Acid reflux, also called gastro-esophageal reflux disease (GORD), is a condition where the stomach contents (food or liquid) rise up from the stomach into the esophagus, a tube that carries food from the mouth to the stomach.
Normally the stomach contents do not enter the esophagus due to constricted LES. But in patients with acid reflux stomach content travels back into the esophagus because of a weak or relaxed lower esophageal sphincter (LES). Lower esophageal sphincter is a ring of muscle fibers that surrounds the lower-most end of the esophagus where it joins the stomach. LES acts like a valve between the esophagus and stomach preventing food from moving backward into the esophagus
Heartburn is usually the main symptom; a burning-type pain in the lower part of the mid-chest, behind the breast bone. Other symptoms such as a bitter or sour taste in the mouth, trouble in swallowing, nausea, dry cough or wheezing, regurgitation of food (bringing food back up into the mouth), hoarseness or change in voice, and chest pain may be experienced.
The exact cause of what weakens or relaxes the LES in GORD is not known, however certain factors including obesity, smoking, pregnancy, and possibly alcohol may contribute to GERD. Common foods that can worsen reflux symptoms include spicy foods, onions, chocolates, caffeine containing drinks, mint flavorings, tomato based foods and citrus fruits. Certain medications can also worsen the reflux.
There are several tests that can be performed to diagnose acid reflux and they include:
- Endoscopy: This test allows the doctor to examine the inside of the patient’s esophagus, stomach, and portions of the intestine, with an instrument called an endoscope, a thin flexible lighted tube.
- Barium X-rays: These are diagnostic x-rays in which barium is used to diagnose abnormalities of the digestive tract. You are asked to drink a liquid that contains barium. The barium coats the walls of the esophagus and stomach and makes the abnormalities visible more clearly. Then X-rays are taken to see if there are strictures, ulcers, hiatal hernias, erosions or other abnormalities.
- Twenty four-hour pH monitoring: In this procedure, a tube will be inserted through the nose into the esophagus and positioned above the LES. The tip of the tube contains a sensor which can measure the pH of the acid content refluxed into esophagus. A recorder, strap-like device that can be worn on wrist, will be connected to record the pH of the acid content. The tube will be left in place for 24 hours. Patients can also go back home and perform their regular activities and can record the pH of the acid content when they experience the symptoms. On the next day the recorder will be connected to a computer and the data will be analyzed.
- pH Capsule: It is a new method of measuring acid exposure in the esophagus. A small wireless capsule which is introduced into the esophagus by a tube through the nose or mouth. The tube is removed after the capsule is attached to the lining of the esophagus. The pH sensor transmits signals to a computer which collects the data about the acid exposure over the usual 24 hours. The capsule falls off of the esophagus with time and is passed in the stool.
- Impedance study: This test is similar to pH test but requires two probes; one is placed in the stomach and the other just above the stomach. The dual sensor helps to detect both acidic and alkaline reflux.
General measures the patient can take to reduce reflux are:
- Avoid eating before going to bed as this may decrease the acid production
- Eat smaller and more frequent meals
- Lose weight if you are over weight
- Elevate the head of the bed
- Eliminate the foods that increases the reflux
- Avoid smoking and use of alcohol
- Check with the physician regarding side effects of prescription medications