3 Hr Glucose Tolerance (Fasting,1,2,3 hour) CL GTT3

Synonyms

Allscripts (AEHR) Order Name

Glucose Tolerance, Serum 3 Hour

Sunrise Clinical Manager (SCM) Order Name

Not Orderable

Clinical Info

Test Includes: Fasting, 1 Hour, 2 Hour and 3 Hour Glucose

Specimen Type

Blood

Container

Collection Instructions

Container/Tube: Grey-top (potassium
oxalate/sodium fluoride) tube(s)
Specimen: 1 mL of potassium
oxalate/sodium fluoride plasma
Transport Temperature: Refrigerate
Collection Instructions: 1. Patient
should be instructed to have nothing to eat or drink for at least 8
hours before the test (except for sips of water).
2. Patient should be instructed to refrain from smoking and
drinking coffee just before and during test.
3. Draw blood specimen for a fasting glucose.
4. After drawing fasting specimen, give the patient a 100 g
dose of GlucolaTM (patient must
drink entire beverage within 5 minutes).
5. Draw blood specimens at 1 hour, 2 hour, and 3 hours post
GlucolaTM ingestion.
Note: Label specimens appropriately
(fasting, 1 hour, 2 hour, and 3 hour).

Transport Instructions

Refrigerate

Specimen Stability

Methodology

Enzymatic

Days Performed

TAT 1 Day

Performing Laboratory

Northwell Health Laboratories

CPT

82951

PDM

5300461

Result Interpretation

Fasting	70 -94 mg/dL
1 Hour	70-179 mg/dL
2 Hour	70 – 154 mg/dl
3 Hour	70 – 139 mg/dL

Forms