Lab
Urine Occult Blood
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Urine Occult Blood
, Urine Dipstick Blood
See Also
Microscopic Hematuria
Adult Microscopic Hematuria Causes
Hematuria in Adults
Hematuria in Children
Interpretation
Normal
Negative
Interpretation
Positive (
Urine Dipstick
with blood)
Dipstick blood must be confirmed with microscopic exam
See
Microscopic Hematuria
for confirmatory exam
Diagnosis of
Microscopic Hematuria
: 3 RBCs/hpf
Causes
False Positive
occult blood on
Urine Dipstick
Dehydration
Exercise
Hemoglobinuria
Myoglobinuria
Non-urinary tract blood source (e.g.
Menses
)
Alkalotic urine (pH >9)
Causes
False Negative
occult blood on
Urine Dipstick
Captopril
Vitamin C
supplementation
Increased
Urine Specific Gravity
Urine pH
5.0 or less
Proteinuria
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