An RT is performing airway clearance therapy on a 3-month-old infant with right lower lobe atelectasis. During treatment, the infant’s SpO₂ decreases significantly. Which complication is most likely responsible?

A child was intubated for severe respiratory failure. The underlying lung disease has improved, and the child is breathing spontaneously with an adequate tidal volume. However, the child remains poorly responsive, has a weak cough, and cannot manage oral secretions. Which action is most appropriate?

A patient with muscular dystrophy is unable to generate an effective cough and has retained secretions despite suctioning. Which therapy would most directly improve secretion clearance?

A 15-year-old with cystic fibrosis receives airway clearance treatments. The physician asks how long each session should generally last. What duration is most appropriate?

A premature infant weighing 1.5 kg requires orotracheal intubation, at what depth should the ETT initially be secured?

Immediately after intubation, a child develops decreased breath sounds over the left chest and worsening hypoxemia. Breath sounds remain present over the right chest. Which complication should the respiratory therapist suspect first?

Which aerosol delivery device uses a piezoelectric crystal vibrating at a high frequency to generate aerosol particles?

A patient is receiving autogenic drainage. The therapist instructs the patient to begin at low lung volumes, progress to tidal breathing, and eventually breathe at higher lung volumes. What is the primary purpose of this progression?

Which oxygen delivery device is considered a fixed-performance device because it can deliver a predictable FiO₂?

A 4-year-old child is being evaluated before elective airway management. Assessment reveals a mouth opening of less than two fingerbreadths, a short neck, limited neck extension, and a decreased thyromental distance. Which intervention is most appropriate?