Chapter 24: Gastrointestinal Function & Aging

Gastrointestinal Function & Aging highlights that while gastrointestinal complaints are frequent among older patients, they are rarely the primary cause of death; however, they significantly impact overall health and comfort. The text details physiological shifts across the entire tract, starting with the oral cavity, where tooth loss, periodontal disease, and decreased saliva production (xerostomia) can impair nutrition. It further explains how weakened esophageal muscles lead to swallowing difficulties (dysphagia) and acid reflux, while a decline in gastric secretions like hydrochloric acid and pepsin can result in malabsorption and conditions such as pernicious anemia. The discussion extends to the accessory organs, noting that while the liver’s size and blood flow decrease—slowing drug metabolism—its function often remains within normal limits unless disease is present. Common clinical issues are thoroughly explored, including the prevalence of diverticulosis, the increased risk of gallstones, and the complexities of managing chronic constipation and fecal incontinence in a population often affected by polypharmacy and mobility limitations. Additionally, the chapter covers major pathological conditions like peptic ulcer disease—frequently linked to H. pylori—various forms of hepatitis, pancreatitis, and intestinal obstructions such as paralytic ileus. Significant emphasis is placed on the early detection and prevention of gastrointestinal malignancies, including esophageal, gastric, and colorectal cancers, through adherence to American Cancer Society screening guidelines. For nursing professionals, the material outlines critical assessment strategies and interventions aimed at maintaining hydration, managing pain, and providing nutritional support to enhance the quality of life for older adults.