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Test Code GLUPS Glucose, Pregnancy Diabetes Screen (GTT)

Important Note

  • Recommended time for testing is at 24-28 weeks gestation.

Performing Location

Southwestern Vermont Medical Center

Specimen Collection Information

Specimen  Min. Test Volume Collection Container Special Handling
Blood 0.1 mL Light Green (lith. heparin) top
Gold top
Marble Red top		  

Reference Ranges & Critical Values

Assay Gender Age Range Normal Range Critical Values Units
GLUPS ALL 0 Minutes – 150 Years

Borderline: 135-150 mg/dL

Positive: >150 mg/dL (Recommend gestational GTT)

Strongly Positive: >182 mg/dL (GTT optional)

 <45
>500		 mg/dL

Collection Instructions

Refer to Glucose Tolerance Protocols for additional instructions.

  1. It is recommended that the patient be fasting but this is not absolutely necessary.

  2. Have patient drink 150mL (5oz) of Dextol Glucose Tolerance Beverage containing 50 grams of glucose. Record the time.

  3. Instruct patient to remain seated and not to drink (except water), eat, or smoke until test is complete.

  4. Draw blood sample one hour from the time the Dextol was given.

Specimen Stability

3 days at 2-8°C

Day(s) Performed

Monday - Sunday

CPT

82950

LOINC

1504-0