24-hour pH monitoring of the esophagus

The 24h pH monitoring of the esophagus is to use the pH gradient method to place the lower electrode of the pH monitor at the upper edge of the lower sphincter of the esophagus 5cm, and the upper electrode of the lead at the upper edge of the lower sphincter 20cm. Changes in the pH of the esophagus to understand the pH of the esophagus. The general monitoring time is more than 18h. For patients suspected of reflux esophagitis.

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