Minimally Invasive Implant and Crimping System

• US 20110112538A1
• Filed: 07/22/2009
• Published: 05/12/2011
• Est. Priority Date: 07/25/2008
• Status: Active Grant

• Current Assignee: DePuy Synthes Products LLC (Johnson & Johnson)
• Original Assignee: Synthes USA LLC (Johnson & Johnson)
• Inventors: Dell'Oca, Alberto A. Fernandez
• Granted Patent: US 8,496,659 B2
• Time in Patent Office: Days
• US Class Current: 606/74
• CPC Class Codes: A61B 17/82 for bone cerclage apparatus for manipulating wires or straps A61B17/8861; wires, bands or straps other than cerclage A61B17/842
• CPC Class Codes: A61B 17/842 Flexible wires, bands or straps A61B17/72, A61B17/82, A61B17/86 take precedence
• CPC Class Codes: A61B 17/8863 Apparatus for shaping or cutting osteosynthesis equipment by medical personnel
• CPC Class Codes: A61B 17/8869 Tensioning devices

Abstract

A device for treating a bone comprises a cable block including a first lumen extending from a first proximal opening in a proximal face of the cable block to a first distal opening in a distal face thereof, the first lumen being configured to receive a cerclage cable including an enlarged end. The cable block further includes a second lumen extending from a second proximal opening in the proximal face to a second distal opening in the distal face and being configured to receive a portion of the cable extending from the enlarged end while preventing the enlarged end from passing therethrough. The cable block includes a slot connecting distal portions of the first and second lumens and being at least as large as the second lumen in combination with a crimpable locking member including a channel configured to receive the portion of the cable extending from the enlarged end.

Claims

1. A device for treating a bone, comprising:

a cable block including a first lumen extending from a first lumen proximal opening in a proximal face of the cable block to a first lumen distal opening in a distal face of the cable block, the first lumen being sized and shaped to slidably receive therethrough a cerclage cable including an enlarged end, the cable block further including a second lumen extending from a second lumen proximal opening in the proximal face of the cable block to a second lumen distal opening in the distal face of the cable block, the second lumen being sized and shaped to receive therethrough a portion of the cable extending from the enlarged end while preventing the enlarged end from passing therethrough, the cable block including a slot connecting distal portions of the first and second lumens, the slot being at least as large in diameter as the second lumen; and

a locking member including a channel sized to slidably receive the portion of the cable extending from the enlarged end and a proximal abutting surface configured to abut a portion of a proximal face of the cable block surrounding the second lumen proximal opening, the locking member being formed of a material crimpable over the cable to fix the locking member at a desired position on the cable.

2. The device of claim 1, wherein the second lumen intersects with the first lumen within the cable block at an intersection point no further distally than a proximal end of the slot.

3. The device of claim 1, wherein the slot is substantially equal in diameter to the second lumen.

4. A system for treating a bone comprising:

a cable block including a first lumen extending from a first lumen proximal opening in a proximal face of the cable block to a first lumen distal opening in a distal face of the cable block, the first lumen being sized and shaped to slidably receive therethrough a cerclage cable including an enlarged end, the cable block further including a second lumen extending from a second lumen proximal opening in the proximal face of the cable block to a second lumen distal opening in the distal face of the cable block, the second lumen being sized and shaped to receive therethrough a portion of the cable extending from the enlarged end while preventing the enlarged end from passing therethrough, the second lumen intersecting with the first lumen within the cable block, the cable block including a slot connecting portions of the first and second lumens from the distal face of the cable block to a slot end point no further proximally than a point at which the first and second lumens intersect;

a locking member including a channel sized to slidably receive the portion of the cable extending from the enlarged end and a proximal abutting surface configured to abut a portion of a proximal face of the cable block surrounding the second lumen proximal opening, the locking member being formed of a material crimpable over the cable to fix the locking member at a desired position on the cable; and

a crimping device including a first sleeve and a second sleeve, the first sleeve including a first longitudinal body having a third lumen extending longitudinally therethrough, the second sleeve including a second longitudinal body sized to be housed substantially within the first lumen, the second longitudinal body defining a fourth lumen extending therethrough, the crimping device being movable between an open configuration in which the deformable member and the cable may be slidably received therein and a crimping configuration in which the first and second longitudinal bodies are rotated relative to one another about a longitudinal axis of the crimping device to crimp the deformable member over the cable.

