WO2017152859A1 - 髓内钉定位系统 - Google Patents

髓内钉定位系统 Download PDF

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Publication number
WO2017152859A1
WO2017152859A1 PCT/CN2017/076188 CN2017076188W WO2017152859A1 WO 2017152859 A1 WO2017152859 A1 WO 2017152859A1 CN 2017076188 W CN2017076188 W CN 2017076188W WO 2017152859 A1 WO2017152859 A1 WO 2017152859A1
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WO
WIPO (PCT)
Prior art keywords
positioning
intramedullary nail
hole
distal end
positioning rod
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PCT/CN2017/076188
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English (en)
French (fr)
Inventor
刘宇晗
严忠良
向愿
杨新星
刘茜茜
Original Assignee
武汉德骼拜尔外科植入物有限公司
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Application filed by 武汉德骼拜尔外科植入物有限公司 filed Critical 武汉德骼拜尔外科植入物有限公司
Publication of WO2017152859A1 publication Critical patent/WO2017152859A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/72—Intramedullary pins, nails or other devices

Definitions

  • the utility model relates to the field of medical instruments, in particular to an intramedullary nail positioning system for fracture treatment.
  • Intramedullary nail fixation has been widely used as an effective means for the treatment of internal fixation of fractures.
  • the development and production of intramedullary nail devices can promote the development of minimally invasive surgery, restore human physiology, and have a broad market in the field of orthopedics. prospect.
  • Each type of intramedullary nail device includes an intramedullary nail and an aiming positioning device and a universal surgical instrument corresponding to the intramedullary nail, which constitute an intramedullary nail positioning system.
  • the position of the locking nail hole on the intramedullary nail can be accurately determined by the assembled aiming positioning instrument during the operation to ensure the accuracy of the upper nail.
  • An existing intramedullary nail positioning system includes an intramedullary nail, a handle, a aiming frame, a positioning rod and a block.
  • the handle connects the proximal end of the intramedullary nail and the aiming frame, the positioning rod passes through the distal end of the aiming frame, abuts against the distal end of the intramedullary nail, and fixes the positioning rod and the aiming frame through the clamping block, thereby forming a closure Loop.
  • the components such as the block and the positioning rod matched with the intramedullary nail also need to be diversified, resulting in poor compatibility of the various components in the intramedullary nail positioning system, and the manufacturing cost of the device is high, and more The components also have the risk of easily matching errors.
  • An intramedullary nail positioning system comprising an intramedullary nail, a aiming frame, a handlebar, a positioning rod, a clamping block and a locking screw plug, the handlebar connecting the fixed intramedullary nail and the proximal end of the aiming frame, the positioning rod Passing through the distal end of the aiming frame and abutting against the distal end of the intramedullary nail, the block and the locking screw plug are respectively disposed on the positioning rod and respectively located on opposite sides of the aiming frame to fasten the positioning rod and a positioning platform, a positioning platform is disposed at a distal end of the intramedullary nail, a positioning hole is disposed in the positioning platform, and a distal end of the intramedullary nail is further provided with a locking hole, and the locking hole and the positioning hole extend in different directions.
  • a positioning portion is disposed at a distal end of the positioning rod, and an abutting portion is disposed adjacent to the positioning portion.
  • the positioning rod is further provided with a card slot, and the positioning portion of the positioning rod is received in the positioning hole, the positioning The abutting portion of the rod abuts against the positioning platform, the block is disposed at the card slot, and the distance between the center of the locking hole and the aiming frame is L, the center of the locking hole
  • the distance between the positioning platform is L1
  • the positioning hole is a threaded hole, and the outer surface of the positioning portion is provided with an external thread.
  • the positioning hole and the positioning portion have a cylindrical shape, a conical shape or a truncated cone shape.
  • the inclination angle of the conical shape or the truncated cone shape is 25 to 30 degrees.
  • the external thread provided on the outer surface of the positioning portion is composed of a conical thread and a straight thread, and the straight thread is disposed at a distal end of the positioning portion with respect to the conical thread.
