Proven Diagnostics Test Catalog
2 HOUR GLUCOSE TOLERANCE, 75 GM |
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Test code: |
NOCODE3 |
Specimen type: |
Plasma |
Tube type / collection container: |
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Specimen collection notes: |
Specimens must be collected on a time schedule (fasting and 2 hour). |
What to submit: |
1 mL aliquot of plasma for each time interval; minimum 0.2 mL for each time interval. |
Patient preparation: |
Dietary preparation of a 150 gm carbohydrate meal 12-16 hours prior to beginning test; 75 gm challenge dose of glucose given immediately after collection of the fasting specimen. |
Specimen Processing Instructions: |
Centrifuge at 1100-2000 g for a minimum of 10 minutes. 1 mL aliquot of plasma for each time interval. |
Transport temperature: |
Refrigerated (preferred). |
Specimen stability: |
Room temperature: 8 hours. Refrigerated: 3 days. |
Rejection criteria: |
Stability limits exceeded. |
Reference range: |
Fasting plasma glucose (GLUFP): Normal 70-99 mg/dL, impaired tolerance 100-125 mg/dL, abnormal diabetic > or = 126 mg/dL. 2-hour post challenge (PCG): Normal 90-139 mg/dL, impaired tolerance 140-199 mg/dL, abnormal diabetic > or = 200 mg/dL. |
Alert limits: |
Glucose below 45, above 500 mg/dL. |
Additional information: |
None. |
CPT code(s): |
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| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided are based on AMA guidelines and are for informational purposes only. | |
| When performed: |
Daily, Monday - Sunday |
Test includes: |
Fasting plasma glucose (GLUFP) and 2-hour post-challenge glucose(PCG) |
Methodology: |
Spectrophotometric (Colorimetric)
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Clinical Significance: |
This test is used for the routine diagnosis of diabetes in the non-pregnant adult. |
