Abstract

APONTE, Raúl et al. Promoting factors of gastro esophageal reflux in patients with hiatal hernia. Gen [online]. 2016, vol.70, n.4, pp.119-124. ISSN 2477-975X.

Introduction: The hypotensive lower esophageal sphincter (LES), hiatal hernia (HH) and the increase in the esophagogastric junction distensibility (EGJD) play a role in gastro esophageal refux disease (GERD). The episodes of reflux are associated with low pressure on the LES sphincter. Studies have shown that the EGJD is high in patients with HH and GERD and the more severe forms of GERD are invariably associated with the HH. Objectives: To determine if there is a sinergistc relationship between the HH, the LES pressure and the EGJD with the GERD through measurement by planimetric impedance (PI).Patients and methods: A prospective, study was conducted on patients with GERD and HH. The diagnosis was confirmed by symptoms, endoscopy, high-resolution manometry (HRM), pH metry and multichannel impedance of 24 hours. The length of the HH, pressure from the LES (LESP) and esophageal body peristalsis were measured. All patients underwent anti reflux surgery and HH correction surgery. Pressure and EGJD measurements were valued by (PI), using the Endoflip® system at the beginning and at the end of the surgery. Distensibility index (DI) is the result of the relationship between the EGJD/LESP in 30 seconds. Results: 68 patients: 45 women, (42,34 ± 10,79 years) were evaluated. The variables with association with the initial DI are: the length of HH (cms) (r=0,440; p<0,001), initial EGJD (mm2/mmHg) (r=0,512; p<0,001), the initial pressure (mmHg) (r=−0,320, p=0,006) and LESP measured by HRM (mmHg) (r=−0,465; p<0,001). Between the initial pressure measured by PI and the initial DI there is a nonlinear relationship or reverse. Due to this, regression analyzes were conducted considering the inverse of the initial pressure, and observing that the model is statistically significant and that it does not presents any collinearity. Those variables that do not provide information to the model were discarded, being then formed by three magnitudes: length of the HH, inverse of the initial pressure and initial distensibility. The data was adjusted later with a predictive model based on multiple regression analysis. Conclusion: The presence of the variables length of the HH and initial distensibility with low values for the variance inflation factor (VIF) indicate that they are providing information to the model and that it is independent of that provided by the inverse of the initial pressure. Accordingly, the presence of HH, high EGJD values and low pressure on the LES by themselves contribute to the development and progression of GERD since they are not influenced among them.

Keywords : Gastro esophageal reflux disease; hiatal hernia; LES pressure; esophagogastric junction distensibility.

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