技术领域technical field
本实用新型涉及骨科用医疗器械领域，具体是一种PFNA髓内钉。The utility model relates to the field of orthopedic medical instruments, in particular to a PFNA intramedullary nail.
背景技术Background technique
股骨转子间骨折是老年人的一种常见骨折。在临床上存在以下三个特点：一是患者多为高龄，全身情况差，并伴有多种内科合并症，在骨折后这些合并症往往都有加重，导致疾病治疗难度加大，病死率较高；二是骨质量，多有明确的骨质疏松，导致骨折固定可靠性降低；三是骨折类型多为粉碎不稳定性骨折，易发生术后髋内翻，头颈短缩及内固定失效、断裂。治疗上尽早外科手术固定已成共识，其关键是在骨折愈合前期提供一种坚强且稳定的桥连装置，使患者尽早下地活动，减少病死率。在对股骨近端骨折进行固定时，近端断裂段(主要是股骨头)必须对准股骨轴定向固定，即保持防位移和旋转固定。如何提供一种实现该功能的PFNA髓内钉，是本领域的技术难题。Intertrochanteric fracture is a common fracture in the elderly. Clinically, there are the following three characteristics: First, most patients are elderly, with poor general conditions, and a variety of medical complications. Second, bone quality, often with definite osteoporosis, leads to reduced reliability of fracture fixation; third, fracture types are mostly comminuted unstable fractures, prone to postoperative coxa varus, head and neck shortening and internal fixation failure, fracture. In terms of treatment, early surgical fixation has become a consensus. The key is to provide a strong and stable bridging device in the early stage of fracture healing, so that patients can get off the ground as soon as possible and reduce the mortality rate. When fixing proximal femoral fractures, the proximal fractured segment (mainly the femoral head) must be fixed in alignment with the femoral axis, that is, to maintain displacement and rotation-resistant fixation. How to provide a PFNA intramedullary nail that realizes this function is a technical problem in the art.
发明内容Contents of the invention
本实用新型要解决的问题是：克服现有技术的不足，提供一种结构简单，设计合理，钉体插入人体骨骼后，能够防止钉体位移和旋转，安全性和可靠性高，操作方便的PFNA髓内钉。The problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a simple structure, reasonable design, which can prevent the displacement and rotation of the nail body after the nail body is inserted into the human bone, has high safety and reliability, and is easy to operate. PFNA intramedullary nail.
为解决上述技术问题，本实用新型采用的技术方案是：一种PFNA髓内钉，包括主钉，靠近主钉的远端设有锁钉孔，所述锁钉孔内有锁钉穿过，靠近主钉的近端设有拉力螺钉孔，所述拉力螺钉孔内有PFNA螺旋刀片穿过，所述PFNA螺旋刀片的侧面对称设有四个限位槽，所述主钉的近端设有一PFNA盖帽和一防旋转装置，所述PFNA盖帽将防旋转装置固定于主钉的近端，所述主钉的近端设有四个滑槽，所述防旋转装置包括一圆形垫片，所述圆形垫片底部垂直设有四个限位板，所述限位板穿过滑槽并位于限位槽内。In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is: a PFNA intramedullary nail, including a main nail, a locking nail hole is provided near the far end of the main nail, and a locking nail passes through the locking nail hole. A lag screw hole is provided near the proximal end of the main nail, and a PFNA helical blade passes through the lag screw hole. The sides of the PFNA helical blade are symmetrically provided with four limiting grooves, and the proximal end of the main nail is provided with a PFNA cap and an anti-rotation device, the PFNA cap fixes the anti-rotation device on the proximal end of the main nail, the proximal end of the main nail is provided with four slide grooves, the anti-rotation device includes a circular spacer, The bottom of the circular spacer is vertically provided with four limiting plates, and the limiting plates pass through the slide groove and are located in the limiting groove.
进一步地，所述拉力螺钉孔与主钉的夹角为90°。Further, the included angle between the lag screw hole and the main nail is 90°.
进一步地，所述限位槽与PFNA螺旋刀片的轴向的夹角为90°。Further, the included angle between the limiting groove and the axial direction of the PFNA helical blade is 90°.
进一步地，所述拉力螺钉孔与主钉的夹角为55°。Further, the included angle between the lag screw hole and the main nail is 55°.
进一步地，所述限位槽与PFNA螺旋刀片的轴向的夹角为55°。Further, the included angle between the limiting groove and the axial direction of the PFNA helical blade is 55°.
进一步地，所述主钉的后端相对于其前端设置8-10°的前倾角。Further, the rear end of the main nail is set at an antegrade angle of 8-10° relative to its front end.
进一步地，所述主钉的材质为Ti-6Al-4V、Ti-6Al-7Nb或00Cr18Ni14Mo3。Further, the material of the main nail is Ti-6Al-4V, Ti-6Al-7Nb or 00Cr18Ni14Mo3.
