Glucose, Fasting

General Information

Lab Name: Glucose, Fasting
Lab Code: GLUF
Epic Name: Glucose, Fasting
Description: This test can be ordered as the fasting time point in the 2-hour oral glucose tolerance test recommended by the ADA for non-OB patients or as a stand-alone fasting glucose. For the 2-h glucose tolerance test, a fasting specimen should be drawn and sent for GLUF; then the patient should drink 75 g glucola, and after two hours have a specimen drawn and sent for GLUPP2. A fasting blood glucose concentration equal to or greater than 126 mg/dL is consistent with a diagnosis of diabetes. Diabetes Care 2016 39: S13-S22
Synonyms: glucose tolerance
Components

Method

Spectrophotometric

Reference Range

Units: mg/dL

Effective date: 03/01/2015

Ref. Range Notes

Upper limit is based on ADA guidelines for diagnosis of diabetes using a fasting glucose measurement. See above for website.

Specimen Type: Blood
Collection: HMC, UW-MT, and UW-NW Onsite Locations:
Preferred: 4 mL blood in LIME GREEN PST tube
Also Acceptable: 4 mL blood in ORANGE RST, GOLD SST, RED TOP, GREEN TOP or GREY TOP tube
Pediatric: 1 Full LIME GREEN MICROTAINER

Offsite Clinic or Other Locations:
Preferred: 4 mL blood in GOLD SST tube
Also Acceptable: 4 mL blood in ORANGE RST, LIME GREEN PST, RED TOP, GREEN TOP or GREY TOP tube
Pediatric: 1 Full LIME GREEN MICROTAINER
Quantity: Requested: 0.5 mL plasma/serum
Minimum: 0.1 mL plasma/serum

Receiving Instructions: Refrigerate plasma/serum

Note: Plasma or serum collected in green, gold or red top tubes should be separated from the cells within 1 hr. and stored refrigerated. Glucose in such specimens is stable up to 16 hr. after collection. Glucose specimens collected in gray top tubes are stable up to 24 hr. without separation or refrigeration.

Lab Department

Chemistry, Automated Panels(CHA)

Frequency

Daily

Available STAT?

Yes

Performing Location(s)

HMC	Chemistry, Automated 206-520-4600 325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-NW	Main Lab 206-668-1344 UW Medical Center – Northwest 1550 N 115th Street, A200 Seattle, WA 98133
FHCC	Fred Hutch Alliance Lab 206-606-1088 825 Eastlake Ave, Seattle, WA 98109
UW-MT	Chemistry, Automated 206-520-4600 Clinical Lab, Room NW220, University of Washington Medical Center, 1959 NE Pacific street, Seattle, WA 98195
FHCC	Fred Hutch Community Lab, Evergreen Campus 425-441-2640 10240 NE 128th St Kirkland, WA 98034