Table 1
Validation of oesophageal impedance for assessment of volume clearance
Time from swallow to: (n=35)
Videofluoroscopy (seconds)
Impedance (seconds)
Oesophageal filling
2.14 (0.18)
2.01 (0.11)
Oesophageal emptying
5.93 (0.50)
5.56 (0.32)
Interval filling—emptying (volume clearance time)
3.79 (0.39)
3.55 (0.33)