Clinical application of posterior paraspinal approach in removing of pedical screw fixation

English Keywords:Paraspinal muscle approach  Pedicle screw  Removing

English Abstract:

  【Abstract】 Objectives： To evaluate the clinical efficacy and significance of paraspinal muscle approach in removing pedicle screw fixation. Methods： Clinical materials of 65 patients who had pedicle screw removing, were collected between January 2003 and May 2011. Study group included 35 patients who received operations with paraspinal muscles approach. Control group included 30 patients who received operations with conventional posterior midline approach. Mean-operative time, mean-blood loss, postoperative complication rate were compared between study group and control group. Statistical analysis was used. Results： In study group receiving operations with paraspinal muscle approach, mean operative time was 45±10min; mean blood loss was 64±25ml; incision hematoma was found in 3 patients; there was no case with cerebrospinal fluid leakage, cauda and dural injury; postoperative complication rate was 11.4%. In control group receiving operations with conventional approach, mean operative time was 73±25min; mean blood loss was 220±100ml; incision hematoma was found in 1 case; incision poor healing was found in 2 cases; postoperative complication rate was 13.3%. There were significant differences in mean operation time and mean blood loss between two groups(P<0．05). In complication rate there was no significant difference(P＞0.05). Conclusions： Paraspinal muscle approach for removing pedical screw fixation shows less mean operation time, less bleeding. It provides a safe, effective, minimally invasive surgical option.