Sign in →

Growth Hormone Suppression with Glucose Tolerance Test

Important Note

Male or non-pregnant female
Draw fasting Glucose specimen & finger stick glucose

Draw fasting Growth Hormone and fasting Insulin-Like Growth Factor-1
Give 75 gram glucola

Collect blood at the following intervals:

          1 hour Glucose and Growth Hormone specimens
          2 hour Glucose and Growth Hormone specimens

Icon & Photos

Grey Potassium Oxalate--For Glucose

Gold Top (SST-Gel)--For Growth Hormone and Insulin-Like Growth Factor-1

 

Specimen Requirements

Preferred: (for each Glucose)
Container/Tube: Grey Potassium Oxalate
Minimum Volume: 1.0 mL
Collection Instructions:
Also Acceptable:
Container/Tube: Mint Green Top (Lithium Heparin Gel)

 

Preferred: (for each Growth Hormone)

Container/Tube: Gold Top (SST-Gel)

Minimum Volume: 0.6 mL

Also Acceptable:

Container/Tube:  Other SST Gel, Red Top Tube

 

Preferred: (for Insulin-Like Growth Factor-1)

Container/Tube: Plain Red Top-NO GEL

Minimum Volume: 0.3 mL

Also Acceptable:

Container/Tube: SST Gel Tube

Specimen Stability

Glucose:

Ambient: 8 hours
Refrigerate: 48 hours
Frozen: aliquot for longer storage

 

See Growth Hormone-Mayo

 

See Insulin-Like Growth Factor 1-Mayo

Reference Range

Fasting Glucose:  70 - 91 mg/dL

1 Hour Glucose:  70 - 179 mg/dL

2 Hour Glucose:  70 - 152 mg/dL

 

See individual tests for Growth Factor-Mayo and Insulin-Like Growth Factor 1-Mayo.

CPT

82951

84305

83033 x3