Chapter 47: Respiratory System

The respiratory tract functions to facilitate gas exchange between the atmosphere and bloodstream through a coordinated system involving upper and lower airways, lung tissue including alveoli, pleural membranes, and respiratory muscles. Understanding ventilation-perfusion relationships is essential for recognizing how oxygenation failures occur in disease states. The chapter systematically covers diagnostic procedures used to assess respiratory function, including imaging studies, arterial blood gas analysis, endoscopic visualization, fluid sampling techniques, and pulmonary function measurements. Major respiratory conditions are presented with their characteristic assessment findings, underlying pathophysiology, and evidence-based nursing interventions. Obstructive diseases like chronic obstructive pulmonary disease and asthma require specific breathing retraining techniques and medication management strategies. Infectious processes including pneumonia and tuberculosis demand understanding of transmission routes and appropriate isolation measures. Life-threatening conditions such as pulmonary embolism, acute respiratory distress syndrome, and tension pneumothorax require rapid recognition and emergency interventions. The chapter addresses mechanical ventilation management including mode selection, alarm troubleshooting, airway suctioning, and patient positioning to optimize oxygenation. Non-invasive ventilatory support options like continuous positive airway pressure and bilevel positive airway pressure provide alternatives for patients with respiratory compromise. Therapeutic breathing exercises and incentive spirometry promote secretion clearance and lung expansion. Assessment skills encompassing respiratory rate, breath sound characteristics, oxygenation status, and work of breathing enable nurses to detect clinical deterioration early and implement appropriate interventions to support gas exchange and prevent complications.