Abstract：Objective This study aimed to evaluate the diagnostic value of a 24-hour esophageal combined multichannel intraluminal impedance pH (24 h our MⅡ-pH) monitoring in children with gastroesophageal reflux (GER) disease and recurrent pneumonia. Methods A total of 17 cases with a suspected diagnosis of GER disease children with unexplained recurrent pneumonia underwent a 24-hour MⅡ-pH monitoring to analysis of the nature and characteristics of reflux. Results In the 17 cases of GER disease with recurrent pneumonia, 11 (65%) were confirmed positively by a 24-hours of MⅡ-pH monitoring. A total of 853 reflux cycle were detected, of which 65.3% were acid refluxes predominantly occurring within 2 hours after meal, and 71.6% were mixed refluxes. Refluxes occurred most frequently in the supine position, followed by the lateral position and the prone position. Distal reflux was the predominant form of reflux. According to the Biox-Ochoa classification, 73% of cases (8/11) were severe GER. Conclusions MII-pH monitoring may effectively characterize refluxate properties and thereby increase the detection rate of GER disease.
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