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Small-diameter bone fracture intramedullary fixing device

A fixation device and thin-diameter technology, applied in the direction of internal fixator, fixator, internal bone synthesis, etc., can solve the problems such as small fractures that do not apply to the bone cavity, and achieve the effect of preserving blood supply, reducing operation difficulty, and simple operation

Pending Publication Date: 2022-04-19
陈聚伍
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing ordinary intramedullary nails are only suitable for fracture operations with large bone cavity diameters, but not for small bone cavity fractures, the present invention provides a small-diameter bone fracture intramedullary fixation device for Intramedullary fixation for small slender bone fractures to reduce trauma and shorten rehabilitation period

Method used

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  • Small-diameter bone fracture intramedullary fixing device
  • Small-diameter bone fracture intramedullary fixing device
  • Small-diameter bone fracture intramedullary fixing device

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: A kind of small-diameter bone fracture intramedullary fixation device, its application status is as follows figure 1 As shown, the fixation device is installed in the inner cavity of the thin bone and is mainly designed for the problem that the existing common intramedullary nail is only suitable for fracture surgery with a large diameter of the bone cavity and is not suitable for the application of small fractures of the bone cavity. The device realizes the intramedullary fixation of the fracture of the slender bone 10 with a smaller inner diameter, and the wound only needs to expose the fracture end to achieve reduction, thereby achieving the purpose of minimally invasive.

[0030] A specific structure of an implementation of the device is as follows: figure 2 As shown, it can be seen that a sunken plane 2 is provided on the circumferential surface of the Kirschner wire 1. In this implementation, two sunken planes are respectively arranged at the two en...

Embodiment 2

[0038]Embodiment 2: Based on the structural features described in Embodiment 1, this embodiment further adds an arc-shaped hoop plate 6 on the basis of Embodiment 1, such as Figure 5 shown. Embodiment 1 plays a fixing role by screwing into the locking nail in the bone, but from Figure 5 It can be seen from the figure that for the weak bone wall area 7 of the thin-diameter bone, when the locking nail 4 is used in this place, the amount of engagement between the locking nail thread and the bone part is small, so that the firmness becomes weaker. To solve this problem, an arc-shaped hoop plate 6, Figure 5 It can be seen from the figure that the arc-shaped hoop plate 6 is matched with the outer side of the bone wall. The arc-shaped hoop plate 6 itself has a certain rigidity. After selecting a suitable model and fitting it on the outer side of the bone wall, it can be firmly clamped on the bone wall.

[0039] A threaded hole 7 is provided on the side wall of the arc-shaped hoo...

Embodiment 3

[0042] Embodiment 3: On the basis of Embodiment 2, two screw holes are further added to the arc-shaped hoop plate 6 and corresponding locking nails are respectively assembled.

[0043] One way of doing this is as Figure 7 As shown, the two screw holes are adjacently distributed, so that after the two locking nails are installed, the inner ends of the two adjacent locking nails can be supported in the concave plane that can be pointed.

[0044] Another implementation is as Figure 8 As shown, the two screw holes are relatively distributed. After the two locking screws are installed, one locking screw is supported on the back of the Kirschner wire, and the other is supported in the concave plane on the front of the Kirschner wire, which can still form a stable structure.

[0045] The above method of setting two or more screw holes on the arc-shaped hoop plate 6 and installing corresponding locking nails can improve the connection strength between the arc-shaped hoop plate 6 an...

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Abstract

The invention discloses a small-diameter bone fracture intramedullary fixing device which comprises a kirschner wire and locking nails, concave planes are arranged on the circumferential faces of the two ends of the kirschner wire respectively, the small-diameter bone fracture intramedullary fixing device further comprises at least one pair of locking nails, an external thread is arranged on a rod body of each locking nail, the inner end face of each locking nail is a plane, and the inner end plane of each locking nail is matched with the concave plane of the side face of the kirschner wire. And the components can be pressed together in a surface contact manner. The intramedullary nail can be suitable for fixing long and thin bone fractures with small bone cavity inner diameters, and compared with a traditional operation of aiming at a lock hole through an intramedullary nail, the mode is easy to operate and minimally invasive. During aiming and fixing, only axial locking is needed, radial moderate deflection is allowed, the using effect is not affected, and therefore the operation difficulty is lowered.

Description

technical field [0001] The invention belongs to the technical field of fracture fixation devices, and in particular relates to a small-diameter bone fracture intramedullary fixation device. Background technique [0002] Fracture internal fixation methods include steel plates and intramedullary nails. Plate 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, and postoperative scars are large. , affects the appearance, does not conform to the minimally invasive principle, the intramedullary nail adopts closed and minimally invasive technology, and the interlocking intramedullary nail can prevent fracture rotation deformity and reduce the risk of implant fracture; reduce the surgical infection rate; promote a high rate of fracture healing ; Central fixation avoids the effect of stress shieldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/72A61B17/76
CPCA61B17/725A61B17/7291A61B17/74
Inventor 陈聚伍
Owner 陈聚伍
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