The change in regional cerebral oxygen saturation after stellate ganglion block

Abstract

[한글]

[영문]Background: Stellate ganglion block (SGB) is known to increase blood flow to the innervations area of the stellate ganglion. Near infrared spectroscopy reflects an increased blood volume and allows continuous, non-invasive, and bedside monitoring of regional cerebral oxygen saturation (rSO2). The influence of SGB on bilateral cerebral oxygen saturation was investigated using a near infrared spectroscopy.Methods: SGB was performed on 30 patients with 1% lidocaine 10 ml using a paratracheal technique at the C6 level and confirmed by the presence of Horner's syndrome. The blood pressure (BP), heart rate (HR) and rSO2 were measured before, 5, 10, 15 and 20 minutes after SGB. Tympanic temperature of each ear was measured prior to SGB and 20 minutes after SGB.Results: The increments of the rSO2 on the block side from the baseline were statistically significant at 5, 10, 15 and 20 minutes. The rSO2 on the non-block side compared with the baseline, however, decreased at 15 and 20 minutes. The difference between the block and the non-block sides was significant at 15 and 20 minutes. The BP at 10, 15 and 20 minutes increased and the HR increased at 10 and 15 minutes. There were no significant changes in tympanic temperatures on both block and non-block side.Conclusions: The rSO2 increased on the block side from the baseline but decreased on the non-block side.