Methods and techniques for spinal surgery
Method for performing spinal correction surgery. The method includes creating at least one access opening in a patient, and implanting a plurality of anchor devices through the at least one access opening onto a plurality of corresponding vertebral bodies. Each anchor device has a channel defined therein. The method further includes disposing a tether into the channel of each of the plurality of anchor devices. A first end portion of the tether is secured to a first of the plurality of anchor devices. Additionally, the method includes translating the vertebral body corresponding to the selected anchor device using a pusher tool. Furthermore, the method includes applying a tension to the tether using a tensioner.
1. A method for performing spinal correction surgery, comprising: creating at least one access opening in a patient;
implanting, through the at least one access opening, a plurality of anchor devices onto a plurality of corresponding vertebral bodies, with each anchor device anterior of a respective vertebral body rib head, each anchor device having a channel defined therein;
disposing a tether in the channel of each of the plurality of anchor devices;
securing a first end portion of the tether to a first of the plurality of anchor devices;
engaging a selected anchor device with a pusher tool through the at least one access opening;
translating the vertebral body corresponding to the selected anchor device using the pusher tool;
applying a tension to the tether using a tensioner; and
cutting the tether with an excess length of tether greater than a distance between two adjacent anchor devices extending beyond an inferior most anchor device.
2. The method of claim 1 , wherein the at least one access opening comprises a portal.
3. The method of claim 2 , wherein the portal is a thoracoscopy portal.
4. The method of claim 2 , wherein the at least one access opening comprises a plurality of portals.
5. The method of claim 1 , wherein the plurality of anchor devices comprise a plurality of spine screws.
6. The method of claim 5 , wherein each spine screw includes a threaded shank portion and a head portion, the channel of each spine screw is disposed proximate the head portion.
7. The method of claim 5 , wherein each spine screw includes a fastener to secure the tether in the channel thereof.
8. The method of claim 1 , wherein the tether is made of polyethylene-terephthalate (PET).
9. The method of claim 1 , wherein securing the tether to the first anchor device comprises fastening the tether within the channel of the first anchor device.
10. The method of claim 1 , wherein applying the tension to the tether is performed at a second portion of the tether.
11. The method of claim 1 , wherein translating the corresponding vertebral body and applying the tension to the tether are performed simultaneously to produce a corrective force.
12. The method of claim 1 , wherein the pusher is a thoracoscopic vertebral body pusher.
13. The method of claim 1 , further comprising: applying a compressive force to a vertebral body adjacent the selected vertebral body to adjust the relative position therebetween.
14. The method of claim 1 , further comprising: applying a distractive force to a vertebral body adjacent the selected vertebral body to adjust the relative position therebetween.
15. The method of claim 1 , further comprising: securing the tether to the selected anchor device after the corresponding vertebral body has been translated to a desired position.
16. The method of claim 15 , further comprising: engaging a second selected anchor device with a pusher tool through the at least one access opening;
translating the vertebral body corresponding to the second selected anchor device using the pusher tool.
17. The method of claim 16 , wherein engaging the selected second anchor device and translating the vertebral body corresponding to the selected second anchor device are performed after securing the tether to the first selected anchor device.
18. The method of claim 1 , further comprising securing a second end portion of the tether to a last of the plurality of anchor devices.
19. The method of claim 1 , further wherein slack is maintained in the tether between at least two anchor devices.