Study Set Content:
varies from almost colorless to black.
Color
These color variations may be due to:
metabolic functions, physical activity, ingested materials, & pathologic conditions
Normal Urine Color
Pale yellow, Yellow, & Dark Yellow
The yellow color of urine is caused by the presence of a pigment called
Urochrome and small amounts of urobilin and uroerythrin
True or False:
Urine should be examined under a good light source against a white background.
True
A lipid-soluble pigment present in plasma; product of endogenous metabolism; produced by the body at constant rate
Urochrome
Production of urochrome is increased in:
thyroid conditions, fasting states, urine standing in room temperature
most evident in specimens that have been refrigerated, resulting in the precipitation of amorphous urates
Uroerythrin
An oxidation product of the normal urinary constituent urobilinogen; orange to brown pigment
Urobilin
caused by bilirubin; detected in chemical examination; appearance of yellow foam when shaken; may indicate hepatitis
Dark Yellow/Amber
The photo-oxidation of large amounts of excreted urobilinogen to urobilin also produces a what color in urine?
Yellow-orange
Photo-oxidation of bilirubin imparts a yellow-green color to the urine caused by the presence of what
Biliverdin
yellow-orange specimen caused by the administration of what substance to people who have urinary tract infections
Phenazopyridine or azo-gantrisin
It produces a yellow foam when shaken
Phenazopyridine
caused by photo-oxidation of bilirubin to biliverdin
Yellow green
Usually indicates the presence of blood (hematuria)
Red/Pink/Brown
Red is the usual color that blood produces in urine, but the color may range from pink to
brown, depending on what factors:
Amount of blood, pH of urine, length of contact
turns brown after several hours
Acidic urine
indicates glomerular bleeding
Fresh urine
appear red brown
alkaline urine