进一步地，所述圆形垫片的中心有一圆孔，所述PFNA盖帽穿过圆孔，将垫片固定于主钉的近端。Further, there is a circular hole in the center of the circular gasket, and the PFNA cap passes through the circular hole to fix the gasket to the proximal end of the main nail.
本实用新型具有的优点和积极效果是：The advantages and positive effects that the utility model has are:
本实用新型结构简单，设计合理，钉体插入人体骨骼后，能够防止钉体位移和旋转，安全性和可靠性高，操作方便。The utility model has the advantages of simple structure and reasonable design. After the nail body is inserted into the human skeleton, the displacement and rotation of the nail body can be prevented, the safety and reliability are high, and the operation is convenient.
附图说明Description of drawings
图1是实施例一的主视图。Fig. 1 is the front view of Embodiment 1.
图2是实施例一的侧视图。Fig. 2 is a side view of Embodiment 1.
图3是实施例二的主视图。Fig. 3 is the front view of the second embodiment.
图4是实施例一的PFNA螺旋刀片的俯视图。Fig. 4 is a top view of the PFNA helical blade of the first embodiment.
图5是实施例一的PFNA螺旋刀片的主视图。Fig. 5 is a front view of the PFNA helical blade of the first embodiment.
图6是圆形垫片的俯视图。Figure 6 is a top view of a circular gasket.
图7是实施例一的主钉近端的俯视图。Fig. 7 is a top view of the proximal end of the main nail in the first embodiment.
图8是实施例二的PFNA螺旋刀片的俯视图。Fig. 8 is a top view of the PFNA helical blade of the second embodiment.
图9是实施例二的PFNA螺旋刀片的主视图。Fig. 9 is a front view of the PFNA helical blade of the second embodiment.
图中：1、主钉；2、锁钉孔；3、锁钉；4、拉力螺钉孔；5、PFNA螺旋刀片；6、限位槽；7、PFNA盖帽；8、滑槽；9、圆形垫片；10、限位板；11、圆孔。In the figure: 1. Main nail; 2. Locking nail hole; 3. Locking nail; 4. Lag screw hole; 5. PFNA helical blade; 6. Limiting groove; 7. PFNA cap; Shaped gasket; 10, limiting plate; 11, round hole.
具体实施方式Detailed ways
实施例一Embodiment one
如图1、2、4、5、6、7所示，一种PFNA髓内钉，包括主钉1，主钉1的材质为Ti-6Al-4V，主钉的后端相对于其前端设置9°的前倾角，靠近主钉1的远端设有锁钉孔2，锁钉孔2内有锁钉3穿过，靠近主钉1的近端设有拉力螺钉孔4，拉力螺钉孔4与主钉1的夹角为90°，拉力螺钉孔4内有PFNA螺旋刀片5穿过，PFNA螺旋刀片5的侧面对称设有四个限位槽6，限位槽6与PFNA螺旋刀片5的轴向的夹角为90°，主钉1的近端设有一PFNA盖帽7和一防旋转装置，PFNA盖帽7将防旋转装置固定于主钉1的近端，主钉1的近端设有四个滑槽8，防旋转装置包括一圆形垫片9，圆形垫片9底部垂直设有四个限位板10，限位板10穿过滑槽8并位于限位槽6内，圆形垫片9的中心有一圆孔11，PFNA盖帽7穿过圆孔11，将圆形垫片9固定于主钉1的近端。As shown in Figures 1, 2, 4, 5, 6, and 7, a PFNA intramedullary nail includes a main nail 1 made of Ti-6Al-4V, and the rear end of the main nail is set relative to its front end. The forward inclination angle is 9°, the far end near the main nail 1 is provided with a locking nail hole 2, and the locking nail 3 passes through the locking nail hole 2, and the near end of the main nail 1 is provided with a lag screw hole 4, and a lag screw hole 4 The included angle with the main nail 1 is 90°, the lag screw hole 4 has a PFNA helical blade 5 passing through, and the side of the PFNA helical blade 5 is symmetrically provided with four limiting grooves 6, and the limiting groove 6 and the PFNA helical blade 5 The included angle in the axial direction is 90°. The proximal end of the main nail 1 is provided with a PFNA cap 7 and an anti-rotation device. The PFNA cap 7 fixes the anti-rotation device on the proximal end of the main nail 1. The proximal end of the main nail 1 is provided with Four chutes 8, the anti-rotation device includes a circular gasket 9, the bottom of the circular gasket 9 is vertically provided with four limiting plates 10, the limiting plates 10 pass through the chute 8 and are located in the limiting groove 6, There is a circular hole 11 in the center of the circular spacer 9 , and the PFNA cap 7 passes through the circular hole 11 to fix the circular spacer 9 to the proximal end of the main nail 1 .
