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  • Title: 24-hour pH-impedance monitoring on therapy to select patients with refractory reflux symptoms for antireflux surgery. A single center retrospective study.
    Author: Desjardin M, Luc G, Collet D, Zerbib F.
    Journal: Neurogastroenterol Motil; 2016 Jan; 28(1):146-52. PubMed ID: 26526815.
    Abstract:
    BACKGROUND: Treatment of gastro-esophageal reflux refractory symptoms is challenging. This monocenter retrospective study assessed the value of preoperative pH-impedance monitoring 'on' therapy to predict functional outcome after laparoscopic fundoplication in patients with refractory reflux symptoms. METHODS: Patients with a preoperative pH-impedance monitoring 'on' proton pump inhibitors (PPIs) twice daily were assessed at least 6 months after a laparoscopic fundoplication for refractory reflux symptoms. Failure of fundoplication was defined by a Visick score > 2. Postoperative symptoms were assessed by the reflux disease questionnaire (RDQ). The pH-impedance parameters analyzed were the number of reflux events (total, acid, non-acid), esophageal acid exposure time, esophageal bolus exposure time, and symptom-reflux association defined by symptom index (SI) >50% and symptom association probability (SAP) >95%. KEY RESULTS: Thirty-three patients (18 female patients, median age 46 years) were assessed after a mean follow-up of 41.3 (range 7-102.2) months. Seven (21.2%) patients were considered as failures. Compared to patients with favorable outcome, these patients were more often 'on' PPI therapy (86% vs 23%, p < 0.05) and had higher RDQ scores in each domain: heartburn (p < 0.05), regurgitation (p < 0.05) and dyspepsia (p < 0.05). A positive SAP was the only pH-impedance parameter statistically associated with successful postoperative outcome (p = 0.004). CONCLUSIONS & INFERENCES: On therapy, a preoperative positive symptom association probability is the only pH-impedance parameter associated with favorable outcome after laparoscopic fundoplication for refractory reflux symptoms. These results should be confirmed by prospective studies.
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