  • a concave spherical surface or a concave tapered surface is formed at the distal end of the intramedullary nail, and the positioning platform is formed at the bottom of the concave spherical surface or the concave tapered surface.
  • the proximal ends of the intramedullary nail and the aiming frame are each provided with a connecting hole for fasteningly connecting with the handle.
  • the distal end of the aiming frame is further provided with a plurality of perforations for the positioning rod to pass through.
  • the block is an annular shape having an opening for snapping onto the positioning rod.
  • a step is provided in the opening of the block, and a step structure matching the step is disposed at the card slot.
  • the positioning rod is provided with an external thread for mating with the locking screw.
  • L1 is designed to be a fixed value, that is, L1 does not change according to the type and specification of the intramedullary nail, and since L2 can also be designed as a fixed value, L3 can also be determined. Value, thus the intramedullary nail positioning system, regardless of the size of the intramedullary nail, can use the same type of block to match, improve the compatibility of the components in the intramedullary nail positioning system, reduce the matching of each component The risk of error increases the success rate of surgery and promotes the recovery of human function.
  • FIG. 1 is a schematic structural view of an intramedullary nail positioning system according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the structure of a distal end portion of an intramedullary nail in the intramedullary nail positioning system shown in FIG. 1.
  • Fig. 3 is another perspective view of the structure of Fig. 2, partially broken away showing the internal structure.
  • FIG. 4 and 5 are structural schematic views of different viewing angles of the aiming frame in the intramedullary nail positioning system of FIG.
  • FIG. 6 is a schematic structural view of a positioning rod in the intramedullary nail positioning system shown in FIG. 1.
  • Figure 7 is a partial cross-sectional view of the clip in the intramedullary nail positioning system of Figure 1.
  • FIG. 8 is a schematic structural view of another view of the block shown in FIG. 7.
  • FIG. 8 is a schematic structural view of another view of the block shown in FIG. 7.
  • FIG. 9 is a schematic view showing the cooperation structure of the positioning rod and the block in the intramedullary nail positioning system shown in FIG. 1.
  • FIG. 9 is a schematic view showing the cooperation structure of the positioning rod and the block in the intramedullary nail positioning system shown in FIG. 1.
  • distal and proximal are conventional terms in the field of medical devices. Specifically, “distal” refers to the end away from the operator during the procedure, and “proximal” refers to the end near the operator during the procedure.
  • an intramedullary nail positioning system can be used for fracture treatment.
  • the intramedullary nail positioning system comprises an intramedullary nail 6, a aiming frame 2, a handlebar 1, a positioning rod 5, a clamping block 4 and a locking screw plug 3, wherein the intramedullary nail 6 is used for implanting a human body and fixing the fracture block To promote healing at the fracture site.
  • the handle 1, the aiming frame 2, the locking screw 3, the block 4 and the positioning rod 5 are used for cooperation with the intramedullary nail 6, so that the intramedullary nail 6 can be fixed in position.
  • a positioning platform 62 is disposed at the distal end of the intramedullary nail 6, a positioning hole 60 is defined in the positioning platform 62, and a distal end of the intramedullary nail 6 is further provided with a locking hole 61.
  • the keyhole 61 and the positioning hole 60 extend in different directions.
  • the axial extending direction of the locking hole 61 is perpendicular to the axial extending direction of the positioning hole 60.
  • the keyhole 61 is for connection with a locking bar (not shown) that connects the fixed intramedullary nails 6, so that the intramedullary nails 6 can be fixed in different dimensions.
  • the number of the lock holes 61 is plural.
  • the positioning hole 60 is a threaded hole, and the shape of the positioning hole 60 may be a cylindrical shape, a conical shape or a truncated cone shape.
  • a concave spherical surface or a concave tapered surface 601 is formed at the distal end of the intramedullary nail 6, and the positioning platform 62 is formed at the bottom of the concave spherical surface or the concave tapered surface 601.
  • an open recess is formed, a concave spherical surface or a concave tapered surface 601 is formed, and a positioning platform 62 is formed at the bottom of the concave spherical surface or the concave tapered surface 601, thereby reducing the residual material of the intramedullary nail 6 and improving The strength of the intramedullary nail 6.
