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HelpTest Code LAB5419 Protein, Total, 12 Hour, Night, Urine
Additional Codes
| Test Name in EPIC | EPIC Test Code | Mnemonic |
|---|---|---|
| PROT UR 12H NITE | LAB5419 | U12NT |
Useful For/Utility
Evaluation of renal disease
Screening for monoclonal gammopathy
Screening for postural (orthostatic) proteinuria
In select clinical situations, collection of a 12-hour specimen may allow more rapid detection of proteinuria states (eg, screening pregnant patients for preeclampsia)
Methodology
Benzethonium Chloride
Clinical Information
The role of the renal system in the conservation of plasma proteins has been recognized for some time. Under normal physiological conditions small molecular weight proteins, such as insulin, pass through the glomeruli in relatively large amounts. Intermediate size proteins, such as transferrin and albumin, also pass through in relatively small amounts. Most of these proteins are reabsorbed in the renal tubules.2, 3Most CSF protein originates by diffusion from plasma across the blood-CSF barrier. Elevated levels occur as a result of increased permeability of the blood-CSF barrier or with increased local synthesis of immunoglobulins.
Specimen Requirements
Specimen Type: Urine, 12 hour
Container/Tube: Aliquot tube
Specimen Volume: 5 mL
Specimen Minimum Volume: 2 mL
Collection Instructions:
1. No preservative. Mix well before taking aliquot.
2. See Urine Collection in Special Instructions for timed urine collection instructions.
Additional Information: Starting and ending times of collection and 12 hour volume are required.
Performing Laboratory
Measure 12 hour volume. Enter volume and hours of collection into LIS. If specimen is cloudy, spin and separate supernatant. Refrigerate specimen until analysis is performed.
Specimen Transport Temperature
Refrigerate 5 days/Frozen OK/Ambient 24 hours OK
Day(s) Test Set Up
Monday through Sunday
Performing Laboratory
Chemistry-
St. Joseph's - Baxter Clinic Lab, St. Joseph's - Brainerd Clinic Lab, St. Joseph's Medical Center Lab
Ashland Clinic Lab, Deer River Hospital Lab, Ely Clinic Lab, Hibbing Clinic Lab, International Falls Clinic Lab, Moose Lake Hosptial Lab,SMDC Clinical Lab, St. Mary's Hospital - Superior Lab, Virginia Hospital Lab
Fargo Hospital Lab, St. Mary's - Detroit Lakes Hospital Lab
Test Classification and CPT Coding
84156
Reference Values
No established reference values