Test Overview
Test Methodology

Hexokinase, NADH endpoint

Test Usage

Determine glucose levels, on cystic fibrosis patients

Reference Range *

Fasting <100 mg/dL; 1 hr <200 mg/dL; 2 hr <140 mg/dL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Details
Days Set Up
Daily, 24 hours
Analytic Time

2 hours

Soft Order Code
GL2CF
MiChart Code
Glucose, Serum, 2 hour for Adult CF patients
Synonyms
  • OGTT (2 hr-75g) Adult CF
  • OGTT (2 hr-75g) Adult CF
  • Glucose Tolerance 2 hour for Adult CF patients
Laboratory
Clinical Core Laboratory
Section
Clinical Chemistry
STAT Availability

STAT requests for this test will be performed on a STAT basis (supervisory staff approval is not required)

Specimen Requirements
Collection Instructions

Collect blood in an SST tube from a fasting patient. Administer 75 gm Glucola. Instruct patient to finish drinking the Glucola within 5 minutes of the time he or she starts drinking and not to eat anything except a few sips of water after finishing the Glucola. Collect blood in an SST tube exactly 1 and 2 hours after the patient finished drinking the Glucola. Centrifuge within 4 hours of collection, aliquot serum into a plastic vial and refrigerate. If specimen cannot be centrifuged at client site, please arrange for delivery to MLabs within 3 hours of specimen collection. Label vials appropriately (Fasting and 1 HR and 2 HR).

Normal Volume

0.5 mL serum

Minimum Volume

0.25 mL serum

Billing
CPT Code
82951
Fee Code
20521
LOINC
Glucose, Serum, 2 hours for Adult CF patients LOINC 1558.6: GLF Glucose, Fasting for CF patients LOINC: 20438-8 GL60 Glucose, 1-hour GTT for CF patients LOINC: 25667-7 GL120 Glucose, 2-hour for CF patients
NY State Approved
No