Journal
AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY
Volume 284, Issue 4, Pages G663-G669Publisher
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/ajpgi.00403.2002
Keywords
multichannel impedance measurement; antroduodenal motility; Doppler ultrasound
Categories
Ask authors/readers for more resources
Our aim was to explore the use of intraluminal impedance recording for assessment of interdigestive transpyloric fluid movements. Twenty healthy volunteers were studied with a catheter allowing the recording of five antropyloroduodenal impedance signals simultaneously with six pressure signals. Patterns induced by air were verified by standard ultrasound. Transpyloric Doppler ultrasound was used to validate impedance patterns associated with transpyloric fluid transports. Impedance changes caused by air (short-lived increases) occupied 14 +/- 12% of the time in the antrum and 0.8 +/- 0.5% in the duodenum (P < 0.005). All fluid transport events lasting >4 s were recorded by both Doppler and impedance techniques. Transpyloric fluid transport was observed in all three phases of the antral migrating motor complex. The total number of transport events was significantly higher (P < 0.05) in phase II (18 +/- 7) than in phases I (2.6 +/- 2) and III (6.1 +/- 3). Retrograde transport was observed mainly in antral phase I (54% of fluid movements, compared with 2.5% in phase II and 18.5% in phase III, P < 0.05). During phase II, 80 +/- 13% of the impedance changes were associated with manometric events and 72 +/- 9% of the antral contractions were associated with transpyloric fluid transport. Prolonged assessment of interdigestive transpyloric fluid transport events using intraluminal measurement of impedance is possible. Manometrically detectable contractions are the most frequent, but not the only, driving forces of these events.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available