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Elastic stress locking intramedullary nail for bone fracture intenral fixing

A technology of elastic stress and intramedullary nailing, which is applied in the field of medical devices, can solve the problems of increasing patient pain and prolonging the fracture healing period, and achieve the effects of shortening the fracture healing period, promoting fracture healing and reducing pain

Inactive Publication Date: 2005-01-26
冀原
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interlocking intramedullary nail is statically fixed by a static nail with an integrated structure, which limits the axial pressure and stimulation of the fracture segment, and there is a certain stress shielding, which prolongs the fracture healing period
In addition, taking out the static nail to promote fracture healing during the fracture healing process will inevitably increase the pain of the patient and is not accepted by the patient.

Method used

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  • Elastic stress locking intramedullary nail for bone fracture intenral fixing
  • Elastic stress locking intramedullary nail for bone fracture intenral fixing

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing and preferred embodiment, specific structure according to the present invention is described in further detail:

[0010] See figure 1 As shown, an elastic and dynamic interlocking intramedullary nail is decomposed from the static nail of the original integrated structure into a static nail 2, a dynamic nail 5, an elastic element 3, and a cylindrical pin 4, which are spring elastic elements 3 and cylindrical pin 4 are separately installed in the blind hole at the end of the static nail 2, and the exposed end of the cylindrical pin 4 is statically fitted in the inner hole of the dynamic nail 5. The above-mentioned static nail 2 is provided with a locking pin elongated hole 6 for positioning the cylindrical pin 4, and the locking pin 7 is inserted in the elongated hole and the cylindrical pin positioning hole, and the cylindrical pin can be installed in the long hole along with the locking pin. Move in the hole. The tail of ...

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Abstract

The present invention relates to medical equipment, and is especially one tubular intramedullary nail for fixing bone fracture. It consists of static nail, dynamic nail, elastic element and cylindrical pin, the elastic element and the cylindrical pin are mounted separately in the blind hole in the end of the static nail, and the cylindrical pin is mounted inside the hole in the dynamic nail in interference fit. The structure has the obvious advantages of constantly existing elastically axial pressurizing effect and stimulating effect on the fracture section produced during fixing the fracture and thus short fracture healing period and less pain of the patient.

Description

technical field [0001] The invention belongs to medical instruments, in particular to an improvement of an interlocking intramedullary nail for tubular bone fractures. Background technique [0002] Tubular bone fractures in traumatic fractures are common fracture conditions, and delayed union, nonunion, or malunion of fractures are prone to occur if improperly treated. For a long time, interlocking intramedullary nails have been used in the clinical treatment of tubular bone fractures for positioning and healing. Although intramedullary fixation conforms to the theory of biomechanics, it is firmly fixed and can be used for early functional exercise, early weight bearing, prevention of bone shortening, and avoidance of axial and rotational deformities of fractures. However, the interlocking intramedullary nail is statically fixed by a static nail with an integrated structure, which limits the axial pressure and stimulation of the fracture segment, and there is a certain stre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/72A61B17/86
Inventor 冀原
Owner 冀原
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