Esophageal Manometry: Fundamentals and Diagnostic Insights

PrinciPleIn the water-perfusion system, the catheter consists of multiple fine plastic tubes with side ports positioned at specific intervals along its length.Water perfusion takes place continuously through these tubes at a fixed rate to maintain a constant internal pressure.During esophageal peristalsis, compression of a side port interrupts water flow, causing a measurable pressure change within that tube, which is displayed on the color plot.In contrast, solid-state systems incorporate pressure sensors positioned at regular intervals along a flexible catheter.Their key advantage is the ability to detect rapid pressure changes with high temporal resolution.The pressure data from both systems are interpolated and displayed as a twodimensional topographic contour plot, where concentric bands represent color-coded pressure gradients according to a defined scale.