Lactulose Tolerance Test



Lactulose intolerance (hydrogen breath) test

This test measures the amount of hydrogen in the breath to detect bacterial overgrowth in the intestine (SIBO)

The rationale for performing this test is, that since lactulose is a non absorbable sugar, after it is ingested, if there is overgrowth of bacteria, excessive amount of Hydrogen gas is produced and is exhaled in the breath and detected by the meter. 

The resulting discomfort is exhibited by cramps, flatulence, and poor nutrition.

If a patient produces Hydrogen gas the MicroH2 can measure the quantity produced accurately in PPM(parts per million).

Instructions before the test

1.Fast overnight

2.No smoking on the day of the test

3.No vigorous exercise before or during test

4.Do not eat beans, bran, or high fiber cereals the day before the test

5.Do not take any antibiotics for two weeks before the test

Procedure of the test

You will be asked to blow through a small mouth piece which is connected to a small detecting device called MicroH2 meter. You will be then asked to ingest the required material and then again asked to blow in to the device a few times. The total procedure can be up to 2 ½ to 3 hrs based on the reading.