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Test Code LAB2280 Glucose Screen, Gestational

Collection:

Specimen: Blood 

Preferred: Lt Green w/ Gel - Li Hep

Acceptable: Serum Separator, Plain Red or Gray Top Tube

Specimen Volume: 5 mL; Minimum 1.0 mL.Fill gray tube to draw line.

 

Pediatric Collection:

One Green, Gold or Plain Red microtainer filled to 600 uL.

Stability:

Blood specimens collected in a Gray Sodium Flouride tube are stable in whole blood state for:

 

Ambient: 24 Hours

Refrigerated (preferred): 72 Hours

 

Specimens collected in a Lithium Heparin Green, Gold Serum Separator or Plain Red should be separated from red cells ASAP to avoid loss of analyte concentration. Once serum/plasma is separated from cells:

 

Ambient: 8 Hours

Refrigerated (preferred): 1 Week

Frozen: 2 Weeks

Turn Around Time (TAT):

STAT: 1 HOUR

Routine: 4 HOURS

Test Availability:

24 hours a day / 7 days a week

Reference Interval:

No established reference range

Interpretive Data:

Screening of gestational diabetes on the basis of 1 hour Oral Glucose Tolerance Tests (OGTT) with 50 gram glucose load.


If one hour glucose is >139 mg/dl, pursue three hour OGTT (100 gram glucose load)

Additional Test Codes

GTT 1 HR

Performing Laboratory Section

Chemistry / UMC MAIN LABORATORY