Published online June 1, 2005
PEDIATRICS Vol. 115 No. 6 June 2005, pp. 1685-1691 (doi:10.1542/peds.2004-1884)
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Randomized Trial of Liberal Versus Restrictive Guidelines for Red Blood Cell Transfusion in Preterm Infants

Edward F. Bell, MD*, Ronald G. Strauss, MD*,{ddagger}, John A. Widness, MD*, Larry T. Mahoney, MD*, Donald M. Mock, MD, PhD§,||, Victoria J. Seward, MD*, Gretchen A. Cress, RN*, Karen J. Johnson, RN*, Irma J. Kromer* and M. Bridget Zimmerman, PhD

* Department of Pediatrics
{ddagger} Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa
Department of Biostatistics, University of Iowa College of Public Health, Iowa City, Iowa
§ Department of Biochemistry and Molecular Biochemistry
|| Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas

Objective. Although many centers have introduced more restrictive transfusion policies for preterm infants in recent years, the benefits and adverse consequences of allowing lower hematocrit levels have not been systematically evaluated. The objective of this study was to determine if restrictive guidelines for red blood cell (RBC) transfusions for preterm infants can reduce the number of transfusions without adverse consequences.

Design, Setting, and Patients. We enrolled 100 hospitalized preterm infants with birth weights of 500 to 1300 g into a randomized clinical trial comparing 2 levels of hematocrit threshold for RBC transfusion.

Intervention. The infants were assigned randomly to either the liberal- or the restrictive-transfusion group. For each group, transfusions were given only when the hematocrit level fell below the assigned value. In each group, the transfusion threshold levels decreased with improving clinical status.

Main Outcome Measures. We recorded the number of transfusions, the number of donor exposures, and various clinical and physiologic outcomes.

Results. Infants in the liberal-transfusion group received more RBC transfusions (5.2 ± 4.5 [mean ± SD] vs 3.3 ± 2.9 in the restrictive-transfusion group). However, the number of donors to whom the infants were exposed was not significantly different (2.8 ± 2.5 vs 2.2 ± 2.0).

There was no difference between the groups in the percentage of infants who avoided transfusions altogether (12% in the liberal-transfusion group versus 10% in the restrictive-transfusion group). Infants in the restrictive-transfusion group were more likely to have intraparenchymal brain hemorrhage or periventricular leukomalacia, and they had more frequent episodes of apnea, including both mild and severe episodes.

Conclusions. Although both transfusion programs were well tolerated, our finding of more frequent major adverse neurologic events in the restrictive RBC-transfusion group suggests that the practice of restrictive transfusions may be harmful to preterm infants.

Key Words: anemia • brain • erythrocyte • preterm infants • transfusions

Abbreviations: RBC, red blood cell

Accepted Nov 16, 2004.




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