Search results
Results from the WOW.Com Content Network
Leukocyte esterase (LE) is an esterase (a type of enzyme) produced by leukocytes (white blood cells). A leukocyte esterase test (LE test) is a urine test for the presence of white blood cells and other abnormalities associated with infection. White blood cells in the urine can indicate a urinary tract infection (UTI). Positive test results may ...
Reference ranges for urine tests are described below: Measurement Lower limit Upper limit Unit ... Leukocytes: n/a: 0 / negative [2] See also. Reference range;
The urine test strip reaction is based on the action of leukocyte esterase in catalysing the hydrolysis of an ester of indolecarboxylic acid. The indoxyl that is liberated combines with a diazonium salt in order to produce a violet coloured azole dye. [21] 1) Reaction catalysed by leukocyte esterase
Urinalysis, a portmanteau of the words urine and analysis, [1] is a panel of medical tests that includes physical (macroscopic) ... Leukocyte esterase, ...
In complicated or questionable cases, it may be useful to confirm the diagnosis via urinalysis, looking for the presence of urinary nitrites, white blood cells (leukocytes), or leukocyte esterase. [54] Another test, urine microscopy, looks for the presence of red blood cells, white blood cells, or bacteria.
A urine test is any medical test performed on a urine specimen. The analysis of urine is a valuable diagnostic tool because its composition reflects the functioning of many body systems, particularly the kidneys and urinary system , and specimens are easy to obtain. [ 1 ]
In the elderly, the leukocyte esterase test is often positive even in the absence of an infection. [citation needed] The urine dipstick test is readily available and provides fast, but often unreliable results. Some organisms such as chlamydia and Ureaplasma urealyticum will produce a negative leukocyte esterase reaction.
Hemoglobinuria is a condition in which the oxygen transport protein hemoglobin is found in abnormally high concentrations in the urine. [1] The condition is caused by excessive intravascular hemolysis , in which large numbers of red blood cells (RBCs) are destroyed, thereby releasing free hemoglobin into the plasma . [ 2 ]