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It is very common during pregnancy for reflux to be a problem. The fetus increases the abdominal pressure and the hormones of pregnancy may decrease the lower esophageal sphincter pressure. Also If the stomach doesn’t empty because of a motility problem or a blockage then there is a greater risk for acid to reflux into the esophagus. |
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Normally the esophagus is located above the diaphragm and the stomach is below the diaphragm. The lower esophageal sphincter lies at the level of the diaphragm in between the esophagus and stomach. The diaphragm is a muscle that separates the chest from the abdomen. A hiatus hernia occurs when a portion of the stomach adjacent to the esophagus pushes up thru the diaphragm and rests above the diaphragm in the chest region. A hiatus hernia is a common occurrence and often causes no problems. Many individuals have reflux and do not have a hiatus hernia. In some individuals it may contribute to reflux. The diaphragm squeezes on the sphincter when it is normally located at the level of the diaphragm and helps to increase the pressure in this region. When the sphincter is situated above the diaphragm in the setting of a hiatus hernia the diaphragm can no longer assist the effect of the lower esophageal sphincter pressure. Also sometimes acid can be trapped in the hiatus hernia and be a reservoir for acid to more readily reflux into the esophagus. |
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Important: This information should not be used as a substitute for the medical care and advice of your physician. 
