Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 1 de 1
Filter
Add more filters










Database
Language
Publication year range
1.
Ther Drug Monit ; 27(6): 766-9, 2005 Dec.
Article in English | MEDLINE | ID: mdl-16306852

ABSTRACT

The comparison between the MEIA II and the EMIT assays for tacrolimus measurement and the interference by the hematocrit were evaluated in 93 samples from routine therapeutic monitoring at tacrolimus concentrations less than 9 microg/L (group A). Additionally, the incidence of false-positive results were determined in samples (n=46) from patients who were not receiving the drug (group B). In group A, no statistical differences were observed between the mean+/-SD values obtained by MEIA II (5.14+/-2.28 microg/L) and EMIT (4.61+/-1.79 microg/L). The correlation coefficient and the regression equation (95% CI) between both assays, were 0.761 and EMIT=1.088 (0.90, 1.35) MEIA II -0.38 (-1.65, -0.46), respectively. When the samples were stratified according to the hematocrit, the median differences between the methods (MEIA II minus EMIT) were as follows: hematocrit35%, 0.25 microg/L (P=0.02). In group B, false-positive results (above the detection limit) were observed in 63.04% of samples analyzed by MEIA II and in 2.17% of samples analyzed by EMIT. The median differences in apparent tacrolimus results were significantly higher in the samples with the lowest hematocrit: 2.2 microg/L, 1.4 microg/L, and 0.0 microg/L in samples with hematocrit35%, respectively. In conclusion, the differences in the tacrolimus results obtained by MEIA and EMIT assays were higher in samples from patients with hematocrit less than 25%, and the MEIA assay demonstrated a high incidence of false-positive results.


Subject(s)
Hematocrit , Immunoassay/methods , Tacrolimus/blood , Drug Monitoring/methods , Drug Monitoring/trends , Enzyme Multiplied Immunoassay Technique/trends , Enzyme-Linked Immunosorbent Assay/methods , Enzyme-Linked Immunosorbent Assay/trends , Humans , Immunoassay/trends , Immunosuppressive Agents/blood , Immunosuppressive Agents/immunology , Immunosuppressive Agents/therapeutic use , Predictive Value of Tests , Reproducibility of Results , Tacrolimus/immunology , Tacrolimus/therapeutic use
SELECTION OF CITATIONS
SEARCH DETAIL
...