High-resolution anorectal manometry HR-ARM and high-definition anorectal manometry HD-ARM catheters have closely spaced water-perfused or solid state circumferentially-oriented pressure sensors that provide much better spatiotemporal pressurization than non-high resolution catheters. Further studies are needed to refine our understanding of normal values and to rigorously evaluate the incremental clinical utility of HR-ARM or HD-ARM compared to non-high resolution manometry. Anorectal manometry ARM and rectal balloon expulsion tests are widely used for diagnosing defecatory disorders in constipated patients. The pressure-sensing element varies among systems. Unisensor catheters UniTip, Attikon, Switzerland are comprised of a unidirectional pressure sensor embedded within a soft membrane containing silicone gel.
How to Perform and Interpret a High-resolution Anorectal Manometry Test
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