Complication learning curve – Pedicle access trajectory malposition and adjustment due to EMG monitoring.
| First 50 April 2008 – Mar 2010 | Second 50 May 2010 – August 2011 | Third 50 Sept 2011 – October 2012 | Total | |
|---|---|---|---|---|
| Cases adjusted due to EMG | 8/50 cases = 16% | 6/50 cases = 12% | 3/50 cases = 6% | 17/150 cases = 11.3% |
| Pedicle access trajectories adjusted due to EMG | 9/216 screws = 4.2% | 7/209 screws = 3.3% | 3/202 screws = 1.5% | 19/627 screws = 3.0% |