Objectives: The primary objective was to identify the proportion of patients on mechanical ventilation (MV) beyond day 10, the recently defined time of onset of Persistent Critical Illness (PerCI). The secondary objective was to identify underlying diagnoses, intensive care unit (ICU) based therapies, relevant complications, and outcomes of patients with PerCI.
Subjects: 100 PerCI patients and 100 age, sex, mechanical ventilation for >24 h, acute physiology and chronic health score (APACHE III) and co-morbidity score-matched controls.
Main results: The maximum proportion of PerCI patients requiring invasive MV beyond day 10 was 66%. PerCI patients were more likely to have respiratory, septic, or neurosurgical admission diagnoses (p = .01). In the first 10 ICU days, they received multiple types of ICU-based treatments for longer duration and had a higher incidence rate of ventilator-associated pneumonia (VAP) (p = .008). Hospital discharge destination differed significantly (p≤.001), with greater mortality (34% vs. 22%) and discharge to chronic care facility (11% vs. 0%).
Conclusions: Mechanical ventilation beyond day 10 affected only two thirds of PerCI patients. However, VAP was a key complication in such patients. Discharge to chronic care facilities and hospital mortality were more common in PerCI patients.
Keywords: Delirium; Intensive care; Mechanical ventilation; Mortality; Nutrition; Persistent critical illness; Vasopressors.
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