Endoscopy, barium esophagram, and esophageal manometry are 3 well established and often complementary tests in establishing the diagnosis of achalasia.
This test involves passing a small lighted flexible tube through the mouth into the esophagus
You will be asked to swallow a liquid barium mixture. The radiologist uses a fluoroscope to watch the barium as it travels down your esophagus and into the stomach.
You may be asked to move into various positions on the X-ray table while the radiologist watches the GI tract. Permanent pictures (X-ray films) will be made as needed.
Esophageal Manometry or Esophageal pH
This test involves passing a small flexible tube through the nose into the esophagus and stomach in order to measure pressures and function of the esophagus.