**Urine Myoglobin Transport Tubes (T691) are kept in Main Marshfield Labs Specimen Processing. Contact Marshfield Labs Customer Service to order special tubes - 800-222-5835.**
Collection Instructions:
1. Collect a preservative-free, random urine specimen.
2. If specimen is at ambient temperature, aliquot the urine to a urine myoglobin transport tube (T691) within 1 hour of collection. Refrigerate specimen.
3. If specimen is refrigerate, aliquot the urine to a urine myoglobin transport tube (T691) within 2 hours of collection.
Additional Information: Urinary myoglobin is highly unstable unless alkalinized with sodium carbonate preservative. Even with alkalinization, myoglobin deterioration is variable and specimen dependent (approximate averages of 10% at 1 day, 20% at 3 days, and 30% at 7 days).
Home collection of urine is not advised since urine must be transferred into Urine Myoglobin Transport Tube within 1-2 hours of collection, based on storage. Collection of urine should take place in clinic setting.