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Gastric Motility01:16

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Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
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Esophageal Achalasia01:27

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Esophageal achalasia is a chronic neurogenic disorder characterized by impaired relaxation of the lower esophageal sphincter (LES) and absent or ineffective peristalsis in the distal esophagus. This leads to a functional obstruction without a physical blockage, despite significant disruption of esophageal motility.EtiologyAchalasia is caused by degeneration of the myenteric (Auerbach's) plexus, specifically the loss of inhibitory ganglion cells that produce vasoactive intestinal peptide (VIP)...
Gastroesophageal Reflux Disease01:25

Gastroesophageal Reflux Disease

Gastroesophageal reflux disease (GERD) is the backward flow of stomach contents (acid, pepsin, or bile) into the esophagus, causing mucosal inflammation known as esophagitis. It results from failure of antireflux mechanisms, mainly the lower esophageal sphincter (LES), influenced by mechanical and physiological factors.Etiology and Risk FactorsGERD develops when LES function is weakened or when intra-abdominal pressure increases. Risk factors include aging, obesity, and sliding hiatal hernia,...

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The Dyspepsia Educational Tool As a Novel Aid in Dyspepsia Management
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Pentagastrin in diffuse oesophageal spasm

R M Wexler, M D Kaye

    Gut
    |March 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Pentagastrin did not worsen symptoms in patients with idiopathic diffuse esophageal spasm (IDOS). Physiological gastrin likely does not cause IDOS symptoms, and pentagastrin is unlikely to be a useful diagnostic tool.

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    Area of Science:

    • Gastroenterology
    • Esophageal Motility Disorders

    Background:

    • Idiopathic diffuse esophageal spasm (IDOS) is a motility disorder characterized by abnormal esophageal contractions.
    • The role of endogenous gastrin in the pathophysiology of IDOS remains unclear.

    Purpose of the Study:

    • To investigate the effects of exogenous pentagastrin on esophageal motility in patients with IDOS.
    • To determine if pentagastrin administration can provoke symptoms or alter esophageal contractility in IDOS patients.

    Main Methods:

    • Six subjects with IDOS underwent continuous intravenous infusions of pentagastrin at varying doses (1, 5, and 10 µg/kg/h) and a saline control.
    • Esophageal manometry was performed to assess contraction amplitude, duration, and propagation velocity during 'wet' and 'dry' swallows.

    Main Results:

    • No pain was reported during pentagastrin infusion.
    • Dysphagia and repetitive contractions occurred in two subjects during saline and the lowest pentagastrin dose.
    • Pentagastrin increased contraction amplitude only with dry swallows at the highest dose (10 µg/kg/h).
    • Contraction duration increased with both wet and dry swallows at 1 µg/kg/h, and with dry swallows at 10 µg/kg/h.
    • Propagation velocity remained unchanged.

    Conclusions:

    • Physiologically released gastrin during eating is unlikely to contribute to symptom production in IDOS.
    • Pentagastrin, at the tested doses, is not a reliable diagnostic tool for IDOS.