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Pathophysiology of Vomiting

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Vomiting is a complex physiological response to expel harmful or irritating substances from the body. It's a defensive mechanism triggered by stimuli like poisons, microbial toxins, cytotoxic drugs, and mechanical abdominal distension. The process is centrally coordinated by the vomiting (or emetic) center located in the medulla of the brainstem. This area, rich in muscarinic M1, histamine H1, neurokinin 1 (NK1), and serotonin 5-HT3 receptors, coordinates the act of vomiting through...
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Gastrointestinal or GI motility disorders are characterized by irregular gastrointestinal tract movements, disrupting food transit from the mouth to the anus. They are caused by damage or dysfunction in gut muscles or nerves. These disorders can cause symptoms such as severe constipation, diarrhea, abdominal pain, and swallowing difficulties. Disorders can affect any segment of the GI tract and range widely in severity, from common conditions like GERD to life-threatening conditions like...
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Gastroesophageal reflux disease, or GERD, is a persistent medical condition that affects many individuals worldwide. Its clinical manifestations can vary greatly, making diagnosis and management challenging for healthcare professionals. The following is a comprehensive overview of the clinical manifestations, assessment, and management strategies for GERD.
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Understanding the physiological differences in the pediatric population is crucial for effective pharmacotherapy. Neonates, infants, and children exhibit significant variations in gastric pH, gastric emptying time, intestinal transit time, and biliary function. These variations profoundly affect oral drug absorption, necessitating a nuanced approach to pediatric dosing.Neonates present with a unique physiological profile, having a gastric pH greater than 4 and faster and more irregular gastric...
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Gastroesophageal Reflux Disease (GERD) involves the recurrent backflow of the stomach or duodenal contents into the esophagus, leading to troublesome symptoms and potential esophageal mucosal damage. Although GERD is often referred to as a disease, it is more accurately described as a syndrome, as it encompasses a range of symptoms and complications rather than a singular pathological entity, impacting a large number of individuals as the most prevalent upper gastrointestinal problem. Roughly...
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Related Experiment Video

Updated: Apr 7, 2026

Author Spotlight: Alleviating Nausea and Vomiting in Pregnancy with Safe and Effective Auricular Acupuncture
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[Children's gastroenteritis and vomitings].

Sylvie Lacroix, Fanny Henaff, Christèle Gras-Le Guen

    La Revue Du Praticien
    |July 14, 2015
    PubMed
    Summary

    Gastroenteritis requires prompt recognition of dehydration signs. Oral rehydration solution is the primary treatment, with careful consideration of differential diagnoses like hemolytic-uremic syndrome.

    Area of Science:

    • Gastroenterology
    • Public Health
    • Pediatrics

    Context:

    • Gastroenteritis represents a significant public health concern.
    • Healthcare providers must be adept at identifying dehydration.
    • Effective management hinges on timely intervention.

    Purpose:

    • To underscore the importance of recognizing dehydration in gastroenteritis.
    • To highlight oral rehydration solution as the cornerstone of treatment.
    • To emphasize critical differential diagnoses, including hemolytic-uremic syndrome.

    Summary:

    • Gastroenteritis necessitates immediate assessment for dehydration.
    • Oral rehydration therapy is the definitive treatment.
    • Hemolytic-uremic syndrome is a key differential diagnosis to exclude.

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    Impact:

    • Improved patient outcomes through timely and appropriate management of gastroenteritis.
    • Reduced morbidity and mortality associated with dehydration.
    • Enhanced clinical decision-making in differentiating gastroenteritis from other serious conditions.