The Value Of The Modified Early Warning Score For Unplanned Intensive Care Unit Admissions Of Patients Treated In Hospital General Wards

AimTo determine the value of the Modified Early Warning Score (MEWS) for general ward patients and its potential use as an alarm tool for ward nurses.MethodsA combined prospective-retrospective observational study was conducted with 153 patients in a university hospital (2013-2014). All patients were admitted to the intensive care unit (ICU) from general wards. Parameters retrospectively studied were 5 MEWS values at 4 hourly intervals, up to 20hours before ICU admission. Parameters prospectively studied were ICU length of stay, ICU mortality, and mortality after ICU discharge.ResultsMost frequent severe adverse events were acute respiratory failure (39.9%) and septic shock (20.3%). Modified Early Warning Score increased gradually during the last 20hours, and most patients remained in the wards, above a cut-off point 7 recorded at 4hours before admission. Significant associations between latest MEWS score and ICU mortality and ICU length of stay were found. MEWS score7hours before admission was highly associated with increased ICU and hospital mortality.ConclusionPatient deterioration in general wards can result in severe adverse events. Modified Early Warning Score is a strong predictor of outcome and may be used as a monitoring tool for potentially avoidable deaths and unplanned admissions to ICU.