Impact of bolus volume on small intestinal intra-luminal impedance in healthy subjects

Figure 1 Outline of recording assembly, consisting of combined manometry and impedance catheters and feeding tube, positioned within the proximal small intestine.

Figure 2 An example of combined manometry-impedance recording, demonstrating the patterns and the definition of total bolus clearance time (TBCT) for minor and major flow events.

Figure 3 Relationship between bolus volume and characteristics of the associated impedance changes. ^aP < 0.05 vs 2 mL boluses.

Figure 4 Relationship between bolus volume and the magnitude of impedance drop (A), the proportion of boluses followed by a propagated pressure wave (B) and the occurrence of major flow events (C). ^aP < 0.05 vs 2 mL boluses.