WO2022126652A1 - 一种活检针及活检装置 - Google Patents

一种活检针及活检装置 Download PDF

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Publication number
WO2022126652A1
WO2022126652A1 PCT/CN2020/137767 CN2020137767W WO2022126652A1 WO 2022126652 A1 WO2022126652 A1 WO 2022126652A1 CN 2020137767 W CN2020137767 W CN 2020137767W WO 2022126652 A1 WO2022126652 A1 WO 2022126652A1
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Prior art keywords
needle
inner needle
biopsy
seat
wall
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PCT/CN2020/137767
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English (en)
French (fr)
Inventor
王沁
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苏州市立普医疗科技有限公司
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Priority to PCT/CN2020/137767 priority Critical patent/WO2022126652A1/zh
Publication of WO2022126652A1 publication Critical patent/WO2022126652A1/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

Definitions

  • the present invention relates to the technical field of puncture equipment, in particular to a biopsy needle and a biopsy device.
  • Tissue tumors are diseases that seriously endanger human health and life. In recent years, the incidence has gradually increased, and the age of onset has gradually decreased. Therefore, early and correct diagnosis of tissue tumors is of great significance. Correct diagnosis requires a combination of clinical, imaging and pathology. Among them, pathological diagnosis plays a key role in the selection of treatment plans, and needle biopsy is the main way to obtain tissue samples.
  • the main sampling device used during the operation is a biopsy needle, a qualified biopsy needle.
  • the most basic requirements are accurate positioning and safe operation. , so that the operation can be successfully carried out, and the safety of the patient and the medical staff during the operation can be guaranteed.
  • the biopsy device is a commonly used device for puncture biopsy.
  • the doctor takes out the disposable biopsy needle from the packaging box and installs it in the biopsy device. After the excitation, the inner and outer needles release faster. Under the action of inertia, the inner and outer needles will continue to move forward after reaching the limited position. If the connection between the needle body and the needle seat is not firm, under the action of inertial force, the needle body will be displaced relative to the needle seat, so that accurate sampling cannot be performed. bring some harm.
  • the invention provides a biopsy needle and a biopsy device.
  • An adhesive limiting structure is added between the needle body and the needle seat, and the adhesive limiting structure can avoid the relative displacement or separation between the needle body and the needle seat, thereby making the internal
  • the position of the needle and the outer needle is precisely matched, and the use is more secure and reliable.
  • One aspect of the present invention provides a biopsy needle, comprising an inner needle, an inner needle hub connected to the inner needle, an outer needle and an outer needle hub connected to the outer needle, and between the inner needle and the inner needle hub, A bonding limit structure is arranged between the outer needle and the outer needle seat; the relative movement between the inner needle and the inner needle seat and between the outer needle and the outer needle seat is restricted by the bonding limit structure.
  • the inner needle hub includes a chamber for accommodating the inner needle, the outer wall of the inner needle hub is provided with a first perforation that communicates with the chamber, the first perforation is filled with a first bonding structure, and the inner The needle seat and the inner needle are fixedly connected through a first bonding structure; the outer needle seat includes a through hole penetrating the outer needle seat, and the outer wall of the outer needle seat is provided with a second perforation passing through the through hole.
  • the inside is filled with a second adhesive structure, and the outer needle seat and the outer needle are fixedly connected by the second adhesive structure.
  • the outer wall of the inner needle is provided with a raised undercut structure, and the undercut structure is also in the inner needle seat and/or the first bonding structure, or, the outer wall of the inner needle is provided with a concave undercut.
  • the inverted buckle structure is located in the inner needle needle seat, and the inner needle needle seat and/or the first bonding structure is provided with a block for inserting the inverted buckle structure.
  • a raised undercut structure is provided on the outer wall of the outer needle, and the undercut structure is clamped with the needle seat of the outer needle.
  • the inner needle and the inner needle hub are integrally formed, and the outer needle and the outer needle hub are integrally structured.
  • a raised undercut structure is provided on the outer wall of the inner needle, and the undercut structure includes at least one raised rib.
  • the undercut structure includes a plurality of raised ribs, and the plurality of raised ribs are evenly arranged along the circumferential direction of the inner needle.
