A 24-year-old with cystic fibrosis admitted for exacerbation has thick retained secretions, wheezing, and prescriptions for albuterol, dornase alfa, inhaled tobramycin, and airway clearance. Treatments are clustered and time is limited. Which aerosol medication sequence should the therapist select to maximize deposition and clearance?
Select an answer to reveal the explanation.
Short Explanation
You've got the right order because you're clearing the path before you send in the heavy help, like unclogging a drain before you pour in cleaner. Give your albuterol first, then dornase alfa, then do airway clearance before you use tobramycin so deposition lands where it counts.
Full Explanation
Bronchodilation before mucolytics reduces airway tone and improves peripheral deposition, dornase alfa then thins DNA-laden mucus, airway clearance mobilizes loosened secretions, and inhaled antibiotics last achieve higher retained concentrations on cleared surfaces, a sequence that balances bronchodilator onset, enzyme contact time, and antibiotic retention. Giving tobramycin first wastes antibiotic on mucus destined for expectoration, then following clearance with combined bronchodilator and mucolytic loses the deposition benefit of pretreatment. Starting with dornase alfa without bronchodilation limits peripheral delivery in wheezing patients, and giving antibiotic before clearance followed by delayed clearance reduces retained dose and prolongs obstruction. Mixing albuterol, dornase alfa, and tobramycin together risks physicochemical incompatibility, altered particle size, and loss of timed effects without manufacturer compatibility data. Exam caveat: never combine admixtures unless compatibility is established; sequence matters more than speed. Practical check: use appropriate nebulizer, assess wheeze and sputum volume between steps, and rinse and disinfect devices per protocol.