UW Hospital and Clinics Lab Test Directory
| Test Name: |
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Glucose Tolerance, 1 Hour
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| Test Code(s): |
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1HRGLUC / HC1HRGLUC
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| CPT Code(s): |
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82950
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| Test Description: |
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Test Component: One hour draw for glucose after administration of a glucose containing solution.
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| Methodology: |
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Hexokinase
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| Turnaround Time: |
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Stat: 1 hour.
Routine: 4 hours.
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Specimen Requirements
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| Specimen: |
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Blood
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| Patient Preparation: |
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Patient should have nothing to eat or drink (except water) for 8-10 hours before test. Exception: If patient is completing a one hour glucose challenge test for gestational diabetes, fasting is not required.
A solution containing 50 grams of glucose will be administered at the beginning of the test.
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| Collection Instructions: |
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Test available Mon-Fri, 0800-1500.
Test available Sat-Sun, 0900, at UW Hospital location only.
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| Collection Container: |
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Preferred: Green cap with yellow ring (PST)
Also Acceptable:
Green top,
Red cap with yellow ring (SST),
Red top
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| Collection Volume: |
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Preferred: 1 mL
Pediatrics: 0.3 mL
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| Sample Analyzed: |
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Plasma or serum
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| Volume Required: |
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Preferred: 0.5 mL
Pediatrics: 0.1 mL
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| Specimen Processing: |
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Centrifuge. If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial. Refrigerate.
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| Specimen Transport: |
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Transport specimen to UWHC Core Laboratory (B4/220). Transport with coolant pack if coming from outreach location.
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| Stability: |
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Ambient: 8 hours
Refrigerated: PST - 48 hrs, if off cells; SST - 4 days
Frozen: okay
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Interpretation
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| Critical Calls: |
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View
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oral glucose tolerance test
challenge test
gestational
prandial
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