When assessing gastroesophageal reflux disease by manometry each of the following statements is correct except one. Identify the incorrect one

C. With established reflux disease the UES is hypertensive.

DISCUSSION: In reflux disease when LES pressure is below 10 mm. Hg, manometry is too imprecise to identify a potential for significant reflux. If the pressure is less than 6 mm. Hg, this shows a reasonable high specificity as compared with abnormal reflux on pH testing. When LES pressure is extremely low or nonexistent, this identifies a more severe degree of reflux and a poorer prognosis for long-term medical therapy. In the esophageal body, active reflux esophagitis causes altered function. Failed peristalsis increases, and the contractions become weaker. Patients with a columnar-lined esophagus have the worst functional abnormalities. Although distention or acid perfusion in the proximal esophagus can produce a significant increase in UES resting pressure, there is at present no solid evidence relating UES resting pressures to active reflux disease.