Significant Correlation between Regional Tissue Oxygen Saturation and Vital Signs of Critically Ill Infants.

Background: Near-infrared spectroscopy (NIRS) has been used to non-invasively measure specific tissue oxygen saturation (StO) continuously. Cerebral autoregulation status can be derived from NIRS and arterial blood pressure. The relationship of both cerebral and somatic StO, fractional tissue oxygen extraction (FTOE), and cerebro-splanchnic oxygenation ratio (CSOR) with measured vital sign parameters for Neonatal Intensive Care Unit (NICU) patients has not been well studied.