Insulin Response to Glucose, 3 hour

Overview

  • EPIC Code:
  • LAB2298
  • Soft Test Code:
  • ITOL3
Alternate Names
  • Insulin Response to Glucose, 3 hour - No Glucose
  • Insulin Tolerance Test - 3 hour
Included Tests

1 hour Insulin; 2 hour Insulin; 3 hour Insulin; Fasting Insulin


Specimen Collection & Preparation

Client Notes

Please remind patients of the time frame this testing will take, and that they need to be at the drawsite in plenty of time before closing.

On the PRMC Campus, tolerance collections are performed at Parkview Outpatient Center, 11141 Parkview Plaza Drive, Suite 100 Fort Wayne, IN 46845 Entrance 3


Patient Preparation

Fasting

Patient should discontinue taking Biotin, Vitamin B7, or Vitamin H 48 hours before getting blood drawn.


Specimen Requirements:

-OR-

1.0 mL Serum in a SST Gold Top Tube (One For Each Insulin Timed Collection)
Minimum Volume:
0.25 mL Serum per specimen*

* This volume does not allow for repeat testing

Collection Instructions:

Instruct patients that they CANNOT share glucola beverage with anyone as it is for diagnostic purposes. 

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

For Child Glucola Dosages refer to Addendum A


Processing Instructions:

Centrifuge tubes and separate from cells within 2 hours


Transport and Storage:
  • Ambient: 4 Hours
  • Refrigerated: 2 Days

Clinical Interpretation

Reference Range:

Refer to report for reference ranges


Test Comments:

Patients taking vitamin supplements containing doses of > 5 mg/day may have falsely decreased test results generated.


Methodology:
  • Immunometric Assay

Production Schedule

Sites Performed
  • Parkview Regional Medical Center
Days Performed
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Departments
  • Chemistry
Turn Around Time

Same day/next day


Coding & Compliance

CDM

01423525 x 4


CPT Coding

83525 x 4