Upper esophageal sphincter abnormalities on high-resolution esophageal manometry and treatment response of type II achalasia

Figure 2 Differences in lower esophageal sphincter mean resting pressure, lower esophageal sphincter integrated relaxation pressure, upper esophageal sphincter mean resting pressure, and upper esophageal sphincter residual pressure between pretreatment and posttreatment stages. Level significance is indicated as follows: ^aP < 0.05. LES: Lower esophageal sphincter; UES: Upper esophageal sphincter; restP: Mean resting pressure; IRP: Integrated relaxation pressure; RP: Residual pressure.