向的力由两个斜面转换为水平方向的推力，进而推动第一推动件9和第二推动件10移动。具体的，先手动按下第二弹性片15，第二按压部推动第二推动件10移动，使第二上弦按钮13的卡钩19与卡口20分离，激发内针1，之后，手动按下第一弹性片14，第一按压部推动第一推动件9移动，使第一上弦按钮3的卡钩19与卡口20分离，激发外针2，从而完成穿刺操作。
作为本实施例的优选实施方式，一次激发装置还包括侧激发按钮5，推杆25的其中一臂上设有向远离后激发按钮7方向延伸的连接板，连接板的远离推杆25的一端与侧激发按钮5连接，侧激发按钮5的自由端位于壳体的外侧。
侧激发按钮5和后激发按钮7的作用相同，均是实现内针1和外针2的一次激发；两者的区别在于，一个位于可壳体的尾端，一个位于壳体的侧部，在穿刺过程中，如果出现一侧的按钮操作不便的情况，可操作另一侧的按钮，如，当后激发按钮7被遮挡，无法按压时，可操作侧激发按钮5进行一次激发操作。
作为本实施例的优选实施方式，底座6上设有向外延伸的延伸部24，延伸部24位于第一上弦按钮3和第二上弦按钮13下方，延伸部24上设有前盖板4并且端部设有穿孔；第一上弦按钮3和第二上弦按钮13的底部分别设置限位板，限位板与第一上弦按钮3和第二上弦按钮13之间具有限定间隔，前盖板4插接于间隔内，外针2与第一上弦按钮3底部的限位板连接，内针1与第二上弦按钮13底部的限位板连接，内针1和外针2由穿孔穿出。
延伸部24用于限位第一上弦按钮3和第二上弦按钮13，在第一上弦按钮3和第二上弦按钮13的下方均设置限位板，限位板与第一上弦按钮3/第二上弦按钮13之间形成插口，插接在前盖板4上，可避免第一上弦按钮3和第二上弦按钮13沿垂直前盖板4方向移动。
可选地，第一上弦按钮3和第二上弦按钮13上设有沿滑动行程的方向设置的导向板，底座6上设有与导向板连接的导向槽。利用导向板和导向槽，可实现水平方向的限位，同时，对第一上弦按钮3和第二上弦按钮13起到导向作用。通过对第一上弦按钮3和第二上弦按钮13的限位，可使其在规定的移动范围内进行上弦和激发，确保穿刺操作的正常进行。
作为本实施例的优选实施方式，第一上弦按钮3、第二上弦按钮13、第一弹性片14和第二弹性片15的表面分别设有刻字表层。活检针在使用时具有先后顺序，即需要先打出内针1，再打出外针2，为了降低医护人员混淆或操作错误的几率，可在相应的键位上设置刻字表层。刻字表层上标记数字，以起到提示作用。
本实施例中的具有两种激发形式的活检针使用时，先按压第一上弦按钮3和第二上弦按钮13，分别是其上的卡钩19与限位块17上的卡口20卡接，第一上弦按钮3和第二上弦按钮13按压无先后。一次激发操作时，手动按压后激发按钮7或侧激发按钮5，推杆25的两臂带动滑轨21移动，先后抵消第二滑动行程和第一滑动行程后，依次推动第二推动件10和第一推动件9，即分别激发内针1和外针2，完成一次激发。二次激发操作时，手动按压第二弹性片15，第二按压部推动第二推动件10移动，激发内针1，之后，手动按压第一弹性片14，第一按压部推动第一推动件9移动，激发外针2，完成二次激发。
该活检针集一次激发和两次激发的功能形式于一起，两种激发方 式可以随时切换，解决了医生在应对繁琐复杂病灶环境时，该选择何种激发方式的活检针的问题，可以随时自如的提供最及时最适合病人的活检方案。
上述具体实施方式，并不构成对本发明保护范围的限制。本领域技术人员应该明白的是，取决于设计要求和其他因素，可以发生各种各样的修改、组合、子组合和替代。任何在本发明的精神和原则之内所作的修改、等同替换和改进等，均应包含在本发明保护范围之内。

Claims (10)

  1. 一种具有两种激发形式的活检针，包括内针(1)和套设在内针(1)外部的外针(2)，其特征在于，还包括上弦组件和激发组件；
    上弦组件包括第一上弦按钮(3)、第二上弦按钮(13)和限位块(17)，第一上弦按钮(3)与外针(2)的尾端连接，第二上弦按钮(13)与内针(1)的尾端连接，第一上弦按钮(3)和第二上弦按钮(13)的远离内针(1)的一端分别设有卡钩(19)，限位块(17)上设有两个用于与卡钩(19)卡接的卡口(20)，第一上弦按钮(3)和第二上弦按钮(13)分别通过激发压簧(12)与限位块(17)连接；激发压簧(12)的弹出方向与活检针的进针方向一致；
