Glucose Diabetes Screening

Overview

  • EPIC Code:
  • LAB2335
  • Soft Test Code:
  • GTTDM
Alternate Names
  • 2 hour Glucose Tolerance Test w/out 1 hour
  • 2 hour GTT w/out 1 hour
  • Diabetes Screening
  • Glucose Diabetes Panel
Included Tests

2 hour Glucose; Fasting Glucose


Specimen Collection & Preparation

Patient Preparation

12 hours fasting prior to collection

Smoking, drinking, gum chewing, mints, cough drops, etc. are not allowed prior to or during the duration of the test

Small amounts of water are allowed after the 1-hour specimen has been collected. 

Medications may still be taken as ordered by the physician.


Specimen Requirements:

-OR-

1.0 mL Plasma in a PST Mint Green Top Tube - Li Heparin (One For Each Timed Collection)
Minimum Volume:
0.25 mL Plasma*

* This volume does not allow for repeat testing

Collection Instructions:

If patient has fasting test(s) ordered, they must be collected prior to administering Glucola beverage.

If possible, medications should be noted on the order

1. Collect Fasting Specimen
2. Administer the 75 grams of Glucola beverage by having the patient consume the beverage within 5 minutes
3. Start timing the test after the patient has finished the drink.
4. Collect subsequent  timed specimens will be drawn at specific time intervals, based on the test ordered

Collection hour must be included on the specimen label along with patient’s full legal name, a unique identifier (the unique identifier may be the DOB or the requisition number), date and time of collection, and the phlebotomist’s initials.


For Child Glucola Dosages refer to Addendum A


Processing Instructions:

Centrifuge and separate from cells within 4 hours of collection


Transport and Storage:
  • Ambient (18-24°C): 8 Hours
  • Refrigerated (2-8°C): 3 Days

Clinical Interpretation

Reference Range:

Refer to report for reference ranges


Methodology:
  • Enzymatic
Documentation

For tolerance comparisons, refer to the PHL Glucose Tolerance Comparison Sheet in Addendum A


Production Schedule

Sites Performed
  • Parkview DeKalb Hospital
  • Parkview Huntington Hospital
  • Parkview Kosciusko Hospital
  • Parkview LaGrange Hospital
  • Parkview Noble Hospital
  • Parkview Randallia Hospital
  • Parkview Regional Medical Center
  • Parkview Southwest
  • Parkview Wabash Hospital
  • Parkview Whitley Hospital
Days Performed
Monday
Tuesday
Wednesday
Thursday
Friday
Departments
  • Chemistry
Turn Around Time

Same day/next day


Coding & Compliance

CPT Coding

82947, 82950


Medical Necessity May Apply