Collect random urine. Send 5.0 mL urine (1.0 mL minimum) refrigerated in a screw-capped plastic urine container.
Do not use preservative.
Room Temperature Unacceptable, Refrigerated 7 days, Frozen 7 days
3 days Performed Sun-Fri
Patients with greatly elevated urine myoglobin values are at risk of acute renal failure. Mildly elevated results are seen after vigorous exercise, myocardial infarct, mild muscle injury, and other conditions.