  • a concave undercut structure is provided on the outer wall of the inner needle, and the undercut structure is a notch.
  • the notch has a set width along the axial direction of the inner needle, and the depth of the notch is not less than the radius of the inner needle.
  • the undercut structure includes a truncated sleeve, the first end of the sleeve is connected with the tail end of the outer needle, and the outer diameter of the first end is the same as that of the outer needle, and the outer diameter of the second end of the sleeve is the same as the outer diameter of the outer needle.
  • the diameter is larger than the outer diameter of the first end; the end of the outer needle seat away from the needle tip of the outer needle is provided with a groove for accommodating the sleeve, the cross-section of the groove is in the shape of a bell mouth, and the outer wall of the sleeve and the side wall of the groove are in contact with each other. catch.
  • a biopsy device comprising the aforementioned biopsy needle.
  • an adhesive limiting structure and an inverted buckle structure are added between the needle body (including the inner needle and the outer needle) and the needle seat (including the inner needle needle seat and the outer needle needle seat), The limit structure and the inverted buckle structure make the connection between the needle body and the needle seat more firmly.
  • the bonding limit structure and the inverted buckle structure can avoid the inertial displacement of the inner needle and the outer needle due to their high-speed motion, and can avoid the separation of the inner needle and the inner needle needle seat, so that the position of the inner needle and the outer needle can be avoided.
  • the biopsy needle has the characteristics of safe, reliable and stable structure.
  • FIG. 1 is a cross-sectional view of a biopsy needle provided by an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of an inverted structure on an inner needle in a biopsy needle provided by an embodiment of the present invention
  • FIG. 3 is a schematic diagram of another inverted structure on the inner needle of the biopsy needle provided by an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an inverted structure on the outer needle of the biopsy needle according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a biopsy device provided by an embodiment of the present invention.
  • FIG. 6 is an exploded view of a biopsy device provided by an embodiment of the present invention.
  • 1 power device; 2: winding handle; 3: inner needle seat; 4: inner needle; 5: outer needle seat; 6: outer needle; 7: activation button; 81: first bonding structure; 82: first 2. Bonding structure; 41: Notch; 42: Raised rib; 43: Inner needle tip; 61: Sleeve; 62: Outer needle tip.
  • FIG. 1 is a cross-sectional view of a biopsy needle provided by an embodiment of the present invention.
  • the biopsy needle includes an inner needle 4 , an inner needle hub 3 connected to the inner needle 4 , an outer needle 6 and an outer needle hub 5 connected to the outer needle 6 , the inner needle 4 and the inner needle hub 3
  • the bonding limit structure Between the inner needle 4 and the inner needle needle seat 3 and between the outer needle 6 and the outer needle 6 seat are limited by the bonding limit structure. relative movement between them.
  • the inner needle 4 and the inner needle needle seat 3 are integrally constructed, and the outer needle 6 and the outer needle needle seat 5 are integrally structured, wherein, preferably, the inner needle 4 is integrated with the inner needle needle seat 3 and the outer needle 6 It is integrally injection-molded with the outer needle seat 5, and the injection-molded structure is adopted, and the two have strong connection strength. On this basis, an adhesive limiting structure is added between the needle body and the needle seat, so that the connection between the two is more firm.
  • the adhesive limiting structure can further avoid the inertial displacement of the inner needle 4 and the outer needle 6 caused by their high-speed motion, and can avoid the separation of the inner needle 4 and the inner needle 4 seat, so that the inner needle 4 and the outer needle 6 are separated. 6.
  • Accurate position coordination, accurate excitation range can accurately reach the lesion position according to the position set by the surgeon, and protect the personal safety of medical staff and patients.
  • the biopsy needle has the characteristics of safe, reliable and stable structure.
  • the inner needle hub 3 includes a chamber for accommodating the inner needle 3 , the outer wall of the inner needle hub 3 is provided with a first perforation penetrating through the chamber, and the first perforation is filled with a first perforation.
