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The authors proposed the following classification of the swallowing pressure curve depending on the site of lesion on the basis of swallowing pressure recordings of 47 patients with dysphagia.Type I: Normal type. It has three peaks of the swallowing pressure which correspond to the velopharynx, hypopharynx and cervical esophagus respectively.Type II: Abnormal elevation of the pressure. This type consists of the following two subtypes.Type IIa: indicating the upper esophageal sphincter spasmus. The pressure at the entrance of the esophagus elevates over the upper normal limit of that region.Type IIb: indicating stenosis at the entrance of the esophagus. The peak of the pressure at the hypopharynx elevates over the upper normal limit of that region.Type III: Abnormal depression of the pressure. This type consists of the following two sub-types.Type IIIa: indicating depression of the pressure in the pharynx. The peak of the pressure at the hypopharynx reduces or disappears.Type IIIb: indicating soft palatal paralysis. The peak of the pressure at the level of the velopharynx reduces or disappears.The above classification might be helpful for the choice of treatments in various types of dysphagia.

A new classification of swallowing pressure curve in pharyngeal dysphagia.