Sign in →

Test Code GT5 Glucose Tolerance, 5 Hour

Important Note

Please call Hunterdon Medical Center Laboratory Outpatient Department to schedule this test.

908-237-5552

Performing Laboratory

Hunterdon Medical Center Laboratory

Special Instructions

Call Hunterdon Medical Center Laboratory at 908-237-5529 to schedule appointment.

 

Patient preparation and testing process:

  1. Patient should be fasting 10-12 hours prior to the baseline draw. Water is permitted during this time and during testing.
  2. Fasting specimen is collected and glucose level is checked prior to administration of glucose
  3. Glucose is administered:
  • Non-pregnant adult: 75 grams
  • Pregnant female: 100 grams
  • Child: calculated based on weight.

  4.   Specimens are collected at one hour intervals after the drink is finished. Including the fasting specimen, a total of six specimens will be collected for this test.

  5.  The patient will be required to stay in the Out Patient Department for the duration of the test.

Specimen Required

 

Container/Tube  
Acceptable  PST (Li Hep) Gel- Mint Green Top
Acceptable  SST
Specimen Volume  3.0mL
Minimum Volume  1.0mL

 

Note: Specimen(s) should be centrifuged within 1 hour of collection.

Specimen Type

Plasma/Serum

Specimen Transport Temperature

Ambient

Specimen Stability

 

Specimen Temperature Time Frame
Plasma Refrigerated 2-8°C 2 days
Serum-gel tube Refrigerated 2-8°C 3 days
Plasma/Serum Ambient 15-25°C 8 hours

Day(s) Test Set up

Hours of testing: Tuesday – Friday (7am -11am)

Reference Values

 

Specimen Range Units
Fasting 75-98 mg/dL
I Hour 74-179 mg/dL
2 Hour 74-139 mg/dL
3 Hour 74-106 mg/dL
4 Hour 74-106 mg/dL
5 Hour 74-106 mg/dL

Methodology

UV test. Enzymatic reference method with hexokinase.

CPT Code

82951- 3 specimens

82952-each additional specimen

Loinc Code

Fasting:1547-9

1hr: 12646-6

2hr: 12610-2

3hr: 18342-6

4hr: 29330-8

5hr: 29331-6