Yale New Haven Hospital

Department of Laboratory Medicine
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Glucose tolerance test, 2 hour w/ insulin

Lab Section: 

Chemistry

 

Lab Location: 

Main Lab

Test ID: 

LAB5973

 

Methodology: 

Hexokinase-UV, Chemiluminescent Immunoassay

Schedule: 

Mon-Fri: cut off 2:00 pm

Reported: 

1 hour for STAT orders; 4 hours for Routine orders

Specimen Requirements: 

Collection: 3.0 ml Blood each in a Gray Top Tube and Gold Top Tube or Heparinized Tube.
Pediatric volume: 1 ml.
Both a Gray Top Tube and Gold Top or Heparinized Tube must be drawn for each interval

 

Notes: 

Includes Baseline and 2 Hour Glucose Tolerance measurements with respective Insulin measurements at each interval

Reference Interval: 

After 75 g oral glucose load

Tests in this Panel: 

Test Name

Reference Interval

Glucose Tolerance Test 2 Hour [LRR10850]

Age Limit

Sex

Normal Range

0 Days - 999 Years

Any

Normal : <140 mg/dL

Diabetic Range: >= 200 mg/dL

Impaired Glucose Tolerance: 140-199 mg/dL

Glucose Tolerance, Baseline Insulin [LRR13767]

Age Limit

Sex

Normal Range

0 Days - 999 Years

Any

Not Established

Glucose Tolerance, 2 Hour Insulin [LRR13765]

Age Limit

Sex

Normal Range

0 Days - 999 Years

Any

Not Established

Glucose Tolerance Test Baseline [LRR10852]

Age Limit

Sex

Normal Range

0 Days - 999 Years

Any

Normal: <100 mg/dl

Diabetic Range: >= 126 mg/dl

Impaired Fasting Glucose: 100-125 mg/dl

CPT Code(s): 

00100, 82951, 83525

Last Changed: 

8/30/2017 2:27 PM

Last Reviewed: 

8/30/2017 2:28 PM