What is a barostat used for?
The barostat is a recently developed device used to study the physiology and pathophysiology of the motor and sensory functions of the gastrointestinal tract. It can monitor volume changes while maintaining a set constant pressure and deliver controlled distensions of gastrointestinal organs.
What is gastric barostat?
The gastric barostat consists of a computer-driven air pump connected to an oversized balloon, which can be positioned in the proximal or distal stomach. The barostat maintains a fixed pressure level within the stomach by adapting the intraballoon volume.
Where is the barostat located?
A rectal barostat catheter with a polyethylene bag attached will be inserted into the rectum so that the middle of the bag is located approximately 10 cm from the anal verge, and the barostat catheter will be taped to the buttocks.
What is gastric compliance?
Gastric compliance was calculated as the slope of the best-fit straight line of each subject’s gastric volume vs. gastric pressure. There was a significant postmeal increase in gastric compliance in both groups of subjects but there was no difference in compliance between patients with BN and controls.
What is gastric tone?
Gastric Tone Determines the Sensitivity of the Stomach to Distention. Page 1. GASTROENTEROLOGY 1995;108:330-336. Gastric Tone Determines the Sensitivity of the Stomach to. Distention.
What is gastric reservoir?
The gastric reservoir consists of the fundus and corpus. The gastric pump is represented by the area at which peristaltic waves occur: it includes the distal part of the corpus and the antrum.
What does progressive gastric emptying mean?
During ingestion of food, the stomach relaxes to accommodate the meal and, subsequently, a progressive gastric contraction parallels gastric emptying. Intestinal nutrients trigger feedback relaxatory mechanisms that regulate gastric tone and, hence, the nutrient load delivered into the small intestine.
Why is gastric accommodation important?
Gastric accommodation describes the reduction in gastric tone and increase in compliance that follows ingestion of a meal. These responses provide an appropriate gastric reservoir for food and enable volume to increase without a rise in gastric pressure.
