Surgical device for spinal fixation

Patent metadata

Field	Value
Publication number	US-10869696-B2
Application number	US-201916262549-A
Country	US
Kind code	B2
Filing date	Jan 30, 2019
Priority date	Jan 30, 2019
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

Surgical instruments, methods, and systems are provided for securing spinal fixation elements to bone. For example, a spinal fixation system is provided that has a receiver with proximal and distal ends. The proximal end of the receiver is configured to receive various fixation members, such as spinal rods and set screws, therein. The distal end of the receiver has a hook member that is operably coupled thereto and has an opening that is configured to receive bone therein. The hook member is configured to be secured to bone without penetrating the bone.

First claim

What is claimed is:

1. A spinal fixation system, comprising:
a receiver configured to receive at least one fixation member, the receiver having a first end defined by opposed arms with a channel therebetween that is configured to receive the at least one fixation member and a second end, the second end being operably coupled to a hook member having an open portion that is configured to engage a portion of bone, the hook member having a distal-most blade portion that forms an edge of the open portion;
a cable attachable to the receiver and to the blade portion of the hook member, the cable being configured to encircle the bone to extend across the open portion to secure the receiver to the bone without penetrating the bone; and
a closure member insertable between the opposed arms of the receiver and configured to compress the fixation member into the receiver.

2. The spinal fixation system of claim 1 , wherein the blade portion having a channel therethrough to receive a first end of the cable.

3. The spinal fixation system of claim 1 , wherein the cable is pre-curved such that the cable is configured to be passed around lamina.

4. The spinal fixation system of claim 1 , wherein the receiver has at least first and second receiving members thereon configured to receive corresponding first and second ends of the cable, one of the at least first and second receiving members being on the blade portion, and the first and second ends of the cable are configured to be crimped to secure them in the first and second receiving members.

5. The spinal fixation system of claim 1 , wherein each of the opposed arms has a loop thereon configured to receive an end of the cable therethrough.

6. The spinal fixation system of claim 1 , wherein the at least one fixation member comprises a spinal rod, and the closure member comprises a set screw.

7. A spinal fixation system, comprising:
a receiver configured to receive at least one fixation member, the receiver having a first end defined by opposed arms with a channel therebetween that is configured to receive the at least one fixation member and a second end,
a hook member operably coupled to the second end of the receiver, the hook member having an open portion that is configured to engage a portion of bone to secure the receiver to the bone without penetrating the bone, the hook member being configured to move relative to the receiver from an open position allowing release of the bone to a closed position securely gripping the bone when the bone is received in the open portion;
a cam mechanism configured to move the hook member relative to the receiver from the open position to the closed position, the cam mechanism having an arm extending between first and second cam wings, the arm being configured to cause actuation of the cam mechanism when the arm is pivoted from a proximal position to a distal position; and
a closure member insertable between the opposed arms of the receiver and configured to compress the fixation member into the receiver.

8. The spinal fixation system of claim 7 , further comprising a cam lock configured to prevent release of the cam mechanism after the cam mechanism has moved the hook member to the closed position.

9. The spinal fixation system of claim 8 , wherein the cam lock is configured to prevent release of the cam mechanism when the cam lock contacts the fixation member received in the receiver.

10. The spinal fixation system of claim 7 , wherein the hook member has a bone-engaging surface facing the open position of the hook member that is rougher than a non-bone engaging surface thereof, the bone-engaging surface being configured to grip the bone received thereagainst.

11. The spinal fixation system of claim 8 , wherein the cam lock is positioned at least partially within the receiver.

12. The spinal fixation system of claim 7 , wherein the first and second cam wings are positioned on opposite sides of the receiver and the hook member from each other.

13. The spinal fixation system of claim 7 , wherein the first cam wing is configured to pivot about a first pivot point, the second cam wing is configured to pivot about a second pivot point, and the arm is configured to pivot about the first and second pivot points.

14. A spinal fixation method, comprising:
inserting a bone into an open portion of a hook member on a distal end of a receiver;
encircling the bone with a cable attached to the receiver and a distal-most blade portion of the hook member to secure the hook member to the bone without penetrating the bone, the cable extending across the open portion;
inserting a spinal rod into a channel defined by opposed arms on a proximal end of the receiver of the surgical device; and
rotating a set screw between the opposed arms to secure the spinal rod into the channel.

15. The spinal fixation method of claim 14 , further comprising passing a first end of the cable through a first receiving member on the blade portion of the hook member and a second end of the cable through a second receiving member on the receiver.

16. The spinal fixation method of claim 15 , further comprising, after passing the first and second ends through the first and second receiving members, crimping each of the first and second ends to secure the cable to the receiver and the receiver to the bone.

17. The spinal fixation method of claim 15 , further comprising passing the first end of the cable through a channel formed in the blade portion of the hook member, the channel being the first receiving member.

18. The spinal fixation method of claim 14 , wherein the cable is a pre-curved cable, and encircling the bone with the cable includes passing the cable through a first secure engagement on the blade portion of the hook member, beneath and around the bone, along a posterior of a spine of a patient, and through a second secure engagement on the receiver.

Assignees

• Medos Int Sarl

Inventors

• Jacobs Samuel
• Hall Mark

Classifications

• A61B17/7047 Primary

  Clamps comprising opposed elements which grasp one vertebra between them · CPC title

• A61B17/7032

  Screws or hooks with U-shaped head or back through which longitudinal rods pass · CPC title

• A61B17/7053 Primary

  with parts attached to bones or to each other by flexible wires, straps, sutures or cables · CPC title

• A61B17/7001

  Screws or hooks combined with longitudinal elements which do not contact vertebrae (A61B17/7058 takes precedence) · CPC title

• A61B17/7056

  Hooks with specially-designed bone-contacting part · CPC title