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Proximal femoral nail extractor

A proximal femur and intramedullary nailing technology, applied in the field of medical devices, can solve the problems of no special extractor, etc., and achieve the effects of avoiding troublesome use, convenient switching, and simple operation

Inactive Publication Date: 2019-09-17
AFFILIATED YONGCHUAN HOSPITAL OF CHONGQING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And currently there is no matching special extractor

Method used

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  • Proximal femoral nail extractor
  • Proximal femoral nail extractor
  • Proximal femoral nail extractor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Example: see Figure 4-10 , a proximal femur intramedullary nail extractor, which includes a handle rod 1, a U-shaped bracket 2, a square column 3, an external thread column 4, a jacket 5, an internal thread sleeve 6, a cylinder 7, an anti-rotation pin 8, a spring 9 and jacking screw 10.

[0028] The U-shaped bracket 2 is fixed on the first end of the handle 1, and the second end of the handle 1 is provided with a handle 1-1.

[0029] In this embodiment, the handle 1-1 adopts a T-shaped handle.

[0030] In this embodiment, the U-shaped bracket 2 is detachably fixed to the first end of the handle 1 .

[0031] Preferably, the U-shaped bracket 2 is provided with a sleeve portion 2-3 facing the handle 1, and the first end of the handle 1 is inserted into the sleeve 2-3. The sleeve portion 2-3 is also connected to the first end of the handle rod 1 through a locking assembly, the locking assembly includes a locking screw 11-1 and a locking nut 11-2, the locking screw 11-1 ...

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PUM

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Abstract

The invention discloses a proximal femoral nail extractor. The proximal femoral nail extractor is characterized by comprising a handle, a U-shaped support, a square column, an external thread column, a jacket, an internal thread sleeve, a round column, an anti-rotation pin, a spring and an ejecting screw, the U-shaped support is fixed to the first end of the handle, two rotating shaft parts are fixedly arranged on the left end face and the right end face of the square column and rotationally connected with the left side and the right side of the U-shaped support respectively, the external thread column, the jacket, the internal thread sleeve and the round column are fixedly arranged on the four side wall faces of the square column respectively, four pin holes are formed in the left end face of the square column, the right end of the anti-rotation pin can be inserted in one pin hole, an inner blocking platform is arranged on the outer wall of the middle of the anti-rotation pin, and the left end of the anti-rotation pin sequentially penetrates through the spring and the left side of the U-shaped support to be fixedly connected with an outer blocking platform. The proximal femoral nail extractor can be used for extracting a lag screw or / and a lock pin when an accident (such as screw sliding or nail breaking) happens to a proximal femoral nail.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a proximal femoral intramedullary nail remover. Background technique [0002] The proximal femoral nail (PFNA) is a kind of proximal femoral nail that can quickly and accurately implant lag screws along the anteversion direction of the femoral neck. see figure 1 , the proximal femoral nail (PFNA) includes a main nail (a), a lag screw (b) and a locking nail (c). The main nail is provided with a lag screw hole and a locking nail hole, and the lag screw hole is provided with an anteversion angle. And the included angle α between the axis of the lag screw hole and the coronal plane is 8°-18°. [0003] see Figure 1-3 , wherein there is a lag screw (b), the lag screw (b) includes a helical blade (b-1), a sleeve (b-2) and a tail cap (b-3). The helical blade has a rod and a helical part, the sleeve is overlaid on the rod, and the inner end of the end cap is inserted into...

Claims

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Application Information

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IPC IPC(8): A61B17/92
CPCA61B17/921
Inventor 周容杨全刘丹陈代鸿
Owner AFFILIATED YONGCHUAN HOSPITAL OF CHONGQING MEDICAL UNIV
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