  • the handle 1 is used to connect the proximal end of the fixed intramedullary nail 6 and the aiming frame 2.
  • the proximal end of the intramedullary nail 6 is provided with a connecting hole 63 for forming a fixed connection with the handlebar 1.
  • the proximal end of the aiming frame 2 is also provided with a connecting hole 22 for forming a fixed connection with the handlebar 1.
  • the distal end of the aiming frame 2 is provided with a plurality of through holes 21 for the positioning rod 5 to pass through.
  • the positioning rod 5 can be passed through the aiming frame 2 by selecting the perforation 21 at a suitable position according to the specifications of the engaged intramedullary nail 6.
  • the distal end of the aiming frame 2 is further provided with an auxiliary fixing hole 210.
  • the auxiliary fixing hole 210 is different from the extending direction of the through hole 21, and is used for a fastener (not shown) to pass through and fix the positioning rod disposed in the through hole 21. 5.
  • the positioning rod 5 passes through the distal end of the aiming frame 2 and abuts against the distal end of the intramedullary nail 6.
  • the proximal end of the positioning rod 5 is provided with an operating portion 50.
  • the distal end of the positioning rod 5 is provided with a positioning portion 51, and the abutting portion 52 is disposed adjacent to the positioning portion 51.
  • the size of the abutting portion 52 is larger than the positioning portion 51.
  • the outer surface of the positioning portion 51 may be provided with an external thread, and the positioning portion 51 is screwed into the positioning hole 60.
  • the positioning portion 51 can also have an outer shape such as a cylindrical shape, a conical shape or a truncated cone shape.
  • the inclination angle is 25 to 30 degrees.
  • the positioning portion 51 having the tip end allows the positioning rod 5 to have a certain swing angle, so that the positioning rod 5 can position the positioning hole 60 of the intramedullary nail 6 in the medullary cavity.
  • the external threads provided on the outer surface of the positioning portion 51 may be combined with a tapered thread and a straight thread.
  • a taper thread and a straight thread may be sequentially disposed from the near side and the far side; the straight thread may increase the number of turns of the positioning portion 51 and the positioning hole 60, thereby reinforcing the thread between the positioning portion 51 and the positioning hole 60.
  • the strength of the joint The design of the combined thread can increase the number of contact teeth and the number of turns, reducing the risk of failure of the thread on the positioning rod 5 due to the large force applied during the operation.
  • a card slot 53 is further disposed on the positioning rod 5, and the card block 4 is disposed at the card slot 53.
  • the block 4 and the locking screw 3 are both disposed on the positioning rod 5 and respectively located on opposite sides of the aiming frame 2 to fasten the positioning rod 5 and the aiming frame 2 .
  • L1 is designed to be a fixed value, that is, L1 does not change according to the change of the model and specification of the intramedullary nail 6, and since L2 can also be designed as a fixed value, L3 can also be set to a fixed value. Therefore, in the intramedullary nail positioning system, regardless of the specifications of the intramedullary nail 6, the same type of the card block 4 can be matched, thereby improving the compatibility of each component in the intramedullary nail positioning system and reducing the matching of the components. The risk of error increases the success rate of surgery and promotes the recovery of human function.
  • the block 4 is an annular shape having an opening 41 for snapping onto the positioning rod 5. Specifically, the opening 41 is snapped into the slot 53 of the positioning rod 5. Further, the block 4 is further provided with an auxiliary fastening hole 43.
  • the auxiliary fastening hole 43 communicates with the opening 41 and has a different extending direction for the fastener (not shown) to be worn and the positioning rod 5 to the top.
  • the positioning rod 5 is provided with an external thread 54 for engaging with the locking screw 3.
