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Fructosamine [8340]
MessageFor Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.
Test Code
FRUCT
Alias/See Also
8340
CPT Codes
82985
Preferred Specimen
1 mL serum collected in a serum separator tube (SST®)
Minimum Volume
0.5 mL
Other Acceptable Specimens
Plasma collected in: sodium or lithium (green-top), or EDTA (lavender-top) tube
Instructions
Plasma: Separate from cells prior to submission.
Transport Container
Plastic screw-cap vial
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Serum:
Room Temperature = 5 days
Refrigerated = 14 days
Frozen = 60 days
Plasma:
Room Temperature = 72 hours
&nbs
Room Temperature = 5 days
Refrigerated = 14 days
Frozen = 60 days
Plasma:
Room Temperature = 72 hours
&nbs
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis • Moderately icteric
Methodology
Spectrophotometry (SP)
Setup Schedule
Set up: Mon-Fri a.m., p.m., and nights; Report available: Next day
Limitations
Patients with low albumin concentrations may exhibit depressed levels of fructosamine.
Reference Range
205-285 umol/L
Clinical Significance
The fructosamine assay is useful in monitoring the degree of glycemia over short-to-intermediate time frames (1-3 weeks). A fructosamine concentration greater than the established normal range is an indication of prolonged hyperglycemia of 1-3 weeks or longer. The higher the fructosamine value, the poorer the degree of glycemia control.
Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153
Last Updated: November 29, 2021