Читать книгу The Esophagus - Группа авторов - Страница 59

Hypercontractility (i.e. jackhammer esophagus) is found in approximately 4% of patients who undergo manometric evaluation, as estimated by recent retrospective reviews of both healthy volunteers and consecutive patients undergoing manometry [148, 149]. Some isolated episodes of hypercontractility can be seen in healthy controls; however, among controls, no distal contractile integral (which measures the vigor of peristalsis) values were > 8,000 mmHg/cm/s [149]. Therefore, HRM diagnostic criteria necessary for jackhammer esophagus are a distal contractile integral of > 8,000 mmHg/cm/s on ≥20% of swallows [124].