  • the intramedullary nail 6 and the aiming frame 2 are fixed to the handle 1 by fasteners such as bolts, inserted into the medullary cavity requiring fracture treatment, and then positioned through the aiming frame 2
  • the rod 5 the positioning portion 51 of the positioning rod 5 is aligned with the corresponding positioning hole 60 in the intramedullary nail 6, and is screwed. Pressing the positioning rod 5 again, inserting the block 4 from the lower side of the aiming frame 2, snapping onto the card slot 53 of the positioning rod 5, and finally tightening the locking screw 3 from the upper side of the aiming frame 2 to make the lock
  • the tightening screw 3 is fastened with the external thread 54 to complete the assembly of the intramedullary nail positioning system.
  • a step 42 is provided in the opening 41 of the block 4 .
  • the step structure 530 is also correspondingly disposed at the card slot 53 of the positioning rod 5.
  • the step 42 of the block 4 matches the step structure 530 of the positioning rod 5.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
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  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

一种髓内钉定位系统，包括髓内钉（6）、瞄准架（2）、手把（1）、定位杆（5）、卡块（4）和锁紧螺塞（3），髓内钉（6）的远端处设置定位平台（62）、锁孔（61），定位平台（62）内设定位孔（60），锁孔（61）和定位孔（60）沿不同方向延伸，定位杆（5）的远端设有定位部（51），邻近定位部（51）设有抵靠部（52），定位杆（5）上还设置卡槽（53），定位杆（5）的定位部（51）收容在定位孔（60）内，定位杆（5）的抵靠部（52）抵靠在定位平台（62）上，卡块（4）设置在卡槽（53）处，锁孔（61）的中心到瞄准架（2）之间的距离为L，锁孔（61）的中心到定位平台（62）之间的距离为L1，抵靠部（52）到卡槽（53）之间的距离为L2，卡块（4）的高度为L3，其中L＝L1+L2+L3，且L、L1、L2、L3均为定值。通过设置L1、L2、L3为定值，提升髓内钉定位系统各元件的兼容性，降低匹配错误的风险。

Description

髓内钉定位系统
【技术领域】
本实用新型涉及医疗器械领域，特别是涉及用于骨折治疗的髓内钉定位系统。
【背景技术】
