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
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
Chemical Pathology
Section
Automation
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