Impact of Acid Suppression on Upper Gastrointestinal pH and Motility.
Summary of "Impact of Acid Suppression on Upper Gastrointestinal pH and Motility."
Proton pump inhibitors (PPIs), widely prescribed to patients with upper gastrointestinal symptoms, alter intragastric pH, and may affect upper gastrointestinal transit and motility parameters in addition to affecting the ability to determine Wireless Motility Capsule (WMC) gastric emptying time.
To assess PPI effect on motility parameters of the upper gastrointestinal tract and to determine if PPIs confound ability of WMC to measure gastric emptying time.
Twenty healthy subjects were treated with esomeprazole 40 mg bid for 1 week. Another 50 healthy subjects underwent evaluation in absence of PPIs. All subjects underwent WMC test after meal ingestion. After a rapid, sustained luminal pH rise ≥ 0.5 pH units, marking potential gastric emptying time of WMC, an abdominal X-ray (KUB) was taken for gastric emptying time confirmation. Mean pH, pressure and transit time were compared between PPI-treated and untreated groups.
There was no difference in gastric emptying time, small bowel transit time (SBTT), or pressure profiles between the groups. The pH in all cases rose ≥ 0.5 pH units. Distal small bowel pH was significantly lower in subjects on PPIs. Gastric emptying time was identified in all subjects treated with PPIs. Pressure and slope criteria were developed to confirm the time of emptying.
PPI therapy does not have a significant impact on upper gastrointestinal transit and motility but it does decrease distal small bowel pH. The medication reduced the magnitude of pH change at gastric emptying time but using additional criteria based on slope and contraction frequency, WMC was able to measure gastric emptying time in all patients treated with PPIs.
Massachusetts General Hospital, 55 Fruit St. GRJ 274, Boston, MA, 02114, USA, email@example.com.
This article was published in the following journal.
Name: Digestive diseases and sciences
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/21086166
- DOI: http://dx.doi.org/10.1007/s10620-010-1479-8
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Medical and Biotech [MESH] Definitions
Drugs used for their effects on the gastrointestinal system, as to control gastric acidity, regulate gastrointestinal motility and water flow, and improve digestion.
The motor activity of the GASTROINTESTINAL TRACT.
A drug that exerts an inhibitory effect on gastric secretion and reduces gastrointestinal motility. It is used clinically in the drug therapy of gastrointestinal ulcers.
A biochemical messenger and regulator, synthesized from the essential amino acid L-TRYPTOPHAN. In humans it is found primarily in the central nervous system, gastrointestinal tract, and blood platelets. Serotonin mediates several important physiological functions including neurotransmission, gastrointestinal motility, hemostasis, and cardiovascular integrity. Multiple receptor families (RECEPTORS, SEROTONIN) explain the broad physiological actions and distribution of this biochemical mediator.
The segment of GASTROINTESTINAL TRACT that includes the ESOPHAGUS; the STOMACH; and the DUODENUM.