Study Set Content:
The red color in urine is caused by:
hemoglobin and myoglobin, porphyrins, nonpathogenic
When RBCs are present, what is the appearance of urine?
The urine is red and cloudy
If hemoglobin and myoglobin is present, what is the appearance of specimen?
the specimen is red and clear
Red plasma; red urine (clear)
Hemoglobinuria
Clear plasma; reddish-brown urine (clear)
Myoglobinuria
Clear plasma; red urine (cloudy)
Hematuria
the in vivo breakdown of RBCs which is accompanied by red plasma results in what?
Hemoglobinuria
Breakdown of skeletal muscle produces:
Myoglobin
caused by porphyrins; produced from the oxidation of porphobilinogen to porphyrins; port wine color
Red
seen in acidic urine after prolonged standing
Brown/black
seen in acidic urine after prolonged standing could induce what?
(+) result in chemical test for blood
Pathologic causes of brown/black urine color
Malignant melanoma
an oxidation product of the colorless pigment, melanogen,
Melanin
True or False:
Malignant melanoma is (+) in chemical test for blood
False; (-) in chemical test for blood
A homogentisic acid, a metabolite of phenylalanine, imparts a black color to alkaline urine
from persons with the inborn-error of metabolism
Alkaptonuria
Non-pathologic or medications producing brown/black urines include:
Levodopa, methyldopa, phenol derivatives, metronidazole
caused by UTI infections; intestinal infections
Blue/Green
What specie causes UTI infections in blue/green urine
Pseudomonas
intestinal tract infections resulting in increased _________
urinary indican
non-pathologic causes of blue/green urine:
Clorets (green); methocarbamol (robaxin), methylene blue, and amitriptyline (elavil) (blue)
