Glucose Prenatal, 3 hour

Last Modified: 10/22/2021 8:39:22 AM

Medical Necessity Documentation:  
Client Notes:

Collections performed at Parkview Outpatient Service Center, Parkview Huntington, Parkview Whitley and selected patient service centers around the Fort Wayne area Labs

Patient Preparation:
12 hour Fasting

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: 1.0 mL Plasma in a PST Mint Green Top Tube - Li Heparin (One For Each Timed Collection)
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 100 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. 

Specimens must be spun within 4 hours of collection
Minimum Volume: 0.2 mL
Transport & Storage: Temperature/Stability: 3 days Refrigerated

4 hours Unspun
Reference Range:

Fasting: 70 - 95 mg/dL
1 hour: 120 - 180 mg/dL
2 hour: 70 -155 mg/dL
3 hour: 70 - 140 mg/dL

Critical Ranges:  
Test Comments:  
Methodology: Enzymatic
Clinical Significance:  
Documentation: For tolerance comparisons refer to the PHL Glucose Tolerance Comparison Sheet in Addendum A
Custom Panel: No


Days Performed: Monday, Tuesday, Wednesday, Thursday, Friday
Sites Performed: Parkview Dekalb, Parkview Hospital Randallia, Parkview Huntington, Parkview LaGrange, Parkview Noble, Parkview Regional Medical Center, Parkview Wabash, Parkview Warsaw , Parkview Whitley
PHL Test Code: GLB3
EPIC Test Code: LAB2419
Alternate Test Names: 3 hour Prenatal GTT; Gestational Diabetes 3 hour Tolerance; Glucose Prenatal, 3 hour Tolerance
Included Tests: 1 hour Glucose; 2 hour Glucose; 3 hour Glucose; Fasting Glucose
CPT Coding: 82951, 82952

Go back to the top of the page.