Objective: Serum C-reactive protein(CRP) concentrations and white blood cell(WBC) count are commonly used to identify postoperative wound infections. We investigated whether changes in serum CRP levels and WBC counts actually differed between patients undergoing revision spinal fusion surgery and those undergoing a primary fusion. Methods: Patients who underwent posterolateral fusion(PLF) surgery at Pusan National University Yangsan Hospital between October 2013 and April 2015 were considered for this study. Sixty-seven patients with primary lumbar PLF(pPLF) and 21 with revision PLF(rPLF) were enrolled. A retrospective assessment of preoperative and postoperative CRP levels and WBC count was undertaken. Also, we gathered peak CRP day, and CRP normalization days. Comorbidity data were also obtained to evaluate any effects on the course of CRP and WBC count postoperatively. Results: CRP levels peaked at 3 days after surgery. The maximum CRP values recorded for each group: 4.17(standard deviation[SD], 4.18)mg/dL and 4.88(SD, 3.03)mg/dL for pPLF and rPLF. This difference was not statistically significant(p=0.24). A rapid fall in CRP within 5-9 days was observed for both groups. Conclusion: Out of our expectation, changes in CRP levels after spinal fusion surgery follow the same course regardless of whether it is a revision operation or not. Because of this result, both the primary PLF surgery and revision PLF surgery should be monitored using CRP in the similar way and the antibiotic administration should be determined.
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