Traitement en cours

Veuillez attendre...

Paramétrages

Paramétrages

Aller à Demande

1. WO2020157679 - DISPOSITIF CHIRURGICAL POUR FIXATION VERTÉBRALE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

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;

a cable attachable to the receiver and 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 hook member has a distal-most blade portion that forms an edge of the open portion, 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, 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; 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, wherein the hook member operably couples to the receiver through a threaded shaft, and the hook member is configured to move relative to the receiver from the open position to the closed position through rotation of the threaded shaft.

9. The spinal fixation system of claim 7, further comprising a cam mechanism configured to move the hook member relative to the receiver from the open position to the closed position.

10. The spinal fixation system of claim 9, wherein the cam mechanism has an arm configured to cause actuation of the cam mechanism when the arm is pivoted from a proximal position to a distal position.

11. The spinal fixation system of claim 9, 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.

12. The spinal fixation system of claim 11, 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.

13. The spinal fixation system of claim 7, further comprising a ratchet mechanism configured to move the hook member relative to the receiver from the open position to the closed position.

14. The spinal fixation system of claim 13, wherein the ratchet mechanism includes an arm and a spring, the arm being configured to pivot from a disengaged position in which the hook member is in the open position to an engaged position in which the hook is in the closed position, the spring being configured to resist movement of the arm.

15. 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.

16. 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 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.

17. The spinal fixation method of claim 16, further comprising passing first and second ends of the cable through receiving members on the receiver.

18. The spinal fixation method of claim 17, further comprising, after passing the first and second ends through the receiving members, crimping each of the first and second ends to secure the cable to the receiver and the receiver to the bone.

19. The spinal fixation method of claim 17, further comprising passing the first end of the cable through a channel formed in a distal-most blade portion of the hook member, the channel being one of the receiving members.

20. The spinal fixation method of claim 17, 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 a distal end 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.