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  • Title: Role of intraoperative regional oxygen saturation using near infrared spectroscopy in the prediction of low output syndrome after pediatric heart surgery.
    Author: Zulueta JL, Vida VL, Perisinotto E, Pittarello D, Stellin G.
    Journal: J Card Surg; 2013 Jul; 28(4):446-52. PubMed ID: 23734582.
    Abstract:
    BACKGROUND: We report on the applicability of intraoperative regional oxygen saturation (rSO2) desaturation score by near-infrared spectroscopy in the early detection of postoperative low output state (LOS) in infants with congenital heart disease who underwent cardiac surgery. MATERIALS AND METHODS: Between July and October 2011 the intra- and immediate postoperative courses of 22 patients undergoing elective cardiac surgery for congenital heart disease were analyzed. The intraoperative cerebral and somatic rSO2 were measured and a rSO2 desaturation score calculated (by multiplying the rSO2 below 50% of the threshold by seconds). The aim of the study was to evaluate the applicability of intraoperative rSO2 de-saturation score in the early detection of postoperative LOS. RESULTS: Thirteen of 22 patients (62%) had an intraoperative cerebral rSO2 desaturation score >3000% per second. Patients with a rSO2 de-saturation score >3000% per second had a significantly lower intraoperative central venous saturation (SvO2, p = 0.002), cardiac index (CI, p = 0.004), oxygen availability indexed (DO2I, p = 0.0004), and a significantly higher extraction of oxygen (ERO2, p = 0.0005) when compared to patients with a rSO2 desaturation score <3000% per second. Nine patients had postoperative LOS; all of them had an intraoperative rSO2 de-saturation score >3000% per second (9/13 patients, 69%; p = 0.001) requiring prompt treatment with major inotropic support, surface hypothermia, and extracorporeal membrane oxygenation (ECMO) support (n = 4). Twenty-one patients survived. One patient died from ventricular failure and inability to wean from ECMO support. CONCLUSION: The intraoperative use of NIRS provided an early warning sign of hemodynamic or metabolic compromise, enabling early and rapid intervention to prevent or reduce the severity of potentially life-threatening complications.
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