An evaluation of the antireflux properties of sodium alginate by means of combined multichannel intraluminal impedance and pH-metry.
Authors
Zentilin P, Dulbecco P, Savarino E, Parodi A, Iiritano E, Bilardi C, Reglioni S, Vigneri S, Savarino V.
Source
Aliment Pharmacol Ther. 2005 Jan 1;21(1):29-34.
Abstract
Background: Alginate-based preparations act as mechanical antireflux barrier, which can reduce both acid and non-acid reflux events and limit the proximal migration of oesophageal refluxate. AIM: To evaluate all the above features with a novel technique, multichannel electrical impedance and pH-metry.
Methods: Ten reflux patients underwent stationary impedancemetry and pH-metry after eating a refluxogenic meal. They were studied 1 h in basal conditions and 1 h after taking 10 mL of Gaviscon Advance. In both sessions, measurements were obtained in right lateral and supine decubitus.
Results: Alginate preparation was able to decrease significantly (P < 0.05) the number of acid reflux events and the percentage time pH < 4.0 compared with baseline. There was no effect of the drug on non-acid refluxes. Gaviscon Advance was also significantly effective (P < 0.05) in reducing the height of proximal migration of reflux events compared with baseline in both decubitus positions.
Conclusions: Our findings explain how Gaviscon Advance controls acid reflux episodes, limits the proximal migration of refluxed material and thereby decreases symptoms in clinical practice.
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