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A fracture external fixator with adjustable axial pressure between bone fragments

An external fixator and pressure technology, applied in the direction of external fixator, fixator, etc., can solve the problem of inability to pressurize fracture fragments, and achieve the effects of increasing the stability of fixation, expanding the range of fixation, and reducing muscle atrophy.

Active Publication Date: 2021-07-13
王培林
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that when using the existing fracture fixation equipment to fix the fracture, it is often impossible to properly pressurize the fracture fragments

Method used

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  • A fracture external fixator with adjustable axial pressure between bone fragments
  • A fracture external fixator with adjustable axial pressure between bone fragments
  • A fracture external fixator with adjustable axial pressure between bone fragments

Examples

Experimental program
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Effect test

Embodiment Construction

[0029] In Embodiment 1, the main bracket 10 with the steel plate as the frame bar (two sections of steel plates are combined into an integral combined frame bar with a connecting device with a gas spring) is connected with screws 16, see figure 1 , Figure 5 , together constitute the external fixator. The steel plate is divided into two sections, respectively with the interface 1 of the connecting device and the plug 2 of the connecting device. The connecting device is formed after the plug and the interface are plugged together. The closed space in it is a pneumatic cylinder 3 filled with air. , the closed pneumatic cylinder 3 filled with air becomes an air spring device, through the charging hole 4, air can be filled or drawn out to change the elastic force of the air spring, through the charging hole (or another hole can be opened on the pneumatic cylinder) Connect the barometer to measure the gas pressure in the air chamber, and combine the cross-sectional area of ​​the g...

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Abstract

The invention relates to a fracture external fixator, in particular to a fracture external fixator with adjustable axial pressure between bone fragments, which belongs to the external fixation device for fracture treatment, and solves the problem of stably fixing fractures with existing fracture fixation devices. The problem that it is often impossible to properly pressurize the fracture fragments is characterized in that the frame rod of this external fixation frame is segmented, and one or both ends of each segment have plugs or interfaces; there are spring devices (metal springs) in the plugs or interfaces One or more of them, gas springs, elastic material pads), after plugging, they form a connection device that can adjust the axial pressure between the bone blocks, and through this connection device, the segmented rods are formed into an integral composite frame pole. By adjusting the elastic force of the whole spring device, it is possible to change the magnitude of the force exerted by the connecting device on the two-section frame rods on both sides in the direction of the long axis, thereby adjusting the axial pressure between the bone blocks. The present invention is used for fracture fixation. While stably fixing the fracture, it can avoid excessive stress shielding, and can realize flexible quantitative regulation of the axial pressure between the bone fragments, so that it is at a suitable level that meets the needs of fracture healing. Promote fracture healing.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to an external fracture external fixator with adjustable axial pressure between bone blocks. Background technique [0002] In the clinical treatment of fractures, it is necessary to reduce and fix the fractures, restore the anatomical relationship between the fracture fragments, rebuild the stability of the bones, and restore the physiological functions of the bones as human scaffolds; at the same time, it is necessary to provide a suitable biological environment for fracture healing, such as minimizing the impact on Destruction of soft tissue and periosteum, maintain sufficient blood circulation, and maintain moderate pressure between fracture fragments to promote fracture healing. Modern fracture treatment proposes a new concept of BO (Biological Osteosynthesis) on the basis of the AO principle. While paying attention to the mechanical properties of fracture ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/64A61B17/66
CPCA61B17/6441A61B17/645A61B17/6491A61B17/66
Inventor 王培林
Owner 王培林
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