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HelpTest Code LAB10190 Lactose Tolerance
Department
CHEMISTRY
Collection Requirements
8 hour fast is required.
Testing requires patient to remain at laboratory approximately 2 hours.
Prepare 50 gm lactose according to LACTOL package insert.
Draw fasting specimen.
Have patient drink 50 gm of prepared lactose (LACTOL). After patient has completely consumed the lactose load, draw specimens at 15 min, 30 min, 60 min, 90, min and 120 min after lactose dose is consumed.
Primary Collection Container
Green PST (Lithium Heparin)
Alternate Collection Container
Green Microtainer PST
Transport
Plasma refrigerated
Preferred Transport Temperature
Refrigerated
Processing
Centrifuge and separate from cells within 2 hours.
Stability
Refrigerated: 72 hours
Minimum Testing Volume
0.5 mL
Reference Range
25 mg rise in glucose after injestion of Lactol.
Methodology
Hexokinase (HK) Roche c503
Performed
Monday – Friday
7:00 am – 3:30 pm
Reported
As completed
CPT Codes
82951; 82952×2
Unacceptable Conditions
Non-fasting patient.
Patient vomiting immediately after injestion of Lactol.