S-100β and Antioxidant Capacity in Cerebrospinal Fluid during and after Thoracic Endovascular Aortic Repair

Background Thoracic Endovascular Aortic Repair (TEVAR) has substantially decreased the mortality and major complications from aortic surgery. However, neurological complications such as spinal cord ischemia may still occur after TEVAR. S-100 β is a biomarker of central nervous system injury, and oxidant injury plays an important role in neurological injury. In this pilot study, we examined the trends of S-100 β and antioxidant capacity in the CSF during and after TEVAR.Methods We recruited 10 patients who underwent elective TEVAR. CSF samples were collected through a lumbar catheter at the following time points: before the start of surgery ( T 0) and immediately ( T 1) and 24 ( T 2) and 48 hours ( T 3) after the deployment of the aortic stent. S-100 β and CSF antioxidant capacity were analyzed with the use of commercially available kits.Results We observed that the level of S-100 β in all of the subjects at 24 hours after the deployment of the aortic stent ( T 2) increased. However, the levels of S-100 β at T 1 and T 3 were comparable to the baseline value. The antioxidant capacity remained unchanged. No patient had a clinical neurologic complication.Conclusions Our observations may indicate biochemical/subclinical central nervous system injury attributable to the deployment of the aortic stent.