Preparing small-dose red cell concentrates (RCCs) for neonatal and pediatric transfusions: Impact of RCC volume, storage, and irradiation.

Background: Preparing small-dose red cell concentrates (RCCs) is a common practice for pediatric and neonatal transfusions. However, there is a lack of quality monitoring data to indicate that both the preparation and storage of small-dose RCCs does not alter in vitro red cell quality. The present study seeks to provide data to support this practice.

Babesia microti in a Canadian blood donor and lookback in a red blood cell recipient.

Background And Objectives: We describe the third documented case of autochthonous human babesiosis in Canada and the second in a Canadian blood donor.

Materials And Methods: Multiple laboratory investigations were carried out on the donor and the immunocompromised recipient of an associated, potentially infectious red blood cell product.

Results: The donor had not travelled except for outdoor exposure in south-eastern Manitoba, followed by illness and hospital admission.

Electronic patient identification for sample labeling reduces wrong blood in tube errors.

Background: Wrong blood in tube (WBIT) errors are a preventable cause of ABO-mismatched RBC transfusions. Electronic patient identification systems (e.g.

Resolving variable maternal D typing using serology and genotyping in selected prenatal patients.

Background: RhIG prophylaxis for D- pregnant women prevents hemolytic disease of the newborn and typically depends on results of serologic D typing. Interpretation and follow-up of weak D serology is variable. Recent recommendations promote genotyping for RHD status determination in those with weak D serology.

Weak D type 67 in four related Canadian blood donors.

Correct donor D typing is critical to prevent recipient alloimmunization. No method can detect all variants, and the immunogenicity of many variants is unknown. Routine ABO and D serologic typings are performed in our laboratory by automated microplate testing.

The prevalence of anti-K in Canadian prenatal patients.

Background: Anti-KEL1(K) is a major cause of hemolytic disease of the fetus and newborn. We utilized data from prenatal testing of patients in Western Canada to determine the frequency of anti-K. In Manitoba, we evaluated the frequency of transfusion as the likely cause for alloimmunization.

West Nile virus in Canadian blood donors.

Background: Blood donation screening for West Nile virus (WNV) RNA by nucleic acid testing (NAT) was implemented in Canada in July 2003, and 14 WNV RNA-positive donations were identified. Samples were screened in minipools of six donations with a WNV assay (TaqScreen, Roche). Two of the donors were identified by single-donor screening that was initiated in the province of Saskatchewan, which had the highest prevalence of WNV in the country, in early September 2003.