Sleep Promotion in a Busy Inner City High Dependency Unit

ABSTRACT

Introduction: Critical care patients commonly have disrupted sleep patterns, with reduction of REM sleep, duration of sleep, increased fragmentation and loss of circadian rhythm.1 Causes include the patients' pathophysiology, medications administered and the busy critical care environment. Data collection showed that our patients were sleeping, on average, for a single block of sleep of 3.5 hours. Delirium rates and its known deleterious effects are highly associated with poor sleep, as well as an impairment of psychomotor performance and neurocognitive dysfunction. Sleep deprivation in the healthy population impairs lymphocyte action, cytokine production and pro-inflammatory balance, as well as a reduction in respiratory function and prolongation of respiratory support.2 Objectives: To firstly measure the sleep quality and explore the reasons behind poor sleep from the patients themselves and to gauge the MDT knowledge and interest in sleep, as a fundamental component of patient management. Then using the results we aimed to improve the duration and quality of the patients sleep on high dependency unit. Method(s) The Adapted Richard Campbell Sleep Questionnaire was given to all patients in the HDU over a 4 week period. Results were analysed, then stored for post intervention comparison. The duration of sleep was documented for all patients and a staff questionnaire was done to assess knowledge and concern of staff. Interventions included a staff sleep awareness week with education and prompts attached to the charting tables promoting sleep. Face masks and ear plugs were freely available to be distributed at the evening ward round. The critical care pharmacist identified medications that could alter the patients ability to achieve REM sleep - e.g. evening administered PPIs, and melatonin was commenced early when sleep was troublesome. Estates fixed soft close doors and soft closed bins supplied for clinical areas. After interventions, there was a further 4 week study period where the above factors were repeated. The need for natural light was highlighted and thus this was optimized in the ward environment and those physiologically able were offered trips outdoors to facilitate normal day night wake cycle. With the COVID pandemic ongoing we also endeavored to limit movement overnight of venerable patients. Result(s) The original data collection was of 45 patients with multiple data points, and the second of 27 patients with multiple data points. Results from the Adapted Richard Campbell Sleep Questionnaire were compared using a one tailed students t test. There were significant increases in the subjective quality of sleep (p=0.046) and quantity of sleep (p=0.00018). Reasons given as to improvement of sleep were reduction in discomfort from monitoring and the bed (p=0.026), reduced ambient light (p=0.031) and reduced impact from the presence of other patients (p=0.002). Conclusion(s) There was marked improvement in the awareness of the importance of sleep within the critical care team after education promoting a change in attitude and culture towards sleep. We are planning a second iteration targeting sedation, noise from monitors and staff and overnight interventions. Although this has been done with level 2 patients, extension to level 3 areas would be beneficial.