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Wheeless' Textbook of Orthopaedics
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Urine analysis : Ketones


- Detects primarily Acetone & AcetoAcetic Acid, not Beta-Hydroxybutyric acid; - Positive: Starvation, High Fat Diet, DKA (See Hyperglycemia) Vomiting Diarrhea Hyperthyroidism, Pregnancy, Fever - Misc: - precise timing is essential or dipstick color change is meaningless & over timing by only 1-3 seconds will cause false elevation; - carbohydrate free diets as well as high protein and fat diets will cause ketonuria; - Medications which may cause False positive: - Levodopa - Phthalein compound - Insulin - Isopropyl alcohol - Metformin - Pyridium - Phenformin



Original Text by Clifford R. Wheeless, III, MD.