Negative pressure therapeutic instrument for treating femoral head necrosis

A technology for femoral head necrosis and negative pressure therapy, which is applied in the direction of femoral head, drug devices, and other medical devices, can solve the problems of insufficient consideration of biomechanical factors, and achieve the effect of improving the biomechanical environment, ensuring safety, and good curative effect

Inactive Publication Date: 2008-02-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A common shortcoming of these treatments is insufficient consideration of biomechanical factors

Method used

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  • Negative pressure therapeutic instrument for treating femoral head necrosis
  • Negative pressure therapeutic instrument for treating femoral head necrosis
  • Negative pressure therapeutic instrument for treating femoral head necrosis

Examples

Experimental program
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Effect test

Embodiment approach

[0033] The polymer composite membrane is divided into an outer membrane and an inner membrane. The overall thickness is about 3-5 mm. It is prefabricated into a hollow cylindrical shape and implanted in the decompression area of ​​the femoral head. The manufacturing process of the membrane is shown in Figure 2.

[0034] 1. Prepare the outer semi-permeable membrane:

[0035] By grafting hydrophilic collagen molecules on hydrophobic PLGA molecules to endow them with amphiphilicity, it is used for the preparation of semipermeable membranes. Then select wood with a honeycomb pore diameter in the range of 10-200 μm, monodisperse and different pore shapes as a template, and transfer its honeycomb pore structure to biopolymer materials such as PLGA through controlled carbonization, vacuum / impregnation, etc. superior. The method of constructing semi-permeable membrane by wood template method is:

[0036] 1) Template hole structure design

[0037] According to the pore structure des...

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PUM

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Abstract

The present invention discloses a treatment instrument for vascular necrosis of femoral head, which at least comprises a composite membrane, a controlling system with a human-machine interface, a pressure controlling module and a storage liquid bottle. The composite membrane is used as the sealing material, which generates negative pressure. On one hand, effect of proper microenvironment for regeneration and repairing of the bone tissue provided by the composite membrane and effect of the growth factor are used. On the other hand, effect that negative pressure can promote osteocyte proliferation, improve growth of the selected cells, the growth factor and the vascular. A negative attraction is added in the composite membrane. The bone tissue regeneration can be induced by comprehensive utilization of the membrane and negative pressure. Therefore speed of bone tissue regeneration is increased. Modular design is applied in the treatment instrument. Each component is independent relatively. Three kinds of power supply modes are provided with under-voltage protection or over-voltage protection. The negative pressure pump and the pressure-reducing valve are automatically controlled by a pressure sensor monitoring with high accuracy and the micro controlling device. A series of operations comprising negative pressure arrangement and time arrangement are conducted by the keyboard conveniently. In addition, all the operation and data is displayed.

Description

technical field [0001] The invention belongs to medical equipment, and relates to a therapeutic instrument for avascular necrosis of the femoral head. Background technique [0002] Avascular necrosis of the femoral head has about 30 million patients in the world, and about 4 million people in my country, and it occurs in 31 to 60 years old. There are many treatment methods for adult femoral head necrosis to preserve the femoral head, which are divided into non-surgical therapy and surgical therapy. , bone grafting, bone grafting with blood supply, etc., most patients still need joint replacement in long-term follow-up. A common disadvantage of these treatments is insufficient consideration of biomechanical factors. The modern point of view on the treatment of avascular necrosis of the femoral head should focus on how to prevent long-term collapse, and consider the design of the operation method from the aspects of biology and biomechanics. Contents of the invention [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/56A61F5/00A61F2/36A61M31/00
Inventor 张银刚张宏
Owner XI AN JIAOTONG UNIV
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