(picnic table image by Horticulture from Fotolia.com) Standard-size A-frames use five to seven lengths of timber for the table top and two to three lengths for the seats. A standard table top height is about 30 inches while the height of the seat top should be about 16-18 inches.
HealingWell.com Forum > Diseases & Conditions > GERD - Heartburn > Prokinetic agents - drugs that tighten the lower esophageal sphincter. These drugs work by tightening the lower esophageal sphincter, which helps prevent acid from washing back up into the esophagus. They also slightly increase the contractions of the esophagus and the stomach to help empty the stomach faster. Prokinetic agents include metoclopramide (also known as Reglan), bethanechol (Duvoid) and tegaserod (Zelnorm).
1 Chronic irritation from reflux is the usual cause of esophageal strictures. 2  Achalasia: A rare disease in which the lower esophageal sphincter does not relax properly. 3  Difficulty swallowing and regurgitation of food are symptoms. 4  Esophageal cancer: Although serious, cancer of the esophagus is uncommon.hey keep food and secretions from going down the windpipe. The lower esophageal sphincter (LES) is a bundle of muscles at the low end of the esophagus, where it meets the stomach. When the LES is closed, it prevents acid and stomach contents from traveling backwards from the stomach.