LABORATORY CORRELATION OF URINE COLOR Flashcards
cause of colorless urine color
recent fluid consumption
it is commonly observed with random specimens
colorless caused by recent fluid consumption
caused by Polyuria or diabetes insipidus, Diabetes mellitus, Dilute random specimen
pale yellow color
increased 24 hour volume and low specific gravity
caused by polyuria or diabetes insipidus, pale yellow
elevated specific gravity and positive glucose test result
caused by diabetes mellitus
recent fluid consumption
caused by dilute random specimen, pale yellow
may be normal after strenuous exercise or in first morning specimen
caused by concentrated specimen, dark yellow
fever or burns
caused by dehydration
yellow foam when shaken and positive chemical test results for bilirubin
Bilirubin
Negative bile test results and possible green fluorescence
caused by acriflavine, dark yellow
antibiotic administered for urinary tract infections
caused by nitrofurantoin
(+) foam test, (+) chem test to
bilirubin
Bilirubin, Orange
Possible green fluorescence; (-)
bile test
Acriflavine, Orange
(+) orange foam and thick
orange pigment
Pyridium,
Rifampicin, Orange
(+) colored foam
Bilirubin oxidized
to biliverdin, Yellow green
Yellow brown
(+) urine culture
Pseudomonas
infection, Green
Antidepressant
Amitriptyline, Blue Green
Muscle relaxant, may be
green-brown
Methocarbamol, Blue Green
Bacterial infections (P.
aeruginosa)
Indican, Blue Green
Cloudy urine with (+) chemical
test results for blood and RBCs
visible microscopically
RBCs, Pink
Clear urine with (+) chemical
test results for blood;
intravascular hemolysis
Hemoglobin, Red
Clear urine with (+) chemical
tests for blood, muscle damage
Myoglobin, Red
(-) chemical test results for
blood
Porphyrins, Red
Tuberculosis medication
Rifampicin, Red
Cloudy specimen with RBC,
mucus and clots
Menstrual
contamination
Seen in acidic urine after
standing; (+) chemical test for
blood Glomerular bleeding
RBCs oxidized to
methemoglobin, Brown
Due to uroerythrin
that attaches to
amorphous urate
when stored in
refrigerator
Brown and
pink color
Denatured hemoglobin
Methemoglobin, Black
Seen in alkaline urine after
standing
Homogentisic
acid, Black
Interferes with copper reduction
test
Phenol
Derivatives, Black
Darkens on standing
Metronidazole, Black
Genetic disorder of
phenylalanine and tyrosine
metabolism
Melanuria
Alkaptonuria, Black
