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Epic Code LAB2111082 Glucose Tolerance, 1 hour test, 50 g (Gestational Diabetes Screen)

Important Note

This is a non-fasting test.

This test is recommended and only available as a screen for PREGNANT patients at 24-28 weeks gestation. The patient is given a 50 gram oral glucose load and blood is drawn one hour later.

For outpatient collection: Providers please instruct patient to arrive at least 90 minutes prior to the lab closing to ensure there is enough time to complete the test. LINK: List of Laboratory Locations and Hours

Test Name Alias

Glucose 1 hr Post 50 g | Glucose Tolerance | Glucose | GTT | OGTT | 8040

Interface Order Alias

10146

Ordering Instructions

This test is recommended and only available as a screen for PREGNANT PATIENTS at 24-28 weeks gestation.

 

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.

Specimen Requirements

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

Capillary collect ok? Yes

Microtainer acceptable: Yes

 

Collection Instructions:

  • Avoid hemolysis
  • 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
  • Processes Minimum Volume: 0.5 mL Plasma or Serum
  • Processing Instructions:
    • Plasma is preferred specimen type
    • Green Tube/Plasma: Centrifuge within 1 hour 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: Refrigerated

 

GlucoCrushTM, the glucola drink used in Spectrum Health Grand Rapids Laboratory does not contain gluten.

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 – 135 mg/dL

Performing Department

CHEMISTRY

Performing Department Laboratory Location

Spectrum Health Regional Laboratory, Grand Rapids, MI
Spectrum Health Big Rapids Laboratory, Big Rapids, MI
Spectrum Health Blodgett Laboratory, Grand Rapids, MI
Spectrum Health Gerber Laboratory, Fremont, MI
Spectrum Health Kelsey Laboratory, Lakeview, MI
Spectrum Health Ludington Laboratory, Ludington, MI
Spectrum Health Pennock Laboratory, Hastings, MI
Spectrum Health Reed City Laboratory, Reed City, MI
Spectrum Health United Laboratory, Greenville, MI
Spectrum Health Zeeland Laboratory, Zeeland, MI

Methodology

Enzymatic

CPT

82950-LAB-GLUCOSE 1 HOUR TOTAL

CDM Code

4058040

Epic Test ID

1230100719

LOINC

Glucose 1Hr PP: 1504-0

Beaker LOINC

GLUCOSE 1HR POST 50 GRAMS: 10449-7

Reviewed Date

11/23/2021

Beaker Names

Beaker Procedure Name: GLUCOSE 1 HOUR POST 50 G
Beaker Display Name: Glucose Tolerance, 1 hour test, 50 g (Gestational Diabetes Screen)
BEAKER TEST NAME: GLUCOSE 1 HOUR POST 50 G
BEAKER TEST REPORT NAME: Glucose 1 hour Post 50 g

Beaker Synonyms

No synonym on file

Beaker Location, Container and Temperature

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