Abstract
Organ perfusion and regional tissue oxygen saturation (rSO2) can be measured non-invasively using near-infrared spectroscopy (NIRS). While cerebral NIRS monitoring in neonates has been widely used, the adoption of renal NIRS is still evolving. This narrative review explores the application of renal NIRS in neonates and proposes an algorithm for integrating renal and cerebral NIRS in the neonatal intensive care unit. Decreased renal regional oxygenation (RrSO2) suggests decreased renal O2 delivery/perfusion or increased O2 consumption, warranting evaluation for acute kidney injury, anemia, hemodynamically significant patent ductus arteriosus, or hypotension. Increased RrSO2 indicates increased renal O2 delivery/perfusion or decreased O2 consumption, necessitating assessment for hyperoxia or established kidney injury. Combining cerebral and renal NIRS provides a comprehensive evaluation, allowing for the detection of early clinical changes. This integrated monitoring approach holds promise for improving neonatal outcomes. However, further large-scale studies are needed to establish normal ranges and guide therapeutic interventions.
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DR designed the study, drafted the initial manuscript, and critically reviewed and revised the manuscript. HC, and EA, critically reviewed and revised the manuscript. MED conceptualized and designed the study, and critically reviewed and revised the manuscript for important intellectual content. All authors approved the final manuscript as submitted and agreed to be accountable for all aspects of the work.
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Rallis, D., Christou, H., Abdulhayoglu, E. et al. A narrative review of the clinical applications of renal NIRS and integration with cerebral NIRS in the NICU. J Perinatol 45, 1655–1663 (2025). https://doi.org/10.1038/s41372-025-02303-3
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DOI: https://doi.org/10.1038/s41372-025-02303-3
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