Chapter 14: Nutritional Support & Parenteral Therapy

Nutritional Support & Parenteral Therapy details how the body requires a steady supply of energy to regulate metabolic processes and maintain organ function, noting that critically ill patients often require significantly higher caloric intake than healthy individuals. The discussion is centered on two primary delivery routes: enteral nutrition, which utilizes a functional gastrointestinal tract via oral supplements or various feeding tubes, and parenteral nutrition, which bypasses the digestive system entirely to deliver high-caloric solutions through large central veins. Readers will gain insight into the specific anatomical placements for enteral access—such as nasogastric, gastrostomy, and jejunostomy routes—and the clinical protocols required to ensure safety, including verifying tube position, monitoring gastric residual volumes, and elevating the patient’s head to prevent life-threatening aspiration pneumonitis. The text also addresses the complexities of administering medications through feeding tubes, emphasizing the importance of identifying non-crushable drugs like timed-release or enteric-coated formulas. In the realm of parenteral support, the chapter outlines the composition of intravenous solutions, including dextrose, amino acids, and lipid emulsions, while highlighting the intensive monitoring needed to manage complications like air embolisms, sepsis, and glycemic fluctuations. By following established clinical guidelines from organizations like ASPEN and NICE, healthcare providers can utilize a multidisciplinary approach to manage fluid balance, electrolyte stability, and nutritional goals, ultimately improving wound healing and reducing hospital stays for vulnerable populations.