Effectiveness and Safety of an Extended ICU Visitation Model for Delirium Prevention: A Before and After Study.

Objectives: To evaluate the effect of an extended visitation model compared with a restricted visitation model on the occurrence of delirium among ICU patients. Design: Prospective single-center before and after study. Setting: Thirty-one-bed medical-surgical ICU. Patients: All patients greater than or equal to 18 years old with expected length of stay greater than or equal to 24 hours consecutively admitted to the ICU from May 2015 to November 2015. Interventions: Change of visitation policy from a restricted visitation model (4.5 hr/d) to an extended visitation model (12 hr/d). Measurements and Main Results: Two hundred eighty-six patients were enrolled (141 restricted visitation model, 145 extended visitation model). The primary outcome was the cumulative incidence of delirium, assessed bid using the confusion assessment method for the ICU. Predefined secondary outcomes included duration of delirium/coma; any ICU-acquired infection; ICU-acquired bloodstream infection, pneumonia, and urinary tract infection; all-cause ICU mortality; and length of ICU stay. The median duration of visits increased from 133 minutes (interquartile range, 97.7-162.0) in restricted visitation model to 245 minutes (interquartile range, 175.0-272.0) in extended visitation model (p

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