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Reference ranges for urine tests are described below: Measurement Lower limit Upper limit Unit ... Leukocytes: n/a: 0 / negative [2] See also. Reference range;
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 ...
The test for leukocyte esterase is indicative and does not replace microscopic examination of urine. [ 19 ] It is normal to find up to 3 (occasionally 5) leukocytes per high power field (40X) in a urine sample, with women having slightly higher results owing to vaginal contamination.
It normally ranges from 1.003 to 1.035; lower values indicate that the urine is dilute, while higher values mean that it is concentrated. A urine specific gravity that consistently remains around 1.010 ( isosthenuria ) can indicate kidney damage, as it suggests that the kidneys have lost the ability to control urine concentration. [ 39 ]
Bacteriuria is the presence of bacteria in urine. [1] Bacteriuria accompanied by symptoms is a urinary tract infection while that without is known as asymptomatic bacteriuria. [1] [2] Diagnosis is by urinalysis or urine culture. [3] Escherichia coli is the most common bacterium found. [1]
The value of urine for diagnostic purposes has been recognized since ancient times. Urine examination was practiced in Sumer and Babylonia as early as 4000 BC, and is described in ancient Greek and Sanskrit texts. [2] Contemporary urine testing uses a range of methods to investigate the physical and biochemical properties of the urine.
It is a useful parameter in acute kidney failure and oliguria, with a value below 1% indicating a prerenal disease and a value above 1% suggesting acute tubular necrosis or other kidney damage. [6] 2956-1: Potassium (K) – per day: 40 [5] 90 [5] mmol / 24 h: Urine K may be measured in a diagnostic examination for hypokalemia (low blood
The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.