  • Bonding structure 81, the inner needle seat 3 and the inner needle 4 are fixedly connected by the first bonding structure 81;
  • the outer needle seat 5 includes a through hole passing through the outer needle seat 5, and the outer wall of the outer needle seat 5 is provided with
  • the second through hole passing through the through hole is filled with a second adhesive structure 82 , and the outer needle hub 5 and the outer needle 6 are fixedly connected through the second adhesive structure 82 .
  • the first bonding structure 81 and the second bonding structure 82 are solid glues, and the bottoms of the first and second perforations have a certain width, so that the first bonding structure 81 is bonded to the outer wall of the inner needle 4 and the second bonding structure.
  • the structure 82 and the outer wall of the outer needle 6 have a sufficient bonding area to make the two firmly connected.
  • the stability of the connection between the needle body and the needle seat bracket can also be increased by providing an inverted structure.
  • a concave undercut structure is provided on the outer wall of the inner needle 4, and the undercut structure is located in the inner needle hub 3, and the inner needle hub 3 and /or the first adhesive structure 81 is provided with a stopper for inserting the undercut structure.
  • the outer wall of the outer needle 6 is provided with a protruding inverted buckle structure, and the inverted buckle structure is clamped with the outer needle needle seat 5 .
  • the inner needle 4 is a solid structure, and the outer needle 6 is a hollow structure. Therefore, the undercut structure on the inner needle 4 can be a convex structure or a concave structure, while the undercut structure on the outer needle 6 is only a convex structure. up the structure.
  • FIG. 2 is a schematic diagram of an inverted structure on the inner needle of the biopsy needle according to an embodiment of the present invention.
  • a raised undercut structure is provided on the outer wall of the inner needle 4 , and the undercut structure includes at least one raised rib 42 .
  • the undercut structure includes a plurality of raised ribs 42 , and the plurality of raised ribs 42 are evenly arranged along the circumferential direction of the inner needle 4 .
  • the raised rib 42 enlarges the outer diameter of the inner needle 4, and this part of the structure is inserted into the inner needle hub 3 or into the first bonding structure, so that the inner needle 4 and the inner needle hub 3 are connected more firmly.
  • FIG. 3 is a schematic diagram of another inverted buckle structure on the inner needle of the biopsy needle provided by the embodiment of the present invention.
  • a concave undercut structure is provided on the outer wall of the inner needle 4.
  • the undercut structure is a notch 41.
  • the notch 41 has a set width along the axis of the inner needle 4, and the depth of the notch 41 is not less than that of the inner needle. 4 radius.
  • the inner needle hub 3 or the first adhesive structure 81 is provided with a raised stopper, and the stopper is inserted into the notch 41 to form a firm limiting structure.
  • the undercut structure includes a truncated truncated sleeve 61 , the first end of the sleeve 61 is connected to the tail end of the outer needle 6 , and the outer diameter of the first end is the same as that of the outer needle 6 ,
  • the outer diameter of the second end of the sleeve 61 is larger than the outer diameter of the first end; the end of the outer needle seat 5 away from the needle tip of the outer needle 6 is provided with a groove for accommodating the sleeve 61.
  • the outer wall of the barrel 61 is in abutment with the side wall of the groove.
  • the inverted buckle structure is set as a circular truncated structure, which can not only play a limiting role, but also appropriately increase the diameter of the outer needle 6 to facilitate the insertion operation of the inner needle 4 .
  • the outer wall of the outer needle can also adopt a raised inverted buckle structure, and the inverted buckle structure is inserted into the outer needle needle seat or the second bonding structure.
  • the end of the outer needle hub 5 is provided with a socket extending along the axis direction of the outer needle 6, and the front end of the inner needle hub 3 is provided with a plug post extending along the axis direction of the inner needle 4, and the biopsy needle punctures During operation, the insertion post on the inner needle hub 3 is inserted into the socket of the outer needle hub 5 .
  • Fig. 5 is a schematic structural diagram of a biopsy device provided by an embodiment of the present invention
  • Fig. 6 is an exploded view of the biopsy device provided by an embodiment of the present invention.
  • the biopsy device includes a power device 1, an inner needle assembly and an outer needle assembly, wherein the power device 1 is provided with a winding handle 2 and an activation button 7, and the inner needle assembly includes an inner needle 4 and an inner needle Needle seat 3, the inner needle needle seat 3 is fixedly connected with the side of the inner needle 4 away from the inner needle tip 43, the outer needle assembly includes an outer needle 6 and an outer needle needle seat 5, and the outer needle needle seat 56 and the outer needle away from the outer needle needle tip One side of 62 is fixedly connected.
