Glucose
Abbrev Code: | GLU | ||
Order Code: | LAB3502 | Order Name: | Glucose |
Order Instructions: | UMMC: For stat/conditional newborn recheck of critically LOW glucose by meter, order GLUCW and collect in capillary tube. | ||
Synonyms: | Two Hour Postprandial | ||
Methodology: | Roche: UV Test: Enzymatic reference method with hexokinase
Vista: Bichromatic endpoint Woodwinds: Hexokinase |
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CPT Codes: | 82947 x1, 82947 x1 | ||
Turnaround Time: | Performed and reported 24 hours/day. | ||
Special Instructions: | Glucose will decrease 5 -10 mg/dL/hour in an unprocessed tube as a result of glycolysis. Collection in a gray top (NaF + K-oxalate) tube will halt glycolysis after 2 hours and preserve the glucose level for 24 hours. | ||
Associated Links: |
Collection Instructions
Specimen: | Blood |
Optimal Volume: | 2.5 mL |
Minimum\Peds Volume: | 0.6 mL |
Collection Instructions: | Chemistry Tests Containers Chart |
Patient Preparation: | Instructions
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Causes for Rejection: | Specimen not separated from cells within 2 hours of collection (4 hours for Home Health specimens). Gray top tube not received within 24 hours of collection. |
Processing and Shipping
Specimen Processing: | Process within 2 hours (4 hours for Home Health specimens). Centrifuge and aliquot 1.25 mL, 0.2 mL minimum. Store in refrigerator. |
Shipping Instructions: | Ship at refrigerated temperature. |
Stability: | Roche and Vista: Once separated from cells: 8 hours at room temperature; 72 hours refrigerated. |
Test Performed at or Referral Lab | Chemistry (Clinics, CSC Maple Grove, Roche-CSC Mpls, Roche-Grand Itasca, Roche-Lakes, Roche-Northland, Roche-Range, Roche-Ridges, Roche-Southdale, Roche-St. John's, Roche-UMMC East, UMMC/UMMCH-West Bank, Woodwinds) |
Interpretive
Critical Range: | Basic, Electrolyte and Renal Panels Critical Values and Reference Ranges | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Reference Range: | Basic, Electrolyte and Renal Panels Critical Values and Reference Ranges | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Use: |
While either a fasting glucose or oral glucose tolerance test (OGTT) can be used to diagnose pre-diabetes or diabetes, the ADA recommends the fasting glucose because it is easier, faster and less expensive to perform. A fasting glucose level between 100 and 125 mg/dL signals pre-diabetes or impaired fasting glucose (IFG). A patient with a fasting glucose level of 126 mg/dL or higher has diabetes. A two-hour glucose level between 140 and 199 mg/dL on the OGTT signals pre-diabetes or impaired glucose tolerance (IGT). If the two-hour glucose level is 200 mg/dL or higher, the patient has diabetes. Patients with IFG and/or IGT now are referred to as having “pre-diabetes,” indicating their relatively high risk for developing diabetes. For more information, see http://www.diabetes.org/about-diabetes.jsp
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