Use of Solid Boluses in High-resolution Manometry

We read with great interest the data presented by Zhang et al1 regarding changes in high-resolution manometry (HRM) values when the procedure was performed in the upright position using solid swallows. Dysphagia and other esophageal symptoms due to abnormal esophageal motility have been shown to be poorly diagnosed by clinical history or endoscopy.2,3 Assessment of esophageal manometry is advocated as the subsequent investigation. While HRM...