Glucose Tolerance, 2 Hour (Bariatric OB Patients only)

Message

Performing Lab: Central Lab, Hudson, Lakeview, Regions, Sartell, Westfields

Test Code

RH0353

Alias/See Also

Sunquest: GL2T; Glucose 2 hr tolerance for bariatric OB, Bariatric OB 2 hour post prandial glucose

CPT Codes
82947

Preferred Specimen

0.2 mL Lithium Heparin Plasma (light green-top) tube

Minimum Volume

0.1 mL

Other Acceptable Specimens

Serum separator (gold-top), Lithium Heparin (light green-top) on ICE, Red, Red/Gray

Instructions

These patients should NOT be given the glucola drink, but should consume a 400-500 calorie meal 2 hours before the blood sample is collected. Use the following link to be referred to the “Pregnancy After Bariatric Surgery” OB guideline for further information, including sample meal options.http://mypartner.healthpartners.com/cs/idcplg?IdcService=GET_FILE&RevisionSelectionMethod=LatestReleased&noSaveAs=1&Rendition=Web&dDocName=PDWCS_201338

Processing:
Centrifuge specimens and removed from cellular material within 30 minutes to avoid metabolism of glucose by cells.

Transport Temperature

Refrigerated

Specimen Stability

Room Temperature: 24 hours
Refrigerated: 7 days
Frozen: 1 year

Lakeview: Room Temperature (8 hours), Refrigerated (3 days)

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Samples not removed from cellular material within 30 minutes, hemolysis

Methodology
Colorimetric or Bichromatic Endpoint (Lakeview)

Setup Schedule

Hospital: Daily
Clinics: Monday - Friday

Report Available

Same day

Reference Range

70 - 140 mg/dL
Critical Low: <= 50 mg/dL
Critical High: >= 450mg/dL

Clinical Significance

During pregnancy, about 4% of women with no prior history of diabetes will develop gestational diabetes. Although it can occur at any time, most cases will develop during the later part of the pregnancy. If increased blood sugar levels in the pregnant woman are uncontrolled, they can cause the fetus to increase in size and weight. They can also cause the baby to be born with very low glucose levels and to have breathing difficulties. Most women are checked for gestational diabetes between 24 and 28 weeks of pregnancy. For those with gestational diabetes, diet control and/or insulin injections throughout the rest of the pregnancy may be required to bring glucose levels down to normal levels. In most cases, gestational diabetes will go away after delivery, but women who have gestational diabetes will be at an increased risk of having it again with subsequent pregnancies and of developing type 2 diabetes in the future.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.