Abstract
To evaluate measurements of intragastric pH with the Bravo capsule system over a prolonged time. A Bravo capsule was placed inside the rat gastric body and pH was studied for periods up to five consecutive days. For comparison, a gastric fistula model was used. Effects of ghrelin and esomeprazole, with or without pentagastrin, on gastric pH were studied. In addition, effects of esomeprazole on plasma ghrelin, gastrin and somatostatin were analyzed. All rats recovered after surgery. The average 24-h pH during free feeding was 2.3 +/- 0.1 (n = 20) with a variation of 18% +/- 6% over 5 d. Ghrelin, 2400 pmol/kg, t.i.d. increased pH from 1.7 +/- 0.1 to 3.1 +/- 0.3 (P < 0.01) as recorded with the Bravo system. After esomeprazole (1 mg/kg, 3 mg/kg and 5 mg/kg) there was a dose-dependent pH increase of maximally 3.4 +/- 0.1, with day-to-day variation over the entire period of 8% +/- 3%. The fistula and pH studies generated similar results. Acid inhibition with esomeprazole increased plasma ghrelin from 10 +/- 2 pmol/L to 65 +/- 26 pmol/L (P < 0.001), and somatostatin from 10 +/- 2 pmol/L to 67 +/- 18 pmol/L (P < 0.001). pH measurements with the Bravo capsule are reliable, and comparable to those of the gastric fistula model. The Bravo system optimizes accurate intragastric pH monitoring over prolonged periods and allows both short- and long-term evaluation of effects of drugs and hormones.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
