UCRC - Urine Creatinine Clearance
Serum Creatinine, Urine Creatinine
Specimen Collection Requirements
Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube, AND Urine, 20.0 mL aliquot of a 12 or 24 hour urine collection.
Allow serum to clot completely at room temperature (minimum: 30 minutes). Preferably, separate serum or plasma from cells before transport. Urine: 12 or 24 hour collection container refrigerated (2-8°C). Submit patient’s height, weight and total volume of a 12 or 24 hour collection in the requisition.
1.0 mL serum or plasma AND 20.0 mL aliquot of urine
0.5 mL serum or plasma AND 2.0 mL aliquot of urine
Serum or Plasma: grossly hemolyzed specimens
SERUM OR PLASMA: Lithium heparin tubes (PST) are stable up to 7 days refrigerated on the primary spun gel tube AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 24 hours; Refrigerated (2-8°C): 7 days; Frozen (at or below -20°C): 1 month. URINE: Ambient (20-25°C): 2 days; Refrigerated (2-8°C): 6 days; Frozen (at or below -20°C): 1 month
Samaritan Health Services Laboratories
Age, weight and sex adjusted ranges. Corrected for body surface area.
FEMALE: 80-110 mL/min/1.732
Thursday, January 5, 2017 03:42:05 AM