Lab

Urine Appearance

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Urine Appearance, Urine Color, Urine Discoloration, Chromaturia, Dark Urine, Black Urine, Green Urine, Brown Urine

  • Signs
  • Cloudy urine causes
  1. Urine with high phosphate, oxalate, lipids, Urine WBCs
  2. High purine food intake (increased Uric Acid)
  • Signs
  • Brown Urine causes
  1. Gross Hematuria with renal source
  2. Bile pigment
  3. Myoglobinuria
  4. Fava beans
  5. Medications (Levodopa, Flagyl, Nitrofurantoin)
  • Signs
  • Black Urine (or dark or purple) causes
  1. Melanin
  2. Methemoglobinuria
  3. Cascara or senna
  4. Methydopa
  5. Purple Urine Bag Syndrome (PUBS)
  6. Hemolysis
  • Signs
  • Blue or Green Urine
  1. Urinary Tract Infection due to Pseudomonas
  2. Bilverdin
  3. Medications
    1. Amitriptyline, Triamterene
    2. Intravenous mendications (Cimetidine, Phenergan)
  4. Dyes
    1. Methylene blue
    2. Indigo carmine or indigo blue
  • Signs
  • Orange to yellow urine
  1. Increased urine concentration
  2. Bile pigments
  3. Phenothiazines
  4. Pyridium
  5. Carrots
  6. Tetracycline
  7. Rhubarb (red in alkaline urine)
  8. Senna (red in alkaline urine)
  1. See Red Urine