Bone fracture fixation clamp

Patent metadata

Field	Value
Publication number	US-11950816-B2
Application number	US-202117456722-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Feb 28, 2020
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

A bone fixation clamp includes first and second clamp members, a stud, and a locking nut. The first member extends along a curve corresponding to an outer surface of a first portion of bone and includes an opening extending therethrough along an axis extending adjacent to the bone. The second member extends along a curve corresponding to an outer surface of a second portion of bone. The stud is receivable within the opening of the first member. The nut includes a threaded channel threadedly engaging a portion of the stud so that, when the first and second members are in the operative configuration, the nut is threadable over the stud to fix the first and second members over bone. The nut includes an anti-loosening feature which, when the nut is threaded over the stud, results in an interference with threading along the stud.

First claim

What is claimed is:

1. A bone fixation clamp, comprising:
a first clamp member extending from a first end to a second end along a curve corresponding in shape to an outer surface along a first target portion of a bone, the first end including a stud opening extending therethrough along an axis which, when the first clamp member is positioned along the first target portion in an operative configuration, extends adjacent to the bone, the first clamp member including, at the second end, at least one variable angle screw hole configured to receive therein a variable angle screw at a user-selected angle relative to an axis of the at least one variable angle screw hole within a first predetermined range of permitted angulations; and
a second clamp member extending from a first end to a second end along a curve corresponding in shape to an outer surface along a second target portion of the bone, the second clamp member including a stud extending longitudinally from the first end of the second clamp member to a stud free end oriented so that, when the second clamp member is positioned along the second target portion of the bone in the operative configuration, the stud may pass through the stud opening of the first clamp member along the axis of the stud opening as the first clamp member is moved toward the first target portion.

2. The bone fixation clamp of claim 1 , wherein the second clamp member further comprises a bending zone positioned between a portion of the second clamp member including the at least one variable angle screw hole and the first end of the second clamp member, the bending zone facilitating bending of the second clamp member to alter an orientation of the axis of the at least one variable angle screw hole relative to the first end of the second clamp member.

3. The bone fixation clamp of claim 1 , wherein the second clamp member further includes a clamp opening extending therethrough along at least a portion of a length thereof, the clamp opening reducing an area of the second target portion of bone covered by the second clamp member.

4. The bone fixation clamp of claim 1 , further comprising a locking nut including a threaded channel configured to threadedly engage a portion of the stud so that, when the first and second clamp members are in the operative configuration, the locking nut is threadable over the stud to fix the first and second clamp members over the bone, the locking nut including an anti-loosening feature which, when the locking nut is threaded over the stud, results in an interference with threading along the stud.

5. The bone fixation clamp of claim 4 , wherein the anti-loosening feature includes a deformable portion deforming to interfere with threading along the stud.

6. The bone fixation clamp of claim 5 , wherein the locking nut extends longitudinally from a first end to a second end and includes a pair of grooves extending into the first end, and wherein the deformable portion is defined via a first slit extending through a wall of the locking nut from a first one of the pair of grooves about a portion of a circumference of the locking nut and a second slit extending through the wall of the locking nut from an end of the first slit toward the first end of the locking nut.

7. The bone fixation clamp of claim 4 , wherein the locking nut extends longitudinally from a first end to a second end, the locking nut including a pair of grooves extending into the first end, through a wall of the locking nut so that the threaded channel is open to an exterior of the locking nut via the pair of grooves.

8. The bone fixation clamp of claim 1 , wherein the stud and the stud opening are correspondingly sized and shaped so that the stud is non-rotatably receivable within the stud opening to prevent rotation of the first and second clamp members relative to one another about the axis of the stud opening.

9. The bone fixation clamp of claim 8 , wherein the stud includes a flat along a length thereof and the opening of the first clamp member includes a corresponding flat surface therealong.

10. The bone fixation clamp of claim 4 , wherein a length of the stud is selected to correspond to a width of a bone being treated.

11. The bone fixation clamp of claim 4 , wherein the anti-loosening feature includes a reduced minor diameter along a first portion of the threaded channel relative to a minor diameter along a second portion of the threaded channel.

Assignees

• Depuy Synthes Products Inc

Inventors

• Koay Kenny
• Fatone Peter
• Reppert Timothy

Classifications

• A61B17/8061 Primary

  specially adapted for particular bones (A61B17/70 and A61B17/74 take precedence) · CPC title

• A61B17/8019

  where the means are a separate tool rather than being part of the plate · CPC title

• A61B17/809

  with bone-penetrating elements, e.g. blades or prongs (bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233) · CPC title

• A61B17/82 Primary

  for bone cerclage {(apparatus for manipulating wires or straps A61B17/8861; wires, bands or straps other than cerclage A61B17/842)} · CPC title

• A61B17/8665

  Nuts · CPC title