Since urine typically does not contain red blood ... serial labs (hematocrit and hemoglobin), and repeat imaging are often ...

Medically reviewed by Matthew Wosnitzer, MD Polyuria occurs when your body produces too much urine, which is typically considered more than 3 liters of urine a day for adults. It refers specifically ...

which in turn reduces methemoglobin to hemoglobin. In doing this the methylene blue is oxidized to the blue form again and eliminated by the body, turning urine blue. Since the blue color disappears ...