本实施例的工作过程：使用时，将主钉1旋入人体骨骼内，用锁定3和拉力螺钉4分别进行固定，为了防止拉力螺钉4位移和旋转，将防旋转装置的限位板10穿过滑槽8并位于限位槽6内，并用PFNA盖帽7穿过圆孔11，将圆形垫片9固定于主钉1的近端。本实用新型结构简单，设计合理，钉体1插入人体骨骼后，能够防止钉体1位移和旋转，安全性和可靠性高，操作方便。The working process of this embodiment: when in use, the main nail 1 is screwed into the human bone, fixed with the locking 3 and the lag screw 4 respectively, and in order to prevent the displacement and rotation of the lag screw 4, the limit plate 10 of the anti-rotation device is worn through Pass through the chute 8 and be located in the limiting groove 6, and use the PFNA cap 7 to pass through the round hole 11, and fix the circular washer 9 to the proximal end of the main nail 1. The utility model has simple structure and reasonable design. After the nail body 1 is inserted into the human skeleton, the displacement and rotation of the nail body 1 can be prevented, the safety and reliability are high, and the operation is convenient.
实施例二Embodiment two
如图3、6、8、9所示，一种PFNA髓内钉，包括主钉1，主钉1的材质为00Cr18Ni14Mo3，主钉的后端相对于其前端设置9°的前倾角，靠近主钉1的远端设有锁钉孔2，锁钉孔2内有锁钉3穿过，靠近主钉1的近端设有拉力螺钉孔4，拉力螺钉孔4与主钉1的夹角为55°，拉力螺钉孔4内有PFNA螺旋刀片5穿过，PFNA螺旋刀片5的侧面对称设有四个限位槽6，限位槽6与PFNA螺旋刀片5的轴向的夹角为55°，主钉1的近端设有一PFNA盖帽7和一防旋转装置，PFNA盖帽7将防旋转装置固定于主钉1的近端，主钉1的近端设有四个滑槽8，防旋转装置包括一圆形垫片9，圆形垫片9底部垂直设有四个限位板10，限位板10穿过滑槽8并位于限位槽6内，圆形垫片9的中心有一圆孔11，PFNA盖帽7穿过圆孔11，将圆形垫片9固定于主钉1的近端。As shown in Figures 3, 6, 8, and 9, a PFNA intramedullary nail includes a main nail 1. The material of the main nail 1 is 00Cr18Ni14Mo3. The far end of nail 1 is provided with locking nail hole 2, and locking nail 3 passes through in locking nail hole 2, is provided with lag screw hole 4 near the near end of main nail 1, and the angle between lag screw hole 4 and main nail 1 is 55°, the lag screw hole 4 has a PFNA helical blade 5 passing through, and the side of the PFNA helical blade 5 is symmetrically provided with four limiting grooves 6, and the included angle between the limiting groove 6 and the axial direction of the PFNA helical blade 5 is 55° , the proximal end of the main nail 1 is provided with a PFNA cap 7 and an anti-rotation device, the PFNA cap 7 fixes the anti-rotation device on the proximal end of the main nail 1, and the proximal end of the main nail 1 is provided with four slide grooves 8 for anti-rotation The device includes a circular spacer 9, and the bottom of the circular spacer 9 is vertically provided with four limiting plates 10, the limiting plates 10 pass through the chute 8 and are located in the limiting groove 6, and the center of the circular spacer 9 has a The round hole 11, through which the PFNA cap 7 passes, fixes the round washer 9 on the proximal end of the main nail 1.
本实施例的工作过程：同实施例一。The working process of the present embodiment: the same as embodiment one.
以上对本实用新型的实施例进行了详细说明，但所述内容仅为本实用新型的较佳实例，不能被认为用于限定本实用新型的实施范围。凡依本实用新型申请范围所作的均等变化与改进等，均应仍归属于本实用新型的专利涵盖范围之内。The embodiments of the present utility model have been described in detail above, but the content described is only a preferred example of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520457063.XUCN204814140U (en) | 2015-06-29 | 2015-06-29 | PFNA intramedullary nail |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520457063.XUCN204814140U (en) | 2015-06-29 | 2015-06-29 | PFNA intramedullary nail |
| Publication Number | Publication Date |
|---|---|
| CN204814140Utrue CN204814140U (en) | 2015-12-02 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520457063.XUExpired - LifetimeCN204814140U (en) | 2015-06-29 | 2015-06-29 | PFNA intramedullary nail |
| Country | Link |
|---|---|
| CN (1) | CN204814140U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887303A (en)* | 2015-06-29 | 2015-09-09 | 北京贝思达生物技术有限公司 | PFNA (proximal femoral nail anti-rotation) intramedullary nail |
| CN107440778A (en)* | 2017-08-30 | 2017-12-08 | 北京市富乐科技开发有限公司 | One kind interlocking anti-settling PFN |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104887303A (en)* | 2015-06-29 | 2015-09-09 | 北京贝思达生物技术有限公司 | PFNA (proximal femoral nail anti-rotation) intramedullary nail |
| CN107440778A (en)* | 2017-08-30 | 2017-12-08 | 北京市富乐科技开发有限公司 | One kind interlocking anti-settling PFN |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term | Granted publication date:20151202 |