Duration of antibiotic therapy in the intensive care unit: factors influencing decision-making during multidisciplinary meetings.

Objectives: In the intensive care unit (ICU), antibiotics are often given longer than recommended in guidelines. A better understanding of the factors influencing antibiotic therapy duration is needed to develop improvement strategies to effectively address these drivers of excessive duration. This study aimed to explore the determinants of adherence to recommended antibiotic therapy durations among healthcare professionals involved in antibiotic decision-making within the ICU, focusing on multidisciplinary meetings (MDMs).

Methods: Semistructured interviews were held with healthcare professionals involved in antibiotic decision-making during MDMs in four Dutch ICUs. Participants included intensivists, clinical microbiologists and ICU residents. Transcripts were analysed using deductive and inductive content analysis methods.

Results: A total of 20 participants were interviewed. The interviews revealed that decision-making regarding antibiotic therapy duration is a complex process, primarily centred around professional interactions during MDMs and involving a broad range of determinants. These determinants were categorised into the following four steps: (1) the introduction of duration as a topic for discussion in the MDM (eg, lack of priority to discuss antibiotic therapy duration); (2) the discussion of antibiotic therapy duration itself (eg, lack of core members during MDM); (3) the establishment of a concrete decision (eg, lack of documentation of the decisions made); (4) the execution of the decision (eg, forgetting to stop antibiotics).

Conclusions: Our study identified numerous factors that influence decisions about the duration of antibiotic therapy during MDMs in the ICU. By describing these factors throughout the decision-making process, we provided valuable insights into barriers that commonly arise in specific steps, highlighting critical areas for improvement. Daily MDMs were deemed essential for informed decision-making regarding antibiotic therapy duration by the interviewees. Strategies to improve appropriate duration in the ICU should prioritise strengthening interdisciplinary communication between healthcare professionals and adding structure to these meetings.