    激发组件包括第一推动件(9)、第二推动件(10)，一次激发装置和二次激发装置；第一推动件(9)上设有与第一上弦按钮(3)上的卡钩(19)相对设置的推板(18)，第二推动件(10)上设有与第二上弦按钮(13)上的卡钩(19)相对设置的推板(18)，推板(18)用于推动卡钩(19)移动，使卡钩(19)与卡口(20)分离，第一推动件(9)和第二推动件(10)的底部分别连接滑轨(21)，滑轨(21)的前端设有防脱挡板(22)，尾端设有推动板(23)，第一推动件(9)在防脱挡板(22)和推动板(23)之间具有第一滑动行程；第二推动件(10)在防脱挡板(22)和推动板(23)之间具有第二滑动行程；第一滑动行程大于第二滑动行程；两个滑动行程的方向平行于进针方向；
    一次激发装置包括用于第一推动件(9)和第二推动件(10)同步激发的后激发按钮(7)，后激发按钮(7)通过连接装置与滑轨(21)连接；
    二次激发装置包括用于第一推动件(9)和第二推动件(10)先后激发的第一按压部和第二按压部。
  2. 根据权利要求1所述的具有两种激发形式的活检针，其特征在于，所述活检针还包括壳体，所述壳体包括底座(6)和上盖(11)， 所述底座(6)扣于所述上盖(11)上从而围成腔室；
    所述限位块(17)、所述激发压簧(12)、所述第一推动件(9)和所述第二推动件(10)均设于所述腔室内，且位于所述底座(6)上；
    所述第一上弦按钮(3)和所述第二上弦按钮(13)部分伸入所述腔室内，所述壳体上设有用于安装所述后激发按钮(7)的通孔，所述第一按压部和第二按压部设于所述上盖(11)上。
  3. 根据权利要求1所述的具有两种激发形式的活检针，其特征在于，所述连接装置包括按钮弹簧(8)和推杆(25)；
    所述推杆(25)具有平行的两臂，该两臂的第一端互相连接；
    所述后激发按钮(7)与所述限位块(17)之间通过所述按钮压簧(8)连接；所述推杆(25)两臂的第一端与所述后激发按钮(7)固定连接，所述两臂的第二端分别与所述第一推动件(9)和所述第二推动件(10)的所述滑轨(21)连接。
  4. 根据权利要求2所述的具有两种激发形式的活检针，其特征在于，所述上盖(11)上位于所述第一推动件(9)和所述第二推动件(10)的上方设有窗口，所述窗口上设有第一弹性片(14)和第二弹性片(15)；
    所述第一弹性片(14)与所述第一按压部连接，所述第二弹性片(15)与所述第二按压部连接。
  5. 根据权利要求3所述的具有两种激发形式的活检针，其特征在于，所述一次激发装置还包括侧激发按钮(5)，所述推杆(25)的其中一臂上设有向远离所述后激发按钮(7)方向延伸的连接板，所述连接板的远离所述推杆(25)的一端与所述侧激发按钮(5)连接，所述侧激发按钮(5)的自由端位于所述壳体的外侧。
  6. 根据权利要求2所述的具有两种激发形式的活检针，其特征在于，所述底座(6)上设有向外延伸的延伸部(24)，所述延伸部(24)位于所述第一上弦按钮(3)和所述第二上弦按钮(13)下方，所述延 伸部(24)上设有前盖板(4)并且端部设有穿孔；
    所述第一上弦按钮(3)和所述第二上弦按钮(13)的底部分别设置限位板，所述限位板与所述第一上弦按钮(3)和所述第二上弦按钮(13)之间具有限定间隔，所述前盖板(4)插接于所述间隔内，所述外针(2)与所述第一上弦按钮(3)底部的限位板连接，所述内针(1)与所述第二上弦按钮(13)底部的限位板连接，所述内针(1)和所述外针(2)由所述穿孔穿出。
  7. 根据权利要求6所述的具有两种激发形式的活检针，其特征在于，所述第一上弦按钮(3)和所述第二上弦按钮(13)上设有沿所述滑动行程的方向设置的导向板，所述底座(6)上设有与所述导向板连接的导向槽。
  8. 根据权利要求1-3任一项所述的具有两种激发形式的活检针，其特征在于，所述第一上弦按钮(3)、第二上弦按钮(13)、所述第一弹性片(14)和所述第二弹性片(15)的表面分别设有刻字表层。
  9. 根据权利要求1-3任一项所述的具有两种激发形式的活检针，其特征在于，所述第一滑动行程为0.5mm，所述第二滑动行程为0.1mm。
  10. 根据权利要求6所述的具有两种激发形式的活检针，其特征在于，所述第一弹性片(14)和所述第二弹性片(15)与所述上盖(11)一体成型，所述窗口的边缘设有凸起的保护壁(16)。
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