Gestational Glucose Tolerance

Specimen Container

1 gray or gold

Specimen Collection Type

Serum or plasma

Minimum Volume To Collect (Ml)

1 mL

Specimen Preparation

Separate <24 hrs

Stability

Ambient Stability: 72 hrs
Refrig Stability: 7 days
Frozen Stability: 7 days

Preferred Transportation Temperature

REFRIGERATED

Remarks

Gray (Potassium Oxalate/Sodium Fluoride):
Room temperature: 72 hours,
Refrigerated: 72 hours,
Frozen: 7 days
All other specimen types:
Room temperature: 8 hours,
Refrigerated: 72 hours,
Frozen: 7 days

Performed

Sun-Sat

Reported

Same day

Methodology

Hexokinase/G-6-PDH

Lab Department

Core

Testing Location

IHC

Synonyms

Blood Glucose
Blood Sugar
GLU
GTT
Oral Glucose Tolerance Test
Fasting 1 Hour Glucose
1 Hour GTT
1 HR GTT
Gestational Diabetes Screen

Test OR Panel

Test

AOE

IsPregnant

Misc Instructions

Separate plasma from Gray (Potassium Oxalate/Sodium Fluoride) from cells within 24 hours
Separate plasma/serum from Green PST (Lithium Heparin), Dark Green (Sodium or Lithium Heparin), Red (Serum) or Gold (SST) within 30 minutes. Collect blood 1 hour after patient consumes a 50 gram glucose dose
Patient should remain seated during the one hour wait period

Unit of Measurement

mg/dL

CPT Codes

82950

LOINC

20438-8

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