External bone fixator

Details External bone fixator External bone fixator

A - Human Necessities

61

B

A61B 17/58 (2006.01) A61B 17/60 (2006.01) A61B 17/64 (2006.01)

Patent

CA 2175404

There is described an external fixator for use in the treatment of a fractured bone having a first bone fragment and a second bone fragment which external fixator comprises: means of attachment to the first bone fragment of the fractured bone; means of attachment to the second bone fragment of the fractured bone; a first rigid support bar having a first end and a second end, being connected to the first means of attachment at its first end and extending longitudinally therefrom; a second rigid support bar having a first end and a second end, being connected to the second means of attachment by its first end and extending longitudinally therefrom; a first movable element attached to the second end of the first support bar; a second movable element attached to the second end of the second support bar, wherein the first movable element is movably mounted in the fixator so as to be capable of angular motion in one plane, and the second movable element is movably mounted in the fixator so as to be capable of angular motion in another plane, with the plane in which the second element moves being substantially orthogonal to the plane in which the first element moves, and the first and second movable elements are coupled together in such a way as to allow simultaneous angular movement of the external fixator in the two substantially orthogonal planes. There is also described a bone fixation system for use in the treatment of a fractured bone, which fixation system is provided with a data logging device which is capable of sensing and storing data relating to the frequency of occurrence of an event associated with at least one physical characteristic of the fixation system. There is also described a method of monitoring the use in the treatment of a fractured bone of a bone fixation system, which method comprises sensing and storing data relating to the frequency of occurrence of an event associated with at least one physical characteristic of the fixation system using a data logging device with which the fixation system is provided. The data logger can be used to continuously monitor, for example, the frequency with which a certain relative displacement in the fixator occurs, which can be directly related to relative movement of the bone fragments and thereby to healing callus formation.

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