PEDICLE SCREW EXTENSION SYSTEM

摘要

The pedicle screw extension system may include a removable cannulated extension provided to a pedicle screw tulip head. The cannulated extension may permit percutaneous implantation of pedicle screws followed by rod placement that may be guided by slots running along the length of the extension. The cannulation may allow for passage and attachment of secondary instruments, such as for example: a screw driving device, a rod measuring device, and a set screw driving device. The screw extension may also include secondary device attachment features allowing the rod to be pushed down in a screw tulip head and for extension removal as needed.

主权项

1. A pedicle screw extension system configured for percutaneous placement of a screw in a mammal, comprising:
a locking bar; and an extension body including an actuator at its proximal end, the actuator configured to drive the locking bar linearly along a longitudinal axis of the extension body into a locking mechanism to engage the screw, wherein the locking mechanism comprises a locking door pivotally attached to the extension, and wherein the actuator is configured to drive the locking bar into a channel of a respective locking door to secure the doors closed around a head of the screw.