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Test Code LACTOL Lactose Tolerance Test, Plasma

Performing Laboratory

Northwell Health Laboratories

Methodology

Colorimetric

Reference Values

See report.

Test Classification and CPT Coding

82952 x 5

Day(s) and Time(s) Performed

Monday through Sunday

Specimen Required

Container/Tube: Grey-top (potassium oxalate/sodium fluoride) tube(s)

Specimen Volume: 1 mL of plasma

Collection Instructions: 

1. Patient should be instructed to have nothing to eat or drink for at least 8 hours before test (except for sips of water).

2. Patient should be instructed to refrain from smoking and drinking coffee just before and during test.

3. Patient is given a lactose dose as follows:

A. 1 g/kg of body weight of pediatrics

B. 50 g for adults

4. Draw fasting blood specimen, and 30 minutes, 60 minutes, 90 minutes,120 minutes and 180 minutes post lactose ingestion.

Note: Label specimens appropriately (as fasting, 30, 60, 90,120  or 180 minutes) and Glucose levels will be performed for the lactose tolerance.