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Hematuria can be classified according to visibility, anatomical origin, and timing of blood during urination. [1] [6]In terms of visibility, hematuria can be visible to the naked eye (termed "gross hematuria") and may appear red or brown (sometimes referred to as tea-colored), or it can be microscopic (i.e. not visible but detected with a microscope or laboratory test).
For instance, cloudy or milky urine usually accompanied by bad smell possibly indicates urinary tract infection, [1] excessive discharge of crystals, fat, white blood cells, red blood cells, or mucus. [1] Dark urine that looks brown but clear might be a warning sign of a serious liver disease like hepatitis or cirrhosis.
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]
The English word urine (/ ˈ juː r ɪ n /, / ˈ j ɜːr ɪ n /) comes from the Latin urina (-ae, f.), which is cognate with ancient words in various Indo-European languages that concern water, liquid, diving, rain, and urination (for example Sanskrit varṣati meaning 'it rains' or vār meaning 'water' and Greek ourein meaning 'to urinate'). [64]
The normal number of red blood cells in urine should not usually exceed 3 per high power field. [13] A urine test strip showing positive for blood can also indicate hemoglobinuria, which is not detectable using a microscope due to the lysis of red blood cells in the urinary tract (particularly in alkaline or dilute urine), or intravascular ...
The bacteria that cause urinary tract infections typically enter the bladder via the urethra. However, infection may also occur via the blood or lymph. [7] It is believed that the bacteria are usually transmitted to the urethra from the bowel, with females at greater risk due to their anatomy. [7]
Contamination of the sample with blood from a non-urinary source, such as from menstruation or rectal bleeding, can mimic hematuria, [99] and microscopic hematuria is sometimes observed in healthy people after exercise. [98] Other causes of microscopic hematuria include UTI, kidney stones, benign prostatic hyperplasia, and trauma to the urinary ...
Hemorrhagic cystitis or haemorrhagic cystitis is an inflammation of the bladder defined by lower urinary tract symptoms that include dysuria, hematuria, and hemorrhage.The disease can occur as a complication of cyclophosphamide, ifosfamide and radiation therapy.