[Post-Intensive Care Syndrome: functional impairments of critical illness survivors]

With a decrease in mortality of critically ill patients in recent years, intensive care medicine research has shifted its focus on functional impairments of intensive care units (ICU) survivors. ICU survivorship is characterized by long-term impairments of cognition, mental health, and physical health. Since 2012, these impairments have been summarized with the umbrella term Post-Intensive Care Syndrome (PICS). Mental health impairments frequently entail new are aggravated symptoms of depression, anxiety, and posttraumatic stress disorder. Beyond impairments in the three PICS domains, critical illness survivors frequently suffer from chronic pain, dysphagia, and nutritional deficiencies. Furthermore, they have a higher risk for osteoporosis, bone fractures, and diabetes mellitus. Taken together, these sequelae reduce their health-related quality of life. Additionally, ICU survivors are challenged by social problems such as isolation, economic problems such as treatment costs and lost earnings, and return to previous employment. Yet, patients and caregivers have described post-ICU care as inadequate and fragmented. ICU follow-up clinics could improve post-ICU care, but there is insufficient evidence for their effectiveness. Thus far, large high-quality trials with multicomponent and interdisciplinary post-ICU interventions have mostly failed to improve patient outcomes. Hence, preventing PICS and minimizing risk factors by optimizing ICU care is crucial, e.g. by implementing the ABCDE bundle. Future studies need to identify effective components of post-ICU recovery interventions and determine which patient populations may benefit most from ICU recovery services.