髓内钉内固定术作为治疗骨折内固定的有效手段，已得到广泛应用，开发生产与之配套的髓内钉器械能促进微创手术的发展，恢复人体生理机能，在骨科领域具有广阔的市场前景。每类髓内钉器械均包括髓内钉以及与髓内钉对应的瞄准定位器械和通用手术器械，这些器械构成一个髓内钉定位系统。手术时通过装配好的瞄准定位器械可以找准髓内钉上的锁钉孔的位置，保证上钉的准确性。
现有的一种髓内钉定位系统，包括髓内钉、手把、瞄准架、定位杆和卡块。手把连接髓内钉和瞄准架的近端，定位杆穿过瞄准架的远端后抵顶在髓内钉的远端，并通过卡块使定位杆与瞄准架固定，由此形成一个闭合的环路。由于髓内钉的规格多样，与髓内钉匹配的卡块、定位杆等构件也需要多样化，导致髓内钉定位系统中的各个构件的兼容性较差，器械制造成本较高，而且多种构件还具有容易匹配出错的风险。
【发明内容】
基于此，有必要针对现有的髓内钉定位系统的兼容性差、容易匹配出错的问题，提供一种具有更高兼容性的髓内钉定位系统。
一种髓内钉定位系统，包括髓内钉、瞄准架、手把、定位杆、卡块和锁紧螺塞，所述手把连接固定髓内钉和瞄准架的近端，所述定位杆穿过瞄准架的远端并与髓内钉的远端抵顶，所述卡块和锁紧螺塞均设置在定位杆上并分别位于瞄准架的相对两侧以紧固所述定位杆与瞄准架，所述髓内钉的远端处设置一定位平台，定位平台内设定位孔，所述髓内钉的远端还设置锁孔，所述锁孔和定位孔沿不同方向延伸，所述定位杆的远端设有定位部，邻近所述定位部设有抵靠部，所述定位杆上还设置卡槽，所述定位杆的定位部收容在所述定位孔内，所述定位杆的抵靠部抵靠在所述定位平台上，所述卡块设置在所述卡槽处，所述锁孔的中心到所述瞄准架之间的距离为L，所述锁孔的中心到所述定位平台之间的距离为L1，所述抵靠部到所述卡槽之间的距离为L2，所述卡块的高度为L3，其中L=L1+L2+L3，且L、L1、L2、L3均为定值。
在其中一个实施例中，所述定位孔为螺纹孔，所述定位部外表面设置外螺纹。
在其中一个实施例中，所述定位孔和所述定位部呈圆柱形、圆锥形或圆台形。
在其中一个实施例中，所述定位孔和所述定位部呈圆锥形或圆台形时，圆锥形或圆台形的倾角为25~30°。
在其中一个实施例中，所述定位部外表面设置的外螺纹由圆锥螺纹和直螺纹构成，所述直螺纹相对于所述圆锥螺纹设置在所述定位部的远端。
在其中一个实施例中，所述髓内钉的远端处形成凹球面或者凹锥面，所述定位平台形成在凹球面或者凹锥面的底部。
在其中一个实施例中，所述髓内钉和瞄准架的近端均设有连接孔，用于与所述手把紧固连接。所述瞄准架的远端还设有多个穿孔，以供定位杆穿设通过。
在其中一个实施例中，所述卡块为具有开口的环状，所述开口用于卡设在所述定位杆上。
在其中一个实施例中，所述卡块的开口内设置台阶，所述卡槽处对应设置与台阶匹配的台阶结构。
在其中一个实施例中，所述定位杆上设置外螺纹，用于与所述锁紧螺塞配合。
上述髓内钉定位系统中，将L1设计为定值，也即L1不跟随髓内钉的型号与规格的变化而变化，同时由于L2也可设计为定值，由此可使得L3亦为定值，因而该髓内钉定位系统中，无论髓内钉采用何种规格，均可使用同一种卡块与之匹配，提升了髓内钉定位系统中各元件的兼容性，降低了各元件匹配错误的风险，从而提升手术成功率，促进人体机能的恢复。
【附图说明】
图1为本实用新型一实施例提供的髓内钉定位系统的结构示意图。
图2为图1所示髓内钉定位系统中的髓内钉的远端部分结构示意图。
图3为图2所示结构的另一视角示意图，其中部分剖开示出内部结构。
图4和图5为图1所示髓内钉定位系统中的瞄准架的不同视角的结构示意图。
图6为图1所示髓内钉定位系统中的定位杆的结构示意图。
图7为图1所示髓内钉定位系统中的卡块的部分剖视图。
图8为图7所示卡块的另一视角的结构示意图。
图9为图1所示髓内钉定位系统中的定位杆与卡块的配合结构示意图。
【具体实施方式】
为了更加清楚地描述髓内钉定位系统的结构，本实用新型限定术语“远端”和“近端”，上述术语为医疗器械领域的惯用术语。具体而言，“远端”表示手术过程中远离操作者的一端，“近端”表示手术过程中靠近操作者的一端。
