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Urinalysis, a portmanteau of the words urine and analysis, [1] is a panel of medical tests that includes physical (macroscopic) examination of the urine, chemical evaluation using urine test strips, and microscopic examination.
Ascorbic acid (vitamin C) is known to interfere with the oxidation reaction of the blood and glucose pad on common urine test strips. Some urine test strips are protected against the interference with iodate, which eliminates ascorbic acid by oxidation. [25] Some test strips include a test for urinary ascorbate.
Reference ranges for urine tests are described below: Measurement Lower limit Upper limit Unit Urinary specific gravity: 1.003 [1] [2] 1.030 [1] [2] g/mL Urobilinogen:
The G6PD deficiency test is a common laboratory test. Because oxalic acid is produced during metabolism of vitamin C, hyperoxaluria can be caused by intravenous administration of ascorbic acid. [20] Vitamin C administration may also acidify the urine and could promote the precipitation of kidney stones or drugs in the urine. [20]
Excretion (via urine) is as ascorbic acid and metabolites. The fraction that is excreted as unmetabolized ascorbic acid increases as intake increases. In addition, ascorbic acid converts (reversibly) to DHA and from that compound non-reversibly to 2,3-diketogulonate and then oxalate. These three metabolites are also excreted via urine.
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 ]
For forced acid diuresis, ascorbic acid is sometimes used. Ammonium chloride has also been used for forced acid diuresis, but it is a toxic compound. [ 6 ] Usually, however, this technique only produces a slight increase in the renal clearance of the drug.
Urine organic acids is a medical diagnostic test that measures organic acid metabolites in the urine. The metabolites can come from host cells or from flora. The metabolites can come from host cells or from flora.