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Automatically opening internal fixator for reduction of calcaneal fracture

An internal fixator and calcaneal fracture technology, which is applied in the field of medical devices, can solve the problems of large damage and large wound in bone graft surgery, and achieve the effects of pain relief, short operation time and simple structure

Inactive Publication Date: 2010-11-24
SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has always been controversy over bone graft materials. Various bone graft materials have certain limitations, and bone graft surgery has a large wound. If autologous bone is taken, it will cause greater damage to the patient.

Method used

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  • Automatically opening internal fixator for reduction of calcaneal fracture
  • Automatically opening internal fixator for reduction of calcaneal fracture
  • Automatically opening internal fixator for reduction of calcaneal fracture

Examples

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Embodiment 1

[0013] Embodiment 1. A kind of automatic distraction internal fixator for calcaneus fracture reduction

[0014] The length of the major axis of the spindle body 1 of the present invention is 16 mm, the length of the minor axis is 8 mm, and the angle between the two ends and the highest point in the middle is 45 degrees; the length of the fixed end 2 is 4 mm, and the diameter is 1.5 mm.

Embodiment 2

[0015] Embodiment 2. A kind of automatic distraction internal fixator for calcaneal fracture reduction

[0016] The length of the major axis of the spindle body 1 of the present invention is 24 mm, the length of the minor axis is 14 mm, and the angle between the two ends and the highest point in the middle is 35 degrees; the length of the fixed end 2 is 6 mm, and the diameter is 2 mm.

[0017] The present invention can be made into different specifications and models as required.

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Abstract

The invention relates to the technical field of medical apparatuses and instruments, in particular to an automatically opening internal fixator made of a nickel titanium shape memory alloy and used for treating the reduction of calcaneal fracture. The fixator is in a hollow spindle shape and is wound by a nickel titanium shape memory alloy wire. The fixator comprises two parts, namely the spindle (1) and fixing ends (2) at two ends of the spindle; and the flexibility of the spindle (1) is matched with that of normal tubercle joint angle. The fixator has the advantages of simple structure, convenient operation, short operation time, and capacity of reducing radiation injury of X rays to patients and medical care personnel, does not need bone graft, really realizes minimally invasive, is favorable for wound healing, relieves the pain of the patients, has high support strength of the nickel titanium alloy and good tissue compatibility, and can play a role in continuously supporting.

Description

technical field [0001] The invention relates to the technical field of medical devices, and relates to an automatic distraction internal fixator made of nickel-titanium shape memory alloy for treating calcaneal fracture reduction. Background technique [0002] Calcaneal fracture is a kind of fracture that is difficult to handle, especially the fracture involving the calcaneal articular surface. Since the calcaneal body is cancellous bone, the mechanism of fracture injury is mostly caused by vertical violence, which often causes the fracture site to collapse. Obvious areas of bony defect often occur, and it is difficult to restore and maintain the tuberosity angle of the calcaneus. There are different opinions on whether bone transplantation or artificial bone replacement is needed. Most people think that the calcaneus is dominated by cancellous bone, has rich blood circulation, and has strong regeneration ability. The bone defect is often sparse in bone itself. In the neutr...

Claims

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Application Information

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IPC IPC(8): A61B17/68A61L31/02
Inventor 禹宝庆毛宁方
Owner SECOND MILITARY MEDICAL UNIV OF THE PEOPLES LIBERATION ARMY
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