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HelpLactose Tolerance 90 min
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-, and 90-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)
Infants: 300 mg/dL
Adults: 500 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