  • the biopsy device When the biopsy device is in use, install the disposable biopsy needle in the power device 1, and then press the winding handle 2 to a limited position along the opposite direction of the inner needle tip 43. After a "click” sound is heard, it indicates that the outer needle 6 has been After reaching the limit position, release the winding handle, and then press the winding button 2 to the limit position along the opposite direction of the inner needle tip 43 again. After hearing a "click” sound, it indicates that the inner needle 4 has reached the limit position. In this state, the spring in the winding handle 2 is compressed, and the inner and outer needles are in a state to be activated.
  • the biopsy needle provided by the embodiment of the present invention is provided with an adhesive limiting structure and an inverted buckle structure, which can avoid inertial displacement of the inner needle and the outer needle due to their high-speed motion, and can avoid the separation of the inner needle and the inner needle needle seat, thereby
  • the position of the inner needle and the outer needle is precisely matched, and the excitation range is accurate, so that the position of the lesion can be accurately reached according to the position set by the surgeon, and the personal safety of medical staff and patients can be protected.

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Abstract

一种活检针及活检装置，该活检针包括内针（4）、与内针（4）连接的内针针座（3）、外针（6）和与外针（6）连接的外针针座（5），内针（4）与内针针座（3）之间、外针（6）与外针针座（5）之间设有粘接限位结构；通过粘接限位结构限制内针（4）与内针针座（3）之间、外针（6）与外针针座（5）之间产生相对移动。在针体与针座之间增加粘接限位结构，通过粘接限位结构使针体与针座连接的更加牢固，使得活检针具有结构安全、可靠、稳定的特性。

Description

一种活检针及活检装置 技术领域
本发明涉及穿刺设备技术领域，特别地涉及一种活检针及活检装置。
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，因此，对组织肿瘤进行尽早正确的诊断有着重要的意义。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。
