Glucose hydrogen breath tests can also be used to detect SBBO. Glucose is completely absorbed before reaching the colon even in patients with previous gastric surgery, who have faster than normal transit. Patients receive a solution containing 50-80 g of glucose dissolved in 250 ml water after fasting for 12 hours. Breath hydrogen concentrations are analyzed with an H2 monitor after direct expiration through a Y-piece that prevents air from mixing with the exhaled hydrogen (84). Hydrogen concentration is determined every 10-15 minutes for two hours. Results of the hydrogen breath test are considered
Lactulose breath test
200 180 160 140 1= 120
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