• Adv Exp Med Biol · Jan 2005

    Validation of the CAS neonatal NIRS system by monitoring vv-ECMO patients: preliminary results.

    • Paul B Benni, Bo Chen, Francine D Dykes, Scott F Wagoner, Micheal Heard, April J Tanner, Teresa L Young, Khodayar Rais-Bahrami, Oswaldo Rivera, and Billie L Short.
    • Adv Exp Med Biol. 2005 Jan 1;566:195-201.

    AbstractThe CAS neonatal NIRS system determines absolute regional brain tissue oxygen saturation (SnO2) and brain true venous oxygen saturation (SnvO2) non-invasively. Since NIRS-interrogated tissue contains both arterial and venous blood from arterioles, venules, and capillaries, SnO2 is a mixed oxygen saturation parameter, having values between arterial oxygen saturation (SaO2) and cerebral venous oxygen saturation (SvO2). To determine a reference for SnO2, the relative contribution of SvO2 to SaO2 drawn from a brain venous site vs. systemic SaO2 is approximately 70:30 (SvO2:SaO2). If the relationship of the relative average contribution of SvO2 and SaO2 is known and does not change to a large degree, then NIRS true venous oxygen saturation, SnvO2, can be determined non-invasively using SnO2 along with SaO2 from a pulse oximeter.

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