To explore the application value of abdominal pressure technique in high-resolution esophageal manometry in improving the positive detection rate of sliding hiatal hernia.

200 cases with high-resolution esophageal manometry were collected and divided into control group and observation group with 100 cases in each group (all the cases in the group were cases with esophageal hiatal hernia or cardia relaxation by gastroscopy, or those who were suspected of gastroesophageal reflux disease but were negative by gastroscopy, and were finally treated by gastroscopy or laparoscopic anti-reflux surgery after exclusion of contraindications and discontinuation of propulsive drugs for one week). In the observation group, in the routine operation of high-resolution esophageal manometry, the cases without hernia signs were further subjected to abdominal pressure method to simulate the observation of the morphology of the junction of esophagus and stomach by increasing abdominal pressure. The control group was treated with routine operation techniques. Finally, according to the diagnosis of gastroscopy and laparoscopy, the difference and detection efficiency of the two methods in the positive detection rate of sliding hiatal hernia were compared.

Among the 200 cases, 81 cases (81%) were detected in the observation group by abdominal pressure, and 56 cases (56%) were detected in the control group by routine operation, with significant difference (P＜0.05).

Using abdominal pressure technique to simulate the increase of abdominal pressure in high-resolution esophageal manometry can significantly improve the detection rate of sliding hiatal hernia.