病人的任何部位的穿刺活检，如前列腺、肾脏、肝脏、脾脏、乳腺等组织，手术过程中使用的主要取样器械为活检针，一种合格的活检针，最基本的要求是定位准确，手术安全，从而可以使手术可以成功的进行，对病人及手术过程中医护人员的安全获得保障。
活检装置是目前常用的穿刺活检用设备，医生从包装盒中取出一次性使用活检针，并安装在活检装置中，上弦后，由于内、外针储存的能量较大(能量为弹簧被压缩后的回弹力)，激发后，内、外针的释放速度较快，在惯性的作用下，内、外针到达限定位置后，会有继续向前移动的趋势。如果针体和针座之间的连接不牢固，在惯性力作用下，针体会相对针座产生位移，进而无法进行精准取样，严重时，可能导致针体飞出，给病人和医护人员的安全带来一定的危害。
发明内容
本发明提供了一种活检针及活检装置，在针体与针座之间增加粘接限位结构，粘接限位结构能够避免针体与针座之间产生相对位移或分离，进而使内针和外针位置配合精准，以及使用时更加安全可靠。
本发明的一个方面，提供了一种活检针，包括内针、与内针连接的内针针座、外针和与外针连接的外针针座，内针与内针针座之间、外针与外针针座之间设有粘接限位结构；通过粘接限位结构限制内针与内针针座之间、外针与外针针座之间产生相对移动。
可选地，内针针座包括用于容置内针的腔室，内针针座的外壁上设有与腔室贯通的第一穿孔，第一穿孔内填充有第一粘接结构，内针针座与内针通过第一粘接结构固定连接；外针针座包括贯穿外针针座的通孔，外针针座的外壁上设有与通孔贯通的第二穿孔，第二穿孔内填充有第二粘接结构，外针针座和外针通过第二粘接结构固定连接。
可选地，内针的外壁上设有凸起的倒扣结构，倒扣结构还内针针座和/或第一粘接结构内，或者，内针的外壁上设有内凹的倒扣结构，倒扣结构位于内针针座内，内针针座和/或第一粘接结构上设有用于插入倒扣结构的挡块。
可选地，外针的外壁上设有凸起的倒扣结构，倒扣结构与外针针座卡接。
可选地，内针与内针针座为一体结构，外针和外针针座为一体结构。
可选地，内针的外壁上设有凸起的倒扣结构，倒扣结构包括至少一条凸起棱。
可选地，倒扣结构包括多条凸起棱，多条凸起棱沿内针的圆周方向均匀布置。
可选地，内针的外壁上设有内凹的倒扣结构，倒扣结构为缺口。
可选地，缺口沿内针轴线方向具有设定宽度，并且缺口的深度不小于内针的半径。
可选地，倒扣结构包括呈圆台形的套筒，套筒的第一端与外针的尾端连接，并且第一端的外径与外针的外径相同，套筒第二端的外径大于第一端的外径；外针针座远离外针针尖的一端设有用于容置套筒的凹槽，凹槽的截面呈喇叭口状，套筒的外壁与凹槽的侧壁抵接。
本发明的另一个方面，还提供了一种活检装置，包括上述活检针。
本发明提供的技术方案中，在针体(包括内针和外针)与针座(包括内针针座和外针针座)之间增加粘接限位结构和倒扣结构，通过粘接限位结构和倒扣结构使针体与针座连接的更加牢固。
活检针使用时，粘接限位结构和倒扣结构可避免内针和外针因自身高速运动产生惯性位移，以及可避免因内针与内针针座分离，从而使内针和外针位置配合精准，激发射程精准，可以按照手术医生的设定位置，准确到达病灶位置，以及保护医护人员及病人的人身安全。本发明提供的技术方案中，活检针具有结构安全、可靠、稳定的特性。
附图说明
为了说明而非限制的目的，现在将根据本发明的优选实施例、特别是参考附图来描述本发明，其中：
图1是本发明实施方式提供的活检针的剖视图；
图2是本发明实施方式提供的活检针中内针上一种倒扣结构的示意图；
图3是本发明实施方式提供的活检针中内针上另一种倒扣结构的示意图；
图4是本发明实施方式提供的活检针中外针上一种倒扣结构的示意图；
图5是本发明实施方式提供的活检装置的结构示意图；
图6是本发明实施方式提供的活检装置的爆炸图。
图中：
1：动力装置；2：上弦把手；3：内针针座；4：内针；5：外针针座；6：外针；7：激发按钮；81：第一粘接结构；82：第二粘接结构；41：缺口；42：凸起棱；43：内针针尖；61：套筒；62：外针针尖。
具体实施方式
下面结合附图和实施方式对本申请作进一步的详细说明。可以理解的是，此处所描述的具体实施方式仅用于解释相关内容，而非对本申请的限制。为简明起见，在本申请各实施方式的描述中，对于相同或者类似的装置/方法步骤，使用相同或者相似的附图标记。
需要说明的是，在不冲突的情况下，本申请中的实施方式及实施方式中的特征可以相互组合。
图1是本发明实施方式提供的活检针的剖视图。如图1所示，活检针包括内针4、与内针4连接的内针针座3、外针6和与外针6连接的外针针座5，内针4与内针针座3之间、外针6与外针针座5之间设有粘接限位结构；通过粘接限位结构限制内针4与内针针座3之间、外针6与外针6座之间产生相对移动。
