Honors Urinalysis Home Middle Aged Woman Case Study Teenage Boy Case Study |
Middle-Aged Woman with Dark Urine | ||||||||||||||||||||||||
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6. Foods such as red beets cause urine to be dark red. How can the laboratory professional rule this out as a source of false positive on the stix? Beets will cause urine to be dark red, which could cause pads such as urobilinogen to be a false positive. If the urine had been so dark it colored everything, then it would have colored all reagent pads as well. If only the urobilinogen is deeply colored, it is possible to report out the results and be confident they are not falsely positive due to color contamination. A 35 year old woman went to the doctor complaining of fatigue, shortness of breath, and dark urine. Her skin was very pale, and the whites of her eyes were slightly yellow. She reported recently having a sinus infection which was treated with penicillin. Urinalysis results are:
Microscopic amorphous 2+ hemosiderin granules present Upon receiving the urinalysis results, the physician orders a blood test for haptoglobin which comes back less than 5 mg/dL (reference range = 26-185 mg/dL). |