(GORD)

Review of Gastrointestinal System Anatomy and Physiology

  • Gastric Secretions: When stimulated by eating, the stomach secretes large volumes of gastric juices. These include:

    • Mucus

    • Acid

    • Enzymes

  • Cellular Functions:

    • Parietal Cells: These cells in the stomach are responsible for the secretion of Hydrochloric acid (HClHCl) and intrinsic factor.

    • G Cells, Chief Cells, and K Cells: These perform other digestive functions distinct from the secretion of HClHCl and intrinsic factor.

  • Stomach Anatomy:

    • The Pylorus is the specific part of the stomach that connects to the small intestine.

    • Other regions of the stomach include the Fundus, Body, and Cardia.

  • Abdominal Assessment Terminology:

    • Borborygmus: This refers to a rumbling or gurgling sound produced by the movement of fluids and gases within the intestines.

    • Contrast this with other findings such as a friction rub (caused by inflamed peritoneal surfaces), the absence of peristalsis (indicated by decreased bowel sounds), or a small twisted abdominal mass noticeable on palpation.

Effects of Ageing on Digestive Function

  • The ageing process significantly alters the gastrointestinal system through several mechanisms:

    • A decline in the number of taste buds.

    • A diminution of the sense of smell.

    • A decrease in salivary secretions.

    • A decrease in both oesophageal and gastric motility.

Pathophysiology of Gastro-oesophageal Reflux Disease (GORD)

  • Definition and Pathophysiology: GORD involves the reflux of gastric contents into the oesophagus, leading to symptoms and potential mucosal damage.

  • Course and Implications: The disease follows a specific course that warrants clinical intervention to prevent long-term cellular changes or respiratory complications.

  • Clinical Manifestations: typical features of GORD include:

    • Burn and Retrosternal Pain: Often referred to as heartburn, occurring typically after eating.

    • Dysphagia: Difficulty in swallowing.

    • Airway Irritation: Chronic cough and irritation of the respiratory tract.

    • Note: Lower abdominal pain occurring 2 hours after eating is NOT considered a typical clinical feature of GORD.

Complications and Respiratory Associations

  • Potential Complications: If left untreated, GORD can lead to severe damage to the oesophageal lining and other systemic issues.

  • Respiratory Impact: There is a direct link between GORD and respiratory conditions such as asthma. Refluxed gastric contents can be micro-aspirated into the lungs or trigger a vagal reflex that leads to bronchoconstriction, causing or exacerbating asthma symptoms.

Diagnostic Testing for GORD

  • Bernstein Test: A specialized diagnostic procedure used specifically to measure oesophageal acidity and reproduce the pain associated with GORD.

  • Barium Swallow Test: Another diagnostic imaging tool utilized to evaluate the structure and function of the oesophagus and detect reflux or hiatus hernia.

Pharmacology in GORD Treatment

  • Proton Pump Inhibitors (PPIs):

    • Examples: Omeprazole, Esomeprazole, and Pantoprazole.

    • Mechanism of Action: These medications work by irreversibly inhibiting the H+/K+H^+/K^+ ATPase enzyme system (the proton pump) in the parietal cells of the stomach, thereby significantly reducing gastric acid secretion.

  • H2-Receptor Antagonists:

    • Examples: Ranitidine and Cimetidine.

    • Mechanism of Action: These drugs block histamine from binding to the H2H_2 receptors on the parietal cells, which reduces the production of stomach acid.

Nursing Management and Lifestyle Modifications

  • Nursing Assessment: Utilizing comprehensive evidence-based frameworks to develop management plans for patients with GI alterations.

  • Mental Health Considerations: Nurses must acknowledge the impact on a person's mental health when their body is responding to chronic gastrointestinal conditions.

  • Lifestyle Interventions:

    • Managing GORD through dietary changes and behavioral modifications.

    • Nurses support patients in implementing these changes to alleviate symptoms and prevent further damage.

  • Fundamental Care: Addressing basic needs while acknowledging that requirements change across the lifespan.

Lifespan Considerations: GORD in Infants

  • Gastro-oesophageal Reflux (GOR) vs. Disease (GORD): In infants, it is vital to distinguish between normal physiological reflux (GOR) and the pathological state (GORD) that results in poor growth or respiratory issues.

  • Developmental Factors: Anatomical and physiological immaturities in the lower oesophageal sphincter contribute to reflux in the paediatric population.

Case Study: Jane Mayne

  • Structure: The management of Jane Mayne is approached using a Q&A format designed to prompt critical thinking.

  • Clinical Reasoning Cycle: The discussion follows the steps of the Clinical Reasoning Cycle, emphasizing the need for comprehensive patient assessment and evidence-based intervention strategies.