Monday - Friday, 0800 - 1700.
5 - 7 days.
1.0 mL (at least 2.0 mL preferred).
Random urine, morning specimen preferred. Freeze without preservative.
Interpretive Reference Range:
Normal < 15 mg/mg creatinine
Diagnosis of glutaric acidemia types 1 and 2.
May be elevated by medium chain triglycerides in diet.
Stable isotope dilution gas chromatography-mass spectrometry (GC/MS).