Resumen
Introducción: la anemia neonatal en recién nacidos prematuros (RNPT) es frecuente y la transfusión es uno de los tratamientos de elección; sin embargo, se ha asociado al desarrollo de enterocolitis necrotizante (ECN).
Objetivo: comparar la saturación regional de oxígeno (rSO2) y la fracción excretada de oxígeno tisular (FTOE) basal, durante y al final de la transfusión en RNPT con anemia.
Material y métodos: estudio prospectivo, observacional, longitudinal y analítico. Se incluyeron RNPT de 28-36 semanas de edad gestacional (SEG) que ingresaron a una unidad de cuidados intensivos neonatales (UCIN) con base en los criterios de transfusión de los Canadian Blood Services. Se midió la rSO2, una hora antes, durante y hasta una hora después de la transfusión.
Resultados: se analizaron 20 RNPT, 3 (15%) niñas y 17 (85%) niños, de 33 SEG (RIC 28-36), edad postnatal de 31 días (RIC 15-50) y peso de 1815 g (RIC 1385-2520). Se analizaron los valores de rSO2 antes, durante y después de la transfusion de eritrocitos 45.5% (RIC 38.25-60.25), 53.3% (RIC 44.25-64) y 53.5% (RIC 50.0-64.25), respectivamente, F = 5.76, p = 0.006, power = 0.83, gl = 2; los valores de FTOE mostraron 0.50 (RIC 0.31-0.56), 0.42 (RIC 0.30-0.50) y 0.39 (RIC 0.27-0.45), respectivamente, F = 3.53, p = 0.03, power = 0.62, gl = 2.
Conclusión: las mediciones mesentéricas de rSO2 incrementaron y las de FTOE disminuyeron paulatinamente, previo, durante y después de la transfusión de eritrocitos, sin mostrar correlación con la hemoglobina previa a la transfusión.
Abstract
Background: Neonatal anemia (NA) in premature newborns (PTNB) is common and transfusion is one of the treatments of choice; however, it has been associated with the development of necrotizing enterocolitis (NEC).
Objective: To compare regional oxygen saturation (rSO2) and fraction of tissue oxygen excretion (FTOE) at baseline, during and at the end of transfusion in PTNBs with anemia.
Material and methods: Prospective, observational, longitudinal, and analytical study. PTNBs of 28-36 weeks of gestational age (WGA) admitted to a Neonatal Intensive Care Unit (NICU) and with transfusion criteria of Canadian Blood Services were included. rSO2 was measured one hour before, during and up to one hour after transfusion.
Results: 20 PTNBs were analyzed, 3 (15%) girls and 17 (85%) boys, aged 33 WGA (IQR 28-36), postnatal age 31 days (IQR 15-50), and weight of 1815 g (IQR 1385-2520). The rSO2 values before, during and after erythrocyte transfusion were 45.5% (IQR 38.25-60.25), 53.3% (IQR 44.25-64.0) and 53.5% (IQR 50.0-64.25), respectively, F = 5.76, p = 0.006, power = 0.83, DF = 2; FTOE values were 0.50 (IQR 0.31-0.56), 0.42 (IQR 0.30-0.50), and 0.39 (IQR 0.27-0.45), respectively, F = 3.53, p = 0.03, power = 0.62, DF = 2.
Conclusion: Mesenteric rSO2 measurements increased and FTOE decreased gradually before, during and after erythrocyte transfusion, without showing correlation with pretransfusion hemoglobin.
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