Glucose tolerance, 3 hr gestational

Alphabetical Test listing

Glucose tolerance, 3 hr gestational-118

  
Glucose tolerance, 3 hr gestational
  
118
  
LAB118
  
GG3
  
GTT
  

To aid in the diagnosis of gestational diabetes

  

Fasting is required prior to sample collection

Fasting for a blood test

  
Lithium heparin (Li hep) plasma
  
  
1.0 mL
  
  1. Draw a fasting specimen.
    • If the fasting glucose is >126, cancel the testing as not indicated and notify the ordering physician
  2. Give fasting patient 100 gm glucose solution
    • Must be consumed within 10 minutes
  3. Draw specimens at 1, 2 and 3 hours
  4. Label each with the time and hour collected
  

Spin

  

Lt green plasma separator (PST)

  
Serum
Sodium fluoride (Na Fl) whole blood or plasma
Sodium heparin (Na hep) plasma
EDTA plasma
  

Gold - Spin

Dk green/lavender - Spin and separate

Grey - If a grey top tube will not reach the Central Laboratory within 24 hours of collection, it should be spun down, and the plasma transferred to an AHL False Bottom Plasma/Serum Transport Tube labeled as "NaFl plasma". Additional testing cannot be added on to this sample.

  

Gold serum separator (SST) tube

Grey Sodium flouride (NaFl) or

False bottom plasma/serum transport vial/tube (AHL)

  

Serum/plasma

Refrigerated - 7 days

NaFl whole blood

Refrigerated - 24 hours

 

  
  • Improper labels (unlabeled or mislabeled)
  • Hemolysis (some procedures)
  • Improper anticoagulant or ratio
  • Delay in transport
  • Improper storage temperature affecting results
  • Inappropriate timing of collection
  • Improper container
  • Leaking container resulting in compromised specimen
  • Quantity not sufficient (QNS)
  
AHL - Chemistry: C
  
Daily
  
1 day
  

Hexokinase

  

 

Collection Range
Fasting 65 - 95 mg/dL
1 hour 65 - 180 mg/dL
2 hour 65 - 155 mg/dL
3 hour 65 - 140 mg/dL
  
82951
82952
  
11/30/2001
  
03/26/2019
  
02/10/2020