Towards codesign in respiratory care: development of an implementation-ready intervention to improve guideline-adherent adult asthma care across primary and secondary care settings (The SENTINEL Project).

Short-acting beta agonist (SABA) overuse (≥3 canisters annually) is associated with worse asthma outcomes and accounts for the majority of greenhouse gas emissions from asthma inhalers in England. Reducing SABA overuse aligns with the National Health Service long-term plan to optimise asthma treatment while minimising environmental impact, but adoption of local asthma guidelines for a SABA-free maintenance and reliever therapy strategy for step 3 asthma patients is limited. In this we describe patient and staff involvement in a codesign process adapted from experience-based codesign (EBCD) principles to develop an implementation-ready intervention within a practice-relevant timescale.The codesigned intervention consists of five pillars: healthcare professional education; implementation of 'gold standard' prescribing practices; targeted asthma reviews; patient education and support; and real-time data monitoring and reporting of asthma care metrics. The codesign process contributed to all pillars and, by identifying potential individual and organisational barriers to implementation, enabled the development of plans to address these barriers.In this we reflect on the strengths and weaknesses of our codesign process, outline how EBCD principles can be used in respiratory research and propose actions for patients, health professionals, researchers and funders to develop the potential of EBCD in respiratory research.