Background: Little is known about the contribution of bile and acid reflux to night-time symptoms generation in patients who failed PPI treatment.
Aim: To compare the degree of night-time oesophageal acid and bile [by the surrogate duodenogastroesophageal reflux (DGER)] exposure between gastro-oesophageal reflux disease (GERD) patients who failed and those who fully responded to PPI once a day while on treatment.
Methods: Gastro-oesophageal reflux disease patients were assigned to the PPI failure group if they continued to report symptoms ≥3/week and to the PPI success group if they were asymptomatic for the last 3 months while on PPI once a day. All patients underwent upper endoscopy and subsequently simultaneous 24-h oesophageal Bilitec and pH testing while on PPI treatment.
Results: Twenty-three patients were enrolled into the PPI failure group and 24 patients into the PPI success group. The percentage of night-time pH<4 and the number of night-time acid reflux episodes were significantly higher in the PPI failure group as compared with the PPI success group. All night-time DGER parameters were similar between the PPI failure and PPI success groups.
Conclusions: Night-time oesophageal acid exposure is significantly higher in the PPI failure group vs. PPI success group. The degree of night-time bile reflux is similar in the two groups of patients with GERD.
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