5. The system of claim 4, further comprising a bone plate to be held in a desired position against the bone, the plate including a plurality of grooves along an edge of proximal surface thereof, each of the grooves being sized and shaped to receive therein a width of a cerclage cable such that the cable is prevented from sliding longitudinally along the plate.

6. The system of claim 4, wherein a diameter of a distal opening of the fourth lumen is smaller than a diameter of a portion the fourth lumen extending proximally therefrom and is off-center relative to the longitudinal axis, a diameter of a distal opening of the third lumen being smaller than a diameter of a portion of the third lumen extending proximally therefrom and is off-center relative to the longitudinal axis, the distal openings of the third and fourth lumens being aligned in the open configuration to receive the deformable member therethrough and misaligned in the crimping configuration to crimp the deformable member over the cable.

7. The system of claim 6, the crimping device further including a third sleeve including a third longitudinal body housed substantially within the second lumen and rotatable relative to thereto into a cutting configuration, the third longitudinal body including a fifth lumen extending therethrough, the fifth lumen being substantially aligned with the distal openings of the third and fourth lumens when in the open configuration and being movable to a cutting configuration in which the fifth lumen is moved out of alignment with the distal openings of the third and fourth lumens to cut a portion of the cable extending proximally of the deformable member.

8. The system of claim 6, wherein the first sleeve includes a quadrant wheel extending laterally of the proximal end of the first longitudinal body and wherein the second sleeve includes a ratchet pawl engaging teeth of the quadrant wheel such that the first and second sleeves are selectively rotatably locked with respect to one another.

9. The system of claim 4, wherein the second longitudinal body includes a protrusion extending distally from a distal end thereof, an edge of the protrusion being adjacent to a distal opening of the fourth lumen, a distal opening of the third lumen being sized and shaped to receive the protrusion and expose the fourth lumen in the open configuration, the deformable member being crimped between an edge of the distal opening and the edge of the protrusion as the first and second longitudinal members are moved to the crimping configuration.

10. The system of claim 4, the first longitudinal body including a sixth lumen and a recess at a distal end thereof extending radially about a portion of the third lumen, the sixth lumen extending parallel to the third lumen such that the sixth lumen extends through the recess adjacent to a lateral surface thereof, the sixth lumen being sized and shaped to receive the deformable member and the cable therein, the second longitudinal body including a protrusion extending radially outward from a distal end thereof positioned so that the protrusion is received within the recess exposing the sixth lumen when in the open configuration, movement of the first and second longitudinal members to the crimping position crimping the deformable member between a lateral surface of the protrusion and the lateral surface of the recess.

11. The system of claim 4, the first sleeve including a first handle extending laterally from a proximal end of the first longitudinal body and the second sleeve including a second handle extending laterally from a proximal end of the second longitudinal body, the first and second handles being arranged such that drawing the first and second handles toward and away from one another rotates the first and second sleeves between the open and crimping configurations.

12. A method for treating a bone, comprising:

circling a cable around a target bone to be treated, the cable extending from an enlarged first end to a distal end;

inserting the enlarged first end of the cable through a first lumen of a cable block and passing the second end through a second lumen of the cable block, the first lumen extending from a first lumen proximal opening in a proximal face of the cable block to a first lumen distal opening in a distal face of the cable block, the second lumen extending from a second lumen proximal opening in the proximal face of the cable block to a second lumen distal opening in the distal face of the cable block, the cable block further including a slot connecting distal portions of the first and second lumens, the slot having a width sized to slidably receive the cable therethrough;

displacing the enlarged end of the cable laterally through the slot so that the enlarged end of the cable abuts a portion of the slot through which it cannot pass;

passing the second end of the cable through a lumen of a locking member and sliding the locking member over the cable until an end of the locking member abuts the cable block;

applying a desired tension to the cable; and

crimping the deformable member over the cable to fix the cable around the target bone at the desired tension.

13. The method of claim 12, further comprising positioning a plate along a target portion of the target bone with the cable circled about both the bone and the plate to hold the plate against the target portion of the target bone.

14. The method of claim 13, wherein the plate includes a plurality of grooves along an edge of a surface thereof which faces away from the target bone, each of the grooves being sized and shaped to receive a width of the cable therein to prevent the cable from sliding longitudinally along the plate.