Management of ICU Delirium

Introduction to Delirium Management

The American College of Critical Care Medicine recommends that the term "ICU psychosis" be abandoned in favor of delirium, a medical emergency requiring systematic identification of underlying organic causes and evidence-based nonpharmacologic interventions as first-line management 1
Delirium in the ICU is associated with increased mortality, prolonged ICU and hospital length of stay, and development of post-ICU cognitive impairment 1, 2

Early mobilization should be performed whenever feasible to reduce both incidence and duration of delirium, which is a strong recommendation based on solid evidence and directly impacts morbidity and mortality outcomes 1, 2, 3
Optimizing sleep-wake cycles by controlling light and noise, clustering patient care activities, and decreasing nighttime stimuli is recommended for all patients 1, 2, 3
Ensuring adequate analgesia before administering sedatives is crucial 1, 4
Minimizing causative medications, particularly benzodiazepines, is recommended 1, 2, 3

Target light sedation levels using daily sedation interruption or light sedation protocols in mechanically ventilated patients 1, 2, 3
Dexmedetomidine is preferred over benzodiazepine infusions for sedation in mechanically ventilated patients 1, 2, 3, 4
Dexmedetomidine reduces delirium duration compared to benzodiazepines 1, 4

Haloperidol or atypical antipsychotics should not be used for delirium prevention, as there is no evidence they reduce incidence or duration 1, 2, 3
Atypical antipsychotics may reduce delirium duration, but the evidence is weak (grade C) 1, 2, 3
Rivastigmine is contraindicated for delirium treatment 1, 2, 3

Routine monitoring for delirium using validated bedside instruments is recommended for all adult ICU patients 5
Validated scales should be used to objectively quantify symptoms 6

Four baseline risk factors significantly predict ICU delirium: preexisting dementia, history of hypertension, history of alcoholism, and high severity of illness at admission 1, 2, 3
Coma is an independent risk factor for ICU delirium 1, 2, 3

Lorazepam continuous infusions should not be used in ICU patients due to the risk of propylene glycol toxicity 4
Sedatives should not be abruptly discontinued after prolonged use; instead, they should be tapered over several days to prevent withdrawal 4
Dexmedetomidine loading doses should be avoided in hemodynamically unstable patients 4