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- W2003442007 abstract "In the present study, we evaluated the leukocyte esterase (LE) area of a reagent strip designed for urinalysis for the semiquantitative measurement of the percentage of polymorphonuclear neutrophils (PMNs) in BAL fluid.Prospective. The relative PMN counts (obtained by conventional microscopy and expressed as a percentage of a 500 cell count) of consecutive BAL fluid samples were compared with the corresponding LE categories as read with a urine chemistry reader. LE categories were graded as follows: negative, trace, +, + +, and + + +.A total of 153 BAL fluid samples were included. The mean PMN counts of the negative LE category (4.1 +/- 4.3%; n = 43) and the + + + category (81.8 +/- 16.3%; n = 37) differed significantly from each other and from the mean PMN counts of the other categories. Within the trace, +, and + + categories, a considerable overlap of PMN counts was noted. Assignment of a BAL fluid to the negative LE category consistently predicted a PMN count < 20%. At a threshold value of 50% PMNs, the + + + LE category predicted the BAL fluid samples to the correct group (PMNs > 50% vs < 50%) with a sensitivity of 70.8% and a specificity of 97.1%.The reagent strips proved to be useful as a rapid test for semiquantitative measurement of the relative PMN counts in BAL fluid. However, the low predictive value for the exclusion of a high PMN count may limit their application." @default.
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- W2003442007 date "2000-11-01" @default.
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- W2003442007 title "Correlation of Leukocyte Esterase Detection by Reagent Strips and the Presence of Neutrophils" @default.
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- W2003442007 doi "https://doi.org/10.1378/chest.118.5.1450" @default.
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