Sign in →

Epic Code LAB1230102 Glucose Tolerance, 2 hour test, 75g (Non-Gestational)

Important Note

  • This test is recommended and only available for NON-PREGNANT patients.
  • Fasting specimen required -  A fasting glucose specimen will be drawn.

Test Name Alias

Glucose tolerance 2 hr Test (Lab only) Glucose | 2 hr, Glucose Tolerance | Glucose | O9221  | GTT | OGTT | 178

Interface Order Alias

1230102

Ordering Instructions

  • This test is recommended and only available for NON-PREGNANT patients.
  • The patient must be fasting for this test. No caloric or caffeine intake for at least 8 hours. Do not drink (other than water), eat, smoke, chew gum, candy, cough drops, etc. for at least 8 hours prior to blood tests.
  • For safety and accuracy of testing, patients are encouraged to have Oral Glucose Tolerance Tests (OGTT) performed at one of our Outpatient Service Centers.
  • GlucoCrushTM, the glucola drink used in Spectrum Health Grand Rapids Laboratory does not contain gluten.

Collection Instructions

  • A fasting glucose specimen will be drawn.
  • The patient is given a 75 gram oral glucose load.
    • Pediatric patients under 95 lbs: Use the following calculation to determine the amount of glucola to be administered: 2.4 x Body weight in lbs = mL of 100g Glucola to administer
  • A second specimen is drawn two hours later.
  • GlucoCrushTM, the glucola drink used in Spectrum Health Grand Rapids Laboratory does not contain gluten.

 

Specimen Collection: Blood

 

Container(s): 4.5 mL Mint Green Top (Lithium Heparin Gel) or 5.0 mL Gold Top (Serum Separator-SST Gel)

  • Preferred Volume to Collect: 4.5 mL
  • Minimum Volume to Collect: 1.0 mL
  • Neonate Volume to Collect: 0.5 mL
  • Capillary collect ok? Yes
  • Microtainer acceptable: Yes

 

 

Collection Instructions:

  • Fasting specimen required
  • After collection, gently invert tube 8-10 times.
  • Specimen should be processed within 2 hours – See Processing Instructions.

 

Processing Instructions (Laboratory, Outpatient or Off-site collection)

  • Processed Specimen: Plasma or Serum
  • Centrifuge/Spin: Yes
  • Aliquot: Yes
  • Processing Instructions:
    • Plasma is preferred specimen type
    • Green Tube/Plasma: Centrifuge after collection.
    • Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours.
    • Minimum plasma/serum volume: 0.5 mL
  • Transport Temperature: Refrigerate

Specimen Stability

Ambient: 8 hours

Refrigerate: 72 hours

Frozen: aliquot plasma/serum for longer storage

Laboratory Retention: 72 hours

Test Frequency

Available daily, usual TAT 1 day.

Reference Range

Female
65 – 140 mg/dL

 

Diagnosis determined by interpretive criteria

Performing Department

CHEMISTRY

Methodology

Enzymatic

CPT

82950-LAB-GLUCOSE 2 HOUR PST
82947-LAB-GLUCOSE

CDM Code

4054227, 4058320

Epic Test ID

1230100114

LOINC

Currently not available

Beaker LOINC

GLUCOSE 2 HR FOR NON GESTATIONAL 2 HR GTT 75G: N/A
HEMOLYSIS INDEX: N/A

Reviewed Date

3/5/2020

Beaker Names

Beaker Procedure Name: NON GESTATIONAL 2 HR GTT 75G
Beaker Display Name: Glucose Tolerance 75g, 2 Hour (Non-Gestational)
BEAKER TEST NAME: GLUCOSE 2 HR FOR NON GESTATIONAL 2 HR GTT 75G
BEAKER TEST REPORT NAME: Glucose 2 Hr for Non Gestational 2 Hr GTT 75g

Beaker Synonyms

No synonym on file

Beaker Location, Container and Temperature

BW CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BL CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
BR CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
GM CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
KL CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
KL CHEMISTRY: GOLD TOP SST TUBE R (Acceptable)-Refrigerated
LH CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
PH CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
RC CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
UN CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated
ZH CHEMISTRY: GREEN LI HEPARIN PST TUBE R (Preferred)-Refrigerated