Methodology
Gas Chromatography-Mass Spectrometry (GC-MS)
Synonyms
Glycerate; Glycolate; Oxalate; PH1; PH2; 4-hydroxy-2-oxoglutarate; HOG; HOGA1; PH3
Specimen Type
Urine, Random
Performing Lab
Mayo Medical Lab
Epic ID
Other Reference Test
Lab Test Days
Varies; Batched 2 x per Month; 8 A.M.
Standard TAT
14 Days
Collection Information
Specimen Required
1.1-10 mL Urine
Container Type
Sterile Container
Collection Instructions
Fasting overnight 12-14 hours. Have patient void the first-morning specimen, then collect specimen within 2 hours of first-void while patient continues to fast. Fluids are allowed. No preservative. Immediately freeze specimen.
Processing Information - Lab Use Only
Transport Temperature
Frozen-Only
Specimen Stability
Room Temp: Unacceptable; Refrigerated: 14 Days; Frozen: 90 Days (Preferred)
Test Volume Required
10 mL Urine
Minimum Test Volume
1.1 mL Urine
CPT Codes
82544
Revised
12-21-17
Initials
SL