A rehabilitation and functional care concept defining interventions used to improve mobility, function, and safe participation in daily activities. It governs assessment, goal setting, therapeutic interventions, and safety measures implemented by nursing and allied health teams. It does not guarantee functional gains without patient engagement and appropriate progression based on tolerance and safety. It materially affects independence and recovery by reducing deconditioning and supporting safe discharge readiness. The concept is generally stable, though therapy techniques and clinical pathways evolve over time.

Principle

Optimize ventilation, oxygenation, and ventilation–perfusion relationships while minimizing patient work of breathing and therapy-related harm; apply evidence-based device settings, infection control, and individualized patient assessment.

Demonstration

In an intensive care unit, a respiratory therapist assesses a patient with acute respiratory failure, sets ventilator parameters to improve oxygenation and reduce tidal volumes to limit lung injury, titrates oxygen for a COPD exacerbation on noninvasive ventilation, and teaches airway clearance techniques to a patient with cystic fibrosis.

Misapplication

Delivering high concentrations of supplemental oxygen without clinical indication or adjusting ventilator settings based on manufacturer defaults rather than individualized physiology, which can cause oxygen toxicity or ventilator-induced lung injury.

Consequence

When applied correctly, respiratory therapy improves gas exchange, reduces respiratory distress, shortens length of ventilatory support, lowers complication rates, and supports recovery and functional respiratory outcomes.

Reversal

A reversed approach would prioritize equipment use or protocol adherence over individualized assessment, or withhold indicated respiratory support, resulting in deterioration of gas exchange and increased morbidity.

Boundary

Includes patient assessment, bedside interventions, device management, patient and family education for acute and chronic respiratory conditions; excludes physician-only diagnostic interpretation (pulmonology), primary surgical procedures, and services exclusively limited to nonrespiratory cardiovascular care.

Semantic Tension

Often conflated with pulmonology (medical specialty) or with general nursing respiratory tasks; the tension lies between a specialized procedural/device-focused practice and broader medical diagnosis/management responsibilities.

Synthesis

Respiratory therapy is the patient-centered application of physiologic assessment, therapeutic modalities, and device management to restore and maintain safe, efficient pulmonary function while preventing therapy-related harm.