Document Detail

The age of red blood cells in premature infants (ARIPI) randomized controlled trial: study design.
MedLine Citation:
PMID:  19056034     Owner:  NLM     Status:  MEDLINE    
Despite recent trends in decreasing transfusion thresholds and the development of technologies designed to avoid allogeneic exposure, allogeneic red blood cell (RBC) transfusions remain an important supportive and life-saving measure for neonatal intensive care patients experiencing illness and anemia. Reluctantly, a number of laboratory and observational studies have indicated that the amount of time RBCs are stored can affect oxygen delivery to tissues. Consequently, older RBCs may result in higher rates of organ dysfunction, nosocomial infection, and lengths of stay. Because of such harmful effects, an evaluation of the association between age of blood and nosocomial infection and organ dysfunction is warranted. The aim of the study was to determine if RBCs stored for 7 days or less (fresh RBCs) compared to current standard transfusion practice decreases major nosocomial infection and organ dysfunction in neonates admitted to the neonatal intensive care unit and requiring at least one RBC transfusion. This study is a double-blind, multicenter, randomized controlled trial design. The trial will be an effectiveness study evaluating the effectiveness of stored vs fresh RBCs in neonates requiring transfusion. Neonatal patients requiring at least one unit of RBCs will be randomized to receive either (1) RBCs stored no longer than 7 days or (2) standard practice. The study was conducted in Canadian university-affiliated level III (tertiary) neonatal intensive care units. The primary outcome for this study will be a composite measure of major neonatal morbidities (necrotizing enterocolitis, retinopathy of prematurity, bronchopulmonary dysplasia, intraventricular hemorrhage, and mortality). Secondary outcomes include individual items of the composite measure and nosocomial infection (bacteremia, septic shock, and pneumonia). The sample size calculations have been estimated based on the formula for 2 independent proportions using an alpha of .05, a (1-beta) of .80, and a 10% noncompliance factor. The baseline rate for our composite measure is estimated to be 65% as indicated by the literature. Assuming a 15% absolute risk reduction with the use of RBCs stored 7 days or less, our estimated total sample size required will be 450 (225 patients per treatment arm). The Age of Red Blood Cells in Premature Infants (ARIPI) trial is registered at the US National Institutes of Health ( no. NCT00326924 and current controlled trials ISRCTN65939658.
Dean Fergusson; Brian Hutton; Debora L Hogan; Louise LeBel; Morris A Blajchman; Jason C Ford; Paul Hebert; Ashok Kakadekar; Lajos Kovacs; Shoo Lee; Koravangattu Sankaran; Stan Shapiro; John A Smyth; Kuppuchipalayam Ramesh; Nicole Rouvinez Bouali; Alan Tinmouth; Robin Walker
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Publication Detail:
Type:  Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Transfusion medicine reviews     Volume:  23     ISSN:  1532-9496     ISO Abbreviation:  Transfus Med Rev     Publication Date:  2009 Jan 
Date Detail:
Created Date:  2008-12-05     Completed Date:  2009-06-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8709027     Medline TA:  Transfus Med Rev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  55-61     Citation Subset:  IM    
Ottawa Health Research Institute, Ottawa, Ontario, Canada.
Data Bank Information
Bank Name/Acc. No.:; ISRCTN/ISRCTN65939658
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MeSH Terms
Blood Preservation*
Erythrocyte Transfusion*
Infant, Newborn
Infant, Premature*
Infant, Premature, Diseases / therapy*
Time Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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