Lymphocyte subsets in inline filtered packed red blood cell units: comparison between low and high spin procedures.
Lymphocyte subsets were determined in 20 packed red blood cell units (PRC) before and after filtration (FPRC) with the Pall Leukotrap RC inline filter system; 10 units were prepared by low spin and platelet rich plasma (PRP) removal (Group A) and 10 with high spin, plasma and buffy-coat (BC) removal (Group B). Flow cytometry was employed for white blood cell (WBC) enumeration and phenotype analysis. Median WBCs in prefiltered units was 2.08 x 10(9) (Group A) vs. 0.8 x 10(9) (Group B) (p < 0.0001). Five Group A and three Group B filtered units had WBC counts above the limit of detection (LD), median values being 25.59 and 3.08 x 10(3), respectively. Whereas CD3+, CD3+CD4+ and CD3+CD8+ lymphocyte subsets were assessable in 20-40% of Group A units, inline filtration of Group B units lowered lymphocytes below the LD of the present study. Post-filtration CD19+ lymphocytes were below the LD in all the 20 units.
Mascaretti
Luca
L
Blood Transfusion Center, Azienda Ospedaliera San Gerardo, Servizio Immunotrasfusionale, Monza, Italy. l.mascaretti@hsgerardo.org
Baggi
Laura
L
Riva
Mariarosa
M
Proserpio
Patrizia
P
Dassi
Maria
M
Varallo
Filippo
F
Sciorelli
Gianalfredo
G
Quarti
Cinzia
C
D015703:Antigens, CD / Q000032:analysis; D001800:Blood Specimen Collection; D002469:Cell Separation / Q000379:methods* / Q000592:standards*; D002498:Centrifugation / Q000379:methods; D017707:Erythrocyte Transfusion / Q000592:standards; D004912:Erythrocytes / Q000166:cytology*; D005374:Filtration / Q000379:methods; D005434:Flow Cytometry; D006801:Humans; D016130:Immunophenotyping; D007958:Leukocyte Count / Q000295:instrumentation / Q000379:methods; D016131:Lymphocyte Subsets / Q000166:cytology*
D015703:Antigens, CD