Limps extending device disposed inside medullar cavity

A technique for bone marrow cavity and limbs, which is applied in the field of limb extension devices, and can solve problems such as joint movement restriction, joint stiffness, infection, etc.

Inactive Publication Date: 2007-08-01
李 淳赫 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, in the case of using the existing external fixation device or the Ilizarov external fixation device in the limb lengthening operation, both of which include instruments that penetrate the skin and bone from the outside, infection will inevitably occur, and, in the case of penetrating the skin 8 Scars that cannot be removed by plastic surgery will also be left on the skin of the 20 steel wires, and the penetrating steel wires will pass through the muscles or cause pain, resulting in restriction of joint movement or induction of joint stiffness
[0023] In addition, generally speaking, it takes 3 to 12 months to extend the limbs, so it is necessary to install and use external fixation devices for a long time, which brings great inconvenience to daily life such as dressing

Method used

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  • Limps extending device disposed inside medullar cavity
  • Limps extending device disposed inside medullar cavity
  • Limps extending device disposed inside medullar cavity

Examples

Experimental program
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Embodiment Construction

[0032] 1 is a longitudinal sectional view showing a state in which a limb stretching device according to a preferred embodiment of the present invention is installed in a bone marrow cavity, and FIG. 2 is a longitudinal sectional view showing an operating state of the limbs stretching device according to a preferred embodiment of the present invention. Sectional view.

[0033] As shown in Figure 1 and Figure 2, the limb extension device involved in the preferred embodiment of the present invention includes: an upper component 21, a lower component 31, a screw rod 22, a nut 32, a motor 26, a controller 28, a wireless energy receiving part 29, an inverter Rotation preventing device 23, output shaft 24 and stopper 22a.

[0034] The upper member 21 is installed in the medullary cavity 11 of the bone 10 and has a hollow shape whose upper end is fixed in the bone 10 by the fixing mechanism 15 . Screws are preferably used for the fixing device 15, but are not limited thereto.

[00...

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Abstract

The invention discloses a limb stretching device, which comprises the following parts: hollow upper component (21), which is set in the marrow cavity (11) with upper end in the bone through fixing device (15); hollow lower component (31), which is set in the marrow cavity (11) with lower end fixed in the bone through fixing device (16) to connect upper component (21) glidingly; screw rod (22), which forms screw on the periphery; nut (32), which mates screw on the one of upper component (21) or lower component (32); motor (26), whose output shaft connects one end of screw rod (22).

Description

technical field [0001] The present invention relates to a limb extension device. In detail, it is used to stretch the length of the bone when the length of the lower limbs on both sides is inconsistent due to acquired reasons such as leg fractures and diseases, or various congenital reasons, or when the length of the lower limbs needs to be lengthened due to short stature due to illness. Limb extension device for limb lengthening surgery that also elongates soft tissue at the same time. Background technique [0002] Distraction osteogenesis, the basic concept of limb lengthening, was invented by Ilizarov of Russia. The principle of distraction osteogenesis is to use the Ilizarov external fixation device to firmly fix the bone, and use osteotomy (Osteotomy) to remove the bone in the middle part of the fixation. At this time, in order to minimize the damage of the periosteum, after 7 to 10 days after the osteotomy, the site where the osteotomy was performed is gradually stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F3/00
Inventor 李淳赫黄昌横宣卿郑基锡
Owner 李 淳赫
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