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Built-in intramedullary fixing device

A fixation device and built-in technology, applied in the direction of internal fixator, fixator, internal bone synthesis, etc., can solve the problems of difficult operation, high fracture healing rate, frequent occurrence of broken nails and plates, etc., to achieve easy operation and easy learning , Small microcirculation damage, firm and stable effect

Pending Publication Date: 2019-02-19
陈聚伍
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Internal fixation methods for fractures are nothing more than steel plates and intramedullary nails. Plate internal fixation has the advantages of simple operation and short learning period, but the trauma is large, the probability of accidental injury is high, infection and nonunion, delayed union, broken nails and broken plates occur from time to time. The posterior scar is large, which affects the appearance and does not conform to the principle of minimally invasive. The intramedullary nail adopts closed and minimally invasive technology. The locking intramedullary nail can prevent the fracture rotation deformity and reduce the risk of fracture of the implant; reduce the surgical infection rate; promote fracture The healing rate is high; the central fixation avoids the effect of stress shielding, and the incidence of re-fracture is low; it conforms to the principle of minimal invasiveness and is the current development direction, but it is difficult to operate and learn, and it is difficult to lock the distal end of the intramedullary nail. However, none of them are anatomically reduced, non-union and delayed union may occur, and the pressure on the patient is high

Method used

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  • Built-in intramedullary fixing device
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  • Built-in intramedullary fixing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: as figure 1 The shown built-in intramedullary fixation device is suitable for the fixation of long and short tubular bone fractures of limbs, wherein the intramedullary support rod 1 can be installed in the medullary cavity 15 and can slide freely. The inner support rod is a smooth equal-diameter rod, and its two ends are smooth or have a taper to facilitate assembly. Such as Figure 6 As shown, in this embodiment, the intramedullary support rod 1 with a triangular cross-section is preferably used.

[0037] On the three sides of the main body of the intramedullary support rod 1 , a rack 3 is arranged in the middle of at least one side, and the rack 3 is parallel to the axial direction. At the same time, if figure 2 As shown, the radial screw holes 2 are uniformly distributed along the radial direction at equal intervals d in the region of the rack 3, and the centers of the radial screw holes 2 are located on the same generatrix.

[0038] When using th...

Embodiment 2

[0047] Embodiment 2: on the basis of embodiment 1, adopt such as image 3 and Figure 4 As shown in the positioning installation frame 4 , the main rod of the positioning installation frame 4 is parallel to the intramedullary support rod 1 . Positioning holes 8 are distributed at equal intervals d on the main rod of the positioning mounting frame 4, and the positioning holes 8 of the external positioning mounting frame 4 are used to determine the positions of the radial screw holes 2 on the built-in intramedullary support rod 1 .

[0048] Such as image 3 As shown, an initial positioning pin 5 is fixedly installed in one of the positioning holes 8 , and a side key 6 is provided on the side of the initial positioning pin 5 . At the same time, a keyway 7 is provided on the inner wall of at least one radial screw hole 2 of the intramedullary support rod 1 , the initial positioning pin 5 can be matched and inserted into the radial screw hole 2 , and the side key 6 and the keywa...

Embodiment 3

[0049] Embodiment 3: On the basis of Embodiment 1 or 2, the intramedullary support rod 1 is a variable prism type, see respectively Figure 5 The regular hexagonal prism shown, Figure 7 The square prism shown and Figure 8 Circular or semicircular prisms as shown. The prismatic design can especially adopt the triangular design, the ridgeline contact of the medullary cavity 15 is the most stable, the wall damage of the medullary cavity 15 is the least, and the microcirculation damage is the least. The intramedullary support rod 1 is fixed to the backbone through screws, and has the characteristics of firm and stable fixation.

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Abstract

The invention discloses a built-in intramedullary fixing device which comprises an intramedullary supporting rod which can be mounted in a medullary cavity. An intramedullary supporting rod body is atleast provided with a rack parallel to an axial direction, radial threaded holes are radially formed in the areas of the racks, radial locking nails are mounted in the radial threaded holes in a matched manner, and poking and moving knife tools can be connected with the racks in a clamped manner and are assembled in the radial threaded holes. The fixing device has advantages of an intramedullarynail and a steel plate and overcomes the shortcomings of the intramedullary nail and the steel plate. Reduction of fracture is achieved in a visual state, anatomical reduction can be achieved, soft tissue attachment of fracture blocks can be kept, blood supply is retained, the intramedullary supporting rod is implanted from the fracture end, operations are simple and easy, and the implanting orientation of the intramedullary supporting rod can be flexibly adjusted according to fracture types, so that screws are conveniently and additionally used for fixing fracture portions.

Description

technical field [0001] The invention belongs to the technical field of fracture fixation instruments, and in particular relates to a built-in intramedullary fixation device. Background technique [0002] Internal fixation methods for fractures are nothing more than steel plates and intramedullary nails. Plate internal fixation has the advantages of simple operation and short learning period, but the trauma is large, the probability of accidental injury is high, infection and nonunion, delayed union, broken nails and broken plates occur from time to time. The posterior scar is large, which affects the appearance and does not conform to the principle of minimally invasive. The intramedullary nail adopts closed and minimally invasive technology. The locking intramedullary nail can prevent the fracture rotation deformity and reduce the risk of fracture of the implant; reduce the surgical infection rate; promote fracture The healing rate is high; the central fixation avoids the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/72
CPCA61B17/7283A61B17/7291A61B2017/564
Inventor 陈聚伍
Owner 陈聚伍
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