The nurse is teaching an in-service program to a group of nurses on the topic of gastrointestinal disorders. The nurses in the group make the following statements. Which statement is most accurate related to the pathophysiology of gastroesophageal reflux?

Choice A reason: This describes conditions such as bowel obstruction or intussusception, not gastroesophageal reflux (GER). GER involves the backward flow of stomach contents into the esophagus due to lower esophageal sphincter dysfunction, not intestinal blockage. Choice B reason: This statement refers to pyloric stenosis, where the hypertrophied pyloric muscle obstructs gastric emptying. It is unrelated to GER, which involves the esophagus and not the pylorus. Choice C reason: Paroxysmal abdominal pain is characteristic of conditions like irritable bowel syndrome or intussusception. GER typically presents with regurgitation, irritability, and feeding difficulties in infants, and heartburn in older children or adults. Choice D reason: GER is caused by relaxation or incompetence of the lower esophageal sphincter (LES), allowing gastric contents to reflux into the esophagus. This leads to symptoms such as regurgitation, heartburn, and esophagitis. This statement accurately reflects the pathophysiology of GER.