本发明实施方式中，内针4与内针针座3为一体结构，外针6和外针针座5为一体结构，其中，优选地，内针4与内针针座3、外针6与外针针座5采用一体注塑成型，采用注塑成型的结构，两者具有较强的连接强度。在此基础上，在针体与针座之间增加粘接限位结构，使得两者连接更加牢固。活检针使用时，粘接限位结构可进一步避免内针4和外针6因自身高速运动产生的惯性位移，可避免因内针4与内针4座分离，从而使内针4和外针6位置配合精准，激发射程精准，可以按照手术医生的设定位置，准确到达病灶位置，以及保护医护人员及病人的人身安全。本发明提供的技术方案中，活检针具有结构安全、可靠、稳定的特性。
如图1所示，内针针座3包括用于容置内针3的腔室，内针针座3的外壁上设有与腔室贯通的第一穿孔，第一穿孔内填充有第一粘接结构81，内针针座3与内针4通过第一粘接结构81固定连接；外针针座5包括贯穿外针针座5的通孔，外针针座5的外壁上设有与通孔贯通的第二穿孔，第二穿孔内填充有第二粘接结构82，外针针座5和外针6通过第二粘接结构82固定连接。第一粘接结构81和第二粘接结构82为固体胶水，第一穿孔和第二穿孔的底部具有一定的宽度，从而使第一粘接结构81与内针4的外壁、第二粘接结构82与外针6的外壁具有足够的粘接面积，以使两者连接牢固。
本发明实施方式中，还可通过设置倒扣结构的形式，增加针体与针座支架连接的稳定性，具体的，内针4的外壁上设有凸起的倒扣结构，倒扣结构插入内针针座3和/或第一粘接结构81内，或者，内针4的外壁上设有内凹的倒扣结构，倒扣结构位于内针针座3内，内针针座3和/或第一粘接结构81上设有用于插入倒扣结构的挡块。外针6的外壁上设有凸起的倒扣结构，倒扣结构与外针针座5卡接。内针4为实体结构，外针6为空心结构，因此，内针4上的倒扣结构可以为凸起结构，也可为内凹结构，而外针6上的倒扣结构则只为凸起结构。
图2是本发明实施方式提供的活检针中内针上一种倒扣结构的示意图。如图2所示，内针4的外壁上设有凸起的倒扣结构，倒扣结构包括至少一条凸起棱42。本发明实施方式中，倒扣结构包括多条凸起棱42，多条凸起棱42沿内针4的圆周方向均匀布置。凸起棱42扩大了内针4的外径，该部分结构插入到内针针座3或插入第一粘接结构内，使内针4与内针针座3连接的更加牢固。
图3是本发明实施方式提供的活检针中内针上另一种倒扣结构的示意图。如图3所示，内针4的外壁上设有内凹的倒扣结构，倒扣结构为缺口41，缺口41沿内针4轴线方向具有设定宽度，并且缺口41的深度不小于 内针4的半径。内针针座3或第一粘接结构81上设有凸起的挡块，该挡块插入到缺口41内，从而形成牢固的限位结构。
图4是本发明实施方式提供的活检针中外针上一种倒扣结构的示意图。如图4所示，倒扣结构包括呈圆台形的套筒61，套筒61的第一端与外针6的尾端连接，并且第一端的外径与外针6的外径相同，套筒61第二端的外径大于第一端的外径；外针针座5远离外针6针尖的一端设有用于容置套筒61的凹槽，凹槽的截面呈喇叭口状，套筒61的外壁与凹槽的侧壁抵接。倒扣结构设置为圆台形结构，既能起限位作用，另外，还可适当增大外针6的管径，方便内针4的插入操作。除采用上述圆台形倒扣结构以外，外针的外壁上，也可采用凸起的倒扣结构，该倒扣结构插入外针针座或第二粘接结构内。
如图1所示，在外针针座5的末端设有沿外针6轴线方向延伸的插口，在内针针座3的前端设有沿内针4轴线方向延伸的插接柱，活检针穿刺操作时，内针针座3上的插接柱插入外针针座5的插口内。
图5是本发明实施方式提供的活检装置的结构示意图；图6是本发明实施方式提供的活检装置的爆炸图。如图5和图6所示，活检装置包括动力装置1、内针组件和外针组件，其中，动力装置1上设有上弦把手2和激发按钮7，内针组件包括内针4和内针针座3，内针针座3与内针4远离内针针尖43的一侧固定连接，外针组件包括外针6和外针针座5，外针针座56与外针远离外针针尖62的一侧固定连接。
活检装置使用时，将一次性使用的活检针安装在动力装置1中，然后沿着内针针尖43相反方向按压上弦把手2至限定位置，听到“咔嗒”声后，表明外针6已经到达限定位置，松开上弦把手，然后再次沿着内针针尖43相反方向按压上弦按钮2至限定位置，听到“咔嗒”声后，表明内针4到达限定位置。此状态下，上弦把手2中的弹簧受到压缩，内、外针处于待激发状态。
