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Comparative study of multiple channel intraluminal pH-impedance reflux monitoring and single pH monitoring for gastroesophageal reflux disease |
HU Zhiwei, XU Hui, WANG Zhonggao, WU Jimin, ZHAN Ying, XIN Ronghua, LIANG Yan, ZHANG Yu, ZHAN Xiulan, and MAO Jianxin |
Gastroesophageal Reflux Disease Department, Rocket Force Special Medical Center of PLA, Beijing 100088, China |
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Abstract Objective To explore the advantages of multiple channel intraluminal pH-impedance reflux monitoring (MII-pH) over single pH monitoring for the diagnosis of gastroesophageal reflux disease (GERD), and the characteristics of reflux episodes in patients with gastroesophageal reflux disease. Methods The data of adult GERD patients under MII-pH monitoring for the first time in our center between June 2015 and June 2017 was included. The positive rate of the main indicators of the pH channel and impedance channel of MII-pH monitoring, and the statistical relationships between the reflux indicators were analyzed. Results A total of 1780 patients with GERD were included, 889 of whom were males and 891 females, (51.6±12.9) years old. There were 1026, 1045, 462, 258, 448, 370, and 540 cases of acid reflux, heart burning, belching, chest pain, cough, asthma, and globus sensation symptom, respectively. The positive rate of the pH channel was 26.3%, of which the positive rate of DeMeester score was 25.4%, and that of acid exposure time (AET) was 25.4%. The positive rate of the impedance channel was 69%, where the positive rate of total reflux volume was 21.5%, the numbers of liquid acid reflux episodes and non acid reflux episodes were statistically different (P<0.001), and there was statistically significant difference between the number of liquid acid reflux episodes and that of gas reflux episodes (P<0.001). The positive rate of bolus exposure time (BET) was 40.3%, and the positive rate of symptom reflux association was 53%. The total positive rate of MII-pH monitoring was 71.3%. There was statistically significant difference (P<0.001) and a statistically significant correlation (r=0.904>0.9,P<0.001) between the number of acid reflux episodes of the impedance channel and that of the pH channel. The difference in McNemar chi square test of the positive rate of total reflux volume and symptom reflux association was statistically significant (P<0.001, Kappa=0.15), so was the difference in McNemar chi square test of the positive rate of pH channel and symptom reflux association (P<0.001, Kappa=0.120). Conclusions MII-pH monitoring is highly consistent and more sensitive for detecting acid reflux episodes compared with single pH monitoring. Non-acid reflux and gas reflux episodes detected by the impedance channel of MII-pH monitoring can significantly improve the detection rate of GERD. Analysis of symptom reflux association can improve the detection rate of GERD and even reflux hypersensitivity (esophagus and airway).
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Received: 20 August 2018
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