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- W2122090955 abstract "Abstract Multichannel intraluminal impedance (MII) is being used increasingly to assess oesophageal bolus clearance. However, there is no good standardization of the impedance parameters that define ‘effective bolus clearance’. The aim of this study was to define these important impedance parameters and to determine their normal values. Concurrent perfusion manometry and MII were performed in 42 healthy volunteers. Ten, 5‐mL liquid (saline) boluses and then, 10 × 5‐mL low impedance viscous boluses were tested in each subject in the right‐lateral position. Normal values for bolus presence time (BPT) at each site and total bolus transit time (TBTT) were determined from either ‘normal’ peristaltic responses (amplitude ≥30 mmHg in distal oesophagus) or ‘super‐normal’ peristaltic responses (amplitudes ≥50 mmHg at all sites). The relationship between BPT and TBTT within a response and per‐individual performance was determined. A total of 840 swallows of liquids and viscous responses were analysed. BPT and TBTT of viscous swallows were longer than those for liquids. Non‐peristaltic responses were significantly more likely not to clear a viscous than a liquid bolus. Within a response, the number of sites with prolonged BPT strongly predicted the incidence of prolonged TBTT. Using impedance criteria, normal oesophageal bolus clearance is defined when an individual completely clears at least 70% of liquid responses and at least 60% of viscous responses. This study provides normal values for impedance measurement of bolus clearance when combined with perfusion manometry. These values will allow standardization of impedance application in oesophageal function testing, in both research and clinical setting." @default.
- W2122090955 created "2016-06-24" @default.
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- W2122090955 date "2005-04-21" @default.
- W2122090955 modified "2023-10-11" @default.
- W2122090955 title "Assessment of oesophageal motor function using combined perfusion manometry and multi-channel intra-luminal impedance measurement in normal subjects." @default.
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- W2122090955 doi "https://doi.org/10.1111/j.1365-2982.2005.00646.x" @default.
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