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Intramedullary nail

A technology of intramedullary nails and nail rods, applied in the field of intramedullary nails, can solve the problems of complicated disassembly, easy infection, and many wounds, and achieve the effect of facilitating disassembly, less infection, and smaller wounds

Inactive Publication Date: 2019-10-08
ZHEJIANG HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides an intramedullary nail for the disadvantages of many wounds during installation, complicated disassembly, and easy infection in the prior art.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The intramedullary nail, as shown in the figure, includes a nail rod 1, which is a hollow rod body, and also includes an inner rod 2 extending into the hollow cavity of the nail rod 1, and one end of the nail rod 1 is defined as a fixed end and fixed on the bone On the other hand, the other end of the nail rod 1 is an expansion end and is provided with an expansion piece 3. There are at least two expansion pieces 3. The side of the expansion piece 3 close to the inner rod 2 is defined as its inner side. The inner side of the inner rod 2 and the expansion piece 3 Contact and stretch the expansion sheet 3 outward.

[0027] There are two expansion pieces 3 and they are arranged symmetrically about the axis of the nail shaft 1 . The expansion sheet 3 has elasticity. After the expansion sheet 3 is stretched by the inner rod 2, it can expand outwards and increase the diameter of the expansion end of the nail rod 1, and the stretched nail rod 1 can be installed in the bone mar...

Embodiment 2

[0036] Same as embodiment 1, the difference is that there are three expansion pieces 3 .

Embodiment 3

[0038] Same as Embodiment 1, the difference is that there are four expansion sheets 3 .

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PUM

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Abstract

The invention relates to the field of medical instruments, and discloses an intramedullary nail comprising a nail rod (1), the nail rod (1) is a hollow rod body, the intramedullary nail further comprises an inner rod (2) extending into the hollow inner cavity of the nail rod (1), one end of the nail rod (1) is defined as a fixed end and fixed on the bone, and the other end of the nail rod (1) is an expansion end and is provided with expansion pieces (3), The expansion pieces (3) have at least two pieces, the inner rod (2) is in contact with the inner side of the expansion piece (3) and the expansion piece (3) is outwardly extended; the number of the expansion pieces (3) is two, and the expansion pieces are axially symmetric arrangement relative to the nail rod (1); the expansion piece (3)comprises a lower part (31) and an upper part (32) which are connected to each other. The intramedullary nail of the invention has a simple structure, and the expanded end of the intramedullary nail can not only facilitate the installation of the intramedullary nail in the bone through the arrangement of the expansion pieces, but also facilitate the disassembly. In addition, the wound of the intramedullary nail is small, and the intramedullary nail is not easy to cause infection of the injured person.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to an intramedullary nail. Background technique [0002] Intramedullary nail is a commonly used intramedullary fixation device. Compared with other extramedullary fixation, it has the advantages of high strength, less trauma, and faster healing. In addition, intramedullary nails are ideal for reduction and fixation of fractures. A commonly used method for treating fractures is to insert an intramedullary nail through an opening at the end of the bone, and guide the insertion of the intramedullary nail. The intramedullary nail resets and fixes the broken bone along the physiological curvature of the medullary cavity. [0003] When the bones of the human body are fractured, intramedullary nails are usually used to connect the broken bones. Intramedullary nails generally refer to long steel nails placed in the bone marrow cavity. For example, for the femur and tibia of the lower lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/72
CPCA61B17/7258
Inventor 袁航杨永竤
Owner ZHEJIANG HOSPITAL