Assessment of Esophageal High-Resolution Impedance Manometry in Patients with Nonobstructive Dysphagia

Figure 2

HRIM manifestation of one achalasia patient before and after peroral endoscopic myotomy (POEM) operation and one hiatal hernia patient. (a) One patient with II type achalasia in our study showed bolus retention in the esophagus body. (b) Four months after peroral endoscopic myotomy operation, the patient showed obvious reduced bolus retention and even exhibited proximal esophageal contraction. (c) One patient of hiatal hernia showed a 3 cm separation between the LES and CD during the baseline recording. (d) Gastroesophageal reflux occurred after the end of each peristaltic wave until the following swallow.

(a) Achalasia

(b) Achalasia after POEM treatment

(c) Hiatal hernia

(d) Hiatal hernia