Fig. 3

Simultaneous 24-h pH and bilirubin monitoring. In the narrow lesion, the proportion of time at pH < 4 was 3.0 %. With a drip of omeprazole of 20 mg, pH in the stomach rapidly increased to approximately 6 and but then rapidly decreased to less than 4. (Omeprazole treatment was started 3 days before the test.) The fraction of time with pH < 4 was 89.3 %. Just beyond the narrow lesion, the proportion of time at bilirubin absorbance >0.14 was 20.4 %