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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]
Reference ranges for urine tests are described below: Measurement Lower limit Upper limit ... per High Power Field (HPF) RBC casts: n/a 0 / negative [2] White blood ...
The interpretation of urinalysis takes into account the results of physical, chemical and microscopic examination and the person's overall condition. Urine test results should always be interpreted using the reference range provided by the laboratory that performed the test, or using information provided by the test strip/device manufacturer. [136]
Hemosiderinuria (syn. haemosiderinuria) is the presence of hemosiderin in urine. [1] It is often the result of chronic intravascular hemolysis, in which hemoglobin is released from red blood cells into the bloodstream in excess of the binding capacity of haptoglobin. The function of haptoglobin is to bind to circulating hemoglobin, thereby ...
The urine test strip test for blood is based on hemoglobin's pseudo peroxidase activity in catalysing a reaction between hydrogen peroxide and the chromogen tetramethylbenzidine in order to produce a dark blue oxidation product. [6] [13] the resultant colour can vary between green and dark blue depending on the amount of hemoglobin. [13]
Even then, I had to bring a urine sample to the hospital on the day of my surgery for the lab to perform a single analysis: a pregnancy test. The physician’s task is to be absolutely sure that ...
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 ]
A urine dipstick test may also give an incorrect positive result for hematuria if there are other substances in the urine such as myoglobin, a protein excreted into urine during rhabdomyolysis. A positive urine dipstick test should be confirmed with microscopy, where hematuria is defined by three or more red blood cells per high power field. [6]