External bone/joint fixation device
View Patent ↗An external foot/ankle fixation device has a one-piece frame component and a positionable cross bar that allows the attachment of generally anterior/posterior directed fixation wires or rods emanating from the foot/ankle of a patient. The external fixation device provides a stable fixation platform both in-plane and out-of-plane of the object of fixation (e.g. foot or ankle). The fixation device through the cross bar also provides various degrees of angulation of anterior/posterior directed wires in two planes. Posterior angulation components may be provided to the posterior portion of the frame component that provide additional fixation wire/rod angulation variations. Compression rails may also be provided. An optional elevator component may be attached to the bottom of the frame component that does not obstruct access to the soft tissues on the bottom of the foot. The elevator component protects the bottom of the foot from contaminated surfaces.
1. An external bone/joint fixation device comprising:
a frame component having a posterior portion and an anterior portion disposed transverse to said posterior portion, said frame component including a plurality of first fixation bores defined in said posterior portion;
a cross bar assembly attachable to said anterior portion of said frame component, said cross bar assembly including a cross bar component fixable at any one of a plurality of positions in relation to said anterior portion, said cross bar component having a plurality of second fixation bores;
a posterior angulation assembly attachable to said posterior portion of said frame component at any one of a plurality of positions in relation to said posterior portion; and
a fixation wire extending from said posterior angulation assembly to said cross bar component,
wherein said posterior portion includes (i) a first side frame segment, (ii) a second side frame segment spaced apart from said first side frame segment to define a first gap therebetween, and (iii) a first connector portion extending from said first side frame segment to said second side frame segment,
wherein said anterior portion includes (i) a first leg, (ii) a second leg spaced apart from said first leg to define a second gap therebetween, and (iii) a second connector portion extending from said first leg to said second leg,
said first side frame segment of said posterior portion is connected to said first leg of said anterior portion,
said second side frame segment of said posterior portion is connected to said second leg of said anterior portion, and
said fixation wire extends (i) over said first gap, and (ii) through said second gap.
2. The external bone/joint fixation device of claim 1 , wherein said cross bar component is rotatable about a longitudinal axis of said cross bar component.
3. The external bone/joint fixation device of claim 1 , wherein said cross bar assembly further includes first and second cross bar holders each configured for attachment to said anterior portion of said frame component and for receipt of an end of said cross bar.
4. The external bone/joint fixation device of claim 3 , wherein each cross bar holder is configured to clamp against an end of the cross bar component when the cross bar holder is mounted to said anterior portion of said frame component.
5. The external bone/joint fixation device of claim 1 , wherein said anterior portion extends above a first plane defined by said posterior portion.
6. The external bone/joint fixation device of claim 1 , wherein said posterior angulation component defines a wire retention bore configured to receive a fixator for receipt of a portion of the fixation wire.
7. The external bone/joint fixation device of claim 6 , wherein said posterior angulation component further defines a fastener bore alignable with any one of said plurality of first fixation bores defined in said posterior portion of said frame component.
8. The external bone/joint fixation device of claim 7 , further comprising a fastener extending through said fastener bore and a first of said plurality of first fixation bores defined in said posterior portion of said frame component.
9. The external bone/joint fixation device of claim 1 , further comprising an elevator configured to extend about a bottom portion of said frame component and allowing access to a sole of the foot.
10. The external bone/joint fixation device of claim 9 , wherein said elevator is adapted to evenly distribute pressure applied thereto.
11. The external bone/joint fixation device of claim 9 , wherein said elevator is arcuate shaped.
12. The external bone/joint fixation device of claim 1 , wherein:
said frame component forms a continuous loop,
said posterior portion defines a first part of said continuous loop, and
said anterior portion defines a second part of said continuous loop.
13. The external bone/joint fixation device of claim 1 , further comprising calibration markings disposed on said posterior portion.
14. The external bone/joint fixation device of claim 1 , wherein said frame is fabricated from at least one of a composite material, a polymer, a metal alloy and a shape memory material.
15. The external bone/joint fixation device of claim 1 , wherein said frame is fabricated from a radiolucent material.
16. A fixation device, comprising:
a frame having (i) a posterior portion defining a first plane, and (ii) an anterior portion defining a second plane which is non-coplanar in relation to said first plane;
a cross bar assembly coupled to said anterior portion of said frame;
a posterior angulation assembly coupled to said posterior portion of said frame; and
a fixation wire extending from said posterior angulation assembly to said cross bar assembly,
wherein said posterior portion includes (i) a first side frame segment, (ii) a second side frame segment spaced apart from said first side frame segment to define a first gap therebetween, and (iii) a first connector portion extending from said first side frame segment to said second side frame segment,
wherein said anterior portion includes (i) a first leg, (ii) a second leg spaced apart from said first leg to define a second gap therebetween, and (iii) a second connector portion extending from said first leg to said second leg,
said first side frame segment of said posterior portion is connected to said first leg of said anterior portion,
said second side frame segment of said posterior portion is connected to said second leg of said anterior portion, and
said fixation wire extends (i) over said first gap, and (ii) through said second gap.
