Alina Vilkė, Milda Juškė, Diana Bilskienė, Andrius Macas
Abstract
Cerebral blood flow quickly adapts to the ever changing hemodynamics, but the disruption of brain imbalance between oxygen supply and demand may result in varying degrees of damage: cognitive dysfunction, organ damage, and worse patients’ outcomes. Therefore, in this case, it is important to examine changes in oxygen delivery and identify the first signal of threatening organ dysfunction. Measurement with cerebral oximetry is based on the ability of light (near-infrared) to penetrate the skull and determine regional hemoglobin oxygen saturation (rSO2). Cerebral oximetry using near-infrared spectroscopy (NIRS) is noninvasive technique used to estimate rSO2 value at the real time. This value should be determined prior to any intervention, the normal range in healthy volunteers – 60-80%. Significant desaturation episodes, the rSO2 value is below 50% or 20% decline from baseline saturation. The rSO2 value should be interpreted with other clinical patient information, because many factors influence and change the measurement data. In the near future NIRS can be used routine method of monitoring in anaesthesia.
Article in Lithuanin
Keyword(s): oxygenation; cerebral blood flow; regional oxygen saturation values
DOI: 10.5200/sm-hs.2013.135
Full Text: PDF