Nurse decision-making when managing noradrenaline in the intensive care unit: A naturalistic observational study

Intensive care nurses care for critically ill patients in a complex, fast paced environment. Management of noradrenaline (norepinephrine) is core business for intensive care nurses and nurse decision-making on noradrenaline is poorly understood. The study objective was to investigate decision-making processes nurses use when caring for intensive care unit patients receiving noradrenaline.A qualitative exploratory design used the Cognitive Continuum Theory as a framework for naturalistic observations and interviews in two medical/surgical intensive care units in Melbourne, Australia.Observational and interview data from field notes and audiovisual recordings were transcribed and coded to develop themes using reflexive thematic analysis.Fourteen nurse and patient dyads were recruited to observational sessions from December 2019 to June 2021. Three major themes developed were Learning through doing; Individualised patient care; and Clinical expertise, with six supporting sub-themes. Nurses learned to manage noradrenaline experientially and developed titration and weaning strategies to support decision-making. Blood pressure targets and monitor alarms were used consistently to aid decision-making processes. Nurses were observed practicing across the cognitive continuum depending on knowledge structure, complexity of interventions, response time, and patient acuity.Experiential learning of complex and high-risk interventions in the absence of guidelines or algorithms meant nurses developed their own titration and weaning strategies based on constant evaluation and re-evaluation of patient cues. Patient heterogeneity, cue ambiguity and a dynamic practice environment contributed to decision-making complexity that would benefit from development of evidence-based practice resources.Nurses learn to manage noradrenaline through experiential learning, using blood pressure targets and monitor alarms to support decision-making when titrating and weaning noradrenaline. Nurses develop noradrenaline titration and weaning strategies to support decision-making in the absence of guidelines or algorithms. Supporting nurse decision-making and streamlining practice would reduce practice variation and cognitive workload.