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Urine Storage Issues

Changes in urine after 1 hour at room temperature

TermDefinition
Clarity Urine becomes cloudy as crystals precipitate and bacteria multiply
Color May change if pH becomes alkaline
pH Becomes alkaline as bacteria form ammonia from urea
Glucose Decreases as it is metabolized by bacteria
Ketones Decreases because of evaporation
Bilirubin and urobilinogen Undergo degradation in light
Blood May hemolyze; false-positive results are possible because of bacterial enzymes
Nitrite Test result may change from negative to positive as bacteria multiply and reduce nitrates to nitrites
Casts Lyse or dissolve in alkaline urine
Cells Lyse or dissolve in alkaline urine
Bacteria Multiply twofold approximately every 20 minutes
Yeasts Multiply
Crystals Precipitate as urine cools; may dissolve if pH changes
Created by: cskinner
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