在超声影像设备的指引下，确定需穿刺的位置，此时推动激发按钮7，内、外针得到释放，在弹簧回弹力的作用下带动活检针往病灶区域快速前进，内、外针间隔进入病灶，最终，活检针的内针取样槽内取得一定的组织样本，将组织样条取出置于指定器皿内，完成一次活检操作。
本发明实施方式提供的活检针中设有粘接限位结构和倒扣结构，可避免内针和外针因自身高速运动产生惯性位移，以及可避免因内针与内针针座分离，从而使内针和外针位置配合精准，激发射程精准，可以按照手术医生的设定位置，准确到达病灶位置，以及保护医护人员及病人的人身安全。
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. 一种活检针，包括内针(4)、与内针(4)连接的内针针座(3)、外针(6)和与外针(6)连接的外针针座(5)，其特征在于，内针(4)与内针针座(3)之间、外针(6)与外针针座(5)之间设有粘接限位结构；
    通过粘接限位结构限制内针(4)与内针针座(3)之间、外针(6)与外针针座(5)之间产生相对移动。
  2. 根据权利要求1所述的活检针，其特征在于，内针针座(3)包括用于容置内针的腔室，内针针座(3)的外壁上设有与腔室贯通的第一穿孔，第一穿孔内填充有第一粘接结构(81)，内针针座(3)与内针(4)通过第一粘接结构(81)固定连接；
    外针针座(5)包括贯穿外针针座(5)的通孔，外针针座(5)的外壁上设有与通孔贯通的第二穿孔，第二穿孔内填充有第二粘接结构(82)，外针针座(5)和外针(6)通过第二粘接结构(82)固定连接。
  3. 根据权利要求2所述的活检针，其特征在于，内针(4)的外壁上设有凸起的倒扣结构，倒扣结构插入内针针座(3)和/或第一粘接结构(81)内，或者，内针(4)的外壁上设有内凹的倒扣结构，倒扣结构位于内针针座(3)内，内针针座(3)和/或第一粘接结构(81)上设有用于插入倒扣结构的挡块。
  4. 根据权利要求3所述的活检针，其特征在于，外针(6)的外壁上设有凸起的倒扣结构，倒扣结构与外针针座(5)卡接。
  5. 根据权利要求3所述的活检针，其特征在于，内针(4)的外壁上设有凸起的倒扣结构，倒扣结构包括至少一条凸起棱(42)。
  6. 根据权利要求5所述的活检针，其特征在于，倒扣结构包括多条 凸起棱(42)，多条凸起棱(42)沿内针(4)的圆周方向均匀布置。
  7. 根据权利要求3所述的活检针，其特征在于，内针(4)的外壁上设有内凹的倒扣结构，倒扣结构为缺口(41)。
  8. 根据权利要求7所述的活检针，其特征在于，缺口(41)沿内针(4)轴线方向具有设定宽度，并且缺口(41)的深度不小于内针(4)的半径。
  9. 根据权利要求4所述的活检针，其特征在于，倒扣结构包括呈圆台形的套筒(61)，套筒(61)的第一端与外针(6)的尾端连接，并且第一端的外径与外针(6)的外径相同，套筒(61)第二端的外径大于第一端的外径；
    外针针座(5)远离外针(6)针尖的一端设有用于容置套筒的凹槽，凹槽的截面呈喇叭口状，套筒(61)的外壁与凹槽的侧壁抵接。
  10. 一种活检装置，其特征在于，包括如权利要求1至9中任一项所述的活检针。
PCT/CN2020/137767 2020-12-18 2020-12-18 一种活检针及活检装置 WO2022126652A1 (zh)

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CN103501846A (zh) * 2011-04-28 2014-01-08 泰尔茂株式会社 注射针组装体及药剂注射装置
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CN204033442U (zh) * 2014-01-27 2014-12-24 王宁 一种压力传感式无创穿刺针
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CN103501846A (zh) * 2011-04-28 2014-01-08 泰尔茂株式会社 注射针组装体及药剂注射装置
CN204033442U (zh) * 2014-01-27 2014-12-24 王宁 一种压力传感式无创穿刺针
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