OBJECTIVE: Preterm infants often need red blood cell (RBC) transfusions. The aim of this study was to determine whether haemoglobin levels before transfusion were associated with regional cerebral tissue oxygen saturation (r(c)SO(2)) and fractional tissue oxygen extraction (FTOE) and whether RBC transfusions were associated with r(c)SO(2) and FTOE during the 24-h period thereafter. DESIGN: Prospective observational cohort study. SETTING: Third level neonatal intensive care unit. PATIENTS: Thirty-three preterm infants (gestational age 25-34 weeks, birth weight 605-2080 g) were included. INTERVENTIONS: None. MAIN OUTCOME MEASURES: R(c)SO(2) was measured during a 1-h period, before, 1 h after and 24 h after a 15 ml/kg RBC transfusion in 3 h. Using r(c)SO(2) and transcutaneous arterial oxygen saturation (tcSaO(2)) values, FTOE was calculated: FTOE=(tcSaO(2)-r(c)SO(2))/tcSaO(2). Results Forty-seven RBC transfusions were given. R(c)SO(2) and FTOE correlated strongly with haemoglobin before transfusion (r=0.414 and r=-0.462, respectively, p<0.005). TcSaO(2) did not correlate with haemoglobin before transfusion. 24 h after transfusion, r(c)SO(2) increased from a weighted mean of 61% to 72% and FTOE decreased from a weighted mean of 0.34 to 0.23. The decrease in FTOE was strongest in the group with haemoglobin below 6.0 mmol/l (97 g/l). The decrease in FTOE was already present 1 h after transfusion and remained unchanged at 24 h after transfusion. CONCLUSION: Following RBC transfusion, cerebral tissue oxygen saturation increases and FTOE decreases. The data suggest that cerebral oxygenation in preterm infants may be at risk when haemoglobin decreases under 6 mmol/l (97 g/l).
OBJECTIVE: Preterm infants often need red blood cell (RBC) transfusions. The aim of this study was to determine whether haemoglobin levels before transfusion were associated with regional cerebral tissue oxygen saturation (r(c)SO(2)) and fractional tissue oxygen extraction (FTOE) and whether RBC transfusions were associated with r(c)SO(2) and FTOE during the 24-h period thereafter. DESIGN: Prospective observational cohort study. SETTING: Third level neonatal intensive care unit. PATIENTS: Thirty-three preterm infants (gestational age 25-34 weeks, birth weight 605-2080 g) were included. INTERVENTIONS: None. MAIN OUTCOME MEASURES: R(c)SO(2) was measured during a 1-h period, before, 1 h after and 24 h after a 15 ml/kg RBC transfusion in 3 h. Using r(c)SO(2) and transcutaneous arterial oxygen saturation (tcSaO(2)) values, FTOE was calculated: FTOE=(tcSaO(2)-r(c)SO(2))/tcSaO(2). Results Forty-seven RBC transfusions were given. R(c)SO(2) and FTOE correlated strongly with haemoglobin before transfusion (r=0.414 and r=-0.462, respectively, p<0.005). TcSaO(2) did not correlate with haemoglobin before transfusion. 24 h after transfusion, r(c)SO(2) increased from a weighted mean of 61% to 72% and FTOE decreased from a weighted mean of 0.34 to 0.23. The decrease in FTOE was strongest in the group with haemoglobin below 6.0 mmol/l (97 g/l). The decrease in FTOE was already present 1 h after transfusion and remained unchanged at 24 h after transfusion. CONCLUSION: Following RBC transfusion, cerebral tissue oxygen saturation increases and FTOE decreases. The data suggest that cerebral oxygenation in preterm infants may be at risk when haemoglobin decreases under 6 mmol/l (97 g/l).
Authors: Ursula Guillén; James J Cummings; Edward F Bell; Shigerharu Hosono; Axel R Frantz; Rolf F Maier; Robin K Whyte; Elaine Boyle; Max Vento; John A Widness; Haresh Kirpalani Journal: Semin Perinatol Date: 2012-08 Impact factor: 3.300
Authors: Thomas Alderliesten; Jill B De Vis; Petra Ma Lemmers; Jeroen Hendrikse; Floris Groenendaal; Frank van Bel; Manon Jnl Benders; Esben T Petersen Journal: J Cereb Blood Flow Metab Date: 2016-07-20 Impact factor: 6.200
Authors: Thomas Alderliesten; Laura Dix; Wim Baerts; Alexander Caicedo; Sabine van Huffel; Gunnar Naulaers; Floris Groenendaal; Frank van Bel; Petra Lemmers Journal: Pediatr Res Date: 2015-09-21 Impact factor: 3.756