Abstract
Feasibility of cerebral tissue oxygenation measurements immediately after birth has been published starting with first values 2 min after birth. Aim of this study was to evaluate, the time periods from birth and from arrival at the resuscitation table to obtain the first cerebral tissue oxygenation values with two different near infrared spectroscopy (NIRS) devices. The present study is an analysis of exploratory parameters of two prospective observational studies. Cerebral tissue oxygen saturation was measured by the NIRO 200NX measuring “cerebral-tissue-oxygenation-index” (cTOI) or the INVOS5100C measuring “cerebral-regional-oxygen-saturation” (crSO2). Four time periods (T) were defined: T1 birth to arrival at resuscitation table, T2 arrival to application of NIRS sensor, T3 application to first displayed cTOI or crSO2 value, and T4 from arrival at resuscitation table to first displayed values. Additionally, we compared first displayed values of cTOI and crSO2. Thirty neonates were included. Twenty-four were term and six late-preterm neonates. Fifteen neonates measured with NIRO were compared to 15 measured with INVOS. T1 was 49 (6–163) s with NIRO versus 59 (15–87) s with INVOS, T2 14 (4–20) s versus 12 (15–18) s, T3 33 (13–138) s versus 17 (6–290) s and T4 46 (20–153) s and 34 (14–300) s. The first displayed value tended to be higher for cTOI [54% (18–80)] compared to crSO2 [35% (15–87)]. There were no significant differences between devices in time periods and first values displayed. Cerebral tissue oxygenation can be measured within 1 min after arriving at the resuscitation table in term and preterm neonates after birth without difference between devices.
Highlights
During immediate transition after birth beside the clinical assessment of newly born infants, routine monitoring with pulse oximetry/ECG is recommended
Cerebral tissue oxygenation can be measured within 1 min after arriving at the resuscitation table in term and preterm neonates after birth without difference between devices
Out of the 150 neonates with near-infrared spectroscopy (NIRS) measurements during the first 15 min after birth, 15 neonates measured with INVOS 5100C were included, in whom time of arrival and application of the sensors were clearly visible
Summary
During immediate transition after birth beside the clinical assessment of newly born infants, routine monitoring with pulse oximetry/ECG is recommended These two noninvasive continuous monitoring methods enable measurement of the arterial oxygen saturation (SpO2) and heart rate. There are different NIRS devices available, but two most widely used devices in neonates are the NIRO 200 NX (Hamamatsu Photonics, Japan) providing “tissue oxygenation index” (TOI) and the INVOS 5100C (Covidien, USA) providing “regional tissue oxygen saturation” (rSO2). With both NIRS devices centiles of cerebral tissue oxygenation immediately after birth starting with first values 2 min after birth have been already published [4, 5]. Several studies already reported on time periods to obtain first SpO2 values with pulse oximetry immediately after
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