如图1所示，本实用新型一实施例提供的髓内钉定位系统可用于骨折治疗。该髓内钉定位系统包括髓内钉6、瞄准架2、手把1、定位杆5、卡块4和锁紧螺塞3，其中髓内钉6用于植入人体并对骨折块进行固定以促进骨折处愈合。手把1、瞄准架2、锁紧螺塞3、卡块4和定位杆5等均用于与髓内钉6配合使用，使髓内钉6能固定在合适位置。
同时参考图2和图3，所述髓内钉6的远端处设置一定位平台62，定位平台62内设定位孔60，所述髓内钉6的远端还设置锁孔61，所述锁孔61和定位孔60沿不同方向延伸。在一实施例中，锁孔61的轴向延伸方向与定位孔60的轴向延伸方向垂直。
所述锁孔61用于与连接固定髓内钉6的锁杆（图未示）连接，使髓内钉6可在不同维度被固定。在一些实施例中，所述锁孔61的数量为多个。
在一些实施例中，所述定位孔60为螺纹孔，定位孔60的形状可以为圆柱形、圆锥形或圆台形等形状。
所述髓内钉6的远端处形成凹球面或者凹锥面601，所述定位平台62形成在凹球面或者凹锥面601的底部。相较于加工定位平台62形成敞口式的凹陷，形成凹球面或者凹锥面601，再在凹球面或者凹锥面601底部形成定位平台62，可减少髓内钉6的去除余料，提升髓内钉6的强度。
所述手把1用于连接固定髓内钉6和瞄准架2的近端。同时参考图1、图4和图5，所述髓内钉6的近端设有连接孔63，用于与所述手把1形成固定连接。瞄准架2的近端也设有连接孔22，用于与所述手把1形成固定连接。
所述瞄准架2的远端设有多个穿孔21，以供定位杆5穿设通过。可根据配合的髓内钉6的规格，选择合适位置的穿孔21使定位杆5穿设所述瞄准架2。
瞄准架2的远端还设置辅助固定孔210，辅助固定孔210与穿孔21的延伸方向不同，用于供紧固件（图未示）穿设并卡固穿设在穿孔21中的定位杆5。
同时参考图1和图6，所述定位杆5穿过瞄准架2的远端并与髓内钉6的远端抵顶。所述定位杆5的近端设有操作部50。所述定位杆5的远端设有定位部51，邻近所述定位部51设有抵靠部52。抵靠部52的尺寸比定位部51大。所述髓内钉定位系统装配时，手持操作部50，使所述定位杆5的定位部51收容在髓内钉6的所述定位孔60内，所述定位杆5的抵靠部52抵靠在髓内钉6的所述定位平台62上，使定位杆5对髓内钉6进行定位与固定。
进一步地，当定位孔60为螺纹孔时，所述定位部51外表面可设置外螺纹，并使定位部51旋进定位孔60内。相应地，所述定位部51也可为圆柱形、圆锥形或圆台形等外形形状。所述定位孔60和所述定位部51呈圆锥形或圆台形时，倾角为25~30°。具有尖端的定位部51可容许定位杆5约有一定的摆动角度，便于定位杆5在髓腔内找准髓内钉6的定位孔60。
在一些实施例中，定位部51的外表面设置的外螺纹可采用圆锥螺纹和直螺纹相组合的方式。可在定位部51的远端，由近及远依次设置圆锥螺纹和直螺纹；直螺纹可增加定位部51与定位孔60的旋合圈数，从而增强定位部51与定位孔60之间螺纹配合的连接强度。该组合螺纹的设计可增加接触齿数和旋合圈数，降低手术中因施力较大时导致定位杆5上螺纹失效的风险。
所述定位杆5上还设置卡槽53，所述卡块4设置在所述卡槽53处。所述髓内钉定位系统装配后，所述卡块4和锁紧螺塞3均设置在定位杆5上并分别位于瞄准架2的相对两侧以紧固所述定位杆5与瞄准架2。
如图1中所示，所述锁孔61的中心到所述瞄准架2之间的距离为L。由于器械尺寸链的要求，L的值是不变的，为一定值。所述锁孔61的中心到所述定位平台62之间的距离为L1。如图6中所示，所述抵靠部52到所述卡槽53之间的距离为L2。再回到图1，所述卡块4的高度为L3，其中L=L1+L2+L3。
本实用新型中，将L1设计为定值，也即L1不跟随髓内钉6的型号与规格的变化而变化，同时由于L2也可设计为定值，由此可使得L3亦为定值，因而该髓内钉定位系统中，无论髓内钉6采用何种规格，均可使用同一种卡块4与之匹配，提升了髓内钉定位系统中各元件的兼容性，降低了各元件匹配错误的风险，从而提升手术成功率，促进人体机能的恢复。
如图7、图8和图9中所示，在一些实施例中，所述卡块4为具有开口41的环状，所述开口41用于卡设在所述定位杆5上。具体地，所述开口41卡设在定位杆5的卡槽53中。进一步地，所述卡块4上还设有辅助紧固孔43，辅助紧固孔43与开口41连通，且延伸方向不同，用于供紧固件（图未示）穿设并与定位杆5抵顶。
