Four-color flow cytometric immunophenotypic determination of peripheral blood CD4+ T-lymphocyte counts: a comparison of validity and cost-effectiveness with a two-color method.
The clinical usefulness of monitoring CD4+ T-lymphocyte counts in patients infected with HIV is now well established. The need for accurate, rapid, and cost-effective methods for making these determinations is evident. Recent technologic advances have allowed for the development of a system for the determination of CD4+ T-lymphocyte counts by simultaneous 4-color flow cytometry. A new 4-color 2-tube flow cytometric method for analyzing CD4+ T-lymphocyte subsets in whole blood was compared with a standard 2-color 5-tube method. The new method provides results almost identical to those of the well-established 2-color method used in our clinical laboratory. Statistical analyses indicate very low variability in CD4+ counts between the 2 methods, strongly supporting the usefulness of this new procedure. In addition, the 4-color procedure provides a 15% reduction in the materials cost per test compared with the 2-color method, as well as a marked reduction in the time expenditure of flow cytometry technologists.
Kutok
J L
JL
Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.
Roma
A O
AO
Lemire
S J
SJ
Dorfman
D M
DM
D000328:Adult; D000368:Aged; D018791:CD4 Lymphocyte Count / Q000379:methods*; D002469:Cell Separation / Q000379:methods; D003116:Color; D003362:Cost-Benefit Analysis; D005260:Female; D005434:Flow Cytometry / Q000191:economics* / Q000379:methods*; D006801:Humans; D016130:Immunophenotyping / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012044:Regression Analysis