Pressure Flow Analysis in the Assessment of Preswallow Pharyngeal Bolus Presence in Dysphagia

Figure 2

Pressure flow analysis metrics recorded in relation to bolus presence to the pyriform sinuses prior to swallow onset. Group 1: patients NEVER demonstrating bolus to the pyriform sinuses at the time of swallow onset. Group 2: patients demonstrating bolus to the pyriform sinuses AT LEAST ONCE at the time of swallow onset. Controls: in all cases bolus was in the mouth or at base of tongue at time of swallow onset. Data are median (IQR) for liquid swallows. values are from Mann-Whitney tests with Bonferroni correction for multiple comparisons, .