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Lactose Tolerance 2 Hour

Performing Laboratory

MBMC Main Laboratory

Methodology

UV-Hexokinase

Specimen Requirements

For outpatients, call Missouri Baptist Medical Center Customer Service and ask for Phlebotomy Supervisor.  This is to coordinate when the patient comes in and confirm supplies are in place upon arrival.

 

Specimen Type: Plasma
Container/Tube: Mint-green top (lithium heparin gel)
Specimen Volume: Full tube
Specimen Minimum Volume: 0.25 mL
Collection Instructions:

1. Obtain lactose from Core Laboratory.

2. Have patient ingest 50 grams of lactose.

3. Draw blood at 15-, 30-, 60-, 90-, and 120-minutes post ingestion.

Additional Information: Label specimens appropriately (corresponding draw times).

Specimen Transport Temperature

Ambient

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: within 4 hours

Reference Values

Normal: ≥20 to 30 mg/dL increase in glucose level over fasting level

Intolerant:

Critical values (automatic call-back)

<55 or > 450 mg/dL

Test Classification and CPT Coding

 

Test Classification:This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer’s instructions.
CPT Code:

 

82951-3 specimens
82952-Each additional specimen