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. 2014 Oct;2(5):355–366. doi: 10.1177/2050640614549096

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Figure 3. — Pressure flow analysis using automated impedance manometric (AIMplot) software. (a) Pressure at nadir impedance (PNadImp) defines intrabolus distension pressures during bolus transport. (b) Intrabolus pressure slope (IBPslope) can serve as a marker for the degree of pressurisation need to propel the bolus onward. (c) The time from nadir impedance to peak pressure (TNadImp to PeakP) is a marker of how far ahead of the peristaltic wave the bolus moving. (d) Impedance ratio is a marker of clearance.