Critical care medicine
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Critical care medicine · Aug 2016
Hospital Variation in Early Tracheostomy in the United States: A Population-Based Study.
Controversy exists regarding perceived benefits of early tracheostomy to facilitate weaning among mechanically ventilated patients, potentially leading to significant practice-pattern variation with implications for outcomes and resource utilization. We sought to determine practice-pattern variation and outcomes associated with tracheostomy timing in the United States. ⋯ Early tracheostomy is potentially overused among mechanically ventilated trauma patients, with nearly half of tracheostomies performed within the first week of mechanical ventilation and large unexplained hospital variation, without clear benefits. Future studies are needed to characterize potentially differential benefits for early tracheostomy between disease subgroups and to investigate factors driving hospital variation in tracheostomy timing.
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Critical care medicine · Aug 2016
Multicenter StudyAssociation Between Resilience and Family Member Psychologic Symptoms in Critical Illness.
There are increased rates of depression, anxiety, and stress disorders in families of critically ill patients. Interventions directed at family members may help their ability to cope with this stress. Specifically, resilience is a teachable psychologic construct describing a person's ability to adapt to traumatic situations. Resilience can inherently assist individuals to diminish adverse psychologic outcomes. Consequently, we determined the relationship between resilience and symptoms of depression, anxiety, and acute stress in family members of critically ill patients. ⋯ When caring for the critically ill, resilient family members have fewer symptoms of depression, anxiety, and acute stress. Resilient families were generally better satisfied with the care delivered. These data suggest that interventions aimed at increasing resilience may improve a family member's experience in the ICU.
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Critical care medicine · Aug 2016
Trends in Critical Care Beds and Use Among Population Groups and Medicare and Medicaid Beneficiaries in the United States: 2000-2010.
To analyze patterns of critical care medicine beds, use, and costs in acute care hospitals in the United States and relate critical care medicine beds and use to population shifts, age groups, and Medicare and Medicaid beneficiaries from 2000 to 2010. ⋯ Critical care medicine beds, use, and costs in the United States continue to rise. The increasing use of critical care medicine by the premature/neonatal and Medicaid populations should be considered by healthcare policy makers, state agencies, and hospitals as they wrestle with critical care bed growth and the associated costs.
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Critical care medicine · Aug 2016
High Intracranial Pressure Induced Injury in the Healthy Rat Brain.
We recently showed that increased intracranial pressure to 50 mm Hg in the healthy rat brain results in microvascular shunt flow characterized by tissue hypoxia, edema, and increased blood-brain barrier permeability. We now determined whether increased intracranial pressure results in neuronal injury by Fluoro-Jade stain and whether changes in cerebral blood flow and cerebral metabolic rate for oxygen suggest nonnutritive microvascular shunt flow. ⋯ High intracranial pressure likely caused neuronal injury because of a transition from normal capillary flow to nonnutritive microvascular shunt flow resulting in tissue hypoxia and edema, and it is manifest by a reduction in the cerebral metabolic rate for oxygen.
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Critical care medicine · Aug 2016
Spontaneous Effort During Mechanical Ventilation: Maximal Injury With Less Positive End-Expiratory Pressure.
We recently described how spontaneous effort during mechanical ventilation can cause "pendelluft," that is, displacement of gas from nondependent (more recruited) lung to dependent (less recruited) lung during early inspiration. Such transfer depends on the coexistence of more recruited (source) liquid-like lung regions together with less recruited (target) solid-like lung regions. Pendelluft may improve gas exchange, but because of tidal recruitment, it may also contribute to injury. We hypothesize that higher positive end-expiratory pressure levels decrease the propensity to pendelluft and that with lower positive end-expiratory pressure levels, pendelluft is associated with improved gas exchange but increased tidal recruitment. ⋯ Spontaneous effort at low positive end-expiratory pressure improved oxygenation but promoted tidal recruitment associated with pendelluft. Optimized positive end-expiratory pressure (set after lung recruitment) may reverse the harmful effects of spontaneous breathing by reducing inspiratory effort, pendelluft, and tidal recruitment.