进一步地，所述定位杆5上设置外螺纹54，用于与所述锁紧螺塞3配合。
在装配所述髓内钉定位系统时，髓内钉6与瞄准架2通过螺栓等紧固件固定在手把1上，插入需要骨折治疗的髓腔中，然后从瞄准架2上穿过定位杆5，定位杆5的定位部51对准髓内钉6上对应的定位孔60，并旋紧。再施力按下定位杆5，将卡块4从瞄准架2下方一侧插入，卡在定位杆5的卡槽53上，最后从瞄准架2上方一侧拧紧锁紧螺塞3，使锁紧螺塞3与外螺纹54紧固配合，完成髓内钉定位系统的装配。
进一步地，所述卡块4的开口41内设置台阶42。相对应地，在定位杆5的卡槽53处也对应设置台阶结构530，当卡块4卡设在卡槽53处时，卡块4的台阶42与定位杆5的台阶结构530相匹配。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本实用新型的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对实用新型专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本实用新型构思的前提下，还可以做出若干变形和改进，这些都属于本实用新型的保护范围。因此，本实用新型专利的保护范围应以所附权利要求为准。

Claims (10)

  1. 一种髓内钉定位系统，包括髓内钉、瞄准架、手把、定位杆、卡块和锁紧螺塞，所述手把连接固定髓内钉和瞄准架的近端，所述定位杆穿过瞄准架的远端并与髓内钉的远端抵顶，所述卡块和锁紧螺塞均设置在定位杆上并分别位于瞄准架的相对两侧以紧固所述定位杆与瞄准架，其特征在于，所述髓内钉的远端处设置一定位平台，定位平台内设定位孔，所述髓内钉的远端还设置锁孔，所述锁孔和定位孔沿不同方向延伸，所述定位杆的远端设有定位部，邻近所述定位部设有抵靠部，所述定位杆上还设置卡槽，所述定位杆的定位部收容在所述定位孔内，所述定位杆的抵靠部抵靠在所述定位平台上，所述卡块设置在所述卡槽处，所述锁孔的中心到所述瞄准架之间的距离为L，所述锁孔的中心到所述定位平台之间的距离为L1，所述抵靠部到所述卡槽之间的距离为L2，所述卡块的高度为L3，其中L=L1+L2+L3，且L、L1、L2、L3均为定值。
  2. 根据权利要求1所述的髓内钉定位系统，其特征在于，所述定位孔为螺纹孔，所述定位部外表面设置外螺纹。
  3. 根据权利要求2所述的髓内钉定位系统，其特征在于，所述定位孔和所述定位部呈圆柱形、圆锥形或圆台形。
  4. 根据权利要求2所述的髓内钉定位系统，其特征在于，所述定位孔和所述定位部呈圆锥形或圆台形，圆锥形或圆台形的倾角为25~30°。
  5. 根据权利要求2-4任一项所述的髓内钉定位系统，其特征在于，所述定位部外表面设置的外螺纹由圆锥螺纹和直螺纹构成，所述直螺纹相对于所述圆锥螺纹设置在所述定位部的远端。
  6. 根据权利要求1所述的髓内钉定位系统，其特征在于，所述髓内钉的远端处形成凹球面或者凹锥面，所述定位平台形成在凹球面或者凹锥面的底部。
  7. 根据权利要求1所述的髓内钉定位系统，其特征在于，所述髓内钉和瞄准架的近端均设有连接孔，用于与所述手把紧固连接；所述瞄准架的远端设有多个穿孔，以供定位杆穿设通过。
  8. 根据权利要求1所述的髓内钉定位系统，其特征在于，所述卡块为具有开口的环状，所述开口用于卡设在所述定位杆上。
  9. 根据权利要求8所述的髓内钉定位系统，其特征在于，所述卡块的开口内设置台阶，所述卡槽处对应设置与台阶匹配的台阶结构。
  10. 根据权利要求1所述的髓内钉定位系统，其特征在于，所述定位杆上设置外螺纹，用于与所述锁紧螺塞配合。
PCT/CN2017/076188 2016-03-10 2017-03-09 髓内钉定位系统 WO2017152859A1 (zh)

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