Using direct antiglobulin test results to reduce unnecessary cold agglutinin testing.
Transfusion
; 57(6): 1480-1484, 2017 06.
Article
em En
| MEDLINE
| ID: mdl-28266038
ABSTRACT
BACKGROUND:
Cold agglutinin disease (CAD) is a rare autoimmune hemolytic anemia mediated by autoantibodies that preferentially react at 4°C. Laboratory testing for cold-reactive autoantibodies is laborious and may not be ordered judiciously, particularly in patients with a negative direct antiglobulin test (DAT). We sought to determine whether a negative DAT using anti-human complement (anti-C3) rules out elevated cold agglutinin (CA) titers and the diagnosis of CAD. STUDY DESIGN ANDMETHODS:
We performed a retrospective study of patients with a CA test performed at three major academic medical centers Barnes-Jewish Hospital (2003-2014), Vanderbilt University Medical Center (2007-2009), and Massachusetts General Hospital (2009-2014).RESULTS:
This study included 801 patients, of whom 51% (n = 410) had a DAT within the 7 days before CA testing. A total of 98% of patients with a negative DAT using anti-C3 had a negative CA titer (<64). Only five subjects had a negative DAT using anti-C3 and an elevated CA titer.CONCLUSIONS:
Overutilization of CA testing could be reduced by establishing laboratory acceptance criteria based on a positive DAT using anti-C3. Such acceptance criteria would have reduced CA testing by 68% for those with an available DAT result.
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Teste de Coombs
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article