The goal of the trial is to learn if a strategy to eliminate audible alarm noise in intensive care and high dependency units can reduce overall noise levels, patient delirium, staff alarm fatigue, and staff burnout. Researchers will implement a silent alarm strategy in specific care units for four weeks and compare this to a separate 4 weeks where a silent strategy is not implemented. Noise, burnout, delirium levels, and staff alarm response times will be compared between the silent and non-silent units.
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Confusion Assessment Method - (CAM-S long form)
Timeframe: The CAM-S long form will be recorded every 12 hours during the four-week experimental period and also every 12 hours during the four-week control period.
Unit noise levels (Decibels)
Timeframe: 10 seconds Decibel measurement periods will be recorded consecutively for two four-week periods, consisting of the four-week intervention period, and the four-week control period.
Alarm Fatigue
Timeframe: The staff response times will be measured (in seconds) for every alarm occurring during the four-week intervention and control periods.