MEDICAL EARLY RESPONSE INTERVENTION AND THERAPY (MERIT): A RANDOMISED CLINICAL TRIAL

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Every year, between 12,000 and 23,000 deaths are associated with in-hospital adverse events, making them one of the leading causes of death in the general population. These adverse events lost Australia over three million bed-days per year, and cost the country up to $4.7 billion every year. Among the adverse events, death, cardiac arrest and unplanned admissions to intensive care unit (ICU) are the most serious occurrences. The majority of the events were preceded by serious clinical deterioration, which can be easily identified. Recognising these problems, a hospital-wide intervention system called the Medical Emergency Team (MET) has been developed in Australia over the last 10 years. Under this system, when a patient's clinical condition is unstable, a call is immediately placed to the MET for intervention. Preliminary data have shown that the MET can reduce in-hospital deaths, cardiac arrests and unplanned ICU admissions. However, past studies have been based on observational design and their results lack scientific credence due to uncontrolled confounders and biases. It is proposed to conduct a multi-centre randomised clinical trial to test the hypothesis that the implementation of the hospital-wide MET system will reduce the aggregate incidence of the following three adverse events: unplanned admissions to intensive care units, cardiopulmonary arrest, and in-hospital death. The study will involve 20 Australian and New Zealand hospitals, each with at least 20,000 admissions per year. This study will provide crucial scientific evidence for health managers and governments to make decision on the implementation of MET in Australian and New Zealand hospitals. If the MET system is shown to reduce adverse events as observed in preliminary studies, then the introduction of MET could save approximately 4000 lives, avoid 1500 cardiac arrests, and prevent 2500 unplanned ICU admissions every year.