INSTRUMENT KIT FOR PERFORMING SPINAL STABILIZATION

• US 20120031792A1
• Filed: 10/05/2011
• Published: 02/09/2012
• Est. Priority Date: 12/28/2009
• Status: Active Grant

• Current Assignee: Safe Orthopaedics
• Original Assignee: Safe Orthopaedics
• Inventors: Petit, Dominique
• Granted Patent: US 8,795,283 B2
• Time in Patent Office: Days
• US Class Current: 206/438
• CPC Class Codes: A61B 17/708 with tubular extensions coaxially mounted on the bone anchors
• CPC Class Codes: A61B 17/7082 for driving, i.e. rotating, screws or screw parts specially adapted for spinal fixation, e.g. for driving polyaxial or tulip-headed screws driving other bone screws A61B17/8875
• CPC Class Codes: A61B 2050/3008 having multiple compartments
• CPC Class Codes: A61B 50/30 Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments for wound clamps A61B17/10; for ligaturing clips A61B17/122; packages or dispensers for surgical gloves or finger-stalls A61B42/40
• CPC Class Codes: A61B 50/33 Trays

Abstract

A disposable surgical kit for fixing the vertebrae using a posterior or postero-lateral route has at least one pedicle screw or vertebral screw and an assembly tube cooperating with the screw. The assembly tube is composed of two independent rigid half-shells. Each of the half-shells has, on the inner face of its proximal end, a shoulder with a shape complementing a recess formed on each side of the screw head in order to permit the gripping or the release of the screw by spreading apart the distal ends of the half-shells The kit additionally has a retractable securing element for securing the half-shells. The retractable securing element has longitudinal fastening means designed as a dovetail for engaging with complementary slides formed in the rigid half-shells.

Claims

1. A disposable surgical kit for fixing vertebrae using a posterior or postero-lateral route, said surgical kit comprising:

at least one of a pedicle screw and a vertebral screw;

an assembly tube cooperating with said at least one screw;

said assembly tube being composed of two independent rigid half-shells;

each of the half-shells having, on an inner face of a proximal end, a shoulder with a shape which complements a recess formed on each side of a screw head, in order to permit gripping or release of said at least one screw by spreading apart distal ends of said half-shells;

a retractable securing element for securing said half-shells; and

said retractable securing element having longitudinal fastening means designed as a dovetail for engaging with complementary slides formed in said rigid half-shells.

2. A disposable surgical kit according to claim 1, wherein said assembly tube is pre-mounted securely on said at least one screw, the assembly tube being detachable from said at least one screw.

3. A disposable surgical kit according to claim 2, wherein said kit is supplied in a sealed package for sterile packaging containing said at least one scre which forms a bone-anchoring element and the pre-mounted assembly tube.

4. A disposable surgical kit according to claim 1, wherein the assembly tube has a longitudinal opening leading into a proximal part said at least one screw which forms a bone-anchoring element for passage of a connecting element.

5. A disposable surgical kit according to claim 1, wherein said retractable securing element additionally has a blocking element for blocking a rod with respect to the at least one screw, and an internal diameter of the assembly tube permitting passage of the blocking element for blocking the rod on the at least one screw forming a bone-anchoring element.

6. The disposable surgical kit according to claim 1, further comprising an ancillary passing through the assembly tube and having an end pre-mounted on the at least one screw for transmission of a screwing torque.

7. The disposable surgical kit according to claim 1, wherein each of the half-shells has, at a distal end remote from the at least one screw, at least one threaded zone for joining the half-shells parallel to each other by way of a ring.

8. The disposable surgical kit according to claim 1, wherein the two half-shells have, in their joined parts, tenon-and-mortise positioning means.

9. The disposable surgical kit according to claim 1, further comprising a ring provided with a bayonet-type formation for engaging stubs formed on the two half-shells.

10. The disposable surgical kit according to claim 9, wherein the securing element has an internal shape permitting passage of a screwdriver.

11. The disposable surgical kit according to claim 1, wherein all the components of the surgical kit are disposable.