External fixator for distal radius fractures

• US 6,491,694 B1
• Filed: 07/05/2000
• Issued: 12/10/2002
• Est. Priority Date: 12/05/1994
• Status: Expired due to Fees

• Current Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Original Assignee: Smith & Nephew Incorporated (Smith & Nephew PLC)
• Inventors: Orsak, James E.
• Primary Examiner(s): Robert, Eduardo C.
• Application Number:
  US09/530,760
• Time in Patent Office: 888 Days
• Field of Search: 606/53, 606/54, 606/55, 606/59, 606/57, 606/105
• US Class Current: 606/57
• CPC Class Codes: A61B 17/6425 specially adapted to be fitted across a bone joint
• CPC Class Codes: A61B 17/6466 with pin-clamps movable along a solid connecting rod
• CPC Class Codes: A61B 17/66 Alignment, compression or distraction mechanisms

Abstract

An external fixator for fixating fractures provides an elongated support rod that includes proximal and distal rod sections. Fixation pins are provided for engaging the patient'"'"'s bone tissue on opposite sides of a fracture. Clamps are rotatably supported upon the proximal rod section and distal rod section, each of the pins being movable in rotational fashion both with respect to the rod and with respect to the pins. At least one of the clamps has articulating portions that rotate and angulate relative to one another so that total adjustment is provided between the rod and the pins. The articulating portion can be rigidified using one set fitting or set screw.

Claims

1. An external fixator apparatus for fixating bone parts at a fracture site, comprising:

(a) a unitary one-piece elongated support rod that includes proximal and distal rod sections, the proximal and distal rod sections being offset but generally parallel;

(b) fixation pins for engaging the patient'"'"'s bone parts on opposing sides of the fracture site;

(c) a pair of support clamps rotatably supported upon the support rod for externally supporting the bone pins and the patient'"'"'s bone parts, said clamps including at least one clamp that has two articulating parts that enable the pins to both angulate and rotate relative to the rod; and

(d) a set screw that rigidities both articulating parts simultaneously to rigidify each bone pin relative to the rod.

2. The fixator apparatus of claim 1 wherein the proximal and distal rod sections are joined by a transverse rod section that offsets the proximal and distal rod sections.

3. The fixator apparatus of claim 1 wherein the pair of clamps includes clamping portions for clamping the proximal and distal rod sections respectively at recesses on the clamps.

4. The fixator apparatus of claim 1 wherein one of the clamps includes a pin block for holding multiple pins.

5. The fixator apparatus of claim 4 wherein the pin block with one of the clamps has a clamp body that attaches to the rod and a projecting portion that rests in a concavity of a clamp body.

6. The apparatus of claim 4 wherein the pin block and a clamp body can rotate relative to one another when the set screw is loosened.

7. The apparatus of claim 6 wherein the pin block and clamp body can angulate relative to one another when the set screw is loosened.

8. The apparatus of claim 4 wherein the clamp body and pin block can simultaneously rotate to one another and angulate relative to one another when the set screw is loosened.

9. The apparatus of claim 1 wherein the rod has a central linear longitudinal axis.

10. The apparatus of claim 1 wherein the clamps are slidable upon the rod during use.

11. An external fixator apparatus for fixation of a bone fracture, comprising:

(a) a unitary one-piece elongated support rod that includes proximal and distal rod sections, the proximal and distal rod sections being offset but generally parallel;

(b) fixation pins for engaging and supporting the patient'"'"'s bone tissue at selected positions on opposite sides of the fracture;

(c) a first clamp that is movably supported upon the proximal rod section for externally supporting the patient'"'"'s bone tissue on a first side of the fracture, said clamp including means for holding the fixation pins, said first clamp being configured to allow rotation of the pins relative to the rod, angulation of the pins relative to the rod, and a sliding movement of the clamp along the rod; and

(d) a second clamp movably upon the distal rod section for externally supporting the patient'"'"'s bone tissue, said second clamp including means for holding the fixation pins, said second clamp allowing rotation relative to the rod and relative to the fixation pin.

12. The external fixator of claim 11 wherein the first clamp has a rod opening sized and shaped to conform to the rod.

13. The external fixator of claim 11 wherein one of the clamps has first and second sections that articulate with respect to each other.

14. The external fixator of claim 13 wherein one of the sections holds bone joints.