Methylmalonic Acid, Amniotic Fluid
Availability: Mon. - Fri., 0800 - 1700
Turnaround Time: 2 - 3 days.
Minimum Volume: 2.0 mL.
Specimen Handling: Cell-free supernatant required. Send frozen. Include two controls of same
gestational age (14-16 weeks) with patient sample, all labeled blind (i.e. numbers but no names).
Consultation required before sending specimens.
Interpretive Reference Range: Normal <105 nanograms/mL.
Use: Diagnosis of methylmalonic acidemias.
Methodology: Stable isotope dilution gas chromatography-mass
spectrometry (GC/MS).
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Page updated 11/9/2009
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