Table 1.
Published findings of changes in pressure-flow metrics in relation to bolus perception
| Change in pressure flow metric (distal oesophagus) as related to subjective bolus perception | |||||||
|---|---|---|---|---|---|---|---|
| Publication | Method used | Cohort type | Bolus type | PNadIMP | IBPslope | Time NadImp to Peak P | PFI |
| Myers et al.41 2012 | 8-Channel perfusion | GERD | Viscous | NS | Increased | Shorter | Increased |
| Chen et al.57 2013 | 5-Channel solid state | NOD | Viscous | NS | Increased | NS | Increased |
| Omari et al.59 2013 | 32- to 36-Channel solid state | Control | Solid | NS | Increased | NS | Increased |
| Rommel et al.60 2014 | 21-Channel perfusion | Control | Solid | NS | Increased | NS | NS |
PNadIMP: pressure at nadir impedance; IBPslope: intrabolus pressure slope; Time NadImp to Peak P: time from nadir impedance to peak pressure; PFI: pressure-flow index; GERD: gastroesophageal reflux disease; NOD: non-obstructive dysphagia; NS: not statistically significant. Data shown for GERD patients relate to postoperative global dysphagia symptoms measured pre-operatively. Other data relate to perception on a swallow-by-swallow analysis.