17. The fixation device of claim 16 , wherein:
said cross bar assembly includes a first end portion and a second end portion,
said first end portion is attached to said first leg of said anterior portion,
said second end portion is attached to said second leg of said anterior portion,
said cross bar assembly includes a cross bar component, and
said cross bar component is fixable to said anterior portion of said frame at any one of a plurality of positions.
18. The fixation device of claim 17 , wherein said cross bar component is rotatable between (i) a first position of said plurality of positions, and (ii) a second position of said plurality of positions.
19. The fixation device of claim 16 , wherein:
said cross bar assembly includes a cross bar component,
said cross bar assembly further includes a first holder and a second holder,
said first holder is securable to said first leg of said anterior portion of said frame,
said second holder is securable to said second leg of said anterior portion of said frame,
said first holder is configured to clamp a first end of said cross bar component, and
said second holder is configured to clamp a second end of said cross bar component.
20. The fixation device of claim 16 , wherein said posterior angulation component is configured to be coupled to said posterior portion of said frame at any one of a plurality of positions along said posterior portion.
21. The fixation device of claim 20 , wherein:
said posterior portion of said frame defines a plurality of first bores,
said posterior angulation component defines a fastener bore, and
said fastener bore is alignable with any one of said plurality of first bores.
22. The fixation device of claim 21 , further comprising a fastener extending through said fastener bore and a first of said plurality of first fixation bores defined in said posterior portion of said frame.
23. The fixation device of claim 21 , wherein:
said posterior angulation component further defines a wire retention bore, and
said wire retention bore is configured to receive a fixator component therein.
24. The fixation device of claim 16 , wherein:
said frame forms a continuous loop,
said posterior portion of said frame defines a first part of said continuous loop, and
said anterior portion of said frame defines a second part of said continuous loop.
25. The fixation device of claim 16 , wherein:
said first plane and said second plane define an angle Θ, and 70°≦Θ≦110°.
26. The fixation device of claim 16 , wherein:
said first plane and said second plane define an angle Θ, and Θ is approximately equal to 90°.
27. A fixation device, comprising:
a frame having (i) a posterior portion defining a first plane, and (ii) an anterior portion defining a second plane which is non-coplanar in relation to said first plane;
a cross bar assembly coupled to said anterior portion of said frame;
a posterior angulation assembly coupled to said posterior portion of said frame; and
a fixation wire extending from said posterior angulation assembly to said cross bar assembly,
wherein said posterior portion includes (i) a first side frame segment, (ii) a second side frame segment spaced apart from said first side frame segment to define a first gap therebetween, and (iii) a first connector portion extending from said first side frame segment to said second side frame segment,
wherein said anterior portion includes (i) a first leg, (ii) a second leg spaced apart from said first leg to define a second gap therebetween, and (iii) a second connector portion extending from said first leg to said second leg,
wherein said first side frame segment of said posterior portion is connected to said first leg of said anterior portion,
wherein said second side frame segment of said posterior portion is connected to said second leg of said anterior portion,
wherein said cross bar assembly includes (i) a cross bar component, (ii) a first holder configured to clamp a first part of said cross bar component, and (iii) a second holder configured to clamp a second part of said cross bar component,
wherein said first holder is secured to said first leg of said anterior portion of said frame, and
wherein said second holder is secured to said second leg of said anterior portion of said frame.
28. The fixation device of claim 27 , wherein said fixation wire extends (i) over said first gap, and (ii) through said second gap.
29. The fixation device of claim 28 , wherein said fixation wire further extends through said first gap.
30. The fixation device of claim 27 , wherein:
said cross bar component is configured to be fixed to said anterior portion of said frame at any one of a plurality of positions, and
said cross bar component is rotatable between (i) a first position of said plurality of positions, and (ii) a second position of said plurality of positions.
31. The fixation device of claim 27 , wherein said posterior angulation component is configured to be coupled to said posterior portion of said frame at any one of a plurality of positions along said posterior portion.
32. The fixation device of claim 31 , wherein:
said posterior portion of said frame defines a plurality of first bores,
said posterior angulation component defines a fastener bore, and
said fastener bore is alignable with any one of said plurality of first bores.
33. The fixation device of claim 32 , further comprising a fastener extending through said fastener bore and a first of said plurality of first fixation bores defined in said posterior portion of said frame.
34. The fixation device of claim 32 , wherein:
said posterior angulation component further defines a wire retention bore, and
said wire retention bore is configured to receive a fixator component therein.
35. The fixation device of claim 27 , wherein:
said frame forms a continuous loop,
said posterior portion of said frame defines a first part of said continuous loop, and
said anterior portion of said frame defines a second part of said continuous loop.
36. The fixation device of claim 27 , wherein:
said first plane and said second plane define an angle Θ, and 70°≦Θ≦110°.
37. The fixation device of claim 27 , wherein:
said first plane and said second plane define an angle Θ, and Θ is approximately equal to 90°.