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Intramedullary pin

A technology of intramedullary nails and sliders, applied in the field of intramedullary nails, can solve problems that are not easy to be controlled, not without defects, etc.

Inactive Publication Date: 2015-05-13
NILIDER PHARM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, this type of intramedullary nail, while solving the problems related to the distal anchoring of the nail, is not without its drawbacks
[0012] Firstly, if any positioning problems arise during the application of the staples after removal of said fixation device, the situation is irreversible
[0013] Secondly, since the rods have a significant length and are fixed to the nail heads only at their proximal ends, the torque experienced by the distal ends of the rods when the rods are released is significant and not easily controlled
[0014] Finally, the aforementioned intramedullary nail cannot be inserted into the bone with the aid of a guide wire, since the central longitudinal part of the nail is already occupied by the tool manipulated to remove the fixation device

Method used

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Examples

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Embodiment Construction

[0029] refer to image 3 , shows the intramedullary nail 1 of the present invention.

[0030] Said intramedullary nail 1 comprises a head 3 at its proximal end, said head having a hole 5 serving as a means for fixing the nail to the proximal epiphysis of the fractured bone.

[0031] The nail 1 also comprises an elastically deformable bundle 7', a slightly curved stem 7 separated from the head 3 at its proximal end, the distal end 7a of said stem 7 being free. In the exemplary embodiment a total of five rods 7 are provided, but obviously the bundle 7' may comprise a different number of rods 7 .

[0032] The rod 7 preferably has a circular cross section and a surrounding distal end 7a.

[0033] The rods 7 are held radially next to each other by using suitable holding means.

[0034] Specifically, according to the invention, the retaining means of the intramedullary nail 1 comprises a slider 9 capable of sliding along the bundle 7' of the rods from their distal end 7a to their...

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PUM

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Abstract

The present invention refers to an intramedullary pin (1), particularly to an intramedullary pin with self-locking distal end that can be used for treating metadiaphyseal fractures of long bones such as the humerus. Advantageously, in the intramedullary pin (1) according to the invention the locking of the distal end can take place in a controlled and gradual, and also reversible, way. The structure of the intramedullary pin (1) according to the invention further allows to use a guide wire, whereby said pin can be inserted into the fractured bone with the aid of a guide wire.

Description

technical field [0001] The invention relates to an intramedullary nail. In particular, the present invention relates to an intramedullary nail for treating metaphyseal fractures of long bones such as the humerus. Background technique [0002] It is known to use intramedullary nails to treat metaphyseal fractures of long bones such as the humerus, ie fractures of the diaphysis (the middle part of the bone) that do not affect the proximal and distal epiphysis. [0003] In some known types of intramedullary nails, both ends of the nail need to be fixed to the fractured bone by means of screws, which involves a long and highly invasive surgical intervention. [0004] When the staples are removed, a long and highly invasive surgical intervention is also required. [0005] To overcome this drawback, previously developed intramedullary nails can be fixed to the bone at a single end (proximal end), while the opposite end (distal end) can be locked into the bone by itself. [0006...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/72
CPCA61B17/7208A61B17/7266A61B17/8872A61B17/921
Inventor 凯蒂娅·普契恩
Owner NILIDER PHARM CORP